1 /* $RCSfile: walk.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:31 $
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.
17 static void addsemi();
18 static void emit_split();
19 static void numericize();
22 bool realexit = FALSE;
23 bool saw_getline = FALSE;
24 bool subretnum = FALSE;
26 bool saw_argv0 = FALSE;
33 STR *curargs = Nullstr;
35 void addsemi _(( STR *str ));
36 void emit_split _(( STR *str, int level ));
37 void fixtab _(( STR *str, int lvl ));
38 void numericize _(( int node ));
39 int prewalk _(( int numit, int level, int node, int *numericptr ));
40 void tab _(( STR *str, int lvl ));
41 STR * walk _(( int useval, int level, int node, int *numericptr, int minprec ));
45 walk(useval,level,node,numericptr,minprec)
50 int minprec; /* minimum precedence without parens */
64 int prec = P_MAX; /* assume no parens needed */
70 type = ops[node].ival;
77 while (isalpha(*namelist)) {
78 for (d = tokenbuf,s=namelist;
79 isalpha(*s) || isdigit(*s) || *s == '_';
82 while (*s && !isalpha(*s)) s++;
84 nameary[++arymax] = savestr(tokenbuf);
91 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
92 if (do_split && need_entire && !absmaxfld)
93 split_to_array = TRUE;
94 if (do_split && split_to_array)
95 set_array_base = TRUE;
97 str_cat(str,"$[ = 1;\t\t\t# set array base to 1\n");
99 if (fswitch && !const_FS)
101 if (saw_FS > 1 || saw_RS)
103 if (saw_ORS && need_entire)
106 str_cat(str,"$FS = '");
107 if (strchr("*+?.[]()|^$\\",fswitch))
109 sprintf(tokenbuf,"%c",fswitch);
110 str_cat(str,tokenbuf);
111 str_cat(str,"';\t\t# field separator from -F switch\n");
113 else if (saw_FS && !const_FS) {
114 str_cat(str,"$FS = ' ';\t\t# set field separator\n");
117 str_cat(str,"$, = ' ';\t\t# set output field separator\n");
120 str_cat(str,"$\\ = \"\\n\";\t\t# set output record separator\n");
123 str_cat(str,"$ARGV0 = $0;\t\t# remember what we ran as\n");
125 if (str->str_cur > 20)
127 if (ops[node+2].ival) {
128 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
132 fstr = walk(0,level+1,ops[node+3].ival,&numarg,P_MIN);
133 if (*fstr->str_ptr) {
135 str_cat(str,"line: ");
136 str_cat(str,"while (<>) {\n");
138 if (saw_FS && !const_FS)
141 str_cat(str,"chop;\t# strip record separator\n");
145 emit_split(str,level);
151 str_cat(str,"continue {\n $FNRbase = $. if eof;\n}\n");
154 str_cat(str,"while (<>) { } # (no line actions)\n");
155 if (ops[node+4].ival) {
159 str_scat(str,fstr=walk(0,level,ops[node+4].ival,&numarg,P_MIN));
164 str_cat(str,"exit $ExitValue;\n");
170 for (len = 0; len < 4; len++) {
171 if (saw_getline & (1 << len)) {
172 sprintf(tokenbuf,"\nsub Getline%d {\n",len);
173 str_cat(str, tokenbuf);
176 str_cat(str," &Pick('',@_);\n");
178 str_cat(str," ($fh) = @_;\n");
182 str_cat(str," $FNRbase = $. if eof;\n");
185 str_cat(str," local($_);\n");
188 " if ($getline_ok = (($_ = <$fh>) ne ''))");
191 " if ($getline_ok = (($_ = <>) ne ''))");
192 str_cat(str, " {\n");
198 str_cat(str,"chop;\t# strip record separator\n");
201 if (do_split && !(len & 1)) {
203 emit_split(str,level);
208 str_cat(str,"}\n $_;\n}\n");
213 if (do_fancy_opens) {
216 local($mode,$name,$pipe) = @_;\n\
218 open($name,$mode.$name.$pipe) unless $opened{$name}++;\n\
224 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
225 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
228 str_scat(str,fstr=walk(0,level,ops[node+3].ival,&numarg,P_MIN));
236 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
238 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
246 tmpstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN);
247 /* translate \nnn to [\nnn] */
248 for (s = tmpstr->str_ptr, d = tokenbuf; *s; s++, d++) {
