#include "byte.h"
#include "stralloc.h"
#include "buffer.h"
#include <errno.h>

int buffer_get_token_sa_pred(buffer* b,stralloc* sa,sa_predicate p) {
  for (;;) {
    char x;
    if (!stralloc_readyplus(sa,1)) return -1;
    switch  (buffer_getc(b,&x)) {
    case -1: return -1;
    case 0: return 0;
    }
    stralloc_append(sa,&x);
    switch (p(sa)) {
    case -1: return -1;
    case 0: break;
    case 1: return 0;
    }
  }
}