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#include "substdio.h"
#include "str.h"
#include "byte.h"
#include "error.h"
static int allwrite(op,fd,buf,len)
register int (*op)();
register int fd;
register char *buf;
register int len;
{
register int w;
while (len) {
w = op(fd,buf,len);
if (w == -1) {
if (errno == error_intr) continue;
return -1; /* note that some data may have been written */
}
if (w == 0) ; /* luser's fault */
buf += w;
len -= w;
}
return 0;
}
int substdio_flush(s)
register substdio *s;
{
register int p;
p = s->p;
if (!p) return 0;
s->p = 0;
return allwrite(s->op,s->fd,s->x,p);
}
int substdio_bput(s,buf,len)
register substdio *s;
register char *buf;
register int len;
{
register int n;
while (len > (n = s->n - s->p)) {
byte_copy(s->x + s->p,n,buf); s->p += n; buf += n; len -= n;
if (substdio_flush(s) == -1) return -1;
}
/* now len <= s->n - s->p */
byte_copy(s->x + s->p,len,buf);
s->p += len;
return 0;
}
int substdio_put(s,buf,len)
register substdio *s;
register char *buf;
register int len;
{
register int n;
n = s->n;
if (len > n - s->p) {
if (substdio_flush(s) == -1) return -1;
/* now s->p == 0 */
if (n < SUBSTDIO_OUTSIZE) n = SUBSTDIO_OUTSIZE;
while (len > s->n) {
if (n > len) n = len;
if (allwrite(s->op,s->fd,buf,n) == -1) return -1;
buf += n;
len -= n;
}
}
/* now len <= s->n - s->p */
byte_copy(s->x + s->p,len,buf);
s->p += len;
return 0;
}
int substdio_putflush(s,buf,len)
register substdio *s;
register char *buf;
register int len;
{
if (substdio_flush(s) == -1) return -1;
return allwrite(s->op,s->fd,buf,len);
}
int substdio_bputs(s,buf)
register substdio *s;
register char *buf;
{
return substdio_bput(s,buf,str_len(buf));
}
int substdio_puts(s,buf)
register substdio *s;
register char *buf;
{
return substdio_put(s,buf,str_len(buf));
}
int substdio_putsflush(s,buf)
register substdio *s;
register char *buf;
{
return substdio_putflush(s,buf,str_len(buf));
}
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