1 /* $Header: consarg.c,v 3.0.1.5 90/03/27 15:36:45 lwall Locked $
3 * Copyright (c) 1989, Larry Wall
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.
9 * Revision 3.0.1.5 90/03/27 15:36:45 lwall
10 * patch16: support for machines that can't cast negative floats to unsigned ints
12 * Revision 3.0.1.4 90/03/12 16:24:40 lwall
13 * patch13: return (@array) did counter-intuitive things
15 * Revision 3.0.1.3 90/02/28 16:47:54 lwall
16 * patch9: the x operator is now up to 10 times faster
17 * patch9: @_ clobbered by ($foo,$bar) = split
19 * Revision 3.0.1.2 89/11/17 15:11:34 lwall
20 * patch5: defined $foo{'bar'} should not create element
22 * Revision 3.0.1.1 89/11/11 04:14:30 lwall
23 * patch2: '-' x 26 made warnings about undefined value
24 * patch2: eval with no args caused strangeness
25 * patch2: local(@foo) didn't work, but local(@foo,$bar) did
27 * Revision 3.0 89/10/18 15:10:30 lwall
34 static int nothing_in_common();
35 static int arg_common();
36 static int spat_common();
39 make_split(stab,arg,limarg)
46 if (arg->arg_type != O_MATCH) {
47 Newz(201,spat,1,SPAT);
48 spat->spat_next = curstash->tbl_spatroot; /* link into spat list */
49 curstash->tbl_spatroot = spat;
51 spat->spat_runtime = arg;
52 arg = make_match(O_MATCH,stab2arg(A_STAB,defstab),spat);
57 if (limarg->arg_type == O_ITEM) {
58 Copy(limarg+1,arg+3,1,ARG);
59 limarg[1].arg_type = A_NULL;
63 arg[3].arg_type = A_EXPR;
64 arg[3].arg_ptr.arg_arg = limarg;
68 arg[3].arg_type = A_NULL;
69 arg->arg_type = O_SPLIT;
70 spat = arg[2].arg_ptr.arg_spat;
71 spat->spat_repl = stab2arg(A_STAB,aadd(stab));
72 if (spat->spat_short) { /* exact match can bypass regexec() */
73 if (!((spat->spat_flags & SPAT_SCANFIRST) &&
74 (spat->spat_flags & SPAT_ALL) )) {
75 str_free(spat->spat_short);
76 spat->spat_short = Nullstr;
83 mod_match(type,left,pat)
91 if ((pat->arg_type == O_MATCH ||
92 pat->arg_type == O_SUBST ||
93 pat->arg_type == O_TRANS ||
94 pat->arg_type == O_SPLIT
96 pat[1].arg_ptr.arg_stab == defstab ) {
97 switch (pat->arg_type) {
99 newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH,
101 left,Nullarg,Nullarg);
104 newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST,
106 left,Nullarg,Nullarg));
109 newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS,
111 left,Nullarg,Nullarg));
114 newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT,
116 left,Nullarg,Nullarg);
119 if (pat->arg_len >= 2) {
120 newarg[2].arg_type = pat[2].arg_type;
121 newarg[2].arg_ptr = pat[2].arg_ptr;
122 newarg[2].arg_flags = pat[2].arg_flags;
123 if (pat->arg_len >= 3) {
124 newarg[3].arg_type = pat[3].arg_type;
125 newarg[3].arg_ptr = pat[3].arg_ptr;
126 newarg[3].arg_flags = pat[3].arg_flags;
132 Newz(202,spat,1,SPAT);
133 spat->spat_next = curstash->tbl_spatroot; /* link into spat list */
134 curstash->tbl_spatroot = spat;
136 spat->spat_runtime = pat;
