Commit | Line | Data |
39c3038c |
1 | /* $Header: cmd.c,v 3.0.1.9 90/10/15 15:32:39 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 $ |
39c3038c |
9 | * Revision 3.0.1.9 90/10/15 15:32:39 lwall |
10 | * patch29: non-existent array values no longer cause core dumps |
11 | * patch29: scripts now run at almost full speed under the debugger |
12 | * patch29: @ENV = () now works |
13 | * patch29: added caller |
14 | * |
87250799 |
15 | * Revision 3.0.1.8 90/08/09 02:28:49 lwall |
16 | * patch19: did preliminary work toward debugging packages and evals |
17 | * patch19: conditionals now always supply a scalar context to expression |
18 | * patch19: switch optimizer was confused by negative fractional values |
19 | * |
21d892ea |
20 | * Revision 3.0.1.7 90/03/27 15:32:37 lwall |
21 | * patch16: non-terminal blocks should never have arrays requested of them |
22 | * |
ff2452de |
23 | * Revision 3.0.1.6 90/03/12 16:21:09 lwall |
24 | * patch13: fixed some backwards VOLATILE declarations |
25 | * patch13: while (s/x//) {} still caused some anomolies |
26 | * patch13: greater-than test of numeric switch structures did less-than action |
27 | * |
afd9f252 |
28 | * Revision 3.0.1.5 90/02/28 16:38:31 lwall |
29 | * patch9: volatilized some more variables for super-optimizing compilers |
30 | * patch9: nested foreach loops didn't reset inner loop on next to outer loop |
31 | * patch9: returned values were read from obsolete stack |
32 | * patch9: added sanity check on longjmp() return value |
33 | * patch9: substitutions that almost always succeed can corrupt label stack |
34 | * patch9: subs which return by both mechanisms can clobber local return data |
35 | * |
d8f2e4cc |
36 | * Revision 3.0.1.4 89/12/21 19:17:41 lwall |
37 | * patch7: arranged for certain registers to be restored after longjmp() |
38 | * patch7: made nested or recursive foreach work right |
39 | * |
0d3e774c |
40 | * Revision 3.0.1.3 89/11/17 15:04:36 lwall |
41 | * patch5: nested foreach on same array didn't work |
42 | * |
bf38876a |
43 | * Revision 3.0.1.2 89/11/11 04:08:56 lwall |
44 | * patch2: non-BSD machines required two ^D's for <> |
45 | * patch2: grow_dlevel() not inside #ifdef DEBUGGING |
46 | * |
03a14243 |
47 | * Revision 3.0.1.1 89/10/26 23:04:21 lwall |
48 | * patch1: heuristically disabled optimization could cause core dump |
49 | * |
a687059c |
50 | * Revision 3.0 89/10/18 15:09:02 lwall |
51 | * 3.0 baseline |
8d063cd8 |
52 | * |
53 | */ |
54 | |
8d063cd8 |
55 | #include "EXTERN.h" |
8d063cd8 |
56 | #include "perl.h" |
57 | |
a687059c |
58 | #ifdef I_VARARGS |
59 | # include <varargs.h> |
60 | #endif |
61 | |
8d063cd8 |
62 | static STR str_chop; |
63 | |
a687059c |
64 | void grow_dlevel(); |
65 | |
d8f2e4cc |
66 | /* do longjmps() clobber register variables? */ |
67 | |
68 | #if defined(cray) || defined(__STDC__) |
69 | #define JMPCLOBBER |
70 | #endif |
71 | |
8d063cd8 |
72 | /* This is the main command loop. We try to spend as much time in this loop |
73 | * as possible, so lots of optimizations do their activities in here. This |
74 | * means things get a little sloppy. |
75 | */ |
76 | |
a687059c |
77 | int |
d8f2e4cc |
78 | cmd_exec(cmdparm,gimme,sp) |
79 | CMD *VOLATILE cmdparm; |
afd9f252 |
80 | VOLATILE int gimme; |
81 | VOLATILE int sp; |
8d063cd8 |
82 | { |
d8f2e4cc |
83 | register CMD *cmd = cmdparm; |
84 | SPAT *VOLATILE oldspat; |
afd9f252 |
85 | VOLATILE int firstsave = savestack->ary_fill; |
d8f2e4cc |
86 | VOLATILE int oldsave; |
87 | VOLATILE int aryoptsave; |
8d063cd8 |
88 | #ifdef DEBUGGING |
d8f2e4cc |
89 | VOLATILE int olddlevel; |
90 | VOLATILE int entdlevel; |
8d063cd8 |
91 | #endif |
a687059c |
92 | register STR *retstr = &str_undef; |
8d063cd8 |
93 | register char *tmps; |
94 | register int cmdflags; |
378cc40b |
95 | register int match; |
8d063cd8 |
96 | register char *go_to = goto_targ; |
a687059c |
97 | register int newsp = -2; |
98 | register STR **st = stack->ary_array; |
ff2452de |
99 | FILE *VOLATILE fp; |
100 | ARRAY *VOLATILE ar; |
8d063cd8 |
101 | |
a687059c |
102 | lastsize = 0; |
8d063cd8 |
103 | #ifdef DEBUGGING |
104 | entdlevel = dlevel; |
105 | #endif |
106 | tail_recursion_entry: |
107 | #ifdef DEBUGGING |
108 | dlevel = entdlevel; |
109 | #endif |
a687059c |
110 | #ifdef TAINT |
111 | tainted = 0; /* Each statement is presumed innocent */ |
112 | #endif |
113 | if (cmd == Nullcmd) { |
114 | if (gimme == G_ARRAY && newsp > -2) |
115 | return newsp; |
116 | else { |
117 | st[++sp] = retstr; |
118 | return sp; |
119 | } |
120 | } |
8d063cd8 |
121 | cmdflags = cmd->c_flags; /* hopefully load register */ |
122 | if (go_to) { |
123 | if (cmd->c_label && strEQ(go_to,cmd->c_label)) |
124 | goto_targ = go_to = Nullch; /* here at last */ |
125 | else { |
126 | switch (cmd->c_type) { |
127 | case C_IF: |
128 | oldspat = curspat; |
378cc40b |
129 | oldsave = savestack->ary_fill; |
8d063cd8 |
130 | #ifdef DEBUGGING |
131 | olddlevel = dlevel; |
132 | #endif |
