Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 1 | /*********************************************************** |
| 2 | Copyright 1991, 1992 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 | |
| 25 | /* Python interpreter top-level routines, including init/exit */ |
| 26 | |
| 27 | #include "allobjects.h" |
| 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" |
| 35 | #include "compile.h" |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 36 | #include "eval.h" |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 37 | #include "ceval.h" |
| 38 | #include "pythonrun.h" |
| 39 | #include "import.h" |
| 40 | |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 41 | extern char *getpythonpath(); |
| 42 | |
| 43 | extern grammar gram; /* From graminit.c */ |
| 44 | |
| 45 | int debugging; /* Needed by parser.c */ |
| 46 | int verbose; /* Needed by import.c */ |
| 47 | |
| 48 | /* Initialize all */ |
| 49 | |
| 50 | void |
| 51 | initall() |
| 52 | { |
| 53 | static int inited; |
| 54 | |
| 55 | if (inited) |
| 56 | return; |
| 57 | inited = 1; |
| 58 | |
| 59 | initimport(); |
| 60 | |
| 61 | /* Modules 'builtin' and 'sys' are initialized here, |
| 62 | they are needed by random bits of the interpreter. |
| 63 | All other modules are optional and are initialized |
| 64 | when they are first imported. */ |
| 65 | |
| 66 | initbuiltin(); /* Also initializes builtin exceptions */ |
| 67 | initsys(); |
| 68 | |
| 69 | initcalls(); /* Configuration-dependent initializations */ |
| 70 | |
| 71 | initintr(); /* For intrcheck() */ |
| 72 | |
| 73 | setpythonpath(getpythonpath()); |
| 74 | } |
| 75 | |
| 76 | /* Parse input from a file and execute it */ |
| 77 | |
| 78 | int |
| 79 | run(fp, filename) |
| 80 | FILE *fp; |
| 81 | char *filename; |
| 82 | { |
| 83 | if (filename == NULL) |
| 84 | filename = "???"; |
| 85 | if (isatty((int)fileno(fp))) |
| 86 | return run_tty_loop(fp, filename); |
| 87 | else |
| 88 | return run_script(fp, filename); |
| 89 | } |
| 90 | |
| 91 | int |
| 92 | run_tty_loop(fp, filename) |
| 93 | FILE *fp; |
| 94 | char *filename; |
| 95 | { |
| 96 | object *v; |
| 97 | int ret; |
| 98 | v = sysget("ps1"); |
| 99 | if (v == NULL) { |
| 100 | sysset("ps1", v = newstringobject(">>> ")); |
| 101 | XDECREF(v); |
| 102 | } |
| 103 | v = sysget("ps2"); |
| 104 | if (v == NULL) { |
| 105 | sysset("ps2", v = newstringobject("... ")); |
| 106 | XDECREF(v); |
| 107 | } |
| 108 | for (;;) { |
| 109 | ret = run_tty_1(fp, filename); |
| 110 | #ifdef REF_DEBUG |
| 111 | fprintf(stderr, "[%ld refs]\n", ref_total); |
| 112 | #endif |
| 113 | if (ret == E_EOF) |
| 114 | return 0; |
| 115 | /* |
| 116 | if (ret == E_NOMEM) |
| 117 | return -1; |
| 118 | */ |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | int |
| 123 | run_tty_1(fp, filename) |
| 124 | FILE *fp; |
| 125 | char *filename; |
| 126 | { |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 127 | object *m, *d, *v, *w; |
| 128 | node *n; |
| 129 | char *ps1, *ps2; |
| 130 | int err; |
| 131 | v = sysget("ps1"); |
| 132 | w = sysget("ps2"); |
| 133 | if (v != NULL && is_stringobject(v)) { |
| 134 | INCREF(v); |
| 135 | ps1 = getstringvalue(v); |
| 136 | } |
| 137 | else { |
| 138 | v = NULL; |
| 139 | ps1 = ""; |
| 140 | } |
| 141 | if (w != NULL && is_stringobject(w)) { |
| 142 | INCREF(w); |
| 143 | ps2 = getstringvalue(w); |
