Mercurial > cpython-lru_cache-weakref

annotate Modules/_csv.c @ 62398:ea25129b94fe 3.1

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Blocked revisions 82071 via svnmerge ........ r82071 | alexander.belopolsky | 2010-06-18 12:57:49 -0400 (Fri, 18 Jun 2010) | 1 line Added a new line at the end of the file. ........
author Alexander Belopolsky <alexander.belopolsky@gmail.com>
date Fri, 18 Jun 2010 16:59:25 +0000
parents f197407bdba2
children 6e8f5878849c
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1 /* csv module */
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2
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3 /*
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4
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5 This module provides the low-level underpinnings of a CSV reading/writing
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6 module. Users should not use this module directly, but import the csv.py
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7 module instead.
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8
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9 **** For people modifying this code, please note that as of this writing
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10 **** (2003-03-23), it is intended that this code should work with Python
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11 **** 2.2.
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12
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13 */
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14
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15 #define MODULE_VERSION "1.0"
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16
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17 #include "Python.h"
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18 #include "structmember.h"
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19
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20 #define IS_BASESTRING(o) \
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21 PyUnicode_Check(o)
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22
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23 static PyObject *error_obj; /* CSV exception */
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24 static PyObject *dialects; /* Dialect registry */
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25 static long field_limit = 128 * 1024; /* max parsed field size */
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26
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27 typedef enum {
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28 START_RECORD, START_FIELD, ESCAPED_CHAR, IN_FIELD,
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29 IN_QUOTED_FIELD, ESCAPE_IN_QUOTED_FIELD, QUOTE_IN_QUOTED_FIELD,
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30 EAT_CRNL
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31 } ParserState;
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32
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33 typedef enum {
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34 QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE
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35 } QuoteStyle;
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36
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37 typedef struct {
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38 QuoteStyle style;
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39 char *name;
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40 } StyleDesc;
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41
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42 static StyleDesc quote_styles[] = {
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43 { QUOTE_MINIMAL, "QUOTE_MINIMAL" },
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44 { QUOTE_ALL, "QUOTE_ALL" },
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45 { QUOTE_NONNUMERIC, "QUOTE_NONNUMERIC" },
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46 { QUOTE_NONE, "QUOTE_NONE" },
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47 { 0 }
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48 };
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49
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50 typedef struct {
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51 PyObject_HEAD
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52
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53 int doublequote; /* is " represented by ""? */
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54 Py_UNICODE delimiter; /* field separator */
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55 Py_UNICODE quotechar; /* quote character */
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56 Py_UNICODE escapechar; /* escape character */
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57 int skipinitialspace; /* ignore spaces following delimiter? */
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58 PyObject *lineterminator; /* string to write between records */
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59 int quoting; /* style of quoting to write */
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60
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61 int strict; /* raise exception on bad CSV */
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62 } DialectObj;
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63
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64 static PyTypeObject Dialect_Type;
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65
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66 typedef struct {
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67 PyObject_HEAD
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68
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69 PyObject *input_iter; /* iterate over this for input lines */
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70
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71 DialectObj *dialect; /* parsing dialect */
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72
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73 PyObject *fields; /* field list for current record */
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74 ParserState state; /* current CSV parse state */
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75 Py_UNICODE *field; /* build current field in here */
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76 int field_size; /* size of allocated buffer */
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77 Py_ssize_t field_len; /* length of current field */
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78 int numeric_field; /* treat field as numeric */
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79 unsigned long line_num; /* Source-file line number */
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80 } ReaderObj;
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81
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82 static PyTypeObject Reader_Type;
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83
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84 #define ReaderObject_Check(v) (Py_TYPE(v) == &Reader_Type)
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85
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86 typedef struct {
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87 PyObject_HEAD
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88
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89 PyObject *writeline; /* write output lines to this file */
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90
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91 DialectObj *dialect; /* parsing dialect */
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92
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93 Py_UNICODE *rec; /* buffer for parser.join */
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94 int rec_size; /* size of allocated record */
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95 Py_ssize_t rec_len; /* length of record */
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96 int num_fields; /* number of fields in record */
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97 } WriterObj;
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98
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99 static PyTypeObject Writer_Type;
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100
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101 /*
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102 * DIALECT class
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103 */
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104
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105 static PyObject *
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106 get_dialect_from_registry(PyObject * name_obj)
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107 {
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108 PyObject *dialect_obj;
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109
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110 dialect_obj = PyDict_GetItem(dialects, name_obj);
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111 if (dialect_obj == NULL) {
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112 if (!PyErr_Occurred())
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113 PyErr_Format(error_obj, "unknown dialect");
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114 }
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115 else
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116 Py_INCREF(dialect_obj);
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117 return dialect_obj;
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118 }
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119
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120 static PyObject *
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121 get_string(PyObject *str)
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122 {
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123 Py_XINCREF(str);
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124 return str;
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125 }
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126
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127 static PyObject *
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128 get_nullchar_as_None(Py_UNICODE c)
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129 {
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130 if (c == '\0') {
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131 Py_INCREF(Py_None);
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132 return Py_None;
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133 }
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134 else
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135 return PyUnicode_FromUnicode((Py_UNICODE *)&c, 1);
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136 }
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137
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138 static PyObject *
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139 Dialect_get_lineterminator(DialectObj *self)
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140 {
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141 return get_string(self->lineterminator);
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142 }
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143
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144 static PyObject *
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145 Dialect_get_delimiter(DialectObj *self)
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146 {
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147 return get_nullchar_as_None(self->delimiter);
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148 }
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149
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150 static PyObject *
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151 Dialect_get_escapechar(DialectObj *self)
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152 {
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153 return get_nullchar_as_None(self->escapechar);
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154 }
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155
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156 static PyObject *
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157 Dialect_get_quotechar(DialectObj *self)
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158 {
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159 return get_nullchar_as_None(self->quotechar);
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160 }
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161
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162 static PyObject *
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163 Dialect_get_quoting(DialectObj *self)
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164 {
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165 return PyLong_FromLong(self->quoting);
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166 }
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167
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168 static int
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169 _set_bool(const char *name, int *target, PyObject *src, int dflt)
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170 {
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171 if (src == NULL)
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172 *target = dflt;
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173 else
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174 *target = PyObject_IsTrue(src);
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175 return 0;
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176 }
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177
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178 static int
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179 _set_int(const char *name, int *target, PyObject *src, int dflt)
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180 {
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181 if (src == NULL)
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182 *target = dflt;
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183 else {
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184 long value;
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185 if (!PyLong_CheckExact(src)) {
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186 PyErr_Format(PyExc_TypeError,
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187 "\"%s\" must be an integer", name);
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188 return -1;
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189 }
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190 value = PyLong_AsLong(src);
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191 if (value == -1 && PyErr_Occurred())
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192 return -1;
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193 #if SIZEOF_LONG > SIZEOF_INT
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194 if (value > INT_MAX || value < INT_MIN) {
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195 PyErr_Format(PyExc_ValueError,
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196 "integer out of range for \"%s\"", name);
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197 return -1;
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198 }
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199 #endif
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200 *target = (int)value;
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201 }
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202 return 0;
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203 }
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204
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205 static int
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206 _set_char(const char *name, Py_UNICODE *target, PyObject *src, Py_UNICODE dflt)
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207 {
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208 if (src == NULL)
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209 *target = dflt;
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210 else {
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211 *target = '\0';
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212 if (src != Py_None) {
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213 Py_UNICODE *buf;
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214 Py_ssize_t len;
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215 buf = PyUnicode_AsUnicode(src);
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216 len = PyUnicode_GetSize(src);
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217 if (buf == NULL || len > 1) {
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218 PyErr_Format(PyExc_TypeError,
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219 "\"%s\" must be an 1-character string",
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220 name);
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221 return -1;
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222 }
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223 if (len > 0)
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224 *target = buf[0];
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225 }
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226 }
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227 return 0;
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228 }
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229
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230 static int
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231 _set_str(const char *name, PyObject **target, PyObject *src, const char *dflt)
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232 {
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233 if (src == NULL)
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234 *target = PyUnicode_DecodeASCII(dflt, strlen(dflt), NULL);
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235 else {
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236 if (src == Py_None)
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237 *target = NULL;
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238 else if (!IS_BASESTRING(src)) {
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239 PyErr_Format(PyExc_TypeError,
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240 "\"%s\" must be a string", name);
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241 return -1;
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242 }
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243 else {
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244 Py_XDECREF(*target);
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245 Py_INCREF(src);