133 | retstr = &str_yes; |
a687059c |
134 | newsp = -2; |
8d063cd8 |
135 | if (cmd->ucmd.ccmd.cc_true) { |
136 | #ifdef DEBUGGING |
378cc40b |
137 | if (debug) { |
138 | debname[dlevel] = 't'; |
a687059c |
139 | debdelim[dlevel] = '_'; |
140 | if (++dlevel >= dlmax) |
141 | grow_dlevel(); |
378cc40b |
142 | } |
8d063cd8 |
143 | #endif |
21d892ea |
144 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
145 | st = stack->ary_array; /* possibly reallocated */ |
146 | retstr = st[newsp]; |
8d063cd8 |
147 | } |
a687059c |
148 | if (!goto_targ) |
8d063cd8 |
149 | go_to = Nullch; |
a687059c |
150 | curspat = oldspat; |
151 | if (savestack->ary_fill > oldsave) |
152 | restorelist(oldsave); |
8d063cd8 |
153 | #ifdef DEBUGGING |
a687059c |
154 | dlevel = olddlevel; |
8d063cd8 |
155 | #endif |
a687059c |
156 | cmd = cmd->ucmd.ccmd.cc_alt; |
157 | goto tail_recursion_entry; |
158 | case C_ELSE: |
159 | oldspat = curspat; |
160 | oldsave = savestack->ary_fill; |
161 | #ifdef DEBUGGING |
162 | olddlevel = dlevel; |
163 | #endif |
164 | retstr = &str_undef; |
165 | newsp = -2; |
166 | if (cmd->ucmd.ccmd.cc_true) { |
167 | #ifdef DEBUGGING |
168 | if (debug) { |
169 | debname[dlevel] = 'e'; |
170 | debdelim[dlevel] = '_'; |
171 | if (++dlevel >= dlmax) |
172 | grow_dlevel(); |
8d063cd8 |
173 | } |
a687059c |
174 | #endif |
21d892ea |
175 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
176 | st = stack->ary_array; /* possibly reallocated */ |
177 | retstr = st[newsp]; |
8d063cd8 |
178 | } |
179 | if (!goto_targ) |
180 | go_to = Nullch; |
181 | curspat = oldspat; |
378cc40b |
182 | if (savestack->ary_fill > oldsave) |
183 | restorelist(oldsave); |
8d063cd8 |
184 | #ifdef DEBUGGING |
185 | dlevel = olddlevel; |
186 | #endif |
187 | break; |
188 | case C_BLOCK: |
189 | case C_WHILE: |
190 | if (!(cmdflags & CF_ONCE)) { |
191 | cmdflags |= CF_ONCE; |
a687059c |
192 | if (++loop_ptr >= loop_max) { |
193 | loop_max += 128; |
194 | Renew(loop_stack, loop_max, struct loop); |
195 | } |
8d063cd8 |
196 | loop_stack[loop_ptr].loop_label = cmd->c_label; |
a687059c |
197 | loop_stack[loop_ptr].loop_sp = sp; |
8d063cd8 |
198 | #ifdef DEBUGGING |
199 | if (debug & 4) { |
200 | deb("(Pushing label #%d %s)\n", |
a687059c |
201 | loop_ptr, cmd->c_label ? cmd->c_label : ""); |
8d063cd8 |
202 | } |
203 | #endif |
204 | } |
d8f2e4cc |
205 | #ifdef JMPCLOBBER |
206 | cmdparm = cmd; |
207 | #endif |
208 | if (match = setjmp(loop_stack[loop_ptr].loop_env)) { |
a687059c |
209 | st = stack->ary_array; /* possibly reallocated */ |
afd9f252 |
210 | #ifdef JMPCLOBBER |
d8f2e4cc |
211 | cmd = cmdparm; |
212 | cmdflags = cmd->c_flags|CF_ONCE; |
213 | #endif |
afd9f252 |
214 | if (savestack->ary_fill > oldsave) |
215 | restorelist(oldsave); |
d8f2e4cc |
216 | switch (match) { |
afd9f252 |
217 | default: |
218 | fatal("longjmp returned bad value (%d)",match); |
d8f2e4cc |
219 | case O_LAST: /* not done unless go_to found */ |
220 | go_to = Nullch; |
221 | if (lastretstr) { |
222 | retstr = lastretstr; |
223 | newsp = -2; |
224 | } |
225 | else { |
226 | newsp = sp + lastsize; |
227 | retstr = st[newsp]; |
228 | } |
8d063cd8 |
229 | #ifdef DEBUGGING |
d8f2e4cc |
230 | olddlevel = dlevel; |
8d063cd8 |
231 | #endif |
d8f2e4cc |
232 | curspat = oldspat; |
d8f2e4cc |
233 | goto next_cmd; |
234 | case O_NEXT: /* not done unless go_to found */ |
235 | go_to = Nullch; |
236 | #ifdef JMPCLOBBER |
237 | newsp = -2; |
238 | retstr = &str_undef; |
239 | #endif |
240 | goto next_iter; |
241 | case O_REDO: /* not done unless go_to found */ |
242 | go_to = Nullch; |
243 | #ifdef JMPCLOBBER |
244 | newsp = -2; |
245 | retstr = &str_undef; |
246 | #endif |
247 | goto doit; |
248 | } |
8d063cd8 |
249 | } |
250 | oldspat = curspat; |
378cc40b |
251 | oldsave = savestack->ary_fill; |
8d063cd8 |
252 | #ifdef DEBUGGING |
253 | olddlevel = dlevel; |
254 | #endif |
255 | if (cmd->ucmd.ccmd.cc_true) { |
256 | #ifdef DEBUGGING |
378cc40b |
257 | if (debug) { |
258 | debname[dlevel] = 't'; |
a687059c |
259 | debdelim[dlevel] = '_'; |
260 | if (++dlevel >= dlmax) |
261 | grow_dlevel(); |
378cc40b |
262 | } |
8d063cd8 |
263 | #endif |
21d892ea |
264 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
265 | st = stack->ary_array; /* possibly reallocated */ |
266 | retstr = st[newsp]; |
8d063cd8 |
267 | } |
268 | if (!goto_targ) { |
269 | go_to = Nullch; |
270 | goto next_iter; |
271 | } |
272 | #ifdef DEBUGGING |
273 | dlevel = olddlevel; |
274 | #endif |
275 | if (cmd->ucmd.ccmd.cc_alt) { |
276 | #ifdef DEBUGGING |
378cc40b |
277 | if (debug) { |
278 | debname[dlevel] = 'a'; |
a687059c |
279 | debdelim[dlevel] = '_'; |
280 | if (++dlevel >= dlmax) |
281 | grow_dlevel(); |
378cc40b |
282 | } |
8d063cd8 |
283 | #endif |
21d892ea |
284 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_alt,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
285 | st = stack->ary_array; /* possibly reallocated */ |
286 | retstr = st[newsp]; |
8d063cd8 |
287 | } |
