static const uint32_t to_ucs4[256] = {
  [0x01] = 0x0001,
  [0x02] = 0x0002,
  [0x03] = 0x0003,
  [0x04] = 0x0004,
  [0x05] = 0x0005,
  [0x06] = 0x0006,
  [0x07] = 0x0007,
  [0x08] = 0x0008,
  [0x09] = 0x0009,
  [0x0A] = 0x000A,
  [0x0B] = 0x000B,
  [0x0C] = 0x000C,
  [0x0D] = 0x000D,
  [0x0E] = 0x000E,
  [0x0F] = 0x000F,
  [0x10] = 0x0010,
  [0x11] = 0x0011,
  [0x12] = 0x0012,
  [0x13] = 0x0013,
  [0x14] = 0x0014,
  [0x15] = 0x0015,
  [0x16] = 0x0016,
  [0x17] = 0x0017,
  [0x18] = 0x0018,
  [0x19] = 0x0019,
  [0x1A] = 0x001A,
  [0x1B] = 0x001B,
  [0x1C] = 0x001C,
  [0x1D] = 0x001D,
  [0x1E] = 0x001E,
  [0x1F] = 0x001F,
  [0x20] = 0x0020,
  [0x21] = 0x0021,
  [0x22] = 0x0022,
  [0x23] = 0x0023,
  [0x24] = 0x0024,
  [0x25] = 0x0025,
  [0x26] = 0x0026,
  [0x27] = 0x0027,
  [0x28] = 0x0028,
  [0x29] = 0x0029,
  [0x2A] = 0x002A,
  [0x2B] = 0x002B,
  [0x2C] = 0x002C,
  [0x2D] = 0x002D,
  [0x2E] = 0x002E,
  [0x2F] = 0x002F,
  [0x30] = 0x0030,
  [0x31] = 0x0031,
  [0x32] = 0x0032,
  [0x33] = 0x0033,
  [0x34] = 0x0034,
  [0x35] = 0x0035,
  [0x36] = 0x0036,
  [0x37] = 0x0037,
  [0x38] = 0x0038,
  [0x39] = 0x0039,
  [0x3A] = 0x003A,
  [0x3B] = 0x003B,
  [0x3C] = 0x003C,
  [0x3D] = 0x003D,
  [0x3E] = 0x003E,
  [0x3F] = 0x003F,
  [0x40] = 0x0040,
  [0x41] = 0x0041,
  [0x42] = 0x0042,
  [0x43] = 0x0043,
  [0x44] = 0x0044,
  [0x45] = 0x0045,
  [0x46] = 0x0046,
  [0x47] = 0x0047,
  [0x48] = 0x0048,
  [0x49] = 0x0049,
  [0x4A] = 0x004A,
  [0x4B] = 0x004B,
  [0x4C] = 0x004C,
  [0x4D] = 0x004D,
  [0x4E] = 0x004E,
  [0x4F] = 0x004F,
  [0x50] = 0x0050,
  [0x51] = 0x0051,
  [0x52] = 0x0052,
  [0x53] = 0x0053,
  [0x54] = 0x0054,
  [0x55] = 0x0055,
  [0x56] = 0x0056,
  [0x57] = 0x0057,
  [0x58] = 0x0058,
  [0x59] = 0x0059,
  [0x5A] = 0x005A,
  [0x5B] = 0x005B,
  [0x5C] = 0x005C,
  [0x5D] = 0x005D,
  [0x5E] = 0x005E,
  [0x5F] = 0x005F,
  [0x60] = 0x0060,
  [0x61] = 0x0061,
  [0x62] = 0x0062,
  [0x63] = 0x0063,
  [0x64] = 0x0064,
  [0x65] = 0x0065,
  [0x66] = 0x0066,
  [0x67] = 0x0067,
  [0x68] = 0x0068,
  [0x69] = 0x0069,
  [0x6A] = 0x006A,
  [0x6B] = 0x006B,
  [0x6C] = 0x006C,
  [0x6D] = 0x006D,
  [0x6E] = 0x006E,
  [0x6F] = 0x006F,
  [0x70] = 0x0070,
  [0x71] = 0x0071,
  [0x72] = 0x0072,
  [0x73] = 0x0073,
  [0x74] = 0x0074,
  [0x75] = 0x0075,
  [0x76] = 0x0076,
  [0x77] = 0x0077,
  [0x78] = 0x0078,
  [0x79] = 0x0079,
  [0x7A] = 0x007A,
  [0x7B] = 0x007B,
  [0x7C] = 0x007C,
  [0x7D] = 0x007D,
  [0x7E] = 0x007E,
  [0x7F] = 0x007F,
  [0x82] = 0x201A,
  [0x83] = 0x0192,
  [0x84] = 0x201E,
  [0x85] = 0x2026,
  [0x86] = 0x2020,
  [0x87] = 0x2021,
  [0x88] = 0x02C6,
  [0x89] = 0x2030,
  [0x8B] = 0x2039,
