#include <string.h>
#include "buffer.h"

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

#ifndef __unlikely
#ifdef __GNUC__
#define __unlikely(x) __builtin_expect((x),0)
#else
#define __unlikely(x) (x)
#endif
#endif

int buffer_put(buffer* b,const char* buf,size_t len) {
  if (__unlikely(len>b->a-b->p)) {	/* doesn't fit */
    if (buffer_flush(b)==-1) return -1;
    if (len>b->a) {
      if (buffer_stubborn(b->op,b->fd,buf,len,b)<0) return -1;
      return 0;
    }
  }
  memcpy(b->x+b->p, buf, len);
  b->p+=len;
  return 0;
}