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walk.c
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walk.c
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/* walk.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1997, 1998, 1999,
* 2000, 2001, 2002, 2005 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*/
#include "EXTERN.h"
#include "a2p.h"
#include "util.h"
bool exitval = FALSE;
bool realexit = FALSE;
bool saw_getline = FALSE;
bool subretnum = FALSE;
bool saw_FNR = FALSE;
bool saw_argv0 = FALSE;
bool saw_fh = FALSE;
int maxtmp = 0;
const char *lparen;
const char *rparen;
const char *limit;
STR *subs;
STR *curargs = NULL;
static void addsemi ( STR *str );
static void emit_split ( STR *str, int level );
static void fixtab ( STR *str, int lvl );
static void numericize ( int node );
static void tab ( STR *str, int lvl );
int prewalk ( int numit, int level, int node, int *numericptr );
STR * walk ( int useval, int level, int node, int *numericptr, int minprec );
#ifdef NETWARE
char *savestr(char *str);
char *cpytill(register char *to, register char *from, register int delim);
char *instr(char *big, const char *little);
#endif
STR *
walk(int useval, int level, register int node, int *numericptr, int minprec)
{
register int len;
register STR *str;
register int type;
register int i;
register STR *tmpstr;
STR *tmp2str;
STR *tmp3str;
char *t;
char *d, *s;
int numarg;
int numeric = FALSE;
STR *fstr;
int prec = P_MAX; /* assume no parens needed */
if (!node) {
*numericptr = 0;
return str_make("");
}
type = ops[node].ival;
len = type >> 8;
type &= 255;
switch (type) {
case OPROG:
arymax = 0;
if (namelist) {
while (isALPHA(*namelist)) {
for (d = tokenbuf,s=namelist;
isALPHA(*s) || isDIGIT(*s) || *s == '_';
*d++ = *s++) ;
*d = '\0';
while (*s && !isALPHA(*s)) s++;
namelist = s;
nameary[++arymax] = savestr(tokenbuf);
}
}
if (maxfld < arymax)
maxfld = arymax;
opens = str_new(0);
subs = str_new(0);
str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
if (do_split && need_entire && !absmaxfld)
split_to_array = TRUE;
if (fswitch && !const_FS)
const_FS = fswitch;
if (saw_FS > 1 || saw_RS)
const_FS = 0;
if (saw_ORS && need_entire)
do_chop = TRUE;
if (fswitch) {
str_cat(str,"$FS = '");
if (strchr("*+?.[]()|^$\\",fswitch))
str_cat(str,"\\");
sprintf(tokenbuf,"%c",fswitch);
str_cat(str,tokenbuf);
str_cat(str,"';\t\t# field separator from -F switch\n");
}
else if (saw_FS && !const_FS) {
str_cat(str,"$FS = ' ';\t\t# set field separator\n");
}
if (saw_OFS) {
str_cat(str,"$, = ' ';\t\t# set output field separator\n");
}
if (saw_ORS) {
str_cat(str,"$\\ = \"\\n\";\t\t# set output record separator\n");
}
if (saw_argv0) {
str_cat(str,"$ARGV0 = $0;\t\t# remember what we ran as\n");
}
if (str->str_cur > 20)
str_cat(str,"\n");
if (ops[node+2].ival) {
str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,"\n\n");
}
fstr = walk(0,level+1,ops[node+3].ival,&numarg,P_MIN);
if (*fstr->str_ptr) {
if (saw_line_op)
str_cat(str,"line: ");
str_cat(str,"while (<>) {\n");
tab(str,++level);
if (saw_FS && !const_FS)
do_chop = TRUE;
if (do_chop) {
str_cat(str,"chomp;\t# strip record separator\n");
tab(str,level);
}
if (do_split)
emit_split(str,level);
str_scat(str,fstr);
str_free(fstr);
fixtab(str,--level);
str_cat(str,"}\n");
if (saw_FNR)
str_cat(str,"continue {\n $FNRbase = $. if eof;\n}\n");
}
else if (old_awk)
str_cat(str,"while (<>) { } # (no line actions)\n");
if (ops[node+4].ival) {
realexit = TRUE;
str_cat(str,"\n");
tab(str,level);
