Commit | Line | Data |
87250799 |
1 | /* $Header: cmd.c,v 3.0.1.8 90/08/09 02:28:49 lwall Locked $ |
a687059c |
2 | * |
3 | * Copyright (c) 1989, Larry Wall |
4 | * |
5 | * You may distribute under the terms of the GNU General Public License |
6 | * as specified in the README file that comes with the perl 3.0 kit. |
8d063cd8 |
7 | * |
8 | * $Log: cmd.c,v $ |
87250799 |
9 | * Revision 3.0.1.8 90/08/09 02:28:49 lwall |
10 | * patch19: did preliminary work toward debugging packages and evals |
11 | * patch19: conditionals now always supply a scalar context to expression |
12 | * patch19: switch optimizer was confused by negative fractional values |
13 | * |
21d892ea |
14 | * Revision 3.0.1.7 90/03/27 15:32:37 lwall |
15 | * patch16: non-terminal blocks should never have arrays requested of them |
16 | * |
ff2452de |
17 | * Revision 3.0.1.6 90/03/12 16:21:09 lwall |
18 | * patch13: fixed some backwards VOLATILE declarations |
19 | * patch13: while (s/x//) {} still caused some anomolies |
20 | * patch13: greater-than test of numeric switch structures did less-than action |
21 | * |
afd9f252 |
22 | * Revision 3.0.1.5 90/02/28 16:38:31 lwall |
23 | * patch9: volatilized some more variables for super-optimizing compilers |
24 | * patch9: nested foreach loops didn't reset inner loop on next to outer loop |
25 | * patch9: returned values were read from obsolete stack |
26 | * patch9: added sanity check on longjmp() return value |
27 | * patch9: substitutions that almost always succeed can corrupt label stack |
28 | * patch9: subs which return by both mechanisms can clobber local return data |
29 | * |
d8f2e4cc |
30 | * Revision 3.0.1.4 89/12/21 19:17:41 lwall |
31 | * patch7: arranged for certain registers to be restored after longjmp() |
32 | * patch7: made nested or recursive foreach work right |
33 | * |
0d3e774c |
34 | * Revision 3.0.1.3 89/11/17 15:04:36 lwall |
35 | * patch5: nested foreach on same array didn't work |
36 | * |
bf38876a |
37 | * Revision 3.0.1.2 89/11/11 04:08:56 lwall |
38 | * patch2: non-BSD machines required two ^D's for <> |
39 | * patch2: grow_dlevel() not inside #ifdef DEBUGGING |
40 | * |
03a14243 |
41 | * Revision 3.0.1.1 89/10/26 23:04:21 lwall |
42 | * patch1: heuristically disabled optimization could cause core dump |
43 | * |
a687059c |
44 | * Revision 3.0 89/10/18 15:09:02 lwall |
45 | * 3.0 baseline |
8d063cd8 |
46 | * |
47 | */ |
48 | |
8d063cd8 |
49 | #include "EXTERN.h" |
8d063cd8 |
50 | #include "perl.h" |
51 | |
a687059c |
52 | #ifdef I_VARARGS |
53 | # include <varargs.h> |
54 | #endif |
55 | |
8d063cd8 |
56 | static STR str_chop; |
57 | |
a687059c |
58 | void grow_dlevel(); |
59 | |
d8f2e4cc |
60 | /* do longjmps() clobber register variables? */ |
61 | |
62 | #if defined(cray) || defined(__STDC__) |
63 | #define JMPCLOBBER |
64 | #endif |
65 | |
8d063cd8 |
66 | /* This is the main command loop. We try to spend as much time in this loop |
67 | * as possible, so lots of optimizations do their activities in here. This |
68 | * means things get a little sloppy. |
69 | */ |
70 | |
a687059c |
71 | int |
d8f2e4cc |
72 | cmd_exec(cmdparm,gimme,sp) |
73 | CMD *VOLATILE cmdparm; |
afd9f252 |
74 | VOLATILE int gimme; |
75 | VOLATILE int sp; |
8d063cd8 |
76 | { |
d8f2e4cc |
77 | register CMD *cmd = cmdparm; |
78 | SPAT *VOLATILE oldspat; |
afd9f252 |
79 | VOLATILE int firstsave = savestack->ary_fill; |
d8f2e4cc |
80 | VOLATILE int oldsave; |
81 | VOLATILE int aryoptsave; |
8d063cd8 |
82 | #ifdef DEBUGGING |
d8f2e4cc |
83 | VOLATILE int olddlevel; |
84 | VOLATILE int entdlevel; |
8d063cd8 |
85 | #endif |
a687059c |
86 | register STR *retstr = &str_undef; |
8d063cd8 |
87 | register char *tmps; |
88 | register int cmdflags; |
378cc40b |
89 | register int match; |
8d063cd8 |
90 | register char *go_to = goto_targ; |
a687059c |
91 | register int newsp = -2; |
92 | register STR **st = stack->ary_array; |
ff2452de |
93 | FILE *VOLATILE fp; |
94 | ARRAY *VOLATILE ar; |
8d063cd8 |
95 | |
a687059c |
96 | lastsize = 0; |
8d063cd8 |
97 | #ifdef DEBUGGING |
98 | entdlevel = dlevel; |
99 | #endif |
100 | tail_recursion_entry: |
101 | #ifdef DEBUGGING |
102 | dlevel = entdlevel; |
103 | #endif |
a687059c |
104 | #ifdef TAINT |
105 | tainted = 0; /* Each statement is presumed innocent */ |
106 | #endif |
107 | if (cmd == Nullcmd) { |
108 | if (gimme == G_ARRAY && newsp > -2) |
109 | return newsp; |
110 | else { |
111 | st[++sp] = retstr; |
112 | return sp; |
113 | } |
114 | } |
8d063cd8 |
115 | cmdflags = cmd->c_flags; /* hopefully load register */ |
116 | if (go_to) { |
117 | if (cmd->c_label && strEQ(go_to,cmd->c_label)) |
118 | goto_targ = go_to = Nullch; /* here at last */ |
119 | else { |
120 | switch (cmd->c_type) { |
121 | case C_IF: |
122 | oldspat = curspat; |
378cc40b |
123 | oldsave = savestack->ary_fill; |
8d063cd8 |
124 | #ifdef DEBUGGING |