249 if (*s == '\\' && isdigit(s[1]) && isdigit(s[2]) && isdigit(s[3])){
261 for (d=tokenbuf; *d; d++)
263 str_cat(str,tokenbuf);
270 str = walk(0,level,oper1(OPRINT,0),&numarg,P_MIN);
272 str_scat(str,fstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN));
277 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
278 if (*tmpstr->str_ptr) {
281 str_scat(str,tmpstr);
282 str_cat(str,") {\n");
284 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
291 str = walk(0,level,ops[node+2].ival,&numarg,P_MIN);
298 str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
304 str = walk(1,level,ops[node+1].ival,&numarg,prec);
306 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
308 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
313 str = walk(1,level,ops[node+1].ival,&numarg,prec);
315 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
317 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
324 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
329 str = walk(1,level,ops[node+1].ival,&numarg,prec);
331 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
334 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
340 str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
347 str = walk(1,level,ops[node+1].ival,&numarg,prec);
350 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
352 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
357 str = walk(1,level,ops[node+1].ival,&numarg,prec);
360 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
362 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
369 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
375 str = walk(1,level,ops[node+2].ival,&numarg,prec+1);
377 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
378 tmp2str = walk(1,level,ops[node+3].ival,&numarg,prec+1);
381 (!numarg && (*tmp2str->str_ptr == '"' || *tmp2str->str_ptr == '\''))) {
384 str_set(tmpstr,"eq");
385 else if (strEQ(t,"!="))
386 str_set(tmpstr,"ne");
387 else if (strEQ(t,"<"))
388 str_set(tmpstr,"lt");
389 else if (strEQ(t,"<="))
390 str_set(tmpstr,"le");
391 else if (strEQ(t,">"))
392 str_set(tmpstr,"gt");
393 else if (strEQ(t,">="))
394 str_set(tmpstr,"ge");
395 if (!strchr(tmpstr->str_ptr,'\'') && !strchr(tmpstr->str_ptr,'"') &&
396 !strchr(tmp2str->str_ptr,'\'') && !strchr(tmp2str->str_ptr,'"') )
400 if (numeric & 1) /* numeric is very good guess */
408 str_scat(str,tmpstr);
411 str_scat(str,tmp2str);
418 str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
425 str = walk(1,level,ops[node+2].ival,&numarg,prec+1);
427 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
428 if (strEQ(tmpstr->str_ptr,"~"))
431 str_scat(str,tmpstr);
435 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
443 fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
450 type = ops[ops[node+1].ival].ival & 255;
451 str = walk(1,level,ops[node+1].ival,&numarg,prec+(type != OCONCAT));
453 type = ops[ops[node+2].ival].ival & 255;
455 fstr=walk(1,level,ops[node+2].ival,&numarg,prec+(type != OCONCAT)));
460 str = walk(0,level,ops[node+2].ival,&numarg,prec+1);
462 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
463 str_scat(str,tmpstr);
464 if (str_len(tmpstr) > 1)
468 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec));
471 if (strEQ(str->str_ptr,"$/ = ''"))
472 str_set(str, "$/ = \"\\n\\n\"");
476 str = walk(1,level,ops[node+1].ival,&numarg,prec);
478 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
484 str = walk(1,level,ops[node+1].ival,&numarg,prec);
486 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
492 str = walk(1,level,ops[node+1].ival,&numarg,prec);
494 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
500 str = walk(1,level,ops[node+1].ival,&numarg,prec);
