Mercurial > cpython-lru_cache-weakref
annotate Python/bltinmodule.c @ 606:c763fc64fcab legacy-trunk
long_format() is now declared in longobject.h.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Sun, 19 Jan 1992 16:25:49 +0000 |
| parents | 9f06c6689f0d |
| children | 59f9325bb8ec |
| rev | line source |
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1 /*********************************************************** |
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2 Copyright 1991 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 "compile.h" /* For ceval.h */ | |
| 37 #include "ceval.h" | |
| 38 #include "modsupport.h" | |
| 39 | |
| 40 static object * | |
| 41 builtin_abs(self, v) | |
| 42 object *self; | |
| 43 object *v; | |
| 44 { | |
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45 number_methods *nm; |
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46 if (v == NULL || (nm = v->ob_type->tp_as_number) == NULL) { |
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47 err_setstr(TypeError, "abs() requires numeric argument"); |
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48 return NULL; |
| 86 | 49 } |
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50 return (*nm->nb_absolute)(v); |
| 86 | 51 } |
| 52 | |
| 53 static object * | |
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54 builtin_apply(self, v) |
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55 object *self; |
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56 object *v; |
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57 { |
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58 object *func, *args; |
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59 if (v == NULL || !is_tupleobject(v) || gettuplesize(v) != 2) { |
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60 err_setstr(TypeError, "apply() requires (func,args)"); |
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61 return NULL; |
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62 } |
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63 func = gettupleitem(v, 0); |
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64 args = gettupleitem(v, 1); |
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65 return call_object(func, args); |
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66 } |
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67 |
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68 static object * |
| 86 | 69 builtin_chr(self, v) |
| 70 object *self; | |
| 71 object *v; | |
| 72 { | |
| 73 long x; | |
| 74 char s[1]; | |
| 75 if (v == NULL || !is_intobject(v)) { | |
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76 err_setstr(TypeError, "chr() requires int argument"); |
| 86 | 77 return NULL; |
| 78 } | |
| 79 x = getintvalue(v); | |
| 80 if (x < 0 || x >= 256) { | |
| 463 | 81 err_setstr(ValueError, "chr() arg not in range(256)"); |
| 86 | 82 return NULL; |
| 83 } | |
| 84 s[0] = x; | |
| 85 return newsizedstringobject(s, 1); | |
| 86 } | |
| 87 | |
| 88 static object * | |
| 89 builtin_dir(self, v) | |
| 90 object *self; | |
| 91 object *v; | |
| 92 { | |
| 93 object *d; | |
| 94 if (v == NULL) { | |
| 95 d = getlocals(); | |
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96 INCREF(d); |
| 86 | 97 } |
| 98 else { | |
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99 d = getattr(v, "__dict__"); |
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100 if (d == NULL) { |
| 86 | 101 err_setstr(TypeError, |
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102 "dir() argument must have __dict__ attribute"); |
| 86 | 103 return NULL; |
| 104 } | |
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105 } |
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106 if (is_dictobject(d)) { |
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107 v = getdictkeys(d); |
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108 if (sortlist(v) != 0) { |
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109 DECREF(v); |
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110 v = NULL; |
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111 } |
| 86 | 112 } |
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113 else { |
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114 v = newlistobject(0); |
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115 } |
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116 DECREF(d); |
| 86 | 117 return v; |
| 118 } | |
| 119 | |
| 120 static object * | |
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121 builtin_divmod(self, args) |
| 86 | 122 object *self; |
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123 object *args; |
| 86 | 124 { |
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125 object *v, *w, *x; |
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126 if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) { |
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127 err_setstr(TypeError, "divmod() requires 2 arguments"); |
| 86 | 128 return NULL; |
| 129 } | |
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130 v = gettupleitem(args, 0); |
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131 w = gettupleitem(args, 1); |
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132 if (v->ob_type->tp_as_number == NULL || |
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133 w->ob_type->tp_as_number == NULL) { |
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134 err_setstr(TypeError, "divmod() requires numeric arguments"); |
| 86 | 135 return NULL; |
| 136 } | |
