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91 lines
1.9 KiB
91 lines
1.9 KiB
#include "buffer.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 int32_t allwrite(ssize_t (*op)(),int fd,char *buf,unsigned int len)
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{
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int32_t w;
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while (len)
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{
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w = (int32_t)op(fd,buf,len);
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if ( w == -1 )
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{
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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 )
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; // 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 buffer_flush(buffer *s)
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{
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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 buffer_putalign(buffer *s,char *buf,unsigned int len)
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{
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unsigned 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 (buffer_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 buffer_put(buffer *s,char *buf,unsigned int len)
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{
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unsigned int n;
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n = s->n;
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if (len > n - s->p) {
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if (buffer_flush(s) == -1) return -1;
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/* now s->p == 0 */
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if (n < BUFFER_OUTSIZE) n = BUFFER_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 buffer_putflush(buffer *s,char *buf,unsigned int len)
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{
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if (buffer_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 buffer_putsalign(buffer *s,char *buf)
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{
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return buffer_putalign(s,buf,str_len(buf));
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}
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int buffer_puts(buffer *s,char *buf)
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{
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return buffer_put(s,buf,str_len(buf));
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}
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int buffer_putsflush(buffer *s,char *buf)
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{
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return buffer_putflush(s,buf,str_len(buf));
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}
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