Mercurial > cpython-lru_cache-weakref
annotate Python/bltinmodule.c @ 1094:d2af6bdcb6d0 legacy-trunk
* config.c: Added audioop to lists.
* Makefile: change default source directory
* socketmodule.c: added getsockname and getpeername
* bltinmodule.c: corrected typo in type() error message
* Added new built-in functions str() and repr(): repr(x) == `x`;
str(x) == x if x is a string, otherwise str(x) == repr(x).
* Added joinfields to stropmodule.c (string.join calls joinfields now)
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Thu, 26 Nov 1992 08:54:07 +0000 |
| parents | e4c6a0dd5c2b |
| children | ce718457b172 |
| rev | line source |
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1 /*********************************************************** |
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2 Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The |
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3 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 not be used in advertising or publicity pertaining to |
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13 distribution of the software without specific, written prior permission. |
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14 |
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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22 |
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23 ******************************************************************/ |
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24 |
| 86 | 25 /* Built-in functions */ |
| 26 | |
| 27 #include "allobjects.h" | |
| 28 | |
| 29 #include "node.h" | |
| 30 #include "graminit.h" | |
| 31 #include "errcode.h" | |
| 32 #include "sysmodule.h" | |
| 119 | 33 #include "bltinmodule.h" |
| 86 | 34 #include "import.h" |
| 35 #include "pythonrun.h" | |
| 36 #include "ceval.h" | |
| 37 #include "modsupport.h" | |
| 38 | |
| 39 static object * | |
| 40 builtin_abs(self, v) | |
| 41 object *self; | |
| 42 object *v; | |
| 43 { | |
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44 number_methods *nm; |
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45 if (v == NULL || (nm = v->ob_type->tp_as_number) == NULL) { |
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46 err_setstr(TypeError, "abs() requires numeric argument"); |
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47 return NULL; |
| 86 | 48 } |
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49 return (*nm->nb_absolute)(v); |
| 86 | 50 } |
| 51 | |
| 52 static object * | |
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53 builtin_apply(self, args) |
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54 object *self; |
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55 object *args; |
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56 { |
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57 object *func, *arglist; |
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58 if (!getargs(args, "(OO)", &func, &arglist)) |
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59 return NULL; |
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60 return call_object(func, arglist); |
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61 } |
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62 |
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63 static object * |
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64 builtin_chr(self, args) |
| 86 | 65 object *self; |
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66 object *args; |
| 86 | 67 { |
| 68 long x; | |
| 69 char s[1]; | |
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70 if (!getargs(args, "l", &x)) |
| 86 | 71 return NULL; |
| 72 if (x < 0 || x >= 256) { | |
| 463 | 73 err_setstr(ValueError, "chr() arg not in range(256)"); |
| 86 | 74 return NULL; |
| 75 } | |
| 76 s[0] = x; | |
| 77 return newsizedstringobject(s, 1); | |
| 78 } | |
| 79 | |
| 80 static object * | |
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81 builtin_cmp(self, args) |
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82 object *self; |
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83 object *args; |
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84 { |
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85 object *a, *b; |
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86 if (!getargs(args, "(OO)", &a, &b)) |
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87 return NULL; |
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88 return newintobject((long)cmpobject(a, b)); |
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89 } |
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90 |
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91 static object * |
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92 builtin_coerce(self, args) |
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93 object *self; |
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94 object *args; |
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95 { |
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96 object *v, *w; |
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97 object *res; |
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98 |
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99 if (!getargs(args, "(OO)", &v, &w)) |
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100 return NULL; |
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101 if (coerce(&v, &w) < 0) |
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102 return NULL; |
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103 res = mkvalue("(OO)", v, w); |
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104 DECREF(v); |
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105 DECREF(w); |