125 | olddlevel = dlevel; |
126 | #endif |
127 | retstr = &str_yes; |
a687059c |
128 | newsp = -2; |
8d063cd8 |
129 | if (cmd->ucmd.ccmd.cc_true) { |
130 | #ifdef DEBUGGING |
378cc40b |
131 | if (debug) { |
132 | debname[dlevel] = 't'; |
a687059c |
133 | debdelim[dlevel] = '_'; |
134 | if (++dlevel >= dlmax) |
135 | grow_dlevel(); |
378cc40b |
136 | } |
8d063cd8 |
137 | #endif |
21d892ea |
138 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
139 | st = stack->ary_array; /* possibly reallocated */ |
140 | retstr = st[newsp]; |
8d063cd8 |
141 | } |
a687059c |
142 | if (!goto_targ) |
8d063cd8 |
143 | go_to = Nullch; |
a687059c |
144 | curspat = oldspat; |
145 | if (savestack->ary_fill > oldsave) |
146 | restorelist(oldsave); |
8d063cd8 |
147 | #ifdef DEBUGGING |
a687059c |
148 | dlevel = olddlevel; |
8d063cd8 |
149 | #endif |
a687059c |
150 | cmd = cmd->ucmd.ccmd.cc_alt; |
151 | goto tail_recursion_entry; |
152 | case C_ELSE: |
153 | oldspat = curspat; |
154 | oldsave = savestack->ary_fill; |
155 | #ifdef DEBUGGING |
156 | olddlevel = dlevel; |
157 | #endif |
158 | retstr = &str_undef; |
159 | newsp = -2; |
160 | if (cmd->ucmd.ccmd.cc_true) { |
161 | #ifdef DEBUGGING |
162 | if (debug) { |
163 | debname[dlevel] = 'e'; |
164 | debdelim[dlevel] = '_'; |
165 | if (++dlevel >= dlmax) |
166 | grow_dlevel(); |
8d063cd8 |
167 | } |
a687059c |
168 | #endif |
21d892ea |
169 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
170 | st = stack->ary_array; /* possibly reallocated */ |
171 | retstr = st[newsp]; |
8d063cd8 |
172 | } |
173 | if (!goto_targ) |
174 | go_to = Nullch; |
175 | curspat = oldspat; |
378cc40b |
176 | if (savestack->ary_fill > oldsave) |
177 | restorelist(oldsave); |
8d063cd8 |
178 | #ifdef DEBUGGING |
179 | dlevel = olddlevel; |
180 | #endif |
181 | break; |
182 | case C_BLOCK: |
183 | case C_WHILE: |
184 | if (!(cmdflags & CF_ONCE)) { |
185 | cmdflags |= CF_ONCE; |
a687059c |
186 | if (++loop_ptr >= loop_max) { |
187 | loop_max += 128; |
188 | Renew(loop_stack, loop_max, struct loop); |
189 | } |
8d063cd8 |
190 | loop_stack[loop_ptr].loop_label = cmd->c_label; |
a687059c |
191 | loop_stack[loop_ptr].loop_sp = sp; |
8d063cd8 |
192 | #ifdef DEBUGGING |
193 | if (debug & 4) { |
194 | deb("(Pushing label #%d %s)\n", |
a687059c |
195 | loop_ptr, cmd->c_label ? cmd->c_label : ""); |
8d063cd8 |
196 | } |
197 | #endif |
198 | } |
d8f2e4cc |
199 | #ifdef JMPCLOBBER |
200 | cmdparm = cmd; |
201 | #endif |
202 | if (match = setjmp(loop_stack[loop_ptr].loop_env)) { |
a687059c |
203 | st = stack->ary_array; /* possibly reallocated */ |
afd9f252 |
204 | #ifdef JMPCLOBBER |
d8f2e4cc |
205 | cmd = cmdparm; |
206 | cmdflags = cmd->c_flags|CF_ONCE; |
207 | #endif |
afd9f252 |
208 | if (savestack->ary_fill > oldsave) |
209 | restorelist(oldsave); |
d8f2e4cc |
210 | switch (match) { |
afd9f252 |
211 | default: |
212 | fatal("longjmp returned bad value (%d)",match); |
d8f2e4cc |
213 | case O_LAST: /* not done unless go_to found */ |
214 | go_to = Nullch; |
215 | if (lastretstr) { |
216 | retstr = lastretstr; |
217 | newsp = -2; |
218 | } |
219 | else { |
220 | newsp = sp + lastsize; |
221 | retstr = st[newsp]; |
222 | } |
8d063cd8 |
223 | #ifdef DEBUGGING |
d8f2e4cc |
224 | olddlevel = dlevel; |
8d063cd8 |
225 | #endif |
d8f2e4cc |
226 | curspat = oldspat; |
d8f2e4cc |
227 | goto next_cmd; |
228 | case O_NEXT: /* not done unless go_to found */ |
229 | go_to = Nullch; |
230 | #ifdef JMPCLOBBER |
231 | newsp = -2; |
232 | retstr = &str_undef; |
233 | #endif |
234 | goto next_iter; |
235 | case O_REDO: /* not done unless go_to found */ |
236 | go_to = Nullch; |
237 | #ifdef JMPCLOBBER |
238 | newsp = -2; |
239 | retstr = &str_undef; |
240 | #endif |
241 | goto doit; |
242 | } |
8d063cd8 |
243 | } |
244 | oldspat = curspat; |
378cc40b |
245 | oldsave = savestack->ary_fill; |
8d063cd8 |
246 | #ifdef DEBUGGING |
247 | olddlevel = dlevel; |
248 | #endif |
249 | if (cmd->ucmd.ccmd.cc_true) { |
250 | #ifdef DEBUGGING |
378cc40b |
251 | if (debug) { |
252 | debname[dlevel] = 't'; |
a687059c |
253 | debdelim[dlevel] = '_'; |
254 | if (++dlevel >= dlmax) |
255 | grow_dlevel(); |
378cc40b |
256 | } |
8d063cd8 |
257 | #endif |
21d892ea |
258 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
259 | st = stack->ary_array; /* possibly reallocated */ |
260 | retstr = st[newsp]; |
8d063cd8 |
261 | } |
262 | if (!goto_targ) { |
263 | go_to = Nullch; |
264 | goto next_iter; |
265 | } |
266 | #ifdef DEBUGGING |
267 | dlevel = olddlevel; |
268 | #endif |
269 | if (cmd->ucmd.ccmd.cc_alt) { |
270 | #ifdef DEBUGGING |
378cc40b |
271 | if (debug) { |
272 | debname[dlevel] = 'a'; |
a687059c |
273 | debdelim[dlevel] = '_'; |
274 | if (++dlevel >= dlmax) |
275 | grow_dlevel(); |
378cc40b |
276 | } |
8d063cd8 |
277 | #endif |
21d892ea |
278 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_alt,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
