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