From 19c532a674b0a5be588b5c9ecfb1959774985d58 Mon Sep 17 00:00:00 2001
From: cherierm <cherierm@48e7efb5-ca39-0410-a469-dd3cf9ba447f>
Date: Wed, 11 Apr 2007 14:26:27 +0000
Subject: [PATCH] Strip whitespace (or other characters) of f a string

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@3371 48e7efb5-ca39-0410-a469-dd3cf9ba447f
---
 src/xbt/trim.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/xbt/trim.c

diff --git a/src/xbt/trim.c b/src/xbt/trim.c
new file mode 100644
index 0000000000..268002b0c1
--- /dev/null
+++ b/src/xbt/trim.c
@@ -0,0 +1,134 @@
+
+/* Copyright (C) 2007 Malek Cherier. All rights reserved.                  */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. 
+ */
+
+/* Returns a copy of a string without leading whitespaces (ltrim), trailing whitespaces (rtrim), 
+ * or both leading and trailing whitespaces (trim).
+ */
+  
+#include "xbt/misc.h"
+#include "xbt/sysdep.h" /* headers of these functions */
+#include "portable.h"
+
+/**  @brief Strip whitespace (or other characters) from the end of a string.
+ *
+ * The function rtrim() returns a string with whitespace stripped from the end of s. 
+ * By default (without the second parameter char_list), rtrim() will strip these characters :
+ * 	
+ *	- " "		(ASCII 32	(0x20))	space. 
+ *	- "\t"		(ASCII 9	(0x09))	tab. 
+ *	- "\n"		(ASCII 10	(0x0A))	line feed. 
+ *	- "\r"		(ASCII 13	(0x0D))	carriage return. 
+ *	- "\0"		(ASCII 0	(0x00))	NULL. 
+ *	- "\x0B"	(ASCII 11	(0x0B))	vertical tab. 
+ *
+ * @param s The string to strip.
+ * @param char_list A string which contains the characters you want to strip.
+ *
+ * @return If the specified is NULL the function returns NULL. Otherwise the
+ * function returns the string with whitespace stripped from the end.
+ */
+char*
+rtrim(char* s, const char* char_list)
+{
+	char* cur = s;
+	const char* __char_list = " \t\n\r\x0B";
+	char white_char[256] = {1,0};
+	
+	if(!s)
+		return NULL;
+
+	if(!char_list){
+		while(*__char_list) {
+			white_char[(unsigned char)*__char_list++] = 1;
+		}
+	}else{
+		while(*char_list) {
+			white_char[(unsigned char)*char_list++] = 1;
+		}
+	}
+
+	while(*cur)
+		++cur;
+
+	while(white_char[(unsigned char)*cur] && (cur >= s))
+		--cur;
+
+	*++cur = '\0';
+	return s;
+}
+
+/**  @brief Strip whitespace (or other characters) from the beginning of a string.
+ *
+ * The function ltrim() returns a string with whitespace stripped from the beginning of s. 
+ * By default (without the second parameter char_list), ltrim() will strip these characters :
+ * 	
+ *	- " "		(ASCII 32	(0x20))	space. 
+ *	- "\t"		(ASCII 9	(0x09))	tab. 
+ *	- "\n"		(ASCII 10	(0x0A))	line feed. 
+ *	- "\r"		(ASCII 13	(0x0D))	carriage return. 
+ *	- "\0"		(ASCII 0	(0x00))	NULL. 
+ *	- "\x0B"	(ASCII 11	(0x0B))	vertical tab. 
+ *
+ * @param s The string to strip.
+ * @param char_list A string which contains the characters you want to strip.
+ *
+ * @return If the specified is NULL the function returns NULL. Otherwise the
+ * function returns the string with whitespace stripped from the beginning.
+ */
+char*
+ltrim( char* s, const char* char_list)
+{
+	char* cur = s;
+	const char* __char_list = " \t\n\r\x0B";
+	char white_char[256] = {1,0};
+	
+	if(!s)
+		return NULL;
+
+	if(!char_list){
+		while(*__char_list) {
+			white_char[(unsigned char)*__char_list++] = 1;
+		}
+	}else{
+		while(*char_list) {
+			white_char[(unsigned char)*char_list++] = 1;
+		}
+	}
+
+	while(*cur && white_char[(unsigned char)*cur])
+		++cur;
+
+	return strcpy(s,cur);
+}
+
+/**  @brief Strip whitespace (or other characters) from the end and the begining of a string.
+ *
+ * The function trim() returns a string with whitespace stripped from the end and the begining of s. 
+ * By default (without the second parameter char_list), trim() will strip these characters :
+ * 	
+ *	- " "		(ASCII 32	(0x20))	space. 
+ *	- "\t"		(ASCII 9	(0x09))	tab. 
+ *	- "\n"		(ASCII 10	(0x0A))	line feed. 
+ *	- "\r"		(ASCII 13	(0x0D))	carriage return. 
+ *	- "\0"		(ASCII 0	(0x00))	NULL. 
+ *	- "\x0B"	(ASCII 11	(0x0B))	vertical tab. 
+ *
+ * @param s The string to strip.
+ * @param char_list A string which contains the characters you want to strip.
+ *
+ * @return If the specified is NULL the function returns NULL. Otherwise the
+ * function returns the string with whitespace stripped from the end and the begining.
+ */
+char* 
+trim(char* s, const char* char_list ){
+	
+	if(!s)
+		return NULL;
+		
+    return ltrim(rtrim(s,char_list),char_list);
+}
+   
\ No newline at end of file
-- 
2.20.1