1 /* $RCSfile: walk.c,v $$Revision: 4.0.1.1 $$Date: 91/06/07 12:22:04 $
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 4.0.1.1 91/06/07 12:22:04 lwall
10 * patch4: new copyright notice
11 * patch4: a2p didn't correctly implement -n switch
13 * Revision 4.0 91/03/20 01:58:36 lwall
24 bool realexit = FALSE;
25 bool saw_getline = FALSE;
26 bool subretnum = FALSE;
28 bool saw_argv0 = FALSE;
34 STR *curargs = Nullstr;
37 walk(useval,level,node,numericptr,minprec)
42 int minprec; /* minimum precedence without parens */
56 int prec = P_MAX; /* assume no parens needed */
63 type = ops[node].ival;
70 while (isalpha(*namelist)) {
71 for (d = tokenbuf,s=namelist;
72 isalpha(*s) || isdigit(*s) || *s == '_';
75 while (*s && !isalpha(*s)) s++;
77 nameary[++arymax] = savestr(tokenbuf);
84 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
85 if (do_split && need_entire && !absmaxfld)
86 split_to_array = TRUE;
87 if (do_split && split_to_array)
88 set_array_base = TRUE;
90 str_cat(str,"$[ = 1;\t\t\t# set array base to 1\n");
92 if (fswitch && !const_FS)
94 if (saw_FS > 1 || saw_RS)
96 if (saw_ORS && need_entire)
99 str_cat(str,"$FS = '");
100 if (index("*+?.[]()|^$\\",fswitch))
102 sprintf(tokenbuf,"%c",fswitch);
103 str_cat(str,tokenbuf);
104 str_cat(str,"';\t\t# field separator from -F switch\n");
106 else if (saw_FS && !const_FS) {
107 str_cat(str,"$FS = ' ';\t\t# set field separator\n");
110 str_cat(str,"$, = ' ';\t\t# set output field separator\n");
113 str_cat(str,"$\\ = \"\\n\";\t\t# set output record separator\n");
116 str_cat(str,"$ARGV0 = $0;\t\t# remember what we ran as\n");
118 if (str->str_cur > 20)
120 if (ops[node+2].ival) {
121 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
125 fstr = walk(0,level+1,ops[node+3].ival,&numarg,P_MIN);
126 if (*fstr->str_ptr) {
128 str_cat(str,"line: ");
129 str_cat(str,"while (<>) {\n");
131 if (saw_FS && !const_FS)
134 str_cat(str,"chop;\t# strip record separator\n");
138 emit_split(str,level);
144 str_cat(str,"continue {\n $FNRbase = $. if eof;\n}\n");
147 str_cat(str,"while (<>) { } # (no line actions)\n");
148 if (ops[node+4].ival) {
152 str_scat(str,fstr=walk(0,level,ops[node+4].ival,&numarg,P_MIN));
157 str_cat(str,"exit $ExitValue;\n");
163 for (len = 0; len < 4; len++) {
164 if (saw_getline & (1 << len)) {
165 sprintf(tokenbuf,"\nsub Getline%d {\n",len);
166 str_cat(str, tokenbuf);
169 str_cat(str," &Pick('',@_);\n");
171 str_cat(str," ($fh) = @_;\n");
175 str_cat(str," $FNRbase = $. if eof;\n");
178 str_cat(str," local($_);\n");
181 " if ($getline_ok = (($_ = <$fh>) ne ''))");
184 " if ($getline_ok = (($_ = <>) ne ''))");
185 str_cat(str, " {\n");
191 str_cat(str,"chop;\t# strip record separator\n");
194 if (do_split && !(len & 1)) {
196 emit_split(str,level);
201 str_cat(str,"}\n $_;\n}\n");
206 if (do_fancy_opens) {
209 local($mode,$name,$pipe) = @_;\n\
210 $fh = $opened{$name};\n\
212 $fh = $opened{$name} = 'fh_' . ($nextfh++ + 0);\n\
213 open($fh,$mode.$name.$pipe);\n\
220 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
221 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
224 str_scat(str,fstr=walk(0,level,ops[node+3].ival,&numarg,P_MIN));
232 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
234 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
242 tmpstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN);
243 /* translate \nnn to [\nnn] */
244 for (s = tmpstr->str_ptr, d = tokenbuf; *s; s++, d++) {
245 if (*s == '\\' && isdigit(s[1]) && isdigit(s[2]) && isdigit(s[3])){
257 for (d=tokenbuf; *d; d++)
259 str_cat(str,tokenbuf);
266 str = walk(0,level,oper1(OPRINT,0),&numarg,P_MIN);