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246 *target = src;
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247 }
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248 }
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249 return 0;
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250 }
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251
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252 static int
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253 dialect_check_quoting(int quoting)
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254 {
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255 StyleDesc *qs = quote_styles;
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256
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257 for (qs = quote_styles; qs->name; qs++) {
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258 if (qs->style == quoting)
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259 return 0;
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260 }
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261 PyErr_Format(PyExc_TypeError, "bad \"quoting\" value");
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262 return -1;
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263 }
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264
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265 #define D_OFF(x) offsetof(DialectObj, x)
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266
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267 static struct PyMemberDef Dialect_memberlist[] = {
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268 { "skipinitialspace", T_INT, D_OFF(skipinitialspace), READONLY },
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269 { "doublequote", T_INT, D_OFF(doublequote), READONLY },
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270 { "strict", T_INT, D_OFF(strict), READONLY },
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271 { NULL }
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272 };
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273
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274 static PyGetSetDef Dialect_getsetlist[] = {
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275 { "delimiter", (getter)Dialect_get_delimiter},
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276 { "escapechar", (getter)Dialect_get_escapechar},
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277 { "lineterminator", (getter)Dialect_get_lineterminator},
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278 { "quotechar", (getter)Dialect_get_quotechar},
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279 { "quoting", (getter)Dialect_get_quoting},
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280 {NULL},
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281 };
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282
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283 static void
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284 Dialect_dealloc(DialectObj *self)
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285 {
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286 Py_XDECREF(self->lineterminator);
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287 Py_TYPE(self)->tp_free((PyObject *)self);
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288 }
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289
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290 static char *dialect_kws[] = {
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291 "dialect",
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292 "delimiter",
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293 "doublequote",
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294 "escapechar",
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295 "lineterminator",
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296 "quotechar",
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297 "quoting",
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298 "skipinitialspace",
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299 "strict",
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300 NULL
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301 };
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302
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303 static PyObject *
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304 dialect_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
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305 {
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306 DialectObj *self;
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307 PyObject *ret = NULL;
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308 PyObject *dialect = NULL;
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309 PyObject *delimiter = NULL;
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310 PyObject *doublequote = NULL;
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311 PyObject *escapechar = NULL;
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312 PyObject *lineterminator = NULL;
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313 PyObject *quotechar = NULL;
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314 PyObject *quoting = NULL;
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315 PyObject *skipinitialspace = NULL;
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316 PyObject *strict = NULL;
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317
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318 if (!PyArg_ParseTupleAndKeywords(args, kwargs,
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319 "|OOOOOOOOO", dialect_kws,
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320 &dialect,
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321 &delimiter,
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322 &doublequote,
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323 &escapechar,
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324 &lineterminator,
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325 &quotechar,
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326 &quoting,
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327 &skipinitialspace,
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328 &strict))
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329 return NULL;
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330
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331 if (dialect != NULL) {
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332 if (IS_BASESTRING(dialect)) {
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333 dialect = get_dialect_from_registry(dialect);
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334 if (dialect == NULL)
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335 return NULL;
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336 }
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337 else
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338 Py_INCREF(dialect);
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339 /* Can we reuse this instance? */
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340 if (PyObject_TypeCheck(dialect, &Dialect_Type) &&
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341 delimiter == 0 &&
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342 doublequote == 0 &&
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343 escapechar == 0 &&
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344 lineterminator == 0 &&
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345 quotechar == 0 &&
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346 quoting == 0 &&
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347 skipinitialspace == 0 &&
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348 strict == 0)
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349 return dialect;
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350 }
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351
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352 self = (DialectObj *)type->tp_alloc(type, 0);
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353 if (self == NULL) {
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354 Py_XDECREF(dialect);
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355 return NULL;
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356 }
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357 self->lineterminator = NULL;
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358
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359 Py_XINCREF(delimiter);
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360 Py_XINCREF(doublequote);
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361 Py_XINCREF(escapechar);
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362 Py_XINCREF(lineterminator);
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363 Py_XINCREF(quotechar);
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364 Py_XINCREF(quoting);
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365 Py_XINCREF(skipinitialspace);
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366 Py_XINCREF(strict);
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367 if (dialect != NULL) {
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368 #define DIALECT_GETATTR(v, n) \
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369 if (v == NULL) \
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370 v = PyObject_GetAttrString(dialect, n)
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371 DIALECT_GETATTR(delimiter, "delimiter");
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372 DIALECT_GETATTR(doublequote, "doublequote");
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373 DIALECT_GETATTR(escapechar, "escapechar");
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374 DIALECT_GETATTR(lineterminator, "lineterminator");
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375 DIALECT_GETATTR(quotechar, "quotechar");
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376 DIALECT_GETATTR(quoting, "quoting");
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377 DIALECT_GETATTR(skipinitialspace, "skipinitialspace");
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378 DIALECT_GETATTR(strict, "strict");
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379 PyErr_Clear();
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380 }
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381
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382 /* check types and convert to C values */
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383 #define DIASET(meth, name, target, src, dflt) \
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384 if (meth(name, target, src, dflt)) \
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385 goto err
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386 DIASET(_set_char, "delimiter", &self->delimiter, delimiter, ',');
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387 DIASET(_set_bool, "doublequote", &self->doublequote, doublequote, 1);
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388 DIASET(_set_char, "escapechar", &self->escapechar, escapechar, 0);
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389 DIASET(_set_str, "lineterminator", &self->lineterminator, lineterminator, "\r\n");
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390 DIASET(_set_char, "quotechar", &self->quotechar, quotechar, '"');
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391 DIASET(_set_int, "quoting", &self->quoting, quoting, QUOTE_MINIMAL);
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392 DIASET(_set_bool, "skipinitialspace", &self->skipinitialspace, skipinitialspace, 0);
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393 DIASET(_set_bool, "strict", &self->strict, strict, 0);
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394
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395 /* validate options */
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396 if (dialect_check_quoting(self->quoting))
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397 goto err;
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398 if (self->delimiter == 0) {
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399 PyErr_SetString(PyExc_TypeError, "delimiter must be set");
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400 goto err;
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401 }
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402 if (quotechar == Py_None && quoting == NULL)
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403 self->quoting = QUOTE_NONE;
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404 if (self->quoting != QUOTE_NONE && self->quotechar == 0) {
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405 PyErr_SetString(PyExc_TypeError,
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diff changeset
406 "quotechar must be set if quoting enabled");
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diff changeset
407 goto err;
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diff changeset
408 }
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diff changeset
409 if (self->lineterminator == 0) {
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diff changeset
410 PyErr_SetString(PyExc_TypeError, "lineterminator must be set");
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411 goto err;
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412 }
34340
be4929e5179b Improved the implementation of the internal "dialect" type. The new
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34331
diff changeset
413
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414 ret = (PyObject *)self;
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415 Py_INCREF(self);
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Andrew McNamara <andrewm@object-craft.com.au>
parents: 34331
diff changeset
416 err:
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417 Py_XDECREF(self);
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418 Py_XDECREF(dialect);
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419 Py_XDECREF(delimiter);
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420 Py_XDECREF(doublequote);
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421 Py_XDECREF(escapechar);
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422 Py_XDECREF(lineterminator);
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423 Py_XDECREF(quotechar);
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424 Py_XDECREF(quoting);
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425 Py_XDECREF(skipinitialspace);
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426 Py_XDECREF(strict);
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427 return ret;
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cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
428 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
429
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
430
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431 PyDoc_STRVAR(Dialect_Type_doc,
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432 "CSV dialect\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
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433 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
434 "The Dialect type records CSV parsing and generation options.\n");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
435
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
436 static PyTypeObject Dialect_Type = {
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437 PyVarObject_HEAD_INIT(NULL, 0)
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438 "_csv.Dialect", /* tp_name */
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439 sizeof(DialectObj), /* tp_basicsize */
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440 0, /* tp_itemsize */
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441 /* methods */
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442 (destructor)Dialect_dealloc, /* tp_dealloc */
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443 (printfunc)0, /* tp_print */
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444 (getattrfunc)0, /* tp_getattr */
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445 (setattrfunc)0, /* tp_setattr */
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446 0, /* tp_reserved */
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447 (reprfunc)0, /* tp_repr */
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448 0, /* tp_as_number */
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449 0, /* tp_as_sequence */
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450 0, /* tp_as_mapping */
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451 (hashfunc)0, /* tp_hash */
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452 (ternaryfunc)0, /* tp_call */
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453 (reprfunc)0, /* tp_str */
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454 0, /* tp_getattro */
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diff changeset
455 0, /* tp_setattro */
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456 0, /* tp_as_buffer */
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457 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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458 Dialect_Type_doc, /* tp_doc */
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459 0, /* tp_traverse */
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460 0, /* tp_clear */
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461 0, /* tp_richcompare */
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462 0, /* tp_weaklistoffset */
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463 0, /* tp_iter */
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464 0, /* tp_iternext */
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465 0, /* tp_methods */
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466 Dialect_memberlist, /* tp_members */
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467 Dialect_getsetlist, /* tp_getset */
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468 0, /* tp_base */
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469 0, /* tp_dict */
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470 0, /* tp_descr_get */
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471 0, /* tp_descr_set */
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472 0, /* tp_dictoffset */
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473 0, /* tp_init */
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474 0, /* tp_alloc */
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diff changeset
475 dialect_new, /* tp_new */
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476 0, /* tp_free */
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cc35ed2b26a8 new CSV file processing module - see PEP 305
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477 };
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
478
34390
28f84938468d Factor out the code for making a dialect instance.