502 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
508 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
510 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec));
516 str = walk(1,level,ops[node+1].ival,&numarg,prec);
518 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
524 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
530 str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
538 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
546 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
554 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
565 fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
575 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
576 if (!*fstr->str_ptr) {
578 len = 2; /* a legal fiction */
585 tmpstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN);
586 fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
587 if (!do_fancy_opens) {
589 if (*t == '"' || *t == '\'')
590 t = cpytill(tokenbuf,t+1,*t);
592 fatal("Internal error: OGETLINE %s", t);
594 s = savestr(tokenbuf);
595 for (t = tokenbuf; *t; t++) {
599 if (!isalpha(*t) && !isdigit(*t))
602 if (!strchr(tokenbuf,'_'))
604 tmp3str = hfetch(symtab,tokenbuf);
607 str_cat(opens,"open(");
608 str_cat(opens,tokenbuf);
612 str_cat(opens,tmpstr->str_ptr+1);
614 if (*fstr->str_ptr == '|')
617 if (*fstr->str_ptr == '|')
618 str_cat(opens,") || die 'Cannot pipe from \"");
620 str_cat(opens,") || die 'Cannot open file \"");
622 str_cat(opens,"'.\"");
625 str_cat(opens,"\".'");
626 str_cat(opens,"\".';\n");
627 hstore(symtab,tokenbuf,str_make("x"));
632 str_cat(tmpstr,tokenbuf);
635 if (*fstr->str_ptr == '|')
636 str_cat(tmpstr,", '|'");
640 tmpstr = str_make("");
641 sprintf(tokenbuf," = &Getline%d(%s)",len,tmpstr->str_ptr);
642 str_cat(str,tokenbuf);
645 str_cat(str,",$getline_ok)");
646 saw_getline |= 1 << len;
650 str_set(str,"sprintf(");
651 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
657 str_set(str,"substr(");
658 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
661 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_COMMA+1));
665 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_COMMA+1));
669 str_cat(str,"999999");
674 str_set(str,ops[node+1].cval);
680 tmpstr = walk(1,level,ops[node+2].ival,&numarg,P_MIN);
685 str_scat(str,tmpstr);
686 str_cat(str," = split(");
688 fstr = walk(1,level,ops[node+3].ival,&numarg,P_COMMA+1);
689 if (str_len(fstr) == 3 && *fstr->str_ptr == '\'') {
690 i = fstr->str_ptr[1] & 127;
691 if (strchr("*+?.[]()|^$\\",i))
692 sprintf(tokenbuf,"/\\%c/",i);
694 sprintf(tokenbuf,"' '");
696 sprintf(tokenbuf,"/%c/",i);
697 str_cat(str,tokenbuf);
704 sprintf(tokenbuf,"/[%c\\n]/",const_FS);
705 str_cat(str,tokenbuf);
714 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
724 str_set(str,"index(");
725 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
728 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_COMMA+1));
736 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MATCH+1));
739 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MATCH+1));
741 str_cat(str," && ($RLENGTH = length($&), $RSTART = length($`)+1)");
747 fstr=walk(1,level-1,ops[node+2].ival,&numarg,P_MIN);
748 curargs = str_new(0);
749 str_sset(curargs,fstr);
750 str_cat(curargs,",");
751 tmp2str=walk(1,level,ops[node+5].ival,&numarg,P_MIN);
757 t = tmp2str->str_ptr;
758 while (t = instr(t,"return "))
762 for (t = s+7; *t; t++) {
763 if (*t == ';' || *t == '}')
768 tmp2str->str_cur -= 7;
774 str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
778 str_cat(str,"local(");
780 str_cat(str,") = @_;");
783 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN));