279 | st = stack->ary_array; /* possibly reallocated */ |
280 | retstr = st[newsp]; |
8d063cd8 |
281 | } |
282 | if (goto_targ) |
283 | break; |
284 | go_to = Nullch; |
285 | goto finish_while; |
286 | } |
287 | cmd = cmd->c_next; |
378cc40b |
288 | if (cmd && cmd->c_head == cmd) |
289 | /* reached end of while loop */ |
a687059c |
290 | return sp; /* targ isn't in this block */ |
378cc40b |
291 | if (cmdflags & CF_ONCE) { |
292 | #ifdef DEBUGGING |
293 | if (debug & 4) { |
a687059c |
294 | tmps = loop_stack[loop_ptr].loop_label; |
378cc40b |
295 | deb("(Popping label #%d %s)\n",loop_ptr, |
a687059c |
296 | tmps ? tmps : "" ); |
378cc40b |
297 | } |
298 | #endif |
299 | loop_ptr--; |
300 | } |
8d063cd8 |
301 | goto tail_recursion_entry; |
302 | } |
303 | } |
304 | |
305 | until_loop: |
306 | |
378cc40b |
307 | /* Set line number so run-time errors can be located */ |
308 | |
87250799 |
309 | curcmd = cmd; |
378cc40b |
310 | |
8d063cd8 |
311 | #ifdef DEBUGGING |
378cc40b |
312 | if (debug) { |
313 | if (debug & 2) { |
314 | deb("%s (%lx) r%lx t%lx a%lx n%lx cs%lx\n", |
315 | cmdname[cmd->c_type],cmd,cmd->c_expr, |
316 | cmd->ucmd.ccmd.cc_true,cmd->ucmd.ccmd.cc_alt,cmd->c_next, |
317 | curspat); |
318 | } |
319 | debname[dlevel] = cmdname[cmd->c_type][0]; |
a687059c |
320 | debdelim[dlevel] = '!'; |
321 | if (++dlevel >= dlmax) |
322 | grow_dlevel(); |
8d063cd8 |
323 | } |
8d063cd8 |
324 | #endif |
8d063cd8 |
325 | |
326 | /* Here is some common optimization */ |
327 | |
328 | if (cmdflags & CF_COND) { |
329 | switch (cmdflags & CF_OPTIMIZE) { |
330 | |
331 | case CFT_FALSE: |
378cc40b |
332 | retstr = cmd->c_short; |
a687059c |
333 | newsp = -2; |
8d063cd8 |
334 | match = FALSE; |
335 | if (cmdflags & CF_NESURE) |
336 | goto maybe; |
337 | break; |
338 | case CFT_TRUE: |
378cc40b |
339 | retstr = cmd->c_short; |
a687059c |
340 | newsp = -2; |
8d063cd8 |
341 | match = TRUE; |
342 | if (cmdflags & CF_EQSURE) |
343 | goto flipmaybe; |
344 | break; |
345 | |
346 | case CFT_REG: |
347 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
348 | newsp = -2; |
8d063cd8 |
349 | match = str_true(retstr); /* => retstr = retstr, c2 should fix */ |
350 | if (cmdflags & (match ? CF_EQSURE : CF_NESURE)) |
351 | goto flipmaybe; |
352 | break; |
353 | |
354 | case CFT_ANCHOR: /* /^pat/ optimization */ |
355 | if (multiline) { |
378cc40b |
356 | if (*cmd->c_short->str_ptr && !(cmdflags & CF_EQSURE)) |
8d063cd8 |
357 | goto scanner; /* just unanchor it */ |
358 | else |
359 | break; /* must evaluate */ |
360 | } |
361 | /* FALL THROUGH */ |
362 | case CFT_STROP: /* string op optimization */ |
363 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
364 | newsp = -2; |
365 | #ifndef I286 |
378cc40b |
366 | if (*cmd->c_short->str_ptr == *str_get(retstr) && |
a687059c |
367 | bcmp(cmd->c_short->str_ptr, str_get(retstr), |
368 | cmd->c_slen) == 0 ) { |
8d063cd8 |
369 | if (cmdflags & CF_EQSURE) { |
a687059c |
370 | if (sawampersand && (cmdflags & CF_OPTIMIZE) != CFT_STROP) { |
371 | curspat = Nullspat; |
372 | if (leftstab) |
373 | str_nset(stab_val(leftstab),"",0); |
374 | if (amperstab) |
375 | str_sset(stab_val(amperstab),cmd->c_short); |
376 | if (rightstab) |
377 | str_nset(stab_val(rightstab), |
378 | retstr->str_ptr + cmd->c_slen, |
379 | retstr->str_cur - cmd->c_slen); |
380 | } |
8d063cd8 |
381 | match = !(cmdflags & CF_FIRSTNEG); |
382 | retstr = &str_yes; |
383 | goto flipmaybe; |
384 | } |
385 | } |
386 | else if (cmdflags & CF_NESURE) { |
387 | match = cmdflags & CF_FIRSTNEG; |
388 | retstr = &str_no; |
389 | goto flipmaybe; |
390 | } |
a687059c |
391 | #else |
392 | { |
393 | char *zap1, *zap2, zap1c, zap2c; |
394 | int zaplen; |
395 | |
396 | zap1 = cmd->c_short->str_ptr; |
397 | zap2 = str_get(retstr); |
398 | zap1c = *zap1; |
399 | zap2c = *zap2; |
400 | zaplen = cmd->c_slen; |
401 | if ((zap1c == zap2c) && (bcmp(zap1, zap2, zaplen) == 0)) { |
402 | if (cmdflags & CF_EQSURE) { |
403 | if (sawampersand && |
404 | (cmdflags & CF_OPTIMIZE) != CFT_STROP) { |
405 | curspat = Nullspat; |
406 | if (leftstab) |
407 | str_nset(stab_val(leftstab),"",0); |
408 | if (amperstab) |
409 | str_sset(stab_val(amperstab),cmd->c_short); |
410 | if (rightstab) |
411 | str_nset(stab_val(rightstab), |
412 | retstr->str_ptr + cmd->c_slen, |
413 | retstr->str_cur - cmd->c_slen); |
414 | } |
415 | match = !(cmdflags & CF_FIRSTNEG); |
416 | retstr = &str_yes; |
417 | goto flipmaybe; |
418 | } |
419 | } |
420 | else if (cmdflags & CF_NESURE) { |
421 | match = cmdflags & CF_FIRSTNEG; |
422 | retstr = &str_no; |
423 | goto flipmaybe; |
424 | } |
425 | } |
426 | #endif |
8d063cd8 |
427 | break; /* must evaluate */ |
428 | |
429 | case CFT_SCAN: /* non-anchored search */ |
430 | scanner: |
431 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
432 | newsp = -2; |
