Mercurial > cpython-lru_cache-weakref
annotate Python/pythonmain.c @ 145:853b736a6a9e legacy-trunk
Added copyright notice.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Tue, 19 Feb 1991 12:39:46 +0000 |
| parents | dac8625c8d9b |
| children | 43cabac5023d |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
| 2 Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The | |
| 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 | |
| 6 | 25 /* Python interpreter main program */ |
| 26 | |
| 86 | 27 #include "allobjects.h" |
| 6 | 28 |
| 29 #include "grammar.h" | |
| 30 #include "node.h" | |
| 31 #include "parsetok.h" | |
| 32 #include "graminit.h" | |
| 33 #include "errcode.h" | |
| 34 #include "sysmodule.h" | |
| 86 | 35 #include "compile.h" |
| 36 #include "ceval.h" | |
| 37 #include "pythonrun.h" | |
| 38 #include "import.h" | |
| 39 | |
| 40 extern char *getpythonpath(); | |
| 6 | 41 |
| 42 extern grammar gram; /* From graminit.c */ | |
| 43 | |
| 86 | 44 #ifdef DEBUG |
| 45 int debugging; /* Needed by parser.c */ | |
| 46 #endif | |
| 6 | 47 |
| 48 main(argc, argv) | |
| 49 int argc; | |
| 50 char **argv; | |
| 51 { | |
| 52 char *filename = NULL; | |
| 53 FILE *fp = stdin; | |
| 86 | 54 |
|
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55 initargs(&argc, &argv); |
| 6 | 56 |
| 57 if (argc > 1 && strcmp(argv[1], "-") != 0) | |
| 58 filename = argv[1]; | |
| 86 | 59 |
| 6 | 60 if (filename != NULL) { |
| 61 if ((fp = fopen(filename, "r")) == NULL) { | |
| 62 fprintf(stderr, "python: can't open file '%s'\n", | |
| 63 filename); | |
| 64 exit(2); | |
| 65 } | |
| 66 } | |
| 67 | |
| 86 | 68 initall(); |
| 69 | |
| 70 setpythonpath(getpythonpath()); | |
| 71 setpythonargv(argc-1, argv+1); | |
| 6 | 72 |
| 86 | 73 goaway(run(fp, filename == NULL ? "<stdin>" : filename)); |
| 74 /*NOTREACHED*/ | |
| 75 } | |
| 76 | |
| 77 /* Initialize all */ | |
| 78 | |
| 79 void | |
| 80 initall() | |
| 81 { | |
| 82 static int inited; | |
| 83 | |
| 84 if (inited) | |
| 85 return; | |
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86 inited = 1; |
| 86 | 87 |
| 88 initimport(); | |
| 89 | |
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90 /* Modules 'builtin' and 'sys' are initialized here, |
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91 they are needed by random bits of the interpreter. |
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92 All other modules are optional and should be initialized |
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93 by the initcalls() of a specific configuration. */ |
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94 |
| 86 | 95 initbuiltin(); /* Also initializes builtin exceptions */ |
| 96 initsys(); | |
| 6 | 97 |
| 86 | 98 initcalls(); /* Configuration-dependent initializations */ |
| 99 | |
| 100 initintr(); /* For intrcheck() */ | |
| 101 } | |
| 102 | |
| 103 /* Parse input from a file and execute it */ | |
| 104 | |
| 105 int | |
| 106 run(fp, filename) | |
| 107 FILE *fp; | |
| 108 char *filename; | |
| 109 { | |
| 110 if (filename == NULL) | |
| 111 filename = "???"; | |
| 112 if (isatty(fileno(fp))) | |