268 str_scat(str,fstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN));
273 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
274 if (*tmpstr->str_ptr) {
277 str_scat(str,tmpstr);
278 str_cat(str,") {\n");
280 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
287 str = walk(0,level,ops[node+2].ival,&numarg,P_MIN);
294 str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
300 str = walk(1,level,ops[node+1].ival,&numarg,prec);
302 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
304 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
309 str = walk(1,level,ops[node+1].ival,&numarg,prec);
311 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
313 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
320 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
325 str = walk(1,level,ops[node+1].ival,&numarg,prec);
327 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
330 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
336 str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
343 str = walk(1,level,ops[node+1].ival,&numarg,prec);
346 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
348 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
353 str = walk(1,level,ops[node+1].ival,&numarg,prec);
356 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
358 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
365 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
371 str = walk(1,level,ops[node+2].ival,&numarg,prec+1);
373 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
374 tmp2str = walk(1,level,ops[node+3].ival,&numarg,prec+1);
377 (!numarg && (*tmp2str->str_ptr == '"' || *tmp2str->str_ptr == '\''))) {
380 str_set(tmpstr,"eq");
381 else if (strEQ(t,"!="))
382 str_set(tmpstr,"ne");
383 else if (strEQ(t,"<"))
384 str_set(tmpstr,"lt");
385 else if (strEQ(t,"<="))
386 str_set(tmpstr,"le");
387 else if (strEQ(t,">"))
388 str_set(tmpstr,"gt");
389 else if (strEQ(t,">="))
390 str_set(tmpstr,"ge");
391 if (!index(tmpstr->str_ptr,'\'') && !index(tmpstr->str_ptr,'"') &&
392 !index(tmp2str->str_ptr,'\'') && !index(tmp2str->str_ptr,'"') )
396 if (numeric & 1) /* numeric is very good guess */
404 str_scat(str,tmpstr);
407 str_scat(str,tmp2str);
414 str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
421 str = walk(1,level,ops[node+2].ival,&numarg,prec+1);
423 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
424 if (strEQ(tmpstr->str_ptr,"~"))
427 str_scat(str,tmpstr);
431 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
439 fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
446 type = ops[ops[node+1].ival].ival & 255;
447 str = walk(1,level,ops[node+1].ival,&numarg,prec+(type != OCONCAT));
449 type = ops[ops[node+2].ival].ival & 255;
451 fstr=walk(1,level,ops[node+2].ival,&numarg,prec+(type != OCONCAT)));
456 str = walk(0,level,ops[node+2].ival,&numarg,prec+1);
458 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
459 str_scat(str,tmpstr);
460 if (str_len(tmpstr) > 1)
464 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec));
470 str = walk(1,level,ops[node+1].ival,&numarg,prec);
472 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
478 str = walk(1,level,ops[node+1].ival,&numarg,prec);
480 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
486 str = walk(1,level,ops[node+1].ival,&numarg,prec);
488 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
494 str = walk(1,level,ops[node+1].ival,&numarg,prec);
496 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
502 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
504 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec));