433 | if (retstr->str_pok & SP_STUDIED) |
378cc40b |
434 | if (screamfirst[cmd->c_short->str_rare] >= 0) |
435 | tmps = screaminstr(retstr, cmd->c_short); |
436 | else |
437 | tmps = Nullch; |
438 | else { |
439 | tmps = str_get(retstr); /* make sure it's pok */ |
a687059c |
440 | #ifndef lint |
441 | tmps = fbminstr((unsigned char*)tmps, |
442 | (unsigned char*)tmps + retstr->str_cur, cmd->c_short); |
443 | #endif |
378cc40b |
444 | } |
445 | if (tmps) { |
8d063cd8 |
446 | if (cmdflags & CF_EQSURE) { |
a687059c |
447 | ++cmd->c_short->str_u.str_useful; |
448 | if (sawampersand) { |
449 | curspat = Nullspat; |
450 | if (leftstab) |
451 | str_nset(stab_val(leftstab),retstr->str_ptr, |
452 | tmps - retstr->str_ptr); |
453 | if (amperstab) |
454 | str_sset(stab_val(amperstab),cmd->c_short); |
455 | if (rightstab) |
456 | str_nset(stab_val(rightstab), |
457 | tmps + cmd->c_short->str_cur, |
458 | retstr->str_cur - (tmps - retstr->str_ptr) - |
459 | cmd->c_short->str_cur); |
460 | } |
8d063cd8 |
461 | match = !(cmdflags & CF_FIRSTNEG); |
462 | retstr = &str_yes; |
463 | goto flipmaybe; |
464 | } |
378cc40b |
465 | else |
466 | hint = tmps; |
467 | } |
468 | else { |
469 | if (cmdflags & CF_NESURE) { |
a687059c |
470 | ++cmd->c_short->str_u.str_useful; |
378cc40b |
471 | match = cmdflags & CF_FIRSTNEG; |
472 | retstr = &str_no; |
473 | goto flipmaybe; |
474 | } |
475 | } |
a687059c |
476 | if (--cmd->c_short->str_u.str_useful < 0) { |
ff2452de |
477 | cmdflags &= ~CF_OPTIMIZE; |
378cc40b |
478 | cmdflags |= CFT_EVAL; /* never try this optimization again */ |
ff2452de |
479 | cmd->c_flags = (cmdflags & ~CF_ONCE); |
378cc40b |
480 | } |
481 | break; /* must evaluate */ |
482 | |
483 | case CFT_NUMOP: /* numeric op optimization */ |
484 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
485 | newsp = -2; |
378cc40b |
486 | switch (cmd->c_slen) { |
487 | case O_EQ: |
a687059c |
488 | if (dowarn) { |
489 | if ((!retstr->str_nok && !looks_like_number(retstr))) |
490 | warn("Possible use of == on string value"); |
491 | } |
492 | match = (str_gnum(retstr) == cmd->c_short->str_u.str_nval); |
378cc40b |
493 | break; |
494 | case O_NE: |
a687059c |
495 | match = (str_gnum(retstr) != cmd->c_short->str_u.str_nval); |
378cc40b |
496 | break; |
497 | case O_LT: |
a687059c |
498 | match = (str_gnum(retstr) < cmd->c_short->str_u.str_nval); |
378cc40b |
499 | break; |
500 | case O_LE: |
a687059c |
501 | match = (str_gnum(retstr) <= cmd->c_short->str_u.str_nval); |
378cc40b |
502 | break; |
503 | case O_GT: |
a687059c |
504 | match = (str_gnum(retstr) > cmd->c_short->str_u.str_nval); |
378cc40b |
505 | break; |
506 | case O_GE: |
a687059c |
507 | match = (str_gnum(retstr) >= cmd->c_short->str_u.str_nval); |
378cc40b |
508 | break; |
509 | } |
510 | if (match) { |
511 | if (cmdflags & CF_EQSURE) { |
512 | retstr = &str_yes; |
513 | goto flipmaybe; |
514 | } |
8d063cd8 |
515 | } |
516 | else if (cmdflags & CF_NESURE) { |
8d063cd8 |
517 | retstr = &str_no; |
518 | goto flipmaybe; |
519 | } |
520 | break; /* must evaluate */ |
521 | |
378cc40b |
522 | case CFT_INDGETS: /* while (<$foo>) */ |
523 | last_in_stab = stabent(str_get(STAB_STR(cmd->c_stab)),TRUE); |
a687059c |
524 | if (!stab_io(last_in_stab)) |
525 | stab_io(last_in_stab) = stio_new(); |
378cc40b |
526 | goto dogets; |
8d063cd8 |
527 | case CFT_GETS: /* really a while (<file>) */ |
528 | last_in_stab = cmd->c_stab; |
378cc40b |
529 | dogets: |
a687059c |
530 | fp = stab_io(last_in_stab)->ifp; |
531 | retstr = stab_val(defstab); |
532 | newsp = -2; |
bf38876a |
533 | keepgoing: |
a687059c |
534 | if (fp && str_gets(retstr, fp, 0)) { |
535 | if (*retstr->str_ptr == '0' && retstr->str_cur == 1) |
378cc40b |
536 | match = FALSE; |
537 | else |
538 | match = TRUE; |
a687059c |
539 | stab_io(last_in_stab)->lines++; |
8d063cd8 |
540 | } |
bf38876a |
541 | else if (stab_io(last_in_stab)->flags & IOF_ARGV) { |
542 | if (!fp) |
543 | goto doeval; /* first time through */ |
544 | fp = nextargv(last_in_stab); |
545 | if (fp) |
546 | goto keepgoing; |
547 | (void)do_close(last_in_stab,FALSE); |
548 | stab_io(last_in_stab)->flags |= IOF_START; |
549 | retstr = &str_undef; |
550 | match = FALSE; |
551 | } |
8d063cd8 |
552 | else { |
a687059c |
553 | retstr = &str_undef; |
8d063cd8 |
554 | match = FALSE; |
555 | } |
556 | goto flipmaybe; |
557 | case CFT_EVAL: |
558 | break; |
559 | case CFT_UNFLIP: |
a687059c |
560 | while (tmps_max > tmps_base) /* clean up after last eval */ |
561 | str_free(tmps_list[tmps_max--]); |
562 | newsp = eval(cmd->c_expr,gimme && (cmdflags & CF_TERM),sp); |
563 | st = stack->ary_array; /* possibly reallocated */ |
564 | retstr = st[newsp]; |
8d063cd8 |
565 | match = str_true(retstr); |
566 | if (cmd->c_expr->arg_type == O_FLIP) /* undid itself? */ |
567 | cmdflags = copyopt(cmd,cmd->c_expr[3].arg_ptr.arg_cmd); |