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106 return res; |
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107 } |
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108 |
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109 static object * |
| 86 | 110 builtin_dir(self, v) |
| 111 object *self; | |
| 112 object *v; | |
| 113 { | |
| 114 object *d; | |
| 115 if (v == NULL) { | |
| 116 d = getlocals(); | |
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117 INCREF(d); |
| 86 | 118 } |
| 119 else { | |
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120 d = getattr(v, "__dict__"); |
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121 if (d == NULL) { |
| 86 | 122 err_setstr(TypeError, |
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123 "dir() argument must have __dict__ attribute"); |
| 86 | 124 return NULL; |
| 125 } | |
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126 } |
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127 if (is_dictobject(d)) { |
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128 v = getdictkeys(d); |
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129 if (sortlist(v) != 0) { |
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130 DECREF(v); |
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131 v = NULL; |
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132 } |
| 86 | 133 } |
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134 else { |
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135 v = newlistobject(0); |
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136 } |
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137 DECREF(d); |
| 86 | 138 return v; |
| 139 } | |
| 140 | |
| 141 static object * | |
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142 builtin_divmod(self, args) |
| 86 | 143 object *self; |
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144 object *args; |
| 86 | 145 { |
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146 object *v, *w, *x; |
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147 if (!getargs(args, "(OO)", &v, &w)) |
| 86 | 148 return NULL; |
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149 if (v->ob_type->tp_as_number == NULL || |
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150 w->ob_type->tp_as_number == NULL) { |
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151 err_setstr(TypeError, "divmod() requires numeric arguments"); |
| 86 | 152 return NULL; |
| 153 } | |
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154 if (coerce(&v, &w) != 0) |
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155 return NULL; |
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156 x = (*v->ob_type->tp_as_number->nb_divmod)(v, w); |
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157 DECREF(v); |
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158 DECREF(w); |
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159 return x; |
| 86 | 160 } |
| 161 | |
| 162 static object * | |
| 163 exec_eval(v, start) | |
| 164 object *v; | |
| 165 int start; | |
| 166 { | |
| 167 object *str = NULL, *globals = NULL, *locals = NULL; | |
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168 char *s; |
| 86 | 169 int n; |
| 170 if (v != NULL) { | |
| 171 if (is_stringobject(v)) | |
| 172 str = v; | |
| 173 else if (is_tupleobject(v) && | |
| 174 ((n = gettuplesize(v)) == 2 || n == 3)) { | |
| 175 str = gettupleitem(v, 0); | |
| 176 globals = gettupleitem(v, 1); | |
| 177 if (n == 3) | |
| 178 locals = gettupleitem(v, 2); | |
| 179 } | |
| 180 } | |
| 181 if (str == NULL || !is_stringobject(str) || | |
| 182 globals != NULL && !is_dictobject(globals) || | |
| 183 locals != NULL && !is_dictobject(locals)) { | |
| 184 err_setstr(TypeError, | |
| 185 "exec/eval arguments must be string[,dict[,dict]]"); | |
| 186 return NULL; | |
| 187 } | |
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188 s = getstringvalue(str); |
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189 if (strlen(s) != getstringsize(str)) { |
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190 err_setstr(ValueError, "embedded '\\0' in string arg"); |
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191 return NULL; |
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192 } |
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193 if (start == eval_input) { |
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194 while (*s == ' ' || *s == '\t') |
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195 s++; |
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196 } |
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197 return run_string(s, start, globals, locals); |
| 86 | 198 } |
| 199 | |
| 200 static object * | |
| 201 builtin_eval(self, v) | |
| 202 object *self; | |
| 203 object *v; | |
| 204 { | |
| 205 return exec_eval(v, eval_input); | |
| 206 } | |
| 207 | |
| 208 static object * | |
| 209 builtin_exec(self, v) | |
| 210 object *self; | |
| 211 object *v; | |
| 212 { | |
| 213 return exec_eval(v, file_input); | |
| 214 } | |
| 215 | |
| 216 static object * | |
| 673 | 217 builtin_execfile(self, v) |
| 218 object *self; | |
| 219 object *v; | |
| 220 { | |
| 221 object *str = NULL, *globals = NULL, *locals = NULL, *w; | |
| 222 FILE* fp; | |
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223 char *s; |
| 673 | 224 int n; |
| 225 if (v != NULL) { | |
| 226 if (is_stringobject(v)) | |
| 227 str = v; | |
| 228 else if (is_tupleobject(v) && | |
| 229 ((n = gettuplesize(v)) == 2 || n == 3)) { | |
| 230 str = gettupleitem(v, 0); | |
| 231 globals = gettupleitem(v, 1); | |
| 232 if (n == 3) | |
| 233 locals = gettupleitem(v, 2); | |
| 234 } | |
| 235 } | |