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137 if (coerce(&v, &w) != 0) |
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138 return NULL; |
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139 x = (*v->ob_type->tp_as_number->nb_divmod)(v, w); |
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140 DECREF(v); |
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141 DECREF(w); |
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142 return x; |
| 86 | 143 } |
| 144 | |
| 145 static object * | |
| 146 exec_eval(v, start) | |
| 147 object *v; | |
| 148 int start; | |
| 149 { | |
| 150 object *str = NULL, *globals = NULL, *locals = NULL; | |
| 151 int n; | |
| 152 if (v != NULL) { | |
| 153 if (is_stringobject(v)) | |
| 154 str = v; | |
| 155 else if (is_tupleobject(v) && | |
| 156 ((n = gettuplesize(v)) == 2 || n == 3)) { | |
| 157 str = gettupleitem(v, 0); | |
| 158 globals = gettupleitem(v, 1); | |
| 159 if (n == 3) | |
| 160 locals = gettupleitem(v, 2); | |
| 161 } | |
| 162 } | |
| 163 if (str == NULL || !is_stringobject(str) || | |
| 164 globals != NULL && !is_dictobject(globals) || | |
| 165 locals != NULL && !is_dictobject(locals)) { | |
| 166 err_setstr(TypeError, | |
| 167 "exec/eval arguments must be string[,dict[,dict]]"); | |
| 168 return NULL; | |
| 169 } | |
| 170 return run_string(getstringvalue(str), start, globals, locals); | |
| 171 } | |
| 172 | |
| 173 static object * | |
| 174 builtin_eval(self, v) | |
| 175 object *self; | |
| 176 object *v; | |
| 177 { | |
| 178 return exec_eval(v, eval_input); | |
| 179 } | |
| 180 | |
| 181 static object * | |
| 182 builtin_exec(self, v) | |
| 183 object *self; | |
| 184 object *v; | |
| 185 { | |
| 186 return exec_eval(v, file_input); | |
| 187 } | |
| 188 | |
| 189 static object * | |
| 190 builtin_float(self, v) | |
| 191 object *self; | |
| 192 object *v; | |
| 193 { | |
| 194 if (v == NULL) { | |
| 195 /* */ | |
| 196 } | |
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197 else if (is_intobject(v)) { |
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198 long x = getintvalue(v); |
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199 return newfloatobject((double)x); |
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200 } |
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201 else if (is_longobject(v)) { |
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202 return newfloatobject(dgetlongvalue(v)); |
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203 } |
| 86 | 204 else if (is_floatobject(v)) { |
| 205 INCREF(v); | |
| 206 return v; | |
| 207 } | |
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208 err_setstr(TypeError, "float() argument must be int, long or float"); |
| 86 | 209 return NULL; |
| 210 } | |
| 211 | |
| 212 static object * | |
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213 builtin_hex(self, v) |
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214 object *self; |
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215 object *v; |
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216 { |
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217 if (v != NULL) { |
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218 if (is_intobject(v)) { |
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219 char buf[20]; |
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220 long x = getintvalue(v); |
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221 if (x >= 0) |
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222 sprintf(buf, "0x%lx", x); |
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223 else |
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224 sprintf(buf, "-0x%lx", -x); |
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225 return newstringobject(buf); |
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226 } |
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227 if (is_longobject(v)) { |
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228 return long_format(v, 16); |
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229 } |
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230 } |
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231 err_setstr(TypeError, "hex() requires int/long argument"); |
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232 return NULL; |
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233 } |
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234 |
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235 static object * |
| 86 | 236 builtin_input(self, v) |
| 237 object *self; | |
| 238 object *v; | |
| 239 { | |
| 240 FILE *in = sysgetfile("stdin", stdin); | |
| 241 FILE *out = sysgetfile("stdout", stdout); | |
| 242 node *n; | |
| 243 int err; | |
| 244 object *m, *d; | |
| 245 flushline(); | |
|
284
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246 if (v != NULL) { |
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247 if (printobject(v, out, PRINT_RAW) != 0) |
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248 return NULL; |
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249 } |
| 86 | 250 m = add_module("__main__"); |
| 251 d = getmoduledict(m); | |
| 252 return run_file(in, "<stdin>", expr_input, d, d); | |
| 253 } | |
| 254 | |
| 255 static object * | |
| 256 builtin_int(self, v) | |
| 257 object *self; | |
| 258 object *v; | |
| 259 { | |
| 260 if (v == NULL) { | |
| 261 /* */ | |
| 262 } | |
| 263 else if (is_intobject(v)) { | |
| 264 INCREF(v); | |
| 265 return v; | |
| 266 } | |
|
223
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267 else if (is_longobject(v)) { |