510 str = walk(1,level,ops[node+1].ival,&numarg,prec);
512 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
518 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
524 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
532 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
540 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
548 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
559 fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
570 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
571 if (!*fstr->str_ptr) {
573 len = 2; /* a legal fiction */
580 tmpstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN);
581 fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
582 if (!do_fancy_opens) {
584 if (*t == '"' || *t == '\'')
585 t = cpytill(tokenbuf,t+1,*t);
587 fatal("Internal error: OGETLINE %s", t);
589 s = savestr(tokenbuf);
590 for (t = tokenbuf; *t; t++) {
594 if (!isalpha(*t) && !isdigit(*t))
597 if (!index(tokenbuf,'_'))
599 tmp3str = hfetch(symtab,tokenbuf);
602 str_cat(opens,"open(");
603 str_cat(opens,tokenbuf);
607 str_cat(opens,tmpstr->str_ptr+1);
609 if (*fstr->str_ptr == '|')
612 if (*fstr->str_ptr == '|')
613 str_cat(opens,") || die 'Cannot pipe from \"");
615 str_cat(opens,") || die 'Cannot open file \"");
617 str_cat(opens,"'.\"");
620 str_cat(opens,"\".'");
621 str_cat(opens,"\".';\n");
622 hstore(symtab,tokenbuf,str_make("x"));
627 str_cat(tmpstr,tokenbuf);
630 if (*fstr->str_ptr == '|')
631 str_cat(tmpstr,", '|'");
635 tmpstr = str_make("");
636 sprintf(tokenbuf," = &Getline%d(%s)",len,tmpstr->str_ptr);
637 str_cat(str,tokenbuf);
640 str_cat(str,",$getline_ok)");
641 saw_getline |= 1 << len;
645 str_set(str,"sprintf(");
646 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
652 str_set(str,"substr(");
653 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
656 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_COMMA+1));
660 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_COMMA+1));
664 str_cat(str,"999999");
669 str_set(str,ops[node+1].cval);
674 tmpstr = walk(1,level,ops[node+2].ival,&numarg,P_MIN);
679 str_scat(str,tmpstr);
680 str_cat(str," = split(");
682 fstr = walk(1,level,ops[node+3].ival,&numarg,P_COMMA+1);
683 if (str_len(fstr) == 3 && *fstr->str_ptr == '\'') {
684 i = fstr->str_ptr[1] & 127;
685 if (index("*+?.[]()|^$\\",i))
686 sprintf(tokenbuf,"/\\%c/",i);
688 sprintf(tokenbuf,"' '");
690 sprintf(tokenbuf,"/%c/",i);
691 str_cat(str,tokenbuf);
698 sprintf(tokenbuf,"/[%c\\n]/",const_FS);
699 str_cat(str,tokenbuf);
706 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
708 str_cat(str,", 9999)");
716 str_set(str,"index(");
717 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
720 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_COMMA+1));
728 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MATCH+1));
731 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MATCH+1));
733 str_cat(str," && ($RLENGTH = length($&), $RSTART = length($`)+1)");
739 fstr=walk(1,level-1,ops[node+2].ival,&numarg,P_MIN);
740 curargs = str_new(0);
741 str_sset(curargs,fstr);
742 str_cat(curargs,",");
743 tmp2str=walk(1,level,ops[node+5].ival,&numarg,P_MIN);
749 t = tmp2str->str_ptr;
750 while (t = instr(t,"return "))
754 for (t = s+7; *t; t++) {
755 if (*t == ';' || *t == '}')
760 tmp2str->str_cur -= 7;
766 str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
770 str_cat(str,"local(");
772 str_cat(str,") = @_;");
775 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN));
778 str_scat(str,fstr=walk(1,level,ops[node+4].ival,&numarg,P_MIN));
781 str_scat(str,tmp2str);