786 str_scat(str,fstr=walk(1,level,ops[node+4].ival,&numarg,P_MIN));
789 str_scat(str,tmp2str);
797 tmp2str = str_new(0);
799 str_set(tmp2str,"1");
800 hstore(symtab,tmpstr->str_ptr,tmp2str);
807 str_cat(str,"return ");
808 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_UNI+1));
814 str_cat(str,"return");
819 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
822 tmpstr = hfetch(symtab,str->str_ptr+3);
823 if (tmpstr && tmpstr->str_ptr)
824 numeric |= atoi(tmpstr->str_ptr);
825 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
839 tmpstr = walk(1,level,ops[node+3].ival,&numarg,P_MATCH+1);
840 if (strNE(tmpstr->str_ptr,"$_")) {
841 str_cat(tmpstr, " =~ s");
845 str_set(tmpstr, "s");
848 str_set(tmpstr, "s");
849 type = ops[ops[node+2].ival].ival;
852 tmp3str = str_new(0);
854 tmp2str=walk(1,level,ops[ops[node+2].ival+1].ival,&numarg,P_MIN);
855 for (t = tmp2str->str_ptr, d=tokenbuf; *t; d++,t++) {
863 str_set(tmp2str,tokenbuf);
866 tmp2str=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
867 str_set(tmp3str,"($s_ = '\"'.(");
868 str_scat(tmp3str,tmp2str);
869 str_cat(tmp3str,").'\"') =~ s/&/\\$&/g, ");
870 str_set(tmp2str,"eval $s_");
871 s = (*s == 'g' ? "ge" : "e");
874 type = ops[ops[node+1].ival].ival;
877 fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN);
878 if (type == OREGEX) {
881 str_scat(str,tmp3str);
882 str_scat(str,tmpstr);
884 str_scat(str,tmp2str);
888 else if ((type == OFLD && !split_to_array) || (type == OVAR && len == 1)) {
891 str_scat(str,tmp3str);
892 str_scat(str,tmpstr);
896 str_scat(str,tmp2str);
904 str_cat(str,"$s = ");
907 str_scat(str,tmp3str);
908 str_scat(str,tmpstr);
910 str_scat(str,tmp2str);
923 str = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
927 tmpstr = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
929 for (t = tmpstr->str_ptr, d=tokenbuf; *t; d++,t++) {
932 else if (*t == '\\') {
936 case '\\': case '"': case 'n': case 't': case '$':
938 default: /* hide this from perl */
947 str_cat(str,tokenbuf);
954 str_set(str,"defined $");
958 str_set(str,"delete $");
968 str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
970 tmp2str = hfetch(symtab,tmpstr->str_ptr);
971 if (tmp2str && atoi(tmp2str->str_ptr))
973 if (strEQ(str->str_ptr,"$FNR")) {
976 str_set(str,"($.-$FNRbase)");
978 else if (strEQ(str->str_ptr,"$NR")) {
982 else if (strEQ(str->str_ptr,"$NF")) {
984 str_set(str,"$#Fld");
986 else if (strEQ(str->str_ptr,"$0"))
988 else if (strEQ(str->str_ptr,"$ARGC"))
989 str_set(str,"($#ARGV+1)");
994 sprintf(tokenbuf,"$%s,",tmpstr->str_ptr);
995 ??? if (instr(curargs->str_ptr,tokenbuf))
996 str_cat(str,"\377"); /* can't translate yet */
999 str_cat(tmpstr,"[]");
1000 tmp2str = hfetch(symtab,tmpstr->str_ptr);
1001 if (tmp2str && atoi(tmp2str->str_ptr))
1005 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
1007 if (strEQ(str->str_ptr,"$ARGV[0")) {
1008 str_set(str,"$ARGV0");
1012 if (tmp2str && atoi(tmp2str->str_ptr))
1013 strcpy(tokenbuf,"]");
1015 strcpy(tokenbuf,"}");
1017 str_cat(str,tokenbuf);
1024 if (split_to_array) {
1025 str_set(str,"$Fld");
1027 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1032 i = atoi(walk(1,level,ops[node+1].ival,&numarg,P_MIN)->str_ptr);
1034 sprintf(tokenbuf,"$%s",nameary[i]);
1036 sprintf(tokenbuf,"$Fld%d",i);
1037 str_set(str,tokenbuf);
1042 str_set(str,"$Fld[");
1043 i = ops[node+1].ival;
1044 if ((ops[i].ival & 255) == OPAREN)
1046 tmpstr=walk(1,level,i,&numarg,P_MIN);
1047 str_scat(str,tmpstr);
1066 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1067 for (s = tmpstr->str_ptr; *s && *s != '\n'; s++)
1069 str_scat(str,tmpstr);
1075 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1076 for (s = tmpstr->str_ptr; *s && *s != '\n'; s++)
