Mercurial > cpython-lru_cache-weakref
annotate Python/structmember.c @ 3323:6098aaa8ae7f legacy-trunk
changes for complex numbers
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Fri, 12 Jan 1996 01:09:56 +0000 |
| parents | d0d0a69b5ca3 |
| children | 65d2d8e67da3 |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
|
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
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3 The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
| 7 Permission to use, copy, modify, and distribute this software and its | |
| 8 documentation for any purpose and without fee is hereby granted, | |
| 9 provided that the above copyright notice appear in all copies and that | |
| 10 both that copyright notice and this permission notice appear in | |
| 11 supporting documentation, and that the names of Stichting Mathematisch | |
| 12 Centrum or CWI not be used in advertising or publicity pertaining to | |
| 13 distribution of the software without specific, written prior permission. | |
| 14 | |
| 15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
| 16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | |
| 18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 ******************************************************************/ | |
| 24 | |
| 86 | 25 /* Map C struct members to Python object attributes */ |
| 26 | |
| 27 #include "allobjects.h" | |
| 28 | |
| 29 #include "structmember.h" | |
| 30 | |
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31 static object * |
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32 listmembers(mlist) |
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33 struct memberlist *mlist; |
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34 { |
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35 int i, n; |
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36 object *v; |
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37 for (n = 0; mlist[n].name != NULL; n++) |
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38 ; |
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39 v = newlistobject(n); |
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40 if (v != NULL) { |
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41 for (i = 0; i < n; i++) |
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42 setlistitem(v, i, newstringobject(mlist[i].name)); |
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43 if (err_occurred()) { |
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44 DECREF(v); |
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45 v = NULL; |
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46 } |
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47 else { |
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48 sortlist(v); |
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49 } |
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50 } |
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51 return v; |
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52 } |
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53 |
| 86 | 54 object * |
| 55 getmember(addr, mlist, name) | |
| 56 char *addr; | |
| 57 struct memberlist *mlist; | |
| 58 char *name; | |
| 59 { | |
| 60 struct memberlist *l; | |
| 61 | |
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62 if (strcmp(name, "__members__") == 0) |
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63 return listmembers(mlist); |
| 86 | 64 for (l = mlist; l->name != NULL; l++) { |
| 65 if (strcmp(l->name, name) == 0) { | |
| 66 object *v; | |
| 67 addr += l->offset; | |
| 68 switch (l->type) { | |
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69 case T_BYTE: |
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70 v = newintobject((long) |
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71 (((*(char*)addr & 0xff) |
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72 ^ 0x80) - 0x80)); |
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73 break; |
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74 case T_UBYTE: |
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75 v = newintobject((long) *(char*)addr & 0xff); |
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76 break; |
| 86 | 77 case T_SHORT: |
| 78 v = newintobject((long) *(short*)addr); | |
| 79 break; | |
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80 case T_USHORT: |
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81 v = newintobject((long) |
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82 *(unsigned short*)addr); |
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83 break; |
| 86 | 84 case T_INT: |
| 85 v = newintobject((long) *(int*)addr); | |
| 86 break; | |
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87 case T_UINT: |
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88 v = newintobject((long) *(unsigned int*)addr); |
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89 break; |
| 86 | 90 case T_LONG: |
| 91 v = newintobject(*(long*)addr); | |
| 92 break; | |
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93 case T_ULONG: |
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94 v = dnewlongobject((double) |
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95 *(unsigned long*)addr); |
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96 break; |
| 86 | 97 case T_FLOAT: |
| 98 v = newfloatobject((double)*(float*)addr); | |
| 99 break; | |
| 100 case T_DOUBLE: | |
| 101 v = newfloatobject(*(double*)addr); | |
| 102 break; | |
| 103 case T_STRING: | |
| 104 if (*(char**)addr == NULL) { | |
| 105 INCREF(None); | |
| 106 v = None; | |
| 107 } | |
| 108 else | |
| 109 v = newstringobject(*(char**)addr); | |
| 110 break; | |
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111 case T_STRING_INPLACE: |
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112 v = newstringobject((char*)addr); |
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113 break; |
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114 #ifdef macintosh |
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115 case T_PSTRING: |
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116 if (*(char**)addr == NULL) { |
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117 INCREF(None); |
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118 v = None; |
