Mercurial > cpython-lru_cache-weakref

annotate Modules/mmapmodule.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 39efccf7a167
children b1bbe519770b
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1 /*
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2 / Author: Sam Rushing <rushing@nightmare.com>
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3 / Hacked for Unix by AMK
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4 / $Id$
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5
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6 / Modified to support mmap with offset - to map a 'window' of a file
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7 / Author: Yotam Medini yotamm@mellanox.co.il
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8 /
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9 / mmapmodule.cpp -- map a view of a file into memory
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10 /
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11 / todo: need permission flags, perhaps a 'chsize' analog
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12 / not all functions check range yet!!!
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13 /
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14 /
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15 / This version of mmapmodule.c has been changed significantly
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16 / from the original mmapfile.c on which it was based.
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17 / The original version of mmapfile is maintained by Sam at
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18 / ftp://squirl.nightmare.com/pub/python/python-ext.
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19 */
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20
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21 #define PY_SSIZE_T_CLEAN
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22 #include <Python.h>
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23
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24 #ifndef MS_WINDOWS
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25 #define UNIX
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26 # ifdef __APPLE__
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27 # include <fcntl.h>
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28 # endif
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29 #endif
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30
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31 #ifdef MS_WINDOWS
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32 #include <windows.h>
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33 static int
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34 my_getpagesize(void)
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35 {
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36 SYSTEM_INFO si;
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37 GetSystemInfo(&si);
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38 return si.dwPageSize;
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39 }
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40
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41 static int
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42 my_getallocationgranularity (void)
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43 {
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44
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45 SYSTEM_INFO si;
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46 GetSystemInfo(&si);
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47 return si.dwAllocationGranularity;
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48 }
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49
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50 #endif
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51
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52 #ifdef UNIX
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53 #include <sys/mman.h>
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54 #include <sys/stat.h>
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55
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56 #if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
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57 static int
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58 my_getpagesize(void)
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59 {
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60 return sysconf(_SC_PAGESIZE);
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61 }
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62
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63 #define my_getallocationgranularity my_getpagesize
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64 #else
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65 #define my_getpagesize getpagesize
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66 #endif
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67
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68 #endif /* UNIX */
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69
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70 #include <string.h>
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71
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72 #ifdef HAVE_SYS_TYPES_H
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73 #include <sys/types.h>
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74 #endif /* HAVE_SYS_TYPES_H */
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75
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76 /* Prefer MAP_ANONYMOUS since MAP_ANON is deprecated according to man page. */
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77 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
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78 # define MAP_ANONYMOUS MAP_ANON
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79 #endif
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80
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81 static PyObject *mmap_module_error;
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82
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83 typedef enum
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84 {
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85 ACCESS_DEFAULT,
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86 ACCESS_READ,
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87 ACCESS_WRITE,
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88 ACCESS_COPY
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89 } access_mode;
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90
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91 typedef struct {
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92 PyObject_HEAD
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93 char * data;
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94 size_t size;
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95 size_t pos; /* relative to offset */
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96 #ifdef MS_WINDOWS
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97 PY_LONG_LONG offset;
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98 #else
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99 off_t offset;
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100 #endif
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101
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102 #ifdef MS_WINDOWS
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103 HANDLE map_handle;
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104 HANDLE file_handle;
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105 char * tagname;
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106 #endif
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107
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108 #ifdef UNIX
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109 int fd;
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110 #endif
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111
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112 access_mode access;
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113 } mmap_object;
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114
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115
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116 static void
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117 mmap_object_dealloc(mmap_object *m_obj)
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118 {
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119 #ifdef MS_WINDOWS
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120 if (m_obj->data != NULL)
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121 UnmapViewOfFile (m_obj->data);
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122 if (m_obj->map_handle != NULL)
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123 CloseHandle (m_obj->map_handle);
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124 if (m_obj->file_handle != INVALID_HANDLE_VALUE)
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125 CloseHandle (m_obj->file_handle);
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126 if (m_obj->tagname)
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127 PyMem_Free(m_obj->tagname);
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128 #endif /* MS_WINDOWS */
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129
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130 #ifdef UNIX
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131 if (m_obj->fd >= 0)
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132 (void) close(m_obj->fd);
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133 if (m_obj->data!=NULL) {
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134 if (m_obj->access != ACCESS_READ && m_obj->access != ACCESS_COPY)
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135 msync(m_obj->data, m_obj->size, MS_SYNC);
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136 munmap(m_obj->data, m_obj->size);
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137 }
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138 #endif /* UNIX */
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139
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140 Py_TYPE(m_obj)->tp_free((PyObject*)m_obj);
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141 }
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142
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143 static PyObject *
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144 mmap_close_method(mmap_object *self, PyObject *unused)
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145 {
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146 #ifdef MS_WINDOWS
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147 /* For each resource we maintain, we need to check
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148 the value is valid, and if so, free the resource
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149 and set the member value to an invalid value so
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150 the dealloc does not attempt to resource clearing
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151 again.
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152 TODO - should we check for errors in the close operations???
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153 */
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154 if (self->data != NULL) {
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155 UnmapViewOfFile(self->data);
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156 self->data = NULL;
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157 }
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158 if (self->map_handle != NULL) {
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159 CloseHandle(self->map_handle);
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160 self->map_handle = NULL;
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161 }
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162 if (self->file_handle != INVALID_HANDLE_VALUE) {
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163 CloseHandle(self->file_handle);
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164 self->file_handle = INVALID_HANDLE_VALUE;
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165 }
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166 #endif /* MS_WINDOWS */
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167
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168 #ifdef UNIX
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169 if (0 <= self->fd)
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170 (void) close(self->fd);
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171 self->fd = -1;
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172 if (self->data != NULL) {
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173 munmap(self->data, self->size);
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174 self->data = NULL;
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175 }
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176 #endif
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177
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178 Py_INCREF(Py_None);
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179 return Py_None;
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180 }
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181
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182 #ifdef MS_WINDOWS
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183 #define CHECK_VALID(err) \
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184 do { \
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185 if (self->map_handle == NULL) { \
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186 PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \
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187 return err; \
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188 } \
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189 } while (0)
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190 #endif /* MS_WINDOWS */
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191
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192 #ifdef UNIX
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193 #define CHECK_VALID(err) \
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194 do { \
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195 if (self->data == NULL) { \
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196 PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \
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197 return err; \
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198 } \
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199 } while (0)
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200 #endif /* UNIX */
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201
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202 static PyObject *
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203 mmap_read_byte_method(mmap_object *self,
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204 PyObject *unused)
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205 {
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206 CHECK_VALID(NULL);
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207 if (self->pos < self->size) {
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208 char value = self->data[self->pos];
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209 self->pos += 1;
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210 return Py_BuildValue("c", value);
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211 } else {
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212 PyErr_SetString(PyExc_ValueError, "read byte out of range");
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213 return NULL;
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214 }
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215 }
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216
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217 static PyObject *
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218 mmap_read_line_method(mmap_object *self,
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219 PyObject *unused)
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220 {
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221 char *start = self->data+self->pos;
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222 char *eof = self->data+self->size;
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223 char *eol;
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224 PyObject *result;
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225
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226 CHECK_VALID(NULL);
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227
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228 eol = memchr(start, '\n', self->size - self->pos);
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229 if (!eol)
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230 eol = eof;
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231 else
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232 ++eol; /* we're interested in the position after the
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233 newline. */
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234 result = PyString_FromStringAndSize(start, (eol - start));
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235 self->pos += (eol - start);
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236 return result;
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237 }
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238
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239 static PyObject *
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240 mmap_read_method(mmap_object *self,
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241 PyObject *args)
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242 {
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243 Py_ssize_t num_bytes, n;
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244 PyObject *result;
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245
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246 CHECK_VALID(NULL);
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247 if (!PyArg_ParseTuple(args, "n:read", &num_bytes))
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248 return(NULL);
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249
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250 /* silently 'adjust' out-of-range requests */
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251 assert(self->size >= self->pos);
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252 n = self->size - self->pos;
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253 /* The difference can overflow, only if self->size is greater than
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254 * PY_SSIZE_T_MAX. But then the operation cannot possibly succeed,
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255 * because the mapped area and the returned string each need more
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256 * than half of the addressable memory. So we clip the size, and let
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257 * the code below raise MemoryError.