288 | if (goto_targ) |
289 | break; |
290 | go_to = Nullch; |
291 | goto finish_while; |
292 | } |
293 | cmd = cmd->c_next; |
378cc40b |
294 | if (cmd && cmd->c_head == cmd) |
295 | /* reached end of while loop */ |
a687059c |
296 | return sp; /* targ isn't in this block */ |
378cc40b |
297 | if (cmdflags & CF_ONCE) { |
298 | #ifdef DEBUGGING |
299 | if (debug & 4) { |
a687059c |
300 | tmps = loop_stack[loop_ptr].loop_label; |
378cc40b |
301 | deb("(Popping label #%d %s)\n",loop_ptr, |
a687059c |
302 | tmps ? tmps : "" ); |
378cc40b |
303 | } |
304 | #endif |
305 | loop_ptr--; |
306 | } |
8d063cd8 |
307 | goto tail_recursion_entry; |
308 | } |
309 | } |
310 | |
311 | until_loop: |
312 | |
378cc40b |
313 | /* Set line number so run-time errors can be located */ |
314 | |
87250799 |
315 | curcmd = cmd; |
378cc40b |
316 | |
8d063cd8 |
317 | #ifdef DEBUGGING |
378cc40b |
318 | if (debug) { |
319 | if (debug & 2) { |
320 | deb("%s (%lx) r%lx t%lx a%lx n%lx cs%lx\n", |
321 | cmdname[cmd->c_type],cmd,cmd->c_expr, |
322 | cmd->ucmd.ccmd.cc_true,cmd->ucmd.ccmd.cc_alt,cmd->c_next, |
323 | curspat); |
324 | } |
325 | debname[dlevel] = cmdname[cmd->c_type][0]; |
a687059c |
326 | debdelim[dlevel] = '!'; |
327 | if (++dlevel >= dlmax) |
328 | grow_dlevel(); |
8d063cd8 |
329 | } |
8d063cd8 |
330 | #endif |
8d063cd8 |
331 | |
332 | /* Here is some common optimization */ |
333 | |
334 | if (cmdflags & CF_COND) { |
335 | switch (cmdflags & CF_OPTIMIZE) { |
336 | |
337 | case CFT_FALSE: |
378cc40b |
338 | retstr = cmd->c_short; |
a687059c |
339 | newsp = -2; |
8d063cd8 |
340 | match = FALSE; |
341 | if (cmdflags & CF_NESURE) |
342 | goto maybe; |
343 | break; |
344 | case CFT_TRUE: |
378cc40b |
345 | retstr = cmd->c_short; |
a687059c |
346 | newsp = -2; |
8d063cd8 |
347 | match = TRUE; |
348 | if (cmdflags & CF_EQSURE) |
349 | goto flipmaybe; |
350 | break; |
351 | |
352 | case CFT_REG: |
353 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
354 | newsp = -2; |
8d063cd8 |
355 | match = str_true(retstr); /* => retstr = retstr, c2 should fix */ |
356 | if (cmdflags & (match ? CF_EQSURE : CF_NESURE)) |
357 | goto flipmaybe; |
358 | break; |
359 | |
360 | case CFT_ANCHOR: /* /^pat/ optimization */ |
361 | if (multiline) { |
378cc40b |
362 | if (*cmd->c_short->str_ptr && !(cmdflags & CF_EQSURE)) |
8d063cd8 |
363 | goto scanner; /* just unanchor it */ |
364 | else |
365 | break; /* must evaluate */ |
366 | } |
367 | /* FALL THROUGH */ |
368 | case CFT_STROP: /* string op optimization */ |
369 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
370 | newsp = -2; |
371 | #ifndef I286 |
378cc40b |
372 | if (*cmd->c_short->str_ptr == *str_get(retstr) && |
a687059c |
373 | bcmp(cmd->c_short->str_ptr, str_get(retstr), |
374 | cmd->c_slen) == 0 ) { |
8d063cd8 |
375 | if (cmdflags & CF_EQSURE) { |
a687059c |
376 | if (sawampersand && (cmdflags & CF_OPTIMIZE) != CFT_STROP) { |
377 | curspat = Nullspat; |
378 | if (leftstab) |
379 | str_nset(stab_val(leftstab),"",0); |
380 | if (amperstab) |
381 | str_sset(stab_val(amperstab),cmd->c_short); |
382 | if (rightstab) |
383 | str_nset(stab_val(rightstab), |
384 | retstr->str_ptr + cmd->c_slen, |
385 | retstr->str_cur - cmd->c_slen); |
386 | } |
8d063cd8 |
387 | match = !(cmdflags & CF_FIRSTNEG); |
388 | retstr = &str_yes; |
389 | goto flipmaybe; |
390 | } |
391 | } |
392 | else if (cmdflags & CF_NESURE) { |
393 | match = cmdflags & CF_FIRSTNEG; |
394 | retstr = &str_no; |
395 | goto flipmaybe; |
396 | } |
a687059c |
397 | #else |
398 | { |
399 | char *zap1, *zap2, zap1c, zap2c; |
400 | int zaplen; |
401 | |
402 | zap1 = cmd->c_short->str_ptr; |
403 | zap2 = str_get(retstr); |
404 | zap1c = *zap1; |
405 | zap2c = *zap2; |
406 | zaplen = cmd->c_slen; |
407 | if ((zap1c == zap2c) && (bcmp(zap1, zap2, zaplen) == 0)) { |
408 | if (cmdflags & CF_EQSURE) { |
409 | if (sawampersand && |
410 | (cmdflags & CF_OPTIMIZE) != CFT_STROP) { |
411 | curspat = Nullspat; |
412 | if (leftstab) |
413 | str_nset(stab_val(leftstab),"",0); |
414 | if (amperstab) |
415 | str_sset(stab_val(amperstab),cmd->c_short); |
416 | if (rightstab) |
417 | str_nset(stab_val(rightstab), |
418 | retstr->str_ptr + cmd->c_slen, |
419 | retstr->str_cur - cmd->c_slen); |
420 | } |
421 | match = !(cmdflags & CF_FIRSTNEG); |
422 | retstr = &str_yes; |
423 | goto flipmaybe; |
424 | } |
425 | } |
426 | else if (cmdflags & CF_NESURE) { |
427 | match = cmdflags & CF_FIRSTNEG; |
428 | retstr = &str_no; |
429 | goto flipmaybe; |
430 | } |
431 | } |
432 | #endif |
8d063cd8 |
433 | break; /* must evaluate */ |
434 | |
435 | case CFT_SCAN: /* non-anchored search */ |
436 | scanner: |
437 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
438 | newsp = -2; |
439 | if (retstr->str_pok & SP_STUDIED) |
378cc40b |
440 | if (screamfirst[cmd->c_short->str_rare] >= 0) |
441 | tmps = screaminstr(retstr, cmd->c_short); |
442 | else |
443 | tmps = Nullch; |
444 | else { |
445 | tmps = str_get(retstr); /* make sure it's pok */ |
