Mercurial > cpython-lru_cache-weakref
annotate Python/structmember.c @ 795:0cd197947d81 legacy-trunk
Copyright for 1992 added
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Sun, 05 Apr 1992 14:26:55 +0000 |
| parents | e2c3463c4d91 |
| children | dd7dfad404cd |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The |
| 145 | 3 Netherlands. |
| 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) { | |
| 69 case T_SHORT: | |
| 70 v = newintobject((long) *(short*)addr); | |
| 71 break; | |
| 72 case T_INT: | |
| 73 v = newintobject((long) *(int*)addr); | |
| 74 break; | |
| 75 case T_LONG: | |
| 76 v = newintobject(*(long*)addr); | |
| 77 break; | |
| 78 case T_FLOAT: | |
| 79 v = newfloatobject((double)*(float*)addr); | |
| 80 break; | |
| 81 case T_DOUBLE: | |
| 82 v = newfloatobject(*(double*)addr); | |
| 83 break; | |
| 84 case T_STRING: | |
| 85 if (*(char**)addr == NULL) { | |
| 86 INCREF(None); | |
| 87 v = None; | |
| 88 } | |
| 89 else | |
| 90 v = newstringobject(*(char**)addr); | |
| 91 break; | |
| 92 case T_OBJECT: | |
| 93 v = *(object **)addr; | |
| 94 if (v == NULL) | |
| 95 v = None; | |
| 96 INCREF(v); | |
| 97 break; | |
| 98 default: | |
| 99 err_setstr(SystemError, "bad memberlist type"); | |
| 100 v = NULL; | |
| 101 } | |
| 102 return v; | |
| 103 } | |
| 104 } | |
| 105 | |
| 475 | 106 err_setstr(AttributeError, name); |
| 86 | 107 return NULL; |
| 108 } | |
| 109 | |
| 110 int | |
| 111 setmember(addr, mlist, name, v) | |
| 112 char *addr; | |
| 113 struct memberlist *mlist; | |
| 114 char *name; | |
| 115 object *v; | |
| 116 { | |
| 117 struct memberlist *l; | |
| 118 | |
| 119 for (l = mlist; l->name != NULL; l++) { | |
| 120 if (strcmp(l->name, name) == 0) { | |
| 121 if (l->readonly || l->type == T_STRING) { | |
| 475 | 122 err_setstr(TypeError, "readonly attribute"); |
| 86 | 123 return -1; |
| 124 } | |
| 125 addr += l->offset; | |
| 126 switch (l->type) { | |
| 127 case T_SHORT: | |
| 128 if (!is_intobject(v)) { | |
| 129 err_badarg(); | |
| 130 return -1; | |
| 131 } | |
| 132 *(short*)addr = getintvalue(v); | |
| 133 break; | |
| 134 case T_INT: | |
| 135 if (!is_intobject(v)) { | |
| 136 err_badarg(); | |
| 137 return -1; | |
| 138 } | |
| 139 *(int*)addr = getintvalue(v); | |
| 140 break; | |
| 141 case T_LONG: | |
| 142 if (!is_intobject(v)) { | |
| 143 err_badarg(); | |
| 144 return -1; | |
| 145 } | |
| 146 *(long*)addr = getintvalue(v); | |
| 147 break; | |
| 148 case T_FLOAT: | |
| 149 if (is_intobject(v)) | |
| 150 *(float*)addr = getintvalue(v); | |
| 151 else if (is_floatobject(v)) | |
| 152 *(float*)addr = getfloatvalue(v); | |
| 153 else { | |
| 154 err_badarg(); | |
| 155 return -1; | |
| 156 } | |
| 157 break; | |
| 158 case T_DOUBLE: | |
| 159 if (is_intobject(v)) | |
| 160 *(double*)addr = getintvalue(v); | |
| 161 else if (is_floatobject(v)) | |
| 162 *(double*)addr = getfloatvalue(v); | |
| 163 else { | |
| 164 err_badarg(); | |
| 165 return -1; | |
| 166 } | |
| 167 break; | |
| 168 case T_OBJECT: | |
| 169 XDECREF(*(object **)addr); | |
| 170 XINCREF(v); | |
| 171 *(object **)addr = v; | |
| 172 break; | |
| 173 default: | |
| 174 err_setstr(SystemError, "bad memberlist type"); | |
| 175 return -1; | |
| 176 } | |
| 177 return 0; | |
| 178 } | |
| 179 } | |
| 180 | |
| 475 | 181 err_setstr(AttributeError, name); |
| 95 | 182 return -1; |
| 86 | 183 } |