str_scat(str,fstr=walk(0,level,ops[node+4].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,"\n");
}
if (exitval)
str_cat(str,"exit $ExitValue;\n");
if (subs->str_ptr) {
str_cat(str,"\n");
str_scat(str,subs);
}
if (saw_getline) {
for (len = 0; len < 4; len++) {
if (saw_getline & (1 << len)) {
sprintf(tokenbuf,"\nsub Getline%d {\n",len);
str_cat(str, tokenbuf);
if (len & 2) {
if (do_fancy_opens)
str_cat(str," &Pick('',@_);\n");
else
str_cat(str," ($fh) = @_;\n");
}
else {
if (saw_FNR)
str_cat(str," $FNRbase = $. if eof;\n");
}
if (len & 1)
str_cat(str," local($_);\n");
if (len & 2)
str_cat(str,
" if ($getline_ok = (($_ = <$fh>) ne ''))");
else
str_cat(str,
" if ($getline_ok = (($_ = <>) ne ''))");
str_cat(str, " {\n");
level += 2;
tab(str,level);
i = 0;
if (do_chop) {
i++;
str_cat(str,"chomp;\t# strip record separator\n");
tab(str,level);
}
if (do_split && !(len & 1)) {
i++;
emit_split(str,level);
}
if (!i)
str_cat(str,";\n");
fixtab(str,--level);
str_cat(str,"}\n $_;\n}\n");
--level;
}
}
}
if (do_fancy_opens) {
str_cat(str,"\n\
sub Pick {\n\
local($mode,$name,$pipe) = @_;\n\
$fh = $name;\n\
open($name,$mode.$name.$pipe) unless $opened{$name}++;\n\
}\n\
");
}
break;
case OHUNKS:
str = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
str_free(fstr);
if (len == 3) {
str_scat(str,fstr=walk(0,level,ops[node+3].ival,&numarg,P_MIN));
str_free(fstr);
}
else {
}
break;
case ORANGE:
prec = P_DOTDOT;
str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
str_cat(str," .. ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
break;
case OPAT:
goto def;
case OREGEX:
str = str_new(0);
str_set(str,"/");
tmpstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN);
/* translate \nnn to [\nnn] */
for (s = tmpstr->str_ptr, d = tokenbuf; *s; s++, d++) {
if (*s == '\\' && isDIGIT(s[1]) && isDIGIT(s[2]) && isDIGIT(s[3])){
*d++ = '[';
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
*d++ = *s;
*d = ']';
}
else
*d = *s;
}
*d = '\0';
for (d=tokenbuf; *d; d++)
*d += (char)128;
str_cat(str,tokenbuf);
str_free(tmpstr);
str_cat(str,"/");
break;
case OHUNK:
if (len == 1) {
str = str_new(0);
str = walk(0,level,oper1(OPRINT,0),&numarg,P_MIN);
str_cat(str," if ");
str_scat(str,fstr=walk(0,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,";");
}
else {
tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
if (*tmpstr->str_ptr) {
str = str_new(0);
str_set(str,"if (");
str_scat(str,tmpstr);
str_cat(str,") {\n");
tab(str,++level);
str_scat(str,fstr=walk(0,level,ops[node+2].ival,&numarg,P_MIN));
str_free(fstr);
fixtab(str,--level);
str_cat(str,"}\n");
tab(str,level);
}
else {
str = walk(0,level,ops[node+2].ival,&numarg,P_MIN);
}
}
break;
case OPPAREN:
str = str_new(0);
str_set(str,"(");
str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,")");
break;
case OPANDAND:
prec = P_ANDAND;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," && ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
str_free(fstr);
break;
case OPOROR:
prec = P_OROR;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," || ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
str_free(fstr);
break;
case OPNOT:
prec = P_UNARY;
str = str_new(0);
str_set(str,"!");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
str_free(fstr);
break;
case OCOND:
prec = P_COND;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," ? ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
str_cat(str," : ");
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
str_free(fstr);
break;
case OCPAREN:
str = str_new(0);
str_set(str,"(");
str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
