import t, c


HEX_CHARS: t.CArray[t.CChar, None] = "0123456789abcdef"
HEX_VALS: t.CArray[t.CInt, 256]

B64_CHARS: t.CArray[t.CChar, None] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
B64_VALS: t.CArray[t.CInt, 256]

HQX_CHARS: t.CArray[t.CChar, 64] = [
    ' ', '!', chr(34), '#', '$', '%', '&', "'", '(', ')', '*', '+', ',', '-', '.', '/',
    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
    '@',
    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
    'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'X', 'Y', 'Z',
    '[', chr(92), '`',
    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm'
]
HQX_VALS: t.CArray[t.CInt, 256]

UU_CHARS: t.CArray[t.CChar, None] = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"

CRC32_TABLE: t.CArray[t.CUnsignedInt, 256] = [
    0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
    0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
    0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
    0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
    0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
    0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
    0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
    0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
    0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
    0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
    0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
    0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
    0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
    0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
    0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
    0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
    0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
    0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
    0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
    0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
    0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
    0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
    0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
    0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
    0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
    0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
    0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
    0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
    0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
    0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
    0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
    0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
]

CRC_HQX_TABLE: t.CArray[t.CUnsignedShort, 256] = [
    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
    0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
    0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
    0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
    0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
    0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
    0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
    0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
    0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
    0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
    0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
    0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
    0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
    0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
    0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
    0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
    0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
    0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
    0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
    0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
    0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
    0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
    0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
    0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
    0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
    0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
    0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
    0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
    0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
    0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
    0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
    0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
]

def init_binascii():
    i: t.CInt
    for i in range(256):
        HEX_VALS[i] = -1
        B64_VALS[i] = -1
        HQX_VALS[i] = -1
    for i in range(16):
        HEX_VALS[t.CInt(HEX_CHARS[i])] = i
        HEX_VALS[t.CInt(HEX_CHARS[i] - 32)] = i
    for i in range(64):
        B64_VALS[t.CInt(B64_CHARS[i])] = i
    for i in range(64):
        HQX_CHARS[i] = t.CChar(32 + i)
    for i in range(64):
        HQX_VALS[t.CUnsignedChar(HQX_CHARS[i])] = i

def crc32(data: str, length: t.CInt, crc: t.CUnsignedInt) -> t.CUnsignedInt:
    i: t.CInt
    s: t.CUnsignedInt = crc ^ 0xFFFFFFFF
    for i in range(length):
        s = CRC32_TABLE[(s ^ t.CUnsignedChar(data[i])) & 0xFF] ^ (s >> 8)
    return s ^ 0xFFFFFFFF

def crc_hqx(data: str, length: t.CInt, crc: t.CUnsignedShort) -> t.CUnsignedShort:
    i: t.CInt
    s: t.CUnsignedShort = crc
    for i in range(length):
        s = CRC_HQX_TABLE[t.CUnsignedChar(s >> 8)] ^ (s << 1 | (data[i] & 0xFF))
    return s

def hexlify(data: str, length: t.CInt) -> str:
    if not data or length < 0: return None
    out: str = str(malloc(length * 2 + 1))
    if not out: return None
    oi: t.CInt = 0
    for i in range(length):
        s: t.CUnsignedChar = t.CUnsignedChar(data[i])
        out[oi] = HEX_CHARS[(s >> 4) & 0x0F]
        oi += 1
        out[oi] = HEX_CHARS[(s >> 0) & 0x0F]
        oi += 1
    out[oi] = '\0'
    return out

def b2a_hex(data: str, length: t.CInt) -> str:
    return hexlify(data, length)

def a2b_hex(hexstr: str, length: t.CInt) -> str:
    if not hexstr or length < 0 or length % 2 != 0: return None
    out_len: t.CInt = length // 2
    out: str = str(malloc(out_len + 1))
    if not out: return None
    oi: t.CInt = 0
    for i in range(0, length, 2):
        hi: t.CInt = HEX_VALS[t.CUnsignedChar(hexstr[i])]
        lo: t.CInt = HEX_VALS[t.CUnsignedChar(hexstr[i + 1])]
        if hi < 0 or lo < 0:
            free(out)
            return None
        out[oi] = t.CChar((hi << 4) | lo)
        oi += 1
    out[oi] = '\0'
    return out