| 113 return run_tty_loop(fp, filename); | |
| 114 else | |
| 115 return run_script(fp, filename); | |
| 116 } | |
| 117 | |
| 118 int | |
| 119 run_tty_loop(fp, filename) | |
| 120 FILE *fp; | |
| 121 char *filename; | |
| 122 { | |
| 123 object *v; | |
| 124 int ret; | |
| 125 v = sysget("ps1"); | |
| 126 if (v == NULL) { | |
| 127 sysset("ps1", v = newstringobject(">>> ")); | |
| 128 XDECREF(v); | |
| 129 } | |
| 130 v = sysget("ps2"); | |
| 131 if (v == NULL) { | |
| 132 sysset("ps2", v = newstringobject("... ")); | |
| 133 XDECREF(v); | |
| 134 } | |
| 135 for (;;) { | |
| 136 ret = run_tty_1(fp, filename); | |
| 137 #ifdef REF_DEBUG | |
| 138 fprintf(stderr, "[%ld refs]\n", ref_total); | |
| 139 #endif | |
| 140 if (ret == E_EOF) | |
| 141 return 0; | |
| 142 /* | |
| 143 if (ret == E_NOMEM) | |
| 144 return -1; | |
| 145 */ | |
| 146 } | |
| 147 } | |
| 148 | |
| 149 int | |
| 150 run_tty_1(fp, filename) | |
| 151 FILE *fp; | |
| 152 char *filename; | |
| 153 { | |
| 154 object *m, *d, *v, *w; | |
| 155 node *n; | |
| 156 char *ps1, *ps2; | |
| 157 int err; | |
| 158 v = sysget("ps1"); | |
| 159 w = sysget("ps2"); | |
| 160 if (v != NULL && is_stringobject(v)) { | |
| 161 INCREF(v); | |
| 162 ps1 = getstringvalue(v); | |
| 163 } | |
| 164 else { | |
| 165 v = NULL; | |
| 166 ps1 = ""; | |
| 167 } | |
| 168 if (w != NULL && is_stringobject(w)) { | |
| 169 INCREF(w); | |
| 170 ps2 = getstringvalue(w); | |
| 6 | 171 } |
| 172 else { | |
| 86 | 173 w = NULL; |
| 174 ps2 = ""; | |
| 175 } | |
| 176 err = parsefile(fp, filename, &gram, single_input, ps1, ps2, &n); | |
| 177 XDECREF(v); | |
| 178 XDECREF(w); | |
| 179 if (err == E_EOF) | |
| 180 return E_EOF; | |
| 181 if (err != E_DONE) { | |
| 182 err_input(err); | |
| 183 print_error(); | |
| 184 return err; | |
| 185 } | |
| 186 m = add_module("__main__"); | |
| 187 if (m == NULL) | |
| 188 return -1; | |
| 189 d = getmoduledict(m); | |
| 190 v = run_node(n, filename, d, d); | |
| 191 flushline(); | |
| 192 if (v == NULL) { | |
| 193 print_error(); | |
| 194 return -1; | |
| 195 } | |
| 196 DECREF(v); | |
| 197 return 0; | |
| 198 } | |
| 199 | |
| 200 int | |
| 201 run_script(fp, filename) | |
| 202 FILE *fp; | |
| 203 char *filename; | |
| 204 { | |
| 205 object *m, *d, *v; | |
| 206 m = add_module("__main__"); | |
| 207 if (m == NULL) | |
| 208 return -1; | |
| 209 d = getmoduledict(m); | |
| 210 v = run_file(fp, filename, file_input, d, d); | |
| 211 flushline(); | |
| 212 if (v == NULL) { | |
| 213 print_error(); | |
| 214 return -1; | |
| 6 | 215 } |
| 86 | 216 DECREF(v); |
| 217 return 0; | |
| 218 } | |
| 219 | |
| 220 void | |
| 221 print_error() | |
| 222 { | |
| 223 object *exception, *v; | |
| 224 err_get(&exception, &v); | |
| 225 fprintf(stderr, "Unhandled exception: "); | |
| 226 printobject(exception, stderr, PRINT_RAW); | |
| 227 if (v != NULL && v != None) { | |
| 228 fprintf(stderr, ": "); | |
| 229 printobject(v, stderr, PRINT_RAW); | |
| 230 } | |
| 231 fprintf(stderr, "\n"); | |
| 232 XDECREF(exception); | |
| 233 XDECREF(v); | |
| 234 printtraceback(stderr); | |
| 235 } | |
| 236 | |
| 237 object * | |