137 newarg = make_op(type,2,left,Nullarg,Nullarg);
138 newarg[2].arg_type = A_SPAT | A_DONT;
139 newarg[2].arg_ptr.arg_spat = spat;
146 make_op(type,newlen,arg1,arg2,arg3)
156 extern ARG *arg4; /* should be normal arguments, really */
159 arg = op_new(newlen);
160 arg->arg_type = type;
161 doarg = opargs[type];
163 if (chld->arg_type == O_ITEM &&
164 (hoistable[chld[1].arg_type] || chld[1].arg_type == A_LVAL ||
165 (chld[1].arg_type == A_LEXPR &&
166 (chld[1].arg_ptr.arg_arg->arg_type == O_LIST ||
167 chld[1].arg_ptr.arg_arg->arg_type == O_ARRAY ||
168 chld[1].arg_ptr.arg_arg->arg_type == O_HASH ))))
170 arg[1].arg_type = chld[1].arg_type;
171 arg[1].arg_ptr = chld[1].arg_ptr;
172 arg[1].arg_flags |= chld[1].arg_flags;
173 arg[1].arg_len = chld[1].arg_len;
177 arg[1].arg_type = A_EXPR;
178 arg[1].arg_ptr.arg_arg = chld;
181 arg[1].arg_type |= A_DONT;
183 arg[1].arg_flags |= AF_ARYOK;
187 if (chld->arg_type == O_ITEM &&
188 (hoistable[chld[1].arg_type] ||
190 ((chld[1].arg_type == A_READ && !(arg[1].arg_type & A_DONT))
192 (chld[1].arg_type == A_INDREAD && !(arg[1].arg_type & A_DONT))
194 (chld[1].arg_type == A_GLOB && !(arg[1].arg_type & A_DONT))
196 arg[2].arg_type = chld[1].arg_type;
197 arg[2].arg_ptr = chld[1].arg_ptr;
198 arg[2].arg_len = chld[1].arg_len;
202 arg[2].arg_type = A_EXPR;
203 arg[2].arg_ptr.arg_arg = chld;
206 arg[2].arg_type |= A_DONT;
208 arg[2].arg_flags |= AF_ARYOK;
212 if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) {
213 arg[3].arg_type = chld[1].arg_type;
214 arg[3].arg_ptr = chld[1].arg_ptr;
215 arg[3].arg_len = chld[1].arg_len;
219 arg[3].arg_type = A_EXPR;
220 arg[3].arg_ptr.arg_arg = chld;
223 arg[3].arg_type |= A_DONT;
225 arg[3].arg_flags |= AF_ARYOK;
227 if (newlen >= 4 && (chld = arg4)) {
228 if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) {
229 arg[4].arg_type = chld[1].arg_type;
230 arg[4].arg_ptr = chld[1].arg_ptr;
231 arg[4].arg_len = chld[1].arg_len;
235 arg[4].arg_type = A_EXPR;
236 arg[4].arg_ptr.arg_arg = chld;
239 if (newlen >= 5 && (chld = arg5)) {
240 if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type]) {
241 arg[5].arg_type = chld[1].arg_type;
242 arg[5].arg_ptr = chld[1].arg_ptr;
243 arg[5].arg_len = chld[1].arg_len;
247 arg[5].arg_type = A_EXPR;
248 arg[5].arg_ptr.arg_arg = chld;
253 fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]);
255 fprintf(stderr,",%s=%lx",
256 argname[arg[1].arg_type&A_MASK],arg[1].arg_ptr.arg_arg);
258 fprintf(stderr,",%s=%lx",
259 argname[arg[2].arg_type&A_MASK],arg[2].arg_ptr.arg_arg);
261 fprintf(stderr,",%s=%lx",
262 argname[arg[3].arg_type&A_MASK],arg[3].arg_ptr.arg_arg);
264 fprintf(stderr,",%s=%lx",
265 argname[arg[4].arg_type&A_MASK],arg[4].arg_ptr.arg_arg);
267 fprintf(stderr,",%s=%lx",
268 argname[arg[5].arg_type&A_MASK],arg[5].arg_ptr.arg_arg);
269 fprintf(stderr,")\n");
