Function unicodeval_to_utf8str

src/hacklib.c:877–919

}

RESTORE_WARNING_FORMAT_NONLITERAL

/* Unicode routines */

int
unicodeval_to_utf8str(int uval, uint8 *buffer, size_t bufsz)
{
    //    static uint8 buffer[7];
    uint8 *b = buffer;

    if (bufsz < 5)
        return 0;
    /*
     *   Binary   Hex        Comments
     *   0xxxxxxx 0x00..0x7F Only byte of a 1-byte character encoding
     *   10xxxxxx 0x80..0xBF Continuation byte : one of 1-3 bytes following
     * first 110xxxxx 0xC0..0xDF First byte of a 2-byte character encoding
     *   1110xxxx 0xE0..0xEF First byte of a 3-byte character encoding
     *   11110xxx 0xF0..0xF7 First byte of a 4-byte character encoding
     */
    *b = '\0';
    if (uval < 0x80) {
        *b++ = uval;
    } else if (uval < 0x800) {
        *b++ = 192 + uval / 64;
        *b++ = 128 + uval % 64;
    } else if (uval - 0xd800u < 0x800) {
        return 0;
    } else if (uval < 0x10000) {
        *b++ = 224 + uval / 4096;
        *b++ = 128 + uval / 64 % 64;
        *b++ = 128 + uval % 64;
    } else if (uval < 0x110000) {
        *b++ = 240 + uval / 262144;
        *b++ = 128 + uval / 4096 % 64;
        *b++ = 128 + uval / 64 % 64;
        *b++ = 128 + uval % 64;
    } else {
        return 0;
    }
    *b = '\0'; /* NUL terminate */
    return 1;
}

int
case_insensitive_comp(const char *s1, const char *s2)