| 238 run_string(str, start, globals, locals) | |
| 239 char *str; | |
| 240 int start; | |
| 241 /*dict*/object *globals, *locals; | |
| 242 { | |
| 243 node *n; | |
| 244 int err; | |
| 245 err = parse_string(str, start, &n); | |
| 246 return run_err_node(err, n, "<string>", globals, locals); | |
| 247 } | |
| 248 | |
| 249 object * | |
| 250 run_file(fp, filename, start, globals, locals) | |
| 251 FILE *fp; | |
| 252 char *filename; | |
| 253 int start; | |
| 254 /*dict*/object *globals, *locals; | |
| 255 { | |
| 256 node *n; | |
| 257 int err; | |
| 258 err = parse_file(fp, filename, start, &n); | |
| 259 return run_err_node(err, n, filename, globals, locals); | |
| 6 | 260 } |
| 261 | |
| 86 | 262 object * |
| 263 run_err_node(err, n, filename, globals, locals) | |
| 264 int err; | |
| 265 node *n; | |
| 266 char *filename; | |
| 267 /*dict*/object *globals, *locals; | |
| 268 { | |
| 269 if (err != E_DONE) { | |
| 270 err_input(err); | |
| 271 return NULL; | |
| 272 } | |
| 273 return run_node(n, filename, globals, locals); | |
| 274 } | |
| 275 | |
| 276 object * | |
| 277 run_node(n, filename, globals, locals) | |
| 278 node *n; | |
| 279 char *filename; | |
| 280 /*dict*/object *globals, *locals; | |
| 281 { | |
| 282 if (globals == NULL) { | |
| 283 globals = getglobals(); | |
| 284 if (locals == NULL) | |
| 285 locals = getlocals(); | |
| 286 } | |
| 287 else { | |
| 288 if (locals == NULL) | |
| 289 locals = globals; | |
| 290 } | |
| 291 return eval_node(n, filename, globals, locals); | |
| 292 } | |
| 293 | |
| 294 object * | |
| 295 eval_node(n, filename, globals, locals) | |
| 296 node *n; | |
| 297 char *filename; | |
| 298 object *globals; | |
| 299 object *locals; | |
| 300 { | |
| 301 codeobject *co; | |
| 302 object *v; | |
| 303 co = compile(n, filename); | |
| 304 freetree(n); | |
| 305 if (co == NULL) | |
| 306 return NULL; | |
| 307 v = eval_code(co, globals, locals, (object *)NULL); | |
| 308 DECREF(co); | |
| 309 return v; | |
| 310 } | |
| 311 | |
| 312 /* Simplified interface to parsefile */ | |
| 313 | |
| 314 int | |
| 315 parse_file(fp, filename, start, n_ret) | |
| 316 FILE *fp; | |
| 317 char *filename; | |
| 318 int start; | |
| 319 node **n_ret; | |
| 320 { | |
| 321 return parsefile(fp, filename, &gram, start, | |
| 322 (char *)0, (char *)0, n_ret); | |
| 323 } | |
| 324 | |
| 325 /* Simplified interface to parsestring */ | |
| 326 | |
| 327 int | |
| 328 parse_string(str, start, n_ret) | |
| 329 char *str; | |
| 330 int start; | |
| 331 node **n_ret; | |
| 332 { | |
| 333 int err = parsestring(str, &gram, start, n_ret); | |
| 334 /* Don't confuse early end of string with early end of input */ | |
| 335 if (err == E_EOF) | |
| 336 err = E_SYNTAX; | |
| 337 return err; | |
| 338 } | |
| 339 | |
| 340 /* Print fatal error message and abort */ | |
| 341 | |
| 342 void | |
| 343 fatal(msg) | |
| 344 char *msg; | |
| 345 { | |
| 346 fprintf(stderr, "Fatal error: %s\n", msg); | |
| 347 abort(); | |
| 348 } | |
| 349 | |
| 350 /* Clean up and exit */ | |
| 351 | |
| 352 void | |
| 6 | 353 goaway(sts) |
| 354 int sts; | |
| 355 { | |