a687059c |
446 | #ifndef lint |
447 | tmps = fbminstr((unsigned char*)tmps, |
448 | (unsigned char*)tmps + retstr->str_cur, cmd->c_short); |
449 | #endif |
378cc40b |
450 | } |
451 | if (tmps) { |
8d063cd8 |
452 | if (cmdflags & CF_EQSURE) { |
a687059c |
453 | ++cmd->c_short->str_u.str_useful; |
454 | if (sawampersand) { |
455 | curspat = Nullspat; |
456 | if (leftstab) |
457 | str_nset(stab_val(leftstab),retstr->str_ptr, |
458 | tmps - retstr->str_ptr); |
459 | if (amperstab) |
460 | str_sset(stab_val(amperstab),cmd->c_short); |
461 | if (rightstab) |
462 | str_nset(stab_val(rightstab), |
463 | tmps + cmd->c_short->str_cur, |
464 | retstr->str_cur - (tmps - retstr->str_ptr) - |
465 | cmd->c_short->str_cur); |
466 | } |
8d063cd8 |
467 | match = !(cmdflags & CF_FIRSTNEG); |
468 | retstr = &str_yes; |
469 | goto flipmaybe; |
470 | } |
378cc40b |
471 | else |
472 | hint = tmps; |
473 | } |
474 | else { |
475 | if (cmdflags & CF_NESURE) { |
a687059c |
476 | ++cmd->c_short->str_u.str_useful; |
378cc40b |
477 | match = cmdflags & CF_FIRSTNEG; |
478 | retstr = &str_no; |
479 | goto flipmaybe; |
480 | } |
481 | } |
a687059c |
482 | if (--cmd->c_short->str_u.str_useful < 0) { |
ff2452de |
483 | cmdflags &= ~CF_OPTIMIZE; |
378cc40b |
484 | cmdflags |= CFT_EVAL; /* never try this optimization again */ |
ff2452de |
485 | cmd->c_flags = (cmdflags & ~CF_ONCE); |
378cc40b |
486 | } |
487 | break; /* must evaluate */ |
488 | |
489 | case CFT_NUMOP: /* numeric op optimization */ |
490 | retstr = STAB_STR(cmd->c_stab); |
a687059c |
491 | newsp = -2; |
378cc40b |
492 | switch (cmd->c_slen) { |
493 | case O_EQ: |
a687059c |
494 | if (dowarn) { |
495 | if ((!retstr->str_nok && !looks_like_number(retstr))) |
496 | warn("Possible use of == on string value"); |
497 | } |
498 | match = (str_gnum(retstr) == cmd->c_short->str_u.str_nval); |
378cc40b |
499 | break; |
500 | case O_NE: |
a687059c |
501 | match = (str_gnum(retstr) != cmd->c_short->str_u.str_nval); |
378cc40b |
502 | break; |
503 | case O_LT: |
a687059c |
504 | match = (str_gnum(retstr) < cmd->c_short->str_u.str_nval); |
378cc40b |
505 | break; |
506 | case O_LE: |
a687059c |
507 | match = (str_gnum(retstr) <= cmd->c_short->str_u.str_nval); |
378cc40b |
508 | break; |
509 | case O_GT: |
a687059c |
510 | match = (str_gnum(retstr) > cmd->c_short->str_u.str_nval); |
378cc40b |
511 | break; |
512 | case O_GE: |
a687059c |
513 | match = (str_gnum(retstr) >= cmd->c_short->str_u.str_nval); |
378cc40b |
514 | break; |
515 | } |
516 | if (match) { |
517 | if (cmdflags & CF_EQSURE) { |
518 | retstr = &str_yes; |
519 | goto flipmaybe; |
520 | } |
8d063cd8 |
521 | } |
522 | else if (cmdflags & CF_NESURE) { |
8d063cd8 |
523 | retstr = &str_no; |
524 | goto flipmaybe; |
525 | } |
526 | break; /* must evaluate */ |
527 | |
378cc40b |
528 | case CFT_INDGETS: /* while (<$foo>) */ |
529 | last_in_stab = stabent(str_get(STAB_STR(cmd->c_stab)),TRUE); |
a687059c |
530 | if (!stab_io(last_in_stab)) |
531 | stab_io(last_in_stab) = stio_new(); |
378cc40b |
532 | goto dogets; |
8d063cd8 |
533 | case CFT_GETS: /* really a while (<file>) */ |
534 | last_in_stab = cmd->c_stab; |
378cc40b |
535 | dogets: |
a687059c |
536 | fp = stab_io(last_in_stab)->ifp; |
537 | retstr = stab_val(defstab); |
538 | newsp = -2; |
bf38876a |
539 | keepgoing: |
a687059c |
540 | if (fp && str_gets(retstr, fp, 0)) { |
541 | if (*retstr->str_ptr == '0' && retstr->str_cur == 1) |
378cc40b |
542 | match = FALSE; |
543 | else |
544 | match = TRUE; |
a687059c |
545 | stab_io(last_in_stab)->lines++; |
8d063cd8 |
546 | } |
bf38876a |
547 | else if (stab_io(last_in_stab)->flags & IOF_ARGV) { |
548 | if (!fp) |
549 | goto doeval; /* first time through */ |
550 | fp = nextargv(last_in_stab); |
551 | if (fp) |
552 | goto keepgoing; |
553 | (void)do_close(last_in_stab,FALSE); |
554 | stab_io(last_in_stab)->flags |= IOF_START; |
555 | retstr = &str_undef; |
556 | match = FALSE; |
557 | } |
8d063cd8 |
558 | else { |
a687059c |
559 | retstr = &str_undef; |
8d063cd8 |
560 | match = FALSE; |
561 | } |
562 | goto flipmaybe; |
563 | case CFT_EVAL: |
564 | break; |
565 | case CFT_UNFLIP: |
a687059c |
566 | while (tmps_max > tmps_base) /* clean up after last eval */ |
567 | str_free(tmps_list[tmps_max--]); |
568 | newsp = eval(cmd->c_expr,gimme && (cmdflags & CF_TERM),sp); |
569 | st = stack->ary_array; /* possibly reallocated */ |
570 | retstr = st[newsp]; |
8d063cd8 |
571 | match = str_true(retstr); |
572 | if (cmd->c_expr->arg_type == O_FLIP) /* undid itself? */ |
573 | cmdflags = copyopt(cmd,cmd->c_expr[3].arg_ptr.arg_cmd); |
574 | goto maybe; |
575 | case CFT_CHOP: |
a687059c |
576 | retstr = stab_val(cmd->c_stab); |
577 | newsp = -2; |
8d063cd8 |
578 | match = (retstr->str_cur != 0); |
579 | tmps = str_get(retstr); |
580 | tmps += retstr->str_cur - match; |
a687059c |
581 | str_nset(&str_chop,tmps,match); |
8d063cd8 |
582 | *tmps = '\0'; |
583 | retstr->str_nok = 0; |
584 | retstr->str_cur = tmps - retstr->str_ptr; |