568 | goto maybe; |
569 | case CFT_CHOP: |
a687059c |
570 | retstr = stab_val(cmd->c_stab); |
571 | newsp = -2; |
8d063cd8 |
572 | match = (retstr->str_cur != 0); |
573 | tmps = str_get(retstr); |
574 | tmps += retstr->str_cur - match; |
a687059c |
575 | str_nset(&str_chop,tmps,match); |
8d063cd8 |
576 | *tmps = '\0'; |
577 | retstr->str_nok = 0; |
578 | retstr->str_cur = tmps - retstr->str_ptr; |
579 | retstr = &str_chop; |
580 | goto flipmaybe; |
378cc40b |
581 | case CFT_ARRAY: |
0d3e774c |
582 | match = cmd->c_short->str_u.str_useful; /* just to get register */ |
378cc40b |
583 | |
a687059c |
584 | if (match < 0) { /* first time through here? */ |
0d3e774c |
585 | ar = stab_array(cmd->c_expr[1].arg_ptr.arg_stab); |
a687059c |
586 | aryoptsave = savestack->ary_fill; |
587 | savesptr(&stab_val(cmd->c_stab)); |
0d3e774c |
588 | savelong(&cmd->c_short->str_u.str_useful); |
a687059c |
589 | } |
afd9f252 |
590 | else { |
0d3e774c |
591 | ar = stab_xarray(cmd->c_expr[1].arg_ptr.arg_stab); |
afd9f252 |
592 | if (cmd->c_type != C_WHILE && savestack->ary_fill > firstsave) |
593 | restorelist(firstsave); |
594 | } |
378cc40b |
595 | |
a687059c |
596 | if (match >= ar->ary_fill) { /* we're in LAST, probably */ |
597 | retstr = &str_undef; |
0d3e774c |
598 | cmd->c_short->str_u.str_useful = -1; /* actually redundant */ |
378cc40b |
599 | match = FALSE; |
600 | } |
601 | else { |
602 | match++; |
a687059c |
603 | retstr = stab_val(cmd->c_stab) = ar->ary_array[match]; |
0d3e774c |
604 | cmd->c_short->str_u.str_useful = match; |
378cc40b |
605 | match = TRUE; |
606 | } |
a687059c |
607 | newsp = -2; |
378cc40b |
608 | goto maybe; |
8d063cd8 |
609 | } |
610 | |
611 | /* we have tried to make this normal case as abnormal as possible */ |
612 | |
613 | doeval: |
a687059c |
614 | if (gimme == G_ARRAY) { |
615 | lastretstr = Nullstr; |
616 | lastspbase = sp; |
617 | lastsize = newsp - sp; |
618 | } |
619 | else |
620 | lastretstr = retstr; |
621 | while (tmps_max > tmps_base) /* clean up after last eval */ |
622 | str_free(tmps_list[tmps_max--]); |
87250799 |
623 | newsp = eval(cmd->c_expr, |
624 | gimme && (cmdflags & CF_TERM) && cmd->c_type == C_EXPR && |
625 | !cmd->ucmd.acmd.ac_expr, |
626 | sp); |
a687059c |
627 | st = stack->ary_array; /* possibly reallocated */ |
628 | retstr = st[newsp]; |
d8f2e4cc |
629 | if (newsp > sp && retstr) |
a687059c |
630 | match = str_true(retstr); |
631 | else |
632 | match = FALSE; |
8d063cd8 |
633 | goto maybe; |
634 | |
635 | /* if flipflop was true, flop it */ |
636 | |
637 | flipmaybe: |
638 | if (match && cmdflags & CF_FLIP) { |
a687059c |
639 | while (tmps_max > tmps_base) /* clean up after last eval */ |
640 | str_free(tmps_list[tmps_max--]); |
8d063cd8 |
641 | if (cmd->c_expr->arg_type == O_FLOP) { /* currently toggled? */ |
a687059c |
642 | newsp = eval(cmd->c_expr,G_SCALAR,sp);/*let eval undo it*/ |
8d063cd8 |
643 | cmdflags = copyopt(cmd,cmd->c_expr[3].arg_ptr.arg_cmd); |
644 | } |
645 | else { |
a687059c |
646 | newsp = eval(cmd->c_expr,G_SCALAR,sp);/* let eval do it */ |
8d063cd8 |
647 | if (cmd->c_expr->arg_type == O_FLOP) /* still toggled? */ |
648 | cmdflags = copyopt(cmd,cmd->c_expr[4].arg_ptr.arg_cmd); |
649 | } |
650 | } |
651 | else if (cmdflags & CF_FLIP) { |
652 | if (cmd->c_expr->arg_type == O_FLOP) { /* currently toggled? */ |
653 | match = TRUE; /* force on */ |
654 | } |
655 | } |
656 | |
657 | /* at this point, match says whether our expression was true */ |
658 | |
659 | maybe: |
660 | if (cmdflags & CF_INVERT) |
661 | match = !match; |
a687059c |
662 | if (!match) |
378cc40b |
663 | goto next_cmd; |
8d063cd8 |
664 | } |
a687059c |
665 | #ifdef TAINT |
666 | tainted = 0; /* modifier doesn't affect regular expression */ |
667 | #endif |
8d063cd8 |
668 | |
669 | /* now to do the actual command, if any */ |
670 | |
671 | switch (cmd->c_type) { |
672 | case C_NULL: |
378cc40b |
673 | fatal("panic: cmd_exec"); |
8d063cd8 |
674 | case C_EXPR: /* evaluated for side effects */ |
675 | if (cmd->ucmd.acmd.ac_expr) { /* more to do? */ |
a687059c |
676 | if (gimme == G_ARRAY) { |
677 | lastretstr = Nullstr; |
678 | lastspbase = sp; |
679 | lastsize = newsp - sp; |
680 | } |
681 | else |
682 | lastretstr = retstr; |
683 | while (tmps_max > tmps_base) /* clean up after last eval */ |
684 | str_free(tmps_list[tmps_max--]); |
685 | newsp = eval(cmd->ucmd.acmd.ac_expr,gimme && (cmdflags&CF_TERM),sp); |
686 | st = stack->ary_array; /* possibly reallocated */ |
687 | retstr = st[newsp]; |
8d063cd8 |
688 | } |
689 | break; |
a687059c |
690 | case C_NSWITCH: |
87250799 |
691 | { |
692 | double value = str_gnum(STAB_STR(cmd->c_stab)); |
693 | |
694 | match = (int)value; |
695 | if (value < 0.0) { |
696 | if (((double)match) > value) |
697 | --match; /* was fractional--truncate other way */ |
698 | } |
699 | } |
a687059c |
700 | goto doswitch; |
