1 /* $RCSfile: consarg.c,v $$Revision: 4.0.1.3 $$Date: 91/11/05 16:21:16 $
3 * Copyright (c) 1991, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
9 * Revision 4.0.1.3 91/11/05 16:21:16 lwall
10 * patch11: random cleanup
11 * patch11: added eval {}
12 * patch11: added sort {} LIST
13 * patch11: "foo" x -1 dumped core
14 * patch11: substr() and vec() weren't allowed in an lvalue list
16 * Revision 4.0.1.2 91/06/07 10:33:12 lwall
17 * patch4: new copyright notice
18 * patch4: length($`), length($&), length($') now optimized to avoid string copy
20 * Revision 4.0.1.1 91/04/11 17:38:34 lwall
21 * patch1: fixed "Bad free" error
23 * Revision 4.0 91/03/20 01:06:15 lwall
30 static int nothing_in_common();
31 static int arg_common();
32 static int spat_common();
35 make_split(stab,arg,limarg)
42 if (arg->arg_type != O_MATCH) {
43 Newz(201,spat,1,SPAT);
44 spat->spat_next = curstash->tbl_spatroot; /* link into spat list */
45 curstash->tbl_spatroot = spat;
47 spat->spat_runtime = arg;
48 arg = make_match(O_MATCH,stab2arg(A_STAB,defstab),spat);
53 if (limarg->arg_type == O_ITEM) {
54 Copy(limarg+1,arg+3,1,ARG);
55 limarg[1].arg_type = A_NULL;
60 arg[3].arg_type = A_EXPR;
61 arg[3].arg_ptr.arg_arg = limarg;
66 arg[3].arg_type = A_NULL;
67 arg[3].arg_ptr.arg_arg = Nullarg;
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)
94 if ((pat->arg_type == O_MATCH ||
95 pat->arg_type == O_SUBST ||
96 pat->arg_type == O_TRANS ||
97 pat->arg_type == O_SPLIT
99 pat[1].arg_ptr.arg_stab == defstab ) {
100 switch (pat->arg_type) {
102 newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH,
104 left,Nullarg,Nullarg);
107 newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST,
109 left,Nullarg,Nullarg));
112 newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS,
114 left,Nullarg,Nullarg));
117 newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT,
119 left,Nullarg,Nullarg);
122 if (pat->arg_len >= 2) {
123 newarg[2].arg_type = pat[2].arg_type;
124 newarg[2].arg_ptr = pat[2].arg_ptr;
125 newarg[2].arg_len = pat[2].arg_len;
126 newarg[2].arg_flags = pat[2].arg_flags;
127 if (pat->arg_len >= 3) {
128 newarg[3].arg_type = pat[3].arg_type;
129 newarg[3].arg_ptr = pat[3].arg_ptr;
130 newarg[3].arg_len = pat[3].arg_len;
131 newarg[3].arg_flags = pat[3].arg_flags;
137 Newz(202,spat,1,SPAT);
138 spat->spat_next = curstash->tbl_spatroot; /* link into spat list */
139 curstash->tbl_spatroot = spat;
141 spat->spat_runtime = pat;
142 newarg = make_op(type,2,left,Nullarg,Nullarg);
143 newarg[2].arg_type = A_SPAT | A_DONT;
144 newarg[2].arg_ptr.arg_spat = spat;
151 make_op(type,newlen,arg1,arg2,arg3)
160 register unsigned doarg;
162 extern ARG *arg4; /* should be normal arguments, really */
165 arg = op_new(newlen);
166 arg->arg_type = type;
169 if (chld->arg_type == O_ITEM &&
170 (hoistable[ i = (chld[1].arg_type&A_MASK)] || i == A_LVAL ||
172 (chld[1].arg_ptr.arg_arg->arg_type == O_LIST ||
