std::string urlDecode()

in src/string_util.cpp [233:254]

• 22 lines of code
• 17 McCabe index (conditional complexity)

std::string urlDecode(const std::string& s)
{
    std::string result;
    for(size_t i = 0; i < s.length(); ++i){
        if(s[i] != '%'){
            result += s[i];
        }else{
            int ch = 0;
            if(s.length() <= ++i){
                break;       // wrong format.
            }
            ch += ('0' <= s[i] && s[i] <= '9') ? (s[i] - '0') : ('A' <= s[i] && s[i] <= 'F') ? (s[i] - 'A' + 0x0a) : ('a' <= s[i] && s[i] <= 'f') ? (s[i] - 'a' + 0x0a) : 0x00;
            if(s.length() <= ++i){
                break;       // wrong format.
            }
            ch *= 16;
            ch += ('0' <= s[i] && s[i] <= '9') ? (s[i] - '0') : ('A' <= s[i] && s[i] <= 'F') ? (s[i] - 'A' + 0x0a) : ('a' <= s[i] && s[i] <= 'f') ? (s[i] - 'a' + 0x0a) : 0x00;
            result += static_cast<char>(ch);
        }
    }
    return result;
}