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,
  [0x40] = 0x0491,
  [0x41] = 0x0452,
  [0x42] = 0x0453,
  [0x43] = 0x0454,
  [0x44] = 0x0451,
  [0x45] = 0x0455,
  [0x46] = 0x0456,
  [0x47] = 0x0457,
  [0x48] = 0x0458,
  [0x49] = 0x0459,
  [0x4a] = 0x045A,
  [0x4b] = 0x045B,
  [0x4c] = 0x045C,
  [0x4d] = 0x045E,
  [0x4e] = 0x045F,
  [0x50] = 0x0463,
  [0x51] = 0x0473,
  [0x52] = 0x0475,
  [0x53] = 0x046B,
  [0x5b] = 0x005B,
  [0x5d] = 0x005D,
  [0x5f] = 0x005F,
  [0x60] = 0x0490,
  [0x61] = 0x0402,
  [0x62] = 0x0403,
  [0x63] = 0x0404,
  [0x64] = 0x0401,
  [0x65] = 0x0405,
  [0x66] = 0x0406,
  [0x67] = 0x0407,
  [0x68] = 0x0408,
  [0x69] = 0x0409,
  [0x6a] = 0x040A,
  [0x6b] = 0x040B,
  [0x6c] = 0x040C,
  [0x6d] = 0x040E,
  [0x6e] = 0x040F,
  [0x6f] = 0x042A,
  [0x70] = 0x0462,
  [0x71] = 0x0472,
  [0x72] = 0x0474,
  [0x73] = 0x046A,
  [0x7f] = 0x007F,
};
static const struct gap from_idx[] = {
  { .start = 0x0000, .end = 0x0020, .idx =     0 },
  { .start = 0x005b, .end = 0x005f, .idx =   -58 },
  { .start = 0x007f, .end = 0x007f, .idx =   -89 },
  { .start = 0x0401, .end = 0x040f, .idx =  -986 },
  { .start = 0x042a, .end = 0x042a, .idx = -1012 },
  { .start = 0x0451, .end = 0x0463, .idx = -1050 },
  { .start = 0x046a, .end = 0x046b, .idx = -1056 },
  { .start = 0x0472, .end = 0x0475, .idx = -1062 },
  { .start = 0x0490, .end = 0x0491, .idx = -1088 },
  { .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', '\x5b', '\x00', '\x5d', '\x00', '\x5f', '\x7f', '\x64',
  '\x61', '\x62', '\x63', '\x65', '\x66', '\x67', '\x68', '\x69',
  '\x6a', '\x6b', '\x6c', '\x00', '\x6d', '\x6e', '\x6f', '\x44',
  '\x41', '\x42', '\x43', '\x45', '\x46', '\x47', '\x48', '\x49',
  '\x4a', '\x4b', '\x4c', '\x00', '\x4d', '\x4e', '\x00', '\x00',
  '\x70', '\x50', '\x73', '\x53', '\x71', '\x51', '\x72', '\x52',
  '\x60', '\x40',
};