Mercurial > cpython-lru_cache-weakref

annotate Modules/bsddbmodule.c @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Berkeley DB interface.
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2 Author: Michael McLay
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3 Hacked: Guido van Rossum
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4 Btree and Recno additions plus sequence methods: David Ely
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5 Hacked by Gustavo Niemeyer <niemeyer@conectiva.com> fixing recno
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6 support.
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7
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8 XXX To do:
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9 - provide a way to access the various hash functions
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10 - support more open flags
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11
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12 The windows port of the Berkeley DB code is hard to find on the web:
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13 www.nightmare.com/software.html
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14 */
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15
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16 #include "Python.h"
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17 #ifdef WITH_THREAD
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18 #include "pythread.h"
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19 #endif
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20
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21 #include <sys/types.h>
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22 #include <sys/stat.h>
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23 #include <fcntl.h>
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24 #ifdef HAVE_DB_185_H
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25 #include <db_185.h>
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26 #else
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27 #include <db.h>
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28 #endif
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29 /* Please don't include internal header files of the Berkeley db package
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30 (it messes up the info required in the Setup file) */
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31
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32 typedef struct {
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33 PyObject_HEAD
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34 DB *di_bsddb;
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35 int di_size; /* -1 means recompute */
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36 int di_type;
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37 #ifdef WITH_THREAD
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38 PyThread_type_lock di_lock;
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39 #endif
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40 } bsddbobject;
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41
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42 static PyTypeObject Bsddbtype;
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43
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44 #define is_bsddbobject(v) ((v)->ob_type == &Bsddbtype)
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45 #define check_bsddbobject_open(v, r) if ((v)->di_bsddb == NULL) \
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46 { PyErr_SetString(BsddbError, \
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47 "BSDDB object has already been closed"); \
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48 return r; }
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49
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50 static PyObject *BsddbError;
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51
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52 static PyObject *
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53 newdbhashobject(char *file, int flags, int mode,
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54 int bsize, int ffactor, int nelem, int cachesize,
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55 int hash, int lorder)
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56 {
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57 bsddbobject *dp;
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58 HASHINFO info;
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59
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60 if ((dp = PyObject_New(bsddbobject, &Bsddbtype)) == NULL)
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61 return NULL;
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62
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63 info.bsize = bsize;
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64 info.ffactor = ffactor;
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65 info.nelem = nelem;
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66 info.cachesize = cachesize;
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67 info.hash = NULL; /* XXX should derive from hash argument */
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68 info.lorder = lorder;
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69
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70 #ifdef O_BINARY
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71 flags |= O_BINARY;
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72 #endif
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73 Py_BEGIN_ALLOW_THREADS
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74 dp->di_bsddb = dbopen(file, flags, mode, DB_HASH, &info);
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75 Py_END_ALLOW_THREADS
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76 if (dp->di_bsddb == NULL) {
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77 PyErr_SetFromErrno(BsddbError);
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78 #ifdef WITH_THREAD
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79 dp->di_lock = NULL;
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80 #endif
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81 Py_DECREF(dp);
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82 return NULL;
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83 }
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84
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85 dp->di_size = -1;
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86 dp->di_type = DB_HASH;
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87
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88 #ifdef WITH_THREAD
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89 dp->di_lock = PyThread_allocate_lock();
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90 if (dp->di_lock == NULL) {
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91 PyErr_SetString(BsddbError, "can't allocate lock");
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92 Py_DECREF(dp);
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93 return NULL;
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94 }
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95 #endif
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96
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97 return (PyObject *)dp;
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98 }
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99
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100 static PyObject *
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101 newdbbtobject(char *file, int flags, int mode,
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102 int btflags, int cachesize, int maxkeypage,
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103 int minkeypage, int psize, int lorder)
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104 {
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105 bsddbobject *dp;
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106 BTREEINFO info;
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107
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108 if ((dp = PyObject_New(bsddbobject, &Bsddbtype)) == NULL)