789 tmp2str = str_new(0);
791 str_set(tmp2str,"1");
792 hstore(symtab,tmpstr->str_ptr,tmp2str);
799 str_cat(str,"return ");
800 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_UNI+1));
806 str_cat(str,"return");
811 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
814 tmpstr = hfetch(symtab,str->str_ptr+3);
815 if (tmpstr && tmpstr->str_ptr)
816 numeric |= atoi(tmpstr->str_ptr);
817 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
831 tmpstr = walk(1,level,ops[node+3].ival,&numarg,P_MATCH+1);
832 if (strNE(tmpstr->str_ptr,"$_")) {
833 str_cat(tmpstr, " =~ s");
837 str_set(tmpstr, "s");
840 str_set(tmpstr, "s");
841 type = ops[ops[node+2].ival].ival;
844 tmp3str = str_new(0);
846 tmp2str=walk(1,level,ops[ops[node+2].ival+1].ival,&numarg,P_MIN);
847 for (t = tmp2str->str_ptr, d=tokenbuf; *t; d++,t++) {
855 str_set(tmp2str,tokenbuf);
858 tmp2str=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
859 str_set(tmp3str,"($s_ = '\"'.(");
860 str_scat(tmp3str,tmp2str);
861 str_cat(tmp3str,").'\"') =~ s/&/\\$&/g, ");
862 str_set(tmp2str,"eval $s_");
863 s = (*s == 'g' ? "ge" : "e");
866 type = ops[ops[node+1].ival].ival;
869 fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN);
870 if (type == OREGEX) {
873 str_scat(str,tmp3str);
874 str_scat(str,tmpstr);
876 str_scat(str,tmp2str);
880 else if ((type == OFLD && !split_to_array) || (type == OVAR && len == 1)) {
883 str_scat(str,tmp3str);
884 str_scat(str,tmpstr);
888 str_scat(str,tmp2str);
896 str_cat(str,"$s = ");
899 str_scat(str,tmp3str);
900 str_scat(str,tmpstr);
902 str_scat(str,tmp2str);
915 str = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
919 tmpstr = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
921 for (t = tmpstr->str_ptr, d=tokenbuf; *t; d++,t++) {
924 else if (*t == '\\') {
928 case '\\': case '"': case 'n': case 't': case '$':
930 default: /* hide this from perl */
939 str_cat(str,tokenbuf);
946 str_set(str,"defined $");
950 str_set(str,"delete $");
960 str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
962 tmp2str = hfetch(symtab,tmpstr->str_ptr);
963 if (tmp2str && atoi(tmp2str->str_ptr))
965 if (strEQ(str->str_ptr,"$FNR")) {
968 str_set(str,"($.-$FNRbase)");
970 else if (strEQ(str->str_ptr,"$NR")) {
974 else if (strEQ(str->str_ptr,"$NF")) {
976 str_set(str,"$#Fld");
978 else if (strEQ(str->str_ptr,"$0"))
980 else if (strEQ(str->str_ptr,"$ARGC"))
981 str_set(str,"($#ARGV+1)");
986 sprintf(tokenbuf,"$%s,",tmpstr->str_ptr);
987 ??? if (instr(curargs->str_ptr,tokenbuf))
988 str_cat(str,"\377"); /* can't translate yet */
991 str_cat(tmpstr,"[]");
992 tmp2str = hfetch(symtab,tmpstr->str_ptr);
993 if (tmp2str && atoi(tmp2str->str_ptr))
997 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
999 if (strEQ(str->str_ptr,"$ARGV[0")) {
1000 str_set(str,"$ARGV0");
1004 if (tmp2str && atoi(tmp2str->str_ptr))
1005 strcpy(tokenbuf,"]");
1007 strcpy(tokenbuf,"}");
1009 str_cat(str,tokenbuf);
1016 if (split_to_array) {
1017 str_set(str,"$Fld");
1019 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1024 i = atoi(walk(1,level,ops[node+1].ival,&numarg,P_MIN)->str_ptr);
1026 sprintf(tokenbuf,"$%s",nameary[i]);
1028 sprintf(tokenbuf,"$Fld%d",i);
1029 str_set(str,tokenbuf);
1034 str_set(str,"$Fld[");
1035 i = ops[node+1].ival;
1036 if ((ops[i].ival & 255) == OPAREN)
1038 tmpstr=walk(1,level,i,&numarg,P_MIN);
1039 str_scat(str,tmpstr);
1058 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1059 for (s = tmpstr->str_ptr; *s && *s != '\n'; s++)
1061 str_scat(str,tmpstr);
1067 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1068 for (s = tmpstr->str_ptr; *s && *s != '\n'; s++)
