/*-
 * Copyright (c) 1996
 *	David Parsons.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by David Parsons
 *      (orc@pell.chi.il.us)
 * 4. My name may not be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, 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.
 */
static char rcsid[] = "$Header: /home/orc/src/CVS/listmgr/getline.c,v 1.5 1996/04/23 03:32:24 orc Exp $";
/*
 * getline() fetch a line into dynamically allocated memory, dealing properly
 * with continuation header lines
 */
#include <stdio.h>
#include <malloc.h>

char *
getline(FILE *input)
{
    register c;
    static char *line;
    static int   bfrsize=0;
    int   linesize;

    if (bfrsize == 0)
	if ((line = malloc(bfrsize=160)) == (char*)0)
	    return line;

    linesize = 0;
    while ((c=getc(input)) != EOF) {
	/* get a character, checking for linewrap, and expanding the
	 * line buffer if needed
	 */
	if (c == '\n') {
	    if ((c = getc(input)) == EOF)
		break;
	    if (c != '\t' && c != ' ') {
		ungetc(c, input);
		break;
	    }
	    while (c == '\t' || c == ' ') {
		c = getc(input);
	    }
	    if (c == EOF)
		break;
	}
	line[linesize++] = c;
	if (linesize >= bfrsize) {
	    bfrsize *= 2;
	    if ((line = realloc(line, bfrsize)) == (char*)0)
		return line;
	}
    }
    line[linesize] = 0;
    return line;
} /* getline */