| 236 if (str == NULL || !is_stringobject(str) || | |
| 237 globals != NULL && !is_dictobject(globals) || | |
| 238 locals != NULL && !is_dictobject(locals)) { | |
| 239 err_setstr(TypeError, | |
| 240 "execfile arguments must be filename[,dict[,dict]]"); | |
| 241 return NULL; | |
| 242 } | |
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243 s = getstringvalue(str); |
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244 if (strlen(s) != getstringsize(str)) { |
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245 err_setstr(ValueError, "embedded '\\0' in string arg"); |
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246 return NULL; |
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247 } |
| 926 | 248 BGN_SAVE |
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249 fp = fopen(s, "r"); |
| 926 | 250 END_SAVE |
| 673 | 251 if (fp == NULL) { |
| 252 err_setstr(IOError, "execfile cannot open the file argument"); | |
| 253 return NULL; | |
| 254 } | |
| 255 w = run_file(fp, getstringvalue(str), file_input, globals, locals); | |
| 926 | 256 BGN_SAVE |
| 673 | 257 fclose(fp); |
| 926 | 258 END_SAVE |
| 673 | 259 return w; |
| 260 } | |
| 261 | |
| 262 static object * | |
| 86 | 263 builtin_float(self, v) |
| 264 object *self; | |
| 265 object *v; | |
| 266 { | |
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267 number_methods *nb; |
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268 |
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269 if (v == NULL || (nb = v->ob_type->tp_as_number) == NULL || |
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270 nb->nb_float == NULL) { |
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271 err_setstr(TypeError, |
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272 "float() argument can't be converted to float"); |
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273 return NULL; |
|
223
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274 } |
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275 return (*nb->nb_float)(v); |
| 86 | 276 } |
| 277 | |
| 278 static object * | |
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279 builtin_getattr(self, args) |
|
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280 object *self; |
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281 object *args; |
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282 { |
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283 object *v; |
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284 char *name; |
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285 if (!getargs(args, "(Os)", &v, &name)) |
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286 return NULL; |
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287 return getattr(v, name); |
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288 } |
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289 |
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290 static object * |
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291 builtin_setattr(self, args) |
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292 object *self; |
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293 object *args; |
|
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294 { |
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295 object *v; |
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296 char *name; |
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297 object *value; |
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298 if (!getargs(args, "(OsO)", &v, &name, &value)) |
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299 return NULL; |
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300 if (setattr(v, name, value) != 0) |
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301 return NULL; |
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302 INCREF(None); |
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303 return None; |
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304 } |
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305 |
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306 static object * |
|
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307 builtin_hex(self, v) |
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308 object *self; |
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309 object *v; |
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310 { |
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311 number_methods *nb; |
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312 |
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313 if (v == NULL || (nb = v->ob_type->tp_as_number) == NULL || |
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314 nb->nb_hex == NULL) { |
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315 err_setstr(TypeError, |
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316 "hex() argument can't be converted to hex"); |
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317 return NULL; |
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318 } |
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319 return (*nb->nb_hex)(v); |
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320 } |
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321 |
|
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322 static object *builtin_raw_input PROTO((object *, object *)); |
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323 |
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324 static object * |
| 86 | 325 builtin_input(self, v) |
| 326 object *self; | |
| 327 object *v; | |
| 328 { | |
|
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329 object *line = builtin_raw_input(self, v); |
