Mercurial > cpython-lru_cache-weakref

annotate Objects/moduleobject.c @ 4566:6403c94de50d legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 65d2d8e67da3
children d1447950fa04
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* Module object implementation */
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33
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34 #include "allobjects.h"
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35 #include "ceval.h"
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36
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37 typedef struct {
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38 OB_HEAD
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39 object *md_dict;
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40 } moduleobject;
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41
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42 object *
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43 newmoduleobject(name)
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44 char *name;
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45 {
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46 moduleobject *m;
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47 object *nameobj;
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48 m = NEWOBJ(moduleobject, &Moduletype);
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49 if (m == NULL)
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50 return NULL;
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51 nameobj = newstringobject(name);
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52 m->md_dict = newdictobject();
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53 if (m->md_dict == NULL || nameobj == NULL)
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54 goto fail;
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55 if (dictinsert(m->md_dict, "__name__", nameobj) != 0)
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56 goto fail;
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57 if (dictinsert(m->md_dict, "__doc__", None) != 0)
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58 goto fail;
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59 DECREF(nameobj);
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60 return (object *)m;
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61
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62 fail:
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63 XDECREF(nameobj);
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64 DECREF(m);
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65 return NULL;
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66 }
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67
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68 object *
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69 getmoduledict(m)
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70 object *m;
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71 {
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72 if (!is_moduleobject(m)) {
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73 err_badcall();
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74 return NULL;
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75 }
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76 return ((moduleobject *)m) -> md_dict;
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77 }
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78
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79 char *
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80 getmodulename(m)
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81 object *m;
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82 {
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83 object *nameobj;
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84 if (!is_moduleobject(m)) {
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85 err_badarg();
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86 return NULL;
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87 }
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88 nameobj = dictlookup(((moduleobject *)m)->md_dict, "__name__");
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89 if (nameobj == NULL || !is_stringobject(nameobj)) {
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90 err_setstr(SystemError, "nameless module");
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91 return NULL;
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92 }
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93 return getstringvalue(nameobj);
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94 }
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95
6
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96 /* Methods */
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97
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98 static void
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99 module_dealloc(m)
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100 moduleobject *m;
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101 {
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102 if (m->md_dict != NULL) {
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103 mappingclear(m->md_dict);
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104 DECREF(m->md_dict);
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105 }
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106 free((char *)m);
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107 }
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108
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109 static object *
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110 module_repr(m)
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111 moduleobject *m;
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112 {
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113 char buf[100];
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114 char *name = getmodulename((object *)m);
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115 if (name == NULL) {
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116 err_clear();
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117 name = "?";
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118 }
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119 sprintf(buf, "<module '%.80s'>", name);
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120 return newstringobject(buf);
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121 }
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122
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123 static object *
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124 module_getattr(m, name)
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125 moduleobject *m;
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126 char *name;
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127 {
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128 object *res;
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129 if (strcmp(name, "__dict__") == 0) {
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130 INCREF(m->md_dict);
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131 return m->md_dict;
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132 }
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133 res = dictlookup(m->md_dict, name);
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134 if (res == NULL)
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135 err_setstr(AttributeError, name);
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136 else {
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137 #ifdef SUPPORT_OBSOLETE_ACCESS
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138 if (is_accessobject(res))
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139 res = getaccessvalue(res, getglobals());
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140 else
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141 #endif
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142 INCREF(res);
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143 }
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144 return res;
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145 }
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146
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147 static int
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148 module_setattr(m, name, v)
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149 moduleobject *m;
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150 char *name;
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151 object *v;
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152 {
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153 #ifdef SUPPORT_OBSOLETE_ACCESS
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154 object *ac;
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155 #endif
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156 if (name[0] == '_' && strcmp(name, "__dict__") == 0) {
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157 err_setstr(TypeError, "read-only special attribute");
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158 return -1;
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159 }
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160 #ifdef SUPPORT_OBSOLETE_ACCESS
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161 ac = dictlookup(m->md_dict, name);
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162 if (ac != NULL && is_accessobject(ac))
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163 return setaccessvalue(ac, getglobals(), v);
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164 #endif
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165 if (v == NULL) {
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166 int rv = dictremove(m->md_dict, name);
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167 if (rv < 0)
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168 err_setstr(AttributeError,
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169 "delete non-existing module attribute");
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170 return rv;
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171 }
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172 else
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173 return dictinsert(m->md_dict, name, v);
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174 }
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175
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176 typeobject Moduletype = {
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177 OB_HEAD_INIT(&Typetype)
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178 0, /*ob_size*/
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179 "module", /*tp_name*/
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180 sizeof(moduleobject), /*tp_size*/
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181 0, /*tp_itemsize*/
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182 (destructor)module_dealloc, /*tp_dealloc*/
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183 0, /*tp_print*/
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184 (getattrfunc)module_getattr, /*tp_getattr*/
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185 (setattrfunc)module_setattr, /*tp_setattr*/
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186 0, /*tp_compare*/
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187 (reprfunc)module_repr, /*tp_repr*/
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188 };