| 86 | 356 flushline(); |
| 357 | |
| 358 /* XXX Call doneimport() before donecalls(), since donecalls() | |
| 359 calls wdone(), and doneimport() may close windows */ | |
| 360 doneimport(); | |
| 361 donecalls(); | |
| 362 | |
| 363 err_clear(); | |
| 364 | |
| 365 #ifdef REF_DEBUG | |
| 366 fprintf(stderr, "[%ld refs]\n", ref_total); | |
| 367 #endif | |
| 368 | |
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parents:
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diff
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369 #ifdef THINK_C_3_0 |
| 6 | 370 if (sts == 0) |
| 371 Click_On(0); | |
| 372 #endif | |
| 86 | 373 |
| 374 #ifdef TRACE_REFS | |
| 375 if (askyesno("Print left references?")) { | |
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dac8625c8d9b
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parents:
86
diff
changeset
|
376 #ifdef THINK_C_3_0 |
| 86 | 377 Click_On(1); |
| 378 #endif | |
| 379 printrefs(stderr); | |
| 380 } | |
| 381 #endif /* TRACE_REFS */ | |
| 382 | |
| 6 | 383 exit(sts); |
| 384 /*NOTREACHED*/ | |
| 385 } | |
| 386 | |
| 86 | 387 static |
| 388 finaloutput() | |
| 6 | 389 { |
| 86 | 390 #ifdef TRACE_REFS |
| 391 if (!askyesno("Print left references?")) | |
| 392 return; | |
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dac8625c8d9b
Changes for THINK C 4.0.
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parents:
86
diff
changeset
|
393 #ifdef THINK_C_3_0 |
| 86 | 394 Click_On(1); |
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94
dac8625c8d9b
Changes for THINK C 4.0.
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parents:
86
diff
changeset
|
395 #endif |
| 86 | 396 printrefs(stderr); |
| 397 #endif /* TRACE_REFS */ | |
| 6 | 398 } |
| 399 | |
| 400 /* Ask a yes/no question */ | |
| 401 | |
| 86 | 402 static int |
| 6 | 403 askyesno(prompt) |
| 404 char *prompt; | |
| 405 { | |
| 406 char buf[256]; | |
| 407 | |
| 408 printf("%s [ny] ", prompt); | |
| 409 if (fgets(buf, sizeof buf, stdin) == NULL) | |
| 410 return 0; | |
| 411 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 412 } | |
| 413 | |
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parents:
86
diff
changeset
|
414 #ifdef THINK_C_3_0 |
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70
a36c348a8e1a
Moved configuration-dependent initializations (etc.) to config_*.c
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parents:
16
diff
changeset
|
415 |
| 6 | 416 /* Check for file descriptor connected to interactive device. |
| 417 Pretend that stdin is always interactive, other files never. */ | |
| 418 | |
| 419 int | |
| 420 isatty(fd) | |
| 421 int fd; | |
| 422 { | |
| 423 return fd == fileno(stdin); | |
| 424 } | |
| 425 | |
| 426 #endif | |
| 427 | |
| 86 | 428 /* XXX WISH LIST |
| 6 | 429 |
| 430 - possible new types: | |
| 431 - iterator (for range, keys, ...) | |
| 432 - improve interpreter error handling, e.g., true tracebacks | |
| 433 - save precompiled modules on file? | |
| 434 - fork threads, locking | |
| 435 - allow syntax extensions | |
| 436 */ | |
| 86 | 437 |
| 438 /* "Floccinaucinihilipilification" */ |