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268 long x; |
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269 x = getlongvalue(v); |
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270 if (err_occurred()) |
|
223
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271 return NULL; |
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272 return newintobject(x); |
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273 } |
| 86 | 274 else if (is_floatobject(v)) { |
| 275 double x = getfloatvalue(v); | |
|
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276 /* XXX should check for overflow */ |
| 86 | 277 return newintobject((long)x); |
| 278 } | |
|
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279 err_setstr(TypeError, "int() argument must be int, long or float"); |
| 86 | 280 return NULL; |
| 281 } | |
| 282 | |
| 283 static object * | |
| 284 builtin_len(self, v) | |
| 285 object *self; | |
| 286 object *v; | |
| 287 { | |
| 288 long len; | |
| 289 typeobject *tp; | |
| 290 if (v == NULL) { | |
| 291 err_setstr(TypeError, "len() without argument"); | |
| 292 return NULL; | |
| 293 } | |
| 294 tp = v->ob_type; | |
| 295 if (tp->tp_as_sequence != NULL) { | |
| 296 len = (*tp->tp_as_sequence->sq_length)(v); | |
| 297 } | |
| 298 else if (tp->tp_as_mapping != NULL) { | |
| 299 len = (*tp->tp_as_mapping->mp_length)(v); | |
| 300 } | |
| 301 else { | |
| 302 err_setstr(TypeError, "len() of unsized object"); | |
| 303 return NULL; | |
| 304 } | |
| 305 return newintobject(len); | |
| 306 } | |
| 307 | |
| 308 static object * | |
|
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309 builtin_long(self, v) |
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310 object *self; |
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311 object *v; |
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312 { |
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313 if (v == NULL) { |
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314 /* */ |
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315 } |
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316 else if (is_intobject(v)) { |
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317 return newlongobject(getintvalue(v)); |
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318 } |
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319 else if (is_longobject(v)) { |
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320 INCREF(v); |
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321 return v; |
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322 } |
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323 else if (is_floatobject(v)) { |
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324 double x = getfloatvalue(v); |
|
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325 return dnewlongobject(x); |
|
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326 } |
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327 err_setstr(TypeError, "long() argument must be int, long or float"); |
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328 return NULL; |
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329 } |
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330 |
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331 static object * |
| 86 | 332 min_max(v, sign) |
| 333 object *v; | |
| 334 int sign; | |
| 335 { | |
| 336 int i, n, cmp; | |
| 337 object *w, *x; | |
| 338 sequence_methods *sq; | |
| 339 if (v == NULL) { | |
| 340 err_setstr(TypeError, "min() or max() without argument"); | |
| 341 return NULL; | |
| 342 } | |
| 343 sq = v->ob_type->tp_as_sequence; | |
| 344 if (sq == NULL) { | |
| 345 err_setstr(TypeError, "min() or max() of non-sequence"); | |
| 346 return NULL; | |
| 347 } | |
| 348 n = (*sq->sq_length)(v); | |
| 349 if (n == 0) { | |
| 463 | 350 err_setstr(ValueError, "min() or max() of empty sequence"); |
| 86 | 351 return NULL; |
| 352 } | |
| 353 w = (*sq->sq_item)(v, 0); /* Implies INCREF */ | |
| 354 for (i = 1; i < n; i++) { | |
| 355 x = (*sq->sq_item)(v, i); /* Implies INCREF */ | |
| 356 cmp = cmpobject(x, w); | |
| 357 if (cmp * sign > 0) { | |
| 358 DECREF(w); | |
| 359 w = x; | |
| 360 } | |
| 361 else | |
| 362 DECREF(x); | |
| 363 } | |
| 364 return w; | |
| 365 } | |
| 366 | |
| 367 static object * | |
| 368 builtin_min(self, v) | |
| 369 object *self; | |
| 370 object *v; | |
| 371 { | |
| 372 return min_max(v, -1); | |
| 373 } | |
| 374 | |
| 375 static object * | |
| 376 builtin_max(self, v) | |
| 377 object *self; | |
| 378 object *v; | |
| 379 { | |
| 380 return min_max(v, 1); | |
| 381 } | |
| 382 | |
| 383 static object * | |
|
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384 builtin_oct(self, v) |
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385 object *self; |
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386 object *v; |
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387 { |
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388 if (v != NULL) { |
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389 if (is_intobject(v)) { |
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390 char buf[20]; |
|
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391 long x = getintvalue(v); |
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392 if (x >= 0) |
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393 sprintf(buf, "0%lo", x); |
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394 else |
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395 sprintf(buf, "-0%lo", -x); |