585 | retstr = &str_chop; |
586 | goto flipmaybe; |
378cc40b |
587 | case CFT_ARRAY: |
0d3e774c |
588 | match = cmd->c_short->str_u.str_useful; /* just to get register */ |
378cc40b |
589 | |
a687059c |
590 | if (match < 0) { /* first time through here? */ |
0d3e774c |
591 | ar = stab_array(cmd->c_expr[1].arg_ptr.arg_stab); |
a687059c |
592 | aryoptsave = savestack->ary_fill; |
593 | savesptr(&stab_val(cmd->c_stab)); |
0d3e774c |
594 | savelong(&cmd->c_short->str_u.str_useful); |
a687059c |
595 | } |
afd9f252 |
596 | else { |
0d3e774c |
597 | ar = stab_xarray(cmd->c_expr[1].arg_ptr.arg_stab); |
afd9f252 |
598 | if (cmd->c_type != C_WHILE && savestack->ary_fill > firstsave) |
599 | restorelist(firstsave); |
600 | } |
378cc40b |
601 | |
a687059c |
602 | if (match >= ar->ary_fill) { /* we're in LAST, probably */ |
603 | retstr = &str_undef; |
0d3e774c |
604 | cmd->c_short->str_u.str_useful = -1; /* actually redundant */ |
378cc40b |
605 | match = FALSE; |
606 | } |
607 | else { |
608 | match++; |
39c3038c |
609 | if (!(retstr = ar->ary_array[match])) |
610 | retstr = afetch(ar,match,TRUE); |
611 | stab_val(cmd->c_stab) = retstr; |
0d3e774c |
612 | cmd->c_short->str_u.str_useful = match; |
378cc40b |
613 | match = TRUE; |
614 | } |
a687059c |
615 | newsp = -2; |
378cc40b |
616 | goto maybe; |
39c3038c |
617 | case CFT_D1: |
618 | break; |
619 | case CFT_D0: |
620 | if (DBsingle->str_u.str_nval != 0) |
621 | break; |
622 | if (DBsignal->str_u.str_nval != 0) |
623 | break; |
624 | if (DBtrace->str_u.str_nval != 0) |
625 | break; |
626 | goto next_cmd; |
8d063cd8 |
627 | } |
628 | |
629 | /* we have tried to make this normal case as abnormal as possible */ |
630 | |
631 | doeval: |
a687059c |
632 | if (gimme == G_ARRAY) { |
633 | lastretstr = Nullstr; |
634 | lastspbase = sp; |
635 | lastsize = newsp - sp; |
636 | } |
637 | else |
638 | lastretstr = retstr; |
639 | while (tmps_max > tmps_base) /* clean up after last eval */ |
640 | str_free(tmps_list[tmps_max--]); |
87250799 |
641 | newsp = eval(cmd->c_expr, |
642 | gimme && (cmdflags & CF_TERM) && cmd->c_type == C_EXPR && |
643 | !cmd->ucmd.acmd.ac_expr, |
644 | sp); |
a687059c |
645 | st = stack->ary_array; /* possibly reallocated */ |
646 | retstr = st[newsp]; |
d8f2e4cc |
647 | if (newsp > sp && retstr) |
a687059c |
648 | match = str_true(retstr); |
649 | else |
650 | match = FALSE; |
8d063cd8 |
651 | goto maybe; |
652 | |
653 | /* if flipflop was true, flop it */ |
654 | |
655 | flipmaybe: |
656 | if (match && cmdflags & CF_FLIP) { |
a687059c |
657 | while (tmps_max > tmps_base) /* clean up after last eval */ |
658 | str_free(tmps_list[tmps_max--]); |
8d063cd8 |
659 | if (cmd->c_expr->arg_type == O_FLOP) { /* currently toggled? */ |
a687059c |
660 | newsp = eval(cmd->c_expr,G_SCALAR,sp);/*let eval undo it*/ |
8d063cd8 |
661 | cmdflags = copyopt(cmd,cmd->c_expr[3].arg_ptr.arg_cmd); |
662 | } |
663 | else { |
a687059c |
664 | newsp = eval(cmd->c_expr,G_SCALAR,sp);/* let eval do it */ |
8d063cd8 |
665 | if (cmd->c_expr->arg_type == O_FLOP) /* still toggled? */ |
666 | cmdflags = copyopt(cmd,cmd->c_expr[4].arg_ptr.arg_cmd); |
667 | } |
668 | } |
669 | else if (cmdflags & CF_FLIP) { |
670 | if (cmd->c_expr->arg_type == O_FLOP) { /* currently toggled? */ |
671 | match = TRUE; /* force on */ |
672 | } |
673 | } |
674 | |
675 | /* at this point, match says whether our expression was true */ |
676 | |
677 | maybe: |
678 | if (cmdflags & CF_INVERT) |
679 | match = !match; |
a687059c |
680 | if (!match) |
378cc40b |
681 | goto next_cmd; |
8d063cd8 |
682 | } |
a687059c |
683 | #ifdef TAINT |
684 | tainted = 0; /* modifier doesn't affect regular expression */ |
685 | #endif |
8d063cd8 |
686 | |
687 | /* now to do the actual command, if any */ |
688 | |
689 | switch (cmd->c_type) { |
690 | case C_NULL: |
378cc40b |
691 | fatal("panic: cmd_exec"); |
8d063cd8 |
692 | case C_EXPR: /* evaluated for side effects */ |
693 | if (cmd->ucmd.acmd.ac_expr) { /* more to do? */ |
a687059c |
694 | if (gimme == G_ARRAY) { |
695 | lastretstr = Nullstr; |
696 | lastspbase = sp; |
697 | lastsize = newsp - sp; |
698 | } |
699 | else |
700 | lastretstr = retstr; |
701 | while (tmps_max > tmps_base) /* clean up after last eval */ |
702 | str_free(tmps_list[tmps_max--]); |
703 | newsp = eval(cmd->ucmd.acmd.ac_expr,gimme && (cmdflags&CF_TERM),sp); |
704 | st = stack->ary_array; /* possibly reallocated */ |
705 | retstr = st[newsp]; |
8d063cd8 |
706 | } |
707 | break; |
a687059c |
708 | case C_NSWITCH: |
87250799 |
709 | { |
710 | double value = str_gnum(STAB_STR(cmd->c_stab)); |
711 | |
712 | match = (int)value; |
713 | if (value < 0.0) { |
714 | if (((double)match) > value) |
715 | --match; /* was fractional--truncate other way */ |
716 | } |
717 | } |
a687059c |
718 | goto doswitch; |
719 | case C_CSWITCH: |
720 | match = *(str_get(STAB_STR(cmd->c_stab))) & 255; |
721 | doswitch: |
722 | match -= cmd->ucmd.scmd.sc_offset; |
723 | if (match < 0) |
724 | match = 0; |