272 evalstatic(arg); /* see if we can consolidate anything */
283 double value; /* must not be register */
286 unsigned long tmplong;
288 double exp(), log(), sqrt(), modf();
290 double sin(), cos(), atan2(), pow();
292 if (!arg || !arg->arg_len)
295 if ((arg[1].arg_type == A_SINGLE || arg->arg_type == O_AELEM) &&
296 (arg->arg_len == 1 || arg[2].arg_type == A_SINGLE) ) {
298 s1 = arg[1].arg_ptr.arg_str;
299 if (arg->arg_len > 1)
300 s2 = arg[2].arg_ptr.arg_str;
303 switch (arg->arg_type) {
305 i = (int)str_gnum(s2);
306 if (i < 32767 && i >= 0) {
307 arg->arg_type = O_ITEM;
309 arg[1].arg_type = A_ARYSTAB; /* $abc[123] is hoistable now */
311 arg[1].arg_ptr = arg[1].arg_ptr; /* get stab pointer */
317 str = Nullstr; /* can't be evaluated yet */
324 i = (int)str_gnum(s2);
327 STR_GROW(str, i * s1->str_cur + 1);
328 repeatcpy(str->str_ptr, tmps, s1->str_cur, i);
329 str->str_cur = i * s1->str_cur;
330 str->str_ptr[str->str_cur] = '\0';
333 value = str_gnum(s1);
334 str_numset(str,value * str_gnum(s2));
337 value = str_gnum(s2);
339 yyerror("Illegal division by constant zero");
341 str_numset(str,str_gnum(s1) / value);
344 tmplong = (unsigned long)str_gnum(s2);
346 yyerror("Illegal modulus of constant zero");
349 tmp2 = (long)str_gnum(s1);
352 str_numset(str,(double)(tmp2 % tmplong));
354 str_numset(str,(double)(tmplong - (-tmp2 % tmplong)));
360 value = str_gnum(s1);
361 str_numset(str,value + str_gnum(s2));
364 value = str_gnum(s1);
365 str_numset(str,value - str_gnum(s2));
368 value = str_gnum(s1);
369 i = (int)str_gnum(s2);
371 str_numset(str,(double)(((long)value) << i));
375 value = str_gnum(s1);
376 i = (int)str_gnum(s2);
378 str_numset(str,(double)(((long)value) >> i));
382 value = str_gnum(s1);
383 str_numset(str,(value < str_gnum(s2)) ? 1.0 : 0.0);
386 value = str_gnum(s1);
387 str_numset(str,(value > str_gnum(s2)) ? 1.0 : 0.0);
390 value = str_gnum(s1);
391 str_numset(str,(value <= str_gnum(s2)) ? 1.0 : 0.0);
394 value = str_gnum(s1);
395 str_numset(str,(value >= str_gnum(s2)) ? 1.0 : 0.0);
399 if ((!s1->str_nok && !looks_like_number(s1)) ||
400 (!s2->str_nok && !looks_like_number(s2)) )
401 warn("Possible use of == on string value");
403 value = str_gnum(s1);
404 str_numset(str,(value == str_gnum(s2)) ? 1.0 : 0.0);
407 value = str_gnum(s1);
408 str_numset(str,(value != str_gnum(s2)) ? 1.0 : 0.0);
411 value = str_gnum(s1);
413 str_numset(str,(double)(U_L(value) & U_L(str_gnum(s2))));
417 value = str_gnum(s1);
419 str_numset(str,(double)(U_L(value) ^ U_L(str_gnum(s2))));
423 value = str_gnum(s1);
425 str_numset(str,(double)(U_L(value) | U_L(str_gnum(s2))));
441 if ((arg[3].arg_type & A_MASK) != A_SINGLE) {
449 str_sset(str,arg[3].arg_ptr.arg_str);
450 str_free(arg[3].arg_ptr.arg_str);
454 str_numset(str,(double)(-str_gnum(s1)));
457 str_numset(str,(double)(!str_true(s1)));
461 str_numset(str,(double)(~U_L(str_gnum(s1))));
