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unicode.c
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#include "widcc.h"
#define MASK(bits) (uint8_t)((1 << (bits)) - 1)
#define MASK2(bits, shift) (uint8_t)(MASK(bits) << (shift))
// Encode a given character in UTF-8.
int encode_utf8(char *buf, uint32_t c) {
if (c <= 0x7F) {
buf[0] = c;
return 1;
}
if (c <= 0x7FF) {
buf[0] = MASK2(2, 6) | (c >> 6);
buf[1] = MASK2(1, 7) | (c & MASK(6));
return 2;
}
if (c <= 0xFFFF) {
buf[0] = MASK2(3, 5) | (c >> 12);
buf[1] = MASK2(1, 7) | ((c >> 6) & MASK(6));
buf[2] = MASK2(1, 7) | (c & MASK(6));
return 3;
}
buf[0] = MASK2(4, 4) | (c >> 18);
buf[1] = MASK2(1, 7) | ((c >> 12) & MASK(6));
buf[2] = MASK2(1, 7) | ((c >> 6) & MASK(6));
buf[3] = MASK2(1, 7) | (c & MASK(6));
return 4;
}
// Read a UTF-8-encoded Unicode code point from a source file.
// We assume that source files are always in UTF-8.
//
// UTF-8 is a variable-width encoding in which one code point is
// encoded in one to four bytes. One byte UTF-8 code points are
// identical to ASCII. Non-ASCII characters are encoded using more
// than one byte.
uint32_t decode_utf8(char **new_pos, char *p) {
if ((unsigned char)*p < 128) {
*new_pos = p + 1;
return *p;
}
char *start = p;
int len;
uint32_t c;
if ((unsigned char)*p >= MASK2(4, 4)) {
len = 4;
c = *p & MASK(3);
} else if ((unsigned char)*p >= MASK2(3, 5)) {
len = 3;
c = *p & MASK(4);
} else if ((unsigned char)*p >= MASK2(2, 6)) {
len = 2;
c = *p & MASK(5);
} else {
error_at(start, "invalid UTF-8 sequence");
}
for (int i = 1; i < len; i++) {
if ((unsigned char)p[i] >> 6 != MASK2(1, 1))
error_at(start, "invalid UTF-8 sequence");
c = (c << 6) | (p[i] & MASK(6));
}
*new_pos = p + len;
return c;
}
// Values "range" points to must be in ascending order
static bool in_ordered_range(uint32_t *range, uint32_t c) {
for (int i = 0; range[i] != -1; i += 2) {
if (c > range[i + 1])
continue;
if (range[i] <= c)
return true;
return false;
}
return false;
}
// This function returns true if a given character is acceptable as
// the first character of an identifier.
//
// Non-ASCII characters correspond to XID_Start set of Unicode 15.1.
bool is_ident1(uint32_t c) {
static uint32_t range[] = {