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258 */
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259 if (n < 0)
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260 n = PY_SSIZE_T_MAX;
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261 if (num_bytes < 0 || num_bytes > n) {
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262 num_bytes = n;
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263 }
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264 result = Py_BuildValue("s#", self->data+self->pos, num_bytes);
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265 self->pos += num_bytes;
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266 return result;
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267 }
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268
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269 static PyObject *
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270 mmap_gfind(mmap_object *self,
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271 PyObject *args,
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272 int reverse)
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273 {
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274 Py_ssize_t start = self->pos;
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275 Py_ssize_t end = self->size;
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276 const char *needle;
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277 Py_ssize_t len;
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278
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279 CHECK_VALID(NULL);
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280 if (!PyArg_ParseTuple(args, reverse ? "s#|nn:rfind" : "s#|nn:find",
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281 &needle, &len, &start, &end)) {
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282 return NULL;
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283 } else {
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284 const char *p, *start_p, *end_p;
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285 int sign = reverse ? -1 : 1;
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286
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287 if (start < 0)
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288 start += self->size;
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289 if (start < 0)
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290 start = 0;
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291 else if ((size_t)start > self->size)
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292 start = self->size;
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293
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294 if (end < 0)
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295 end += self->size;
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296 if (end < 0)
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297 end = 0;
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298 else if ((size_t)end > self->size)
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299 end = self->size;
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300
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301 start_p = self->data + start;
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302 end_p = self->data + end;
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303
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304 for (p = (reverse ? end_p - len : start_p);
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305 (p >= start_p) && (p + len <= end_p); p += sign) {
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306 Py_ssize_t i;
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307 for (i = 0; i < len && needle[i] == p[i]; ++i)
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308 /* nothing */;
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309 if (i == len) {
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310 return PyInt_FromSsize_t(p - self->data);
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311 }
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312 }
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313 return PyInt_FromLong(-1);
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314 }
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315 }
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316
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317 static PyObject *
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318 mmap_find_method(mmap_object *self,
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319 PyObject *args)
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320 {
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321 return mmap_gfind(self, args, 0);
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322 }
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323
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324 static PyObject *
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325 mmap_rfind_method(mmap_object *self,
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326 PyObject *args)
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327 {
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328 return mmap_gfind(self, args, 1);
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329 }
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330
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331 static int
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332 is_writeable(mmap_object *self)
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333 {
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334 if (self->access != ACCESS_READ)
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335 return 1;
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336 PyErr_Format(PyExc_TypeError, "mmap can't modify a readonly memory map.");
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337 return 0;
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338 }
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339
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340 static int
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341 is_resizeable(mmap_object *self)
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342 {
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343 if ((self->access == ACCESS_WRITE) || (self->access == ACCESS_DEFAULT))
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344 return 1;
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345 PyErr_Format(PyExc_TypeError,
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346 "mmap can't resize a readonly or copy-on-write memory map.");
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347 return 0;
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348 }
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349
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350
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351 static PyObject *
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352 mmap_write_method(mmap_object *self,
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353 PyObject *args)
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354 {
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355 Py_ssize_t length;
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356 char *data;
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357
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358 CHECK_VALID(NULL);
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359 if (!PyArg_ParseTuple(args, "s#:write", &data, &length))
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360 return(NULL);
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361
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362 if (!is_writeable(self))
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363 return NULL;
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364
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365 if ((self->pos + length) > self->size) {
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366 PyErr_SetString(PyExc_ValueError, "data out of range");
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367 return NULL;
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368 }
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369 memcpy(self->data+self->pos, data, length);
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370 self->pos = self->pos+length;
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371 Py_INCREF(Py_None);
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372 return Py_None;
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373 }
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374
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375 static PyObject *
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376 mmap_write_byte_method(mmap_object *self,
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377 PyObject *args)
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378 {
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379 char value;
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380
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381 CHECK_VALID(NULL);
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382 if (!PyArg_ParseTuple(args, "c:write_byte", &value))
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383 return(NULL);
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384
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385 if (!is_writeable(self))
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386 return NULL;
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387
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388 if (self->pos < self->size) {
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389 *(self->data+self->pos) = value;
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390 self->pos += 1;
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391 Py_INCREF(Py_None);
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392 return Py_None;
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393 }
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394 else {
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395 PyErr_SetString(PyExc_ValueError, "write byte out of range");
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396 return NULL;
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397 }
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398 }
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399
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400 static PyObject *
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401 mmap_size_method(mmap_object *self,
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402 PyObject *unused)
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403 {
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404 CHECK_VALID(NULL);
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405
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406 #ifdef MS_WINDOWS
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407 if (self->file_handle != INVALID_HANDLE_VALUE) {
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408 DWORD low,high;
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409 PY_LONG_LONG size;
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410 low = GetFileSize(self->file_handle, &high);
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411 if (low == INVALID_FILE_SIZE) {
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412 /* It might be that the function appears to have failed,
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413 when indeed its size equals INVALID_FILE_SIZE */
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414 DWORD error = GetLastError();
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415 if (error != NO_ERROR)
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416 return PyErr_SetFromWindowsErr(error);
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417 }
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418 if (!high && low < LONG_MAX)
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419 return PyInt_FromLong((long)low);
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420 size = (((PY_LONG_LONG)high)<<32) + low;
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421 return PyLong_FromLongLong(size);
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422 } else {
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423 return PyInt_FromSsize_t(self->size);
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424 }
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425 #endif /* MS_WINDOWS */
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426
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427 #ifdef UNIX
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428 {
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429 struct stat buf;
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430 if (-1 == fstat(self->fd, &buf)) {
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431 PyErr_SetFromErrno(mmap_module_error);
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432 return NULL;
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433 }
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434 #ifdef HAVE_LARGEFILE_SUPPORT
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435 return PyLong_FromLongLong(buf.st_size);
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436 #else
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437 return PyInt_FromLong(buf.st_size);
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438 #endif
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439 }
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440 #endif /* UNIX */
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441 }
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442
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443 /* This assumes that you want the entire file mapped,
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444 / and when recreating the map will make the new file
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445 / have the new size
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446 /
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447 / Is this really necessary? This could easily be done
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448 / from python by just closing and re-opening with the
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449 / new size?
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450 */
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451
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452 static PyObject *
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453 mmap_resize_method(mmap_object *self,
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454 PyObject *args)
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455 {
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456 Py_ssize_t new_size;
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457 CHECK_VALID(NULL);
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458 if (!PyArg_ParseTuple(args, "n:resize", &new_size) ||
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459 !is_resizeable(self)) {
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460 return NULL;
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461 #ifdef MS_WINDOWS
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462 } else {
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463 DWORD dwErrCode = 0;
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464 DWORD off_hi, off_lo, newSizeLow, newSizeHigh;
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465 /* First, unmap the file view */
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466 UnmapViewOfFile(self->data);
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467 self->data = NULL;
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468 /* Close the mapping object */
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469 CloseHandle(self->map_handle);
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470 self->map_handle = NULL;
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471 /* Move to the desired EOF position */
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472 newSizeHigh = (DWORD)((self->offset + new_size) >> 32);
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473 newSizeLow = (DWORD)((self->offset + new_size) & 0xFFFFFFFF);
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474 off_hi = (DWORD)(self->offset >> 32);
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475 off_lo = (DWORD)(self->offset & 0xFFFFFFFF);
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476 SetFilePointer(self->file_handle,
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477 newSizeLow, &newSizeHigh, FILE_BEGIN);
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478 /* Change the size of the file */
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479 SetEndOfFile(self->file_handle);
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480 /* Create another mapping object and remap the file view */
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481 self->map_handle = CreateFileMapping(
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482 self->file_handle,
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483 NULL,
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484 PAGE_READWRITE,
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485 0,
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486 0,
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487 self->tagname);
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488 if (self->map_handle != NULL) {
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489 self->data = (char *) MapViewOfFile(self->map_handle,
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490 FILE_MAP_WRITE,
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491 off_hi,
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492 off_lo,
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493 new_size);
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494 if (self->data != NULL) {
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495 self->size = new_size;
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496 Py_INCREF(Py_None);
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497 return Py_None;
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498 } else {
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499 dwErrCode = GetLastError();
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500 CloseHandle(self->map_handle);
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501 self->map_handle = NULL;
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502 }
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503 } else {
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504 dwErrCode = GetLastError();
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505 }
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506 PyErr_SetFromWindowsErr(dwErrCode);
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507 return NULL;
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508 #endif /* MS_WINDOWS */
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509
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510 #ifdef UNIX
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511 #ifndef HAVE_MREMAP
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512 } else {
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513 PyErr_SetString(PyExc_SystemError,
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514 "mmap: resizing not available--no mremap()");
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515 return NULL;
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516 #else
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517 } else {
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518 void *newmap;
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519
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520 if (ftruncate(self->fd, self->offset + new_size) == -1) {
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diff changeset
521 PyErr_SetFromErrno(mmap_module_error);
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diff changeset
522 return NULL;
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diff changeset
523 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
524
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
525 #ifdef MREMAP_MAYMOVE
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
526 newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE);
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
527 #else
61465
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
528 #if defined(__NetBSD__)
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diff changeset
529 newmap = mremap(self->data, self->size, self->data, new_size, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
530 #else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
531 newmap = mremap(self->data, self->size, new_size, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
532 #endif /* __NetBSD__ */
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
533 #endif
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
534 if (newmap == (void *)-1)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
535 {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
536 PyErr_SetFromErrno(mmap_module_error);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
537 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
538 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
539 self->data = newmap;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
540 self->size = new_size;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
541 Py_INCREF(Py_None);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
542 return Py_None;
12948
acb0261b6942 Support resizing the mapping depending on whether HAVE_MREMAP is defined
Andrew M. Kuchling <amk@amk.ca>
parents: 12945
diff changeset
543 #endif /* HAVE_MREMAP */
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
544 #endif /* UNIX */
61465
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
545 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
546 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
547
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
548 static PyObject *
38489
3fe3ccdf0155 Make use of METH_O and METH_NOARGS where possible.
Georg Brandl <georg@python.org>
parents: 38485
diff changeset
549 mmap_tell_method(mmap_object *self, PyObject *unused)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
550 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
551 CHECK_VALID(NULL);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
552 return PyInt_FromSize_t(self->pos);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
553 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
554
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
555 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
556 mmap_flush_method(mmap_object *self, PyObject *args)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
557 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
558 Py_ssize_t offset = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
559 Py_ssize_t size = self->size;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
560 CHECK_VALID(NULL);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
561 if (!PyArg_ParseTuple(args, "|nn:flush", &offset, &size))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
562 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
563 if ((size_t)(offset + size) > self->size) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
564 PyErr_SetString(PyExc_ValueError, "flush values out of range");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
565 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
566 }
66826
fa55b03be574 Merged revisions 85678 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 63426
diff changeset
567
fa55b03be574 Merged revisions 85678 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 63426
diff changeset
568 if (self->access == ACCESS_READ || self->access == ACCESS_COPY)
fa55b03be574 Merged revisions 85678 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 63426
diff changeset
569 return PyLong_FromLong(0);
fa55b03be574 Merged revisions 85678 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 63426
diff changeset
570
24071
8142f8d668a0 Patch #569753: Remove support for WIN16.
