/*
 * Copyright (c) 2000 Peter 'Luna' Runestig <peter@runestig.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifi-
 * cation, are permitted provided that the following conditions are met:
 *
 *    o Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *
 *    o Redistributions in binary form must reproduce the above copyright no-
 *      tice, this list of conditions and the following disclaimer in the do-
 *      cumentation and/or other materials provided with the distribution.
 *
 *    o The names of the contributors may not be used to endorse or promote
 *      products derived from this software without specific prior written
 *      permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LI-
 * ABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUEN-
 * TIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEV-
 * ER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABI-
 * LITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdlib.h>
#include <stdio.h>

#define STEP 128

char *fgetln(FILE *stream, size_t *len)
/* unlike the BSD call, the returned pointer must be free()'d */
{
    char *ret, *inp;
    size_t r, tot = 0;
    
    ret = (char *) malloc(STEP);
    if (!ret)
	return NULL;
    inp = ret;
    while ((r = fread(inp, 1, STEP, stream))) {
	char *p = inp;
	int i, found = 0;
	/* check if we read the last of the file */
	if (r < STEP) {
	    /* fake that we found it */
	    found = 1;
	    i = r - 1;
	} else
	    for (i = 0; i < r; i++)
		if (*p++ == '\n') {
		    found = 1;
		    break;
		}
	if (found) {
	    *len = tot + i + 1;
	    if (r == STEP) {  /* we read too much so we must put back stream pos */
		if (r - i > 1)
		    fseek(stream, i + 1 - r, SEEK_CUR);
	    }
	    break;
	} else {
	    p = (char *) realloc(ret, tot + STEP);
	    if (!p) {
		free(ret);
		return NULL;
	    }
	    ret = p;
	    tot += r;
	    inp = ret + tot;
	}
    }
    return ret;
}