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34389
diff changeset
479 /*
28f84938468d Factor out the code for making a dialect instance.
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diff changeset
480 * Return an instance of the dialect type, given a Python instance or kwarg
28f84938468d Factor out the code for making a dialect instance.
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481 * description of the dialect
28f84938468d Factor out the code for making a dialect instance.
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diff changeset
482 */
28f84938468d Factor out the code for making a dialect instance.
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483 static PyObject *
28f84938468d Factor out the code for making a dialect instance.
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diff changeset
484 _call_dialect(PyObject *dialect_inst, PyObject *kwargs)
28f84938468d Factor out the code for making a dialect instance.
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diff changeset
485 {
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486 PyObject *ctor_args;
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487 PyObject *dialect;
34390
28f84938468d Factor out the code for making a dialect instance.
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34389
diff changeset
488
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489 ctor_args = Py_BuildValue(dialect_inst ? "(O)" : "()", dialect_inst);
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490 if (ctor_args == NULL)
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491 return NULL;
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492 dialect = PyObject_Call((PyObject *)&Dialect_Type, ctor_args, kwargs);
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493 Py_DECREF(ctor_args);
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494 return dialect;
34390
28f84938468d Factor out the code for making a dialect instance.
Andrew McNamara <andrewm@object-craft.com.au>
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diff changeset
495 }
28f84938468d Factor out the code for making a dialect instance.
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34389
diff changeset
496
34418
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
497 /*
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
498 * READER
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
499 */
34409
1d866c02a8ca When quoting=QUOTE_NONNUMERIC, the reader now casts unquoted fields
Andrew McNamara <andrewm@object-craft.com.au>
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diff changeset
500 static int
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
501 parse_save_field(ReaderObj *self)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
502 {
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503 PyObject *field;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
504
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505 field = PyUnicode_FromUnicode(self->field, self->field_len);
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diff changeset
506 if (field == NULL)
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diff changeset
507 return -1;
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diff changeset
508 self->field_len = 0;
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diff changeset
509 if (self->numeric_field) {
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diff changeset
510 PyObject *tmp;
34409
1d866c02a8ca When quoting=QUOTE_NONNUMERIC, the reader now casts unquoted fields
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34408
diff changeset
511
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diff changeset
512 self->numeric_field = 0;
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513 tmp = PyNumber_Float(field);
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514 if (tmp == NULL) {
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diff changeset
515 Py_DECREF(field);
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516 return -1;
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517 }
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518 Py_DECREF(field);
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diff changeset
519 field = tmp;
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520 }
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521 PyList_Append(self->fields, field);
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diff changeset
522 Py_DECREF(field);
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523 return 0;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
524 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
525
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
526 static int
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
527 parse_grow_buff(ReaderObj *self)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
528 {
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diff changeset
529 if (self->field_size == 0) {
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diff changeset
530 self->field_size = 4096;
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531 if (self->field != NULL)
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532 PyMem_Free(self->field);
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533 self->field = PyMem_New(Py_UNICODE, self->field_size);
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534 }
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535 else {
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536 if (self->field_size > INT_MAX / 2) {
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537 PyErr_NoMemory();
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538 return 0;
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539 }
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diff changeset
540 self->field_size *= 2;
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diff changeset
541 self->field = PyMem_Resize(self->field, Py_UNICODE,
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
542 self->field_size);
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diff changeset
543 }
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diff changeset
544 if (self->field == NULL) {
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parents: 51271
diff changeset
545 PyErr_NoMemory();
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diff changeset
546 return 0;
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diff changeset
547 }
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diff changeset
548 return 1;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
549 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
550
34396
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
551 static int
42462
8b45f2297dbd SF patch# 1767398 by Adam Hupp.
Guido van Rossum <guido@python.org>
parents: 42455
diff changeset
552 parse_add_char(ReaderObj *self, Py_UNICODE c)
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
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parents:
diff changeset
553 {
61467
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diff changeset
554 if (self->field_len >= field_limit) {
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diff changeset
555 PyErr_Format(error_obj, "field larger than field limit (%ld)",
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diff changeset
556 field_limit);
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parents: 51271
diff changeset
557 return -1;
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diff changeset
558 }
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diff changeset
559 if (self->field_len == self->field_size && !parse_grow_buff(self))
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diff changeset
560 return -1;
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diff changeset
561 self->field[self->field_len++] = c;
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diff changeset
562 return 0;
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
563 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
564
34396
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
565 static int
42462
8b45f2297dbd SF patch# 1767398 by Adam Hupp.
Guido van Rossum <guido@python.org>
parents: 42455
diff changeset
566 parse_process_char(ReaderObj *self, Py_UNICODE c)
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
567 {
61467
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diff changeset
568 DialectObj *dialect = self->dialect;
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
569
61467
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diff changeset
570 switch (self->state) {
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parents: 51271
diff changeset
571 case START_RECORD:
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diff changeset
572 /* start of record */
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parents: 51271
diff changeset
573 if (c == '\0')
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parents: 51271
diff changeset
574 /* empty line - return [] */
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diff changeset
575 break;
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diff changeset
576 else if (c == '\n' || c == '\r') {
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diff changeset
577 self->state = EAT_CRNL;
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diff changeset
578 break;
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diff changeset
579 }
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parents: 51271
diff changeset
580 /* normal character - handle as START_FIELD */
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parents: 51271
diff changeset
581 self->state = START_FIELD;
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parents: 51271
diff changeset
582 /* fallthru */
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parents: 51271
diff changeset
583 case START_FIELD:
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parents: 51271
diff changeset
584 /* expecting field */
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diff changeset
585 if (c == '\n' || c == '\r' || c == '\0') {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
586 /* save empty field - return [fields] */
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Antoine Pitrou <solipsis@pitrou.net>
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587 if (parse_save_field(self) < 0)
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diff changeset
588 return -1;
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diff changeset
589 self->state = (c == '\0' ? START_RECORD : EAT_CRNL);
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diff changeset
590 }
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591 else if (c == dialect->quotechar &&
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diff changeset
592 dialect->quoting != QUOTE_NONE) {
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diff changeset
593 /* start quoted field */
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diff changeset
594 self->state = IN_QUOTED_FIELD;
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diff changeset
595 }
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diff changeset
596 else if (c == dialect->escapechar) {
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parents: 51271
diff changeset
597 /* possible escaped character */
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diff changeset
598 self->state = ESCAPED_CHAR;
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diff changeset
599 }
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diff changeset
600 else if (c == ' ' && dialect->skipinitialspace)
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parents: 51271
diff changeset
601 /* ignore space at start of field */
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parents: 51271
diff changeset
602 ;
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diff changeset
603 else if (c == dialect->delimiter) {
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parents: 51271
diff changeset
604 /* save empty field */
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parents: 51271
diff changeset
605 if (parse_save_field(self) < 0)
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diff changeset
606 return -1;
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parents: 51271
diff changeset
607 }
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diff changeset
608 else {
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diff changeset
609 /* begin new unquoted field */
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diff changeset
610 if (dialect->quoting == QUOTE_NONNUMERIC)
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diff changeset
611 self->numeric_field = 1;
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diff changeset
612 if (parse_add_char(self, c) < 0)
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diff changeset
613 return -1;
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diff changeset
614 self->state = IN_FIELD;
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diff changeset
615 }
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diff changeset
616 break;
28339
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diff changeset
617
61467
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618 case ESCAPED_CHAR:
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619 if (c == '\0')
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620 c = '\n';
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621 if (parse_add_char(self, c) < 0)
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622 return -1;
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diff changeset
623 self->state = IN_FIELD;
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624 break;
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625
61467
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diff changeset
626 case IN_FIELD:
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diff changeset
627 /* in unquoted field */
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diff changeset
628 if (c == '\n' || c == '\r' || c == '\0') {
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diff changeset
629 /* end of line - return [fields] */
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630 if (parse_save_field(self) < 0)
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631 return -1;
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diff changeset
632 self->state = (c == '\0' ? START_RECORD : EAT_CRNL);
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633 }