def unhexlify(data: str, length: t.CInt):
    return a2b_hex(data, length)

def b2a_base64(data: str, length: t.CInt) -> str:
    if not data or length < 0: return None
    olen: t.CInt = (length // 3) * 4
    if length % 3 != 0:
        olen += 4
    olen += 1
    out: str = str(malloc(olen + 1))
    if not out: return None
    oi: t.CInt = 0
    for i in range(0, length, 3):
        b0: t.CUnsignedChar = t.CUnsignedChar(data[i])
        b1: t.CUnsignedChar = 0
        b2: t.CUnsignedChar = 0
        if i + 1 < length:
            b1 = t.CUnsignedChar(data[i + 1])
        if i + 2 < length:
            b2 = t.CUnsignedChar(data[i + 2])
        out[oi] = B64_CHARS[(b0 >> 2) & 0x3F]
        oi += 1
        out[oi] = B64_CHARS[((b0 & 0x03) << 4) | ((b1 >> 4) & 0x0F)]
        oi += 1
        if i + 1 < length:
            out[oi] = B64_CHARS[((b1 & 0x0F) << 2) | ((b2 >> 6) & 0x03)]
        else:
            out[oi] = '='
        oi += 1
        if i + 2 < length:
            out[oi] = B64_CHARS[b2 & 0x3F]
        else:
            out[oi] = '='
        oi += 1
    out[oi] = '\0'
    return out

def a2b_base64(data: str, length: t.CInt) -> str:
    if not data or length < 4: return None
    olen: t.CInt = (length // 4) * 3
    if length >= 4 and data[length - 1] == '=':
        olen -= 1
    if length >= 4 and data[length - 2] == '=':
        olen -= 1
    out: str = str(malloc(olen + 1))
    if not out: return None
    oi: t.CInt = 0
    for i in range(0, length, 4):
        v0: t.CInt = 0
        v1: t.CInt = 0
        v2: t.CInt = 0
        v3: t.CInt = 0
        j: t.CInt
        for j in range(4):
            c: t.CChar = data[i + j]
            if c == '=':
                pass
            else:
                k: t.CInt
                for k in range(64):
                    if B64_CHARS[k] == c:
                        if j == 0: v0 = k
                        elif j == 1: v1 = k
                        elif j == 2: v2 = k
                        elif j == 3: v3 = k
                        break
        out[oi] = t.CChar((v0 << 2) | (v1 >> 4))
        oi += 1
        if data[i + 2] != '=':
            out[oi] = t.CChar(((v1 & 0x0F) << 4) | (v2 >> 2))
            oi += 1
        if data[i + 3] != '=':
            out[oi] = t.CChar(((v2 & 0x03) << 6) | v3)
            oi += 1
    out[oi] = '\0'
    return out

def b2a_uu(data: str, length: t.CInt) -> str:
    if not data or length < 1 or length > 45: return None
    out: str = str(malloc(length * 2 + 2))
    if not out: return None
    oi: t.CInt = 0
    out[oi] = UU_CHARS[length]
    oi += 1
    for i in range(0, length, 3):
        b0: t.CUnsignedChar = t.CUnsignedChar(data[i])
        b1: t.CUnsignedChar = 0
        b2: t.CUnsignedChar = 0
        if i + 1 < length:
            b1 = t.CUnsignedChar(data[i + 1])
        if i + 2 < length:
            b2 = t.CUnsignedChar(data[i + 2])
        m: t.CUnsignedInt = (t.CUnsignedInt(b0) << 16) | (t.CUnsignedInt(b1) << 8) | t.CUnsignedInt(b2)
        out[oi] = UU_CHARS[(m >> 18) & 0x3F]
        oi += 1
        out[oi] = UU_CHARS[(m >> 12) & 0x3F]
        oi += 1
        out[oi] = UU_CHARS[(m >> 6) & 0x3F]
        oi += 1
        out[oi] = UU_CHARS[m & 0x3F]
        oi += 1
    out[oi] = '\n'
    oi += 1
    out[oi] = '\0'
    return out

