Mercurial > cpython-lru_cache-weakref
annotate Python/pythonmain.c @ 86:a6934380c6e7 legacy-trunk
"Compiling" version
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Thu, 20 Dec 1990 15:06:42 +0000 |
| parents | de34f4a4d353 |
| children | dac8625c8d9b |
| rev | line source |
|---|---|
| 6 | 1 /* Python interpreter main program */ |
| 2 | |
| 86 | 3 #include "allobjects.h" |
| 6 | 4 |
| 5 #include "grammar.h" | |
| 6 #include "node.h" | |
| 7 #include "parsetok.h" | |
| 8 #include "graminit.h" | |
| 9 #include "errcode.h" | |
| 10 #include "sysmodule.h" | |
| 86 | 11 #include "compile.h" |
| 12 #include "ceval.h" | |
| 13 #include "pythonrun.h" | |
| 14 #include "import.h" | |
| 15 | |
| 16 extern char *getpythonpath(); | |
| 6 | 17 |
| 18 extern grammar gram; /* From graminit.c */ | |
| 19 | |
| 86 | 20 #ifdef DEBUG |
| 21 int debugging; /* Needed by parser.c */ | |
| 22 #endif | |
| 6 | 23 |
| 24 main(argc, argv) | |
| 25 int argc; | |
| 26 char **argv; | |
| 27 { | |
| 28 char *filename = NULL; | |
| 29 FILE *fp = stdin; | |
| 86 | 30 |
|
70
a36c348a8e1a
Moved configuration-dependent initializations (etc.) to config_*.c
Guido van Rossum <guido@python.org>
parents:
16
diff
changeset
|
31 initargs(&argc, &argv); |
| 6 | 32 |
| 33 if (argc > 1 && strcmp(argv[1], "-") != 0) | |
| 34 filename = argv[1]; | |
| 86 | 35 |
| 6 | 36 if (filename != NULL) { |
| 37 if ((fp = fopen(filename, "r")) == NULL) { | |
| 38 fprintf(stderr, "python: can't open file '%s'\n", | |
| 39 filename); | |
| 40 exit(2); | |
| 41 } | |
| 42 } | |
| 43 | |
| 86 | 44 initall(); |
| 45 | |
| 46 setpythonpath(getpythonpath()); | |
| 47 setpythonargv(argc-1, argv+1); | |
| 6 | 48 |
| 86 | 49 goaway(run(fp, filename == NULL ? "<stdin>" : filename)); |
| 50 /*NOTREACHED*/ | |
| 51 } | |
| 52 | |
| 53 /* Initialize all */ | |
| 54 | |
| 55 void | |
| 56 initall() | |
| 57 { | |
| 58 static int inited; | |
| 59 | |
| 60 if (inited) | |
| 61 return; | |
| 62 | |
| 63 initimport(); | |
| 64 | |
| 65 initbuiltin(); /* Also initializes builtin exceptions */ | |
| 66 initsys(); | |
| 6 | 67 inittime(); |
| 68 initmath(); | |
| 69 | |
| 86 | 70 initcalls(); /* Configuration-dependent initializations */ |
| 71 | |
| 72 initintr(); /* For intrcheck() */ | |
| 6 | 73 |
| 86 | 74 inited = 1; |
| 75 } | |
| 76 | |
| 77 /* Parse input from a file and execute it */ | |
| 78 | |
| 79 int | |
| 80 run(fp, filename) | |
| 81 FILE *fp; | |
| 82 char *filename; | |
| 83 { | |
| 84 if (filename == NULL) | |
| 85 filename = "???"; | |
| 86 if (isatty(fileno(fp))) | |
| 87 return run_tty_loop(fp, filename); | |
| 88 else | |
| 89 return run_script(fp, filename); | |
| 90 } | |
| 91 | |
| 92 int | |
| 93 run_tty_loop(fp, filename) | |
| 94 FILE *fp; | |
| 95 char *filename; | |
| 96 { | |
| 97 object *v; | |
| 98 int ret; | |