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109 return NULL;
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110
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111 info.flags = btflags;
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112 info.cachesize = cachesize;
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113 info.maxkeypage = maxkeypage;
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114 info.minkeypage = minkeypage;
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115 info.psize = psize;
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116 info.lorder = lorder;
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117 info.compare = 0; /* Use default comparison functions, for now..*/
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118 info.prefix = 0;
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119
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120 #ifdef O_BINARY
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121 flags |= O_BINARY;
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122 #endif
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123 Py_BEGIN_ALLOW_THREADS
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124 dp->di_bsddb = dbopen(file, flags, mode, DB_BTREE, &info);
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125 Py_END_ALLOW_THREADS
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126 if (dp->di_bsddb == NULL) {
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127 PyErr_SetFromErrno(BsddbError);
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128 #ifdef WITH_THREAD
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129 dp->di_lock = NULL;
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130 #endif
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131 Py_DECREF(dp);
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132 return NULL;
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133 }
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134
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135 dp->di_size = -1;
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136 dp->di_type = DB_BTREE;
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137
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138 #ifdef WITH_THREAD
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139 dp->di_lock = PyThread_allocate_lock();
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140 if (dp->di_lock == NULL) {
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141 PyErr_SetString(BsddbError, "can't allocate lock");
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142 Py_DECREF(dp);
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143 return NULL;
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144 }
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145 #endif
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146
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147 return (PyObject *)dp;
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148 }
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149
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150 static PyObject *
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151 newdbrnobject(char *file, int flags, int mode,
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152 int rnflags, int cachesize, int psize, int lorder,
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153 size_t reclen, u_char bval, char *bfname)
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154 {
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155 bsddbobject *dp;
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156 RECNOINFO info;
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157 int fd;
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158
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159 if ((dp = PyObject_New(bsddbobject, &Bsddbtype)) == NULL)
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160 return NULL;
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161
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162 info.flags = rnflags;
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163 info.cachesize = cachesize;
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164 info.psize = psize;
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165 info.lorder = lorder;
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166 info.reclen = reclen;
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167 info.bval = bval;
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168 info.bfname = bfname;
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169
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170 #ifdef O_BINARY
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171 flags |= O_BINARY;
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172 #endif
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173 /* This is a hack to avoid a dbopen() bug that happens when
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174 * it fails. */
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175 fd = open(file, flags);
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176 if (fd == -1) {
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177 dp->di_bsddb = NULL;
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178 }
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179 else {
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180 close(fd);
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181 Py_BEGIN_ALLOW_THREADS
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182 dp->di_bsddb = dbopen(file, flags, mode, DB_RECNO, &info);
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183 Py_END_ALLOW_THREADS
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184 }
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185 if (dp->di_bsddb == NULL) {
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186 PyErr_SetFromErrno(BsddbError);
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187 #ifdef WITH_THREAD
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188 dp->di_lock = NULL;
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189 #endif
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190 Py_DECREF(dp);
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191 return NULL;
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192 }
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193
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194 dp->di_size = -1;
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195 dp->di_type = DB_RECNO;
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196
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197 #ifdef WITH_THREAD
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198 dp->di_lock = PyThread_allocate_lock();
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199 if (dp->di_lock == NULL) {
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200 PyErr_SetString(BsddbError, "can't allocate lock");
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201 Py_DECREF(dp);
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202 return NULL;
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203 }
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204 #endif
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205
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206 return (PyObject *)dp;
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207 }
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208
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209 static void
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210 bsddb_dealloc(bsddbobject *dp)
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211 {
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212 #ifdef WITH_THREAD
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213 if (dp->di_lock) {
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214 PyThread_acquire_lock(dp->di_lock, 0);
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215 PyThread_release_lock(dp->di_lock);
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216 PyThread_free_lock(dp->di_lock);
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217 dp->di_lock = NULL;
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218 }
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219 #endif
