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#include "rc.h"
#include "exec.h"
#include "io.h"
#include "fns.h"
struct here *here, **ehere;
int ser = 0;
char tmp[]="/tmp/here0000.0000";
char hex[]="0123456789abcdef";
void psubst(io*, char*);
void pstrs(io*, word*);
void
hexnum(char *p, int n)
{
*p++=hex[(n>>12)&0xF];
*p++=hex[(n>>8)&0xF];
*p++=hex[(n>>4)&0xF];
*p = hex[n&0xF];
}
tree*
heredoc(tree *tag)
{
struct here *h = new(struct here);
if(tag->type!=WORD)
yyerror("Bad here tag");
h->next = 0;
if(here)
*ehere = h;
else
here = h;
ehere=&h->next;
h->tag = tag;
hexnum(&tmp[9], getpid());
hexnum(&tmp[14], ser++);
h->name = strdup(tmp);
return token(tmp, WORD);
}
/*
* bug: lines longer than NLINE get split -- this can cause spurious
* missubstitution, or a misrecognized EOF marker.
*/
#define NLINE 4096
void
readhere(void)
{
struct here *h, *nexth;
io *f;
char *s, *tag;
int c, subst;
char line[NLINE+1];
for(h = here;h;h = nexth){
subst=!h->tag->quoted;
tag = h->tag->str;
c = Creat(h->name);
if(c<0)
yyerror("can't create here document");
f = openfd(c);
s = line;
pprompt();
while((c = rchr(runq->cmdfd))!=EOF){
if(c=='\n' || s==&line[NLINE]){
*s='\0';
if(tag && strcmp(line, tag)==0) break;
if(subst)
psubst(f, line);
else pstr(f, line);
s = line;
if(c=='\n'){
pprompt();
pchr(f, c);
}
else *s++=c;
}
else *s++=c;
}
flush(f);
closeio(f);
cleanhere(h->name);
nexth = h->next;
efree((char *)h);
}
here = 0;
doprompt = 1;
}
void
psubst(io *f, char *s)
{
char *t, *u;
int savec, n;
word *star;
while(*s){
if(*s!='$'){
if(0xa0<=(*s&0xff) && (*s&0xff)<=0xf5){
pchr(f, *s++);
if(*s=='\0')
break;
}
else if(0xf6<=(*s&0xff) && (*s&0xff)<=0xf7){
pchr(f, *s++);
if(*s=='\0')
break;
pchr(f, *s++);
if(*s=='\0')
break;
}
pchr(f, *s++);
}
else{
t=++s;
if(*t=='$')
pchr(f, *t++);
else{
while(*t && idchr(*t)) t++;
savec=*t;
*t='\0';
n = 0;
for(u = s;*u && '0'<=*u && *u<='9';u++) n = n*10+*u-'0';
if(n && *u=='\0'){
star = vlook("*")->val;
if(star && 1<=n && n<=count(star)){
while(--n) star = star->next;
pstr(f, star->word);
}
}
else
pstrs(f, vlook(s)->val);
*t = savec;
if(savec=='^')
t++;
}
s = t;
}
}
}
void
pstrs(io *f, word *a)
{
if(a){
while(a->next && a->next->word){
pstr(f, a->word);
pchr(f, ' ');
a = a->next;
}
pstr(f, a->word);
}
}
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