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634 else if (c == dialect->escapechar) {
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diff changeset
635 /* possible escaped character */
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diff changeset
636 self->state = ESCAPED_CHAR;
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diff changeset
637 }
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diff changeset
638 else if (c == dialect->delimiter) {
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parents: 51271
diff changeset
639 /* save field - wait for new field */
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diff changeset
640 if (parse_save_field(self) < 0)
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diff changeset
641 return -1;
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diff changeset
642 self->state = START_FIELD;
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diff changeset
643 }
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diff changeset
644 else {
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diff changeset
645 /* normal character - save in field */
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diff changeset
646 if (parse_add_char(self, c) < 0)
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647 return -1;
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diff changeset
648 }
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diff changeset
649 break;
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650
61467
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diff changeset
651 case IN_QUOTED_FIELD:
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652 /* in quoted field */
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653 if (c == '\0')
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654 ;
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655 else if (c == dialect->escapechar) {
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diff changeset
656 /* Possible escape character */
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diff changeset
657 self->state = ESCAPE_IN_QUOTED_FIELD;
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diff changeset
658 }
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659 else if (c == dialect->quotechar &&
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660 dialect->quoting != QUOTE_NONE) {
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diff changeset
661 if (dialect->doublequote) {
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diff changeset
662 /* doublequote; " represented by "" */
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diff changeset
663 self->state = QUOTE_IN_QUOTED_FIELD;
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diff changeset
664 }
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diff changeset
665 else {
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666 /* end of quote part of field */
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diff changeset
667 self->state = IN_FIELD;
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diff changeset
668 }
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diff changeset
669 }
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670 else {
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671 /* normal character - save in field */
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672 if (parse_add_char(self, c) < 0)
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673 return -1;
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diff changeset
674 }
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diff changeset
675 break;
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parents:
diff changeset
676
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
677 case ESCAPE_IN_QUOTED_FIELD:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
678 if (c == '\0')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
679 c = '\n';
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
680 if (parse_add_char(self, c) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
681 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
682 self->state = IN_QUOTED_FIELD;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
683 break;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
684
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
685 case QUOTE_IN_QUOTED_FIELD:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
686 /* doublequote - seen a quote in an quoted field */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
687 if (dialect->quoting != QUOTE_NONE &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
688 c == dialect->quotechar) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
689 /* save "" as " */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
690 if (parse_add_char(self, c) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
691 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
692 self->state = IN_QUOTED_FIELD;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
693 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
694 else if (c == dialect->delimiter) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
695 /* save field - wait for new field */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
696 if (parse_save_field(self) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
697 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
698 self->state = START_FIELD;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
699 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
700 else if (c == '\n' || c == '\r' || c == '\0') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
701 /* end of line - return [fields] */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
702 if (parse_save_field(self) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
703 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
704 self->state = (c == '\0' ? START_RECORD : EAT_CRNL);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
705 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
706 else if (!dialect->strict) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
707 if (parse_add_char(self, c) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
708 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
709 self->state = IN_FIELD;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
710 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
711 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
712 /* illegal */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
713 PyErr_Format(error_obj, "'%c' expected after '%c'",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
714 dialect->delimiter,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
715 dialect->quotechar);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
716 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
717 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
718 break;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
719
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
720 case EAT_CRNL:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
721 if (c == '\n' || c == '\r')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
722 ;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
723 else if (c == '\0')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
724 self->state = START_RECORD;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
725 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
726 PyErr_Format(error_obj, "new-line character seen in unquoted field - do you need to open the file in universal-newline mode?");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
727 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
728 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
729 break;
34418
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
730
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
731 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
732 return 0;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
733 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
734
34418
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
735 static int
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
736 parse_reset(ReaderObj *self)
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
737 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
738 Py_XDECREF(self->fields);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
739 self->fields = PyList_New(0);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
740 if (self->fields == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
741 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
742 self->field_len = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
743 self->state = START_RECORD;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
744 self->numeric_field = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
745 return 0;
34418
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
746 }
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
747
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
748 static PyObject *
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
749 Reader_iternext(ReaderObj *self)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
750 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
751 PyObject *lineobj;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
752 PyObject *fields = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
753 Py_UNICODE *line, c;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
754 Py_ssize_t linelen;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
755
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
756 if (parse_reset(self) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
757 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
758 do {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
759 lineobj = PyIter_Next(self->input_iter);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
760 if (lineobj == NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
761 /* End of input OR exception */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
762 if (!PyErr_Occurred() && self->field_len != 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
763 PyErr_Format(error_obj,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
764 "newline inside string");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
765 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
766 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
767 if (!PyUnicode_Check(lineobj)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
768 PyErr_Format(error_obj,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
769 "iterator should return strings, "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
770 "not %.200s "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
771 "(did you open the file in text mode?)",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
772 lineobj->ob_type->tp_name
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
773 );
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
774 Py_DECREF(lineobj);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
775 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
776 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
777 ++self->line_num;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
778 line = PyUnicode_AsUnicode(lineobj);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
779 linelen = PyUnicode_GetSize(lineobj);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
780 if (line == NULL || linelen < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
781 Py_DECREF(lineobj);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
782 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
783 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
784 while (linelen--) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
785 c = *line++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
786 if (c == '\0') {
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
787 Py_DECREF(lineobj);
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
788 PyErr_Format(error_obj,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
789 "line contains NULL byte");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
790 goto err;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
791 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
792 if (parse_process_char(self, c) < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
793 Py_DECREF(lineobj);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
794 goto err;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
795 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
796 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
797 Py_DECREF(lineobj);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
798 if (parse_process_char(self, 0) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
799 goto err;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
800 } while (self->state != START_RECORD);
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
801
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
802 fields = self->fields;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
803 self->fields = NULL;
34418
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34411
diff changeset
804 err:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
805 return fields;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
806 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
807
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
808 static void
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
809 Reader_dealloc(ReaderObj *self)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
810 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
811 PyObject_GC_UnTrack(self);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
812 Py_XDECREF(self->dialect);
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813 Py_XDECREF(self->input_iter);
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814 Py_XDECREF(self->fields);
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815 if (self->field != NULL)
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816 PyMem_Free(self->field);
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diff changeset
817 PyObject_GC_Del(self);
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818 }
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819
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820 static int
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diff changeset
821 Reader_traverse(ReaderObj *self, visitproc visit, void *arg)
11660f4361f8 Make readers and writers participate in garbage collection.