173 chld[1].arg_ptr.arg_arg->arg_type == O_ARRAY ||
174 chld[1].arg_ptr.arg_arg->arg_type == O_HASH ))))
176 arg[1].arg_type = chld[1].arg_type;
177 arg[1].arg_ptr = chld[1].arg_ptr;
178 arg[1].arg_flags |= chld[1].arg_flags;
179 arg[1].arg_len = chld[1].arg_len;
183 arg[1].arg_type = A_EXPR;
184 arg[1].arg_ptr.arg_arg = chld;
189 if (chld->arg_type == O_ITEM &&
190 (hoistable[chld[1].arg_type&A_MASK] ||
192 ((chld[1].arg_type == A_READ && !(arg[1].arg_type & A_DONT))
194 (chld[1].arg_type == A_INDREAD && !(arg[1].arg_type & A_DONT))
196 (chld[1].arg_type == A_GLOB && !(arg[1].arg_type & A_DONT))
198 arg[2].arg_type = chld[1].arg_type;
199 arg[2].arg_ptr = chld[1].arg_ptr;
200 arg[2].arg_len = chld[1].arg_len;
204 arg[2].arg_type = A_EXPR;
205 arg[2].arg_ptr.arg_arg = chld;
210 if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) {
211 arg[3].arg_type = chld[1].arg_type;
212 arg[3].arg_ptr = chld[1].arg_ptr;
213 arg[3].arg_len = chld[1].arg_len;
217 arg[3].arg_type = A_EXPR;
218 arg[3].arg_ptr.arg_arg = chld;
221 if (newlen >= 4 && (chld = arg4)) {
222 if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) {
223 arg[4].arg_type = chld[1].arg_type;
224 arg[4].arg_ptr = chld[1].arg_ptr;
225 arg[4].arg_len = chld[1].arg_len;
229 arg[4].arg_type = A_EXPR;
230 arg[4].arg_ptr.arg_arg = chld;
233 if (newlen >= 5 && (chld = arg5)) {
234 if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) {
235 arg[5].arg_type = chld[1].arg_type;
236 arg[5].arg_ptr = chld[1].arg_ptr;
237 arg[5].arg_len = chld[1].arg_len;
241 arg[5].arg_type = A_EXPR;
242 arg[5].arg_ptr.arg_arg = chld;
245 doarg = opargs[type];
246 for (i = 1; i <= newlen; ++i) {
248 arg[i].arg_type |= A_DONT;
250 arg[i].arg_flags |= AF_ARYOK;
255 fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]);
257 fprintf(stderr,",%s=%lx",
258 argname[arg[1].arg_type&A_MASK],arg[1].arg_ptr.arg_arg);
260 fprintf(stderr,",%s=%lx",
261 argname[arg[2].arg_type&A_MASK],arg[2].arg_ptr.arg_arg);
263 fprintf(stderr,",%s=%lx",
264 argname[arg[3].arg_type&A_MASK],arg[3].arg_ptr.arg_arg);
266 fprintf(stderr,",%s=%lx",
267 argname[arg[4].arg_type&A_MASK],arg[4].arg_ptr.arg_arg);
269 fprintf(stderr,",%s=%lx",
270 argname[arg[5].arg_type&A_MASK],arg[5].arg_ptr.arg_arg);
271 fprintf(stderr,")\n");
274 arg = evalstatic(arg); /* see if we can consolidate anything */
282 static STR *str = Nullstr;
285 double value; /* must not be register */
288 unsigned long tmplong;
290 double exp(), log(), sqrt(), modf();
292 double sin(), cos(), atan2(), pow();
294 if (!arg || !arg->arg_len)
300 if (arg[1].arg_type == A_SINGLE)
301 s1 = arg[1].arg_ptr.arg_str;
304 if (arg->arg_len >= 2 && arg[2].arg_type == A_SINGLE)
305 s2 = arg[2].arg_ptr.arg_str;
309 #define CHECK1 if (!s1) return arg
310 #define CHECK2 if (!s2) return arg
311 #define CHECK12 if (!s1 || !s2) return arg
313 switch (arg->arg_type) {
317 if (arg[1].arg_type == A_CMD)
318 arg[1].arg_type |= A_DONT;
321 if (arg[1].arg_type == A_CMD) {