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396 return newstringobject(buf); |
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397 } |
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398 if (is_longobject(v)) { |
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399 return long_format(v, 8); |
|
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400 } |
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401 } |
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402 err_setstr(TypeError, "oct() requires int/long argument"); |
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403 return NULL; |
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404 } |
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405 |
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406 static object * |
| 86 | 407 builtin_open(self, v) |
| 408 object *self; | |
| 409 object *v; | |
| 410 { | |
| 411 object *name, *mode; | |
| 412 if (v == NULL || !is_tupleobject(v) || gettuplesize(v) != 2 || | |
| 413 !is_stringobject(name = gettupleitem(v, 0)) || | |
| 414 !is_stringobject(mode = gettupleitem(v, 1))) { | |
| 415 err_setstr(TypeError, "open() requires 2 string arguments"); | |
| 416 return NULL; | |
| 417 } | |
| 418 v = newfileobject(getstringvalue(name), getstringvalue(mode)); | |
| 419 return v; | |
| 420 } | |
| 421 | |
| 422 static object * | |
| 423 builtin_ord(self, v) | |
| 424 object *self; | |
| 425 object *v; | |
| 426 { | |
| 427 if (v == NULL || !is_stringobject(v)) { | |
| 428 err_setstr(TypeError, "ord() must have string argument"); | |
| 429 return NULL; | |
| 430 } | |
| 431 if (getstringsize(v) != 1) { | |
| 463 | 432 err_setstr(ValueError, "ord() arg must have length 1"); |
| 86 | 433 return NULL; |
| 434 } | |
| 435 return newintobject((long)(getstringvalue(v)[0] & 0xff)); | |
| 436 } | |
| 437 | |
| 438 static object * | |
|
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439 builtin_pow(self, args) |
|
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440 object *self; |
|
301
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441 object *args; |
|
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442 { |
|
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443 object *v, *w, *x; |
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444 if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) { |
|
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445 err_setstr(TypeError, "pow() requires 2 arguments"); |
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446 return NULL; |
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447 } |
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448 v = gettupleitem(args, 0); |
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449 w = gettupleitem(args, 1); |
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450 if (v->ob_type->tp_as_number == NULL || |
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451 w->ob_type->tp_as_number == NULL) { |
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452 err_setstr(TypeError, "pow() requires numeric arguments"); |
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453 return NULL; |
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454 } |
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455 if (coerce(&v, &w) != 0) |
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456 return NULL; |
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457 x = (*v->ob_type->tp_as_number->nb_power)(v, w); |
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458 DECREF(v); |
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459 DECREF(w); |
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460 return x; |
|
223
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461 } |
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462 |
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463 static object * |
| 86 | 464 builtin_range(self, v) |
| 465 object *self; | |
| 466 object *v; | |
| 467 { | |
| 468 static char *errmsg = "range() requires 1-3 int arguments"; | |
| 469 int i, n; | |
| 470 long ilow, ihigh, istep; | |
| 471 if (v != NULL && is_intobject(v)) { | |
| 472 ilow = 0; ihigh = getintvalue(v); istep = 1; | |
| 473 } | |
| 474 else if (v == NULL || !is_tupleobject(v)) { | |
| 475 err_setstr(TypeError, errmsg); | |
| 476 return NULL; | |
| 477 } | |
| 478 else { | |
| 479 n = gettuplesize(v); | |
| 480 if (n < 1 || n > 3) { | |
| 481 err_setstr(TypeError, errmsg); | |
| 482 return NULL; | |
| 483 } | |
| 484 for (i = 0; i < n; i++) { | |
| 485 if (!is_intobject(gettupleitem(v, i))) { | |
| 486 err_setstr(TypeError, errmsg); | |
| 487 return NULL; | |
| 488 } | |
| 489 } | |
| 490 if (n == 3) { | |
| 491 istep = getintvalue(gettupleitem(v, 2)); | |
| 492 --n; | |
| 493 } | |
| 494 else | |
| 495 istep = 1; | |
| 496 ihigh = getintvalue(gettupleitem(v, --n)); | |
| 497 if (n > 0) | |
| 498 ilow = getintvalue(gettupleitem(v, 0)); | |
| 499 else | |
| 500 ilow = 0; | |
| 501 } | |
| 502 if (istep == 0) { | |
| 463 | 503 err_setstr(ValueError, "zero step for range()"); |
| 86 | 504 return NULL; |
| 505 } | |
| 506 /* XXX ought to check overflow of subtraction */ | |
| 507 if (istep > 0) | |
| 508 n = (ihigh - ilow + istep - 1) / istep; | |
| 509 else | |
| 510 n = (ihigh - ilow + istep + 1) / istep; | |
| 511 if (n < 0) | |
| 512 n = 0; | |
| 513 v = newlistobject(n); | |
| 514 if (v == NULL) | |
| 515 return NULL; | |
| 516 for (i = 0; i < n; i++) { | |
| 517 object *w = newintobject(ilow); | |
| 518 if (w == NULL) { | |
| 519 DECREF(v); | |
