//

// Created by Marek on 1.10.2019.

//

#pragma once

#include <stdint.h>

namespace unidecode {

typedef uint32_t unicode_char;

static const uint8_t kMask0[] = {0xff};

static const uint8_t kMask1[] = {0x3f, 0x1f};

static const uint8_t kMask2[] = {0x3f, 0x3f, 0x0f};

static const uint8_t kMask3[] = {0x3f, 0x3f, 0x3f, 0x07};

static const uint8_t* kCodePointMasks[] = {

kMask0,

kMask1,

kMask2,

kMask3,

};

inline uint32_t GetCodePointSize(uint8_t value) {

uint32_t result = 0;

result += 1 * ((value & 0x80) == 0);

result += 2 * ((value & 0xE0) == 0xC0);

result += 3 * ((value & 0xF0) == 0xE0);

result += 4 * ((value & 0xF8) == 0xF0);

result += 1 * (result == 0);

return result;

}

inline unicode_char GetCodePoint(const char* ptr) {

uint32_t code_point_size = GetCodePointSize(*ptr);

const uint8_t* mask = kCodePointMasks[code_point_size - 1];

unicode_char result = 0;

for (uint32_t i = code_point_size; i-->0; ptr++) {

result |= (*ptr & mask[i]) << 6 * i;

}

return result;

}

}