701 | case C_CSWITCH: |
702 | match = *(str_get(STAB_STR(cmd->c_stab))) & 255; |
703 | doswitch: |
704 | match -= cmd->ucmd.scmd.sc_offset; |
705 | if (match < 0) |
706 | match = 0; |
707 | else if (match > cmd->ucmd.scmd.sc_max) |
ff2452de |
708 | match = cmd->ucmd.scmd.sc_max; |
a687059c |
709 | cmd = cmd->ucmd.scmd.sc_next[match]; |
710 | goto tail_recursion_entry; |
711 | case C_NEXT: |
712 | cmd = cmd->ucmd.ccmd.cc_alt; |
713 | goto tail_recursion_entry; |
714 | case C_ELSIF: |
715 | fatal("panic: ELSIF"); |
8d063cd8 |
716 | case C_IF: |
717 | oldspat = curspat; |
378cc40b |
718 | oldsave = savestack->ary_fill; |
8d063cd8 |
719 | #ifdef DEBUGGING |
720 | olddlevel = dlevel; |
721 | #endif |
a687059c |
722 | retstr = &str_yes; |
723 | newsp = -2; |
724 | if (cmd->ucmd.ccmd.cc_true) { |
8d063cd8 |
725 | #ifdef DEBUGGING |
a687059c |
726 | if (debug) { |
727 | debname[dlevel] = 't'; |
728 | debdelim[dlevel] = '_'; |
729 | if (++dlevel >= dlmax) |
730 | grow_dlevel(); |
8d063cd8 |
731 | } |
a687059c |
732 | #endif |
21d892ea |
733 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
734 | st = stack->ary_array; /* possibly reallocated */ |
735 | retstr = st[newsp]; |
8d063cd8 |
736 | } |
a687059c |
737 | curspat = oldspat; |
738 | if (savestack->ary_fill > oldsave) |
739 | restorelist(oldsave); |
8d063cd8 |
740 | #ifdef DEBUGGING |
a687059c |
741 | dlevel = olddlevel; |
8d063cd8 |
742 | #endif |
a687059c |
743 | cmd = cmd->ucmd.ccmd.cc_alt; |
744 | goto tail_recursion_entry; |
745 | case C_ELSE: |
746 | oldspat = curspat; |
747 | oldsave = savestack->ary_fill; |
748 | #ifdef DEBUGGING |
749 | olddlevel = dlevel; |
750 | #endif |
751 | retstr = &str_undef; |
752 | newsp = -2; |
753 | if (cmd->ucmd.ccmd.cc_true) { |
754 | #ifdef DEBUGGING |
755 | if (debug) { |
756 | debname[dlevel] = 'e'; |
757 | debdelim[dlevel] = '_'; |
758 | if (++dlevel >= dlmax) |
759 | grow_dlevel(); |
8d063cd8 |
760 | } |
a687059c |
761 | #endif |
21d892ea |
762 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
763 | st = stack->ary_array; /* possibly reallocated */ |
764 | retstr = st[newsp]; |
8d063cd8 |
765 | } |
766 | curspat = oldspat; |
378cc40b |
767 | if (savestack->ary_fill > oldsave) |
768 | restorelist(oldsave); |
8d063cd8 |
769 | #ifdef DEBUGGING |
770 | dlevel = olddlevel; |
771 | #endif |
772 | break; |
773 | case C_BLOCK: |
774 | case C_WHILE: |
775 | if (!(cmdflags & CF_ONCE)) { /* first time through here? */ |
776 | cmdflags |= CF_ONCE; |
a687059c |
777 | if (++loop_ptr >= loop_max) { |
778 | loop_max += 128; |
779 | Renew(loop_stack, loop_max, struct loop); |
780 | } |
8d063cd8 |
781 | loop_stack[loop_ptr].loop_label = cmd->c_label; |
a687059c |
782 | loop_stack[loop_ptr].loop_sp = sp; |
8d063cd8 |
783 | #ifdef DEBUGGING |
784 | if (debug & 4) { |
785 | deb("(Pushing label #%d %s)\n", |
a687059c |
786 | loop_ptr, cmd->c_label ? cmd->c_label : ""); |
8d063cd8 |
787 | } |
788 | #endif |
789 | } |
d8f2e4cc |
790 | #ifdef JMPCLOBBER |
791 | cmdparm = cmd; |
792 | #endif |
793 | if (match = setjmp(loop_stack[loop_ptr].loop_env)) { |
a687059c |
794 | st = stack->ary_array; /* possibly reallocated */ |
afd9f252 |
795 | #ifdef JMPCLOBBER |
d8f2e4cc |
796 | cmd = cmdparm; |
797 | cmdflags = cmd->c_flags|CF_ONCE; |
798 | go_to = goto_targ; |
799 | #endif |
afd9f252 |
800 | if (savestack->ary_fill > oldsave) |
801 | restorelist(oldsave); |
d8f2e4cc |
802 | switch (match) { |
afd9f252 |
803 | default: |
804 | fatal("longjmp returned bad value (%d)",match); |
d8f2e4cc |
805 | case O_LAST: |
806 | if (lastretstr) { |
807 | retstr = lastretstr; |
808 | newsp = -2; |
809 | } |
810 | else { |
811 | newsp = sp + lastsize; |
812 | retstr = st[newsp]; |
813 | } |
814 | curspat = oldspat; |
d8f2e4cc |
815 | goto next_cmd; |
816 | case O_NEXT: |
817 | #ifdef JMPCLOBBER |
a687059c |
818 | newsp = -2; |
d8f2e4cc |
819 | retstr = &str_undef; |
820 | #endif |
821 | goto next_iter; |
822 | case O_REDO: |
36ce8bec |
823 | #ifdef DEBUGGING |
d8f2e4cc |
824 | dlevel = olddlevel; |
36ce8bec |
825 | #endif |
d8f2e4cc |
826 | #ifdef JMPCLOBBER |
827 | newsp = -2; |
828 | retstr = &str_undef; |
829 | #endif |
830 | goto doit; |
831 | } |
8d063cd8 |
832 | } |
833 | oldspat = curspat; |
378cc40b |
834 | oldsave = savestack->ary_fill; |
8d063cd8 |
835 | #ifdef DEBUGGING |
836 | olddlevel = dlevel; |
837 | #endif |
838 | doit: |
839 | if (cmd->ucmd.ccmd.cc_true) { |
840 | #ifdef DEBUGGING |
378cc40b |
841 | if (debug) { |
842 | debname[dlevel] = 't'; |
a687059c |
843 | debdelim[dlevel] = '_'; |
844 | if (++dlevel >= dlmax) |
845 | grow_dlevel(); |
378cc40b |
846 | } |
8d063cd8 |
847 | #endif |
21d892ea |
848 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
849 | st = stack->ary_array; /* possibly reallocated */ |
850 | retstr = st[newsp]; |
8d063cd8 |
851 | } |
378cc40b |
852 | /* actually, this spot is rarely reached anymore since the above |