1070 str_scat(str,tmpstr);
1076 str = walk(1,level,ops[node+1].ival,&numarg,prec);
1078 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
1080 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
1089 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1090 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1096 str_scat(str,fstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN));
1099 tmpstr = walk(0,level,ops[node+2].ival,&numarg,P_MIN);
1100 if (*tmpstr->str_ptr == ';') {
1102 str_cat(str,tmpstr->str_ptr+1);
1109 str = str_make("close(");
1110 tmpstr = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
1111 if (!do_fancy_opens) {
1112 t = tmpstr->str_ptr;
1113 if (*t == '"' || *t == '\'')
1114 t = cpytill(tokenbuf,t+1,*t);
1116 fatal("Internal error: OCLOSE %s",t);
1117 s = savestr(tokenbuf);
1118 for (t = tokenbuf; *t; t++) {
1122 if (!isalpha(*t) && !isdigit(*t))
1125 if (!index(tokenbuf,'_'))
1129 str_set(str,"close ");
1130 str_cat(str,tokenbuf);
1133 sprintf(tokenbuf,"$fh = delete $opened{%s} && close($fh)",
1136 str_set(str,tokenbuf);
1141 lparen = ""; /* set to parens if necessary */
1144 if (len == 3) { /* output redirection */
1145 tmpstr = walk(1,level,ops[node+3].ival,&numarg,P_MIN);
1146 tmp2str = walk(1,level,ops[node+2].ival,&numarg,P_MIN);
1147 if (!do_fancy_opens) {
1148 t = tmpstr->str_ptr;
1149 if (*t == '"' || *t == '\'')
1150 t = cpytill(tokenbuf,t+1,*t);
1152 fatal("Internal error: OPRINT");
1154 s = savestr(tokenbuf);
1155 for (t = tokenbuf; *t; t++) {
1159 if (!isalpha(*t) && !isdigit(*t))
1162 if (!index(tokenbuf,'_'))
1164 tmp3str = hfetch(symtab,tokenbuf);
1166 str_cat(opens,"open(");
1167 str_cat(opens,tokenbuf);
1168 str_cat(opens,", ");
1171 str_scat(opens,tmp2str);
1172 str_cat(opens,tmpstr->str_ptr+1);
1173 if (*tmp2str->str_ptr == '|')
1174 str_cat(opens,") || die 'Cannot pipe to \"");
1176 str_cat(opens,") || die 'Cannot create file \"");
1178 str_cat(opens,"'.\"");
1181 str_cat(opens,"\".'");
1182 str_cat(opens,"\".';\n");
1183 hstore(symtab,tokenbuf,str_make("x"));
1191 sprintf(tokenbuf,"&Pick('%s', %s) &&\n",
1192 tmp2str->str_ptr, tmpstr->str_ptr);
1193 str_cat(str,tokenbuf);
1195 strcpy(tokenbuf,"$fh");
1203 strcpy(tokenbuf,"");
1204 str_cat(str,lparen); /* may be null */
1205 if (type == OPRINTF)
1206 str_cat(str,"printf");
1208 str_cat(str,"print");
1210 if (len == 3 || do_fancy_opens) {
1215 str_cat(str,tokenbuf);
1217 tmpstr = walk(1+(type==OPRINT),level,ops[node+1].ival,&numarg,P_MIN);
1218 if (!*tmpstr->str_ptr && lval_field) {
1219 t = saw_OFS ? "$," : "' '";
1220 if (split_to_array) {
1221 sprintf(tokenbuf,"join(%s,@Fld)",t);
1222 str_cat(tmpstr,tokenbuf);
1225 for (i = 1; i < maxfld; i++) {
1227 sprintf(tokenbuf,"$%s, ",nameary[i]);
1229 sprintf(tokenbuf,"$Fld%d, ",i);
1230 str_cat(tmpstr,tokenbuf);
1232 if (maxfld <= arymax)
1233 sprintf(tokenbuf,"$%s",nameary[maxfld]);
1235 sprintf(tokenbuf,"$Fld%d",maxfld);
1236 str_cat(tmpstr,tokenbuf);
1239 if (*tmpstr->str_ptr) {
1241 if (!saw_fh && *tmpstr->str_ptr == '(') {
1243 str_scat(str,tmpstr);
1247 str_scat(str,tmpstr);
1252 str_cat(str,rparen); /* may be null */
1256 str = str_make("rand(1)");
1259 str = str_make("srand(");
1262 str = str_make("atan2(");
1265 str = str_make("sin(");
1268 str = str_make("cos(");
1271 str = str_make("system(");
1274 str = str_make("length(");
1277 str = str_make("log(");
1280 str = str_make("exp(");
1283 str = str_make("sqrt(");
1286 str = str_make("int(");
1290 tmpstr = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
1292 tmpstr = str_new(0);;