725 | else if (match > cmd->ucmd.scmd.sc_max) |
ff2452de |
726 | match = cmd->ucmd.scmd.sc_max; |
a687059c |
727 | cmd = cmd->ucmd.scmd.sc_next[match]; |
728 | goto tail_recursion_entry; |
729 | case C_NEXT: |
730 | cmd = cmd->ucmd.ccmd.cc_alt; |
731 | goto tail_recursion_entry; |
732 | case C_ELSIF: |
733 | fatal("panic: ELSIF"); |
8d063cd8 |
734 | case C_IF: |
735 | oldspat = curspat; |
378cc40b |
736 | oldsave = savestack->ary_fill; |
8d063cd8 |
737 | #ifdef DEBUGGING |
738 | olddlevel = dlevel; |
739 | #endif |
a687059c |
740 | retstr = &str_yes; |
741 | newsp = -2; |
742 | if (cmd->ucmd.ccmd.cc_true) { |
8d063cd8 |
743 | #ifdef DEBUGGING |
a687059c |
744 | if (debug) { |
745 | debname[dlevel] = 't'; |
746 | debdelim[dlevel] = '_'; |
747 | if (++dlevel >= dlmax) |
748 | grow_dlevel(); |
8d063cd8 |
749 | } |
a687059c |
750 | #endif |
21d892ea |
751 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
752 | st = stack->ary_array; /* possibly reallocated */ |
753 | retstr = st[newsp]; |
8d063cd8 |
754 | } |
a687059c |
755 | curspat = oldspat; |
756 | if (savestack->ary_fill > oldsave) |
757 | restorelist(oldsave); |
8d063cd8 |
758 | #ifdef DEBUGGING |
a687059c |
759 | dlevel = olddlevel; |
8d063cd8 |
760 | #endif |
a687059c |
761 | cmd = cmd->ucmd.ccmd.cc_alt; |
762 | goto tail_recursion_entry; |
763 | case C_ELSE: |
764 | oldspat = curspat; |
765 | oldsave = savestack->ary_fill; |
766 | #ifdef DEBUGGING |
767 | olddlevel = dlevel; |
768 | #endif |
769 | retstr = &str_undef; |
770 | newsp = -2; |
771 | if (cmd->ucmd.ccmd.cc_true) { |
772 | #ifdef DEBUGGING |
773 | if (debug) { |
774 | debname[dlevel] = 'e'; |
775 | debdelim[dlevel] = '_'; |
776 | if (++dlevel >= dlmax) |
777 | grow_dlevel(); |
8d063cd8 |
778 | } |
a687059c |
779 | #endif |
21d892ea |
780 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
781 | st = stack->ary_array; /* possibly reallocated */ |
782 | retstr = st[newsp]; |
8d063cd8 |
783 | } |
784 | curspat = oldspat; |
378cc40b |
785 | if (savestack->ary_fill > oldsave) |
786 | restorelist(oldsave); |
8d063cd8 |
787 | #ifdef DEBUGGING |
788 | dlevel = olddlevel; |
789 | #endif |
790 | break; |
791 | case C_BLOCK: |
792 | case C_WHILE: |
793 | if (!(cmdflags & CF_ONCE)) { /* first time through here? */ |
794 | cmdflags |= CF_ONCE; |
a687059c |
795 | if (++loop_ptr >= loop_max) { |
796 | loop_max += 128; |
797 | Renew(loop_stack, loop_max, struct loop); |
798 | } |
8d063cd8 |
799 | loop_stack[loop_ptr].loop_label = cmd->c_label; |
a687059c |
800 | loop_stack[loop_ptr].loop_sp = sp; |
8d063cd8 |
801 | #ifdef DEBUGGING |
802 | if (debug & 4) { |
803 | deb("(Pushing label #%d %s)\n", |
a687059c |
804 | loop_ptr, cmd->c_label ? cmd->c_label : ""); |
8d063cd8 |
805 | } |
806 | #endif |
807 | } |
d8f2e4cc |
808 | #ifdef JMPCLOBBER |
809 | cmdparm = cmd; |
810 | #endif |
811 | if (match = setjmp(loop_stack[loop_ptr].loop_env)) { |
a687059c |
812 | st = stack->ary_array; /* possibly reallocated */ |
afd9f252 |
813 | #ifdef JMPCLOBBER |
d8f2e4cc |
814 | cmd = cmdparm; |
815 | cmdflags = cmd->c_flags|CF_ONCE; |
816 | go_to = goto_targ; |
817 | #endif |
afd9f252 |
818 | if (savestack->ary_fill > oldsave) |
819 | restorelist(oldsave); |
d8f2e4cc |
820 | switch (match) { |
afd9f252 |
821 | default: |
822 | fatal("longjmp returned bad value (%d)",match); |
d8f2e4cc |
823 | case O_LAST: |
824 | if (lastretstr) { |
825 | retstr = lastretstr; |
826 | newsp = -2; |
827 | } |
828 | else { |
829 | newsp = sp + lastsize; |
830 | retstr = st[newsp]; |
831 | } |
832 | curspat = oldspat; |
d8f2e4cc |
833 | goto next_cmd; |
834 | case O_NEXT: |
835 | #ifdef JMPCLOBBER |
a687059c |
836 | newsp = -2; |
d8f2e4cc |
837 | retstr = &str_undef; |
838 | #endif |
839 | goto next_iter; |
840 | case O_REDO: |
36ce8bec |
841 | #ifdef DEBUGGING |
d8f2e4cc |
842 | dlevel = olddlevel; |
36ce8bec |
843 | #endif |
d8f2e4cc |
844 | #ifdef JMPCLOBBER |
845 | newsp = -2; |
846 | retstr = &str_undef; |
847 | #endif |
848 | goto doit; |
849 | } |
8d063cd8 |
850 | } |
851 | oldspat = curspat; |
378cc40b |
852 | oldsave = savestack->ary_fill; |
8d063cd8 |
853 | #ifdef DEBUGGING |
854 | olddlevel = dlevel; |
855 | #endif |
856 | doit: |
857 | if (cmd->ucmd.ccmd.cc_true) { |
858 | #ifdef DEBUGGING |
378cc40b |
859 | if (debug) { |
860 | debname[dlevel] = 't'; |
a687059c |
861 | debdelim[dlevel] = '_'; |
862 | if (++dlevel >= dlmax) |
863 | grow_dlevel(); |
378cc40b |
864 | } |
8d063cd8 |
865 | #endif |
21d892ea |
866 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_true,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
867 | st = stack->ary_array; /* possibly reallocated */ |
868 | retstr = st[newsp]; |
8d063cd8 |
869 | } |
378cc40b |
870 | /* actually, this spot is rarely reached anymore since the above |
8d063cd8 |
871 | * cmd_exec() returns through longjmp(). Hooray for structure. |
872 | */ |
873 | next_iter: |
874 | #ifdef DEBUGGING |
875 | dlevel = olddlevel; |
876 | #endif |