'$', '$', 'A', 'Z', '_', '_', 'a', 'z',
0x00AA, 0x00AA, 0x00B5, 0x00B5, 0x00BA, 0x00BA, 0x00C0, 0x00D6,
0x00D8, 0x00F6, 0x00F8, 0x02C1, 0x02C6, 0x02D1, 0x02E0, 0x02E4,
0x02EC, 0x02EC, 0x02EE, 0x02EE, 0x0370, 0x0374, 0x0376, 0x0377,
0x037B, 0x037D, 0x037F, 0x037F, 0x0386, 0x0386, 0x0388, 0x038A,
0x038C, 0x038C, 0x038E, 0x03A1, 0x03A3, 0x03F5, 0x03F7, 0x0481,
0x048A, 0x052F, 0x0531, 0x0556, 0x0559, 0x0559, 0x0560, 0x0588,
0x05D0, 0x05EA, 0x05EF, 0x05F2, 0x0620, 0x064A, 0x066E, 0x066F,
0x0671, 0x06D3, 0x06D5, 0x06D5, 0x06E5, 0x06E6, 0x06EE, 0x06EF,
0x06FA, 0x06FC, 0x06FF, 0x06FF, 0x0710, 0x0710, 0x0712, 0x072F,
0x074D, 0x07A5, 0x07B1, 0x07B1, 0x07CA, 0x07EA, 0x07F4, 0x07F5,
0x07FA, 0x07FA, 0x0800, 0x0815, 0x081A, 0x081A, 0x0824, 0x0824,
0x0828, 0x0828, 0x0840, 0x0858, 0x0860, 0x086A, 0x0870, 0x0887,
0x0889, 0x088E, 0x08A0, 0x08C9, 0x0904, 0x0939, 0x093D, 0x093D,
0x0950, 0x0950, 0x0958, 0x0961, 0x0971, 0x0980, 0x0985, 0x098C,
0x098F, 0x0990, 0x0993, 0x09A8, 0x09AA, 0x09B0, 0x09B2, 0x09B2,
0x09B6, 0x09B9, 0x09BD, 0x09BD, 0x09CE, 0x09CE, 0x09DC, 0x09DD,
0x09DF, 0x09E1, 0x09F0, 0x09F1, 0x09FC, 0x09FC, 0x0A05, 0x0A0A,
0x0A0F, 0x0A10, 0x0A13, 0x0A28, 0x0A2A, 0x0A30, 0x0A32, 0x0A33,
0x0A35, 0x0A36, 0x0A38, 0x0A39, 0x0A59, 0x0A5C, 0x0A5E, 0x0A5E,
0x0A72, 0x0A74, 0x0A85, 0x0A8D, 0x0A8F, 0x0A91, 0x0A93, 0x0AA8,
0x0AAA, 0x0AB0, 0x0AB2, 0x0AB3, 0x0AB5, 0x0AB9, 0x0ABD, 0x0ABD,
0x0AD0, 0x0AD0, 0x0AE0, 0x0AE1, 0x0AF9, 0x0AF9, 0x0B05, 0x0B0C,
0x0B0F, 0x0B10, 0x0B13, 0x0B28, 0x0B2A, 0x0B30, 0x0B32, 0x0B33,
0x0B35, 0x0B39, 0x0B3D, 0x0B3D, 0x0B5C, 0x0B5D, 0x0B5F, 0x0B61,
0x0B71, 0x0B71, 0x0B83, 0x0B83, 0x0B85, 0x0B8A, 0x0B8E, 0x0B90,
0x0B92, 0x0B95, 0x0B99, 0x0B9A, 0x0B9C, 0x0B9C, 0x0B9E, 0x0B9F,
0x0BA3, 0x0BA4, 0x0BA8, 0x0BAA, 0x0BAE, 0x0BB9, 0x0BD0, 0x0BD0,
0x0C05, 0x0C0C, 0x0C0E, 0x0C10, 0x0C12, 0x0C28, 0x0C2A, 0x0C39,
0x0C3D, 0x0C3D, 0x0C58, 0x0C5A, 0x0C5D, 0x0C5D, 0x0C60, 0x0C61,
0x0C80, 0x0C80, 0x0C85, 0x0C8C, 0x0C8E, 0x0C90, 0x0C92, 0x0CA8,
0x0CAA, 0x0CB3, 0x0CB5, 0x0CB9, 0x0CBD, 0x0CBD, 0x0CDD, 0x0CDE,
0x0CE0, 0x0CE1, 0x0CF1, 0x0CF2, 0x0D04, 0x0D0C, 0x0D0E, 0x0D10,
0x0D12, 0x0D3A, 0x0D3D, 0x0D3D, 0x0D4E, 0x0D4E, 0x0D54, 0x0D56,
0x0D5F, 0x0D61, 0x0D7A, 0x0D7F, 0x0D85, 0x0D96, 0x0D9A, 0x0DB1,