numeric |= numarg;
str_cat(str,")");
break;
case OCANDAND:
prec = P_ANDAND;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
numeric = 1;
str_cat(str," && ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
str_free(fstr);
break;
case OCOROR:
prec = P_OROR;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
numeric = 1;
str_cat(str," || ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
str_free(fstr);
break;
case OCNOT:
prec = P_UNARY;
str = str_new(0);
str_set(str,"!");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
str_free(fstr);
numeric = 1;
break;
case ORELOP:
prec = P_REL;
str = walk(1,level,ops[node+2].ival,&numarg,prec+1);
numeric |= numarg;
tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
tmp2str = walk(1,level,ops[node+3].ival,&numarg,prec+1);
numeric |= numarg;
if (!numeric ||
(!numarg && (*tmp2str->str_ptr == '"' || *tmp2str->str_ptr == '\''))) {
t = tmpstr->str_ptr;
if (strEQ(t,"=="))
str_set(tmpstr,"eq");
else if (strEQ(t,"!="))
str_set(tmpstr,"ne");
else if (strEQ(t,"<"))
str_set(tmpstr,"lt");
else if (strEQ(t,"<="))
str_set(tmpstr,"le");
else if (strEQ(t,">"))
str_set(tmpstr,"gt");
else if (strEQ(t,">="))
str_set(tmpstr,"ge");
if (!strchr(tmpstr->str_ptr,'\'') && !strchr(tmpstr->str_ptr,'"') &&
!strchr(tmp2str->str_ptr,'\'') && !strchr(tmp2str->str_ptr,'"') )
numeric |= 2;
}
if (numeric & 2) {
if (numeric & 1) /* numeric is very good guess */
str_cat(str," ");
else
str_cat(str,"\377");
numeric = 1;
}
else
str_cat(str," ");
str_scat(str,tmpstr);
str_free(tmpstr);
str_cat(str," ");
str_scat(str,tmp2str);
str_free(tmp2str);
numeric = 1;
break;
case ORPAREN:
str = str_new(0);
str_set(str,"(");
str_scat(str,fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
numeric |= numarg;
str_cat(str,")");
break;
case OMATCHOP:
prec = P_MATCH;
str = walk(1,level,ops[node+2].ival,&numarg,prec+1);
str_cat(str," ");
tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
if (strEQ(tmpstr->str_ptr,"~"))
str_cat(str,"=~");
else {
str_scat(str,tmpstr);
str_free(tmpstr);
}
str_cat(str," ");
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case OMPAREN:
str = str_new(0);
str_set(str,"(");
str_scat(str,
fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
numeric |= numarg;
str_cat(str,")");
break;
case OCONCAT:
prec = P_ADD;
type = ops[ops[node+1].ival].ival & 255;
str = walk(1,level,ops[node+1].ival,&numarg,prec+(type != OCONCAT));
str_cat(str," . ");
type = ops[ops[node+2].ival].ival & 255;
str_scat(str,
fstr=walk(1,level,ops[node+2].ival,&numarg,prec+(type != OCONCAT)));
str_free(fstr);
break;
case OASSIGN:
prec = P_ASSIGN;
str = walk(0,level,ops[node+2].ival,&numarg,prec+1);
str_cat(str," ");
tmpstr = walk(0,level,ops[node+1].ival,&numarg,P_MIN);
str_scat(str,tmpstr);
if (str_len(tmpstr) > 1)
numeric = 1;
str_free(tmpstr);
str_cat(str," ");
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,prec));
str_free(fstr);
numeric |= numarg;
if (strEQ(str->str_ptr,"$/ = ''"))
str_set(str, "$/ = \"\\n\\n\"");
break;
case OADD:
prec = P_ADD;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," + ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case OSUBTRACT:
prec = P_ADD;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," - ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case OMULT:
prec = P_MUL;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," * ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case ODIV:
prec = P_MUL;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," / ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case OPOW:
prec = P_POW;
str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
str_cat(str," ** ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec));
str_free(fstr);
numeric = 1;
break;
case OMOD:
prec = P_MUL;
str = walk(1,level,ops[node+1].ival,&numarg,prec);
str_cat(str," % ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case OPOSTINCR:
prec = P_AUTO;
str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
str_cat(str,"++");
numeric = 1;
break;
case OPOSTDECR:
prec = P_AUTO;
str = walk(1,level,ops[node+1].ival,&numarg,prec+1);
str_cat(str,"--");
numeric = 1;
break;
case OPREINCR:
prec = P_AUTO;
str = str_new(0);
str_set(str,"++");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case OPREDECR:
prec = P_AUTO;
str = str_new(0);
str_set(str,"--");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec+1));
str_free(fstr);
numeric = 1;
break;
case OUMINUS:
prec = P_UNARY;
str = str_new(0);
str_set(str,"-");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,prec));
str_free(fstr);
numeric = 1;
break;
case OUPLUS:
numeric = 1;
goto def;
case OPAREN:
str = str_new(0);
str_set(str,"(");
str_scat(str,
fstr=walk(useval != 0,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,")");
numeric |= numarg;
break;
case OGETLINE:
str = str_new(0);
if (useval)
str_cat(str,"(");
if (len > 0) {
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
if (!*fstr->str_ptr) {
str_cat(str,"$_");
len = 2; /* a legal fiction */
}
str_free(fstr);
}
else
str_cat(str,"$_");
if (len > 1) {
tmpstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN);
fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
if (!do_fancy_opens) {
t = tmpstr->str_ptr;
if (*t == '"' || *t == '\'')
t = cpytill(tokenbuf,t+1,*t);
else
fatal("Internal error: OGETLINE %s", t);
d = savestr(t);
s = savestr(tokenbuf);
for (t = tokenbuf; *t; t++) {
*t &= 127;
if (isLOWER(*t))
*t = toUPPER(*t);
if (!isALPHA(*t) && !isDIGIT(*t))
*t = '_';
}
if (!strchr(tokenbuf,'_'))
strcpy(t,"_FH");
tmp3str = hfetch(symtab,tokenbuf);
if (!tmp3str) {
do_opens = TRUE;
str_cat(opens,"open(");
str_cat(opens,tokenbuf);
str_cat(opens,", ");
d[1] = '\0';
str_cat(opens,d);
str_cat(opens,tmpstr->str_ptr+1);
opens->str_cur--;
if (*fstr->str_ptr == '|')
str_cat(opens,"|");
str_cat(opens,d);
if (*fstr->str_ptr == '|')
str_cat(opens,") || die 'Cannot pipe from \"");
else
str_cat(opens,") || die 'Cannot open file \"");
if (*d == '"')
str_cat(opens,"'.\"");
str_cat(opens,s);
if (*d == '"')
str_cat(opens,"\".'");
str_cat(opens,"\".';\n");
hstore(symtab,tokenbuf,str_make("x"));
}
safefree(s);
safefree(d);
str_set(tmpstr,"'");
str_cat(tmpstr,tokenbuf);
str_cat(tmpstr,"'");
}
if (*fstr->str_ptr == '|')
str_cat(tmpstr,", '|'");
str_free(fstr);
}
else
tmpstr = str_make("");
sprintf(tokenbuf," = &Getline%d(%s)",len,tmpstr->str_ptr);
str_cat(str,tokenbuf);
str_free(tmpstr);
if (useval)
str_cat(str,",$getline_ok)");
saw_getline |= 1 << len;
break;
case OSPRINTF:
str = str_new(0);
str_set(str,"sprintf(");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,")");
break;
case OSUBSTR:
str = str_new(0);
str_set(str,"substr(");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
str_free(fstr);
str_cat(str,", (");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_COMMA+1));
str_free(fstr);
str_cat(str,")-1");
if (len == 3) {
str_cat(str,", ");
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_COMMA+1));
str_free(fstr);
}
str_cat(str,")");
break;
case OSTRING:
str = str_new(0);
str_set(str,ops[node+1].cval);
break;