877 | if (cmd->ucmd.ccmd.cc_alt) { |
878 | #ifdef DEBUGGING |
378cc40b |
879 | if (debug) { |
880 | debname[dlevel] = 'a'; |
a687059c |
881 | debdelim[dlevel] = '_'; |
882 | if (++dlevel >= dlmax) |
883 | grow_dlevel(); |
378cc40b |
884 | } |
8d063cd8 |
885 | #endif |
21d892ea |
886 | newsp = cmd_exec(cmd->ucmd.ccmd.cc_alt,gimme && (cmdflags & CF_TERM),sp); |
a687059c |
887 | st = stack->ary_array; /* possibly reallocated */ |
888 | retstr = st[newsp]; |
8d063cd8 |
889 | } |
890 | finish_while: |
891 | curspat = oldspat; |
afd9f252 |
892 | if (savestack->ary_fill > oldsave) { |
893 | if (cmdflags & CF_TERM) { |
894 | for (match = sp + 1; match <= newsp; match++) |
895 | st[match] = str_static(st[match]); |
896 | retstr = st[newsp]; |
897 | } |
378cc40b |
898 | restorelist(oldsave); |
afd9f252 |
899 | } |
8d063cd8 |
900 | #ifdef DEBUGGING |
901 | dlevel = olddlevel - 1; |
902 | #endif |
903 | if (cmd->c_type != C_BLOCK) |
904 | goto until_loop; /* go back and evaluate conditional again */ |
905 | } |
906 | if (cmdflags & CF_LOOP) { |
907 | cmdflags |= CF_COND; /* now test the condition */ |
378cc40b |
908 | #ifdef DEBUGGING |
909 | dlevel = entdlevel; |
910 | #endif |
8d063cd8 |
911 | goto until_loop; |
912 | } |
378cc40b |
913 | next_cmd: |
914 | if (cmdflags & CF_ONCE) { |
915 | #ifdef DEBUGGING |
916 | if (debug & 4) { |
a687059c |
917 | tmps = loop_stack[loop_ptr].loop_label; |
918 | deb("(Popping label #%d %s)\n",loop_ptr, tmps ? tmps : ""); |
378cc40b |
919 | } |
920 | #endif |
921 | loop_ptr--; |
afd9f252 |
922 | if ((cmdflags & CF_OPTIMIZE) == CFT_ARRAY && |
923 | savestack->ary_fill > aryoptsave) |
a687059c |
924 | restorelist(aryoptsave); |
378cc40b |
925 | } |
8d063cd8 |
926 | cmd = cmd->c_next; |
927 | goto tail_recursion_entry; |
928 | } |
929 | |
930 | #ifdef DEBUGGING |
a687059c |
931 | # ifndef VARARGS |
8d063cd8 |
932 | /*VARARGS1*/ |
933 | deb(pat,a1,a2,a3,a4,a5,a6,a7,a8) |
934 | char *pat; |
935 | { |
936 | register int i; |
937 | |
87250799 |
938 | fprintf(stderr,"%-4ld",(long)curcmd->c_line); |
8d063cd8 |
939 | for (i=0; i<dlevel; i++) |
940 | fprintf(stderr,"%c%c ",debname[i],debdelim[i]); |
941 | fprintf(stderr,pat,a1,a2,a3,a4,a5,a6,a7,a8); |
942 | } |
a687059c |
943 | # else |
944 | /*VARARGS1*/ |
945 | deb(va_alist) |
946 | va_dcl |
947 | { |
948 | va_list args; |
949 | char *pat; |
950 | register int i; |
951 | |
952 | va_start(args); |
87250799 |
953 | fprintf(stderr,"%-4ld",(long)curcmd->c_line); |
a687059c |
954 | for (i=0; i<dlevel; i++) |
955 | fprintf(stderr,"%c%c ",debname[i],debdelim[i]); |
956 | |
957 | pat = va_arg(args, char *); |
958 | (void) vfprintf(stderr,pat,args); |
959 | va_end( args ); |
960 | } |
961 | # endif |
8d063cd8 |
962 | #endif |
963 | |
964 | copyopt(cmd,which) |
965 | register CMD *cmd; |
966 | register CMD *which; |
967 | { |
968 | cmd->c_flags &= CF_ONCE|CF_COND|CF_LOOP; |
969 | cmd->c_flags |= which->c_flags; |
378cc40b |
970 | cmd->c_short = which->c_short; |
971 | cmd->c_slen = which->c_slen; |
8d063cd8 |
972 | cmd->c_stab = which->c_stab; |
973 | return cmd->c_flags; |
974 | } |
378cc40b |
975 | |
a687059c |
976 | ARRAY * |
977 | saveary(stab) |
978 | STAB *stab; |
979 | { |
980 | register STR *str; |
981 | |
982 | str = Str_new(10,0); |
983 | str->str_state = SS_SARY; |
984 | str->str_u.str_stab = stab; |
985 | if (str->str_ptr) { |
986 | Safefree(str->str_ptr); |
987 | str->str_len = 0; |
988 | } |
989 | str->str_ptr = (char*)stab_array(stab); |
990 | (void)apush(savestack,str); /* save array ptr */ |
991 | stab_xarray(stab) = Null(ARRAY*); |
992 | return stab_xarray(aadd(stab)); |
993 | } |
994 | |
995 | HASH * |
996 | savehash(stab) |
997 | STAB *stab; |
998 | { |
999 | register STR *str; |
1000 | |
1001 | str = Str_new(11,0); |
1002 | str->str_state = SS_SHASH; |
1003 | str->str_u.str_stab = stab; |
1004 | if (str->str_ptr) { |
1005 | Safefree(str->str_ptr); |
1006 | str->str_len = 0; |
1007 | } |
1008 | str->str_ptr = (char*)stab_hash(stab); |
1009 | (void)apush(savestack,str); /* save hash ptr */ |
1010 | stab_xhash(stab) = Null(HASH*); |
1011 | return stab_xhash(hadd(stab)); |
1012 | } |
1013 | |
1014 | void |
1015 | saveitem(item) |
1016 | register STR *item; |
1017 | { |
1018 | register STR *str; |
1019 | |
1020 | (void)apush(savestack,item); /* remember the pointer */ |
1021 | str = Str_new(12,0); |
1022 | str_sset(str,item); |
1023 | (void)apush(savestack,str); /* remember the value */ |
1024 | } |
1025 | |
1026 | void |
1027 | saveint(intp) |
1028 | int *intp; |
1029 | { |
1030 | register STR *str; |
1031 | |
1032 | str = Str_new(13,0); |
1033 | str->str_state = SS_SINT; |
1034 | str->str_u.str_useful = (long)*intp; /* remember value */ |
1035 | if (str->str_ptr) { |
1036 | Safefree(str->str_ptr); |
1037 | str->str_len = 0; |
1038 | } |
1039 | str->str_ptr = (char*)intp; /* remember pointer */ |
1040 | (void)apush(savestack,str); |
1041 | } |
1042 | |
1043 | void |
1044 | savelong(longp) |
1045 | long *longp; |
1046 | { |
