getdelim.c

/*
 * Copyright (c) 2009 - 2011 Miek Gieben
 * License: GPLv3(+), see LICENSE for details
 */

#include "rdup.h"

#define GETDELIM_BUFFER 128

extern int sig;

/* copied from xine-devel, same license applies
 * slightly modified to fit my needs
 */
ssize_t rdup_getdelim(char **lineptr, size_t * n, int delimiter, FILE * stream)
{
	char *p;
	int c;
	size_t len = 0;

	if (!lineptr || !n || (!*lineptr && *n))
		return -1;

	/* **lineptr is allocated */
	p = *lineptr;

	/* read characters from stream */
	while ((c = fgetc(stream)) != EOF) {
		if (sig != 0) {
			fclose(stream);
			signal_abort(sig);
		}
		if (len >= *n) {
			msg(_("Line longer than %d characters"), *n);
			return 0;
#if 0
			char *np = g_realloc(*lineptr, *n * 2);
			if (!np)
				return -1;
			p = np + (p - *lineptr);
			*lineptr = np;
			*n *= 2;
#endif
		}
		*p++ = (char)c;
		len++;
		if (delimiter == c)
			break;
	}

	/* end of file without any bytes read */
	if ((c == EOF) && (len == 0))
		return -1;

	/* trailing "\0" */
	if (len >= *n) {
		char *np = g_realloc(*lineptr, *n + 1);
		if (!np)
			return -1;
		p = np + (p - *lineptr);
		*lineptr = np;
		*n += 1;
	}
	*p = '\0';
	return len;
}