util/DivideString: add option "strip"

src/output/plugins/AoOutputPlugin.cxx

@@ -128,7 +128,7 @@ AoOutput::Configure(const config_param &param, Error &error)
 	value = param.GetBlockValue("options", nullptr);
 	if (value != nullptr) {
 		for (const auto &i : SplitString(value, ';')) {
-			const DivideString ss(i.c_str(), '=');
+			const DivideString ss(i.c_str(), '=', true);
 
 			if (!ss.IsDefined()) {
 				error.Format(ao_output_domain,

src/util/DivideString.cxx

@@ -18,10 +18,11 @@
  */
 
 #include "DivideString.hxx"
+#include "StringUtil.hxx"
 
 #include <string.h>
 
-DivideString::DivideString(const char *s, char separator)
+DivideString::DivideString(const char *s, char separator, bool strip)
 	:first(nullptr)
 {
 	const char *x = strchr(s, separator);
@@ -31,6 +32,16 @@ DivideString::DivideString(const char *s, char separator)
 	size_t length = x - s;
 	second = x + 1;
 
+	if (strip)
+		second = StripLeft(second);
+
+	if (strip) {
+		const char *end = s + length;
+		s = StripLeft(s);
+		end = StripRight(s, end);
+		length = end - s;
+	}
+
 	first = new char[length + 1];
 	memcpy(first, s, length);
 	first[length] = 0;

src/util/DivideString.hxx

@@ -33,7 +33,11 @@ class DivideString {
 	const char *second;
 
 public:
-	DivideString(const char *s, char separator);
+	/**
+	 * @param strip strip the first part and left-strip the second
+	 * part?
+	 */
+	DivideString(const char *s, char separator, bool strip=false);
 
 	~DivideString() {
 		delete[] first;

test/DivideStringTest.hxx

@@ -15,6 +15,7 @@ class DivideStringTest : public CppUnit::TestFixture {
 	CPPUNIT_TEST(TestBasic);
 	CPPUNIT_TEST(TestEmpty);
 	CPPUNIT_TEST(TestFail);
+	CPPUNIT_TEST(TestStrip);
 	CPPUNIT_TEST_SUITE_END();
 
 public:
@@ -41,4 +42,13 @@ public:
 		const DivideString ds(input, '.');
 		CPPUNIT_ASSERT(!ds.IsDefined());
 	}
+
+	void TestStrip() {
+		constexpr char input[] = " foo\t.\nbar\r";
+		const DivideString ds(input, '.', true);
+		CPPUNIT_ASSERT(ds.IsDefined());
+		CPPUNIT_ASSERT(!ds.IsEmpty());
+		CPPUNIT_ASSERT_EQUAL(0, strcmp(ds.GetFirst(), "foo"));
+		CPPUNIT_ASSERT_EQUAL(input + 7, ds.GetSecond());
+	}
 };