1047 | register STR *str; |
1048 | |
1049 | str = Str_new(14,0); |
1050 | str->str_state = SS_SLONG; |
1051 | str->str_u.str_useful = *longp; /* remember value */ |
1052 | if (str->str_ptr) { |
1053 | Safefree(str->str_ptr); |
1054 | str->str_len = 0; |
1055 | } |
1056 | str->str_ptr = (char*)longp; /* remember pointer */ |
1057 | (void)apush(savestack,str); |
1058 | } |
1059 | |
1060 | void |
1061 | savesptr(sptr) |
1062 | STR **sptr; |
1063 | { |
1064 | register STR *str; |
1065 | |
1066 | str = Str_new(15,0); |
1067 | str->str_state = SS_SSTRP; |
1068 | str->str_magic = *sptr; /* remember value */ |
1069 | if (str->str_ptr) { |
1070 | Safefree(str->str_ptr); |
1071 | str->str_len = 0; |
1072 | } |
1073 | str->str_ptr = (char*)sptr; /* remember pointer */ |
1074 | (void)apush(savestack,str); |
1075 | } |
1076 | |
1077 | void |
1078 | savenostab(stab) |
1079 | STAB *stab; |
1080 | { |
1081 | register STR *str; |
1082 | |
1083 | str = Str_new(16,0); |
1084 | str->str_state = SS_SNSTAB; |
1085 | str->str_magic = (STR*)stab; /* remember which stab to free */ |
1086 | (void)apush(savestack,str); |
1087 | } |
1088 | |
1089 | void |
1090 | savehptr(hptr) |
1091 | HASH **hptr; |
1092 | { |
1093 | register STR *str; |
1094 | |
1095 | str = Str_new(17,0); |
1096 | str->str_state = SS_SHPTR; |
1097 | str->str_u.str_hash = *hptr; /* remember value */ |
1098 | if (str->str_ptr) { |
1099 | Safefree(str->str_ptr); |
1100 | str->str_len = 0; |
1101 | } |
1102 | str->str_ptr = (char*)hptr; /* remember pointer */ |
1103 | (void)apush(savestack,str); |
1104 | } |
1105 | |
378cc40b |
1106 | void |
1107 | savelist(sarg,maxsarg) |
1108 | register STR **sarg; |
1109 | int maxsarg; |
1110 | { |
1111 | register STR *str; |
1112 | register int i; |
1113 | |
1114 | for (i = 1; i <= maxsarg; i++) { |
a687059c |
1115 | (void)apush(savestack,sarg[i]); /* remember the pointer */ |
1116 | str = Str_new(18,0); |
378cc40b |
1117 | str_sset(str,sarg[i]); |
a687059c |
1118 | (void)apush(savestack,str); /* remember the value */ |
d8f2e4cc |
1119 | sarg[i]->str_u.str_useful = -1; |
378cc40b |
1120 | } |
1121 | } |
1122 | |
1123 | void |
1124 | restorelist(base) |
1125 | int base; |
1126 | { |
1127 | register STR *str; |
1128 | register STR *value; |
a687059c |
1129 | register STAB *stab; |
378cc40b |
1130 | |
a687059c |
1131 | if (base < -1) |
1132 | fatal("panic: corrupt saved stack index"); |
378cc40b |
1133 | while (savestack->ary_fill > base) { |
1134 | value = apop(savestack); |
a687059c |
1135 | switch (value->str_state) { |
1136 | case SS_NORM: /* normal string */ |
1137 | case SS_INCR: |
1138 | str = apop(savestack); |
1139 | str_replace(str,value); |
1140 | STABSET(str); |
1141 | break; |
1142 | case SS_SARY: /* array reference */ |
1143 | stab = value->str_u.str_stab; |
1144 | afree(stab_xarray(stab)); |
1145 | stab_xarray(stab) = (ARRAY*)value->str_ptr; |
1146 | value->str_ptr = Nullch; |
1147 | str_free(value); |
1148 | break; |
1149 | case SS_SHASH: /* hash reference */ |
1150 | stab = value->str_u.str_stab; |
39c3038c |
1151 | (void)hfree(stab_xhash(stab), FALSE); |
a687059c |
1152 | stab_xhash(stab) = (HASH*)value->str_ptr; |
1153 | value->str_ptr = Nullch; |
1154 | str_free(value); |
1155 | break; |
1156 | case SS_SINT: /* int reference */ |
1157 | *((int*)value->str_ptr) = (int)value->str_u.str_useful; |
1158 | value->str_ptr = Nullch; |
1159 | str_free(value); |
1160 | break; |
1161 | case SS_SLONG: /* long reference */ |
1162 | *((long*)value->str_ptr) = value->str_u.str_useful; |
1163 | value->str_ptr = Nullch; |
1164 | str_free(value); |
1165 | break; |
1166 | case SS_SSTRP: /* STR* reference */ |
1167 | *((STR**)value->str_ptr) = value->str_magic; |
1168 | value->str_magic = Nullstr; |
1169 | value->str_ptr = Nullch; |
1170 | str_free(value); |
1171 | break; |
1172 | case SS_SHPTR: /* HASH* reference */ |
1173 | *((HASH**)value->str_ptr) = value->str_u.str_hash; |
1174 | value->str_ptr = Nullch; |
1175 | str_free(value); |
1176 | break; |
1177 | case SS_SNSTAB: |
1178 | stab = (STAB*)value->str_magic; |
1179 | value->str_magic = Nullstr; |
1180 | (void)stab_clear(stab); |
1181 | str_free(value); |
1182 | break; |
39c3038c |
1183 | case SS_SCSV: /* callsave structure */ |
1184 | { |
1185 | CSV *csv = (CSV*) value->str_ptr; |
1186 | |
1187 | curcmd = csv->curcmd; |
1188 | curcsv = csv->curcsv; |
1189 | csv->sub->depth = csv->depth; |
1190 | if (csv->hasargs) { /* put back old @_ */ |
1191 | afree(csv->argarray); |
1192 | stab_xarray(defstab) = csv->savearray; |
1193 | } |
1194 | str_free(value); |
1195 | } |
1196 | break; |
a687059c |
1197 | default: |
1198 | fatal("panic: restorelist inconsistency"); |
1199 | } |
378cc40b |
1200 | } |
1201 | } |
a687059c |
1202 | |
bf38876a |
1203 | #ifdef DEBUGGING |
a687059c |
1204 | void |
1205 | grow_dlevel() |
1206 | { |
1207 | dlmax += 128; |
1208 | Renew(debname, dlmax, char); |
1209 | Renew(debdelim, dlmax, char); |
1210 | } |
bf38876a |
1211 | #endif |