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220 if (dp->di_bsddb != NULL) {
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221 int status;
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222 Py_BEGIN_ALLOW_THREADS
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223 status = (dp->di_bsddb->close)(dp->di_bsddb);
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224 Py_END_ALLOW_THREADS
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225 if (status != 0)
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226 fprintf(stderr,
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227 "Python bsddb: close errno %d in dealloc\n",
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228 errno);
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229 }
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230 PyObject_Del(dp);
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231 }
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232
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233 #ifdef WITH_THREAD
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234 #define BSDDB_BGN_SAVE(_dp) \
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235 Py_BEGIN_ALLOW_THREADS PyThread_acquire_lock(_dp->di_lock,1);
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236 #define BSDDB_END_SAVE(_dp) \
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237 PyThread_release_lock(_dp->di_lock); Py_END_ALLOW_THREADS
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238 #else
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239 #define BSDDB_BGN_SAVE(_dp) Py_BEGIN_ALLOW_THREADS
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240 #define BSDDB_END_SAVE(_dp) Py_END_ALLOW_THREADS
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241 #endif
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242
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243 static Py_ssize_t
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244 bsddb_length(bsddbobject *dp)
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245 {
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246 check_bsddbobject_open(dp, -1);
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247 if (dp->di_size < 0) {
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248 DBT krec, drec;
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249 int status;
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250 int size = 0;
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251 BSDDB_BGN_SAVE(dp)
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252 for (status = (dp->di_bsddb->seq)(dp->di_bsddb,
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253 &krec, &drec,R_FIRST);
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254 status == 0;
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255 status = (dp->di_bsddb->seq)(dp->di_bsddb,
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256 &krec, &drec, R_NEXT))
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257 size++;
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258 BSDDB_END_SAVE(dp)
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259 if (status < 0) {
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260 PyErr_SetFromErrno(BsddbError);
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261 return -1;
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262 }
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263 dp->di_size = size;
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264 }
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265 return dp->di_size;
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266 }
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267
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268 static PyObject *
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269 bsddb_subscript(bsddbobject *dp, PyObject *key)
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270 {
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271 int status;
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272 DBT krec, drec;
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273 char *data = NULL;
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274 char buf[4096];
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275 int size;
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276 PyObject *result;
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277 recno_t recno;
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278
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279 if (dp->di_type == DB_RECNO) {
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280 if (!PyArg_Parse(key, "i", &recno)) {
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281 PyErr_SetString(PyExc_TypeError,
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282 "key type must be integer");
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283 return NULL;
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284 }
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285 krec.data = &recno;
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286 krec.size = sizeof(recno);
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287 }
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288 else {
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289 if (!PyArg_Parse(key, "s#", &data, &size)) {
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290 PyErr_SetString(PyExc_TypeError,
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291 "key type must be string");
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292 return NULL;
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293 }
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294 krec.data = data;
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295 krec.size = size;
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296 }
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297 check_bsddbobject_open(dp, NULL);
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298
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299 BSDDB_BGN_SAVE(dp)
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300 status = (dp->di_bsddb->get)(dp->di_bsddb, &krec, &drec, 0);
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301 if (status == 0) {
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302 if (drec.size > sizeof(buf)) data = malloc(drec.size);
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303 else data = buf;
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304 if (data!=NULL) memcpy(data,drec.data,drec.size);
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305 }
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306 BSDDB_END_SAVE(dp)
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307 if (data==NULL) return PyErr_NoMemory();
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308 if (status != 0) {
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309 if (status < 0)
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310 PyErr_SetFromErrno(BsddbError);
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311 else
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312 PyErr_SetObject(PyExc_KeyError, key);
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313 return NULL;
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314 }
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315
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316 result = PyString_FromStringAndSize(data, (int)drec.size);
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317 if (data != buf) free(data);
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318 return result;
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319 }
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320
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321 static int
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322 bsddb_ass_sub(bsddbobject *dp, PyObject *key, PyObject *value)
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323 {
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324 int status;
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325 DBT krec, drec;
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326 char *data;
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327 int size;
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328 recno_t recno;