322 arg->arg_type = O_TRY;
323 arg[1].arg_type |= A_DONT;
327 arg->arg_type = O_EVALONCE;
331 i = (int)str_gnum(s2);
332 if (i < 32767 && i >= 0) {
333 arg->arg_type = O_ITEM;
335 arg[1].arg_type = A_ARYSTAB; /* $abc[123] is hoistable now */
348 i = (int)str_gnum(s2);
352 STR_GROW(str, i * s1->str_cur + 1);
353 repeatcpy(str->str_ptr, tmps, s1->str_cur, i);
354 str->str_cur = i * s1->str_cur;
355 str->str_ptr[str->str_cur] = '\0';
360 value = str_gnum(s1);
361 str_numset(str,value * str_gnum(s2));
365 value = str_gnum(s2);
367 yyerror("Illegal division by constant zero");
370 /* insure that 20./5. == 4. */
375 if ((double)(int)x == x &&
376 (double)(int)value == value &&
377 (k = (int)x/(int)value)*(int)value == (int)x) {
382 str_numset(str,value);
385 str_numset(str,str_gnum(s1) / value);
390 tmplong = (unsigned long)str_gnum(s2);
392 yyerror("Illegal modulus of constant zero");
395 tmp2 = (long)str_gnum(s1);
398 str_numset(str,(double)(tmp2 % tmplong));
400 str_numset(str,(double)((tmplong-((-tmp2 - 1) % tmplong)) - 1));
407 value = str_gnum(s1);
408 str_numset(str,value + str_gnum(s2));
412 value = str_gnum(s1);
413 str_numset(str,value - str_gnum(s2));
417 value = str_gnum(s1);
418 i = (int)str_gnum(s2);
420 str_numset(str,(double)(((long)value) << i));
425 value = str_gnum(s1);
426 i = (int)str_gnum(s2);
428 str_numset(str,(double)(((long)value) >> i));
433 value = str_gnum(s1);
434 str_numset(str,(value < str_gnum(s2)) ? 1.0 : 0.0);
438 value = str_gnum(s1);
439 str_numset(str,(value > str_gnum(s2)) ? 1.0 : 0.0);
443 value = str_gnum(s1);
444 str_numset(str,(value <= str_gnum(s2)) ? 1.0 : 0.0);
448 value = str_gnum(s1);
449 str_numset(str,(value >= str_gnum(s2)) ? 1.0 : 0.0);
454 if ((!s1->str_nok && !looks_like_number(s1)) ||
455 (!s2->str_nok && !looks_like_number(s2)) )
456 warn("Possible use of == on string value");
458 value = str_gnum(s1);
459 str_numset(str,(value == str_gnum(s2)) ? 1.0 : 0.0);
463 value = str_gnum(s1);
464 str_numset(str,(value != str_gnum(s2)) ? 1.0 : 0.0);
468 value = str_gnum(s1);
469 value -= str_gnum(s2);
472 else if (value < 0.0)
474 str_numset(str,value);
478 value = str_gnum(s1);
480 str_numset(str,(double)(U_L(value) & U_L(str_gnum(s2))));
485 value = str_gnum(s1);
487 str_numset(str,(double)(U_L(value) ^ U_L(str_gnum(s2))));
492 value = str_gnum(s1);
494 str_numset(str,(double)(U_L(value) | U_L(str_gnum(s2))));
513 if ((arg[3].arg_type & A_MASK) != A_SINGLE)
518 str_sset(str,arg[3].arg_ptr.arg_str);
519 str_free(arg[3].arg_ptr.arg_str);
524 str_numset(str,(double)(-str_gnum(s1)));
529 { char xxx = str_true(s1); str_numset(str,(double)!xxx); }
531 str_numset(str,(double)(!str_true(s1)));
537 str_numset(str,(double)(~U_L(str_gnum(s1))));
542 str_numset(str,sin(str_gnum(s1)));
546 str_numset(str,cos(str_gnum(s1)));
550 value = str_gnum(s1);
551 str_numset(str,atan2(value, str_gnum(s2)));
555 value = str_gnum(s1);
556 str_numset(str,pow(value, str_gnum(s2)));