Martin v. Löwis <martin@v.loewis.de>
parents: 22177
diff changeset
571 #ifdef MS_WINDOWS
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
572 return PyInt_FromLong((long) FlushViewOfFile(self->data+offset, size));
44994
ff58b30a8d52 Mostly reformat. Also set an error and return NULL if neither MS_WINDOWS
Neal Norwitz <nnorwitz@gmail.com>
parents: 44981
diff changeset
573 #elif defined(UNIX)
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
574 /* XXX semantics of return value? */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
575 /* XXX flags for msync? */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
576 if (-1 == msync(self->data + offset, size, MS_SYNC)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
577 PyErr_SetFromErrno(mmap_module_error);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
578 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
579 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
580 return PyInt_FromLong(0);
44994
ff58b30a8d52 Mostly reformat. Also set an error and return NULL if neither MS_WINDOWS
Neal Norwitz <nnorwitz@gmail.com>
parents: 44981
diff changeset
581 #else
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
582 PyErr_SetString(PyExc_ValueError, "flush not supported on this system");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
583 return NULL;
44994
ff58b30a8d52 Mostly reformat. Also set an error and return NULL if neither MS_WINDOWS
Neal Norwitz <nnorwitz@gmail.com>
parents: 44981
diff changeset
584 #endif
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
585 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
586
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
587 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
588 mmap_seek_method(mmap_object *self, PyObject *args)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
589 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
590 Py_ssize_t dist;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
591 int how=0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
592 CHECK_VALID(NULL);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
593 if (!PyArg_ParseTuple(args, "n|i:seek", &dist, &how))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
594 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
595 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
596 size_t where;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
597 switch (how) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
598 case 0: /* relative to start */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
599 if (dist < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
600 goto onoutofrange;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
601 where = dist;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
602 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
603 case 1: /* relative to current position */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
604 if ((Py_ssize_t)self->pos + dist < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
605 goto onoutofrange;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
606 where = self->pos + dist;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
607 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
608 case 2: /* relative to end */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
609 if ((Py_ssize_t)self->size + dist < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
610 goto onoutofrange;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
611 where = self->size + dist;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
612 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
613 default:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
614 PyErr_SetString(PyExc_ValueError, "unknown seek type");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
615 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
616 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
617 if (where > self->size)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
618 goto onoutofrange;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
619 self->pos = where;
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parents: 54971
diff changeset
620 Py_INCREF(Py_None);
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parents: 54971
diff changeset
621 return Py_None;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
622 }
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
623
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
624 onoutofrange:
61465
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parents: 54971
diff changeset
625 PyErr_SetString(PyExc_ValueError, "seek out of range");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
626 return NULL;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
627 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
628
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
629 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
630 mmap_move_method(mmap_object *self, PyObject *args)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
631 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
632 unsigned long dest, src, cnt;
61465
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
633 CHECK_VALID(NULL);
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
634 if (!PyArg_ParseTuple(args, "kkk:move", &dest, &src, &cnt) ||
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
635 !is_writeable(self)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
636 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
637 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
638 /* bounds check the values */
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
639 if (cnt < 0 || (cnt + dest) < cnt || (cnt + src) < cnt ||
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
640 src < 0 || src > self->size || (src + cnt) > self->size ||
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
641 dest < 0 || dest > self->size || (dest + cnt) > self->size) {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
642 PyErr_SetString(PyExc_ValueError,
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
643 "source, destination, or count out of range");
61465
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diff changeset
644 return NULL;
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parents: 54971
diff changeset
645 }
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
646 memmove(self->data+dest, self->data+src, cnt);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 54966
diff changeset
647 Py_INCREF(Py_None);
fd25030223b0 Untabify C files. Will watch buildbots.
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diff changeset
648 return Py_None;
61465
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diff changeset
649 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
650 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
651
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652 static struct PyMethodDef mmap_object_methods[] = {
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653 {"close", (PyCFunction) mmap_close_method, METH_NOARGS},
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654 {"find", (PyCFunction) mmap_find_method, METH_VARARGS},
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655 {"rfind", (PyCFunction) mmap_rfind_method, METH_VARARGS},
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656 {"flush", (PyCFunction) mmap_flush_method, METH_VARARGS},
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657 {"move", (PyCFunction) mmap_move_method, METH_VARARGS},
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658 {"read", (PyCFunction) mmap_read_method, METH_VARARGS},
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659 {"read_byte", (PyCFunction) mmap_read_byte_method, METH_NOARGS},
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660 {"readline", (PyCFunction) mmap_read_line_method, METH_NOARGS},
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661 {"resize", (PyCFunction) mmap_resize_method, METH_VARARGS},
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662 {"seek", (PyCFunction) mmap_seek_method, METH_VARARGS},
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663 {"size", (PyCFunction) mmap_size_method, METH_NOARGS},
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664 {"tell", (PyCFunction) mmap_tell_method, METH_NOARGS},
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665 {"write", (PyCFunction) mmap_write_method, METH_VARARGS},
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666 {"write_byte", (PyCFunction) mmap_write_byte_method, METH_VARARGS},
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667 {NULL, NULL} /* sentinel */
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668 };
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diff changeset
669
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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670 /* Functions for treating an mmap'ed file as a buffer */
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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diff changeset
671
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672 static Py_ssize_t
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673 mmap_buffer_getreadbuf(mmap_object *self, Py_ssize_t index, const void **ptr)
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674 {
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675 CHECK_VALID(-1);
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676 if (index != 0) {
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677 PyErr_SetString(PyExc_SystemError,
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678 "Accessing non-existent mmap segment");
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679 return -1;
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680 }
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681 *ptr = self->data;
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682 return self->size;
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683 }
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684
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685 static Py_ssize_t
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686 mmap_buffer_getwritebuf(mmap_object *self, Py_ssize_t index, const void **ptr)
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687 {
61465
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688 CHECK_VALID(-1);
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689 if (index != 0) {
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690 PyErr_SetString(PyExc_SystemError,
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691 "Accessing non-existent mmap segment");
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692 return -1;
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693 }
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694 if (!is_writeable(self))
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695 return -1;
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696 *ptr = self->data;
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697 return self->size;
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698 }
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699
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700 static Py_ssize_t
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701 mmap_buffer_getsegcount(mmap_object *self, Py_ssize_t *lenp)
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702 {
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703 CHECK_VALID(-1);
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704 if (lenp)
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705 *lenp = self->size;
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706 return 1;
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707 }
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708
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709 static Py_ssize_t
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710 mmap_buffer_getcharbuffer(mmap_object *self, Py_ssize_t index, const void **ptr)
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711 {
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712 if (index != 0) {
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713 PyErr_SetString(PyExc_SystemError,
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714 "accessing non-existent buffer segment");
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715 return -1;
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716 }
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717 *ptr = (const char *)self->data;
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718 return self->size;
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719 }
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720
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721 static Py_ssize_t
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
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722 mmap_length(mmap_object *self)
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723 {
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724 CHECK_VALID(-1);
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725 return self->size;
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726 }
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diff changeset
727
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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728 static PyObject *
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729 mmap_item(mmap_object *self, Py_ssize_t i)
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730 {
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731 CHECK_VALID(NULL);
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732 if (i < 0 || (size_t)i >= self->size) {
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733 PyErr_SetString(PyExc_IndexError, "mmap index out of range");
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734 return NULL;
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735 }
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736 return PyString_FromStringAndSize(self->data + i, 1);
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737 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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738
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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739 static PyObject *
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740 mmap_slice(mmap_object *self, Py_ssize_t ilow, Py_ssize_t ihigh)
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741 {
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742 CHECK_VALID(NULL);
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743 if (ilow < 0)
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744 ilow = 0;
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745 else if ((size_t)ilow > self->size)
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746 ilow = self->size;
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747 if (ihigh < 0)
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748 ihigh = 0;
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749 if (ihigh < ilow)
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750 ihigh = ilow;
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751 else if ((size_t)ihigh > self->size)
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752 ihigh = self->size;
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753
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754 return PyString_FromStringAndSize(self->data + ilow, ihigh-ilow);
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755 }
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756
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757 static PyObject *
42951
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Thomas Wouters <thomas@python.org>
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758 mmap_subscript(mmap_object *self, PyObject *item)
9620134010a5 Improve extended slicing support in builtin types and classes. Specifically:
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parents: 42333
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759 {
61465
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760 CHECK_VALID(NULL);
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761 if (PyIndex_Check(item)) {
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762 Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
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763 if (i == -1 && PyErr_Occurred())
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764 return NULL;
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765 if (i < 0)
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766 i += self->size;
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767 if (i < 0 || (size_t)i >= self->size) {
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768 PyErr_SetString(PyExc_IndexError,
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769 "mmap index out of range");
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770 return NULL;
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771 }
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772 return PyString_FromStringAndSize(self->data + i, 1);
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773 }
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774 else if (PySlice_Check(item)) {
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775 Py_ssize_t start, stop, step, slicelen;
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776
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777 if (PySlice_GetIndicesEx((PySliceObject *)item, self->size,
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778 &start, &stop, &step, &slicelen) < 0) {
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779 return NULL;
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780 }
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781
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782 if (slicelen <= 0)
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783 return PyString_FromStringAndSize("", 0);
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diff changeset
784 else if (step == 1)
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785 return PyString_FromStringAndSize(self->data + start,
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diff changeset
786 slicelen);
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787 else {
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diff changeset
788 char *result_buf = (char *)PyMem_Malloc(slicelen);
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diff changeset
789 Py_ssize_t cur, i;
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diff changeset
790 PyObject *result;
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diff changeset
791
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792 if (result_buf == NULL)
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diff changeset
793 return PyErr_NoMemory();
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diff changeset
794 for (cur = start, i = 0; i < slicelen;
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diff changeset
795 cur += step, i++) {
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diff changeset
796 result_buf[i] = self->data[cur];
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797 }
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798 result = PyString_FromStringAndSize(result_buf,
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diff changeset
799 slicelen);
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800 PyMem_Free(result_buf);
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801 return result;
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802 }
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803 }
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804 else {
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805 PyErr_SetString(PyExc_TypeError,
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diff changeset
806 "mmap indices must be integers");
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807 return NULL;
