Add custom upper<->lowercase translation tables for better localization support.

Translation tables by Henrik Holst.

BBGE/Base.cpp

@@ -152,6 +152,60 @@ unsigned hash(const std::string &string)
 
 /* hash * 33 + c */
 
+
+static unsigned char lowerToUpperTable[256];
+static unsigned char upperToLowerTable[256];
+
+void initCharTranslationTables(const std::map<unsigned char, unsigned char>& tab)
+{
+	for (unsigned int i = 0; i < 256; ++i)
+	{
+		lowerToUpperTable[i] = i;
+		upperToLowerTable[i] = i;
+	}
+	for (unsigned char i = 'a'; i <= 'z'; ++i)
+	{
+		lowerToUpperTable[i] = i - 'a' + 'A';
+		upperToLowerTable[i - 'a' + 'A'] = i;
+	}
+
+	for (std::map<unsigned char, unsigned char>::const_iterator it = tab.begin(); it != tab.end(); ++it)
+	{
+		lowerToUpperTable[it->first] = it->second;
+		upperToLowerTable[it->second] = it->first;
+	}
+}
+
+struct TransatableStaticInit
+{
+	TransatableStaticInit()
+	{
+		std::map<unsigned char, unsigned char> dummy;
+		initCharTranslationTables(dummy);
+	}
+};
+static TransatableStaticInit _transtable_static_init;
+
+static unsigned char charIsUpper(unsigned char c)
+{
+	return c == upperToLowerTable[c];
+}
+
+static unsigned char charIsLower(unsigned char c)
+{
+	return c == lowerToUpperTable[c];
+}
+
+static unsigned char charToLower(unsigned char c)
+{
+	return upperToLowerTable[c];
+}
+
+static unsigned char charToUpper(unsigned char c)
+{
+	return lowerToUpperTable[c];
+}
+
 std::string splitCamelCase(const std::string &input)
 {
 	std::string result;
@@ -160,7 +214,7 @@ std::string splitCamelCase(const std::string &input)
 	{
 		if (last == 1)
 		{
-			if (input[i] >= 'A' && input[i] <= 'Z')
+			if (charIsUpper(input[i]))
 			{
 				result += ' ';
 			}
@@ -168,7 +222,7 @@ std::string splitCamelCase(const std::string &input)
 
 		result += input[i];
 
-		if (input[i] >= 'A' && input[i] <= 'Z')
+		if (charIsUpper(input[i]))
 		{
 			last = 2;
 		}
@@ -201,22 +255,6 @@ bool isVectorInRect(const Vector &vec, const Vector &coord1, const Vector &coord
 	return (vec.x > coord1.x && vec.x < coord2.x && vec.y > coord1.y && vec.y < coord2.y);
 }
 
-static char charToUpper(char c)
-{
-	if (c >= 'a' && c <= 'z') c = c - 'a' + 'A';
-	if ((unsigned char)c >= 0xE0 && (unsigned char)c <= 0xFF)
-		c = c - 0xE0 + 0xC0;
-	return c;
-}
-
-static char charToLower(char c)
-{
-	if (c >= 'A' && c <= 'Z') c = c-'A' + 'a';
-	if ((unsigned char)c >= 0xC0 && (unsigned char)c <= 0xDF)
-		c = c-0xC0+0xE0;
-	return c;
-}
-
 void stringToUpper(std::string &s)
 {
 	for (int i = 0; i < s.size(); i++)

BBGE/Base.h

@@ -204,6 +204,7 @@ struct IntPair
 std::string numToZeroString(int num, int zeroes);
 bool chance(int perc);
 bool chancef(float p);
+void initCharTranslationTables(const std::map<unsigned char, unsigned char>& tab);
 void stringToUpper(std::string &s);
 void stringToLower(std::string &s);
 void stringToLowerUserData(std::string &s);

BBGE/Core.cpp

@@ -1293,6 +1293,8 @@ void Core::init()
 
 	initInputCodeMap();
 
+	initLocalization();
+
 	//glfwSetWindowSizeCallback(lockWindowSize);
 }
 
@@ -5164,3 +5166,23 @@ void Core::setupFileAccess()
 	debugLog("Done");
 #endif
 }
+
+void Core::initLocalization()
+{
+	InStream in(localisePath("data/localecase.txt"));
+	if(!in)
+	{
+		debugLog("data/localecase.txt does not exist, using internal locale data");
+		return;
+	}
+
+	std::string low, up;
+	std::map<unsigned char, unsigned char> trans;
+	while(in)
+	{
+		in >> low >> up;
+		trans[low[0]] = up[0];
+	}
+	initCharTranslationTables(trans);
+}
+

BBGE/Core.h

@@ -1310,6 +1310,8 @@ public:
 
 	virtual void onBackgroundUpdate();
 
+	void initLocalization();
+
 protected:
 
 	std::string fpsDebugString;