559 if (arg[1].arg_type == A_STAB) {
560 arg->arg_type = O_ITEM;
561 arg[1].arg_type = A_LENSTAB;
565 str_numset(str, (double)str_len(s1));
569 str_numset(str,(double)(str_cmp(s1,s2) < 0));
573 str_numset(str,(double)(str_cmp(s1,s2) > 0));
577 str_numset(str,(double)(str_cmp(s1,s2) <= 0));
581 str_numset(str,(double)(str_cmp(s1,s2) >= 0));
585 str_numset(str,(double)(str_eq(s1,s2)));
589 str_numset(str,(double)(!str_eq(s1,s2)));
593 str_numset(str,(double)(str_cmp(s1,s2)));
599 str_set(str,crypt(tmps,str_get(s2)));
602 "The crypt() function is unimplemented due to excessive paranoia.");
607 str_numset(str,exp(str_gnum(s1)));
611 str_numset(str,log(str_gnum(s1)));
615 str_numset(str,sqrt(str_gnum(s1)));
619 value = str_gnum(s1);
621 (void)modf(value,&value);
623 (void)modf(-value,&value);
626 str_numset(str,value);
631 str_numset(str,(double)(*str_get(s1)));
639 str_numset(str,(double)(zapc));
644 arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */
646 arg[1].arg_ptr.arg_str = str;
649 arg[2].arg_ptr.arg_str = Nullstr;
650 arg[2].arg_type = A_NULL;
667 i = arg[1].arg_type & A_MASK;
669 arg->arg_flags |= AF_COMMON; /* assume something in common */
670 /* which forces us to copy things */
673 arg[1].arg_type = A_LARYLEN;
676 if (i == A_ARYSTAB) {
677 arg[1].arg_type = A_LARYSTAB;
681 /* see if it's an array reference */
683 if (i == A_EXPR || i == A_LEXPR) {
684 arg1 = arg[1].arg_ptr.arg_arg;
686 if (arg1->arg_type == O_LIST || arg1->arg_type == O_ITEM) {
688 if (arg->arg_len > 1) {
690 arg2 = arg[2].arg_ptr.arg_arg;
691 if (nothing_in_common(arg1,arg2))
692 arg->arg_flags &= ~AF_COMMON;
693 if (arg->arg_type == O_ASSIGN) {
694 if (arg1->arg_flags & AF_LOCAL)
695 arg->arg_flags |= AF_LOCAL;
696 arg[1].arg_flags |= AF_ARYOK;
697 arg[2].arg_flags |= AF_ARYOK;
700 else if (arg->arg_type != O_CHOP)
701 arg->arg_type = O_ASSIGN; /* possible local(); */
702 for (i = arg1->arg_len; i >= 1; i--) {
703 switch (arg1[i].arg_type) {
704 case A_STAR: case A_LSTAR:
705 arg1[i].arg_type = A_LSTAR;
707 case A_STAB: case A_LVAL:
708 arg1[i].arg_type = A_LVAL;
710 case A_ARYLEN: case A_LARYLEN:
711 arg1[i].arg_type = A_LARYLEN;
713 case A_ARYSTAB: case A_LARYSTAB:
714 arg1[i].arg_type = A_LARYSTAB;
716 case A_EXPR: case A_LEXPR:
717 arg1[i].arg_type = A_LEXPR;
718 switch(arg1[i].arg_ptr.arg_arg->arg_type) {
719 case O_ARRAY: case O_LARRAY:
720 arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY;
723 case O_AELEM: case O_LAELEM:
724 arg1[i].arg_ptr.arg_arg->arg_type = O_LAELEM;
726 case O_HASH: case O_LHASH:
727 arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH;
730 case O_HELEM: case O_LHELEM:
731 arg1[i].arg_ptr.arg_arg->arg_type = O_LHELEM;
733 case O_ASLICE: case O_LASLICE:
734 arg1[i].arg_ptr.arg_arg->arg_type = O_LASLICE;
736 case O_HSLICE: case O_LHSLICE:
737 arg1[i].arg_ptr.arg_arg->arg_type = O_LHSLICE;
739 case O_SUBSTR: case O_VEC:
740 (void)l(arg1[i].arg_ptr.arg_arg);
