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#include "rc.h"
#include "exec.h"
#include "io.h"
#include "fns.h"
int pfmtnest=0;
void pfmt(io *f, char *fmt, ...){
va_list ap;
char err[ERRMAX];
va_start(ap, fmt);
pfmtnest++;
for(;*fmt;fmt++)
if(*fmt!='%') pchr(f, *fmt);
else switch(*++fmt){
case '\0': va_end(ap); return;
case 'c': pchr(f, va_arg(ap, int)); break;
case 'd': pdec(f, va_arg(ap, int)); break;
case 'o': poct(f, va_arg(ap, unsigned)); break;
case 'p': phex(f, (long)va_arg(ap, char *)); break; /*unportable*/
case 'Q': pquo(f, va_arg(ap, char *)); break;
case 'q': pwrd(f, va_arg(ap, char *)); break;
case 'r': errstr(err, sizeof err); pstr(f, err); break;
case 's': pstr(f, va_arg(ap, char *)); break;
case 't': pcmd(f, va_arg(ap, struct tree *)); break;
case 'v': pval(f, va_arg(ap, struct word *)); break;
default: pchr(f, *fmt); break;
}
va_end(ap);
if(--pfmtnest==0) flush(f);
}
void pchr(io *b, int c)
{
if(b->bufp==b->ebuf) fullbuf(b, c);
else *b->bufp++=c;
}
int rchr(io *b)
{
if(b->bufp==b->ebuf) return emptybuf(b);
return *b->bufp++ & 0xFF;
}
void pquo(io *f, char *s)
{
pchr(f, '\'');
for(;*s;s++)
if(*s=='\'') pfmt(f, "''");
else pchr(f, *s);
pchr(f, '\'');
}
void pwrd(io *f, char *s)
{
char *t;
for(t=s;*t;t++) if(!wordchr(*t)) break;
if(t==s || *t) pquo(f, s);
else pstr(f, s);
}
void phex(io *f, long p)
{
int n;
for(n=28;n>=0;n-=4) pchr(f, "0123456789ABCDEF"[(p>>n)&0xF]);
}
void pstr(io *f, char *s)
{
if(s==0) s="(null)";
while(*s) pchr(f, *s++);
}
void pdec(io *f, long n)
{
if(n<0){
n=-n;
if(n>=0){
pchr(f, '-');
pdec(f, n);
return;
}
/* n is two's complement minimum integer */
n=1-n;
pchr(f, '-');
pdec(f, n/10);
pchr(f, n%10+'1');
return;
}
if(n>9) pdec(f, n/10);
pchr(f, n%10+'0');
}
void poct(io *f, ulong n)
{
if(n>7) poct(f, n>>3);
pchr(f, (n&7)+'0');
}
void pval(io *f, word *a)
{
if(a){
while(a->next && a->next->word){
pwrd(f, a->word);
pchr(f, ' ');
a=a->next;
}
pwrd(f, a->word);
}
}
int fullbuf(io *f, int c)
{
flush(f);
return *f->bufp++=c;
}
void flush(io *f)
{
int n;
char *s;
if(f->strp){
n=f->ebuf-f->strp;
f->strp=realloc(f->strp, n+101);
if(f->strp==0) panic("Can't realloc %d bytes in flush!", n+101);
f->bufp=f->strp+n;
f->ebuf=f->bufp+100;
for(s=f->bufp;s<=f->ebuf;s++) *s='\0';
}
else{
n=f->bufp-f->buf;
if(n && Write(f->fd, f->buf, n) < 0){
Write(3, "Write error\n", 12);
if(ntrap) dotrap();
}
f->bufp=f->buf;
f->ebuf=f->buf+NBUF;
}
}
io *openfd(int fd){
io *f;
f=new(struct io);
f->fd=fd;
f->bufp=f->ebuf=f->buf;
f->strp=0;
return f;
}
io *openstr(void){
io *f=new(struct io);
char *s;
f->fd=-1;
f->bufp=f->strp=emalloc(101);
f->ebuf=f->bufp+100;
for(s=f->bufp;s<=f->ebuf;s++) *s='\0';
return f;
}
/*
* Open a corebuffer to read. EOF occurs after reading len
* characters from buf.
*/
io *opencore(char *s, int len)
{
io *f=new(struct io);
char *buf=emalloc(len);
f->fd= -1 /*open("/dev/null", 0)*/;
f->bufp=f->strp=buf;
f->ebuf=buf+len;
Memcpy(buf, s, len);
return f;
}
/*
void rewind(io *io)
{
if(io->fd==-1) io->bufp=io->strp;
else{
io->bufp=io->ebuf=io->buf;
Seek(io->fd, 0L, 0);
}
}
*/
void closeio(io *io)
{
if(io->fd>=0) close(io->fd);
if(io->strp) efree(io->strp);
efree((char *)io);
}
int emptybuf(io *f)
{
int n;
if(f->fd==-1 || (n=Read(f->fd, f->buf, NBUF))<=0) return EOF;
f->bufp=f->buf;
f->ebuf=f->buf+n;
return *f->bufp++&0xff;
}
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