#include "getln.h"

#include "byte.h"

/**
  @file getln.c
  @author djb
  @ref qmail
  @brief evaluating tokenized input arguments
*/

int getln(buffer *b, stralloc *sa, int *match, int sep)
{
  char *cont;
  unsigned int clen;

  if (sgetln(b, sa, &cont, &clen, sep) == -1) return -1;
  if (!clen) {
    *match = 0;
    return 0;
  }
  if (!stralloc_catb(sa, cont, clen)) return -1;
  *match = 1;
  return 0;
}

int sgetln(buffer *b, stralloc *sa, char **cont, unsigned int *clen, int sep)
{
  char *x;
  unsigned int i;
  int n;

  if (!stralloc_ready(sa, 0)) return -1;
  sa->len = 0;

  for (;;) {
    n = buffer_feed(b);
    if (n < 0) return -1;
    if (n == 0) {
      *clen = 0;
      return 0;
    }
    x = buffer_PEEK(b);
    i = byte_chr(x, n, sep);
    if (i < n) {
      buffer_SEEK(b, *clen = i + 1);
      *cont = x;
      return 0;
    }
    if (!stralloc_readyplus(sa, n)) return -1;
    i = sa->len;
    sa->len = i + buffer_get(b, sa->s + i, n);
  }
}