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#ifndef CODE_POINT_H
#define CODE_POINT_H
#include <cstdint>
typedef wchar_t code_point_t;
namespace CodePoints {
struct CodePointMap {
code_point_t key;
code_point_t value;
};
const code_point_t TAB = 0x0009;
const code_point_t LF = 0x000A;
const code_point_t FF = 0x00C;
const code_point_t SPACE = 0x020;
const code_point_t SOLIDUS = 0x02F;
const code_point_t LOWERCASE_A = 0x0061;
const code_point_t LOWERCASE_Z = 0x007A;
const code_point_t LOWERCASE_F = 0x0066;
const code_point_t UPPERCASE_A = 0x041;
const code_point_t UPPERCASE_Z = 0x05A;
const code_point_t UPPERCASE_F = 0x0046;
const code_point_t NULL_CHAR = 0x0000;
const code_point_t REPLACEMENT_CHAR = 0xFFFD;
const code_point_t GREATER_THAN_SIGN = 0x003E;
const code_point_t LESS_THAN_SIGN = 0x003C;
const code_point_t AMPERSAND = 0x0026;
const code_point_t EXCLAMATION_MARK = 0x0021;
const code_point_t NUMBER_SIGN = 0x0023;
const code_point_t LOWERCASE_X = 0x0078;
const code_point_t UPPERCASE_X = 0x0058;
const code_point_t DIGIT_ZERO = 0x0030;
const code_point_t DIGIT_NINE = 0x0039;
const code_point_t SEMICOLON = 0x003B;
inline bool is_decimal(code_point_t c) {
return c >= CodePoints::DIGIT_ZERO && c <= CodePoints::DIGIT_NINE;
}
inline bool is_hex(code_point_t c) {
return (c >= CodePoints::DIGIT_ZERO && c <= CodePoints::DIGIT_NINE)
|| (c >= CodePoints::LOWERCASE_A && c <= CodePoints::LOWERCASE_F)
|| (c >= CodePoints::UPPERCASE_A && c <= CodePoints::UPPERCASE_F);
}
inline bool in_range(code_point_t c, code_point_t lo, code_point_t hi) {
return c >= lo && c <= hi;
}
constexpr CodePointMap CHARACTER_REF_PARSE_ERROR_REPALCEMENT[] = {
{ 0x00, 0xFFFD },
{ 0x0D, 0X000D },
{ 0x80, 0x20AC },
{ 0x81, 0x0081 },
{ 0x82, 0x201A },
{ 0x83, 0x0192 },
{ 0x84, 0x201E },
{ 0x85, 0x2026 },
{ 0x86, 0x2020 },
{ 0x87, 0x2021 },
{ 0x88, 0x02C6 },
{ 0x89, 0x2030 },
{ 0x8A, 0x0160 },
{ 0x8B, 0x2039 },
{ 0x8C, 0x0152 },
{ 0x8D, 0x008D },
{ 0x8E, 0x017D },
{ 0x8F, 0x008F },
{ 0x90, 0x0090 },
{ 0x91, 0x2018 },
{ 0x92, 0x2019 },
{ 0x93, 0x201C },
{ 0x94, 0x201D },
{ 0x95, 0x2022 },
{ 0x96, 0x2013 },
{ 0x97, 0x2014 },
{ 0x98, 0x02DC },
{ 0x99, 0x2122 },
{ 0x9A, 0x0161 },
{ 0x9B, 0x203A },
{ 0x9C, 0x0153 },
{ 0x9D, 0x009D },
{ 0x9E, 0x017E },
{ 0x9F, 0x0178 }
};
constexpr int CHARACTER_REF_PARSE_ERROR_REPALCEMENT_LEN = sizeof(CHARACTER_REF_PARSE_ERROR_REPALCEMENT) / sizeof(CodePointMap);
/**
* Attempts to get a character reference from the provided parsed code point value.
* See the following link for validation: https://dev.w3.org/html5/spec-LC/tokenization.html#consume-a-character-reference
* @param c Input character value
* @param out Output character reference
* @returns true if there wasn't a parse error, otherwise false
*/
inline bool try_get_character_ref(code_point_t c, code_point_t& out) {
for (int i = 0; i < CHARACTER_REF_PARSE_ERROR_REPALCEMENT_LEN; i++) {
if (CHARACTER_REF_PARSE_ERROR_REPALCEMENT[i].key == c) {
out = CHARACTER_REF_PARSE_ERROR_REPALCEMENT[i].value;
return false;
}
}
if ((c >= 0xD800 && c <= 0xDFFF) || c >= 0x10FFFF) {
out = REPLACEMENT_CHAR;
return false;
}
if (in_range(c, 0x0001, 0x0008)
|| in_range(c, 0x000E, 0x001F)
|| in_range(c, 0x007F, 0x009F)
|| in_range(c, 0xFDD0, 0xFDEF)
|| c == 0x000B
|| c == 0xFFFE
|| c == 0xFFFF
|| c == 0x1FFFE
|| c == 0x1FFFF
|| c == 0x2FFFE
|| c == 0x2FFFF
|| c == 0x3FFFE
|| c == 0x3FFFF
|| c == 0x4FFFE
|| c == 0x4FFFF
|| c == 0x5FFFE
|| c == 0x5FFFF
|| c == 0x6FFFE
|| c == 0x6FFFF
|| c == 0x7FFFE
|| c == 0x7FFFF
|| c == 0x8FFFE
|| c == 0x8FFFF
|| c == 0x9FFFE
|| c == 0x9FFFF
|| c == 0xAFFFE
|| c == 0xAFFFF
|| c == 0xBFFFE
|| c == 0xBFFFF
|| c == 0xCFFFE
|| c == 0xCFFFF
|| c == 0xDFFFE
|| c == 0xDFFFF
|| c == 0xEFFFE
|| c == 0xEFFFF
|| c == 0xFFFFE
|| c == 0xFFFFF
|| c == 0x10FFFE
|| c == 0x10FFFF) {
out = c;
return false;
}
out = c;
return true;
}
};
#endif
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