#pragma once
#include <cstdint>
#include <string>
#include <vector>
// TODO: reimplement this structure in endian-independent way
struct unicode_cpt_flags {
enum {
UNDEFINED = 0x0001,
NUMBER = 0x0002, // regex: \p{N}
LETTER = 0x0004, // regex: \p{L}
SEPARATOR = 0x0008, // regex: \p{Z}
ACCENT_MARK = 0x0010, // regex: \p{M}
PUNCTUATION = 0x0020, // regex: \p{P}
SYMBOL = 0x0040, // regex: \p{S}
CONTROL = 0x0080, // regex: \p{C}
MASK_CATEGORIES = 0x00FF,
WHITESPACE = 0x0100,
LOWERCASE = 0x0200,
UPPERCASE = 0x0400,
NFD = 0x0800,
};
// codepoint type
uint16_t is_undefined : 1;
uint16_t is_number : 1; // regex: \p{N}
uint16_t is_letter : 1; // regex: \p{L}
uint16_t is_separator : 1; // regex: \p{Z}
uint16_t is_accent_mark : 1; // regex: \p{M}
uint16_t is_punctuation : 1; // regex: \p{P}
uint16_t is_symbol : 1; // regex: \p{S}
uint16_t is_control : 1; // regex: \p{C}
// helper flags
uint16_t is_whitespace : 1; // regex: \s
uint16_t is_lowercase : 1;
uint16_t is_uppercase : 1;
uint16_t is_nfd : 1;
// decode from uint16
inline unicode_cpt_flags(const uint16_t flags = 0) {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
*reinterpret_cast<uint16_t*>(this) = flags;
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
is_undefined = (flags & UNDEFINED) ? 1 : 0;
is_number = (flags & NUMBER) ? 1 : 0;
is_letter = (flags & LETTER) ? 1 : 0;
is_separator = (flags & SEPARATOR) ? 1 : 0;
is_accent_mark = (flags & ACCENT_MARK) ? 1 : 0;
is_punctuation = (flags & PUNCTUATION) ? 1 : 0;
is_symbol = (flags & SYMBOL) ? 1 : 0;
is_control = (flags & CONTROL) ? 1 : 0;
is_whitespace = (flags & WHITESPACE) ? 1 : 0;
is_lowercase = (flags & LOWERCASE) ? 1 : 0;
is_uppercase = (flags & UPPERCASE) ? 1 : 0;
is_nfd = (flags & NFD) ? 1 : 0;
#else
#error Unexpected or undefined __BYTE_ORDER__
#endif
}
inline uint16_t as_uint() const {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return *reinterpret_cast<const uint16_t*>(this);
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
uint16_t result =
is_undefined * UNDEFINED
+ is_number * NUMBER
+ is_letter * LETTER
+ is_separator * SEPARATOR
+ is_accent_mark * ACCENT_MARK
+ is_punctuation * PUNCTUATION
+ is_symbol * SYMBOL
+ is_control * CONTROL
+ is_whitespace * WHITESPACE
+ is_lowercase * LOWERCASE
+ is_uppercase * UPPERCASE
+ is_nfd * NFD
;
return result;
#else
#error Unexpected or undefined __BYTE_ORDER__
#endif
}
inline uint16_t category_flag() const {
return this->as_uint() & MASK_CATEGORIES;
}
};
size_t unicode_len_utf8(char src);
std::string unicode_cpt_to_utf8 (uint32_t cpt);
uint32_t unicode_cpt_from_utf8(const std::string & utf8, size_t & offset);
std::vector<uint32_t> unicode_cpts_from_utf8(const std::string & utf8);
std::vector<uint32_t> unicode_cpts_normalize_nfd(const std::vector<uint32_t> & cpts);
unicode_cpt_flags unicode_cpt_flags_from_cpt (uint32_t cpt);
unicode_cpt_flags unicode_cpt_flags_from_utf8(const std::string & utf8);
std::string unicode_byte_to_utf8(uint8_t byte);
uint8_t unicode_utf8_to_byte(const std::string & utf8);
uint32_t unicode_tolower(uint32_t cpt);
bool unicode_cpt_is_han(uint32_t cpt);
std::vector<std::string> unicode_regex_split(const std::string & text, const std::vector<std::string> & regex_exprs, bool byte_encode = true);