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329
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330 if (dp->di_type == DB_RECNO) {
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331 if (!PyArg_Parse(key, "i", &recno)) {
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332 PyErr_SetString(PyExc_TypeError,
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333 "bsddb key type must be integer");
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334 return -1;
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335 }
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336 krec.data = &recno;
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337 krec.size = sizeof(recno);
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338 }
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339 else {
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340 if (!PyArg_Parse(key, "s#", &data, &size)) {
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341 PyErr_SetString(PyExc_TypeError,
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342 "bsddb key type must be string");
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343 return -1;
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344 }
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345 krec.data = data;
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346 krec.size = size;
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347 }
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348 check_bsddbobject_open(dp, -1);
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349 dp->di_size = -1;
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350 if (value == NULL) {
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351 BSDDB_BGN_SAVE(dp)
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352 status = (dp->di_bsddb->del)(dp->di_bsddb, &krec, 0);
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353 BSDDB_END_SAVE(dp)
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354 }
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355 else {
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356 if (!PyArg_Parse(value, "s#", &data, &size)) {
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357 PyErr_SetString(PyExc_TypeError,
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358 "bsddb value type must be string");
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359 return -1;
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360 }
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361 drec.data = data;
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362 drec.size = size;
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363 BSDDB_BGN_SAVE(dp)
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364 status = (dp->di_bsddb->put)(dp->di_bsddb, &krec, &drec, 0);
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365 BSDDB_END_SAVE(dp)
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366 }
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367 if (status != 0) {
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368 if (status < 0)
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369 PyErr_SetFromErrno(BsddbError);
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370 else
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371 PyErr_SetObject(PyExc_KeyError, key);
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372 return -1;
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373 }
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374 return 0;
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375 }
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376
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377 static PyMappingMethods bsddb_as_mapping = {
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378 (lenfunc)bsddb_length, /*mp_length*/
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379 (binaryfunc)bsddb_subscript, /*mp_subscript*/
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380 (objobjargproc)bsddb_ass_sub, /*mp_ass_subscript*/
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381 };
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382
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383 static PyObject *
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384 bsddb_close(bsddbobject *dp)
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385 {
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386 if (dp->di_bsddb != NULL) {
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387 int status;
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388 BSDDB_BGN_SAVE(dp)
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389 status = (dp->di_bsddb->close)(dp->di_bsddb);
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390 BSDDB_END_SAVE(dp)
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391 if (status != 0) {
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392 dp->di_bsddb = NULL;
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393 PyErr_SetFromErrno(BsddbError);
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394 return NULL;
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395 }
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396 }
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397 dp->di_bsddb = NULL;
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398 Py_INCREF(Py_None);
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399 return Py_None;
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400 }
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401
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402 static PyObject *
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403 bsddb_keys(bsddbobject *dp)
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404 {
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405 PyObject *list, *item=NULL;
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406 DBT krec, drec;
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407 char *data=NULL,buf[4096];
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408 int status;
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409 int err;
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410
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411 check_bsddbobject_open(dp, NULL);
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412 list = PyList_New(0);
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413 if (list == NULL)
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414 return NULL;
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415 BSDDB_BGN_SAVE(dp)
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416 status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, R_FIRST);
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417 if (status == 0) {
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418 if (krec.size > sizeof(buf)) data = malloc(krec.size);
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419 else data = buf;
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420 if (data != NULL) memcpy(data,krec.data,krec.size);
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421 }
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422 BSDDB_END_SAVE(dp)
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423 if (status == 0 && data==NULL) return PyErr_NoMemory();
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424 while (status == 0) {
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425 if (dp->di_type == DB_RECNO)
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426 item = PyInt_FromLong(*((int*)data));
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427 else
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428 item = PyString_FromStringAndSize(data,
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429 (int)krec.size);
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430 if (data != buf) free(data);
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431 if (item == NULL) {
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432 Py_DECREF(list);
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433 return NULL;
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434 }
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435 err = PyList_Append(list, item);
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436 Py_DECREF(item);