741 Renewc(arg1[i].arg_ptr.arg_arg->arg_ptr.arg_str, 1,
742 struct lstring, STR);
743 /* grow string struct to hold an lstring struct */
751 (void)sprintf(tokenbuf, "Illegal item (%s) as lvalue",
752 argname[arg1[i].arg_type&A_MASK]);
756 if (arg->arg_len > 1) {
757 if (arg2->arg_type == O_SPLIT && !arg2[3].arg_type && !arghog) {
758 arg2[3].arg_type = A_SINGLE;
759 arg2[3].arg_ptr.arg_str =
760 str_nmake((double)arg1->arg_len + 1); /* limit split len*/
764 else if (arg1->arg_type == O_AELEM || arg1->arg_type == O_LAELEM)
765 if (arg->arg_type == O_DEFINED)
766 arg1->arg_type = O_AELEM;
768 arg1->arg_type = O_LAELEM;
769 else if (arg1->arg_type == O_ARRAY || arg1->arg_type == O_LARRAY) {
770 arg1->arg_type = O_LARRAY;
771 if (arg->arg_len > 1) {
773 arg2 = arg[2].arg_ptr.arg_arg;
774 if (arg2->arg_type == O_SPLIT) { /* use split's builtin =?*/
775 spat = arg2[2].arg_ptr.arg_spat;
776 if (!(spat->spat_flags & SPAT_ONCE) &&
777 nothing_in_common(arg1,spat->spat_repl)) {
778 spat->spat_repl[1].arg_ptr.arg_stab =
779 arg1[1].arg_ptr.arg_stab;
780 arg1[1].arg_ptr.arg_stab = Nullstab;
781 spat->spat_flags |= SPAT_ONCE;
782 arg_free(arg1); /* recursive */
783 arg[1].arg_ptr.arg_arg = Nullarg;
784 free_arg(arg); /* non-recursive */
785 return arg2; /* split has builtin assign */
788 else if (nothing_in_common(arg1,arg2))
789 arg->arg_flags &= ~AF_COMMON;
790 if (arg->arg_type == O_ASSIGN) {
791 arg[1].arg_flags |= AF_ARYOK;
792 arg[2].arg_flags |= AF_ARYOK;
795 else if (arg->arg_type == O_ASSIGN)
796 arg[1].arg_flags |= AF_ARYOK;
798 else if (arg1->arg_type == O_HELEM || arg1->arg_type == O_LHELEM)
799 if (arg->arg_type == O_DEFINED)
800 arg1->arg_type = O_HELEM; /* avoid creating one */
802 arg1->arg_type = O_LHELEM;
803 else if (arg1->arg_type == O_HASH || arg1->arg_type == O_LHASH) {
804 arg1->arg_type = O_LHASH;
805 if (arg->arg_len > 1) {
807 arg2 = arg[2].arg_ptr.arg_arg;
808 if (nothing_in_common(arg1,arg2))
809 arg->arg_flags &= ~AF_COMMON;
810 if (arg->arg_type == O_ASSIGN) {
811 arg[1].arg_flags |= AF_ARYOK;
812 arg[2].arg_flags |= AF_ARYOK;
815 else if (arg->arg_type == O_ASSIGN)
816 arg[1].arg_flags |= AF_ARYOK;
818 else if (arg1->arg_type == O_ASLICE) {
819 arg1->arg_type = O_LASLICE;
820 if (arg->arg_type == O_ASSIGN) {
822 arg[1].arg_flags |= AF_ARYOK;
823 arg[2].arg_flags |= AF_ARYOK;
826 else if (arg1->arg_type == O_HSLICE) {
827 arg1->arg_type = O_LHSLICE;
828 if (arg->arg_type == O_ASSIGN) {
830 arg[1].arg_flags |= AF_ARYOK;
831 arg[2].arg_flags |= AF_ARYOK;
834 else if ((arg->arg_type == O_DEFINED || arg->arg_type == O_UNDEF) &&
835 (arg1->arg_type == (perldb ? O_DBSUBR : O_SUBR)) ) {
836 arg[1].arg_type |= A_DONT;
838 else if (arg1->arg_type == O_SUBSTR || arg1->arg_type == O_VEC) {
840 Renewc(arg1->arg_ptr.arg_str, 1, struct lstring, STR);
841 /* grow string struct to hold an lstring struct */
843 else if (arg1->arg_type == O_ASSIGN)
847 (void)sprintf(tokenbuf,