465 str_numset(str,sin(str_gnum(s1)));
468 str_numset(str,cos(str_gnum(s1)));
471 value = str_gnum(s1);
472 str_numset(str,atan2(value, str_gnum(s2)));
475 value = str_gnum(s1);
476 str_numset(str,pow(value, str_gnum(s2)));
479 str_numset(str, (double)str_len(s1));
482 str_numset(str,(double)(str_cmp(s1,s2) < 0));
485 str_numset(str,(double)(str_cmp(s1,s2) > 0));
488 str_numset(str,(double)(str_cmp(s1,s2) <= 0));
491 str_numset(str,(double)(str_cmp(s1,s2) >= 0));
494 str_numset(str,(double)(str_eq(s1,s2)));
497 str_numset(str,(double)(!str_eq(s1,s2)));
502 str_set(str,crypt(tmps,str_get(s2)));
505 "The crypt() function is unimplemented due to excessive paranoia.");
509 str_numset(str,exp(str_gnum(s1)));
512 str_numset(str,log(str_gnum(s1)));
515 str_numset(str,sqrt(str_gnum(s1)));
518 value = str_gnum(s1);
520 (void)modf(value,&value);
522 (void)modf(-value,&value);
525 str_numset(str,value);
529 str_numset(str,(double)(*str_get(s1)));
537 str_numset(str,(double)(zapc));
543 arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */
546 arg[1].arg_ptr.arg_str = str;
561 i = arg[1].arg_type & A_MASK;
563 arg->arg_flags |= AF_COMMON; /* assume something in common */
564 /* which forces us to copy things */
567 arg[1].arg_type = A_LARYLEN;
570 if (i == A_ARYSTAB) {
571 arg[1].arg_type = A_LARYSTAB;
575 /* see if it's an array reference */
577 if (i == A_EXPR || i == A_LEXPR) {
578 arg1 = arg[1].arg_ptr.arg_arg;
580 if (arg1->arg_type == O_LIST || arg1->arg_type == O_ITEM) {
582 if (arg->arg_len > 1) {
584 arg2 = arg[2].arg_ptr.arg_arg;
585 if (nothing_in_common(arg1,arg2))
586 arg->arg_flags &= ~AF_COMMON;
587 if (arg->arg_type == O_ASSIGN) {
588 if (arg1->arg_flags & AF_LOCAL)
589 arg->arg_flags |= AF_LOCAL;
590 arg[1].arg_flags |= AF_ARYOK;
591 arg[2].arg_flags |= AF_ARYOK;
594 else if (arg->arg_type != O_CHOP)
595 arg->arg_type = O_ASSIGN; /* possible local(); */
596 for (i = arg1->arg_len; i >= 1; i--) {
597 switch (arg1[i].arg_type) {
598 case A_STAR: case A_LSTAR:
599 arg1[i].arg_type = A_LSTAR;
601 case A_STAB: case A_LVAL:
602 arg1[i].arg_type = A_LVAL;
604 case A_ARYLEN: case A_LARYLEN:
605 arg1[i].arg_type = A_LARYLEN;
607 case A_ARYSTAB: case A_LARYSTAB:
608 arg1[i].arg_type = A_LARYSTAB;
610 case A_EXPR: case A_LEXPR:
611 arg1[i].arg_type = A_LEXPR;
612 switch(arg1[i].arg_ptr.arg_arg->arg_type) {
613 case O_ARRAY: case O_LARRAY:
614 arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY;
617 case O_AELEM: case O_LAELEM:
618 arg1[i].arg_ptr.arg_arg->arg_type = O_LAELEM;
620 case O_HASH: case O_LHASH:
621 arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH;
624 case O_HELEM: case O_LHELEM:
625 arg1[i].arg_ptr.arg_arg->arg_type = O_LHELEM;
627 case O_ASLICE: case O_LASLICE:
628 arg1[i].arg_ptr.arg_arg->arg_type = O_LASLICE;
630 case O_HSLICE: case O_LHSLICE:
631 arg1[i].arg_ptr.arg_arg->arg_type = O_LHSLICE;