| 520 return NULL; | |
| 521 } | |
| 522 setlistitem(v, i, w); | |
| 523 ilow += istep; | |
| 524 } | |
| 525 return v; | |
| 526 } | |
| 527 | |
| 528 static object * | |
| 529 builtin_raw_input(self, v) | |
| 530 object *self; | |
| 531 object *v; | |
| 532 { | |
| 533 FILE *out = sysgetfile("stdout", stdout); | |
| 534 flushline(); | |
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535 if (v != NULL) { |
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536 if (printobject(v, out, PRINT_RAW) != 0) |
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537 return NULL; |
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538 } |
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539 return filegetline(sysget("stdin"), -1); |
| 86 | 540 } |
| 541 | |
| 542 static object * | |
| 543 builtin_reload(self, v) | |
| 544 object *self; | |
| 545 object *v; | |
| 546 { | |
| 547 return reload_module(v); | |
| 548 } | |
| 549 | |
| 550 static object * | |
| 551 builtin_type(self, v) | |
| 552 object *self; | |
| 553 object *v; | |
| 554 { | |
| 555 if (v == NULL) { | |
| 556 err_setstr(TypeError, "type() requres an argument"); | |
| 557 return NULL; | |
| 558 } | |
| 559 v = (object *)v->ob_type; | |
| 560 INCREF(v); | |
| 561 return v; | |
| 562 } | |
| 563 | |
| 564 static struct methodlist builtin_methods[] = { | |
|
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565 {"abs", builtin_abs}, |
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566 {"apply", builtin_apply}, |
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567 {"chr", builtin_chr}, |
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568 {"dir", builtin_dir}, |
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569 {"divmod", builtin_divmod}, |
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570 {"eval", builtin_eval}, |
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571 {"exec", builtin_exec}, |
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572 {"float", builtin_float}, |
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573 {"hex", builtin_hex}, |
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574 {"input", builtin_input}, |
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575 {"int", builtin_int}, |
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576 {"len", builtin_len}, |
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577 {"long", builtin_long}, |
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578 {"max", builtin_max}, |
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579 {"min", builtin_min}, |
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580 {"oct", builtin_oct}, |
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581 {"open", builtin_open}, /* XXX move to OS module */ |
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582 {"ord", builtin_ord}, |
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583 {"pow", builtin_pow}, |
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584 {"range", builtin_range}, |
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585 {"raw_input", builtin_raw_input}, |
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586 {"reload", builtin_reload}, |
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587 {"type", builtin_type}, |
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588 {NULL, NULL}, |
| 86 | 589 }; |
| 590 | |
| 591 static object *builtin_dict; | |
| 592 | |
| 593 object * | |
| 594 getbuiltin(name) | |
|
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595 object *name; |
| 86 | 596 { |
|
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597 return dict2lookup(builtin_dict, name); |
| 86 | 598 } |
| 599 | |
| 600 /* Predefined exceptions */ | |
| 601 | |
| 495 | 602 object *AttributeError; |
| 86 | 603 object *EOFError; |
| 495 | 604 object *IOError; |
|
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605 object *ImportError; |
| 495 | 606 object *IndexError; |
| 607 object *KeyError; | |
| 608 object *KeyboardInterrupt; | |
| 86 | 609 object *MemoryError; |
| 610 object *NameError; | |
| 495 | 611 object *OverflowError; |
| 612 object *RuntimeError; | |
| 613 object *SyntaxError; | |
| 86 | 614 object *SystemError; |
| 545 | 615 object *SystemExit; |
| 495 | 616 object *TypeError; |
| 617 object *ValueError; | |
| 463 | 618 object *ZeroDivisionError; |
| 619 | |
| 86 | 620 static object * |
| 495 | 621 newstdexception(name) |
| 622 char *name; | |
| 86 | 623 { |
| 495 | 624 object *v = newstringobject(name); |
| 86 | 625 if (v == NULL || dictinsert(builtin_dict, name, v) != 0) |
| 626 fatal("no mem for new standard exception"); | |
| 627 return v; | |
| 628 } | |
| 629 | |
| 630 static void | |
| 631 initerrors() | |
| 632 { | |
|
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633 AttributeError = newstdexception("AttributeError"); |
| 495 | 634 EOFError = newstdexception("EOFError"); |
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635 IOError = newstdexception("IOError"); |
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636 ImportError = newstdexception("ImportError"); |
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637 IndexError = newstdexception("IndexError"); |
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638 KeyError = newstdexception("KeyError"); |
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639 KeyboardInterrupt = newstdexception("KeyboardInterrupt"); |
| 495 | 640 MemoryError = newstdexception("MemoryError"); |
| 641 NameError = newstdexception("NameError"); | |
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642 OverflowError = newstdexception("OverflowError"); |
