view lwlib/lw_string.c @ 516:c33b4abff860

Fix bug related to parsing \x sequences under pragma cstrings Fix the test for lower case letter digits to test for the full range of hex digit values instead of just 0 to 9 when deciding to apply the correction factor for lower case.
author William Astle <lost@l-w.ca>
date Thu, 11 Feb 2021 09:25:16 -0700
parents 8e25147c2aa8
children
line wrap: on
line source

/*
lw_string.c

Copyright © 2010 William Astle

This file is part of LWTOOLS.

LWTOOLS is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 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 General Public License for
more details.

You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.
*/

#include <string.h>
#include <stdlib.h>

#include "lw_alloc.h"
#include "lw_string.h"

char *lw_strdup(const char *s)
{
	char *r;
	
	if (!s)
		s = "(null)";

	r = lw_alloc(strlen(s) + 1);
	strcpy(r, s);
	return r;
}

char *lw_strndup(const char *s, int len)
{
	char *r;
	int sl;
	
	sl = strlen(s);
	if (sl > len)
		sl = len;
	
	r = lw_alloc(sl + 1);
	memmove(r, s, sl);
	r[sl] = '\0';
	return r;
}

char *lw_token(const char *s, int sep, const char **ap)
{
	const char *p;
	char *r;

	if (!s)
		return NULL;
	
	p = strchr(s, sep);
	if (!p)
	{
		if (ap)
			*ap = NULL;
		return lw_strdup(s);
	}
	
	r = lw_alloc(p - s + 1);
	strncpy(r, (char *)s, p - s);
	r[p - s] = '\0';
	
	if (ap)
	{
		while (*p && *p == sep)
			p++;
		*ap = p;
	}
	return r;
}