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808 }
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809 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
810
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
811 static PyObject *
13441
5edee6878943 -- ANSI-fying, names
Fredrik Lundh <fredrik@pythonware.com>
parents: 13359
diff changeset
812 mmap_concat(mmap_object *self, PyObject *bb)
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813 {
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814 CHECK_VALID(NULL);
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815 PyErr_SetString(PyExc_SystemError,
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diff changeset
816 "mmaps don't support concatenation");
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817 return NULL;
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diff changeset
818 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
819
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
820 static PyObject *
36501
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
821 mmap_repeat(mmap_object *self, Py_ssize_t n)
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parents:
diff changeset
822 {
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823 CHECK_VALID(NULL);
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824 PyErr_SetString(PyExc_SystemError,
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diff changeset
825 "mmaps don't support repeat operation");
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826 return NULL;
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diff changeset
827 }
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
828
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
829 static int
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parents: 36446
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830 mmap_ass_slice(mmap_object *self, Py_ssize_t ilow, Py_ssize_t ihigh, PyObject *v)
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831 {
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832 const char *buf;
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833
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834 CHECK_VALID(-1);
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diff changeset
835 if (ilow < 0)
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836 ilow = 0;
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837 else if ((size_t)ilow > self->size)
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838 ilow = self->size;
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839 if (ihigh < 0)
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840 ihigh = 0;
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841 if (ihigh < ilow)
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842 ihigh = ilow;
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843 else if ((size_t)ihigh > self->size)
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844 ihigh = self->size;
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845
61465
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846 if (v == NULL) {
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847 PyErr_SetString(PyExc_TypeError,
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diff changeset
848 "mmap object doesn't support slice deletion");
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849 return -1;
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850 }
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851 if (! (PyString_Check(v)) ) {
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852 PyErr_SetString(PyExc_IndexError,
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853 "mmap slice assignment must be a string");
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854 return -1;
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855 }
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856 if (PyString_Size(v) != (ihigh - ilow)) {
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857 PyErr_SetString(PyExc_IndexError,
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diff changeset
858 "mmap slice assignment is wrong size");
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859 return -1;
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860 }
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861 if (!is_writeable(self))
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862 return -1;
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863 buf = PyString_AsString(v);
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864 memcpy(self->data + ilow, buf, ihigh-ilow);
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865 return 0;
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parents:
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866 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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parents:
diff changeset
867
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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parents:
diff changeset
868 static int
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parents: 36446
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869 mmap_ass_item(mmap_object *self, Py_ssize_t i, PyObject *v)
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870 {
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871 const char *buf;
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872
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873 CHECK_VALID(-1);
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874 if (i < 0 || (size_t)i >= self->size) {
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875 PyErr_SetString(PyExc_IndexError, "mmap index out of range");
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876 return -1;
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877 }
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878 if (v == NULL) {
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879 PyErr_SetString(PyExc_TypeError,
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880 "mmap object doesn't support item deletion");
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881 return -1;
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882 }
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883 if (! (PyString_Check(v) && PyString_Size(v)==1) ) {
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884 PyErr_SetString(PyExc_IndexError,
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885 "mmap assignment must be single-character string");
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886 return -1;
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887 }
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888 if (!is_writeable(self))
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889 return -1;
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890 buf = PyString_AsString(v);
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891 self->data[i] = buf[0];
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892 return 0;
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893 }
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parents:
diff changeset
894
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895 static int
9620134010a5 Improve extended slicing support in builtin types and classes. Specifically:
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parents: 42333
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896 mmap_ass_subscript(mmap_object *self, PyObject *item, PyObject *value)
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Thomas Wouters <thomas@python.org>
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diff changeset
897 {
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898 CHECK_VALID(-1);
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899
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900 if (PyIndex_Check(item)) {
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901 Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
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902 const char *buf;
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903
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904 if (i == -1 && PyErr_Occurred())
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905 return -1;
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906 if (i < 0)
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907 i += self->size;
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908 if (i < 0 || (size_t)i >= self->size) {
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909 PyErr_SetString(PyExc_IndexError,
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910 "mmap index out of range");
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911 return -1;
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diff changeset
912 }
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parents: 54971
diff changeset
913 if (value == NULL) {
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parents: 54971
diff changeset
914 PyErr_SetString(PyExc_TypeError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
915 "mmap object doesn't support item deletion");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
916 return -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
917 }
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parents: 54971
diff changeset
918 if (!PyString_Check(value) || PyString_Size(value) != 1) {
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parents: 54971
diff changeset
919 PyErr_SetString(PyExc_IndexError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
920 "mmap assignment must be single-character string");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
921 return -1;
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parents: 54971
diff changeset
922 }
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parents: 54971
diff changeset
923 if (!is_writeable(self))
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parents: 54971
diff changeset
924 return -1;
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parents: 54971
diff changeset
925 buf = PyString_AsString(value);
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parents: 54971
diff changeset
926 self->data[i] = buf[0];
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parents: 54971
diff changeset
927 return 0;
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parents: 54971
diff changeset
928 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
929 else if (PySlice_Check(item)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
930 Py_ssize_t start, stop, step, slicelen;
42951
9620134010a5 Improve extended slicing support in builtin types and classes. Specifically:
Thomas Wouters <thomas@python.org>
parents: 42333
diff changeset
931
61465
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diff changeset
932 if (PySlice_GetIndicesEx((PySliceObject *)item,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
933 self->size, &start, &stop,
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parents: 54971
diff changeset
934 &step, &slicelen) < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
935 return -1;
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parents: 54971
diff changeset
936 }
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parents: 54971
diff changeset
937 if (value == NULL) {
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parents: 54971
diff changeset
938 PyErr_SetString(PyExc_TypeError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
939 "mmap object doesn't support slice deletion");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
940 return -1;
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parents: 54971
diff changeset
941 }
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diff changeset
942 if (!PyString_Check(value)) {
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parents: 54971
diff changeset
943 PyErr_SetString(PyExc_IndexError,
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diff changeset
944 "mmap slice assignment must be a string");
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diff changeset
945 return -1;
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parents: 54971
diff changeset
946 }
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diff changeset
947 if (PyString_Size(value) != slicelen) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
948 PyErr_SetString(PyExc_IndexError,
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parents: 54971
diff changeset
949 "mmap slice assignment is wrong size");
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parents: 54971
diff changeset
950 return -1;
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parents: 54971
diff changeset
951 }
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diff changeset
952 if (!is_writeable(self))
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diff changeset
953 return -1;
42951
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Thomas Wouters <thomas@python.org>
parents: 42333
diff changeset
954
61465
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diff changeset
955 if (slicelen == 0)
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diff changeset
956 return 0;
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diff changeset
957 else if (step == 1) {
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diff changeset
958 const char *buf = PyString_AsString(value);
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diff changeset
959
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960 if (buf == NULL)
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961 return -1;
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962 memcpy(self->data + start, buf, slicelen);
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diff changeset
963 return 0;
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diff changeset
964 }
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965 else {
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966 Py_ssize_t cur, i;
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diff changeset
967 const char *buf = PyString_AsString(value);
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parents: 42333
diff changeset
968
61465
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969 if (buf == NULL)
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970 return -1;
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971 for (cur = start, i = 0; i < slicelen;
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972 cur += step, i++) {
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973 self->data[cur] = buf[i];
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974 }
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975 return 0;
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diff changeset
976 }
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diff changeset
977 }
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978 else {
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979 PyErr_SetString(PyExc_TypeError,
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diff changeset
980 "mmap indices must be integer");
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981 return -1;
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982 }
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
983 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
984
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
985 static PySequenceMethods mmap_as_sequence = {
61465
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986 (lenfunc)mmap_length, /*sq_length*/
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987 (binaryfunc)mmap_concat, /*sq_concat*/
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diff changeset
988 (ssizeargfunc)mmap_repeat, /*sq_repeat*/
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diff changeset
989 (ssizeargfunc)mmap_item, /*sq_item*/
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diff changeset
990 (ssizessizeargfunc)mmap_slice, /*sq_slice*/
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991 (ssizeobjargproc)mmap_ass_item, /*sq_ass_item*/
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992 (ssizessizeobjargproc)mmap_ass_slice, /*sq_ass_slice*/
12120
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parents:
diff changeset
993 };
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
994
42951
9620134010a5 Improve extended slicing support in builtin types and classes. Specifically:
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parents: 42333
diff changeset
995 static PyMappingMethods mmap_as_mapping = {
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996 (lenfunc)mmap_length,
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997 (binaryfunc)mmap_subscript,
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998 (objobjargproc)mmap_ass_subscript,
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parents:
diff changeset
999 };
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1000
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1001 static PyBufferProcs mmap_as_buffer = {
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diff changeset
1002 (readbufferproc)mmap_buffer_getreadbuf,
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diff changeset
1003 (writebufferproc)mmap_buffer_getwritebuf,
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diff changeset
1004 (segcountproc)mmap_buffer_getsegcount,
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diff changeset
1005 (charbufferproc)mmap_buffer_getcharbuffer,
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
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parents:
diff changeset
1006 };
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1007
44836
fabc688a08c6 #1087741: make mmap.mmap the type of mmap objects, not a
Georg Brandl <georg@python.org>
parents: 44827
diff changeset
1008 static PyObject *
fabc688a08c6 #1087741: make mmap.mmap the type of mmap objects, not a
Georg Brandl <georg@python.org>
parents: 44827
diff changeset
1009 new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict);
fabc688a08c6 #1087741: make mmap.mmap the type of mmap objects, not a
Georg Brandl <georg@python.org>
parents: 44827
diff changeset
1010
44827
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1011 PyDoc_STRVAR(mmap_doc,
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1012 "Windows: mmap(fileno, length[, tagname[, access[, offset]]])\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1013 \n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1014 Maps length bytes from the file specified by the file handle fileno,\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1015 and returns a mmap object. If length is larger than the current size\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1016 of the file, the file is extended to contain length bytes. If length\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1017 is 0, the maximum length of the map is the current size of the file,\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1018 except that if the file is empty Windows raises an exception (you cannot\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1019 create an empty mapping on Windows).\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1020 \n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1021 Unix: mmap(fileno, length[, flags[, prot[, access[, offset]]]])\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1022 \n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1023 Maps length bytes from the file specified by the file descriptor fileno,\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1024 and returns a mmap object. If length is 0, the maximum length of the map\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1025 will be the current size of the file when mmap is called.\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1026 flags specifies the nature of the mapping. MAP_PRIVATE creates a\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1027 private copy-on-write mapping, so changes to the contents of the mmap\n\
48300
7f038a4700b1 Fix strange character in the docstring.
