Added String::trim() method

svn-id: r33203

3 files changed, 28 insertions, 0 deletions

diff --git a/common/str.cpp b/common/str.cpp
index a2e6e0c66d..f7cb84aa05 100644
--- a/common/str.cpp
+++ b/common/str.cpp
@@ -363,6 +363,26 @@ void String::ensureCapacity(uint32 new_len, bool keep_old) {
 	}
 }
 
+void String::trim() {
+	if (_len == 0)
+		return;
+
+	// Trim trailing whitespace
+	while (_len >= 1 && isspace(_str[_len-1]))
+		_len--;
+	_str[_len] = 0;
+
+	// Trim leading whitespace
+	char *t = _str;
+	while (isspace(*t))
+		t++;
+
+	if (t != _str) {
+		_len -= t - _str;
+		memmove(_str, t, _len + 1);
+	}
+}
+
 uint String::hash() const {
 	return hashit(c_str());
 }
diff --git a/common/str.h b/common/str.h
index ae9cb992b6..619d295f14 100644
--- a/common/str.h
+++ b/common/str.h
@@ -177,6 +177,8 @@ public:
 	void toLowercase();
 	void toUppercase();
 	
+	void trim();
+
 	uint hash() const;
 
 public:
diff --git a/test/common/str.h b/test/common/str.h
index 76574ea70f..e9a6eae422 100644
--- a/test/common/str.h
+++ b/test/common/str.h
@@ -16,6 +16,12 @@ class StringTestSuite : public CxxTest::TestSuite
 		TS_ASSERT( str == "str" );
 	}
 
+	void test_trim(void) {
+		Common::String str("  This is a s tring with spaces  ");
+		str.trim();
+		TS_ASSERT( str == "This is a s tring with spaces" );
+	}
+
 	void test_empty_clear(void) {
 		Common::String str("test");
 		TS_ASSERT( !str.empty() );