8d063cd8 |
853 | * cmd_exec() returns through longjmp(). Hooray for structure. |
854 | */ |
855 | next_iter: |
856 | #ifdef DEBUGGING |
857 | dlevel = olddlevel; |
858 | #endif |
859 | if (cmd->ucmd.ccmd.cc_alt) { |
860 | #ifdef DEBUGGING |
378cc40b |
861 | if (debug) { |
862 | debname[dlevel] = 'a'; |
a687059c |
863 | debdelim[dlevel] = '_'; |
864 | if (++dlevel >= dlmax) |
865 | grow_dlevel(); |
378cc40b |
866 | } |
8d063cd8 |
867 | #endif |
21d892ea |
868 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_alt,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
869 | st = stack->ary_array; /* possibly reallocated */ |
870 | retstr = st[newsp]; |
8d063cd8 |
871 | } |
872 | finish_while: |
873 | curspat = oldspat; |
afd9f252 |
874 | if (savestack->ary_fill > oldsave) { |
875 | if (cmdflags & CF_TERM) { |
876 | for (match = sp + 1; match <= newsp; match++) |
877 | st[match] = str_static(st[match]); |
878 | retstr = st[newsp]; |
879 | } |
378cc40b |
880 | restorelist(oldsave); |
afd9f252 |
881 | } |
8d063cd8 |
882 | #ifdef DEBUGGING |
883 | dlevel = olddlevel - 1; |
884 | #endif |
885 | if (cmd->c_type != C_BLOCK) |
886 | goto until_loop; /* go back and evaluate conditional again */ |
887 | } |
888 | if (cmdflags & CF_LOOP) { |
889 | cmdflags |= CF_COND; /* now test the condition */ |
378cc40b |
890 | #ifdef DEBUGGING |
891 | dlevel = entdlevel; |
892 | #endif |
8d063cd8 |
893 | goto until_loop; |
894 | } |
378cc40b |
895 | next_cmd: |
896 | if (cmdflags & CF_ONCE) { |
897 | #ifdef DEBUGGING |
898 | if (debug & 4) { |
a687059c |
899 | tmps = loop_stack[loop_ptr].loop_label; |
900 | deb("(Popping label #%d %s)\n",loop_ptr, tmps ? tmps : ""); |
378cc40b |
901 | } |
902 | #endif |
903 | loop_ptr--; |
afd9f252 |
904 | if ((cmdflags & CF_OPTIMIZE) == CFT_ARRAY && |
905 | savestack->ary_fill > aryoptsave) |
a687059c |
906 | restorelist(aryoptsave); |
378cc40b |
907 | } |
8d063cd8 |
908 | cmd = cmd->c_next; |
909 | goto tail_recursion_entry; |
910 | } |
911 | |
912 | #ifdef DEBUGGING |
a687059c |
913 | # ifndef VARARGS |
8d063cd8 |
914 | /*VARARGS1*/ |
915 | deb(pat,a1,a2,a3,a4,a5,a6,a7,a8) |
916 | char *pat; |
917 | { |
918 | register int i; |
919 | |
87250799 |
920 | fprintf(stderr,"%-4ld",(long)curcmd->c_line); |
8d063cd8 |
921 | for (i=0; i<dlevel; i++) |
922 | fprintf(stderr,"%c%c ",debname[i],debdelim[i]); |
923 | fprintf(stderr,pat,a1,a2,a3,a4,a5,a6,a7,a8); |
924 | } |
a687059c |
925 | # else |
926 | /*VARARGS1*/ |
927 | deb(va_alist) |
928 | va_dcl |
929 | { |
930 | va_list args; |
931 | char *pat; |
932 | register int i; |
933 | |
934 | va_start(args); |
87250799 |
935 | fprintf(stderr,"%-4ld",(long)curcmd->c_line); |
a687059c |
936 | for (i=0; i<dlevel; i++) |
937 | fprintf(stderr,"%c%c ",debname[i],debdelim[i]); |
938 | |
939 | pat = va_arg(args, char *); |
940 | (void) vfprintf(stderr,pat,args); |
941 | va_end( args ); |
942 | } |
943 | # endif |
8d063cd8 |
944 | #endif |
945 | |
946 | copyopt(cmd,which) |
947 | register CMD *cmd; |
948 | register CMD *which; |
949 | { |
950 | cmd->c_flags &= CF_ONCE|CF_COND|CF_LOOP; |
951 | cmd->c_flags |= which->c_flags; |
378cc40b |
952 | cmd->c_short = which->c_short; |
953 | cmd->c_slen = which->c_slen; |
8d063cd8 |
954 | cmd->c_stab = which->c_stab; |
955 | return cmd->c_flags; |
956 | } |
378cc40b |
957 | |
a687059c |
958 | ARRAY * |
959 | saveary(stab) |
960 | STAB *stab; |
961 | { |
962 | register STR *str; |
963 | |
964 | str = Str_new(10,0); |
965 | str->str_state = SS_SARY; |
966 | str->str_u.str_stab = stab; |
967 | if (str->str_ptr) { |
968 | Safefree(str->str_ptr); |
969 | str->str_len = 0; |
970 | } |
971 | str->str_ptr = (char*)stab_array(stab); |
972 | (void)apush(savestack,str); /* save array ptr */ |
973 | stab_xarray(stab) = Null(ARRAY*); |
974 | return stab_xarray(aadd(stab)); |
975 | } |
976 | |
977 | HASH * |
978 | savehash(stab) |
979 | STAB *stab; |
980 | { |
981 | register STR *str; |
982 | |
983 | str = Str_new(11,0); |
984 | str->str_state = SS_SHASH; |
985 | str->str_u.str_stab = stab; |
986 | if (str->str_ptr) { |
987 | Safefree(str->str_ptr); |
988 | str->str_len = 0; |
989 | } |
990 | str->str_ptr = (char*)stab_hash(stab); |
991 | (void)apush(savestack,str); /* save hash ptr */ |
992 | stab_xhash(stab) = Null(HASH*); |
993 | return stab_xhash(hadd(stab)); |
994 | } |
995 | |
996 | void |
997 | saveitem(item) |
998 | register STR *item; |
999 | { |
1000 | register STR *str; |
1001 | |
1002 | (void)apush(savestack,item); /* remember the pointer */ |
1003 | str = Str_new(12,0); |
1004 | str_sset(str,item); |
1005 | (void)apush(savestack,str); /* remember the value */ |
1006 | } |
1007 | |
1008 | void |
1009 | saveint(intp) |
1010 | int *intp; |
1011 | { |
1012 | register STR *str; |
1013 | |
1014 | str = Str_new(13,0); |
1015 | str->str_state = SS_SINT; |
