Mercurial > cpython-lru_cache-weakref
annotate Objects/methodobject.c @ 1330:409ea74feb21 legacy-trunk
Minor fixes / changes for Mac compatibility.
| author | Guido van Rossum <guido@python.org> |
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| date | Thu, 29 Jul 1993 08:25:09 +0000 |
| parents | 7971fecbf28e |
| children | 7c3245c18677 |
| rev | line source |
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| 145 | 1 /*********************************************************** |
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2 Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum, |
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3 Amsterdam, 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 | |
| 6 | 25 /* Method object implementation */ |
| 26 | |
| 86 | 27 #include "allobjects.h" |
| 6 | 28 |
| 29 #include "token.h" | |
| 30 | |
| 31 typedef struct { | |
| 32 OB_HEAD | |
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33 char *m_name; |
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34 method m_meth; |
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35 object *m_self; |
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36 int m_varargs; |
| 6 | 37 } methodobject; |
| 38 | |
| 39 object * | |
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40 newmethodobject(name, meth, self, varargs) |
| 6 | 41 char *name; /* static string */ |
| 42 method meth; | |
| 43 object *self; | |
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44 int varargs; |
| 6 | 45 { |
| 46 methodobject *op = NEWOBJ(methodobject, &Methodtype); | |
| 47 if (op != NULL) { | |
| 48 op->m_name = name; | |
| 49 op->m_meth = meth; | |
| 50 if (self != NULL) | |
| 51 INCREF(self); | |
| 52 op->m_self = self; | |
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53 op->m_varargs = varargs; |
| 6 | 54 } |
| 55 return (object *)op; | |
| 56 } | |
| 57 | |
| 58 method | |
| 59 getmethod(op) | |
| 60 object *op; | |
| 61 { | |
| 62 if (!is_methodobject(op)) { | |
| 27 | 63 err_badcall(); |
| 6 | 64 return NULL; |
| 65 } | |
| 66 return ((methodobject *)op) -> m_meth; | |
| 67 } | |
| 68 | |
| 69 object * | |
| 70 getself(op) | |
| 71 object *op; | |
| 72 { | |
| 73 if (!is_methodobject(op)) { | |
| 27 | 74 err_badcall(); |
| 6 | 75 return NULL; |
| 76 } | |
| 77 return ((methodobject *)op) -> m_self; | |
| 78 } | |
| 79 | |
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80 int |
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81 getvarargs(op) |
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82 object *op; |
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83 { |
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84 if (!is_methodobject(op)) { |
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85 err_badcall(); |
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86 return -1; |
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87 } |
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88 return ((methodobject *)op) -> m_varargs; |
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89 } |
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90 |
| 6 | 91 /* Methods (the standard built-in methods, that is) */ |
| 92 | |
| 93 static void | |
| 94 meth_dealloc(m) | |
| 95 methodobject *m; | |
| 96 { | |
| 97 if (m->m_self != NULL) | |
| 98 DECREF(m->m_self); | |
| 99 free((char *)m); | |
| 100 } | |
| 101 | |
| 102 static object * | |
| 103 meth_repr(m) | |
| 104 methodobject *m; | |
| 105 { | |
| 106 char buf[200]; | |
| 107 if (m->m_self == NULL) | |
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108 sprintf(buf, "<built-in function %.80s>", m->m_name); |
| 6 | 109 else |
| 86 | 110 sprintf(buf, |
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111 "<built-in method %.80s of %.80s object at %lx>", |
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112 m->m_name, m->m_self->ob_type->tp_name, |
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113 (long)m->m_self); |
| 6 | 114 return newstringobject(buf); |
| 115 } | |
| 116 | |
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117 static int |
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118 meth_compare(a, b) |
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119 methodobject *a, *b; |
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120 { |
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121 if (a->m_self != b->m_self) |
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122 return cmpobject(a->m_self, b->m_self); |
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123 if (a->m_meth == b->m_meth) |
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124 return 0; |
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125 if (strcmp(a->m_name, b->m_name) < 0) |
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126 return -1; |
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127 else |
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128 return 1; |
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129 } |
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130 |
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131 static long |
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132 meth_hash(a) |
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133 methodobject *a; |
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134 { |
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135 long x, y; |
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136 if (a->m_self == NULL) |
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137 x = 0; |
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138 else { |
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139 x = hashobject(a->m_self); |
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140 if (x == -1) |
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141 return -1; |
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142 } |
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143 return x ^ (long) a->m_meth; |
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144 } |
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145 |
| 6 | 146 typeobject Methodtype = { |
| 147 OB_HEAD_INIT(&Typetype) | |
| 148 0, | |
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149 "builtin_function_or_method", |
| 6 | 150 sizeof(methodobject), |
| 151 0, | |
| 152 meth_dealloc, /*tp_dealloc*/ | |
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153 0, /*tp_print*/ |
| 6 | 154 0, /*tp_getattr*/ |
| 155 0, /*tp_setattr*/ | |
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156 meth_compare, /*tp_compare*/ |
| 6 | 157 meth_repr, /*tp_repr*/ |
| 158 0, /*tp_as_number*/ | |
| 159 0, /*tp_as_sequence*/ | |
| 160 0, /*tp_as_mapping*/ | |
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161 meth_hash, /*tp_hash*/ |
| 6 | 162 }; |
| 86 | 163 |
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164 object *listmethods PROTO((struct methodlist *)); /* Forward */ |
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165 |
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166 static object * |
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167 listmethods(ml) |
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168 struct methodlist *ml; |
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169 { |
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170 int i, n; |
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171 object *v; |
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172 for (n = 0; ml[n].ml_name != NULL; n++) |
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173 ; |
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174 v = newlistobject(n); |
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175 if (v != NULL) { |
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176 for (i = 0; i < n; i++) |
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177 setlistitem(v, i, newstringobject(ml[i].ml_name)); |
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178 if (err_occurred()) { |
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179 DECREF(v); |
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180 v = NULL; |
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181 } |
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182 else { |
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183 sortlist(v); |
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184 } |
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185 } |
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186 return v; |
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187 } |
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188 |
| 86 | 189 /* Find a method in a module's method table. |
| 190 Usually called from an object's getattr method. */ | |
| 191 | |
| 192 object * | |
| 193 findmethod(ml, op, name) | |
| 194 struct methodlist *ml; | |
| 195 object *op; | |
| 196 char *name; | |
| 197 { | |
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198 if (strcmp(name, "__methods__") == 0) |
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199 return listmethods(ml); |
| 86 | 200 for (; ml->ml_name != NULL; ml++) { |
| 201 if (strcmp(name, ml->ml_name) == 0) | |
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202 return newmethodobject(ml->ml_name, ml->ml_meth, |
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203 op, ml->ml_varargs); |
| 86 | 204 } |
| 472 | 205 err_setstr(AttributeError, name); |
| 86 | 206 return NULL; |
| 207 } |