text: 
  
  /* GNU Mailutils -- a suite of utilities for electronic mail
     Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
  
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
  
     This library 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
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA  */
  
  /* First implementation by Alain Magloire */
  
  /* Modified by Hanchuan Peng to make the code useable for Max OS.
     last revision: 01/26/2006
  */
  
  
  #ifdef HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  //#include <unistd.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "gnu_getline.h"
  
  ssize_t
  gnu_getline (char **lineptr, size_t *n, FILE *stream)
  {
    return gnu_getdelim (lineptr, n, '\n', stream);
  }
  
  #ifndef HAVE_GETDELIM
  
  /* Default value for line length.  */
  static const int line_size = 128;
  
  ssize_t
  gnu_getdelim (char **lineptr, size_t *n, int delim, FILE *stream)
  {
    int indx = 0;
    int c;
  
    /* Sanity checks.  */
    if (lineptr == NULL || n == NULL || stream == NULL)
      return -1;
  
    /* Allocate the line the first time.  */
    if (*lineptr == NULL)
      {
        *lineptr = (char *)malloc (line_size);
        if (*lineptr == NULL)
  	return -1;
        *n = line_size;
      }
  
    while ((c = getc (stream)) != EOF)
      {
        /* Check if more memory is needed.  */
        if (indx >= *n)
  	{
  	  *lineptr = (char *)realloc (*lineptr, *n + line_size);
  	  if (*lineptr == NULL)
  	    return -1;
  	  *n += line_size;
  	}
  
        /* Push the result in the line.  */
        (*lineptr)[indx++] = c;
  
        /* Bail out.  */
        if (c == delim)
  	break;
      }
  
    /* Make room for the null character.  */
    if (indx >= *n)
      {
        *lineptr = (char *)realloc (*lineptr, *n + line_size);
        if (*lineptr == NULL)
         return -1;
        *n += line_size;
      }
  
    /* Null terminate the buffer.  */
    (*lineptr)[indx++] = 0;
  
    /* The last line may not have the delimiter, we have to
     * return what we got and the error will be seen on the
     * next iteration.  */
    return (c == EOF && (indx - 1) == 0) ? -1 : indx - 1;
  }
  
  #endif /* HAVE_GETDELIM */
  
  
  #ifdef STANDALONE
  int main(void)
  {
    FILE * fp;
    char * line = NULL;
    size_t len = 0;
    ssize_t read;
    fp = fopen("/etc/passwd", "r");
    if (fp == NULL)
      exit(EXIT_FAILURE);
    while ((read = gnu_getline(&line, &len, fp)) != -1) {
      printf("Retrieved line of length %zu :\n", read);
      printf("%s", line);
    }
    if (line)
      free(line);
    return EXIT_SUCCESS;
  }
  #endif
  
  
  