libowfat/buffer/buffer_flush.c

#include "buffer.h"

extern ssize_t buffer_stubborn(ssize_t (*op)(),int fd,const char* buf, size_t len,void* cookie);

extern int buffer_flush(buffer* b) {
  register size_t p;
  register ssize_t r;
  if (!(p=b->p)) return 0; /* buffer already empty */
  b->p=0;
  r=buffer_stubborn(b->op,b->fd,b->x,p,b);
  if (r>0) r=0;
  return (int)r;
}