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822 {
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823 Py_VISIT(self->dialect);
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824 Py_VISIT(self->input_iter);
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825 Py_VISIT(self->fields);
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826 return 0;
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827 }
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828
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829 static int
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830 Reader_clear(ReaderObj *self)
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831 {
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832 Py_CLEAR(self->dialect);
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833 Py_CLEAR(self->input_iter);
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834 Py_CLEAR(self->fields);
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835 return 0;
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836 }
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837
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838 PyDoc_STRVAR(Reader_Type_doc,
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839 "CSV reader\n"
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840 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
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841 "Reader objects are responsible for reading and parsing tabular data\n"
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842 "in CSV format.\n"
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843 );
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844
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845 static struct PyMethodDef Reader_methods[] = {
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846 { NULL, NULL }
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847 };
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diff changeset
848 #define R_OFF(x) offsetof(ReaderObj, x)
fa65e3425a4c Moved reader \r and \n processing from the iterator to the state machine -
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849
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850 static struct PyMemberDef Reader_memberlist[] = {
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851 { "dialect", T_OBJECT, R_OFF(dialect), READONLY },
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852 { "line_num", T_ULONG, R_OFF(line_num), READONLY },
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853 { NULL }
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854 };
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855
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856
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857 static PyTypeObject Reader_Type = {
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858 PyVarObject_HEAD_INIT(NULL, 0)
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859 "_csv.reader", /*tp_name*/
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860 sizeof(ReaderObj), /*tp_basicsize*/
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861 0, /*tp_itemsize*/
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862 /* methods */
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863 (destructor)Reader_dealloc, /*tp_dealloc*/
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864 (printfunc)0, /*tp_print*/
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865 (getattrfunc)0, /*tp_getattr*/
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866 (setattrfunc)0, /*tp_setattr*/
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867 0, /*tp_reserved*/
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868 (reprfunc)0, /*tp_repr*/
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869 0, /*tp_as_number*/
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870 0, /*tp_as_sequence*/
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871 0, /*tp_as_mapping*/
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872 (hashfunc)0, /*tp_hash*/
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873 (ternaryfunc)0, /*tp_call*/
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874 (reprfunc)0, /*tp_str*/
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875 0, /*tp_getattro*/
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876 0, /*tp_setattro*/
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877 0, /*tp_as_buffer*/
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878 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
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879 Py_TPFLAGS_HAVE_GC, /*tp_flags*/
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880 Reader_Type_doc, /*tp_doc*/
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881 (traverseproc)Reader_traverse, /*tp_traverse*/
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882 (inquiry)Reader_clear, /*tp_clear*/
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883 0, /*tp_richcompare*/
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884 0, /*tp_weaklistoffset*/
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885 PyObject_SelfIter, /*tp_iter*/
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886 (getiterfunc)Reader_iternext, /*tp_iternext*/
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887 Reader_methods, /*tp_methods*/
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888 Reader_memberlist, /*tp_members*/
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889 0, /*tp_getset*/
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890
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891 };
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Skip Montanaro <skip@pobox.com>
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892
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Skip Montanaro <skip@pobox.com>
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893 static PyObject *
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Skip Montanaro <skip@pobox.com>
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894 csv_reader(PyObject *module, PyObject *args, PyObject *keyword_args)
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
895 {
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896 PyObject * iterator, * dialect = NULL;
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897 ReaderObj * self = PyObject_GC_New(ReaderObj, &Reader_Type);
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Skip Montanaro <skip@pobox.com>
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898
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899 if (!self)
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900 return NULL;
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901
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902 self->dialect = NULL;
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903 self->fields = NULL;
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904 self->input_iter = NULL;
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905 self->field = NULL;
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906 self->field_size = 0;
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907 self->line_num = 0;
34409
1d866c02a8ca When quoting=QUOTE_NONNUMERIC, the reader now casts unquoted fields
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34408
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908
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909 if (parse_reset(self) < 0) {
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910 Py_DECREF(self);
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911 return NULL;
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912 }
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913
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914 if (!PyArg_UnpackTuple(args, "", 1, 2, &iterator, &dialect)) {
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915 Py_DECREF(self);
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916 return NULL;
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917 }
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918 self->input_iter = PyObject_GetIter(iterator);
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919 if (self->input_iter == NULL) {
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920 PyErr_SetString(PyExc_TypeError,
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921 "argument 1 must be an iterator");
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922 Py_DECREF(self);
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923 return NULL;
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924 }
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925 self->dialect = (DialectObj *)_call_dialect(dialect, keyword_args);
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926 if (self->dialect == NULL) {
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927 Py_DECREF(self);
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928 return NULL;
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929 }
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930
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931 PyObject_GC_Track(self);
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932 return (PyObject *)self;
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933 }
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Skip Montanaro <skip@pobox.com>
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934
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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935 /*
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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936 * WRITER
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Skip Montanaro <skip@pobox.com>
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937 */
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Skip Montanaro <skip@pobox.com>
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938 /* ---------------------------------------------------------------- */
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Skip Montanaro <skip@pobox.com>
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939 static void
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Skip Montanaro <skip@pobox.com>
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940 join_reset(WriterObj *self)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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941 {
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942 self->rec_len = 0;
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943 self->num_fields = 0;
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944 }
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945
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Skip Montanaro <skip@pobox.com>
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946 #define MEM_INCR 32768
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947
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948 /* Calculate new record length or append field to record. Return new
cc35ed2b26a8 new CSV file processing module - see PEP 305
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949 * record length.
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950 */
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951 static int
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952 join_append_data(WriterObj *self, Py_UNICODE *field, int quote_empty,
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953 int *quoted, int copy_phase)
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954 {
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955 DialectObj *dialect = self->dialect;
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956 int i;
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957 int rec_len;
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958 Py_UNICODE *lineterm;
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959
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960 #define ADDCH(c) \
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961 do {\
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962 if (copy_phase) \
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963 self->rec[rec_len] = c;\
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964 rec_len++;\
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965 } while(0)
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966
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967 lineterm = PyUnicode_AsUnicode(dialect->lineterminator);
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968 if (lineterm == NULL)
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969 return -1;
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970
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971 rec_len = self->rec_len;
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972
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973 /* If this is not the first field we need a field separator */
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974 if (self->num_fields > 0)
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975 ADDCH(dialect->delimiter);
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976
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977 /* Handle preceding quote */
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978 if (copy_phase && *quoted)
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979 ADDCH(dialect->quotechar);
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980
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981 /* Copy/count field data */
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982 /* If field is null just pass over */
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983 for (i = 0; field; i++) {
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984 Py_UNICODE c = field[i];
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985 int want_escape = 0;
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986
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987 if (c == '\0')
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988 break;
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989
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990 if (c == dialect->delimiter ||
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991 c == dialect->escapechar ||
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992 c == dialect->quotechar ||
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993 Py_UNICODE_strchr(lineterm, c)) {
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994 if (dialect->quoting == QUOTE_NONE)
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995 want_escape = 1;
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996 else {
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997 if (c == dialect->quotechar) {
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998 if (dialect->doublequote)
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999 ADDCH(dialect->quotechar);
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1000 else
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1001 want_escape = 1;
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1002 }
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1003 if (!want_escape)
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1004 *quoted = 1;
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1005 }
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1006 if (want_escape) {
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1007 if (!dialect->escapechar) {
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1008 PyErr_Format(error_obj,
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1009 "need to escape, but no escapechar set");
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1010 return -1;
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1011 }
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1012 ADDCH(dialect->escapechar);
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1013 }
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1014 }
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1015 /* Copy field character into record buffer.
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1016 */
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1017 ADDCH(c);
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1018 }
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1019
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1020 /* If field is empty check if it needs to be quoted.
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1021 */
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1022 if (i == 0 && quote_empty) {
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1023 if (dialect->quoting == QUOTE_NONE) {
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1024 PyErr_Format(error_obj,
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1025 "single empty field record must be quoted");
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1026 return -1;
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1027 }
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1028 else
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1029 *quoted = 1;
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1030 }
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1031
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1032 if (*quoted) {
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1033 if (copy_phase)
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1034 ADDCH(dialect->quotechar);
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1035 else
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1036 rec_len += 2;
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1037 }
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1038 return rec_len;
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1039 #undef ADDCH
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1040 }
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1041
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1042 static int
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1043 join_check_rec_size(WriterObj *self, int rec_len)
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1044 {
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1045
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1046 if (rec_len < 0 || rec_len > INT_MAX - MEM_INCR) {
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1047 PyErr_NoMemory();
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1048 return 0;
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1049 }
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1050
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1051 if (rec_len > self->rec_size) {
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1052 if (self->rec_size == 0) {
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1053 self->rec_size = (rec_len / MEM_INCR + 1) * MEM_INCR;
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1054 if (self->rec != NULL)
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1055 PyMem_Free(self->rec);
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1056 self->rec = PyMem_New(Py_UNICODE, self->rec_size);
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1057 }
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1058 else {
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1059 Py_UNICODE* old_rec = self->rec;
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1060
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1061 self->rec_size = (rec_len / MEM_INCR + 1) * MEM_INCR;
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1062 self->rec = PyMem_Resize(self->rec, Py_UNICODE,
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1063 self->rec_size);
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1064 if (self->rec == NULL)
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1065 PyMem_Free(old_rec);
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1066 }
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1067 if (self->rec == NULL) {
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1068 PyErr_NoMemory();
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1069 return 0;
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1070 }
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1071 }
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1072 return 1;
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1073 }
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1074
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1075 static int
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1076 join_append(WriterObj *self, Py_UNICODE *field, int *quoted, int quote_empty)
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1077 {
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1078 int rec_len;
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1079
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1080 rec_len = join_append_data(self, field, quote_empty, quoted, 0);
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1081 if (rec_len < 0)
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1082 return 0;
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1083
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1084 /* grow record buffer if necessary */
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diff changeset
1085 if (!join_check_rec_size(self, rec_len))
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diff changeset
1086 return 0;
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parents:
diff changeset
1087
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diff changeset
1088 self->rec_len = join_append_data(self, field, quote_empty, quoted, 1);
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diff changeset
1089 self->num_fields++;
28339
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Skip Montanaro <skip@pobox.com>
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diff changeset
1090
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diff changeset
1091 return 1;
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cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1092 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1093
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1094 static int
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1095 join_append_lineterminator(WriterObj *self)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1096 {
61467
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diff changeset
1097 int terminator_len;
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diff changeset
1098 Py_UNICODE *terminator;
28339
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diff changeset
1099
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diff changeset
1100 terminator_len = PyUnicode_GetSize(self->dialect->lineterminator);
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1101 if (terminator_len == -1)
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diff changeset
1102 return 0;
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cc35ed2b26a8 new CSV file processing module - see PEP 305
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parents:
diff changeset
1103
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1104 /* grow record buffer if necessary */
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diff changeset
1105 if (!join_check_rec_size(self, self->rec_len + terminator_len))
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diff changeset
1106 return 0;
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cc35ed2b26a8 new CSV file processing module - see PEP 305
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parents:
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1107
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1108 terminator = PyUnicode_AsUnicode(self->dialect->lineterminator);
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1109 if (terminator == NULL)
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1110 return 0;
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1111 memmove(self->rec + self->rec_len, terminator,
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1112 sizeof(Py_UNICODE)*terminator_len);
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diff changeset
1113 self->rec_len += terminator_len;
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1114
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1115 return 1;
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cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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1116 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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1117
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
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1118 PyDoc_STRVAR(csv_writerow_doc,
28590
95b6dd04da8f add writerows docstring
Skip Montanaro <skip@pobox.com>
parents: 28589
diff changeset
1119 "writerow(sequence)\n"
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1120 "\n"
28590
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Skip Montanaro <skip@pobox.com>
parents: 28589
diff changeset
1121 "Construct and write a CSV record from a sequence of fields. Non-string\n"
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1122 "elements will be converted to string.");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
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1123
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1124 static PyObject *
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1125 csv_writerow(WriterObj *self, PyObject *seq)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1126 {
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1127 DialectObj *dialect = self->dialect;
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diff changeset
1128 int len, i;
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1129
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1130 if (!PySequence_Check(seq))
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diff changeset
1131 return PyErr_Format(error_obj, "sequence expected");
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parents:
diff changeset
1132
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1133 len = PySequence_Length(seq);
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1134 if (len < 0)
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1135 return NULL;
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diff changeset
1136
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1137 /* Join all fields in internal buffer.