1078 str_scat(str,tmpstr);
1084 str = walk(1,level,ops[node+1].ival,&numarg,prec);
1086 str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
1088 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
1097 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1098 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1104 str_scat(str,fstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN));
1107 tmpstr = walk(0,level,ops[node+2].ival,&numarg,P_MIN);
1108 if (*tmpstr->str_ptr == ';') {
1110 str_cat(str,tmpstr->str_ptr+1);
1117 str = str_make("close(");
1118 tmpstr = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
1119 if (!do_fancy_opens) {
1120 t = tmpstr->str_ptr;
1121 if (*t == '"' || *t == '\'')
1122 t = cpytill(tokenbuf,t+1,*t);
1124 fatal("Internal error: OCLOSE %s",t);
1125 s = savestr(tokenbuf);
1126 for (t = tokenbuf; *t; t++) {
1130 if (!isalpha(*t) && !isdigit(*t))
1133 if (!strchr(tokenbuf,'_'))
1137 str_set(str,"close ");
1138 str_cat(str,tokenbuf);
1141 sprintf(tokenbuf,"delete $opened{%s} && close(%s)",
1142 tmpstr->str_ptr, tmpstr->str_ptr);
1144 str_set(str,tokenbuf);
1149 lparen = ""; /* set to parens if necessary */
1152 if (len == 3) { /* output redirection */
1153 tmpstr = walk(1,level,ops[node+3].ival,&numarg,P_MIN);
1154 tmp2str = walk(1,level,ops[node+2].ival,&numarg,P_MIN);
1155 if (!do_fancy_opens) {
1156 t = tmpstr->str_ptr;
1157 if (*t == '"' || *t == '\'')
1158 t = cpytill(tokenbuf,t+1,*t);
1160 fatal("Internal error: OPRINT");
1162 s = savestr(tokenbuf);
1163 for (t = tokenbuf; *t; t++) {
1167 if (!isalpha(*t) && !isdigit(*t))
1170 if (!strchr(tokenbuf,'_'))
1172 tmp3str = hfetch(symtab,tokenbuf);
1174 str_cat(opens,"open(");
1175 str_cat(opens,tokenbuf);
1176 str_cat(opens,", ");
1179 str_scat(opens,tmp2str);
1180 str_cat(opens,tmpstr->str_ptr+1);
1181 if (*tmp2str->str_ptr == '|')
1182 str_cat(opens,") || die 'Cannot pipe to \"");
1184 str_cat(opens,") || die 'Cannot create file \"");
1186 str_cat(opens,"'.\"");
1189 str_cat(opens,"\".'");
1190 str_cat(opens,"\".';\n");
1191 hstore(symtab,tokenbuf,str_make("x"));
1199 sprintf(tokenbuf,"&Pick('%s', %s) &&\n",
1200 tmp2str->str_ptr, tmpstr->str_ptr);
1201 str_cat(str,tokenbuf);
1203 strcpy(tokenbuf,"$fh");
1211 strcpy(tokenbuf,"");
1212 str_cat(str,lparen); /* may be null */
1213 if (type == OPRINTF)
1214 str_cat(str,"printf");
1216 str_cat(str,"print");
1218 if (len == 3 || do_fancy_opens) {
1223 str_cat(str,tokenbuf);
1225 tmpstr = walk(1+(type==OPRINT),level,ops[node+1].ival,&numarg,P_MIN);
1226 if (!*tmpstr->str_ptr && lval_field) {
1227 t = saw_OFS ? "$," : "' '";
1228 if (split_to_array) {
1229 sprintf(tokenbuf,"join(%s,@Fld)",t);
1230 str_cat(tmpstr,tokenbuf);
1233 for (i = 1; i < maxfld; i++) {
1235 sprintf(tokenbuf,"$%s, ",nameary[i]);
1237 sprintf(tokenbuf,"$Fld%d, ",i);
1238 str_cat(tmpstr,tokenbuf);
1240 if (maxfld <= arymax)
1241 sprintf(tokenbuf,"$%s",nameary[maxfld]);
1243 sprintf(tokenbuf,"$Fld%d",maxfld);
1244 str_cat(tmpstr,tokenbuf);
1247 if (*tmpstr->str_ptr) {
1249 if (!saw_fh && *tmpstr->str_ptr == '(') {
1251 str_scat(str,tmpstr);
1255 str_scat(str,tmpstr);
1260 str_cat(str,rparen); /* may be null */
1264 str = str_make("rand(1)");
1267 str = str_make("srand(");
1270 str = str_make("atan2(");
1273 str = str_make("sin(");
1276 str = str_make("cos(");
1279 str = str_make("system(");
1282 str = str_make("length(");
1285 str = str_make("log(");
1288 str = str_make("exp(");
1291 str = str_make("sqrt(");
1294 str = str_make("int(");
1298 tmpstr = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
1300 tmpstr = str_new(0);;
1301 if (!tmpstr->str_ptr || !*tmpstr->str_ptr) {
