* Added desperately missing Trim() method.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32035 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/support/String.h

@@ -1,7 +1,7 @@
 /*
-* Copyright 2001-2009, Haiku Inc. All Rights Reserved.
-* Distributed under the terms of the MIT License.
-*/
+ * Copyright 2001-2009, Haiku Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
 #ifndef __BSTRING__
 #define __BSTRING__
 
@@ -219,13 +219,17 @@ public:
 
 			// Escaping and De-escaping
 			BString&		CharacterEscape(const char* original,
-								const char* setOfCharsToEscape, char escapeWith);
+								const char* setOfCharsToEscape,
+								char escapeWith);
 			BString&		CharacterEscape(const char* setOfCharsToEscape,
 								char escapeWith);
 			BString&		CharacterDeescape(const char* original,
 								char escapeChar);
 			BString&		CharacterDeescape(char escapeChar);
 
+			// Trimming
+			BString&		Trim();
+
 			// Insert
 			BString&		operator<<(const char* string);
 			BString&		operator<<(const BString& string);

src/kits/support/String.cpp

@@ -10,6 +10,7 @@
  *		Julun <host.haiku@gmx.de>
  */
 
+
 /*! String class supporting common string operations. */
 
 
@@ -1613,6 +1614,42 @@ BString::CharacterDeescape(char escapeChar)
 }
 
 
+//	#pragma mark - Trimming
+
+
+BString&
+BString::Trim()
+{
+	const char* string = String();
+
+	int32 startCount = 0;
+	while (isspace(string[startCount])) {
+		startCount++;
+	}
+
+	int32 endCount = 0;
+	while (isspace(string[Length() - endCount - 1])) {
+		endCount++;
+	}
+
+	if (startCount == 0 && endCount == 0)
+		return *this;
+
+	// We actually need to trim
+
+	size_t length = Length() - startCount - endCount;
+	if (startCount == 0) {
+		_MakeWritable(length, true);
+	} else if (_MakeWritable() == B_OK) {
+		memmove(fPrivateData, fPrivateData + startCount, length);
+		fPrivateData[length] = '\0';
+		_SetLength(length);
+	}
+
+	return *this;
+}
+
+
 //	#pragma mark - Insert