1293 if (!tmpstr->str_ptr || !*tmpstr->str_ptr) {
1295 t = saw_OFS ? "$," : "' '";
1296 if (split_to_array) {
1297 sprintf(tokenbuf,"join(%s,@Fld)",t);
1298 str_cat(tmpstr,tokenbuf);
1301 sprintf(tokenbuf,"join(%s, ",t);
1302 str_cat(tmpstr,tokenbuf);
1303 for (i = 1; i < maxfld; i++) {
1305 sprintf(tokenbuf,"$%s,",nameary[i]);
1307 sprintf(tokenbuf,"$Fld%d,",i);
1308 str_cat(tmpstr,tokenbuf);
1310 if (maxfld <= arymax)
1311 sprintf(tokenbuf,"$%s)",nameary[maxfld]);
1313 sprintf(tokenbuf,"$Fld%d)",maxfld);
1314 str_cat(tmpstr,tokenbuf);
1318 str_cat(tmpstr,"$_");
1320 if (strEQ(tmpstr->str_ptr,"$_")) {
1321 if (type == OLENGTH && !do_chop) {
1322 str = str_make("(length(");
1323 str_cat(tmpstr,") - 1");
1326 str_scat(str,tmpstr);
1332 str_set(str,"last");
1336 str_set(str,"next line");
1342 str_set(str,"exit");
1347 fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
1353 str_set(str,"$ExitValue = ");
1356 fstr=walk(1,level,ops[node+1].ival,&numarg,P_ASSIGN));
1360 str_cat(str,"last line");
1365 str_set(str,"next");
1371 str_set(str,"if (");
1372 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1375 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1378 i = ops[node+3].ival;
1380 if ((ops[i].ival & 255) == OBLOCK) {
1383 if ((ops[i].ival & 255) != OIF)
1392 str_scat(str,fstr=walk(0,level,i,&numarg,P_MIN));
1396 str_cat(str,"else ");
1397 str_scat(str,fstr=walk(0,level,ops[node+3].ival,&numarg,P_MIN));
1404 str_set(str,"while (");
1405 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1408 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1413 str_set(str,"for (");
1414 str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1417 t = s = tmpstr->str_ptr;
1418 while (isalpha(*t) || isdigit(*t) || *t == '$' || *t == '_')
1425 fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
1426 if (i && (t = index(fstr->str_ptr,0377))) {
1427 if (strnEQ(fstr->str_ptr,s,i))
1434 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN));
1437 str_scat(str,fstr=walk(0,level,ops[node+4].ival,&numarg,P_MIN));
1441 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1442 d = index(tmpstr->str_ptr,'$');
1444 fatal("Illegal for loop: %s",tmpstr->str_ptr);
1449 fatal("Illegal for loop: %s",d);
1451 for (t = s; i = *t; t++) {
1453 if (i == '}' || i == ']')
1461 tmp2str = hfetch(symtab,str->str_ptr);
1462 if (tmp2str && atoi(tmp2str->str_ptr)) {
1464 "foreach %s ($[ .. $#%s) ",
1470 "foreach %s (keys %%%s) ",
1474 str_set(str,tokenbuf);
1475 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1482 if (len >= 2 && ops[node+2].ival) {
1483 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1486 fixtab(str,++level);
1487 str_scat(str,fstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN));
1490 fixtab(str,--level);
1494 str_scat(str,fstr=walk(0,level,ops[node+3].ival,&numarg,P_MIN));
1502 fatal("Garbage length in walk");
1503 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1504 for (i = 2; i<= len; i++) {
1505 str_scat(str,fstr=walk(0,level,ops[node+i].ival,&numarg,P_MIN));
1517 if (useval && prec < minprec) { /* need parens? */
1518 fstr = str_new(str->str_cur+2);
1519 str_nset(fstr,"(",1);
1521 str_ncat(fstr,")",1);
1526 *numericptr = numeric;
1529 printf("%3d %5d %15s %d %4d ",level,node,opname[type],len,str->str_cur);
1530 for (t = str->str_ptr; *t && t - str->str_ptr < 40; t++)
1533 else if (*t == '\t')
1561 /* strip trailing white space */
1563 s = str->str_ptr+str->str_cur - 1;
1564 while (s >= str->str_ptr && (*s == ' ' || *s == '\t' || *s == '\n'))
1567 str->str_cur = s + 1 - str->str_ptr;
1568 if (s >= str->str_ptr && *s != '\n')
1579 s = str->str_ptr+str->str_cur - 1;
