libbb/last_char_is.c


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/* vi: set sw=4 ts=4: */
/*
 * busybox library eXtended function
 *
 * Copyright (C) 2001 Larry Doolittle, <ldoolitt@recycle.lbl.gov>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "libbb.h"

/* Find out if the last character of a string matches the one given Don't
 * underrun the buffer if the string length is 0.  Also avoids a possible
 * space-hogging inline of strlen() per usage.
 */
char* last_char_is(const char *s, int c)
{
	if (s) {
		s = strrchr(s, c);
		if (s && !s[1])
			return (char*)s;
	}
	return NULL;
}