Thomas Heller <theller@ctypes.org>
parents: 48114
diff changeset
1028 object will be private to this process, and MAP_SHARED creates a mapping\n\
44827
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1029 that's shared with all other processes mapping the same areas of the file.\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1030 The default value is MAP_SHARED.\n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1031 \n\
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1032 To map anonymous memory, pass -1 as the fileno (both versions).");
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1033
eab00db80c27 Switch mmap from old Py_FindMethod to new PyObject_GenericGetAttr attribute access.
Georg Brandl <georg@python.org>
parents: 44774
diff changeset
1034
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1035 static PyTypeObject mmap_object_type = {
61465
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diff changeset
1036 PyVarObject_HEAD_INIT(NULL, 0)
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diff changeset
1037 "mmap.mmap", /* tp_name */
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1038 sizeof(mmap_object), /* tp_size */
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diff changeset
1039 0, /* tp_itemsize */
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diff changeset
1040 /* methods */
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diff changeset
1041 (destructor) mmap_object_dealloc, /* tp_dealloc */
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diff changeset
1042 0, /* tp_print */
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diff changeset
1043 0, /* tp_getattr */
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diff changeset
1044 0, /* tp_setattr */
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diff changeset
1045 0, /* tp_compare */
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diff changeset
1046 0, /* tp_repr */
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diff changeset
1047 0, /* tp_as_number */
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diff changeset
1048 &mmap_as_sequence, /*tp_as_sequence*/
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diff changeset
1049 &mmap_as_mapping, /*tp_as_mapping*/
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diff changeset
1050 0, /*tp_hash*/
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diff changeset
1051 0, /*tp_call*/
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diff changeset
1052 0, /*tp_str*/
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diff changeset
1053 PyObject_GenericGetAttr, /*tp_getattro*/
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diff changeset
1054 0, /*tp_setattro*/
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diff changeset
1055 &mmap_as_buffer, /*tp_as_buffer*/
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diff changeset
1056 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GETCHARBUFFER, /*tp_flags*/
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diff changeset
1057 mmap_doc, /*tp_doc*/
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diff changeset
1058 0, /* tp_traverse */
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diff changeset
1059 0, /* tp_clear */
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diff changeset
1060 0, /* tp_richcompare */
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diff changeset
1061 0, /* tp_weaklistoffset */
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diff changeset
1062 0, /* tp_iter */
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diff changeset
1063 0, /* tp_iternext */
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diff changeset
1064 mmap_object_methods, /* tp_methods */
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diff changeset
1065 0, /* tp_members */
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1066 0, /* tp_getset */
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1067 0, /* tp_base */
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1068 0, /* tp_dict */
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1069 0, /* tp_descr_get */
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1070 0, /* tp_descr_set */
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1071 0, /* tp_dictoffset */
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1072 0, /* tp_init */
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diff changeset
1073 PyType_GenericAlloc, /* tp_alloc */
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diff changeset
1074 new_mmap_object, /* tp_new */
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diff changeset
1075 PyObject_Del, /* tp_free */
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1076 };
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1077
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1078
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1079 /* extract the map size from the given PyObject
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1080
13620
5b727ab37092 Spelling fixes supplied by Rob W. W. Hooft. All these are fixes in either
Thomas Wouters <thomas@python.org>
parents: 13463
diff changeset
1081 Returns -1 on error, with an appropriate Python exception raised. On
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1082 success, the map size is returned. */
36541
f7f0d2a5b20b Remove size restrictions.
Martin v. Löwis <martin@v.loewis.de>
parents: 36540
diff changeset
1083 static Py_ssize_t
43640
04088abf4e4f Add phuang patch from Issue 708374 which adds offset parameter to mmap module.
Travis E. Oliphant <oliphant@enthought.com>
parents: 42951
diff changeset
1084 _GetMapSize(PyObject *o, const char* param)
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
diff changeset
1085 {
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1086 if (o == NULL)
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1087 return 0;
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1088 if (PyIndex_Check(o)) {
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diff changeset
1089 Py_ssize_t i = PyNumber_AsSsize_t(o, PyExc_OverflowError);
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1090 if (i==-1 && PyErr_Occurred())
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1091 return -1;
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1092 if (i < 0) {
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1093 PyErr_Format(PyExc_OverflowError,
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diff changeset
1094 "memory mapped %s must be positive",
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diff changeset
1095 param);
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1096 return -1;
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1097 }
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1098 return i;
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1099 }
12945
5d2fb67408a7 Patch from Trent Mick:
Andrew M. Kuchling <amk@amk.ca>
parents: 12944
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1100
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1101 PyErr_SetString(PyExc_TypeError, "map size must be an integral value");
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1102 return -1;
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1103 }
5d2fb67408a7 Patch from Trent Mick:
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parents: 12944
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1104
36537
fdabdf148336 Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
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1105 #ifdef UNIX
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1106 #ifdef HAVE_LARGEFILE_SUPPORT
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1107 #define _Py_PARSE_OFF_T "L"
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1108 #else
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1109 #define _Py_PARSE_OFF_T "l"
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1110 #endif
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1111
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1112 static PyObject *
44836
fabc688a08c6 #1087741: make mmap.mmap the type of mmap objects, not a
Georg Brandl <georg@python.org>
parents: 44827
diff changeset
1113 new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1114 {
25130
368bc3a4919e SF bug # 585792, Invalid mmap crashes Python interpreter
Neal Norwitz <nnorwitz@gmail.com>
parents: 24363
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1115 #ifdef HAVE_FSTAT
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1116 struct stat st;
25130
368bc3a4919e SF bug # 585792, Invalid mmap crashes Python interpreter
Neal Norwitz <nnorwitz@gmail.com>
parents: 24363
diff changeset
1117 #endif
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1118 mmap_object *m_obj;
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1119 PyObject *map_size_obj = NULL;
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1120 Py_ssize_t map_size;
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1121 off_t offset = 0;
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1122 int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ;
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1123 int devzero = -1;
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1124 int access = (int)ACCESS_DEFAULT;
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1125 static char *keywords[] = {"fileno", "length",
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1126 "flags", "prot",
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1127 "access", "offset", NULL};
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1128
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1129 if (!PyArg_ParseTupleAndKeywords(args, kwdict, "iO|iii" _Py_PARSE_OFF_T, keywords,
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1130 &fd, &map_size_obj, &flags, &prot,
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1131 &access, &offset))
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1132 return NULL;
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1133 map_size = _GetMapSize(map_size_obj, "size");
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1134 if (map_size < 0)
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1135 return NULL;
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1136 if (offset < 0) {
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1137 PyErr_SetString(PyExc_OverflowError,
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1138 "memory mapped offset must be positive");
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1139 return NULL;
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1140 }
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1141
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1142 if ((access != (int)ACCESS_DEFAULT) &&
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diff changeset
1143 ((flags != MAP_SHARED) || (prot != (PROT_WRITE | PROT_READ))))
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1144 return PyErr_Format(PyExc_ValueError,
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diff changeset
1145 "mmap can't specify both access and flags, prot.");
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diff changeset
1146 switch ((access_mode)access) {
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1147 case ACCESS_READ:
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1148 flags = MAP_SHARED;
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1149 prot = PROT_READ;
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diff changeset
1150 break;
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1151 case ACCESS_WRITE:
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1152 flags = MAP_SHARED;
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diff changeset
1153 prot = PROT_READ | PROT_WRITE;
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diff changeset
1154 break;
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diff changeset
1155 case ACCESS_COPY:
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1156 flags = MAP_PRIVATE;
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1157 prot = PROT_READ | PROT_WRITE;
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1158 break;
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1159 case ACCESS_DEFAULT:
68272
2e4468841c4c Issue #11391: Writing to a mmap object created with
Antoine Pitrou <solipsis@pitrou.net>
parents: 68256
diff changeset
1160 /* map prot to access type */
