char.h

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#pragma once
 
 
#include <promeki/config.h>
#if PROMEKI_ENABLE_CORE
#include <cstdint>
#include <cstddef>
#include <promeki/namespace.h>
 
PROMEKI_NAMESPACE_BEGIN
 
class Char {
        public:
                Char() : _cp(0) {}
 
                Char(char c) : _cp(static_cast<unsigned char>(c)) {}
 
                explicit Char(char32_t cp) : _cp(cp) {}
 
                char32_t codepoint() const { return _cp; }
 
                bool isNull() const { return _cp == 0; }
 
                bool isAscii() const { return _cp < 0x80; }
 
                bool isAlpha() const;
 
                bool isDigit() const;
 
                bool isAlphaNumeric() const;
 
                bool isSpace() const;
 
                bool isUpper() const;
 
                bool isLower() const;
 
                bool isPrintable() const;
 
                bool isHexDigit() const {
                        return (_cp >= '0' && _cp <= '9') || (_cp >= 'a' && _cp <= 'f') || (_cp >= 'A' && _cp <= 'F');
                }
 
                int hexDigitValue() const {
                        if (_cp >= '0' && _cp <= '9') return _cp - '0';
                        if (_cp >= 'a' && _cp <= 'f') return 10 + _cp - 'a';
                        if (_cp >= 'A' && _cp <= 'F') return 10 + _cp - 'A';
                        return -1;
                }
 
                Char toUpper() const;
 
                Char toLower() const;
 
                size_t utf8ByteCount() const;
 
                size_t toUtf8(char *buf) const;
 
                static Char fromUtf8(const char *buf, size_t *bytesRead = nullptr);
 
                bool operator==(Char o) const { return _cp == o._cp; }
                bool operator==(char c) const { return _cp == static_cast<unsigned char>(c); }
                bool operator!=(Char o) const { return _cp != o._cp; }
                bool operator<(Char o) const { return _cp < o._cp; }
                bool operator<=(Char o) const { return _cp <= o._cp; }
                bool operator>(Char o) const { return _cp > o._cp; }
                bool operator>=(Char o) const { return _cp >= o._cp; }
 
        private:
                char32_t _cp;
};
 
PROMEKI_NAMESPACE_END
 
#endif // PROMEKI_ENABLE_CORE