getline.c

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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

/* CHANGED FOR VMS */

/*
 * <getline.c>
**
** HISTORY:
**	 8 Jul 94  FM	Include "HTUtils.h" for memory allocation and free()
**			substitutions with VAXC on VMS.
**
*/

#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "HTUtils.h"

/* Read up to (and including) a newline from STREAM into *LINEPTR
   (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
   NULL), pointing to *N characters of space.  It is realloc'd as
   necessary.  Returns the number of characters read (not including the
   null terminator), or -1 on error or EOF.  */

int getline(char **lineptr, size_t *n, FILE *stream)
{
static char line[256];
char *ptr;
unsigned int len;

   if (lineptr == NULL || n == NULL)
   {
      errno = EINVAL;
      return -1;
   }

   if (ferror (stream))
      return -1;

   if (feof(stream))
      return -1;
     
   fgets(line,256,stream);

   ptr = strchr(line,'\n');   
   if (ptr)
      *ptr = '\0';

   len = strlen(line);
   
   if ((len+1) < 256)
   {
      ptr = realloc(*lineptr, 256);
      if (ptr == NULL)
         return(-1);
      *lineptr = ptr;
      *n = 256;
   }

   strcpy(*lineptr,line); 
   return(len);
}