Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1 | /* Python interpreter main program */ |
| 2 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 3 | #include "allobjects.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 4 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 5 | #include "grammar.h" |
| 6 | #include "node.h" |
| 7 | #include "parsetok.h" |
| 8 | #include "graminit.h" |
| 9 | #include "errcode.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 10 | #include "sysmodule.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 11 | #include "compile.h" |
| 12 | #include "ceval.h" |
| 13 | #include "pythonrun.h" |
| 14 | #include "import.h" |
| 15 | |
| 16 | extern char *getpythonpath(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 17 | |
| 18 | extern grammar gram; /* From graminit.c */ |
| 19 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 20 | #ifdef DEBUG |
| 21 | int debugging; /* Needed by parser.c */ |
| 22 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 23 | |
| 24 | main(argc, argv) |
| 25 | int argc; |
| 26 | char **argv; |
| 27 | { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 28 | char *filename = NULL; |
| 29 | FILE *fp = stdin; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 30 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 31 | initargs(&argc, &argv); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 32 | |
| 33 | if (argc > 1 && strcmp(argv[1], "-") != 0) |
| 34 | filename = argv[1]; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 35 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 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 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 44 | initall(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 45 | |
Guido van Rossum | da0c6bd | 1990-11-18 17:28:24 +0000 | [diff] [blame] | 46 | setpythonpath(getpythonpath()); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 47 | setpythonargv(argc-1, argv+1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 48 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 49 | goaway(run(fp, filename == NULL ? "<stdin>" : filename)); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 50 | /*NOTREACHED*/ |
| 51 | } |
| 52 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 53 | /* Initialize all */ |
| 54 | |
| 55 | void |
| 56 | initall() |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 57 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 58 | static int inited; |
| 59 | |
| 60 | if (inited) |
| 61 | return; |
| 62 | |
| 63 | initimport(); |
| 64 | |
| 65 | initbuiltin(); /* Also initializes builtin exceptions */ |
| 66 | initsys(); |
| 67 | inittime(); |
| 68 | initmath(); |
| 69 | |
| 70 | initcalls(); /* Configuration-dependent initializations */ |
| 71 | |
| 72 | initintr(); /* For intrcheck() */ |
| 73 | |
| 74 | inited = 1; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | /* Parse input from a file and execute it */ |
| 78 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 79 | int |
| 80 | run(fp, filename) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 81 | FILE *fp; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 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; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 130 | char *ps1, *ps2; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 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); |
| 145 | } |
| 146 | else { |
| 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; |
| 189 | } |
| 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; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 216 | { |
| 217 | node *n; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 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); |
| 234 | } |
| 235 | |
| 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 |
| 327 | goaway(sts) |
| 328 | int sts; |
| 329 | { |
| 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 | |
| 343 | #ifdef THINK_C |
| 344 | if (sts == 0) |
| 345 | Click_On(0); |
| 346 | #endif |
| 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 | |
| 357 | exit(sts); |
| 358 | /*NOTREACHED*/ |
| 359 | } |
| 360 | |
| 361 | static |
| 362 | finaloutput() |
| 363 | { |
| 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 */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 372 | } |
| 373 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 374 | /* Ask a yes/no question */ |
| 375 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 376 | static int |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 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 | |
Guido van Rossum | da0c6bd | 1990-11-18 17:28:24 +0000 | [diff] [blame] | 388 | #ifdef THINK_C |
| 389 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 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 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 400 | #endif |
| 401 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 402 | /* XXX WISH LIST |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 403 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 404 | - possible new types: |
| 405 | - iterator (for range, keys, ...) |
| 406 | - improve interpreter error handling, e.g., true tracebacks |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 407 | - save precompiled modules on file? |
| 408 | - fork threads, locking |
| 409 | - allow syntax extensions |
| 410 | */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 411 | |
| 412 | /* "Floccinaucinihilipilification" */ |