diff lwlib/lw_string.c @ 0:2c24602be78f

Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
author lost@l-w.ca
date Wed, 19 Jan 2011 22:27:17 -0700
parents
children 8e25147c2aa8
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlib/lw_string.c	Wed Jan 19 22:27:17 2011 -0700
@@ -0,0 +1,83 @@
+/*
+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>
+
+#define ___lw_string_c_seen___
+#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;
+}