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diff changeset
1138 */
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diff changeset
1139 join_reset(self);
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diff changeset
1140 for (i = 0; i < len; i++) {
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diff changeset
1141 PyObject *field;
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1142 int append_ok;
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diff changeset
1143 int quoted;
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1144
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1145 field = PySequence_GetItem(seq, i);
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diff changeset
1146 if (field == NULL)
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1147 return NULL;
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Skip Montanaro <skip@pobox.com>
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diff changeset
1148
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diff changeset
1149 switch (dialect->quoting) {
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diff changeset
1150 case QUOTE_NONNUMERIC:
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diff changeset
1151 quoted = !PyNumber_Check(field);
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diff changeset
1152 break;
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diff changeset
1153 case QUOTE_ALL:
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diff changeset
1154 quoted = 1;
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diff changeset
1155 break;
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diff changeset
1156 default:
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diff changeset
1157 quoted = 0;
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diff changeset
1158 break;
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1159 }
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1160
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1161 if (PyUnicode_Check(field)) {
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1162 append_ok = join_append(self,
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diff changeset
1163 PyUnicode_AS_UNICODE(field),
42462
8b45f2297dbd SF patch# 1767398 by Adam Hupp.
Guido van Rossum <guido@python.org>
parents: 42455
diff changeset
1164 &quoted, len == 1);
61467
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1165 Py_DECREF(field);
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1166 }
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1167 else if (field == Py_None) {
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diff changeset
1168 append_ok = join_append(self, NULL,
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diff changeset
1169 &quoted, len == 1);
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diff changeset
1170 Py_DECREF(field);
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diff changeset
1171 }
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1172 else {
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diff changeset
1173 PyObject *str;
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1174
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1175 str = PyObject_Str(field);
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1176 Py_DECREF(field);
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1177 if (str == NULL)
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1178 return NULL;
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1179 append_ok = join_append(self,
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1180 PyUnicode_AS_UNICODE(str),
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1181 &quoted, len == 1);
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1182 Py_DECREF(str);
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1183 }
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1184 if (!append_ok)
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1185 return NULL;
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1186 }
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1187
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1188 /* Add line terminator.
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1189 */
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1190 if (!join_append_lineterminator(self))
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1191 return 0;
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1192
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1193 return PyObject_CallFunction(self->writeline,
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1194 "(u#)", self->rec,
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1195 self->rec_len);
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Skip Montanaro <skip@pobox.com>
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1196 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1197
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1198 PyDoc_STRVAR(csv_writerows_doc,
95b6dd04da8f add writerows docstring
Skip Montanaro <skip@pobox.com>
parents: 28589
diff changeset
1199 "writerows(sequence of sequences)\n"
95b6dd04da8f add writerows docstring
Skip Montanaro <skip@pobox.com>
parents: 28589
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1200 "\n"
95b6dd04da8f add writerows docstring
Skip Montanaro <skip@pobox.com>
parents: 28589
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1201 "Construct and write a series of sequences to a csv file. Non-string\n"
95b6dd04da8f add writerows docstring
Skip Montanaro <skip@pobox.com>
parents: 28589
diff changeset
1202 "elements will be converted to string.");
95b6dd04da8f add writerows docstring
Skip Montanaro <skip@pobox.com>
parents: 28589
diff changeset
1203
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1204 static PyObject *
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1205 csv_writerows(WriterObj *self, PyObject *seqseq)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1206 {
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1207 PyObject *row_iter, *row_obj, *result;
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1208
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1209 row_iter = PyObject_GetIter(seqseq);
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1210 if (row_iter == NULL) {
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1211 PyErr_SetString(PyExc_TypeError,
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1212 "writerows() argument must be iterable");
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1213 return NULL;
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1214 }
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1215 while ((row_obj = PyIter_Next(row_iter))) {
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1216 result = csv_writerow(self, row_obj);
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1217 Py_DECREF(row_obj);
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1218 if (!result) {
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1219 Py_DECREF(row_iter);
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1220 return NULL;
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parents:
diff changeset
1221 }
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diff changeset
1222 else
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diff changeset
1223 Py_DECREF(result);
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diff changeset
1224 }
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diff changeset
1225 Py_DECREF(row_iter);
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diff changeset
1226 if (PyErr_Occurred())
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diff changeset
1227 return NULL;
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diff changeset
1228 Py_INCREF(Py_None);
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diff changeset
1229 return Py_None;
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diff changeset
1230 }
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1231
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1232 static struct PyMethodDef Writer_methods[] = {
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1233 { "writerow", (PyCFunction)csv_writerow, METH_O, csv_writerow_doc},
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1234 { "writerows", (PyCFunction)csv_writerows, METH_O, csv_writerows_doc},
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1235 { NULL, NULL }
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Skip Montanaro <skip@pobox.com>
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1236 };
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Skip Montanaro <skip@pobox.com>
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diff changeset
1237
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Skip Montanaro <skip@pobox.com>
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diff changeset
1238 #define W_OFF(x) offsetof(WriterObj, x)
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1239
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Skip Montanaro <skip@pobox.com>
parents:
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1240 static struct PyMemberDef Writer_memberlist[] = {
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1241 { "dialect", T_OBJECT, W_OFF(dialect), READONLY },
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1242 { NULL }
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cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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1243 };
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Skip Montanaro <skip@pobox.com>
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diff changeset
1244
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Skip Montanaro <skip@pobox.com>
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1245 static void
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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diff changeset
1246 Writer_dealloc(WriterObj *self)
cc35ed2b26a8 new CSV file processing module - see PEP 305
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1247 {
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1248 PyObject_GC_UnTrack(self);
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1249 Py_XDECREF(self->dialect);
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1250 Py_XDECREF(self->writeline);
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1251 if (self->rec != NULL)
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1252 PyMem_Free(self->rec);
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1253 PyObject_GC_Del(self);
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Jeremy Hylton <jeremy@alum.mit.edu>
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1254 }
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Jeremy Hylton <jeremy@alum.mit.edu>
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1255
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1256 static int
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1257 Writer_traverse(WriterObj *self, visitproc visit, void *arg)
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1258 {
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1259 Py_VISIT(self->dialect);
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1260 Py_VISIT(self->writeline);
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1261 return 0;
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1262 }
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1263
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1264 static int
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1265 Writer_clear(WriterObj *self)
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1266 {
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1267 Py_CLEAR(self->dialect);
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1268 Py_CLEAR(self->writeline);
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1269 return 0;
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1270 }
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1271
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1272 PyDoc_STRVAR(Writer_Type_doc,
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1273 "CSV writer\n"
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1274 "\n"
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1275 "Writer objects are responsible for generating tabular data\n"
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1276 "in CSV format from sequence input.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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1277 );
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1278
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1279 static PyTypeObject Writer_Type = {
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1280 PyVarObject_HEAD_INIT(NULL, 0)
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1281 "_csv.writer", /*tp_name*/
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1282 sizeof(WriterObj), /*tp_basicsize*/
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1283 0, /*tp_itemsize*/
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1284 /* methods */
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1285 (destructor)Writer_dealloc, /*tp_dealloc*/
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1286 (printfunc)0, /*tp_print*/
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1287 (getattrfunc)0, /*tp_getattr*/
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1288 (setattrfunc)0, /*tp_setattr*/
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1289 0, /*tp_reserved*/
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1290 (reprfunc)0, /*tp_repr*/
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1291 0, /*tp_as_number*/
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1292 0, /*tp_as_sequence*/
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1293 0, /*tp_as_mapping*/
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1294 (hashfunc)0, /*tp_hash*/
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1295 (ternaryfunc)0, /*tp_call*/
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1296 (reprfunc)0, /*tp_str*/
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1297 0, /*tp_getattro*/
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diff changeset
1298 0, /*tp_setattro*/
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diff changeset
1299 0, /*tp_as_buffer*/
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1300 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
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1301 Py_TPFLAGS_HAVE_GC, /*tp_flags*/