639 (void)sprintf(tokenbuf, "Illegal item (%s) as lvalue",
640 argname[arg1[i].arg_type&A_MASK]);
644 if (arg->arg_len > 1) {
645 if (arg2->arg_type == O_SPLIT && !arg2[3].arg_type && !arghog) {
646 arg2[3].arg_type = A_SINGLE;
647 arg2[3].arg_ptr.arg_str =
648 str_nmake((double)arg1->arg_len + 1); /* limit split len*/
652 else if (arg1->arg_type == O_AELEM || arg1->arg_type == O_LAELEM)
653 if (arg->arg_type == O_DEFINED)
654 arg1->arg_type = O_AELEM;
656 arg1->arg_type = O_LAELEM;
657 else if (arg1->arg_type == O_ARRAY || arg1->arg_type == O_LARRAY) {
658 arg1->arg_type = O_LARRAY;
659 if (arg->arg_len > 1) {
661 arg2 = arg[2].arg_ptr.arg_arg;
662 if (arg2->arg_type == O_SPLIT) { /* use split's builtin =?*/
663 spat = arg2[2].arg_ptr.arg_spat;
664 if (!(spat->spat_flags & SPAT_ONCE) &&
665 nothing_in_common(arg1,spat->spat_repl)) {
666 spat->spat_repl[1].arg_ptr.arg_stab =
667 arg1[1].arg_ptr.arg_stab;
668 spat->spat_flags |= SPAT_ONCE;
669 arg_free(arg1); /* recursive */
670 free_arg(arg); /* non-recursive */
671 return arg2; /* split has builtin assign */
674 else if (nothing_in_common(arg1,arg2))
675 arg->arg_flags &= ~AF_COMMON;
676 if (arg->arg_type == O_ASSIGN) {
677 arg[1].arg_flags |= AF_ARYOK;
678 arg[2].arg_flags |= AF_ARYOK;
681 else if (arg->arg_type == O_ASSIGN)
682 arg[1].arg_flags |= AF_ARYOK;
684 else if (arg1->arg_type == O_HELEM || arg1->arg_type == O_LHELEM)
685 if (arg->arg_type == O_DEFINED)
686 arg1->arg_type = O_HELEM; /* avoid creating one */
688 arg1->arg_type = O_LHELEM;
689 else if (arg1->arg_type == O_HASH || arg1->arg_type == O_LHASH) {
690 arg1->arg_type = O_LHASH;
691 if (arg->arg_len > 1) {
693 arg2 = arg[2].arg_ptr.arg_arg;
694 if (nothing_in_common(arg1,arg2))
695 arg->arg_flags &= ~AF_COMMON;
696 if (arg->arg_type == O_ASSIGN) {
697 arg[1].arg_flags |= AF_ARYOK;
698 arg[2].arg_flags |= AF_ARYOK;
701 else if (arg->arg_type == O_ASSIGN)
702 arg[1].arg_flags |= AF_ARYOK;
704 else if (arg1->arg_type == O_ASLICE) {
705 arg1->arg_type = O_LASLICE;
706 if (arg->arg_type == O_ASSIGN) {
707 arg[1].arg_flags |= AF_ARYOK;
708 arg[2].arg_flags |= AF_ARYOK;
711 else if (arg1->arg_type == O_HSLICE) {
712 arg1->arg_type = O_LHSLICE;
713 if (arg->arg_type == O_ASSIGN) {
714 arg[1].arg_flags |= AF_ARYOK;
715 arg[2].arg_flags |= AF_ARYOK;
718 else if ((arg->arg_type == O_DEFINED || arg->arg_type == O_UNDEF) &&
719 (arg1->arg_type == (perldb ? O_DBSUBR : O_SUBR)) ) {
720 arg[1].arg_type |= A_DONT;
722 else if (arg1->arg_type == O_SUBSTR || arg1->arg_type == O_VEC) {
724 Renewc(arg1->arg_ptr.arg_str, 1, struct lstring, STR);
725 /* grow string struct to hold an lstring struct */
727 else if (arg1->arg_type == O_ASSIGN) {
728 if (arg->arg_type == O_CHOP)
729 arg[1].arg_flags &= ~AF_ARYOK; /* grandfather chop idiom */
732 (void)sprintf(tokenbuf,
733 "Illegal expression (%s) as lvalue",opname[arg1->arg_type]);