| 144 | } |
| 145 | else { |
| 146 | w = NULL; |
| 147 | ps2 = ""; |
| 148 | } |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 149 | BGN_SAVE |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 150 | err = parsefile(fp, filename, &gram, single_input, ps1, ps2, &n); |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 151 | END_SAVE |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 152 | XDECREF(v); |
| 153 | XDECREF(w); |
| 154 | if (err == E_EOF) |
| 155 | return E_EOF; |
| 156 | if (err != E_DONE) { |
| 157 | err_input(err); |
| 158 | print_error(); |
| 159 | return err; |
| 160 | } |
| 161 | m = add_module("__main__"); |
| 162 | if (m == NULL) |
| 163 | return -1; |
| 164 | d = getmoduledict(m); |
| 165 | v = run_node(n, filename, d, d); |
| 166 | flushline(); |
| 167 | if (v == NULL) { |
| 168 | print_error(); |
| 169 | return -1; |
| 170 | } |
| 171 | DECREF(v); |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | int |
| 176 | run_script(fp, filename) |
| 177 | FILE *fp; |
| 178 | char *filename; |
| 179 | { |
| 180 | object *m, *d, *v; |
| 181 | m = add_module("__main__"); |
| 182 | if (m == NULL) |
| 183 | return -1; |
| 184 | d = getmoduledict(m); |
| 185 | v = run_file(fp, filename, file_input, d, d); |
| 186 | flushline(); |
| 187 | if (v == NULL) { |
| 188 | print_error(); |
| 189 | return -1; |
| 190 | } |
| 191 | DECREF(v); |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | int |
| 196 | run_command(command) |
| 197 | char *command; |
| 198 | { |
| 199 | object *m, *d, *v; |
| 200 | m = add_module("__main__"); |
| 201 | if (m == NULL) |
| 202 | return -1; |
| 203 | d = getmoduledict(m); |
| 204 | v = run_string(command, file_input, d, d); |
| 205 | flushline(); |
| 206 | if (v == NULL) { |
| 207 | print_error(); |
| 208 | return -1; |
| 209 | } |
| 210 | DECREF(v); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | void |
| 215 | print_error() |
| 216 | { |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame^] | 217 | object *exception, *v, *f; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 218 | err_get(&exception, &v); |
| 219 | if (exception == SystemExit) { |
| 220 | if (v == NULL || v == None) |
| 221 | goaway(0); |
| 222 | if (is_intobject(v)) |
| 223 | goaway((int)getintvalue(v)); |
| 224 | else { |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame^] | 225 | /* OK to use real stderr here */ |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 226 | printobject(v, stderr, PRINT_RAW); |
| 227 | fprintf(stderr, "\n"); |
| 228 | goaway(1); |
| 229 | } |
| 230 | } |
| 231 | sysset("last_type", exception); |
| 232 | sysset("last_value", v); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame^] | 233 | f = sysget("stderr"); |
| 234 | if (f == NULL) |
| 235 | fprintf(stderr, "lost sys.stderr\n"); |
| 236 | else { |
| 237 | if (writeobject(exception, f, PRINT_RAW) != 0) |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 238 | err_clear(); |
Guido van Rossum | 3165fe6 | 1992-09-25 21:59:05 +0000 | [diff] [blame^] | 239 | if (v != NULL && v != None) { |
| 240 | writestring(": ", f); |
| 241 | if (writeobject(v, f, PRINT_RAW) != 0) |
| 242 | err_clear(); |
| 243 | } |
| 244 | writestring("\n", f); |
| 245 | printtraceback(f); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 246 | } |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 247 | XDECREF(exception); |