0x0DB3, 0x0DBB, 0x0DBD, 0x0DBD, 0x0DC0, 0x0DC6, 0x0E01, 0x0E30,
0x0E32, 0x0E32, 0x0E40, 0x0E46, 0x0E81, 0x0E82, 0x0E84, 0x0E84,
0x0E86, 0x0E8A, 0x0E8C, 0x0EA3, 0x0EA5, 0x0EA5, 0x0EA7, 0x0EB0,
0x0EB2, 0x0EB2, 0x0EBD, 0x0EBD, 0x0EC0, 0x0EC4, 0x0EC6, 0x0EC6,
0x0EDC, 0x0EDF, 0x0F00, 0x0F00, 0x0F40, 0x0F47, 0x0F49, 0x0F6C,
0x0F88, 0x0F8C, 0x1000, 0x102A, 0x103F, 0x103F, 0x1050, 0x1055,
0x105A, 0x105D, 0x1061, 0x1061, 0x1065, 0x1066, 0x106E, 0x1070,
0x1075, 0x1081, 0x108E, 0x108E, 0x10A0, 0x10C5, 0x10C7, 0x10C7,
0x10CD, 0x10CD, 0x10D0, 0x10FA, 0x10FC, 0x1248, 0x124A, 0x124D,
0x1250, 0x1256, 0x1258, 0x1258, 0x125A, 0x125D, 0x1260, 0x1288,
0x128A, 0x128D, 0x1290, 0x12B0, 0x12B2, 0x12B5, 0x12B8, 0x12BE,
0x12C0, 0x12C0, 0x12C2, 0x12C5, 0x12C8, 0x12D6, 0x12D8, 0x1310,
0x1312, 0x1315, 0x1318, 0x135A, 0x1380, 0x138F, 0x13A0, 0x13F5,
0x13F8, 0x13FD, 0x1401, 0x166C, 0x166F, 0x167F, 0x1681, 0x169A,
0x16A0, 0x16EA, 0x16EE, 0x16F8, 0x1700, 0x1711, 0x171F, 0x1731,
0x1740, 0x1751, 0x1760, 0x176C, 0x176E, 0x1770, 0x1780, 0x17B3,
0x17D7, 0x17D7, 0x17DC, 0x17DC, 0x1820, 0x1878, 0x1880, 0x18A8,
0x18AA, 0x18AA, 0x18B0, 0x18F5, 0x1900, 0x191E, 0x1950, 0x196D,
0x1970, 0x1974, 0x1980, 0x19AB, 0x19B0, 0x19C9, 0x1A00, 0x1A16,
0x1A20, 0x1A54, 0x1AA7, 0x1AA7, 0x1B05, 0x1B33, 0x1B45, 0x1B4C,
0x1B83, 0x1BA0, 0x1BAE, 0x1BAF, 0x1BBA, 0x1BE5, 0x1C00, 0x1C23,
0x1C4D, 0x1C4F, 0x1C5A, 0x1C7D, 0x1C80, 0x1C88, 0x1C90, 0x1CBA,
0x1CBD, 0x1CBF, 0x1CE9, 0x1CEC, 0x1CEE, 0x1CF3, 0x1CF5, 0x1CF6,
0x1CFA, 0x1CFA, 0x1D00, 0x1DBF, 0x1E00, 0x1F15, 0x1F18, 0x1F1D,
0x1F20, 0x1F45, 0x1F48, 0x1F4D, 0x1F50, 0x1F57, 0x1F59, 0x1F59,
0x1F5B, 0x1F5B, 0x1F5D, 0x1F5D, 0x1F5F, 0x1F7D, 0x1F80, 0x1FB4,
0x1FB6, 0x1FBC, 0x1FBE, 0x1FBE, 0x1FC2, 0x1FC4, 0x1FC6, 0x1FCC,
0x1FD0, 0x1FD3, 0x1FD6, 0x1FDB, 0x1FE0, 0x1FEC, 0x1FF2, 0x1FF4,
0x1FF6, 0x1FFC, 0x2071, 0x2071, 0x207F, 0x207F, 0x2090, 0x209C,
0x2102, 0x2102, 0x2107, 0x2107, 0x210A, 0x2113, 0x2115, 0x2115,
0x2118, 0x211D, 0x2124, 0x2124, 0x2126, 0x2126, 0x2128, 0x2128,
0x212A, 0x2139, 0x213C, 0x213F, 0x2145, 0x2149, 0x214E, 0x214E,
0x2160, 0x2188, 0x2C00, 0x2CE4, 0x2CEB, 0x2CEE, 0x2CF2, 0x2CF3,
0x2D00, 0x2D25, 0x2D27, 0x2D27, 0x2D2D, 0x2D2D, 0x2D30, 0x2D67,
0x2D6F, 0x2D6F, 0x2D80, 0x2D96, 0x2DA0, 0x2DA6, 0x2DA8, 0x2DAE,