  [0x8C] = 0x0152,
  [0x91] = 0x2018,
  [0x92] = 0x2019,
  [0x93] = 0x201C,
  [0x94] = 0x201D,
  [0x95] = 0x2022,
  [0x96] = 0x2013,
  [0x97] = 0x2014,
  [0x98] = 0x02DC,
  [0x99] = 0x2122,
  [0x9B] = 0x203A,
  [0x9C] = 0x0153,
  [0x9F] = 0x0178,
  [0xA0] = 0x00A0,
  [0xA1] = 0x00A1,
  [0xA2] = 0x00A2,
  [0xA3] = 0x00A3,
  [0xA4] = 0x00A4,
  [0xA5] = 0x00A5,
  [0xA6] = 0x00A6,
  [0xA7] = 0x00A7,
  [0xA8] = 0x00A8,
  [0xA9] = 0x00A9,
  [0xAA] = 0x00AA,
  [0xAB] = 0x00AB,
  [0xAC] = 0x00AC,
  [0xAD] = 0x00AD,
  [0xAE] = 0x00AE,
  [0xAF] = 0x00AF,
  [0xB0] = 0x00B0,
  [0xB1] = 0x00B1,
  [0xB2] = 0x00B2,
  [0xB3] = 0x00B3,
  [0xB4] = 0x00B4,
  [0xB5] = 0x00B5,
  [0xB6] = 0x00B6,
  [0xB7] = 0x00B7,
  [0xB8] = 0x00B8,
  [0xB9] = 0x00B9,
  [0xBA] = 0x00BA,
  [0xBB] = 0x00BB,
  [0xBC] = 0x00BC,
  [0xBD] = 0x00BD,
  [0xBE] = 0x00BE,
  [0xBF] = 0x00BF,
  [0xC0] = 0x00C0,
  [0xC1] = 0x00C1,
  [0xC2] = 0x00C2,
  [0xC3] = 0x0102,
  [0xC4] = 0x00C4,
  [0xC5] = 0x00C5,
  [0xC6] = 0x00C6,
  [0xC7] = 0x00C7,
  [0xC8] = 0x00C8,
  [0xC9] = 0x00C9,
  [0xCA] = 0x00CA,
  [0xCB] = 0x00CB,
  [0xCC] = 0x0340,
  [0xCD] = 0x00CD,
  [0xCE] = 0x00CE,
  [0xCF] = 0x00CF,
  [0xD0] = 0x0110,
  [0xD1] = 0x00D1,
  [0xD2] = 0x0309,
  [0xD3] = 0x00D3,
  [0xD4] = 0x00D4,
  [0xD5] = 0x01A0,
  [0xD6] = 0x00D6,
  [0xD7] = 0x00D7,
  [0xD8] = 0x00D8,
  [0xD9] = 0x00D9,
  [0xDA] = 0x00DA,
  [0xDB] = 0x00DB,
  [0xDC] = 0x00DC,
  [0xDD] = 0x01AF,
  [0xDE] = 0x0303,
  [0xDF] = 0x00DF,
  [0xE0] = 0x00E0,
  [0xE1] = 0x00E1,
  [0xE2] = 0x00E2,
  [0xE3] = 0x0103,
  [0xE4] = 0x00E4,
  [0xE5] = 0x00E5,
  [0xE6] = 0x00E6,
  [0xE7] = 0x00E7,
  [0xE8] = 0x00E8,
  [0xE9] = 0x00E9,
  [0xEA] = 0x00EA,
  [0xEB] = 0x00EB,
  [0xEC] = 0x0341,
  [0xED] = 0x00ED,
  [0xEE] = 0x00EE,
  [0xEF] = 0x00EF,
  [0xF0] = 0x0111,
  [0xF1] = 0x00F1,
  [0xF2] = 0x0323,
  [0xF3] = 0x00F3,
  [0xF4] = 0x00F4,
  [0xF5] = 0x01A1,
  [0xF6] = 0x00F6,
  [0xF7] = 0x00F7,
  [0xF8] = 0x00F8,
  [0xF9] = 0x00F9,
  [0xFA] = 0x00FA,
  [0xFB] = 0x00FB,
  [0xFC] = 0x00FC,
  [0xFD] = 0x01B0,
  [0xFE] = 0x20AB,
  [0xFF] = 0x00FF,
};
static const struct gap from_idx[] = {
  { start: 0x0000, end: 0x007f, idx:     0 },
  { start: 0x00a0, end: 0x0103, idx:   -32 },
  { start: 0x0110, end: 0x0111, idx:   -44 },
  { start: 0x0152, end: 0x0153, idx:  -108 },
  { start: 0x0178, end: 0x0178, idx:  -144 },
  { start: 0x0192, end: 0x0192, idx:  -169 },
  { start: 0x01a0, end: 0x01a1, idx:  -182 },
  { start: 0x01af, end: 0x01b0, idx:  -195 },
  { start: 0x02c6, end: 0x02c6, idx:  -472 },
  { start: 0x02dc, end: 0x02dc, idx:  -493 },
  { start: 0x0303, end: 0x0309, idx:  -531 },