848 "Illegal expression (%s) as lvalue",opname[arg1->arg_type]);
851 arg[1].arg_type = A_LEXPR | (arg[1].arg_type & A_DONT);
852 if (arg->arg_type == O_ASSIGN && (arg1[1].arg_flags & AF_ARYOK)) {
853 arg[1].arg_flags |= AF_ARYOK;
854 if (arg->arg_len > 1)
855 arg[2].arg_flags |= AF_ARYOK;
859 fprintf(stderr,"lval LEXPR\n");
863 if (i == A_STAR || i == A_LSTAR) {
864 arg[1].arg_type = A_LSTAR | (arg[1].arg_type & A_DONT);
868 /* not an array reference, should be a register name */
870 if (i != A_STAB && i != A_LVAL) {
871 (void)sprintf(tokenbuf,
872 "Illegal item (%s) as lvalue",argname[arg[1].arg_type&A_MASK]);
875 arg[1].arg_type = A_LVAL | (arg[1].arg_type & A_DONT);
878 fprintf(stderr,"lval LVAL\n");
888 if (type == O_DEFINED || type == O_UNDEF) {
889 if (arg->arg_type != O_ITEM)
891 if (arg->arg_type == O_ITEM) {
892 type = arg[1].arg_type & A_MASK;
893 if (type == A_EXPR || type == A_LEXPR)
894 arg[1].arg_type = A_LEXPR|A_DONT;
905 if (arg[i].arg_type != A_EXPR) { /* dehoist */
906 tmparg = make_op(O_ITEM,1,Nullarg,Nullarg,Nullarg);
908 arg[i].arg_ptr.arg_arg = tmparg;
909 arg[i].arg_type = A_EXPR;
914 addflags(i,flags,arg)
917 arg[i].arg_flags |= flags;
925 if (arg->arg_type == O_ARRAY || arg->arg_type == O_HASH)
926 return make_op(O_ITEM,1,arg,Nullarg,Nullarg);
930 /* maybe do a join on multiple array dimensions */
936 if (arg && arg->arg_type == O_COMMA) {
938 arg = make_op(O_JOIN, 2,
939 stab2arg(A_STAB,stabent(";",TRUE)),
952 register ARG *nxtnode;
958 arg->arg_type = O_LIST;
960 if (arg->arg_type != O_COMMA) {
961 if (arg->arg_type != O_ARRAY)
962 arg->arg_flags |= AF_LISTISH; /* see listish() below */
963 arg->arg_flags |= AF_LISTISH; /* see listish() below */
966 for (i = 2, node = arg; ; i++) {
967 if (node->arg_len < 2)
969 if (node[1].arg_type != A_EXPR)
971 node = node[1].arg_ptr.arg_arg;
972 if (node->arg_type != O_COMMA)
978 tmpstr = arg->arg_ptr.arg_str;
980 *arg = *node; /* copy everything except the STR */
982 (void)bcopy((char *)node, (char *)arg, sizeof(ARG));
984 arg->arg_ptr.arg_str = tmpstr;
989 (void)bcopy((char *)(node+2), (char *)(arg+j), sizeof(ARG));
991 arg[j].arg_flags |= AF_ARYOK;
992 --j; /* Bug in Xenix compiler */
997 (void)bcopy((char *)(node+1), (char *)(arg+1), sizeof(ARG));
1002 nxtnode = node[1].arg_ptr.arg_arg;
1007 arg[1].arg_flags |= AF_ARYOK;
1008 arg[2].arg_flags |= AF_ARYOK;
1009 arg->arg_type = O_LIST;
1014 /* turn a single item into a list */
1020 if (arg && arg->arg_flags & AF_LISTISH)
1021 arg = make_op(O_LIST,1,arg,Nullarg,Nullarg);
1026 maybelistish(optype, arg)
1032 if (optype == O_RETURN && arg->arg_type == O_ITEM &&
1033 arg[1].arg_type == A_EXPR && (tmparg = arg[1].arg_ptr.arg_arg) &&
1034 ((tmparg->arg_flags & AF_LISTISH) || (tmparg->arg_type == O_ARRAY) )) {
1035 tmparg = listish(tmparg);
1039 else if (optype == O_PRTF ||
1040 (arg->arg_type == O_ASLICE || arg->arg_type == O_HSLICE ||
1041 arg->arg_type == O_F_OR_R) )
1046 /* mark list of local variables */