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437 if (err != 0) {
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438 Py_DECREF(list);
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439 return NULL;
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440 }
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441 BSDDB_BGN_SAVE(dp)
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442 status = (dp->di_bsddb->seq)
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443 (dp->di_bsddb, &krec, &drec, R_NEXT);
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444 if (status == 0) {
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445 if (krec.size > sizeof(buf))
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446 data = malloc(krec.size);
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447 else data = buf;
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448 if (data != NULL)
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449 memcpy(data,krec.data,krec.size);
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450 }
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451 BSDDB_END_SAVE(dp)
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452 if (data == NULL) return PyErr_NoMemory();
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453 }
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454 if (status < 0) {
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455 PyErr_SetFromErrno(BsddbError);
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456 Py_DECREF(list);
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457 return NULL;
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458 }
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459 if (dp->di_size < 0)
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460 dp->di_size = PyList_Size(list); /* We just did the work */
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461 return list;
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462 }
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463
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464 static PyObject *
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465 bsddb_has_key(bsddbobject *dp, PyObject *args)
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466 {
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467 DBT krec, drec;
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468 int status;
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469 char *data;
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470 int size;
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471 recno_t recno;
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472
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473 if (dp->di_type == DB_RECNO) {
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474 if (!PyArg_ParseTuple(args, "i;key type must be integer",
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475 &recno)) {
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476 return NULL;
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477 }
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478 krec.data = &recno;
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479 krec.size = sizeof(recno);
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480 }
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481 else {
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482 if (!PyArg_ParseTuple(args, "s#;key type must be string",
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483 &data, &size)) {
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484 return NULL;
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485 }
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486 krec.data = data;
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487 krec.size = size;
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488 }
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489 check_bsddbobject_open(dp, NULL);
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490
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491 BSDDB_BGN_SAVE(dp)
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492 status = (dp->di_bsddb->get)(dp->di_bsddb, &krec, &drec, 0);
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493 BSDDB_END_SAVE(dp)
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494 if (status < 0) {
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495 PyErr_SetFromErrno(BsddbError);
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496 return NULL;
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497 }
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498
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499 return PyInt_FromLong(status == 0);
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500 }
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501
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502 static PyObject *
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503 bsddb_set_location(bsddbobject *dp, PyObject *key)
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504 {
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505 int status;
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506 DBT krec, drec;
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507 char *data = NULL;
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508 char buf[4096];
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509 int size;
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510 PyObject *result;
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511 recno_t recno;
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512
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513 if (dp->di_type == DB_RECNO) {
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514 if (!PyArg_ParseTuple(key, "i;key type must be integer",
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515 &recno)) {
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516 return NULL;
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517 }
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518 krec.data = &recno;
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519 krec.size = sizeof(recno);
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520 }
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521 else {
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522 if (!PyArg_ParseTuple(key, "s#;key type must be string",
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523 &data, &size)) {
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524 return NULL;
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525 }
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526 krec.data = data;
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527 krec.size = size;
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528 }
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529 check_bsddbobject_open(dp, NULL);
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530
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531 BSDDB_BGN_SAVE(dp)
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532 status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, R_CURSOR);
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533 if (status == 0) {
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534 if (drec.size > sizeof(buf)) data = malloc(drec.size);
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535 else data = buf;
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536 if (data!=NULL) memcpy(data,drec.data,drec.size);
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537 }
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538 BSDDB_END_SAVE(dp)
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539 if (data==NULL) return PyErr_NoMemory();
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540 if (status != 0) {
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541 if (status < 0)
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542 PyErr_SetFromErrno(BsddbError);
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543 else
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544 PyErr_SetObject(PyExc_KeyError, key);
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545 return NULL;
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546 }
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547