1016 | str->str_u.str_useful = (long)*intp; /* remember value */ |
1017 | if (str->str_ptr) { |
1018 | Safefree(str->str_ptr); |
1019 | str->str_len = 0; |
1020 | } |
1021 | str->str_ptr = (char*)intp; /* remember pointer */ |
1022 | (void)apush(savestack,str); |
1023 | } |
1024 | |
1025 | void |
1026 | savelong(longp) |
1027 | long *longp; |
1028 | { |
1029 | register STR *str; |
1030 | |
1031 | str = Str_new(14,0); |
1032 | str->str_state = SS_SLONG; |
1033 | str->str_u.str_useful = *longp; /* remember value */ |
1034 | if (str->str_ptr) { |
1035 | Safefree(str->str_ptr); |
1036 | str->str_len = 0; |
1037 | } |
1038 | str->str_ptr = (char*)longp; /* remember pointer */ |
1039 | (void)apush(savestack,str); |
1040 | } |
1041 | |
1042 | void |
1043 | savesptr(sptr) |
1044 | STR **sptr; |
1045 | { |
1046 | register STR *str; |
1047 | |
1048 | str = Str_new(15,0); |
1049 | str->str_state = SS_SSTRP; |
1050 | str->str_magic = *sptr; /* remember value */ |
1051 | if (str->str_ptr) { |
1052 | Safefree(str->str_ptr); |
1053 | str->str_len = 0; |
1054 | } |
1055 | str->str_ptr = (char*)sptr; /* remember pointer */ |
1056 | (void)apush(savestack,str); |
1057 | } |
1058 | |
1059 | void |
1060 | savenostab(stab) |
1061 | STAB *stab; |
1062 | { |
1063 | register STR *str; |
1064 | |
1065 | str = Str_new(16,0); |
1066 | str->str_state = SS_SNSTAB; |
1067 | str->str_magic = (STR*)stab; /* remember which stab to free */ |
1068 | (void)apush(savestack,str); |
1069 | } |
1070 | |
1071 | void |
1072 | savehptr(hptr) |
1073 | HASH **hptr; |
1074 | { |
1075 | register STR *str; |
1076 | |
1077 | str = Str_new(17,0); |
1078 | str->str_state = SS_SHPTR; |
1079 | str->str_u.str_hash = *hptr; /* remember value */ |
1080 | if (str->str_ptr) { |
1081 | Safefree(str->str_ptr); |
1082 | str->str_len = 0; |
1083 | } |
1084 | str->str_ptr = (char*)hptr; /* remember pointer */ |
1085 | (void)apush(savestack,str); |
1086 | } |
1087 | |
378cc40b |
1088 | void |
1089 | savelist(sarg,maxsarg) |
1090 | register STR **sarg; |
1091 | int maxsarg; |
1092 | { |
1093 | register STR *str; |
1094 | register int i; |
1095 | |
1096 | for (i = 1; i <= maxsarg; i++) { |
a687059c |
1097 | (void)apush(savestack,sarg[i]); /* remember the pointer */ |
1098 | str = Str_new(18,0); |
378cc40b |
1099 | str_sset(str,sarg[i]); |
a687059c |
1100 | (void)apush(savestack,str); /* remember the value */ |
d8f2e4cc |
1101 | sarg[i]->str_u.str_useful = -1; |
378cc40b |
1102 | } |
1103 | } |
1104 | |
1105 | void |
1106 | restorelist(base) |
1107 | int base; |
1108 | { |
1109 | register STR *str; |
1110 | register STR *value; |
a687059c |
1111 | register STAB *stab; |
378cc40b |
1112 | |
a687059c |
1113 | if (base < -1) |
1114 | fatal("panic: corrupt saved stack index"); |
378cc40b |
1115 | while (savestack->ary_fill > base) { |
1116 | value = apop(savestack); |
a687059c |
1117 | switch (value->str_state) { |
1118 | case SS_NORM: /* normal string */ |
1119 | case SS_INCR: |
1120 | str = apop(savestack); |
1121 | str_replace(str,value); |
1122 | STABSET(str); |
1123 | break; |
1124 | case SS_SARY: /* array reference */ |
1125 | stab = value->str_u.str_stab; |
1126 | afree(stab_xarray(stab)); |
1127 | stab_xarray(stab) = (ARRAY*)value->str_ptr; |
1128 | value->str_ptr = Nullch; |
1129 | str_free(value); |
1130 | break; |
1131 | case SS_SHASH: /* hash reference */ |
1132 | stab = value->str_u.str_stab; |
1133 | (void)hfree(stab_xhash(stab)); |
1134 | stab_xhash(stab) = (HASH*)value->str_ptr; |
1135 | value->str_ptr = Nullch; |
1136 | str_free(value); |
1137 | break; |
1138 | case SS_SINT: /* int reference */ |
1139 | *((int*)value->str_ptr) = (int)value->str_u.str_useful; |
1140 | value->str_ptr = Nullch; |
1141 | str_free(value); |
1142 | break; |
1143 | case SS_SLONG: /* long reference */ |
1144 | *((long*)value->str_ptr) = value->str_u.str_useful; |
1145 | value->str_ptr = Nullch; |
1146 | str_free(value); |
1147 | break; |
1148 | case SS_SSTRP: /* STR* reference */ |
1149 | *((STR**)value->str_ptr) = value->str_magic; |
1150 | value->str_magic = Nullstr; |
1151 | value->str_ptr = Nullch; |
1152 | str_free(value); |
1153 | break; |
1154 | case SS_SHPTR: /* HASH* reference */ |
1155 | *((HASH**)value->str_ptr) = value->str_u.str_hash; |
1156 | value->str_ptr = Nullch; |
1157 | str_free(value); |
1158 | break; |
1159 | case SS_SNSTAB: |
1160 | stab = (STAB*)value->str_magic; |
1161 | value->str_magic = Nullstr; |
1162 | (void)stab_clear(stab); |
1163 | str_free(value); |
1164 | break; |
1165 | default: |
1166 | fatal("panic: restorelist inconsistency"); |
1167 | } |
378cc40b |
1168 | } |
1169 | } |
a687059c |
1170 | |
bf38876a |
1171 | #ifdef DEBUGGING |
a687059c |
1172 | void |
1173 | grow_dlevel() |
1174 | { |
1175 | dlmax += 128; |
1176 | Renew(debname, dlmax, char); |
1177 | Renew(debdelim, dlmax, char); |
1178 | } |
bf38876a |
1179 | #endif |