1052 arg->arg_flags |= AF_LOCAL;
1062 if (arg->arg_type == O_CONCAT && arg[2].arg_type == A_EXPR) {
1063 arg2 = arg[2].arg_ptr.arg_arg;
1064 if (arg2->arg_type == O_ITEM && arg2[1].arg_type == A_READ) {
1065 arg->arg_type = O_RCAT;
1066 arg[2].arg_type = arg2[1].arg_type;
1067 arg[2].arg_ptr = arg2[1].arg_ptr;
1075 stab2arg(atype,stab)
1077 register STAB *stab;
1082 arg->arg_type = O_ITEM;
1083 arg[1].arg_type = atype;
1084 arg[1].arg_ptr.arg_stab = stab;
1090 register char *cval;
1095 arg->arg_type = O_ITEM;
1096 arg[1].arg_type = A_SINGLE;
1097 arg[1].arg_ptr.arg_str = str_make(cval,0);
1108 Newz(203,arg, numargs + 1, ARG);
1109 arg->arg_ptr.arg_str = Str_new(21,0);
1110 arg->arg_len = numargs;
1118 str_free(arg->arg_ptr.arg_str);
1123 make_match(type,expr,spat)
1130 arg = make_op(type,2,expr,Nullarg,Nullarg);
1132 arg[2].arg_type = A_SPAT|A_DONT;
1133 arg[2].arg_ptr.arg_spat = spat;
1136 fprintf(stderr,"make_match SPAT=%lx\n",(long)spat);
1139 if (type == O_SUBST || type == O_NSUBST) {
1140 if (arg[1].arg_type != A_STAB) {
1141 yyerror("Illegal lvalue");
1143 arg[1].arg_type = A_LVAL;
1155 arg->arg_type = O_ITEM;
1156 arg[1].arg_type = A_CMD;
1157 arg[1].arg_ptr.arg_cmd = cmd;
1161 /* Check two expressions to see if there is any identifier in common */
1164 nothing_in_common(arg1,arg2)
1168 static int thisexpr = 0; /* I don't care if this wraps */
1171 if (arg_common(arg1,thisexpr,1))
1172 return 0; /* hit eval or do {} */
1173 stab_lastexpr(defstab) = thisexpr; /* pretend to hit @_ */
1174 if (arg_common(arg2,thisexpr,0))
1175 return 0; /* hit identifier again */
1179 /* Recursively descend an expression and mark any identifier or check
1180 * it to see if it was marked already.
1184 arg_common(arg,exprnum,marking)
1193 for (i = arg->arg_len; i >= 1; i--) {
1194 switch (arg[i].arg_type & A_MASK) {
1199 if (arg_common(arg[i].arg_ptr.arg_arg,exprnum,marking))
1203 return 1; /* assume hanky panky */
1211 stab_lastexpr(arg[i].arg_ptr.arg_stab) = exprnum;
1212 else if (stab_lastexpr(arg[i].arg_ptr.arg_stab) == exprnum)
1218 register char *s = arg[i].arg_ptr.arg_str->str_ptr;
1219 register char *send = s + arg[i].arg_ptr.arg_str->str_cur;
1220 register STAB *stab;
1223 if (*s == '$' && s[1]) {
1224 s = scanident(s,send,tokenbuf);
1225 stab = stabent(tokenbuf,TRUE);
1227 stab_lastexpr(stab) = exprnum;
1228 else if (stab_lastexpr(stab) == exprnum)
1232 else if (*s == '\\' && s[1])
1239 if (spat_common(arg[i].arg_ptr.arg_spat,exprnum,marking))
1250 switch (arg->arg_type) {
1253 if ((arg[1].arg_type & A_MASK) == A_STAB)
1254 (void)aadd(arg[1].arg_ptr.arg_stab);
1258 if ((arg[1].arg_type & A_MASK) == A_STAB)
1259 (void)hadd(arg[1].arg_ptr.arg_stab);
1270 spat_common(spat,exprnum,marking)
1271 register SPAT *spat;
1275 if (spat->spat_runtime)
1276 if (arg_common(spat->spat_runtime,exprnum,marking))
1278 if (spat->spat_repl) {
1279 if (arg_common(spat->spat_repl,exprnum,marking))