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/* Public domain. */
#include "buffer.h"
#include "str.h"
#include "byte.h"
#include "error.h"
static int allwrite(int (*op)(),int fd,const char *buf,unsigned int len)
{
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 buffer_flush(buffer *s)
{
int p;
p = s->p;
if (!p) return 0;
s->p = 0;
return allwrite(s->op,s->fd,s->x,p);
}
int buffer_putalign(buffer *s,const char *buf,unsigned int len)
{
unsigned 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 (buffer_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 buffer_put(buffer *s,const char *buf,unsigned int len)
{
unsigned int n;
n = s->n;
if (len > n - s->p) {
if (buffer_flush(s) == -1) return -1;
/* now s->p == 0 */
if (n < BUFFER_OUTSIZE) n = BUFFER_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 buffer_putflush(buffer *s,const char *buf,unsigned int len)
{
if (buffer_flush(s) == -1) return -1;
return allwrite(s->op,s->fd,buf,len);
}
int buffer_putsalign(buffer *s,const char *buf)
{
return buffer_putalign(s,buf,str_len(buf));
}
int buffer_puts(buffer *s,const char *buf)
{
return buffer_put(s,buf,str_len(buf));
}
int buffer_putsflush(buffer *s,const char *buf)
{
return buffer_putflush(s,buf,str_len(buf));
}
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