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548 if (dp->di_type == DB_RECNO)
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549 result = Py_BuildValue("is#", *((int*)krec.data),
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550 data, drec.size);
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551 else
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552 result = Py_BuildValue("s#s#", krec.data, krec.size,
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553 data, drec.size);
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554 if (data != buf) free(data);
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555 return result;
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556 }
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557
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558 static PyObject *
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559 bsddb_seq(bsddbobject *dp, int sequence_request)
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560 {
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561 int status;
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562 DBT krec, drec;
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563 char *kdata=NULL,kbuf[4096];
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564 char *ddata=NULL,dbuf[4096];
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565 PyObject *result;
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566
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567 check_bsddbobject_open(dp, NULL);
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568 krec.data = 0;
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569 krec.size = 0;
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570
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571 BSDDB_BGN_SAVE(dp)
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572 status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec,
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573 &drec, sequence_request);
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574 if (status == 0) {
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575 if (krec.size > sizeof(kbuf)) kdata = malloc(krec.size);
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576 else kdata = kbuf;
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577 if (kdata != NULL) memcpy(kdata,krec.data,krec.size);
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578 if (drec.size > sizeof(dbuf)) ddata = malloc(drec.size);
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579 else ddata = dbuf;
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580 if (ddata != NULL) memcpy(ddata,drec.data,drec.size);
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581 }
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582 BSDDB_END_SAVE(dp)
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583 if (status == 0) {
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584 if ((kdata == NULL) || (ddata == NULL))
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585 return PyErr_NoMemory();
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586 }
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587 else {
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588 /* (status != 0) */
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589 if (status < 0)
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590 PyErr_SetFromErrno(BsddbError);
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591 else
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592 PyErr_SetString(PyExc_KeyError, "no key/data pairs");
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593 return NULL;
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594 }
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595
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596 if (dp->di_type == DB_RECNO)
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597 result = Py_BuildValue("is#", *((int*)kdata),
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598 ddata, drec.size);
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599 else
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600 result = Py_BuildValue("s#s#", kdata, krec.size,
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601 ddata, drec.size);
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602 if (kdata != kbuf) free(kdata);
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603 if (ddata != dbuf) free(ddata);
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604 return result;
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605 }
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606
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607 static PyObject *
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608 bsddb_next(bsddbobject *dp)
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609 {
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610 return bsddb_seq(dp, R_NEXT);
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611 }
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612 static PyObject *
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613 bsddb_previous(bsddbobject *dp)
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614 {
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615 return bsddb_seq(dp, R_PREV);
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616 }
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617 static PyObject *
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618 bsddb_first(bsddbobject *dp)
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619 {
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620 return bsddb_seq(dp, R_FIRST);
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621 }
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622 static PyObject *
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623 bsddb_last(bsddbobject *dp)
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624 {
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625 return bsddb_seq(dp, R_LAST);
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626 }
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627 static PyObject *
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628 bsddb_sync(bsddbobject *dp)
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629 {
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630 int status;
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631
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632 check_bsddbobject_open(dp, NULL);
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633 BSDDB_BGN_SAVE(dp)
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634 status = (dp->di_bsddb->sync)(dp->di_bsddb, 0);
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635 BSDDB_END_SAVE(dp)
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636 if (status != 0) {
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637 PyErr_SetFromErrno(BsddbError);
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638 return NULL;
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639 }
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640 return PyInt_FromLong(0);
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641 }
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642 static PyMethodDef bsddb_methods[] = {
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643 {"close", (PyCFunction)bsddb_close, METH_NOARGS},
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644 {"keys", (PyCFunction)bsddb_keys, METH_NOARGS},
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645 {"has_key", (PyCFunction)bsddb_has_key, METH_VARARGS},
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646 {"set_location", (PyCFunction)bsddb_set_location, METH_VARARGS},
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647 {"next", (PyCFunction)bsddb_next, METH_NOARGS},
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648 {"previous", (PyCFunction)bsddb_previous, METH_NOARGS},
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649 {"first", (PyCFunction)bsddb_first, METH_NOARGS},
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650 {"last", (PyCFunction)bsddb_last, METH_NOARGS},
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651 {"sync", (PyCFunction)bsddb_sync, METH_NOARGS},
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652 {NULL, NULL} /* sentinel */