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119 } |
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120 else |
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121 v = newsizedstringobject((*(char**)addr)+1, |
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122 **(unsigned char**)addr); |
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123 break; |
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124 case T_PSTRING_INPLACE: |
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125 v = newsizedstringobject(((char*)addr)+1, |
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126 *(unsigned char*)addr); |
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127 break; |
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128 #endif /* macintosh */ |
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129 case T_CHAR: |
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130 v = newsizedstringobject((char*)addr, 1); |
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131 break; |
| 86 | 132 case T_OBJECT: |
| 133 v = *(object **)addr; | |
| 134 if (v == NULL) | |
| 135 v = None; | |
| 136 INCREF(v); | |
| 137 break; | |
| 138 default: | |
| 139 err_setstr(SystemError, "bad memberlist type"); | |
| 140 v = NULL; | |
| 141 } | |
| 142 return v; | |
| 143 } | |
| 144 } | |
| 145 | |
| 475 | 146 err_setstr(AttributeError, name); |
| 86 | 147 return NULL; |
| 148 } | |
| 149 | |
| 150 int | |
| 151 setmember(addr, mlist, name, v) | |
| 152 char *addr; | |
| 153 struct memberlist *mlist; | |
| 154 char *name; | |
| 155 object *v; | |
| 156 { | |
| 157 struct memberlist *l; | |
| 158 | |
| 159 for (l = mlist; l->name != NULL; l++) { | |
| 160 if (strcmp(l->name, name) == 0) { | |
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161 #ifdef macintosh |
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162 if (l->readonly || l->type == T_STRING || l->type == T_PSTRING) { |
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163 #else |
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164 if (l->readonly || l->type == T_STRING ) { |
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165 #endif /* macintosh */ |
| 475 | 166 err_setstr(TypeError, "readonly attribute"); |
| 86 | 167 return -1; |
| 168 } | |
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169 if (v == NULL && l->type != T_OBJECT) { |
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170 err_setstr(TypeError, |
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171 "can't delete numeric/char attribute"); |
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172 return -1; |
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173 } |
| 86 | 174 addr += l->offset; |
| 175 switch (l->type) { | |
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176 case T_BYTE: |
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177 case T_UBYTE: |
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178 if (!is_intobject(v)) { |
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179 err_badarg(); |
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180 return -1; |
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181 } |
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182 *(char*)addr = getintvalue(v); |
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183 break; |
| 86 | 184 case T_SHORT: |
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185 case T_USHORT: |
| 86 | 186 if (!is_intobject(v)) { |
| 187 err_badarg(); | |
| 188 return -1; | |
| 189 } | |
| 190 *(short*)addr = getintvalue(v); | |
| 191 break; | |
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192 case T_UINT: |
| 86 | 193 case T_INT: |
| 194 if (!is_intobject(v)) { | |
| 195 err_badarg(); | |
| 196 return -1; | |
| 197 } | |
| 198 *(int*)addr = getintvalue(v); | |
| 199 break; | |
| 200 case T_LONG: | |
| 201 if (!is_intobject(v)) { | |
| 202 err_badarg(); | |
| 203 return -1; | |
| 204 } | |
| 205 *(long*)addr = getintvalue(v); | |
| 206 break; | |
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207 case T_ULONG: |
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208 if (is_intobject(v)) |
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209 *(long*)addr = getintvalue(v); |
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210 else if (is_longobject(v)) |
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211 *(long*)addr = getlongvalue(v); |
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212 else { |
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213 err_badarg(); |
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214 return -1; |
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215 } |
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216 break; |
| 86 | 217 case T_FLOAT: |
| 218 if (is_intobject(v)) | |
| 219 *(float*)addr = getintvalue(v); | |
| 220 else if (is_floatobject(v)) | |
| 221 *(float*)addr = getfloatvalue(v); | |
| 222 else { | |
| 223 err_badarg(); | |
| 224 return -1; | |
| 225 } | |
| 226 break; | |
| 227 case T_DOUBLE: | |
| 228 if (is_intobject(v)) | |
| 229 *(double*)addr = getintvalue(v); | |
| 230 else if (is_floatobject(v)) | |
| 231 *(double*)addr = getfloatvalue(v); | |
| 232 else { | |
| 233 err_badarg(); | |
| 234 return -1; | |
| 235 } | |
| 236 break; | |
| 237 case T_OBJECT: | |
| 238 XDECREF(*(object **)addr); | |
| 239 XINCREF(v); | |
| 240 *(object **)addr = v; | |
| 241 break; | |
|
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242 case T_CHAR: |
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243 if (is_stringobject(v) && |
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244 getstringsize(v) == 1) { |
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245 *(char*)addr = |
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246 getstringvalue(v)[0]; |
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247 } |
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248 else { |
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249 err_badarg(); |
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250 return -1; |
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251 } |
| 86 | 252 default: |
| 253 err_setstr(SystemError, "bad memberlist type"); | |
| 254 return -1; | |
| 255 } | |
| 256 return 0; | |
| 257 } | |
| 258 } | |
| 259 | |
| 475 | 260 err_setstr(AttributeError, name); |
| 95 | 261 return -1; |
| 86 | 262 } |