1303 t = saw_OFS ? "$," : "' '";
1304 if (split_to_array) {
1305 sprintf(tokenbuf,"join(%s,@Fld)",t);
1306 str_cat(tmpstr,tokenbuf);
1309 sprintf(tokenbuf,"join(%s, ",t);
1310 str_cat(tmpstr,tokenbuf);
1311 for (i = 1; i < maxfld; i++) {
1313 sprintf(tokenbuf,"$%s,",nameary[i]);
1315 sprintf(tokenbuf,"$Fld%d,",i);
1316 str_cat(tmpstr,tokenbuf);
1318 if (maxfld <= arymax)
1319 sprintf(tokenbuf,"$%s)",nameary[maxfld]);
1321 sprintf(tokenbuf,"$Fld%d)",maxfld);
1322 str_cat(tmpstr,tokenbuf);
1326 str_cat(tmpstr,"$_");
1328 if (strEQ(tmpstr->str_ptr,"$_")) {
1329 if (type == OLENGTH && !do_chop) {
1330 str = str_make("(length(");
1331 str_cat(tmpstr,") - 1");
1334 str_scat(str,tmpstr);
1340 str_set(str,"last");
1344 str_set(str,"next line");
1350 str_set(str,"exit");
1355 fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
1361 str_set(str,"$ExitValue = ");
1364 fstr=walk(1,level,ops[node+1].ival,&numarg,P_ASSIGN));
1368 str_cat(str,"last line");
1373 str_set(str,"next");
1379 str_set(str,"if (");
1380 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1383 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1386 i = ops[node+3].ival;
1388 if ((ops[i].ival & 255) == OBLOCK) {
1391 if ((ops[i].ival & 255) != OIF)
1400 str_scat(str,fstr=walk(0,level,i,&numarg,P_MIN));
1404 str_cat(str,"else ");
1405 str_scat(str,fstr=walk(0,level,ops[node+3].ival,&numarg,P_MIN));
1412 str_set(str,"while (");
1413 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1416 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1422 str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1424 if (str->str_ptr[str->str_cur - 1] == '\n')
1426 str_cat(str," while (");
1427 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1433 str_set(str,"for (");
1434 str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1437 t = s = tmpstr->str_ptr;
1438 while (isalpha(*t) || isdigit(*t) || *t == '$' || *t == '_')
1445 fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
1446 if (i && (t = strchr(fstr->str_ptr,0377))) {
1447 if (strnEQ(fstr->str_ptr,s,i))
1454 str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN));
1457 str_scat(str,fstr=walk(0,level,ops[node+4].ival,&numarg,P_MIN));
1461 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1462 d = strchr(tmpstr->str_ptr,'$');
1464 fatal("Illegal for loop: %s",tmpstr->str_ptr);
1469 fatal("Illegal for loop: %s",d);
1471 for (t = s; i = *t; t++) {
1473 if (i == '}' || i == ']')
1481 tmp2str = hfetch(symtab,str->str_ptr);
1482 if (tmp2str && atoi(tmp2str->str_ptr)) {
1484 "foreach %s ($[ .. $#%s) ",
1490 "foreach %s (keys %%%s) ",
1494 str_set(str,tokenbuf);
1495 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1502 if (len >= 2 && ops[node+2].ival) {
1503 str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
1506 fixtab(str,++level);
1507 str_scat(str,fstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN));
1510 fixtab(str,--level);
1514 str_scat(str,fstr=walk(0,level,ops[node+3].ival,&numarg,P_MIN));
1522 fatal("Garbage length in walk");
1523 str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1524 for (i = 2; i<= len; i++) {
1525 str_scat(str,fstr=walk(0,level,ops[node+i].ival,&numarg,P_MIN));
1537 if (useval && prec < minprec) { /* need parens? */
1538 fstr = str_new(str->str_cur+2);
1539 str_nset(fstr,"(",1);
1541 str_ncat(fstr,")",1);
1546 *numericptr = numeric;
1549 printf("%3d %5d %15s %d %4d ",level,node,opname[type],len,str->str_cur);
1550 for (t = str->str_ptr; *t && t - str->str_ptr < 40; t++)
1553 else if (*t == '\t')
1583 /* strip trailing white space */
1585 s = str->str_ptr+str->str_cur - 1;
1586 while (s >= str->str_ptr && (*s == ' ' || *s == '\t' || *s == '\n'))