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330 if (line == NULL) |
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331 return line; |
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332 v = exec_eval(line, eval_input); |
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333 DECREF(line); |
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334 return v; |
| 86 | 335 } |
| 336 | |
| 337 static object * | |
| 338 builtin_int(self, v) | |
| 339 object *self; | |
| 340 object *v; | |
| 341 { | |
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342 number_methods *nb; |
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343 |
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344 if (v == NULL || (nb = v->ob_type->tp_as_number) == NULL || |
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345 nb->nb_int == NULL) { |
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346 err_setstr(TypeError, |
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347 "int() argument can't be converted to int"); |
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348 return NULL; |
| 86 | 349 } |
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350 return (*nb->nb_int)(v); |
| 86 | 351 } |
| 352 | |
| 353 static object * | |
| 354 builtin_len(self, v) | |
| 355 object *self; | |
| 356 object *v; | |
| 357 { | |
| 358 long len; | |
| 359 typeobject *tp; | |
| 360 if (v == NULL) { | |
| 361 err_setstr(TypeError, "len() without argument"); | |
| 362 return NULL; | |
| 363 } | |
| 364 tp = v->ob_type; | |
| 365 if (tp->tp_as_sequence != NULL) { | |
| 366 len = (*tp->tp_as_sequence->sq_length)(v); | |
| 367 } | |
| 368 else if (tp->tp_as_mapping != NULL) { | |
| 369 len = (*tp->tp_as_mapping->mp_length)(v); | |
| 370 } | |
| 371 else { | |
| 372 err_setstr(TypeError, "len() of unsized object"); | |
| 373 return NULL; | |
| 374 } | |
|
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375 if (len < 0) |
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376 return NULL; |
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377 else |
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378 return newintobject(len); |
| 86 | 379 } |
| 380 | |
| 381 static object * | |
|
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382 builtin_long(self, v) |
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383 object *self; |
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384 object *v; |
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385 { |
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386 number_methods *nb; |
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387 |
|
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388 if (v == NULL || (nb = v->ob_type->tp_as_number) == NULL || |
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389 nb->nb_long == NULL) { |
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390 err_setstr(TypeError, |
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391 "long() argument can't be converted to long"); |
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392 return NULL; |
|
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393 } |
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394 return (*nb->nb_long)(v); |
|
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395 } |
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396 |
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397 static object * |
| 86 | 398 min_max(v, sign) |
| 399 object *v; | |
| 400 int sign; | |
| 401 { | |
| 402 int i, n, cmp; | |
| 403 object *w, *x; | |
| 404 sequence_methods *sq; | |
| 405 if (v == NULL) { | |
| 406 err_setstr(TypeError, "min() or max() without argument"); | |
| 407 return NULL; | |
| 408 } | |
| 409 sq = v->ob_type->tp_as_sequence; | |
| 410 if (sq == NULL) { | |
| 411 err_setstr(TypeError, "min() or max() of non-sequence"); | |
| 412 return NULL; | |
| 413 } | |
| 414 n = (*sq->sq_length)(v); | |
| 415 if (n == 0) { | |
| 463 | 416 err_setstr(ValueError, "min() or max() of empty sequence"); |
| 86 | 417 return NULL; |
| 418 } | |
| 419 w = (*sq->sq_item)(v, 0); /* Implies INCREF */ | |
| 420 for (i = 1; i < n; i++) { | |
| 421 x = (*sq->sq_item)(v, i); /* Implies INCREF */ | |
| 422 cmp = cmpobject(x, w); | |
| 423 if (cmp * sign > 0) { | |
| 424 DECREF(w); | |
| 425 w = x; | |
| 426 } | |
| 427 else | |
| 428 DECREF(x); | |
| 429 } | |
| 430 return w; | |
| 431 } | |
| 432 | |
| 433 static object * | |
| 434 builtin_min(self, v) | |
| 435 object *self; | |
| 436 object *v; | |
| 437 { | |
| 438 return min_max(v, -1); | |
| 439 } | |
| 440 | |
| 441 static object * | |
| 442 builtin_max(self, v) | |
| 443 object *self; | |
| 444 object *v; | |
| 445 { | |
| 446 return min_max(v, 1); | |
| 447 } | |
| 448 | |
| 449 static object * | |
|
404
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450 builtin_oct(self, v) |
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451 object *self; |
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452 object *v; |
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453 { |
|
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454 number_methods *nb; |
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455 |
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456 if (v == NULL || (nb = v->ob_type->tp_as_number) == NULL || |
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457 nb->nb_oct == NULL) { |
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458 err_setstr(TypeError, |
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459 "oct() argument can't be converted to oct"); |
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460 return NULL; |
|
404
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461 } |
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462 return (*nb->nb_oct)(v); |
