/* ========================== *
 * utf8
 * ========================== */

struct uni_decode_utf8_result {
    u32 advance8;
    u32 codepoint;
};

struct uni_encode_utf8_result {
    u32 count8;
    u8 chars8[4];
};

struct uni_decode_utf8_result uni_decode_utf8(struct string str);
struct uni_encode_utf8_result uni_encode_utf8(u32 codepoint);

/* ========================== *
 * utf16
 * ========================== */

struct uni_decode_utf16_result {
    u32 advance16;
    u32 codepoint;
};

struct uni_encode_utf16_result {
    u32 count16;
    u16 chars16[2];
};

struct uni_decode_utf16_result uni_decode_utf16(struct string16 str);
struct uni_encode_utf16_result uni_encode_utf16(u32 codepoint);
b32 uni_is_utf16_high_surrogate(u16 c);
b32 uni_is_utf16_low_surrogate(u16 c);

/* ========================== *
 * utf32
 * ========================== */

struct uni_decode_utf32_result {
    u32 advance32;
    u32 codepoint;
};

struct uni_encode_utf32_result {
    u32 chars32;
};

struct uni_decode_utf32_result uni_decode_utf32(struct string32 str);
struct uni_encode_utf32_result uni_encode_utf32(u32 codepoint);