1589 str->str_cur = s + 1 - str->str_ptr;
1590 if (s >= str->str_ptr && *s != '\n')
1602 s = str->str_ptr+str->str_cur - 1;
1603 while (s >= str->str_ptr && (*s == ' ' || *s == '\t' || *s == '\n'))
1605 if (s >= str->str_ptr && *s != ';' && *s != '}')
1610 emit_split(str,level)
1617 str_cat(str,"@Fld");
1620 for (i = 1; i < maxfld; i++) {
1622 sprintf(tokenbuf,"$%s,",nameary[i]);
1624 sprintf(tokenbuf,"$Fld%d,",i);
1625 str_cat(str,tokenbuf);
1627 if (maxfld <= arymax)
1628 sprintf(tokenbuf,"$%s)",nameary[maxfld]);
1630 sprintf(tokenbuf,"$Fld%d)",maxfld);
1631 str_cat(str,tokenbuf);
1634 sprintf(tokenbuf," = split(/[%c\\n]/, $_, 9999);\n",const_FS);
1635 str_cat(str,tokenbuf);
1638 str_cat(str," = split($FS, $_, 9999);\n");
1640 str_cat(str," = split(' ', $_, 9999);\n");
1645 prewalk(numit,level,node,numericptr)
1655 int numeric = FALSE;
1663 type = ops[node].ival;
1668 prewalk(0,level,ops[node+1].ival,&numarg);
1669 if (ops[node+2].ival) {
1670 prewalk(0,level,ops[node+2].ival,&numarg);
1673 prewalk(0,level,ops[node+3].ival,&numarg);
1675 if (ops[node+3].ival) {
1676 prewalk(0,level,ops[node+4].ival,&numarg);
1680 prewalk(0,level,ops[node+1].ival,&numarg);
1681 prewalk(0,level,ops[node+2].ival,&numarg);
1683 prewalk(0,level,ops[node+3].ival,&numarg);
1687 prewalk(1,level,ops[node+1].ival,&numarg);
1688 prewalk(1,level,ops[node+2].ival,&numarg);
1693 prewalk(0,level,ops[node+1].ival,&numarg);
1697 prewalk(0,level,ops[node+1].ival,&numarg);
1700 i = prewalk(0,level,ops[node+1].ival,&numarg);
1703 prewalk(0,level,ops[node+2].ival,&numarg);
1707 prewalk(0,level,ops[node+2].ival,&numarg);
1712 prewalk(0,level,ops[node+1].ival,&numarg);
1715 prewalk(0,level,ops[node+1].ival,&numarg);
1716 prewalk(0,level,ops[node+2].ival,&numarg);
1719 prewalk(0,level,ops[node+1].ival,&numarg);
1720 prewalk(0,level,ops[node+2].ival,&numarg);
1723 prewalk(0,level,ops[node+1].ival,&numarg);
1726 prewalk(0,level,ops[node+1].ival,&numarg);
1730 prewalk(0,level,ops[node+1].ival,&numarg);
1732 prewalk(0,level,ops[node+2].ival,&numarg);
1735 prewalk(0,level,ops[node+1].ival,&numarg);
1737 prewalk(0,level,ops[node+2].ival,&numarg);
1740 prewalk(0,level,ops[node+1].ival,&numarg);
1744 prewalk(0,level,ops[node+2].ival,&numarg);
1746 prewalk(0,level,ops[node+1].ival,&numarg);
1747 prewalk(0,level,ops[node+3].ival,&numarg);
1752 prewalk(0,level,ops[node+1].ival,&numarg);
1756 prewalk(0,level,ops[node+2].ival,&numarg);
1757 prewalk(0,level,ops[node+1].ival,&numarg);
1758 prewalk(0,level,ops[node+3].ival,&numarg);
1762 prewalk(0,level,ops[node+1].ival,&numarg);
1766 prewalk(0,level,ops[node+1].ival,&numarg);
1767 prewalk(0,level,ops[node+2].ival,&numarg);
1770 prewalk(0,level,ops[node+2].ival,&numarg);
1771 prewalk(0,level,ops[node+1].ival,&numarg);
1772 prewalk(0,level,ops[node+3].ival,&numarg);
1773 if (numarg || strlen(ops[ops[node+1].ival+1].cval) > (Size_t)1) {
1774 numericize(ops[node+2].ival);
1776 numericize(ops[node+3].ival);
1781 prewalk(1,level,ops[node+1].ival,&numarg);
1782 prewalk(1,level,ops[node+2].ival,&numarg);
1786 prewalk(1,level,ops[node+1].ival,&numarg);
1787 prewalk(1,level,ops[node+2].ival,&numarg);
1791 prewalk(1,level,ops[node+1].ival,&numarg);
1792 prewalk(1,level,ops[node+2].ival,&numarg);
1796 prewalk(1,level,ops[node+1].ival,&numarg);
1797 prewalk(1,level,ops[node+2].ival,&numarg);
1801 prewalk(1,level,ops[node+1].ival,&numarg);
1802 prewalk(1,level,ops[node+2].ival,&numarg);
1806 prewalk(1,level,ops[node+1].ival,&numarg);
1807 prewalk(1,level,ops[node+2].ival,&numarg);
1811 prewalk(1,level,ops[node+1].ival,&numarg);
1815 prewalk(1,level,ops[node+1].ival,&numarg);
1819 prewalk(1,level,ops[node+1].ival,&numarg);