0x2DB0, 0x2DB6, 0x2DB8, 0x2DBE, 0x2DC0, 0x2DC6, 0x2DC8, 0x2DCE,
0x2DD0, 0x2DD6, 0x2DD8, 0x2DDE, 0x3005, 0x3007, 0x3021, 0x3029,
0x3031, 0x3035, 0x3038, 0x303C, 0x3041, 0x3096, 0x309D, 0x309F,
0x30A1, 0x30FA, 0x30FC, 0x30FF, 0x3105, 0x312F, 0x3131, 0x318E,
0x31A0, 0x31BF, 0x31F0, 0x31FF, 0x3400, 0x4DBF, 0x4E00, 0xA48C,
0xA4D0, 0xA4FD, 0xA500, 0xA60C, 0xA610, 0xA61F, 0xA62A, 0xA62B,
0xA640, 0xA66E, 0xA67F, 0xA69D, 0xA6A0, 0xA6EF, 0xA717, 0xA71F,
0xA722, 0xA788, 0xA78B, 0xA7CA, 0xA7D0, 0xA7D1, 0xA7D3, 0xA7D3,
0xA7D5, 0xA7D9, 0xA7F2, 0xA801, 0xA803, 0xA805, 0xA807, 0xA80A,
0xA80C, 0xA822, 0xA840, 0xA873, 0xA882, 0xA8B3, 0xA8F2, 0xA8F7,
0xA8FB, 0xA8FB, 0xA8FD, 0xA8FE, 0xA90A, 0xA925, 0xA930, 0xA946,
0xA960, 0xA97C, 0xA984, 0xA9B2, 0xA9CF, 0xA9CF, 0xA9E0, 0xA9E4,
0xA9E6, 0xA9EF, 0xA9FA, 0xA9FE, 0xAA00, 0xAA28, 0xAA40, 0xAA42,
0xAA44, 0xAA4B, 0xAA60, 0xAA76, 0xAA7A, 0xAA7A, 0xAA7E, 0xAAAF,
0xAAB1, 0xAAB1, 0xAAB5, 0xAAB6, 0xAAB9, 0xAABD, 0xAAC0, 0xAAC0,
0xAAC2, 0xAAC2, 0xAADB, 0xAADD, 0xAAE0, 0xAAEA, 0xAAF2, 0xAAF4,
0xAB01, 0xAB06, 0xAB09, 0xAB0E, 0xAB11, 0xAB16, 0xAB20, 0xAB26,
0xAB28, 0xAB2E, 0xAB30, 0xAB5A, 0xAB5C, 0xAB69, 0xAB70, 0xABE2,
0xAC00, 0xD7A3, 0xD7B0, 0xD7C6, 0xD7CB, 0xD7FB, 0xF900, 0xFA6D,
0xFA70, 0xFAD9, 0xFB00, 0xFB06, 0xFB13, 0xFB17, 0xFB1D, 0xFB1D,
0xFB1F, 0xFB28, 0xFB2A, 0xFB36, 0xFB38, 0xFB3C, 0xFB3E, 0xFB3E,
0xFB40, 0xFB41, 0xFB43, 0xFB44, 0xFB46, 0xFBB1, 0xFBD3, 0xFC5D,
0xFC64, 0xFD3D, 0xFD50, 0xFD8F, 0xFD92, 0xFDC7, 0xFDF0, 0xFDF9,
0xFE71, 0xFE71, 0xFE73, 0xFE73, 0xFE77, 0xFE77, 0xFE79, 0xFE79,
0xFE7B, 0xFE7B, 0xFE7D, 0xFE7D, 0xFE7F, 0xFEFC, 0xFF21, 0xFF3A,
0xFF41, 0xFF5A, 0xFF66, 0xFF9D, 0xFFA0, 0xFFBE, 0xFFC2, 0xFFC7,
0xFFCA, 0xFFCF, 0xFFD2, 0xFFD7, 0xFFDA, 0xFFDC, 0x10000, 0x1000B,
0x1000D, 0x10026, 0x10028, 0x1003A, 0x1003C, 0x1003D, 0x1003F, 0x1004D,
0x10050, 0x1005D, 0x10080, 0x100FA, 0x10140, 0x10174, 0x10280, 0x1029C,
0x102A0, 0x102D0, 0x10300, 0x1031F, 0x1032D, 0x1034A, 0x10350, 0x10375,
0x10380, 0x1039D, 0x103A0, 0x103C3, 0x103C8, 0x103CF, 0x103D1, 0x103D5,
0x10400, 0x1049D, 0x104B0, 0x104D3, 0x104D8, 0x104FB, 0x10500, 0x10527,
0x10530, 0x10563, 0x10570, 0x1057A, 0x1057C, 0x1058A, 0x1058C, 0x10592,
0x10594, 0x10595, 0x10597, 0x105A1, 0x105A3, 0x105B1, 0x105B3, 0x105B9,