1580 while (s >= str->str_ptr && (*s == ' ' || *s == '\t' || *s == '\n'))
1582 if (s >= str->str_ptr && *s != ';' && *s != '}')
1586 emit_split(str,level)
1593 str_cat(str,"@Fld");
1596 for (i = 1; i < maxfld; i++) {
1598 sprintf(tokenbuf,"$%s,",nameary[i]);
1600 sprintf(tokenbuf,"$Fld%d,",i);
1601 str_cat(str,tokenbuf);
1603 if (maxfld <= arymax)
1604 sprintf(tokenbuf,"$%s)",nameary[maxfld]);
1606 sprintf(tokenbuf,"$Fld%d)",maxfld);
1607 str_cat(str,tokenbuf);
1610 sprintf(tokenbuf," = split(/[%c\\n]/, $_, 9999);\n",const_FS);
1611 str_cat(str,tokenbuf);
1614 str_cat(str," = split($FS, $_, 9999);\n");
1616 str_cat(str," = split(' ', $_, 9999);\n");
1620 prewalk(numit,level,node,numericptr)
1632 int numeric = FALSE;
1640 type = ops[node].ival;
1645 prewalk(0,level,ops[node+1].ival,&numarg);
1646 if (ops[node+2].ival) {
1647 prewalk(0,level,ops[node+2].ival,&numarg);
1650 prewalk(0,level,ops[node+3].ival,&numarg);
1652 if (ops[node+3].ival) {
1653 prewalk(0,level,ops[node+4].ival,&numarg);
1657 prewalk(0,level,ops[node+1].ival,&numarg);
1658 prewalk(0,level,ops[node+2].ival,&numarg);
1660 prewalk(0,level,ops[node+3].ival,&numarg);
1664 prewalk(1,level,ops[node+1].ival,&numarg);
1665 prewalk(1,level,ops[node+2].ival,&numarg);
1670 prewalk(0,level,ops[node+1].ival,&numarg);
1674 prewalk(0,level,ops[node+1].ival,&numarg);
1677 i = prewalk(0,level,ops[node+1].ival,&numarg);
1680 prewalk(0,level,ops[node+2].ival,&numarg);
1684 prewalk(0,level,ops[node+2].ival,&numarg);
1689 prewalk(0,level,ops[node+1].ival,&numarg);
1692 prewalk(0,level,ops[node+1].ival,&numarg);
1693 prewalk(0,level,ops[node+2].ival,&numarg);
1696 prewalk(0,level,ops[node+1].ival,&numarg);
1697 prewalk(0,level,ops[node+2].ival,&numarg);
1700 prewalk(0,level,ops[node+1].ival,&numarg);
1703 prewalk(0,level,ops[node+1].ival,&numarg);
1707 prewalk(0,level,ops[node+1].ival,&numarg);
1709 prewalk(0,level,ops[node+2].ival,&numarg);
1712 prewalk(0,level,ops[node+1].ival,&numarg);
1714 prewalk(0,level,ops[node+2].ival,&numarg);
1717 prewalk(0,level,ops[node+1].ival,&numarg);
1721 prewalk(0,level,ops[node+2].ival,&numarg);
1723 prewalk(0,level,ops[node+1].ival,&numarg);
1724 prewalk(0,level,ops[node+3].ival,&numarg);
1729 prewalk(0,level,ops[node+1].ival,&numarg);
1733 prewalk(0,level,ops[node+2].ival,&numarg);
1734 prewalk(0,level,ops[node+1].ival,&numarg);
1735 prewalk(0,level,ops[node+3].ival,&numarg);
1739 prewalk(0,level,ops[node+1].ival,&numarg);
1743 prewalk(0,level,ops[node+1].ival,&numarg);
1744 prewalk(0,level,ops[node+2].ival,&numarg);
1747 prewalk(0,level,ops[node+2].ival,&numarg);
1748 prewalk(0,level,ops[node+1].ival,&numarg);
1749 prewalk(0,level,ops[node+3].ival,&numarg);
1750 if (numarg || strlen(ops[ops[node+1].ival+1].cval) > 1) {
1751 numericize(ops[node+2].ival);
1753 numericize(ops[node+3].ival);
1758 prewalk(1,level,ops[node+1].ival,&numarg);
1759 prewalk(1,level,ops[node+2].ival,&numarg);
1763 prewalk(1,level,ops[node+1].ival,&numarg);
1764 prewalk(1,level,ops[node+2].ival,&numarg);
1768 prewalk(1,level,ops[node+1].ival,&numarg);
1769 prewalk(1,level,ops[node+2].ival,&numarg);
1773 prewalk(1,level,ops[node+1].ival,&numarg);
1774 prewalk(1,level,ops[node+2].ival,&numarg);
1778 prewalk(1,level,ops[node+1].ival,&numarg);
1779 prewalk(1,level,ops[node+2].ival,&numarg);
1783 prewalk(1,level,ops[node+1].ival,&numarg);
1784 prewalk(1,level,ops[node+2].ival,&numarg);
1788 prewalk(1,level,ops[node+1].ival,&numarg);
1792 prewalk(1,level,ops[node+1].ival,&numarg);
1796 prewalk(1,level,ops[node+1].ival,&numarg);
1800 prewalk(1,level,ops[node+1].ival,&numarg);