2e4468841c4c Issue #11391: Writing to a mmap object created with
Antoine Pitrou <solipsis@pitrou.net>
parents: 68256
diff changeset
1161 if ((prot & PROT_READ) && (prot & PROT_WRITE)) {
2e4468841c4c Issue #11391: Writing to a mmap object created with
Antoine Pitrou <solipsis@pitrou.net>
parents: 68256
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1162 /* ACCESS_DEFAULT */
2e4468841c4c Issue #11391: Writing to a mmap object created with
Antoine Pitrou <solipsis@pitrou.net>
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1163 }
2e4468841c4c Issue #11391: Writing to a mmap object created with
Antoine Pitrou <solipsis@pitrou.net>
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1164 else if (prot & PROT_WRITE) {
2e4468841c4c Issue #11391: Writing to a mmap object created with
Antoine Pitrou <solipsis@pitrou.net>
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1165 access = ACCESS_WRITE;
2e4468841c4c Issue #11391: Writing to a mmap object created with
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1166 }
2e4468841c4c Issue #11391: Writing to a mmap object created with
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1167 else {
2e4468841c4c Issue #11391: Writing to a mmap object created with
Antoine Pitrou <solipsis@pitrou.net>
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1168 access = ACCESS_READ;
2e4468841c4c Issue #11391: Writing to a mmap object created with
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1169 }
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diff changeset
1170 break;
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diff changeset
1171 default:
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1172 return PyErr_Format(PyExc_ValueError,
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diff changeset
1173 "mmap invalid access parameter.");
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1174 }
25130
368bc3a4919e SF bug # 585792, Invalid mmap crashes Python interpreter
Neal Norwitz <nnorwitz@gmail.com>
parents: 24363
diff changeset
1175
69796
618c3e971e80 (Merge 3.1) Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68272
diff changeset
1176 #ifdef __APPLE__
618c3e971e80 (Merge 3.1) Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68272
diff changeset
1177 /* Issue #11277: fsync(2) is not enough on OS X - a special, OS X specific
618c3e971e80 (Merge 3.1) Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68272
diff changeset
1178 fcntl(2) is necessary to force DISKSYNC and get around mmap(2) bug */
618c3e971e80 (Merge 3.1) Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68272
diff changeset
1179 if (fd != -1)
618c3e971e80 (Merge 3.1) Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68272
diff changeset
1180 (void)fcntl(fd, F_FULLFSYNC);
618c3e971e80 (Merge 3.1) Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68272
diff changeset
1181 #endif
25130
368bc3a4919e SF bug # 585792, Invalid mmap crashes Python interpreter
Neal Norwitz <nnorwitz@gmail.com>
parents: 24363
diff changeset
1182 #ifdef HAVE_FSTAT
28949
ac487a7f7f2c Patch #708495: Port more stuff to OpenVMS.
Martin v. Löwis <martin@v.loewis.de>
parents: 28558
diff changeset
1183 # ifdef __VMS
61465
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1184 /* on OpenVMS we must ensure that all bytes are written to the file */
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diff changeset
1185 if (fd != -1) {
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1186 fsync(fd);
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diff changeset
1187 }
28949
ac487a7f7f2c Patch #708495: Port more stuff to OpenVMS.
Martin v. Löwis <martin@v.loewis.de>
parents: 28558
diff changeset
1188 # endif
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1189 if (fd != -1 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) {
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diff changeset
1190 if (map_size == 0) {
70944
c72dafb14c49 Issue 12404: Remove C89 incompatible code from mmap module.
Ross Lagerwall <rosslagerwall@gmail.com>
parents: 69796
diff changeset
1191 off_t calc_size;
78931
27837a33790d Closes #15676: mmap: add empty file check prior to offset check
Jesus Cea <jcea@jcea.es>
parents: 70944
diff changeset
1192 if (st.st_size == 0) {
27837a33790d Closes #15676: mmap: add empty file check prior to offset check
Jesus Cea <jcea@jcea.es>
parents: 70944
diff changeset
1193 PyErr_SetString(PyExc_ValueError,
27837a33790d Closes #15676: mmap: add empty file check prior to offset check
Jesus Cea <jcea@jcea.es>
parents: 70944
diff changeset
1194 "cannot mmap an empty file");
27837a33790d Closes #15676: mmap: add empty file check prior to offset check
Jesus Cea <jcea@jcea.es>
parents: 70944
diff changeset
1195 return NULL;
27837a33790d Closes #15676: mmap: add empty file check prior to offset check
Jesus Cea <jcea@jcea.es>
parents: 70944
diff changeset
1196 }
67708
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1197 if (offset >= st.st_size) {
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1198 PyErr_SetString(PyExc_ValueError,
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diff changeset
1199 "mmap offset is greater than file size");
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1200 return NULL;
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1201 }
70944
c72dafb14c49 Issue 12404: Remove C89 incompatible code from mmap module.
Ross Lagerwall <rosslagerwall@gmail.com>
parents: 69796
diff changeset
1202 calc_size = st.st_size - offset;
67983
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diff changeset
1203 map_size = calc_size;
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diff changeset
1204 if (map_size != calc_size) {
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diff changeset
1205 PyErr_SetString(PyExc_ValueError,
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parents: 67708
diff changeset
1206 "mmap length is too large");
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diff changeset
1207 return NULL;
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diff changeset
1208 }
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1209 } else if (offset + (size_t)map_size > st.st_size) {
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diff changeset
1210 PyErr_SetString(PyExc_ValueError,
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diff changeset
1211 "mmap length is greater than file size");
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diff changeset
1212 return NULL;
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diff changeset
1213 }
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diff changeset
1214 }
25130
368bc3a4919e SF bug # 585792, Invalid mmap crashes Python interpreter
Neal Norwitz <nnorwitz@gmail.com>
parents: 24363
diff changeset
1215 #endif
61465
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diff changeset
1216 m_obj = (mmap_object *)type->tp_alloc(type, 0);
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diff changeset
1217 if (m_obj == NULL) {return NULL;}
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diff changeset
1218 m_obj->data = NULL;
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diff changeset
1219 m_obj->size = (size_t) map_size;
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diff changeset
1220 m_obj->pos = (size_t) 0;
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diff changeset
1221 m_obj->offset = offset;
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diff changeset
1222 if (fd == -1) {
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diff changeset
1223 m_obj->fd = -1;
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parents: 54971
diff changeset
1224 /* Assume the caller wants to map anonymous memory.
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diff changeset
1225 This is the same behaviour as Windows. mmap.mmap(-1, size)
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diff changeset
1226 on both Windows and Unix map anonymous memory.
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diff changeset
1227 */
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1228 #ifdef MAP_ANONYMOUS
61465
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diff changeset
1229 /* BSD way to map anonymous memory */
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parents: 54971
diff changeset
1230 flags |= MAP_ANONYMOUS;
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1231 #else
61465
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diff changeset
1232 /* SVR4 method to map anonymous memory is to open /dev/zero */
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parents: 54971
diff changeset
1233 fd = devzero = open("/dev/zero", O_RDWR);
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diff changeset
1234 if (devzero == -1) {
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diff changeset
1235 Py_DECREF(m_obj);
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diff changeset
1236 PyErr_SetFromErrno(mmap_module_error);
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diff changeset
1237 return NULL;
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parents: 54971
diff changeset
1238 }
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1239 #endif
61465
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diff changeset
1240 } else {
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parents: 54971
diff changeset
1241 m_obj->fd = dup(fd);
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parents: 54971
diff changeset
1242 if (m_obj->fd == -1) {
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parents: 54971
diff changeset
1243 Py_DECREF(m_obj);
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parents: 54971
diff changeset
1244 PyErr_SetFromErrno(mmap_module_error);
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parents: 54971
diff changeset
1245 return NULL;
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parents: 54971
diff changeset
1246 }
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parents: 54971
diff changeset
1247 }
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1248
61465
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parents: 54971
diff changeset
1249 m_obj->data = mmap(NULL, map_size,
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parents: 54971
diff changeset
1250 prot, flags,
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parents: 54971
diff changeset
1251 fd, offset);
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1252
61465
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diff changeset
1253 if (devzero != -1) {
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parents: 54971
diff changeset
1254 close(devzero);
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parents: 54971
diff changeset
1255 }
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1256
61465
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diff changeset
1257 if (m_obj->data == (char *)-1) {
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parents: 54971
diff changeset
1258 m_obj->data = NULL;
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parents: 54971
diff changeset
1259 Py_DECREF(m_obj);
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parents: 54971
diff changeset
1260 PyErr_SetFromErrno(mmap_module_error);
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parents: 54971
diff changeset
1261 return NULL;
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diff changeset
1262 }
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diff changeset
1263 m_obj->access = (access_mode)access;
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parents: 54971
diff changeset
1264 return (PyObject *)m_obj;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1265 }
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1266 #endif /* UNIX */
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1267
24071
8142f8d668a0 Patch #569753: Remove support for WIN16.
Martin v. Löwis <martin@v.loewis.de>
parents: 22177
diff changeset
1268 #ifdef MS_WINDOWS
67983
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diff changeset
1269
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diff changeset
1270 /* A note on sizes and offsets: while the actual map size must hold in a
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diff changeset
1271 Py_ssize_t, both the total file size and the start offset can be longer
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diff changeset
1272 than a Py_ssize_t, so we use PY_LONG_LONG which is always 64-bit.