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1302 Writer_Type_doc,
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1303 (traverseproc)Writer_traverse, /*tp_traverse*/
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1304 (inquiry)Writer_clear, /*tp_clear*/
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1305 0, /*tp_richcompare*/
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1306 0, /*tp_weaklistoffset*/
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1307 (getiterfunc)0, /*tp_iter*/
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1308 (getiterfunc)0, /*tp_iternext*/
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diff changeset
1309 Writer_methods, /*tp_methods*/
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diff changeset
1310 Writer_memberlist, /*tp_members*/
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1311 0, /*tp_getset*/
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1312 };
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1313
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Skip Montanaro <skip@pobox.com>
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1314 static PyObject *
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1315 csv_writer(PyObject *module, PyObject *args, PyObject *keyword_args)
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1316 {
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1317 PyObject * output_file, * dialect = NULL;
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1318 WriterObj * self = PyObject_GC_New(WriterObj, &Writer_Type);
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1319
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1320 if (!self)
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1321 return NULL;
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1322
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1323 self->dialect = NULL;
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1324 self->writeline = NULL;
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1325
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1326 self->rec = NULL;
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1327 self->rec_size = 0;
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1328 self->rec_len = 0;
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1329 self->num_fields = 0;
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1330
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1331 if (!PyArg_UnpackTuple(args, "", 1, 2, &output_file, &dialect)) {
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1332 Py_DECREF(self);
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1333 return NULL;
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1334 }
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1335 self->writeline = PyObject_GetAttrString(output_file, "write");
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1336 if (self->writeline == NULL || !PyCallable_Check(self->writeline)) {
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1337 PyErr_SetString(PyExc_TypeError,
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1338 "argument 1 must have a \"write\" method");
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1339 Py_DECREF(self);
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1340 return NULL;
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1341 }
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1342 self->dialect = (DialectObj *)_call_dialect(dialect, keyword_args);
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1343 if (self->dialect == NULL) {
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1344 Py_DECREF(self);
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1345 return NULL;
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1346 }
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1347 PyObject_GC_Track(self);
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1348 return (PyObject *)self;
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1349 }
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1350
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1351 /*
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1352 * DIALECT REGISTRY
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1353 */
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1354 static PyObject *
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1355 csv_list_dialects(PyObject *module, PyObject *args)
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1356 {
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1357 return PyDict_Keys(dialects);
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1358 }
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Skip Montanaro <skip@pobox.com>
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diff changeset
1359
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Skip Montanaro <skip@pobox.com>
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1360 static PyObject *
34391
0a1608a5eb05 Allow dialect-describing keywords to be supplied to register_dialect,
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34390
diff changeset
1361 csv_register_dialect(PyObject *module, PyObject *args, PyObject *kwargs)
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1362 {
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1363 PyObject *name_obj, *dialect_obj = NULL;
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1364 PyObject *dialect;
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1365
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1366 if (!PyArg_UnpackTuple(args, "", 1, 2, &name_obj, &dialect_obj))
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1367 return NULL;
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1368 if (!IS_BASESTRING(name_obj)) {
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1369 PyErr_SetString(PyExc_TypeError,
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diff changeset
1370 "dialect name must be a string or unicode");
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1371 return NULL;
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1372 }
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1373 dialect = _call_dialect(dialect_obj, kwargs);
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diff changeset
1374 if (dialect == NULL)
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1375 return NULL;
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1376 if (PyDict_SetItem(dialects, name_obj, dialect) < 0) {
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diff changeset
1377 Py_DECREF(dialect);
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1378 return NULL;
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1379 }
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1380 Py_DECREF(dialect);
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diff changeset
1381 Py_INCREF(Py_None);
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diff changeset
1382 return Py_None;
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1383 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1384
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1385 static PyObject *
28591
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parents: 28590
diff changeset
1386 csv_unregister_dialect(PyObject *module, PyObject *name_obj)
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1387 {
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1388 if (PyDict_DelItem(dialects, name_obj) < 0)
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parents: 51271
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1389 return PyErr_Format(error_obj, "unknown dialect");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1390 Py_INCREF(Py_None);
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1391 return Py_None;
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1392 }
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1393
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1394 static PyObject *
28591
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Skip Montanaro <skip@pobox.com>
parents: 28590
diff changeset
1395 csv_get_dialect(PyObject *module, PyObject *name_obj)
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1396 {
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diff changeset
1397 return get_dialect_from_registry(name_obj);
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1398 }
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1399
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Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1400 static PyObject *
34406
b93845ce4454 Rename csv.set_field_limit to csv.field_size_limit (since it both sets and
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34403
diff changeset
1401 csv_field_size_limit(PyObject *module, PyObject *args)
34396
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1402 {
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1403 PyObject *new_limit = NULL;
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parents: 51271
diff changeset
1404 long old_limit = field_limit;
34396
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Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1405
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diff changeset
1406 if (!PyArg_UnpackTuple(args, "field_size_limit", 0, 1, &new_limit))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1407 return NULL;
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diff changeset
1408 if (new_limit != NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1409 if (!PyLong_CheckExact(new_limit)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1410 PyErr_Format(PyExc_TypeError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1411 "limit must be an integer");
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diff changeset
1412 return NULL;
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diff changeset
1413 }
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diff changeset
1414 field_limit = PyLong_AsLong(new_limit);
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parents: 51271
diff changeset
1415 if (field_limit == -1 && PyErr_Occurred()) {
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parents: 51271
diff changeset
1416 field_limit = old_limit;
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diff changeset
1417 return NULL;
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parents: 51271
diff changeset
1418 }
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diff changeset
1419 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1420 return PyLong_FromLong(old_limit);
34396
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Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1421 }
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1422
28339
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Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1423 /*
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1424 * MODULE
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1425 */
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1426
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1427 PyDoc_STRVAR(csv_module_doc,
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1428 "CSV parsing and writing.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1429 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1430 "This module provides classes that assist in the reading and writing\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1431 "of Comma Separated Value (CSV) files, and implements the interface\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1432 "described by PEP 305. Although many CSV files are simple to parse,\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1433 "the format is not formally defined by a stable specification and\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1434 "is subtle enough that parsing lines of a CSV file with something\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1435 "like line.split(\",\") is bound to fail. The module supports three\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1436 "basic APIs: reading, writing, and registration of dialects.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1437 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1438 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1439 "DIALECT REGISTRATION:\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1440 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1441 "Readers and writers support a dialect argument, which is a convenient\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1442 "handle on a group of settings. When the dialect argument is a string,\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1443 "it identifies one of the dialects previously registered with the module.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1444 "If it is a class or instance, the attributes of the argument are used as\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1445 "the settings for the reader or writer:\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1446 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1447 " class excel:\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1448 " delimiter = ','\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1449 " quotechar = '\"'\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1450 " escapechar = None\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1451 " doublequote = True\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1452 " skipinitialspace = False\n"
33134
fc1637fc4588 Quote \r\n correctly, remove random indentation (patch #1009384). Thanks
Johannes Gijsbers <jlg@dds.nl>
parents: 32389
diff changeset
1453 " lineterminator = '\\r\\n'\n"
