/** getline.c - fetch a single line from a stdio stream, arbitrary length.
 * Copyright (C) 2000 Matthias Andree <matthias.andree@gmx.de>
 *
 *  This program 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 2.1 of the License, 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 Lesser General Public License for more details.
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#undef _GNU_SOURCE
#include <stdio.h>
#include <sys/types.h>
#include <string.h>
#include "leafnode.h"
#include "getline.h"
#include "critmem.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif

ssize_t
_getline(char *to, size_t size, FILE * stream)
{
    ssize_t i = 0;
    int c;

    if (1 > size)
	return -1;

    while (--size > 0 && ((c = getc(stream)) != EOF)) {
	to[i++] = c;
	if (c == '\n')
	    break;
    }
    to[i] = '\0';
    if (ferror(stream))
	return -1;
    return i;
}

/** Clean-room reimplementation of getline, API compatible with glibc2.
 *  \return 
 * - >= 0 count of characters read  
 * - -1 for EOF/error 
 */
ssize_t getline(char **pto, size_t * size, FILE * stream);
ssize_t
getline(char **pto, size_t * size, FILE * stream)
{
    ssize_t i = 0, cur = 0, off = 0;

    if (!(*size) && !(*pto)) {
	*size = 256;
	*pto = critmalloc(*size, "fgetline");
    }
    while ((cur = _getline(*pto + off, *size - off, stream)) > 0) {
	i += cur;
	if ((*pto)[i - 1] == '\n')
	    return i;
	off = i;
	*size += *size;
	*pto = critrealloc(*pto, *size, "fgetline");
    }
    if (!cur && i)
	return i;
    return -1;
}