1804 prewalk(1,level,ops[node+1].ival,&numarg);
1808 prewalk(1,level,ops[node+1].ival,&numarg);
1812 prewalk(0,level,ops[node+1].ival,&numarg);
1818 prewalk(0,level,ops[node+1].ival,&numarg);
1821 prewalk(0,level,ops[node+1].ival,&numarg);
1822 prewalk(1,level,ops[node+2].ival,&numarg);
1824 prewalk(1,level,ops[node+3].ival,&numarg);
1831 prewalk(0,level,ops[node+2].ival,&numarg);
1833 prewalk(0,level,ops[node+3].ival,&numarg);
1834 prewalk(0,level,ops[node+1].ival,&numarg);
1837 prewalk(0,level,ops[node+1].ival,&numarg);
1838 prewalk(0,level,ops[node+2].ival,&numarg);
1842 prewalk(0,level,ops[node+1].ival,&numarg);
1843 prewalk(0,level,ops[node+2].ival,&numarg);
1849 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1851 prewalk(0,level,ops[node+2].ival,&numarg);
1852 prewalk(0,level,ops[node+4].ival,&numarg);
1853 prewalk(0,level,ops[node+5].ival,&numarg);
1855 str_cat(tmpstr,"(");
1856 tmp2str = str_new(0);
1857 if (subretnum || numarg)
1858 str_set(tmp2str,"1");
1859 hstore(symtab,tmpstr->str_ptr,tmp2str);
1865 prewalk(0,level,ops[node+1].ival,&numarg);
1871 tmp2str = str_new(0);
1872 str_scat(tmp2str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1873 fixrargs(tmpstr->str_ptr,ops[node+2].ival,0);
1875 str_cat(tmp2str,"(");
1876 tmpstr = hfetch(symtab,tmp2str->str_ptr);
1877 if (tmpstr && tmpstr->str_ptr)
1878 numeric |= atoi(tmpstr->str_ptr);
1879 prewalk(0,level,ops[node+2].ival,&numarg);
1885 prewalk(0,level,ops[node+3].ival,&numarg);
1886 prewalk(0,level,ops[ops[node+2].ival+1].ival,&numarg);
1887 prewalk(0,level,ops[node+1].ival,&numarg);
1891 prewalk(0,level,ops[node+1].ival,&numarg);
1895 prewalk(0,level,ops[node+1].ival,&numarg);
1901 prewalk(0,level,ops[node+1].ival,&numarg);
1907 prewalk(0,level,ops[node+2].ival,&numarg);
1911 prewalk(0,level,ops[node+1].ival,&numarg);
1914 i = ops[node+1].ival;
1915 prewalk(0,level,i,&numarg);
1928 prewalk(0,level,ops[node+1].ival,&numarg);
1929 prewalk(0,level,ops[node+2].ival,&numarg);
1930 prewalk(0,level,ops[node+3].ival,&numarg);
1935 prewalk(0,level,ops[node+1].ival,&numarg);
1936 prewalk(0,level,ops[node+2].ival,&numarg);
1940 prewalk(0,level,ops[node+1].ival,&numarg);
1942 prewalk(0,level,ops[node+2].ival,&numarg);
1947 prewalk(0,level,ops[node+1].ival,&numarg);
1951 if (len == 3) { /* output redirection */
1952 prewalk(0,level,ops[node+3].ival,&numarg);
1953 prewalk(0,level,ops[node+2].ival,&numarg);
1955 prewalk(0+(type==OPRINT),level,ops[node+1].ival,&numarg);
1981 prewalk(type != OLENGTH && type != OSYSTEM,
1982 level,ops[node+1].ival,&numarg);
1990 prewalk(1,level,ops[node+1].ival,&numarg);
1998 prewalk(0,level,ops[node+1].ival,&numarg);
1999 prewalk(0,level,ops[node+2].ival,&numarg);
2001 prewalk(0,level,ops[node+3].ival,&numarg);
2005 prewalk(0,level,ops[node+1].ival,&numarg);
2006 prewalk(0,level,ops[node+2].ival,&numarg);
2009 prewalk(0,level,ops[node+1].ival,&numarg);
2010 prewalk(0,level,ops[node+2].ival,&numarg);
2011 prewalk(0,level,ops[node+3].ival,&numarg);
2012 prewalk(0,level,ops[node+4].ival,&numarg);
2015 prewalk(0,level,ops[node+2].ival,&numarg);
2016 prewalk(0,level,ops[node+1].ival,&numarg);
2020 prewalk(0,level,ops[node+2].ival,&numarg);
2023 prewalk(0,level,ops[node+1].ival,&numarg);
2030 fatal("Garbage length in prewalk");
2031 prewalk(0,level,ops[node+1].ival,&numarg);
2032 for (i = 2; i<= len; i++) {
2033 prewalk(0,level,ops[node+i].ival,&numarg);
2038 *numericptr = numeric;
2052 type = ops[node].ival;
2055 if (type == OVAR && len == 1) {
2056 tmpstr=walk(0,0,ops[node+1].ival,&numarg,P_MIN);
2057 tmp2str = str_make("1");
2058 hstore(symtab,tmpstr->str_ptr,tmp2str);