| 99 v = sysget("ps1"); | |
| 100 if (v == NULL) { | |
| 101 sysset("ps1", v = newstringobject(">>> ")); | |
| 102 XDECREF(v); | |
| 103 } | |
| 104 v = sysget("ps2"); | |
| 105 if (v == NULL) { | |
| 106 sysset("ps2", v = newstringobject("... ")); | |
| 107 XDECREF(v); | |
| 108 } | |
| 109 for (;;) { | |
| 110 ret = run_tty_1(fp, filename); | |
| 111 #ifdef REF_DEBUG | |
| 112 fprintf(stderr, "[%ld refs]\n", ref_total); | |
| 113 #endif | |
| 114 if (ret == E_EOF) | |
| 115 return 0; | |
| 116 /* | |
| 117 if (ret == E_NOMEM) | |
| 118 return -1; | |
| 119 */ | |
| 120 } | |
| 121 } | |
| 122 | |
| 123 int | |
| 124 run_tty_1(fp, filename) | |
| 125 FILE *fp; | |
| 126 char *filename; | |
| 127 { | |
| 128 object *m, *d, *v, *w; | |
| 129 node *n; | |
| 130 char *ps1, *ps2; | |
| 131 int err; | |
| 132 v = sysget("ps1"); | |
| 133 w = sysget("ps2"); | |
| 134 if (v != NULL && is_stringobject(v)) { | |
| 135 INCREF(v); | |
| 136 ps1 = getstringvalue(v); | |
| 137 } | |
| 138 else { | |
| 139 v = NULL; | |
| 140 ps1 = ""; | |
| 141 } | |
| 142 if (w != NULL && is_stringobject(w)) { | |
| 143 INCREF(w); | |
| 144 ps2 = getstringvalue(w); | |
| 6 | 145 } |
| 146 else { | |
| 86 | 147 w = NULL; |
| 148 ps2 = ""; | |
| 149 } | |
| 150 err = parsefile(fp, filename, &gram, single_input, ps1, ps2, &n); | |
| 151 XDECREF(v); | |
| 152 XDECREF(w); | |
| 153 if (err == E_EOF) | |
| 154 return E_EOF; | |
| 155 if (err != E_DONE) { | |
| 156 err_input(err); | |
| 157 print_error(); | |
| 158 return err; | |
| 159 } | |
| 160 m = add_module("__main__"); | |
| 161 if (m == NULL) | |
| 162 return -1; | |
| 163 d = getmoduledict(m); | |
| 164 v = run_node(n, filename, d, d); | |
| 165 flushline(); | |
| 166 if (v == NULL) { | |
| 167 print_error(); | |
| 168 return -1; | |
| 169 } | |
| 170 DECREF(v); | |
| 171 return 0; | |
| 172 } | |
| 173 | |
| 174 int | |
| 175 run_script(fp, filename) | |
| 176 FILE *fp; | |
| 177 char *filename; | |
| 178 { | |
| 179 object *m, *d, *v; | |
| 180 m = add_module("__main__"); | |
| 181 if (m == NULL) | |
| 182 return -1; | |
| 183 d = getmoduledict(m); | |
| 184 v = run_file(fp, filename, file_input, d, d); | |
| 185 flushline(); | |
| 186 if (v == NULL) { | |
| 187 print_error(); | |
| 188 return -1; | |
| 6 | 189 } |
| 86 | 190 DECREF(v); |
| 191 return 0; | |
| 192 } | |
| 193 | |
| 194 void | |
| 195 print_error() | |
| 196 { | |
| 197 object *exception, *v; | |
| 198 err_get(&exception, &v); | |
| 199 fprintf(stderr, "Unhandled exception: "); | |
| 200 printobject(exception, stderr, PRINT_RAW); | |
| 201 if (v != NULL && v != None) { | |
| 202 fprintf(stderr, ": "); | |
| 203 printobject(v, stderr, PRINT_RAW); | |
| 204 } | |
| 205 fprintf(stderr, "\n"); | |
| 206 XDECREF(exception); | |
| 207 XDECREF(v); | |
| 208 printtraceback(stderr); | |