def a2b_uu(data: str) -> str:
    if not data or data[0] == ' ' or data[0] == '`': return None
    length: t.CInt = t.CInt(data[0]) - 32
    if length < 0 or length > 45: return None
    out: str = str(malloc(length + 1))
    if not out: return None
    oi: t.CInt = 0
    i: t.CInt = 1
    while oi < length:
        v0: t.CInt = data[i] - 32
        v1: t.CInt = data[i + 1] - 32
        v2: t.CInt = data[i + 2] - 32
        v3: t.CInt = data[i + 3] - 32
        if v0 < 0 or v0 > 63: v0 = 0
        if v1 < 0 or v1 > 63: v1 = 0
        if v2 < 0 or v2 > 63: v2 = 0
        if v3 < 0 or v3 > 63: v3 = 0
        m: t.CUnsignedInt = (t.CUnsignedInt(v0) << 18) | (t.CUnsignedInt(v1) << 12) | (t.CUnsignedInt(v2) << 6) | t.CUnsignedInt(v3)
        if oi < length:
            out[oi] = t.CChar((m >> 16) & 0xFF)
            oi += 1
        if oi < length:
            out[oi] = t.CChar((m >> 8) & 0xFF)
            oi += 1
        if oi < length:
            out[oi] = t.CChar(m & 0xFF)
            oi += 1
        i += 4
    out[oi] = '\0'
    return out

def b2a_hqx(data: str, length: t.CInt, crc: t.CUnsignedShort = 0) -> tuple[str, t.CUnsignedShort]:
    if not data or length != 3:
        return None, crc
    out: str = str(malloc(5))
    if not out:
        return None, crc
    # 3字节 → 4字节 HQX
    m: t.CUnsignedInt = (t.CUnsignedChar(data[0]) << 16) | (t.CUnsignedChar(data[1]) << 8) | t.CUnsignedChar(data[2])
    out[0] = HQX_CHARS[(m >> 18) & 0x3F]
    out[1] = HQX_CHARS[(m >> 12) & 0x3F]
    out[2] = HQX_CHARS[(m >>  6) & 0x3F]
    out[3] = HQX_CHARS[m & 0x3F]
    out[4] = '\0'
    # CRC 初始化 + 正确计算
    s: t.CUnsignedShort = crc
    for i in range(3):
        byte: t.CUnsignedChar = t.CUnsignedChar(data[i])
        s = (s << 8) ^ CRC_HQX_TABLE[((s >> 8) ^ byte) & 0xFF]
    return out, s


def a2b_hqx(data: str, crc: t.CUnsignedShort = 0) -> tuple[str, t.CUnsignedShort]:
    if not data:
        return None, crc
    # 检查字符是否有效
    for i in range(4):
        cchar: t.CUnsignedChar = t.CUnsignedChar(data[i])
        if HQX_VALS[cchar] < 0:
            return None, crc
    # 解码
    m: t.CUnsignedInt = 0
    for i in range(4):
        m = (m << 6) | t.CUnsignedInt(HQX_VALS[t.CUnsignedChar(data[i])])
    out: str = str(malloc(4))
    if not out:
        return None, crc
    out[0] = t.CChar((m >> 16) & 0xFF)
    out[1] = t.CChar((m >>  8) & 0xFF)
    out[2] = t.CChar(m & 0xFF)
    out[3] = '\0'
    # CRC 初始化 + 正确计算
    s: t.CUnsignedShort = crc
    for i in range(3):
        byte: t.CUnsignedChar = t.CUnsignedChar(out[i])
        s = (s << 8) ^ CRC_HQX_TABLE[((s >> 8) ^ byte) & 0xFF]
    return out, s

def adler32(data: str, length: t.CInt, adler: t.CUnsignedInt) -> t.CUnsignedInt:
    a: t.CUnsignedInt = adler & 0xFFFF
    b: t.CUnsignedInt = (adler >> 16) & 0xFFFF
    i: t.CInt
    for i in range(length):
        a = (a + t.CUnsignedChar(data[i])) % 65521
        b = (b + a) % 65521
    return (b << 16) | a