|
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463 } |
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464 |
|
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465 static object * |
|
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466 builtin_open(self, args) |
| 86 | 467 object *self; |
|
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468 object *args; |
| 86 | 469 { |
|
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470 char *name, *mode; |
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471 if (!getargs(args, "(ss)", &name, &mode)) |
| 86 | 472 return NULL; |
|
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473 return newfileobject(name, mode); |
| 86 | 474 } |
| 475 | |
| 476 static object * | |
|
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477 builtin_ord(self, args) |
| 86 | 478 object *self; |
|
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479 object *args; |
| 86 | 480 { |
|
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481 char *s; |
|
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482 int len; |
|
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483 if (!getargs(args, "s#", &s, &len)) |
| 86 | 484 return NULL; |
|
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485 if (len != 1) { |
| 463 | 486 err_setstr(ValueError, "ord() arg must have length 1"); |
| 86 | 487 return NULL; |
| 488 } | |
|
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489 return newintobject((long)(s[0] & 0xff)); |
| 86 | 490 } |
| 491 | |
| 492 static object * | |
|
301
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493 builtin_pow(self, args) |
|
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494 object *self; |
|
301
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495 object *args; |
|
223
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496 { |
|
301
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497 object *v, *w, *x; |
|
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498 if (!getargs(args, "(OO)", &v, &w)) |
|
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499 return NULL; |
|
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500 if (v->ob_type->tp_as_number == NULL || |
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501 w->ob_type->tp_as_number == NULL) { |
|
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502 err_setstr(TypeError, "pow() requires numeric arguments"); |
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503 return NULL; |
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504 } |
|
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505 if (coerce(&v, &w) != 0) |
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506 return NULL; |
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507 x = (*v->ob_type->tp_as_number->nb_power)(v, w); |
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508 DECREF(v); |
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509 DECREF(w); |
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510 return x; |
|
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511 } |
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512 |
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513 static object * |
| 86 | 514 builtin_range(self, v) |
| 515 object *self; | |
| 516 object *v; | |
| 517 { | |
| 518 static char *errmsg = "range() requires 1-3 int arguments"; | |
| 519 int i, n; | |
| 520 long ilow, ihigh, istep; | |
| 521 if (v != NULL && is_intobject(v)) { | |
| 522 ilow = 0; ihigh = getintvalue(v); istep = 1; | |
| 523 } | |
| 524 else if (v == NULL || !is_tupleobject(v)) { | |
| 525 err_setstr(TypeError, errmsg); | |
| 526 return NULL; | |
| 527 } | |
| 528 else { | |
| 529 n = gettuplesize(v); | |
| 530 if (n < 1 || n > 3) { | |
| 531 err_setstr(TypeError, errmsg); | |
| 532 return NULL; | |
| 533 } | |
| 534 for (i = 0; i < n; i++) { | |
| 535 if (!is_intobject(gettupleitem(v, i))) { | |
| 536 err_setstr(TypeError, errmsg); | |
| 537 return NULL; | |
| 538 } | |
| 539 } | |
| 540 if (n == 3) { | |
| 541 istep = getintvalue(gettupleitem(v, 2)); | |
| 542 --n; | |
| 543 } | |
| 544 else | |
| 545 istep = 1; | |
| 546 ihigh = getintvalue(gettupleitem(v, --n)); | |
| 547 if (n > 0) | |
| 548 ilow = getintvalue(gettupleitem(v, 0)); | |
| 549 else | |
| 550 ilow = 0; | |
| 551 } | |
| 552 if (istep == 0) { | |
| 463 | 553 err_setstr(ValueError, "zero step for range()"); |
| 86 | 554 return NULL; |
| 555 } | |
| 556 /* XXX ought to check overflow of subtraction */ | |
| 557 if (istep > 0) | |
| 558 n = (ihigh - ilow + istep - 1) / istep; | |
| 559 else | |
| 560 n = (ihigh - ilow + istep + 1) / istep; | |
| 561 if (n < 0) | |
| 562 n = 0; | |
| 563 v = newlistobject(n); | |
| 564 if (v == NULL) | |
| 565 return NULL; | |
| 566 for (i = 0; i < n; i++) { | |
| 567 object *w = newintobject(ilow); | |
| 568 if (w == NULL) { | |
| 569 DECREF(v); | |
| 570 return NULL; | |
| 571 } | |
| 572 setlistitem(v, i, w); | |
| 573 ilow += istep; | |
| 574 } | |
| 575 return v; | |
| 576 } | |
| 577 | |
| 578 static object * | |
| 579 builtin_raw_input(self, v) | |
| 580 object *self; | |
| 581 object *v; | |
| 582 { | |
|
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583 object *f = sysget("stdout"); |
|
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|
584 if (f == NULL) { |
|
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585 err_setstr(RuntimeError, "lost sys.stdout"); |
|
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586 return NULL; |
|
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587 } |
| 86 | 588 flushline(); |
|
284
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589 if (v != NULL) { |
|
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590 if (writeobject(v, f, PRINT_RAW) != 0) |