case OSPLIT:
str = str_new(0);
limit = ", -1)";
numeric = 1;
tmpstr = walk(1,level,ops[node+2].ival,&numarg,P_MIN);
if (useval)
str_set(str,"(@");
else
str_set(str,"@");
str_scat(str,tmpstr);
str_cat(str," = split(");
if (len == 3) {
fstr = walk(1,level,ops[node+3].ival,&numarg,P_COMMA+1);
if (str_len(fstr) == 3 && *fstr->str_ptr == '\'') {
i = fstr->str_ptr[1] & 127;
if (strchr("*+?.[]()|^$\\",i))
sprintf(tokenbuf,"/\\%c/",i);
else if (i == ' ')
sprintf(tokenbuf,"' '");
else
sprintf(tokenbuf,"/%c/",i);
str_cat(str,tokenbuf);
}
else
str_scat(str,fstr);
str_free(fstr);
}
else if (const_FS) {
sprintf(tokenbuf,"/[%c\\n]/",const_FS);
str_cat(str,tokenbuf);
}
else if (saw_FS)
str_cat(str,"$FS");
else {
str_cat(str,"' '");
limit = ")";
}
str_cat(str,", ");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
str_free(fstr);
str_cat(str,limit);
if (useval) {
str_cat(str,")");
}
str_free(tmpstr);
break;
case OINDEX:
str = str_new(0);
str_set(str,"(1+index(");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_COMMA+1));
str_free(fstr);
str_cat(str,", ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_COMMA+1));
str_free(fstr);
str_cat(str,"))");
numeric = 1;
break;
case OMATCH:
str = str_new(0);
prec = P_ANDAND;
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MATCH+1));
str_free(fstr);
str_cat(str," =~ ");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MATCH+1));
str_free(fstr);
str_cat(str," ? scalar($RLENGTH = length($&), $RSTART = length($`)+1) : 0");
numeric = 1;
break;
case OUSERDEF:
str = str_new(0);
subretnum = FALSE;
fstr=walk(1,level-1,ops[node+2].ival,&numarg,P_MIN);
curargs = str_new(0);
str_sset(curargs,fstr);
str_cat(curargs,",");
tmp2str=walk(1,level,ops[node+5].ival,&numarg,P_MIN);
str_free(curargs);
curargs = NULL;
level--;
subretnum |= numarg;
s = NULL;
t = tmp2str->str_ptr;
while ((t = instr(t,"return ")))
s = t++;
if (s) {
i = 0;
for (t = s+7; *t; t++) {
if (*t == ';' || *t == '}')
i++;
}
if (i == 1) {
strcpy(s,s+7);
tmp2str->str_cur -= 7;
}
}
str_set(str,"\n");
tab(str,level);
str_cat(str,"sub ");
str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
str_cat(str," {\n");
tab(str,++level);
if (fstr->str_cur) {
str_cat(str,"local(");
str_scat(str,fstr);
str_cat(str,") = @_;");
}
str_free(fstr);
str_scat(str,fstr=walk(1,level,ops[node+3].ival,&numarg,P_MIN));
str_free(fstr);
fixtab(str,level);
str_scat(str,fstr=walk(1,level,ops[node+4].ival,&numarg,P_MIN));
str_free(fstr);
fixtab(str,level);
str_scat(str,tmp2str);
str_free(tmp2str);
fixtab(str,--level);
str_cat(str,"}\n");
tab(str,level);
str_scat(subs,str);
str_set(str,"");
str_cat(tmpstr,"(");
tmp2str = str_new(0);
if (subretnum)
str_set(tmp2str,"1");
hstore(symtab,tmpstr->str_ptr,tmp2str);
str_free(tmpstr);
level++;
break;
case ORETURN:
str = str_new(0);
if (len > 0) {
str_cat(str,"return ");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_UNI+1));
str_free(fstr);
if (numarg)
subretnum = TRUE;
}
else
str_cat(str,"return");
break;
case OUSERFUN:
str = str_new(0);
str_set(str,"&");
str_scat(str,fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,"(");
tmpstr = hfetch(symtab,str->str_ptr+3);
if (tmpstr && tmpstr->str_ptr)
numeric |= atoi(tmpstr->str_ptr);
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
str_free(fstr);
str_cat(str,")");
break;
case OGSUB:
case OSUB: {
int gsub = type == OGSUB ? 1 : 0;
str = str_new(0);
tmpstr = str_new(0);
i = 0;
if (len == 3) {
tmpstr = walk(1,level,ops[node+3].ival,&numarg,P_MATCH+1);
if (strNE(tmpstr->str_ptr,"$_")) {
str_cat(tmpstr, " =~ s");