1823 prewalk(1,level,ops[node+1].ival,&numarg);
1827 prewalk(1,level,ops[node+1].ival,&numarg);
1831 prewalk(1,level,ops[node+1].ival,&numarg);
1835 prewalk(0,level,ops[node+1].ival,&numarg);
1841 prewalk(0,level,ops[node+1].ival,&numarg);
1844 prewalk(0,level,ops[node+1].ival,&numarg);
1845 prewalk(1,level,ops[node+2].ival,&numarg);
1847 prewalk(1,level,ops[node+3].ival,&numarg);
1854 prewalk(0,level,ops[node+2].ival,&numarg);
1856 prewalk(0,level,ops[node+3].ival,&numarg);
1857 prewalk(0,level,ops[node+1].ival,&numarg);
1860 prewalk(0,level,ops[node+1].ival,&numarg);
1861 prewalk(0,level,ops[node+2].ival,&numarg);
1865 prewalk(0,level,ops[node+1].ival,&numarg);
1866 prewalk(0,level,ops[node+2].ival,&numarg);
1872 tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
1874 prewalk(0,level,ops[node+2].ival,&numarg);
1875 prewalk(0,level,ops[node+4].ival,&numarg);
1876 prewalk(0,level,ops[node+5].ival,&numarg);
1878 str_cat(tmpstr,"(");
1879 tmp2str = str_new(0);
1880 if (subretnum || numarg)
1881 str_set(tmp2str,"1");
1882 hstore(symtab,tmpstr->str_ptr,tmp2str);
1888 prewalk(0,level,ops[node+1].ival,&numarg);
1894 tmp2str = str_new(0);
1895 str_scat(tmp2str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
1896 fixrargs(tmpstr->str_ptr,ops[node+2].ival,0);
1898 str_cat(tmp2str,"(");
1899 tmpstr = hfetch(symtab,tmp2str->str_ptr);
1900 if (tmpstr && tmpstr->str_ptr)
1901 numeric |= atoi(tmpstr->str_ptr);
1902 prewalk(0,level,ops[node+2].ival,&numarg);
1908 prewalk(0,level,ops[node+3].ival,&numarg);
1909 prewalk(0,level,ops[ops[node+2].ival+1].ival,&numarg);
1910 prewalk(0,level,ops[node+1].ival,&numarg);
1914 prewalk(0,level,ops[node+1].ival,&numarg);
1918 prewalk(0,level,ops[node+1].ival,&numarg);
1924 prewalk(0,level,ops[node+1].ival,&numarg);
1930 prewalk(0,level,ops[node+2].ival,&numarg);
1934 prewalk(0,level,ops[node+1].ival,&numarg);
1937 i = ops[node+1].ival;
1938 prewalk(0,level,i,&numarg);
1951 prewalk(0,level,ops[node+1].ival,&numarg);
1952 prewalk(0,level,ops[node+2].ival,&numarg);
1953 prewalk(0,level,ops[node+3].ival,&numarg);
1958 prewalk(0,level,ops[node+1].ival,&numarg);
1959 prewalk(0,level,ops[node+2].ival,&numarg);
1963 prewalk(0,level,ops[node+1].ival,&numarg);
1965 prewalk(0,level,ops[node+2].ival,&numarg);
1970 prewalk(0,level,ops[node+1].ival,&numarg);
1974 if (len == 3) { /* output redirection */
1975 prewalk(0,level,ops[node+3].ival,&numarg);
1976 prewalk(0,level,ops[node+2].ival,&numarg);
1978 prewalk(0+(type==OPRINT),level,ops[node+1].ival,&numarg);
2004 prewalk(type != OLENGTH && type != OSYSTEM,
2005 level,ops[node+1].ival,&numarg);
2013 prewalk(1,level,ops[node+1].ival,&numarg);
2021 prewalk(0,level,ops[node+1].ival,&numarg);
2022 prewalk(0,level,ops[node+2].ival,&numarg);
2024 prewalk(0,level,ops[node+3].ival,&numarg);
2028 prewalk(0,level,ops[node+1].ival,&numarg);
2029 prewalk(0,level,ops[node+2].ival,&numarg);
2032 prewalk(0,level,ops[node+1].ival,&numarg);
2033 prewalk(0,level,ops[node+2].ival,&numarg);
2034 prewalk(0,level,ops[node+3].ival,&numarg);
2035 prewalk(0,level,ops[node+4].ival,&numarg);
2038 prewalk(0,level,ops[node+2].ival,&numarg);
2039 prewalk(0,level,ops[node+1].ival,&numarg);
2043 prewalk(0,level,ops[node+2].ival,&numarg);
2046 prewalk(0,level,ops[node+1].ival,&numarg);
2053 fatal("Garbage length in prewalk");
2054 prewalk(0,level,ops[node+1].ival,&numarg);
2055 for (i = 2; i<= len; i++) {
2056 prewalk(0,level,ops[node+i].ival,&numarg);
2061 *numericptr = numeric;
2075 type = ops[node].ival;
2078 if (type == OVAR && len == 1) {
2079 tmpstr=walk(0,0,ops[node+1].ival,&numarg,P_MIN);
2080 tmp2str = str_make("1");
2081 hstore(symtab,tmpstr->str_ptr,tmp2str);