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diff changeset
1273 */
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diff changeset
1274
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1275 static PyObject *
44836
fabc688a08c6 #1087741: make mmap.mmap the type of mmap objects, not a
Georg Brandl <georg@python.org>
parents: 44827
diff changeset
1276 new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1277 {
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diff changeset
1278 mmap_object *m_obj;
67983
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1279 PyObject *map_size_obj = NULL;
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diff changeset
1280 Py_ssize_t map_size;
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diff changeset
1281 PY_LONG_LONG offset = 0, size;
61465
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diff changeset
1282 DWORD off_hi; /* upper 32 bits of offset */
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diff changeset
1283 DWORD off_lo; /* lower 32 bits of offset */
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diff changeset
1284 DWORD size_hi; /* upper 32 bits of size */
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diff changeset
1285 DWORD size_lo; /* lower 32 bits of size */
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diff changeset
1286 char *tagname = "";
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diff changeset
1287 DWORD dwErr = 0;
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diff changeset
1288 int fileno;
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diff changeset
1289 HANDLE fh = 0;
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diff changeset
1290 int access = (access_mode)ACCESS_DEFAULT;
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diff changeset
1291 DWORD flProtect, dwDesiredAccess;
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diff changeset
1292 static char *keywords[] = { "fileno", "length",
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diff changeset
1293 "tagname",
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diff changeset
1294 "access", "offset", NULL };
12146
e8c30e69666b Hacked for Win32 by Mark Hammond.
Guido van Rossum <guido@python.org>
parents: 12120
diff changeset
1295
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1296 if (!PyArg_ParseTupleAndKeywords(args, kwdict, "iO|ziL", keywords,
61465
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diff changeset
1297 &fileno, &map_size_obj,
67983
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diff changeset
1298 &tagname, &access, &offset)) {
61465
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diff changeset
1299 return NULL;
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parents: 54971
diff changeset
1300 }
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1301
61465
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diff changeset
1302 switch((access_mode)access) {
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parents: 54971
diff changeset
1303 case ACCESS_READ:
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parents: 54971
diff changeset
1304 flProtect = PAGE_READONLY;
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parents: 54971
diff changeset
1305 dwDesiredAccess = FILE_MAP_READ;
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parents: 54971
diff changeset
1306 break;
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parents: 54971
diff changeset
1307 case ACCESS_DEFAULT: case ACCESS_WRITE:
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parents: 54971
diff changeset
1308 flProtect = PAGE_READWRITE;
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parents: 54971
diff changeset
1309 dwDesiredAccess = FILE_MAP_WRITE;
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parents: 54971
diff changeset
1310 break;
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parents: 54971
diff changeset
1311 case ACCESS_COPY:
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parents: 54971
diff changeset
1312 flProtect = PAGE_WRITECOPY;
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parents: 54971
diff changeset
1313 dwDesiredAccess = FILE_MAP_COPY;
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parents: 54971
diff changeset
1314 break;
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parents: 54971
diff changeset
1315 default:
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parents: 54971
diff changeset
1316 return PyErr_Format(PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
1317 "mmap invalid access parameter.");
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parents: 54971
diff changeset
1318 }
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1319
61465
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parents: 54971
diff changeset
1320 map_size = _GetMapSize(map_size_obj, "size");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
1321 if (map_size < 0)
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parents: 54971
diff changeset
1322 return NULL;
67983
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parents: 67708
diff changeset
1323 if (offset < 0) {
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parents: 67708
diff changeset
1324 PyErr_SetString(PyExc_OverflowError,
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parents: 67708
diff changeset
1325 "memory mapped offset must be positive");
61465
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parents: 54971
diff changeset
1326 return NULL;
67983
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diff changeset
1327 }
36537
fdabdf148336 Trimmed trailing whitespace.
Tim Peters <tim.peters@gmail.com>
parents: 36536
diff changeset
1328
61465
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parents: 54971
diff changeset
1329 /* assume -1 and 0 both mean invalid filedescriptor
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1330 to 'anonymously' map memory.
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1331 XXX: fileno == 0 is a valid fd, but was accepted prior to 2.5.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1332 XXX: Should this code be added?
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parents: 54971
diff changeset
1333 if (fileno == 0)
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parents: 54971
diff changeset
1334 PyErr_Warn(PyExc_DeprecationWarning,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54971
diff changeset
1335 "don't use 0 for anonymous memory");
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parents: 54971
diff changeset
1336 */
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parents: 54971
diff changeset
1337 if (fileno != -1 && fileno != 0) {
63426
e3165eeaa700 Merged revisions 83407 via svnmerge from
Brian Curtin <brian.curtin@gmail.com>
parents: 61463
diff changeset
1338 /* Ensure that fileno is within the CRT's valid range */
e3165eeaa700 Merged revisions 83407 via svnmerge from
Brian Curtin <brian.curtin@gmail.com>
parents: 61463
diff changeset
1339 if (_PyVerify_fd(fileno) == 0) {
e3165eeaa700 Merged revisions 83407 via svnmerge from
Brian Curtin <brian.curtin@gmail.com>
parents: 61463
diff changeset
1340 PyErr_SetFromErrno(mmap_module_error);
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Brian Curtin <brian.curtin@gmail.com>
parents: 61463
diff changeset
1341 return NULL;
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Brian Curtin <brian.curtin@gmail.com>
parents: 61463
diff changeset
1342 }
61465
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diff changeset
1343 fh = (HANDLE)_get_osfhandle(fileno);
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parents: 54971
diff changeset
1344 if (fh==(HANDLE)-1) {
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diff changeset
1345 PyErr_SetFromErrno(mmap_module_error);
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diff changeset
1346 return NULL;
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parents: 54971
diff changeset
1347 }
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parents: 54971
diff changeset
1348 /* Win9x appears to need us seeked to zero */
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parents: 54971
diff changeset
1349 lseek(fileno, 0, SEEK_SET);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1350 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1351
61465
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diff changeset
1352 m_obj = (mmap_object *)type->tp_alloc(type, 0);
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parents: 54971
diff changeset
1353 if (m_obj == NULL)
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diff changeset
1354 return NULL;
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parents: 54971
diff changeset
1355 /* Set every field to an invalid marker, so we can safely
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parents: 54971
diff changeset
1356 destruct the object in the face of failure */
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parents: 54971
diff changeset
1357 m_obj->data = NULL;
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parents: 54971
diff changeset
1358 m_obj->file_handle = INVALID_HANDLE_VALUE;
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parents: 54971
diff changeset
1359 m_obj->map_handle = NULL;
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parents: 54971
diff changeset
1360 m_obj->tagname = NULL;
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parents: 54971
diff changeset
1361 m_obj->offset = offset;
13757
67b9b05ce5a5 Fixes for Windows (but also tested on Linux). Test suite now completes, and this module should not leak in the face of errors.
Mark Hammond <mhammond@skippinet.com.au>
parents: 13620
diff changeset
1362
61465
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diff changeset
1363 if (fh) {
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diff changeset
1364 /* It is necessary to duplicate the handle, so the
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diff changeset
1365 Python code can close it on us */
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parents: 54971
diff changeset
1366 if (!DuplicateHandle(
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diff changeset
1367 GetCurrentProcess(), /* source process handle */
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parents: 54971
diff changeset
1368 fh, /* handle to be duplicated */
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parents: 54971
diff changeset
1369 GetCurrentProcess(), /* target proc handle */
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parents: 54971
diff changeset
1370 (LPHANDLE)&m_obj->file_handle, /* result */
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parents: 54971
diff changeset
1371 0, /* access - ignored due to options value */
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parents: 54971
diff changeset
1372 FALSE, /* inherited by child processes? */
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parents: 54971
diff changeset
1373 DUPLICATE_SAME_ACCESS)) { /* options */
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parents: 54971
diff changeset
1374 dwErr = GetLastError();
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parents: 54971
diff changeset
1375 Py_DECREF(m_obj);
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parents: 54971
diff changeset
1376 PyErr_SetFromWindowsErr(dwErr);
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diff changeset
1377 return NULL;
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diff changeset
1378 }
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parents: 54971
diff changeset
1379 if (!map_size) {
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parents: 54971
diff changeset
1380 DWORD low,high;
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diff changeset
1381 low = GetFileSize(fh, &high);
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diff changeset
1382 /* low might just happen to have the value INVALID_FILE_SIZE;
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diff changeset
1383 so we need to check the last error also. */
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diff changeset
1384 if (low == INVALID_FILE_SIZE &&
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parents: 54971
diff changeset
1385 (dwErr = GetLastError()) != NO_ERROR) {
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parents: 54971
diff changeset
1386 Py_DECREF(m_obj);
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diff changeset
1387 return PyErr_SetFromWindowsErr(dwErr);
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diff changeset
1388 }
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diff changeset
1389
67983
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diff changeset
1390 size = (((PY_LONG_LONG) high) << 32) + low;
78976
25d477647a2d #15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete
Jesus Cea <jcea@jcea.es>
parents: 78931
diff changeset
1391 if (size == 0) {
25d477647a2d #15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete
Jesus Cea <jcea@jcea.es>
parents: 78931
diff changeset
1392 PyErr_SetString(PyExc_ValueError,
25d477647a2d #15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete
Jesus Cea <jcea@jcea.es>
parents: 78931
diff changeset
1393 "cannot mmap an empty file");
78979
39efccf7a167 #15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete (fix 2)
Jesus Cea <jcea@jcea.es>
parents: 78976
diff changeset
1394 Py_DECREF(m_obj);
78976
25d477647a2d #15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete
Jesus Cea <jcea@jcea.es>
parents: 78931
diff changeset
1395 return NULL;
25d477647a2d #15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete
Jesus Cea <jcea@jcea.es>
parents: 78931
diff changeset
1396 }
67983
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diff changeset
1397 if (offset >= size) {
67708
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diff changeset
1398 PyErr_SetString(PyExc_ValueError,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 67624
diff changeset
1399 "mmap offset is greater than file size");
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parents: 67624
diff changeset
1400 Py_DECREF(m_obj);
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1401 return NULL;
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diff changeset
1402 }
67983
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diff changeset
1403 if (offset - size > PY_SSIZE_T_MAX)
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diff changeset
1404 /* Map area too large to fit in memory */
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diff changeset
1405 m_obj->size = (Py_ssize_t) -1;
61465
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diff changeset
1406 else
67983
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1407 m_obj->size = (Py_ssize_t) (size - offset);
61465
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diff changeset
1408 } else {
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1409 m_obj->size = map_size;
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1410 size = offset + map_size;
61465
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1411 }
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1412 }
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1413 else {
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1414 m_obj->size = map_size;
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1415 size = offset + map_size;
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diff changeset
1416 }
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1417
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diff changeset
1418 /* set the initial position */
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diff changeset
1419 m_obj->pos = (size_t) 0;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1420
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diff changeset
1421 /* set the tag name */
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diff changeset
1422 if (tagname != NULL && *tagname != '\0') {
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diff changeset
1423 m_obj->tagname = PyMem_Malloc(strlen(tagname)+1);
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diff changeset
1424 if (m_obj->tagname == NULL) {
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parents: 54971
diff changeset
1425 PyErr_NoMemory();
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diff changeset
1426 Py_DECREF(m_obj);
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diff changeset
1427 return NULL;
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parents: 54971
diff changeset
1428 }
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diff changeset
1429 strcpy(m_obj->tagname, tagname);
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parents: 54971
diff changeset
1430 }
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parents: 54971
diff changeset
1431 else
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diff changeset
1432 m_obj->tagname = NULL;
13757
67b9b05ce5a5 Fixes for Windows (but also tested on Linux). Test suite now completes, and this module should not leak in the face of errors.