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643 RuntimeError = newstdexception("RuntimeError"); |
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644 SyntaxError = newstdexception("SyntaxError"); |
| 495 | 645 SystemError = newstdexception("SystemError"); |
| 545 | 646 SystemExit = newstdexception("SystemExit"); |
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647 TypeError = newstdexception("TypeError"); |
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648 ValueError = newstdexception("ValueError"); |
| 495 | 649 ZeroDivisionError = newstdexception("ZeroDivisionError"); |
| 86 | 650 } |
| 651 | |
| 652 void | |
| 653 initbuiltin() | |
| 654 { | |
| 655 object *m; | |
| 656 m = initmodule("builtin", builtin_methods); | |
| 657 builtin_dict = getmoduledict(m); | |
| 658 INCREF(builtin_dict); | |
| 659 initerrors(); | |
| 660 (void) dictinsert(builtin_dict, "None", None); | |
| 661 } | |
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662 |
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663 /* Coerce two numeric types to the "larger" one. |
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664 Increment the reference count on each argument. |
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665 Return -1 and raise an exception if no coercion is possible |
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666 (and then no reference count is incremented). |
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667 XXX This should be distributed over the various numeric types, |
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668 XXX but for now I don't see how to implement that. |
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669 XXX So, for now, if you add a new numeric type, |
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670 XXX you must add to this function as well. */ |
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671 |
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672 int |
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673 coerce(pv, pw) |
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674 object **pv, **pw; |
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675 { |
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676 register object *v = *pv; |
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677 register object *w = *pw; |
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678 if (v->ob_type == w->ob_type) { |
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679 INCREF(v); |
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680 INCREF(w); |
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681 return 0; |
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682 } |
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683 if (v->ob_type->tp_as_number == NULL || |
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684 w->ob_type->tp_as_number == NULL) { |
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685 err_setstr(TypeError, "mixing number and non-number"); |
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686 return -1; |
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687 } |
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688 if (is_floatobject(v) || is_floatobject(w)) { |
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689 v = builtin_float((object *)0, v); |
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690 w = builtin_float((object *)0, w); |
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691 } |
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692 else if (is_longobject(v) || is_longobject(w)) { |
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693 v = builtin_long((object *)0, v); |
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694 w = builtin_long((object *)0, w); |
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695 } |
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696 else { |
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697 err_setstr(TypeError, "can't coerce numeric types?!?!?"); |
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698 return -1; |
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699 } |
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700 if (v == NULL || w == NULL) { |
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701 XDECREF(v); |
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702 XDECREF(w); |
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703 return -1; |
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704 } |
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c28fabe21165
Add and use coerce() routine for mixed mode arithmetic
Guido van Rossum <guido@python.org>
parents:
284
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changeset
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705 *pv = v; |
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c28fabe21165
Add and use coerce() routine for mixed mode arithmetic
Guido van Rossum <guido@python.org>
parents:
284
diff
changeset
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706 *pw = w; |
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c28fabe21165
Add and use coerce() routine for mixed mode arithmetic
Guido van Rossum <guido@python.org>
parents:
284
diff
changeset
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707 return 0; |
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c28fabe21165
Add and use coerce() routine for mixed mode arithmetic
Guido van Rossum <guido@python.org>
parents:
284
diff
changeset
|
708 } |