736 arg[1].arg_type = A_LEXPR | (arg[1].arg_type & A_DONT);
737 if (arg->arg_type == O_ASSIGN && (arg1[1].arg_flags & AF_ARYOK)) {
738 arg[1].arg_flags |= AF_ARYOK;
739 if (arg->arg_len > 1)
740 arg[2].arg_flags |= AF_ARYOK;
744 fprintf(stderr,"lval LEXPR\n");
748 if (i == A_STAR || i == A_LSTAR) {
749 arg[1].arg_type = A_LSTAR | (arg[1].arg_type & A_DONT);
753 /* not an array reference, should be a register name */
755 if (i != A_STAB && i != A_LVAL) {
756 (void)sprintf(tokenbuf,
757 "Illegal item (%s) as lvalue",argname[arg[1].arg_type&A_MASK]);
760 arg[1].arg_type = A_LVAL | (arg[1].arg_type & A_DONT);
763 fprintf(stderr,"lval LVAL\n");
773 if (type == O_DEFINED || type == O_UNDEF) {
774 if (arg->arg_type != O_ITEM)
776 if (arg->arg_type == O_ITEM) {
777 type = arg[1].arg_type & A_MASK;
778 if (type == A_EXPR || type == A_LEXPR)
779 arg[1].arg_type = A_LEXPR|A_DONT;
790 if (arg[i].arg_type != A_EXPR) { /* dehoist */
791 tmparg = make_op(O_ITEM,1,Nullarg,Nullarg,Nullarg);
793 arg[i].arg_ptr.arg_arg = tmparg;
794 arg[i].arg_type = A_EXPR;
799 addflags(i,flags,arg)
802 arg[i].arg_flags |= flags;
810 if (arg->arg_type == O_ARRAY || arg->arg_type == O_HASH)
811 return make_op(O_ITEM,1,arg,Nullarg,Nullarg);
815 /* maybe do a join on multiple array dimensions */
821 if (arg && arg->arg_type == O_COMMA) {
823 arg = make_op(O_JOIN, 2,
824 stab2arg(A_STAB,stabent(";",TRUE)),
837 register ARG *nxtnode;
843 arg->arg_type = O_LIST;
845 if (arg->arg_type != O_COMMA) {
846 if (arg->arg_type != O_ARRAY)
847 arg->arg_flags |= AF_LISTISH; /* see listish() below */
850 for (i = 2, node = arg; ; i++) {
851 if (node->arg_len < 2)
853 if (node[1].arg_type != A_EXPR)
855 node = node[1].arg_ptr.arg_arg;
856 if (node->arg_type != O_COMMA)
862 tmpstr = arg->arg_ptr.arg_str;
864 *arg = *node; /* copy everything except the STR */
866 (void)bcopy((char *)node, (char *)arg, sizeof(ARG));
868 arg->arg_ptr.arg_str = tmpstr;
873 (void)bcopy((char *)(node+2), (char *)(arg+j), sizeof(ARG));
875 arg[j].arg_flags |= AF_ARYOK;
876 --j; /* Bug in Xenix compiler */
881 (void)bcopy((char *)(node+1), (char *)(arg+1), sizeof(ARG));
886 nxtnode = node[1].arg_ptr.arg_arg;
891 arg[1].arg_flags |= AF_ARYOK;
892 arg[2].arg_flags |= AF_ARYOK;
893 arg->arg_type = O_LIST;
898 /* turn a single item into a list */
904 if (arg->arg_flags & AF_LISTISH)
905 arg = make_op(O_LIST,1,arg,Nullarg,Nullarg);
910 maybelistish(optype, arg)
916 if (optype == O_RETURN && arg->arg_type == O_ITEM &&
917 arg[1].arg_type == A_EXPR && (tmparg = arg[1].arg_ptr.arg_arg) &&
918 ((tmparg->arg_flags & AF_LISTISH) || (tmparg->arg_type == O_ARRAY) )) {
919 tmparg = listish(tmparg);
923 else if (optype == O_PRTF ||
924 (arg->arg_type == O_ASLICE || arg->arg_type == O_HSLICE ||
925 arg->arg_type == O_F_OR_R) )
930 /* mark list of local variables */