Mark Hammond <mhammond@skippinet.com.au>
parents: 13620
diff changeset
1433
61465
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diff changeset
1434 m_obj->access = (access_mode)access;
67983
b55869598683 Merged revisions 88486 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 67708
diff changeset
1435 size_hi = (DWORD)(size >> 32);
b55869598683 Merged revisions 88486 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 67708
diff changeset
1436 size_lo = (DWORD)(size & 0xFFFFFFFF);
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1437 off_hi = (DWORD)(offset >> 32);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1438 off_lo = (DWORD)(offset & 0xFFFFFFFF);
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parents: 54971
diff changeset
1439 /* For files, it would be sufficient to pass 0 as size.
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diff changeset
1440 For anonymous maps, we have to pass the size explicitly. */
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parents: 54971
diff changeset
1441 m_obj->map_handle = CreateFileMapping(m_obj->file_handle,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1442 NULL,
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parents: 54971
diff changeset
1443 flProtect,
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parents: 54971
diff changeset
1444 size_hi,
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parents: 54971
diff changeset
1445 size_lo,
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diff changeset
1446 m_obj->tagname);
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parents: 54971
diff changeset
1447 if (m_obj->map_handle != NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1448 m_obj->data = (char *) MapViewOfFile(m_obj->map_handle,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1449 dwDesiredAccess,
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parents: 54971
diff changeset
1450 off_hi,
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parents: 54971
diff changeset
1451 off_lo,
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parents: 54971
diff changeset
1452 m_obj->size);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1453 if (m_obj->data != NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1454 return (PyObject *)m_obj;
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parents: 54971
diff changeset
1455 else {
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parents: 54971
diff changeset
1456 dwErr = GetLastError();
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54971
diff changeset
1457 CloseHandle(m_obj->map_handle);
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parents: 54971
diff changeset
1458 m_obj->map_handle = NULL;
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parents: 54971
diff changeset
1459 }
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parents: 54971
diff changeset
1460 } else
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parents: 54971
diff changeset
1461 dwErr = GetLastError();
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parents: 54971
diff changeset
1462 Py_DECREF(m_obj);
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parents: 54971
diff changeset
1463 PyErr_SetFromWindowsErr(dwErr);
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diff changeset
1464 return NULL;
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1465 }
24071
8142f8d668a0 Patch #569753: Remove support for WIN16.
Martin v. Löwis <martin@v.loewis.de>
parents: 22177
diff changeset
1466 #endif /* MS_WINDOWS */
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1467
39470
daedaacf7e11 Check return result of PyModule_GetDict().
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
1468 static void
daedaacf7e11 Check return result of PyModule_GetDict().
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
1469 setint(PyObject *d, const char *name, long value)
daedaacf7e11 Check return result of PyModule_GetDict().
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
1470 {
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diff changeset
1471 PyObject *o = PyInt_FromLong(value);
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diff changeset
1472 if (o && PyDict_SetItemString(d, name, o) == 0) {
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diff changeset
1473 Py_DECREF(o);
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diff changeset
1474 }
39470
daedaacf7e11 Check return result of PyModule_GetDict().
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
1475 }
daedaacf7e11 Check return result of PyModule_GetDict().
Neal Norwitz <nnorwitz@gmail.com>
parents: 39463
diff changeset
1476
24363
979ff5d0ae07 Replace DL_IMPORT with PyMODINIT_FUNC and remove "/export:init..." link
Mark Hammond <mhammond@skippinet.com.au>
parents: 24071
diff changeset
1477 PyMODINIT_FUNC
44836
fabc688a08c6 #1087741: make mmap.mmap the type of mmap objects, not a
Georg Brandl <georg@python.org>
parents: 44827
diff changeset
1478 initmmap(void)
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1479 {
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diff changeset
1480 PyObject *dict, *module;
15851
a3c1a234cee7 SF bug 128713: type(mmap_object) blew up on Linux.
Tim Peters <tim.peters@gmail.com>
parents: 15803
diff changeset
1481
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diff changeset
1482 if (PyType_Ready(&mmap_object_type) < 0)
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diff changeset
1483 return;
15851
a3c1a234cee7 SF bug 128713: type(mmap_object) blew up on Linux.
Tim Peters <tim.peters@gmail.com>
parents: 15803
diff changeset
1484
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diff changeset
1485 module = Py_InitModule("mmap", NULL);
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diff changeset
1486 if (module == NULL)
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diff changeset
1487 return;
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diff changeset
1488 dict = PyModule_GetDict(module);
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diff changeset
1489 if (!dict)
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diff changeset
1490 return;
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diff changeset
1491 mmap_module_error = PyErr_NewException("mmap.error",
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diff changeset
1492 PyExc_EnvironmentError , NULL);
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diff changeset
1493 if (mmap_module_error == NULL)
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diff changeset
1494 return;
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diff changeset
1495 PyDict_SetItemString(dict, "error", mmap_module_error);
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diff changeset
1496 PyDict_SetItemString(dict, "mmap", (PyObject*) &mmap_object_type);
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1497 #ifdef PROT_EXEC
61465
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diff changeset
1498 setint(dict, "PROT_EXEC", PROT_EXEC);
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1499 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1500 #ifdef PROT_READ
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diff changeset
1501 setint(dict, "PROT_READ", PROT_READ);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1502 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1503 #ifdef PROT_WRITE
61465
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diff changeset
1504 setint(dict, "PROT_WRITE", PROT_WRITE);
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1505 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1506
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1507 #ifdef MAP_SHARED
61465
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diff changeset
1508 setint(dict, "MAP_SHARED", MAP_SHARED);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1509 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1510 #ifdef MAP_PRIVATE
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diff changeset
1511 setint(dict, "MAP_PRIVATE", MAP_PRIVATE);
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1512 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1513 #ifdef MAP_DENYWRITE
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diff changeset
1514 setint(dict, "MAP_DENYWRITE", MAP_DENYWRITE);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1515 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1516 #ifdef MAP_EXECUTABLE
61465
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diff changeset
1517 setint(dict, "MAP_EXECUTABLE", MAP_EXECUTABLE);
12120
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Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1518 #endif
36446
02f0744a9cd0 Patch #1407135, bug #1424041, make mmap.mmap(-1, length) work the same
Neal Norwitz <nnorwitz@gmail.com>
parents: 36445
diff changeset
1519 #ifdef MAP_ANONYMOUS
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diff changeset
1520 setint(dict, "MAP_ANON", MAP_ANONYMOUS);
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diff changeset
1521 setint(dict, "MAP_ANONYMOUS", MAP_ANONYMOUS);
12120
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parents:
diff changeset
1522 #endif
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1523
61465
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diff changeset
1524 setint(dict, "PAGESIZE", (long)my_getpagesize());
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1525
61465
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diff changeset
1526 setint(dict, "ALLOCATIONGRANULARITY", (long)my_getallocationgranularity());
20970
e167b82c6444 CVS patch #477161: New "access" keyword for mmap, from Jay T Miller.
Tim Peters <tim.peters@gmail.com>
parents: 20888
diff changeset
1527
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diff changeset
1528 setint(dict, "ACCESS_READ", ACCESS_READ);
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diff changeset
1529 setint(dict, "ACCESS_WRITE", ACCESS_WRITE);
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parents: 54971
diff changeset
1530 setint(dict, "ACCESS_COPY", ACCESS_COPY);
12120
ec58b503b670 Added mmap module -- map a view of a file into memory on Win32 and Unix.
Andrew M. Kuchling <amk@amk.ca>
parents:
diff changeset
1531 }