| 248 | XDECREF(v); |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | object * |
| 252 | run_string(str, start, globals, locals) |
| 253 | char *str; |
| 254 | int start; |
| 255 | /*dict*/object *globals, *locals; |
| 256 | { |
| 257 | node *n; |
| 258 | int err; |
| 259 | err = parse_string(str, start, &n); |
| 260 | return run_err_node(err, n, "<string>", globals, locals); |
| 261 | } |
| 262 | |
| 263 | object * |
| 264 | run_file(fp, filename, start, globals, locals) |
| 265 | FILE *fp; |
| 266 | char *filename; |
| 267 | int start; |
| 268 | /*dict*/object *globals, *locals; |
| 269 | { |
| 270 | node *n; |
| 271 | int err; |
| 272 | err = parse_file(fp, filename, start, &n); |
| 273 | return run_err_node(err, n, filename, globals, locals); |
| 274 | } |
| 275 | |
| 276 | object * |
| 277 | run_err_node(err, n, filename, globals, locals) |
| 278 | int err; |
| 279 | node *n; |
| 280 | char *filename; |
| 281 | /*dict*/object *globals, *locals; |
| 282 | { |
| 283 | if (err != E_DONE) { |
| 284 | err_input(err); |
| 285 | return NULL; |
| 286 | } |
| 287 | return run_node(n, filename, globals, locals); |
| 288 | } |
| 289 | |
| 290 | object * |
| 291 | run_node(n, filename, globals, locals) |
| 292 | node *n; |
| 293 | char *filename; |
| 294 | /*dict*/object *globals, *locals; |
| 295 | { |
| 296 | if (globals == NULL) { |
| 297 | globals = getglobals(); |
| 298 | if (locals == NULL) |
| 299 | locals = getlocals(); |
| 300 | } |
| 301 | else { |
| 302 | if (locals == NULL) |
| 303 | locals = globals; |
| 304 | } |
| 305 | return eval_node(n, filename, globals, locals); |
| 306 | } |
| 307 | |
| 308 | object * |
| 309 | eval_node(n, filename, globals, locals) |
| 310 | node *n; |
| 311 | char *filename; |
| 312 | object *globals; |
| 313 | object *locals; |
| 314 | { |
| 315 | codeobject *co; |
| 316 | object *v; |
| 317 | co = compile(n, filename); |
| 318 | freetree(n); |
| 319 | if (co == NULL) |
| 320 | return NULL; |
| 321 | v = eval_code(co, globals, locals, (object *)NULL); |
| 322 | DECREF(co); |
| 323 | return v; |
| 324 | } |
| 325 | |
| 326 | /* Simplified interface to parsefile */ |
| 327 | |
| 328 | int |
| 329 | parse_file(fp, filename, start, n_ret) |
| 330 | FILE *fp; |
| 331 | char *filename; |
| 332 | int start; |
| 333 | node **n_ret; |
| 334 | { |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 335 | int ret; |
| 336 | BGN_SAVE |
| 337 | ret = parsefile(fp, filename, &gram, start, |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 338 | (char *)0, (char *)0, n_ret); |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 339 | END_SAVE |
| 340 | return ret; |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | /* Simplified interface to parsestring */ |
| 344 | |
| 345 | int |
| 346 | parse_string(str, start, n_ret) |
| 347 | char *str; |
| 348 | int start; |
| 349 | node **n_ret; |
| 350 | { |
| 351 | int err = parsestring(str, &gram, start, n_ret); |
| 352 | /* Don't confuse early end of string with early end of input */ |
| 353 | if (err == E_EOF) |
| 354 | err = E_SYNTAX; |
| 355 | return err; |
| 356 | } |
| 357 | |
| 358 | /* Print fatal error message and abort */ |
| 359 | |
| 360 | void |
| 361 | fatal(msg) |
| 362 | char *msg; |
| 363 | { |
| 364 | fprintf(stderr, "Fatal error: %s\n", msg); |
| 365 | abort(); |
| 366 | } |
| 367 | |
| 368 | /* Clean up and exit */ |