|
284
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591 return NULL; |
|
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592 } |
|
182
59ffb6d4b34c
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|
593 return filegetline(sysget("stdin"), -1); |
| 86 | 594 } |
| 595 | |
| 596 static object * | |
| 597 builtin_reload(self, v) | |
| 598 object *self; | |
| 599 object *v; | |
| 600 { | |
| 601 return reload_module(v); | |
| 602 } | |
| 603 | |
| 604 static object * | |
|
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605 builtin_repr(self, v) |
|
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606 object *self; |
|
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|
607 object *v; |
|
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608 { |
|
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609 if (v == NULL) { |
|
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|
610 err_badarg(); |
|
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611 return NULL; |
|
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612 } |
|
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|
613 return reprobject(v); |
|
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614 } |
|
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615 |
|
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616 static object * |
|
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617 builtin_str(self, v) |
|
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618 object *self; |
|
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619 object *v; |
|
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620 { |
|
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621 if (v == NULL) { |
|
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|
622 err_badarg(); |
|
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623 return NULL; |
|
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624 } |
|
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|
625 if (is_stringobject(v)) { |
|
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626 INCREF(v); |
|
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627 return v; |
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628 } |
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629 else |
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630 return reprobject(v); |
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631 } |
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632 |
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633 static object * |
| 86 | 634 builtin_type(self, v) |
| 635 object *self; | |
| 636 object *v; | |
| 637 { | |
| 638 if (v == NULL) { | |
|
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639 err_setstr(TypeError, "type() requires an argument"); |
| 86 | 640 return NULL; |
| 641 } | |
| 642 v = (object *)v->ob_type; | |
| 643 INCREF(v); | |
| 644 return v; | |
| 645 } | |
| 646 | |
| 647 static struct methodlist builtin_methods[] = { | |
|
480
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648 {"abs", builtin_abs}, |
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649 {"apply", builtin_apply}, |
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650 {"chr", builtin_chr}, |
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651 {"cmp", builtin_cmp}, |
|
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652 {"coerce", builtin_coerce}, |
|
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653 {"dir", builtin_dir}, |
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654 {"divmod", builtin_divmod}, |
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655 {"eval", builtin_eval}, |
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656 {"exec", builtin_exec}, |
| 673 | 657 {"execfile", builtin_execfile}, |
|
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658 {"float", builtin_float}, |
|
644
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659 {"getattr", builtin_getattr}, |
|
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660 {"hex", builtin_hex}, |
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661 {"input", builtin_input}, |
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662 {"int", builtin_int}, |
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663 {"len", builtin_len}, |
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664 {"long", builtin_long}, |
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665 {"max", builtin_max}, |
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666 {"min", builtin_min}, |
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667 {"oct", builtin_oct}, |
|
662
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668 {"open", builtin_open}, |
|
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669 {"ord", builtin_ord}, |
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670 {"pow", builtin_pow}, |
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671 {"range", builtin_range}, |
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672 {"raw_input", builtin_raw_input}, |
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673 {"reload", builtin_reload}, |
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674 {"repr", builtin_repr}, |
|
644
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675 {"setattr", builtin_setattr}, |
|
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676 {"str", builtin_str}, |
|
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677 {"type", builtin_type}, |
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678 {NULL, NULL}, |
| 86 | 679 }; |
| 680 | |
| 681 static object *builtin_dict; | |
| 682 | |
| 683 object * | |
| 684 getbuiltin(name) | |
|
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685 object *name; |