936 arg->arg_flags |= AF_LOCAL;
945 if (arg->arg_len == 0)
946 arg[1].arg_type = A_NULL;
948 arg[2].arg_ptr.arg_hash = curstash;
949 arg[2].arg_type = A_NULL;
957 if (arg->arg_type == O_CONCAT && arg[2].arg_type == A_READ) {
958 arg->arg_type = O_RCAT;
959 arg[2].arg_type = arg[2].arg_ptr.arg_arg[1].arg_type;
960 arg[2].arg_ptr = arg[2].arg_ptr.arg_arg[1].arg_ptr;
961 free_arg(arg[2].arg_ptr.arg_arg);
974 arg->arg_type = O_ITEM;
975 arg[1].arg_type = atype;
976 arg[1].arg_ptr.arg_stab = stab;
987 arg->arg_type = O_ITEM;
988 arg[1].arg_type = A_SINGLE;
989 arg[1].arg_ptr.arg_str = str_make(cval,0);
1000 Newz(203,arg, numargs + 1, ARG);
1001 arg->arg_ptr.arg_str = Str_new(21,0);
1002 arg->arg_len = numargs;
1010 str_free(arg->arg_ptr.arg_str);
1015 make_match(type,expr,spat)
1022 arg = make_op(type,2,expr,Nullarg,Nullarg);
1024 arg[2].arg_type = A_SPAT|A_DONT;
1025 arg[2].arg_ptr.arg_spat = spat;
1028 fprintf(stderr,"make_match SPAT=%lx\n",(long)spat);
1031 if (type == O_SUBST || type == O_NSUBST) {
1032 if (arg[1].arg_type != A_STAB) {
1033 yyerror("Illegal lvalue");
1035 arg[1].arg_type = A_LVAL;
1047 arg->arg_type = O_ITEM;
1048 arg[1].arg_type = A_CMD;
1049 arg[1].arg_ptr.arg_cmd = cmd;
1053 /* Check two expressions to see if there is any identifier in common */
1056 nothing_in_common(arg1,arg2)
1060 static int thisexpr = 0; /* I don't care if this wraps */
1063 if (arg_common(arg1,thisexpr,1))
1064 return 0; /* hit eval or do {} */
1065 if (arg_common(arg2,thisexpr,0))
1066 return 0; /* hit identifier again */
1070 /* Recursively descend an expression and mark any identifier or check
1071 * it to see if it was marked already.
1075 arg_common(arg,exprnum,marking)
1084 for (i = arg->arg_len; i >= 1; i--) {
1085 switch (arg[i].arg_type & A_MASK) {
1090 if (arg_common(arg[i].arg_ptr.arg_arg,exprnum,marking))
1094 return 1; /* assume hanky panky */
1102 stab_lastexpr(arg[i].arg_ptr.arg_stab) = exprnum;
1103 else if (stab_lastexpr(arg[i].arg_ptr.arg_stab) == exprnum)
1109 register char *s = arg[i].arg_ptr.arg_str->str_ptr;
1110 register char *send = s + arg[i].arg_ptr.arg_str->str_cur;
1111 register STAB *stab;
1114 if (*s == '$' && s[1]) {
1115 s = scanreg(s,send,tokenbuf);
1116 stab = stabent(tokenbuf,TRUE);
1118 stab_lastexpr(stab) = exprnum;
1119 else if (stab_lastexpr(stab) == exprnum)
1123 else if (*s == '\\' && s[1])
1130 if (spat_common(arg[i].arg_ptr.arg_spat,exprnum,marking))
1141 switch (arg->arg_type) {
1144 if ((arg[1].arg_type & A_MASK) == A_STAB)
1145 (void)aadd(arg[1].arg_ptr.arg_stab);
1149 if ((arg[1].arg_type & A_MASK) == A_STAB)
1150 (void)hadd(arg[1].arg_ptr.arg_stab);
1161 spat_common(spat,exprnum,marking)
1162 register SPAT *spat;
1166 if (spat->spat_runtime)
1167 if (arg_common(spat->spat_runtime,exprnum,marking))
1169 if (spat->spat_repl) {
1170 if (arg_common(spat->spat_repl,exprnum,marking))