| 209 } | |
| 210 | |
| 211 object * | |
| 212 run_string(str, start, globals, locals) | |
| 213 char *str; | |
| 214 int start; | |
| 215 /*dict*/object *globals, *locals; | |
| 216 { | |
| 217 node *n; | |
| 218 int err; | |
| 219 err = parse_string(str, start, &n); | |
| 220 return run_err_node(err, n, "<string>", globals, locals); | |
| 221 } | |
| 222 | |
| 223 object * | |
| 224 run_file(fp, filename, start, globals, locals) | |
| 225 FILE *fp; | |
| 226 char *filename; | |
| 227 int start; | |
| 228 /*dict*/object *globals, *locals; | |
| 229 { | |
| 230 node *n; | |
| 231 int err; | |
| 232 err = parse_file(fp, filename, start, &n); | |
| 233 return run_err_node(err, n, filename, globals, locals); | |
| 6 | 234 } |
| 235 | |
| 86 | 236 object * |
| 237 run_err_node(err, n, filename, globals, locals) | |
| 238 int err; | |
| 239 node *n; | |
| 240 char *filename; | |
| 241 /*dict*/object *globals, *locals; | |
| 242 { | |
| 243 if (err != E_DONE) { | |
| 244 err_input(err); | |
| 245 return NULL; | |
| 246 } | |
| 247 return run_node(n, filename, globals, locals); | |
| 248 } | |
| 249 | |
| 250 object * | |
| 251 run_node(n, filename, globals, locals) | |
| 252 node *n; | |
| 253 char *filename; | |
| 254 /*dict*/object *globals, *locals; | |
| 255 { | |
| 256 if (globals == NULL) { | |
| 257 globals = getglobals(); | |
| 258 if (locals == NULL) | |
| 259 locals = getlocals(); | |
| 260 } | |
| 261 else { | |
| 262 if (locals == NULL) | |
| 263 locals = globals; | |
| 264 } | |
| 265 return eval_node(n, filename, globals, locals); | |
| 266 } | |
| 267 | |
| 268 object * | |
| 269 eval_node(n, filename, globals, locals) | |
| 270 node *n; | |
| 271 char *filename; | |
| 272 object *globals; | |
| 273 object *locals; | |
| 274 { | |
| 275 codeobject *co; | |
| 276 object *v; | |
| 277 co = compile(n, filename); | |
| 278 freetree(n); | |
| 279 if (co == NULL) | |
| 280 return NULL; | |
| 281 v = eval_code(co, globals, locals, (object *)NULL); | |
| 282 DECREF(co); | |
| 283 return v; | |
| 284 } | |
| 285 | |
| 286 /* Simplified interface to parsefile */ | |
| 287 | |
| 288 int | |
| 289 parse_file(fp, filename, start, n_ret) | |
| 290 FILE *fp; | |
| 291 char *filename; | |
| 292 int start; | |
| 293 node **n_ret; | |
| 294 { | |
| 295 return parsefile(fp, filename, &gram, start, | |
| 296 (char *)0, (char *)0, n_ret); | |
| 297 } | |
| 298 | |
| 299 /* Simplified interface to parsestring */ | |
| 300 | |
| 301 int | |
| 302 parse_string(str, start, n_ret) | |
| 303 char *str; | |
| 304 int start; | |
| 305 node **n_ret; | |
| 306 { | |
| 307 int err = parsestring(str, &gram, start, n_ret); | |
| 308 /* Don't confuse early end of string with early end of input */ | |
| 309 if (err == E_EOF) | |
| 310 err = E_SYNTAX; | |
| 311 return err; | |
| 312 } | |