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653 };
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654
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655 static PyObject *
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656 bsddb_getattr(PyObject *dp, char *name)
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657 {
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658 return Py_FindMethod(bsddb_methods, dp, name);
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659 }
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660
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661 static PyTypeObject Bsddbtype = {
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662 PyObject_HEAD_INIT(NULL)
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663 0,
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664 "bsddb.bsddb",
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665 sizeof(bsddbobject),
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666 0,
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667 (destructor)bsddb_dealloc, /*tp_dealloc*/
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668 0, /*tp_print*/
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669 (getattrfunc)bsddb_getattr, /*tp_getattr*/
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670 0, /*tp_setattr*/
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671 0, /*tp_compare*/
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672 0, /*tp_repr*/
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673 0, /*tp_as_number*/
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674 0, /*tp_as_sequence*/
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675 &bsddb_as_mapping, /*tp_as_mapping*/
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676 };
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677
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678 static PyObject *
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679 bsdhashopen(PyObject *self, PyObject *args)
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680 {
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681 char *file;
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682 char *flag = NULL;
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683 int flags = O_RDONLY;
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684 int mode = 0666;
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685 int bsize = 0;
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686 int ffactor = 0;
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687 int nelem = 0;
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688 int cachesize = 0;
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689 int hash = 0; /* XXX currently ignored */
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690 int lorder = 0;
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691
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692 if (!PyArg_ParseTuple(args, "z|siiiiiii:hashopen",
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693 &file, &flag, &mode,
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694 &bsize, &ffactor, &nelem, &cachesize,
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695 &hash, &lorder))
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696 return NULL;
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697 if (flag != NULL) {
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698 /* XXX need to pass O_EXCL, O_EXLOCK, O_NONBLOCK, O_SHLOCK */
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699 if (flag[0] == 'r')
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700 flags = O_RDONLY;
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701 else if (flag[0] == 'w')
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702 flags = O_RDWR;
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703 else if (flag[0] == 'c')
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704 flags = O_RDWR|O_CREAT;
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705 else if (flag[0] == 'n')
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706 flags = O_RDWR|O_CREAT|O_TRUNC;
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707 else {
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708 PyErr_SetString(BsddbError,
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709 "Flag should begin with 'r', 'w', 'c' or 'n'");
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710 return NULL;
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711 }
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712 if (flag[1] == 'l') {
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713 #if defined(O_EXLOCK) && defined(O_SHLOCK)
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714 if (flag[0] == 'r')
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715 flags |= O_SHLOCK;
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716 else
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717 flags |= O_EXLOCK;
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718 #else
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719 PyErr_SetString(BsddbError,
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720 "locking not supported on this platform");
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721 return NULL;
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722 #endif
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723 }
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724 }
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725 return newdbhashobject(file, flags, mode,
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726 bsize, ffactor, nelem, cachesize, hash, lorder);
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727 }
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728
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729 static PyObject *
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730 bsdbtopen(PyObject *self, PyObject *args)
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731 {
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732 char *file;
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733 char *flag = NULL;
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734 int flags = O_RDONLY;
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735 int mode = 0666;
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736 int cachesize = 0;
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737 int maxkeypage = 0;
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738 int minkeypage = 0;
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739 int btflags = 0;
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740 unsigned int psize = 0;
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741 int lorder = 0;
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742
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743 if (!PyArg_ParseTuple(args, "z|siiiiiii:btopen",
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744 &file, &flag, &mode,
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745 &btflags, &cachesize, &maxkeypage, &minkeypage,
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746 &psize, &lorder))
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747 return NULL;
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748 if (flag != NULL) {
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749 /* XXX need to pass O_EXCL, O_EXLOCK, O_NONBLOCK, O_SHLOCK */
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750 if (flag[0] == 'r')
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751 flags = O_RDONLY;
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752 else if (flag[0] == 'w')
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753 flags = O_RDWR;
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754 else if (flag[0] == 'c')
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755 flags = O_RDWR|O_CREAT;
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756 else if (flag[0] == 'n')
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757 flags = O_RDWR|O_CREAT|O_TRUNC;
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758 else {
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759 PyErr_SetString(BsddbError,
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760 "Flag should begin with 'r', 'w', 'c' or 'n'");
