Character.h

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#pragma once
 
#include <cwctype>
 
#include <string>
 
#include <tdme/tdme.h>
#include <tdme/utilities/fwd-tdme.h>
 
using std::string;
 
/**
 * Character class
 * @author Andreas Drewke
 */
class tdme::utilities::Character final
{
public:
 
    /**
     * Convert character to lower case character
     * @param character character
     * @return lower case character
     */
    inline static uint32_t toLowerCase(uint32_t character) {
        return towlower(character);
    }
 
    /**
     * Convert character to upper case character
     * @param character character
     * @return upper case character
     */
    inline static uint32_t toUpperCase(uint32_t character) {
        return towupper(character);
    }
 
    /**
     * Returns if character is alpha numeric
     * @return if character is alpha numeric
     */
    inline static bool isAlphaNumeric(uint32_t character) {
        return iswalnum(character) != 0;
    }
 
    /**
     * Returns if character is a white space
     * @return if character is a white space
     */
    inline static bool isSpace(uint32_t character) {
        return iswspace(character) != 0;
    }
 
    /**
     * Generates a string from given character / code point
     * @param character character
     * @return string representation of given character
     */
    inline static const string toString(uint32_t character) {
        string string;
        appendToString(string, character);
        return string;
    }
 
    /**
     * Appends a character / code point to given string
     * @param string string
     * @param character character
     */
    inline static void appendToString(string& string, uint32_t character) {
        // see: http://www.zedwood.com/article/cpp-utf8-char-to-codepoint
        if (character <= 0x7F) {
            string+= character;
        } else if (character <= 0x7FF) {
            string+= (character >> 6) + 192;
            string+= (character & 63) + 128;
        } else if (0xd800 <= character && character <= 0xdfff) {
        } //invalid block of utf8
        else if (character <= 0xFFFF) {
            string+= (character >> 12) + 224;
            string+= ((character >> 6) & 63) + 128;
            string+= (character & 63) + 128;
        } else if (character <= 0x10FFFF) {
            string+= (character >> 18) + 240;
            string+= ((character >> 12) & 63) + 128;
            string+= ((character >> 6) & 63) + 128;
            string+= (character & 63) + 128;
        }
    }
 
};