  { start: 0x0323, end: 0x0323, idx:  -556 },
  { start: 0x0340, end: 0x0341, idx:  -584 },
  { start: 0x2013, end: 0x2026, idx: -7961 },
  { start: 0x2030, end: 0x2030, idx: -7970 },
  { start: 0x2039, end: 0x203a, idx: -7978 },
  { start: 0x20ab, end: 0x20ab, idx: -8090 },
  { start: 0x2122, end: 0x2122, idx: -8208 },
  { start: 0xffff, end: 0xffff, idx:     0 }
};
static const char from_ucs4[] = {

  '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
  '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f',
  '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17',
  '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f',
  '\x20', '\x21', '\x22', '\x23', '\x24', '\x25', '\x26', '\x27',
  '\x28', '\x29', '\x2a', '\x2b', '\x2c', '\x2d', '\x2e', '\x2f',
  '\x30', '\x31', '\x32', '\x33', '\x34', '\x35', '\x36', '\x37',
  '\x38', '\x39', '\x3a', '\x3b', '\x3c', '\x3d', '\x3e', '\x3f',
  '\x40', '\x41', '\x42', '\x43', '\x44', '\x45', '\x46', '\x47',
  '\x48', '\x49', '\x4a', '\x4b', '\x4c', '\x4d', '\x4e', '\x4f',
  '\x50', '\x51', '\x52', '\x53', '\x54', '\x55', '\x56', '\x57',
  '\x58', '\x59', '\x5a', '\x5b', '\x5c', '\x5d', '\x5e', '\x5f',
  '\x60', '\x61', '\x62', '\x63', '\x64', '\x65', '\x66', '\x67',
  '\x68', '\x69', '\x6a', '\x6b', '\x6c', '\x6d', '\x6e', '\x6f',
  '\x70', '\x71', '\x72', '\x73', '\x74', '\x75', '\x76', '\x77',
  '\x78', '\x79', '\x7a', '\x7b', '\x7c', '\x7d', '\x7e', '\x7f',
  '\xa0', '\xa1', '\xa2', '\xa3', '\xa4', '\xa5', '\xa6', '\xa7',
  '\xa8', '\xa9', '\xaa', '\xab', '\xac', '\xad', '\xae', '\xaf',
  '\xb0', '\xb1', '\xb2', '\xb3', '\xb4', '\xb5', '\xb6', '\xb7',
  '\xb8', '\xb9', '\xba', '\xbb', '\xbc', '\xbd', '\xbe', '\xbf',
  '\xc0', '\xc1', '\xc2', '\x00', '\xc4', '\xc5', '\xc6', '\xc7',
  '\xc8', '\xc9', '\xca', '\xcb', '\x00', '\xcd', '\xce', '\xcf',
  '\x00', '\xd1', '\x00', '\xd3', '\xd4', '\x00', '\xd6', '\xd7',
  '\xd8', '\xd9', '\xda', '\xdb', '\xdc', '\x00', '\x00', '\xdf',
  '\xe0', '\xe1', '\xe2', '\x00', '\xe4', '\xe5', '\xe6', '\xe7',
  '\xe8', '\xe9', '\xea', '\xeb', '\x00', '\xed', '\xee', '\xef',
  '\x00', '\xf1', '\x00', '\xf3', '\xf4', '\x00', '\xf6', '\xf7',
  '\xf8', '\xf9', '\xfa', '\xfb', '\xfc', '\x00', '\x00', '\xff',
  '\x00', '\x00', '\xc3', '\xe3', '\xd0', '\xf0', '\x8c', '\x9c',
  '\x9f', '\x83', '\xd5', '\xf5', '\xdd', '\xfd', '\x88', '\x98',
  '\xde', '\x00', '\x00', '\x00', '\x00', '\x00', '\xd2', '\xf2',
  '\xcc', '\xec', '\x96', '\x97', '\x00', '\x00', '\x00', '\x91',
  '\x92', '\x82', '\x00', '\x93', '\x94', '\x84', '\x00', '\x86',
  '\x87', '\x95', '\x00', '\x00', '\x00', '\x85', '\x89', '\x8b',
  '\x9b', '\xfe', '\x99',
};