| 313 | |
| 314 /* Print fatal error message and abort */ | |
| 315 | |
| 316 void | |
| 317 fatal(msg) | |
| 318 char *msg; | |
| 319 { | |
| 320 fprintf(stderr, "Fatal error: %s\n", msg); | |
| 321 abort(); | |
| 322 } | |
| 323 | |
| 324 /* Clean up and exit */ | |
| 325 | |
| 326 void | |
| 6 | 327 goaway(sts) |
| 328 int sts; | |
| 329 { | |
| 86 | 330 flushline(); |
| 331 | |
| 332 /* XXX Call doneimport() before donecalls(), since donecalls() | |
| 333 calls wdone(), and doneimport() may close windows */ | |
| 334 doneimport(); | |
| 335 donecalls(); | |
| 336 | |
| 337 err_clear(); | |
| 338 | |
| 339 #ifdef REF_DEBUG | |
| 340 fprintf(stderr, "[%ld refs]\n", ref_total); | |
| 341 #endif | |
| 342 | |
| 6 | 343 #ifdef THINK_C |
| 344 if (sts == 0) | |
| 345 Click_On(0); | |
| 346 #endif | |
| 86 | 347 |
| 348 #ifdef TRACE_REFS | |
| 349 if (askyesno("Print left references?")) { | |
| 350 #ifdef THINK_C | |
| 351 Click_On(1); | |
| 352 #endif | |
| 353 printrefs(stderr); | |
| 354 } | |
| 355 #endif /* TRACE_REFS */ | |
| 356 | |
| 6 | 357 exit(sts); |
| 358 /*NOTREACHED*/ | |
| 359 } | |
| 360 | |
| 86 | 361 static |
| 362 finaloutput() | |
| 6 | 363 { |
| 86 | 364 #ifdef TRACE_REFS |
| 365 if (!askyesno("Print left references?")) | |
| 366 return; | |
| 367 #ifdef THINK_C | |
| 368 Click_On(1); | |
| 369 #endif /* THINK_C */ | |
| 370 printrefs(stderr); | |
| 371 #endif /* TRACE_REFS */ | |
| 6 | 372 } |
| 373 | |
| 374 /* Ask a yes/no question */ | |
| 375 | |
| 86 | 376 static int |
| 6 | 377 askyesno(prompt) |
| 378 char *prompt; | |
| 379 { | |
| 380 char buf[256]; | |
| 381 | |
| 382 printf("%s [ny] ", prompt); | |
| 383 if (fgets(buf, sizeof buf, stdin) == NULL) | |
| 384 return 0; | |
| 385 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 386 } | |
| 387 | |
|
70
a36c348a8e1a
Moved configuration-dependent initializations (etc.) to config_*.c
Guido van Rossum <guido@python.org>
parents:
16
diff
changeset
|
388 #ifdef THINK_C |
|
a36c348a8e1a
Moved configuration-dependent initializations (etc.) to config_*.c
Guido van Rossum <guido@python.org>
parents:
16
diff
changeset
|
389 |
| 6 | 390 /* Check for file descriptor connected to interactive device. |
| 391 Pretend that stdin is always interactive, other files never. */ | |
| 392 | |
| 393 int | |
| 394 isatty(fd) | |
| 395 int fd; | |
| 396 { | |
| 397 return fd == fileno(stdin); | |
| 398 } | |
| 399 | |
| 400 #endif | |
| 401 | |
| 86 | 402 /* XXX WISH LIST |
| 6 | 403 |
| 404 - possible new types: | |
| 405 - iterator (for range, keys, ...) | |
| 406 - improve interpreter error handling, e.g., true tracebacks | |
| 407 - save precompiled modules on file? | |
| 408 - fork threads, locking | |
| 409 - allow syntax extensions | |
| 410 */ | |
| 86 | 411 |
| 412 /* "Floccinaucinihilipilification" */ |