text: /* getdelim.c --- Implementation of replacement getdelim function.
     Copyright (C) 1994, 1996, 1997, 1998, 2001, 2003, 2005, 2006, 2007, 2008,
     2009, 2010 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public License as
     published by the Free Software Foundation; either version 3, or (at
     your option) any later version.
  
     This program is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
     02110-1301, USA.  */
  
  /* Ported from glibc by Simon Josefsson. */
  
  #include <config.h>
  
  /* Don't use __attribute__ __nonnull__ in this compilation unit.  Otherwise gcc
     optimizes away the lineptr == NULL || n == NULL || fp == NULL tests below.  */
  #define _GL_ARG_NONNULL(params)
  
  #include <stdio.h>
  
  #include <limits.h>
  #include <stdint.h>
  #include <stdlib.h>
  #include <errno.h>
  
  #ifndef SSIZE_MAX
  # define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
  #endif
  
  #if USE_UNLOCKED_IO
  # include "unlocked-io.h"
  # define getc_maybe_unlocked(fp)        getc(fp)
  #elif !HAVE_FLOCKFILE || !HAVE_FUNLOCKFILE || !HAVE_DECL_GETC_UNLOCKED
  # undef flockfile
  # undef funlockfile
  # define flockfile(x) ((void) 0)
  # define funlockfile(x) ((void) 0)
  # define getc_maybe_unlocked(fp)        getc(fp)
  #else
  # define getc_maybe_unlocked(fp)        getc_unlocked(fp)
  #endif
  
  /* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
     NUL-terminate it).  *LINEPTR is a pointer returned from malloc (or
     NULL), pointing to *N characters of space.  It is realloc'ed as
     necessary.  Returns the number of characters read (not including
     the null terminator), or -1 on error or EOF.  */
  
  ssize_t
  getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp)
  {
    ssize_t result;
    size_t cur_len = 0;
  
    if (lineptr == NULL || n == NULL || fp == NULL)
      {
        errno = EINVAL;
        return -1;
      }
  
    flockfile (fp);
  
    if (*lineptr == NULL || *n == 0)
      {
        char *new_lineptr;
        *n = 120;
        new_lineptr = (char *) realloc (*lineptr, *n);
        if (new_lineptr == NULL)
          {
            result = -1;
            goto unlock_return;
          }
        *lineptr = new_lineptr;
      }
  
    for (;;)
      {
        int i;
  
        i = getc_maybe_unlocked (fp);
        if (i == EOF)
          {
            result = -1;
            break;
          }
  
        /* Make enough space for len+1 (for final NUL) bytes.  */
        if (cur_len + 1 >= *n)
          {
            size_t needed_max =
              SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
            size_t needed = 2 * *n + 1;   /* Be generous. */
            char *new_lineptr;
  
            if (needed_max < needed)
              needed = needed_max;
            if (cur_len + 1 >= needed)
              {
                result = -1;
                errno = EOVERFLOW;
                goto unlock_return;
              }
  
            new_lineptr = (char *) realloc (*lineptr, needed);
            if (new_lineptr == NULL)
              {
                result = -1;
                goto unlock_return;
              }
  
            *lineptr = new_lineptr;
            *n = needed;
          }
  
        (*lineptr)[cur_len] = i;
        cur_len++;
  
        if (i == delimiter)
          break;
      }
    (*lineptr)[cur_len] = '\0';
    result = cur_len ? cur_len : result;
  
   unlock_return:
    funlockfile (fp); /* doesn't set errno */
  
    return result;
  }
  