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1454 " quoting = QUOTE_MINIMAL\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1455 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1456 "SETTINGS:\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1457 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1458 " * quotechar - specifies a one-character string to use as the \n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1459 " quoting character. It defaults to '\"'.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1460 " * delimiter - specifies a one-character string to use as the \n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1461 " field separator. It defaults to ','.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1462 " * skipinitialspace - specifies how to interpret whitespace which\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1463 " immediately follows a delimiter. It defaults to False, which\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1464 " means that whitespace immediately following a delimiter is part\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1465 " of the following field.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1466 " * lineterminator - specifies the character sequence which should \n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1467 " terminate rows.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1468 " * quoting - controls when quotes should be generated by the writer.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1469 " It can take on any of the following module constants:\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1470 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1471 " csv.QUOTE_MINIMAL means only when required, for example, when a\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1472 " field contains either the quotechar or the delimiter\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1473 " csv.QUOTE_ALL means that quotes are always placed around fields.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1474 " csv.QUOTE_NONNUMERIC means that quotes are always placed around\n"
31074
48695c839d98 doc nit
Skip Montanaro <skip@pobox.com>
parents: 29389
diff changeset
1475 " fields which do not parse as integers or floating point\n"
48695c839d98 doc nit
Skip Montanaro <skip@pobox.com>
parents: 29389
diff changeset
1476 " numbers.\n"
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1477 " csv.QUOTE_NONE means that quotes are never placed around fields.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1478 " * escapechar - specifies a one-character string used to escape \n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1479 " the delimiter when quoting is set to QUOTE_NONE.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1480 " * doublequote - controls the handling of quotes inside fields. When\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1481 " True, two consecutive quotes are interpreted as one during read,\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1482 " and when writing, each quote character embedded in the data is\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1483 " written as two quotes\n");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1484
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1485 PyDoc_STRVAR(csv_reader_doc,
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1486 " csv_reader = reader(iterable [, dialect='excel']\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1487 " [optional keyword args])\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1488 " for row in csv_reader:\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1489 " process(row)\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1490 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1491 "The \"iterable\" argument can be any object that returns a line\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1492 "of input for each iteration, such as a file object or a list. The\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1493 "optional \"dialect\" parameter is discussed below. The function\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1494 "also accepts optional keyword arguments which override settings\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1495 "provided by the dialect.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1496 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1497 "The returned object is an iterator. Each iteration returns a row\n"
33134
fc1637fc4588 Quote \r\n correctly, remove random indentation (patch #1009384). Thanks
Johannes Gijsbers <jlg@dds.nl>
parents: 32389
diff changeset
1498 "of the CSV file (which can span multiple input lines):\n");
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1499
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1500 PyDoc_STRVAR(csv_writer_doc,
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1501 " csv_writer = csv.writer(fileobj [, dialect='excel']\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1502 " [optional keyword args])\n"
37879
f731859e9b3b Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents: 37144
diff changeset
1503 " for row in sequence:\n"
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1504 " csv_writer.writerow(row)\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1505 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1506 " [or]\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1507 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1508 " csv_writer = csv.writer(fileobj [, dialect='excel']\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1509 " [optional keyword args])\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1510 " csv_writer.writerows(rows)\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1511 "\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1512 "The \"fileobj\" argument can be any object that supports the file API.\n");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1513
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1514 PyDoc_STRVAR(csv_list_dialects_doc,
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1515 "Return a list of all know dialect names.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1516 " names = csv.list_dialects()");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1517
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1518 PyDoc_STRVAR(csv_get_dialect_doc,
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1519 "Return the dialect instance associated with name.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1520 " dialect = csv.get_dialect(name)");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1521
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1522 PyDoc_STRVAR(csv_register_dialect_doc,
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1523 "Create a mapping from a string name to a dialect class.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1524 " dialect = csv.register_dialect(name, dialect)");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1525
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1526 PyDoc_STRVAR(csv_unregister_dialect_doc,
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1527 "Delete the name/dialect mapping associated with a string name.\n"
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1528 " csv.unregister_dialect(name)");
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1529
34406
b93845ce4454 Rename csv.set_field_limit to csv.field_size_limit (since it both sets and
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34403
diff changeset
1530 PyDoc_STRVAR(csv_field_size_limit_doc,
34396
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1531 "Sets an upper limit on parsed fields.\n"
34406
b93845ce4454 Rename csv.set_field_limit to csv.field_size_limit (since it both sets and
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34403
diff changeset
1532 " csv.field_size_limit([limit])\n"
34396
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1533 "\n"
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1534 "Returns old limit. If limit is not given, no new limit is set and\n"
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1535 "the old limit is returned");
7059fb8b9eb3 Set an upper limit on the size of the field buffer, raise an exception
Andrew McNamara <andrewm@object-craft.com.au>
parents: 34395
diff changeset
1536
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1537 static struct PyMethodDef csv_methods[] = {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1538 { "reader", (PyCFunction)csv_reader,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1539 METH_VARARGS | METH_KEYWORDS, csv_reader_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1540 { "writer", (PyCFunction)csv_writer,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1541 METH_VARARGS | METH_KEYWORDS, csv_writer_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1542 { "list_dialects", (PyCFunction)csv_list_dialects,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1543 METH_NOARGS, csv_list_dialects_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1544 { "register_dialect", (PyCFunction)csv_register_dialect,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1545 METH_VARARGS | METH_KEYWORDS, csv_register_dialect_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1546 { "unregister_dialect", (PyCFunction)csv_unregister_dialect,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1547 METH_O, csv_unregister_dialect_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1548 { "get_dialect", (PyCFunction)csv_get_dialect,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1549 METH_O, csv_get_dialect_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1550 { "field_size_limit", (PyCFunction)csv_field_size_limit,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1551 METH_VARARGS, csv_field_size_limit_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1552 { NULL, NULL }
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1553 };
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1554
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 44351
diff changeset
1555
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 44351
diff changeset
1556 static struct PyModuleDef _csvmodule = {
61467
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diff changeset
1557 PyModuleDef_HEAD_INIT,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1558 "_csv",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1559 csv_module_doc,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1560 -1,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1561 csv_methods,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1562 NULL,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1563 NULL,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1564 NULL,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1565 NULL
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 44351
diff changeset
1566 };
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 44351
diff changeset
1567
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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diff changeset
1568 PyMODINIT_FUNC
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 44351
diff changeset
1569 PyInit__csv(void)
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1570 {
61467
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diff changeset
1571 PyObject *module;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1572 StyleDesc *style;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1573
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1574 if (PyType_Ready(&Dialect_Type) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1575 return NULL;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1576
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1577 if (PyType_Ready(&Reader_Type) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 51271
diff changeset
1578 return NULL;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
parents:
diff changeset
1579
61467
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diff changeset
1580 if (PyType_Ready(&Writer_Type) < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 51271
diff changeset
1581 return NULL;
28339
cc35ed2b26a8 new CSV file processing module - see PEP 305
Skip Montanaro <skip@pobox.com>
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diff changeset
1582
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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1583 /* Create the module and add the functions */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1584 module = PyModule_Create(&_csvmodule);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1585 if (module == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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1586 return NULL;
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diff changeset
1587
61467
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1588 /* Add version to the module. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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1589 if (PyModule_AddStringConstant(module, "__version__",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1590 MODULE_VERSION) == -1)
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diff changeset
1591 return NULL;
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diff changeset
1592
61467
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1593 /* Add _dialects dictionary */
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diff changeset
1594 dialects = PyDict_New();
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diff changeset
1595 if (dialects == NULL)
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1596 return NULL;
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1597 if (PyModule_AddObject(module, "_dialects", dialects))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1598 return NULL;
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diff changeset
1599
61467
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1600 /* Add quote styles into dictionary */
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1601 for (style = quote_styles; style->name; style++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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1602 if (PyModule_AddIntConstant(module, style->name,
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1603 style->style) == -1)
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1604 return NULL;
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1605 }
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1606
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1607 /* Add the Dialect type */
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1608 Py_INCREF(&Dialect_Type);
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1609 if (PyModule_AddObject(module, "Dialect", (PyObject *)&Dialect_Type))
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1610 return NULL;
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1611
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1612 /* Add the CSV exception object to the module. */
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1613 error_obj = PyErr_NewException("_csv.Error", NULL, NULL);
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1614 if (error_obj == NULL)
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1615 return NULL;
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1616 PyModule_AddObject(module, "Error", error_obj);
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1617 return module;
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1618 }