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761 return NULL;
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762 }
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763 if (flag[1] == 'l') {
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764 #if defined(O_EXLOCK) && defined(O_SHLOCK)
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765 if (flag[0] == 'r')
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766 flags |= O_SHLOCK;
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767 else
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768 flags |= O_EXLOCK;
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769 #else
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770 PyErr_SetString(BsddbError,
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771 "locking not supported on this platform");
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772 return NULL;
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773 #endif
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774 }
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775 }
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776 return newdbbtobject(file, flags, mode,
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777 btflags, cachesize, maxkeypage, minkeypage,
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778 psize, lorder);
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779 }
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780
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781 static PyObject *
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782 bsdrnopen(PyObject *self, PyObject *args)
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783 {
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784 char *file;
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785 char *flag = NULL;
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786 int flags = O_RDONLY;
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787 int mode = 0666;
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788 int cachesize = 0;
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diff changeset
789 int rnflags = 0;
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790 unsigned int psize = 0;
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791 int lorder = 0;
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792 size_t reclen = 0;
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793 char *bval = "";
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794 char *bfname = NULL;
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795
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796 if (!PyArg_ParseTuple(args, "z|siiiiiiss:rnopen",
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797 &file, &flag, &mode,
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798 &rnflags, &cachesize, &psize, &lorder,
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799 &reclen, &bval, &bfname))
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800 return NULL;
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801
61465
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802 if (flag != NULL) {
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803 /* XXX need to pass O_EXCL, O_EXLOCK, O_NONBLOCK, O_SHLOCK */
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804 if (flag[0] == 'r')
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805 flags = O_RDONLY;
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806 else if (flag[0] == 'w')
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807 flags = O_RDWR;
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808 else if (flag[0] == 'c')
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809 flags = O_RDWR|O_CREAT;
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810 else if (flag[0] == 'n')
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811 flags = O_RDWR|O_CREAT|O_TRUNC;
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812 else {
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813 PyErr_SetString(BsddbError,
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814 "Flag should begin with 'r', 'w', 'c' or 'n'");
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815 return NULL;
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816 }
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817 if (flag[1] == 'l') {
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818 #if defined(O_EXLOCK) && defined(O_SHLOCK)
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819 if (flag[0] == 'r')
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820 flags |= O_SHLOCK;
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821 else
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822 flags |= O_EXLOCK;
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823 #else
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824 PyErr_SetString(BsddbError,
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825 "locking not supported on this platform");
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826 return NULL;
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827 #endif
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828 }
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829 else if (flag[1] != '\0') {
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830 PyErr_SetString(BsddbError,
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831 "Flag char 2 should be 'l' or absent");
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832 return NULL;
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833 }
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834 }
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835 return newdbrnobject(file, flags, mode, rnflags, cachesize,
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836 psize, lorder, reclen, bval[0], bfname);
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837 }
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838
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839 static PyMethodDef bsddbmodule_methods[] = {
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840 {"hashopen", (PyCFunction)bsdhashopen, METH_VARARGS},
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841 {"btopen", (PyCFunction)bsdbtopen, METH_VARARGS},
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842 {"rnopen", (PyCFunction)bsdrnopen, METH_VARARGS},
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843 /* strictly for use by dbhhash!!! */
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844 {"open", (PyCFunction)bsdhashopen, METH_VARARGS},
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845 {0, 0},
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846 };
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847
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Mark Hammond <mhammond@skippinet.com.au>
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848 PyMODINIT_FUNC
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Martin v. Löwis <martin@v.loewis.de>
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849 initbsddb185(void) {
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850 PyObject *m, *d;
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851
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852 if (PyErr_WarnPy3k("the bsddb185 module has been removed in "
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853 "Python 3.0", 2) < 0)
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854 return;
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855
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856 Bsddbtype.ob_type = &PyType_Type;
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857 m = Py_InitModule("bsddb185", bsddbmodule_methods);
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858 if (m == NULL)
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859 return;
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860 d = PyModule_GetDict(m);
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861 BsddbError = PyErr_NewException("bsddb.error", NULL, NULL);
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862 if (BsddbError != NULL)
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863 PyDict_SetItemString(d, "error", BsddbError);
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864 }