| 369 | |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 370 | #ifdef USE_THREAD |
| 371 | extern int threads_started; |
| 372 | #endif |
| 373 | |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 374 | void |
| 375 | goaway(sts) |
| 376 | int sts; |
| 377 | { |
Guido van Rossum | 59bff39 | 1992-09-03 20:28:00 +0000 | [diff] [blame] | 378 | object *exitfunc = sysget("exitfunc"); |
| 379 | |
| 380 | if (exitfunc) { |
| 381 | object *arg; |
| 382 | object *res; |
| 383 | sysset("exitfunc", (object *)NULL); |
| 384 | arg = newtupleobject(0); |
| 385 | if (arg == NULL) |
| 386 | res = NULL; |
| 387 | else { |
| 388 | res = call_object(exitfunc, arg); |
| 389 | DECREF(arg); |
| 390 | } |
| 391 | if (res == NULL) { |
| 392 | fprintf(stderr, "Error in sys.exitfunc:\n"); |
| 393 | print_error(); |
| 394 | } |
| 395 | } |
| 396 | |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 397 | flushline(); |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 398 | |
| 399 | #ifdef USE_THREAD |
| 400 | |
| 401 | /* Other threads may still be active, so skip most of the |
| 402 | cleanup actions usually done (these are mostly for |
| 403 | debugging anyway). */ |
| 404 | |
Guido van Rossum | df72a65 | 1992-08-12 15:27:32 +0000 | [diff] [blame] | 405 | (void) save_thread(); |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 406 | donecalls(); |
Guido van Rossum | f9f2e82 | 1992-08-17 08:59:08 +0000 | [diff] [blame] | 407 | if (threads_started) |
| 408 | _exit_prog(sts); |
| 409 | else |
| 410 | exit_prog(sts); |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 411 | |
| 412 | #else /* USE_THREAD */ |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 413 | |
| 414 | /* XXX Call doneimport() before donecalls(), since donecalls() |
| 415 | calls wdone(), and doneimport() may close windows */ |
| 416 | doneimport(); |
| 417 | donecalls(); |
| 418 | |
| 419 | err_clear(); |
| 420 | |
| 421 | #ifdef REF_DEBUG |
| 422 | fprintf(stderr, "[%ld refs]\n", ref_total); |
| 423 | #endif |
| 424 | |
| 425 | #ifdef TRACE_REFS |
| 426 | if (askyesno("Print left references?")) { |
| 427 | printrefs(stderr); |
| 428 | } |
| 429 | #endif /* TRACE_REFS */ |
| 430 | |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 431 | exit(sts); |
Guido van Rossum | ff4949e | 1992-08-05 19:58:53 +0000 | [diff] [blame] | 432 | #endif /* USE_THREAD */ |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 433 | /*NOTREACHED*/ |
| 434 | } |
| 435 | |
| 436 | #ifdef TRACE_REFS |
| 437 | /* Ask a yes/no question */ |
| 438 | |
Guido van Rossum | 59bff39 | 1992-09-03 20:28:00 +0000 | [diff] [blame] | 439 | int |
Guido van Rossum | 1984f1e | 1992-08-04 12:41:02 +0000 | [diff] [blame] | 440 | askyesno(prompt) |
| 441 | char *prompt; |
| 442 | { |
| 443 | char buf[256]; |
| 444 | |
| 445 | printf("%s [ny] ", prompt); |
| 446 | if (fgets(buf, sizeof buf, stdin) == NULL) |
| 447 | return 0; |
| 448 | return buf[0] == 'y' || buf[0] == 'Y'; |
| 449 | } |
| 450 | #endif |
| 451 | |
| 452 | #ifdef applec /* MPW (also usable for Think C 3.0) */ |
| 453 | |
| 454 | /* Check for file descriptor connected to interactive device. |
| 455 | Pretend that stdin is always interactive, other files never. */ |
| 456 | |
| 457 | int |
| 458 | isatty(fd) |
| 459 | int fd; |
| 460 | { |
| 461 | return fd == fileno(stdin); |
| 462 | } |
| 463 | |
| 464 | #endif |