i++;
}
else
str_set(tmpstr, "s");
}
else
str_set(tmpstr, "s");
type = ops[ops[node+2].ival].ival;
len = type >> 8;
type &= 255;
tmp3str = str_new(0);
{
const char *s;
if (type == OSTR) {
tmp2str=walk(1,level,ops[ops[node+2].ival+1].ival,&numarg,P_MIN);
for (t = tmp2str->str_ptr, d=tokenbuf; *t; d++,t++) {
if (*t == '&')
*d++ = '$' + (char)128;
else if (*t == '$' || *t == '/')
*d++ = '\\' + (char)128;
*d = *t + 128;
}
*d = '\0';
str_set(tmp2str,tokenbuf);
s = (gsub ? "/g" : "/");
}
else {
tmp2str=walk(1,level,ops[node+2].ival,&numarg,P_MIN);
str_set(tmp3str,"($s_ = '\"'.(");
str_scat(tmp3str,tmp2str);
str_cat(tmp3str,").'\"') =~ s/&/\\$&/g, ");
str_set(tmp2str,"eval $s_");
s = (gsub ? "/ge" : "/e");
i++;
}
str_cat(tmp2str,s);
}
type = ops[ops[node+1].ival].ival;
len = type >> 8;
type &= 255;
fstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN);
if (type == OREGEX) {
if (useval && i)
str_cat(str,"(");
str_scat(str,tmp3str);
str_scat(str,tmpstr);
str_scat(str,fstr);
str_scat(str,tmp2str);
}
else if ((type == OFLD && !split_to_array) || (type == OVAR && len == 1)) {
if (useval && i)
str_cat(str,"(");
str_scat(str,tmp3str);
str_scat(str,tmpstr);
str_cat(str,"/");
str_scat(str,fstr);
str_cat(str,"/");
str_scat(str,tmp2str);
}
else {
i++;
if (useval)
str_cat(str,"(");
str_cat(str,"$s = ");
str_scat(str,fstr);
str_cat(str,", ");
str_scat(str,tmp3str);
str_scat(str,tmpstr);
str_cat(str,"/$s/");
str_scat(str,tmp2str);
}
if (useval && i)
str_cat(str,")");
str_free(fstr);
str_free(tmpstr);
str_free(tmp2str);
str_free(tmp3str);
numeric = 1;
break; }
case ONUM:
str = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
numeric = 1;
break;
case OSTR:
tmpstr = walk(1,level,ops[node+1].ival,&numarg,P_MIN);
{
const char *s = "'";
for (t = tmpstr->str_ptr, d=tokenbuf; *t; d++,t++) {
if (*t == '\'')
s = "\"";
else if (*t == '\\') {
s = "\"";
*d++ = *t++ + 128;
switch (*t) {
case '\\': case '"': case 'n': case 't': case '$':
break;
default: /* hide this from perl */
*d++ = '\\' + (char)128;
}
}
*d = *t + 128;
}
*d = '\0';
str = str_new(0);
str_set(str,s);
str_cat(str,tokenbuf);
str_free(tmpstr);
str_cat(str,s);
}
break;
case ODEFINED:
prec = P_UNI;
str = str_new(0);
str_set(str,"defined $");
goto addvar;
case ODELETE:
str = str_new(0);
str_set(str,"delete $");
goto addvar;
case OSTAR:
str = str_new(0);
str_set(str,"*");
goto addvar;
case OVAR:
str = str_new(0);
str_set(str,"$");
addvar:
str_scat(str,tmpstr=walk(1,level,ops[node+1].ival,&numarg,P_MIN));
if (len == 1) {
tmp2str = hfetch(symtab,tmpstr->str_ptr);
if (tmp2str && atoi(tmp2str->str_ptr))
numeric = 2;
if (strEQ(str->str_ptr,"$FNR")) {
numeric = 1;
saw_FNR++;
str_set(str,"($.-$FNRbase)");
}
else if (strEQ(str->str_ptr,"$NR")) {
numeric = 1;
str_set(str,"$.");
}
else if (strEQ(str->str_ptr,"$NF")) {
numeric = 1;
str_set(str,"($#Fld+1)");
}
else if (strEQ(str->str_ptr,"$0"))
str_set(str,"$_");
else if (strEQ(str->str_ptr,"$ARGC"))
str_set(str,"($#ARGV+2)");
}
else {
#ifdef NOTDEF
if (curargs) {
sprintf(tokenbuf,"$%s,",tmpstr->str_ptr);
??? if (instr(curargs->str_ptr,tokenbuf))
str_cat(str,"\377"); /* can't translate yet */
}
#endif
str_cat(tmpstr,"[]");
tmp2str = hfetch(symtab,tmpstr->str_ptr);
if (tmp2str && atoi(tmp2str->str_ptr))
str_cat(str,"[(");
else
str_cat(str,"{");
str_scat(str,fstr=walk(1,level,ops[node+2].ival,&numarg,P_MIN));
str_free(fstr);
if (strEQ(str->str_ptr,"$ARGV[0")) {
str_set(str,"$ARGV0");
saw_argv0++;
}
else {
if (tmp2str && atoi(tmp2str->str_ptr))
strcpy(tokenbuf,")-1]");
else
strcpy(tokenbuf,"}");