| 86 | 686 { |
|
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687 return dict2lookup(builtin_dict, name); |
| 86 | 688 } |
| 689 | |
| 690 /* Predefined exceptions */ | |
| 691 | |
| 495 | 692 object *AttributeError; |
| 86 | 693 object *EOFError; |
| 495 | 694 object *IOError; |
|
505
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695 object *ImportError; |
| 495 | 696 object *IndexError; |
| 697 object *KeyError; | |
| 698 object *KeyboardInterrupt; | |
| 86 | 699 object *MemoryError; |
| 700 object *NameError; | |
| 495 | 701 object *OverflowError; |
| 702 object *RuntimeError; | |
| 703 object *SyntaxError; | |
| 86 | 704 object *SystemError; |
| 545 | 705 object *SystemExit; |
| 495 | 706 object *TypeError; |
| 707 object *ValueError; | |
| 463 | 708 object *ZeroDivisionError; |
| 709 | |
| 86 | 710 static object * |
| 495 | 711 newstdexception(name) |
| 712 char *name; | |
| 86 | 713 { |
| 495 | 714 object *v = newstringobject(name); |
| 86 | 715 if (v == NULL || dictinsert(builtin_dict, name, v) != 0) |
| 716 fatal("no mem for new standard exception"); | |
| 717 return v; | |
| 718 } | |
| 719 | |
| 720 static void | |
| 721 initerrors() | |
| 722 { | |
|
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723 AttributeError = newstdexception("AttributeError"); |
| 495 | 724 EOFError = newstdexception("EOFError"); |
|
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725 IOError = newstdexception("IOError"); |
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726 ImportError = newstdexception("ImportError"); |
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727 IndexError = newstdexception("IndexError"); |
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728 KeyError = newstdexception("KeyError"); |
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729 KeyboardInterrupt = newstdexception("KeyboardInterrupt"); |
| 495 | 730 MemoryError = newstdexception("MemoryError"); |
| 731 NameError = newstdexception("NameError"); | |
|
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732 OverflowError = newstdexception("OverflowError"); |
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733 RuntimeError = newstdexception("RuntimeError"); |
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734 SyntaxError = newstdexception("SyntaxError"); |
| 495 | 735 SystemError = newstdexception("SystemError"); |
| 545 | 736 SystemExit = newstdexception("SystemExit"); |
|
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737 TypeError = newstdexception("TypeError"); |
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738 ValueError = newstdexception("ValueError"); |
| 495 | 739 ZeroDivisionError = newstdexception("ZeroDivisionError"); |
| 86 | 740 } |
| 741 | |
| 742 void | |
| 743 initbuiltin() | |
| 744 { | |
| 745 object *m; | |
| 746 m = initmodule("builtin", builtin_methods); | |
| 747 builtin_dict = getmoduledict(m); | |
| 748 INCREF(builtin_dict); | |
| 749 initerrors(); | |
| 750 (void) dictinsert(builtin_dict, "None", None); | |
| 751 } | |
|
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752 |
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753 /* Coerce two numeric types to the "larger" one. |
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754 Increment the reference count on each argument. |
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755 Return -1 and raise an exception if no coercion is possible |
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756 (and then no reference count is incremented). |
|
955
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757 */ |
|
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758 |
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759 int |
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760 coerce(pv, pw) |
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761 object **pv, **pw; |
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762 { |
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763 register object *v = *pv; |
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764 register object *w = *pw; |
|
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765 int res; |
|
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766 |
|
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767 if (v->ob_type == w->ob_type) { |
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768 INCREF(v); |
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769 INCREF(w); |
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770 return 0; |
|
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771 } |
|
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772 if (v->ob_type->tp_as_number && v->ob_type->tp_as_number->nb_coerce) { |
|
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773 res = (*v->ob_type->tp_as_number->nb_coerce)(pv, pw); |
|
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774 if (res <= 0) |
|
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775 return res; |
|
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776 } |
|
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777 if (w->ob_type->tp_as_number && w->ob_type->tp_as_number->nb_coerce) { |
|
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778 res = (*w->ob_type->tp_as_number->nb_coerce)(pw, pv); |
|
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779 if (res <= 0) |
|
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780 return res; |
|
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781 } |
|
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782 err_setstr(TypeError, "number coercion failed"); |
|
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783 return -1; |
|
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784 } |