0x105BB, 0x105BC, 0x10600, 0x10736, 0x10740, 0x10755, 0x10760, 0x10767,
0x10780, 0x10785, 0x10787, 0x107B0, 0x107B2, 0x107BA, 0x10800, 0x10805,
0x10808, 0x10808, 0x1080A, 0x10835, 0x10837, 0x10838, 0x1083C, 0x1083C,
0x1083F, 0x10855, 0x10860, 0x10876, 0x10880, 0x1089E, 0x108E0, 0x108F2,
0x108F4, 0x108F5, 0x10900, 0x10915, 0x10920, 0x10939, 0x10980, 0x109B7,
0x109BE, 0x109BF, 0x10A00, 0x10A00, 0x10A10, 0x10A13, 0x10A15, 0x10A17,
0x10A19, 0x10A35, 0x10A60, 0x10A7C, 0x10A80, 0x10A9C, 0x10AC0, 0x10AC7,
0x10AC9, 0x10AE4, 0x10B00, 0x10B35, 0x10B40, 0x10B55, 0x10B60, 0x10B72,
0x10B80, 0x10B91, 0x10C00, 0x10C48, 0x10C80, 0x10CB2, 0x10CC0, 0x10CF2,
0x10D00, 0x10D23, 0x10E80, 0x10EA9, 0x10EB0, 0x10EB1, 0x10F00, 0x10F1C,
0x10F27, 0x10F27, 0x10F30, 0x10F45, 0x10F70, 0x10F81, 0x10FB0, 0x10FC4,
0x10FE0, 0x10FF6, 0x11003, 0x11037, 0x11071, 0x11072, 0x11075, 0x11075,
0x11083, 0x110AF, 0x110D0, 0x110E8, 0x11103, 0x11126, 0x11144, 0x11144,
0x11147, 0x11147, 0x11150, 0x11172, 0x11176, 0x11176, 0x11183, 0x111B2,
0x111C1, 0x111C4, 0x111DA, 0x111DA, 0x111DC, 0x111DC, 0x11200, 0x11211,
0x11213, 0x1122B, 0x1123F, 0x11240, 0x11280, 0x11286, 0x11288, 0x11288,
0x1128A, 0x1128D, 0x1128F, 0x1129D, 0x1129F, 0x112A8, 0x112B0, 0x112DE,
0x11305, 0x1130C, 0x1130F, 0x11310, 0x11313, 0x11328, 0x1132A, 0x11330,
0x11332, 0x11333, 0x11335, 0x11339, 0x1133D, 0x1133D, 0x11350, 0x11350,
0x1135D, 0x11361, 0x11400, 0x11434, 0x11447, 0x1144A, 0x1145F, 0x11461,
0x11480, 0x114AF, 0x114C4, 0x114C5, 0x114C7, 0x114C7, 0x11580, 0x115AE,
0x115D8, 0x115DB, 0x11600, 0x1162F, 0x11644, 0x11644, 0x11680, 0x116AA,
0x116B8, 0x116B8, 0x11700, 0x1171A, 0x11740, 0x11746, 0x11800, 0x1182B,
0x118A0, 0x118DF, 0x118FF, 0x11906, 0x11909, 0x11909, 0x1190C, 0x11913,
0x11915, 0x11916, 0x11918, 0x1192F, 0x1193F, 0x1193F, 0x11941, 0x11941,
0x119A0, 0x119A7, 0x119AA, 0x119D0, 0x119E1, 0x119E1, 0x119E3, 0x119E3,
0x11A00, 0x11A00, 0x11A0B, 0x11A32, 0x11A3A, 0x11A3A, 0x11A50, 0x11A50,
0x11A5C, 0x11A89, 0x11A9D, 0x11A9D, 0x11AB0, 0x11AF8, 0x11C00, 0x11C08,
0x11C0A, 0x11C2E, 0x11C40, 0x11C40, 0x11C72, 0x11C8F, 0x11D00, 0x11D06,
0x11D08, 0x11D09, 0x11D0B, 0x11D30, 0x11D46, 0x11D46, 0x11D60, 0x11D65,
0x11D67, 0x11D68, 0x11D6A, 0x11D89, 0x11D98, 0x11D98, 0x11EE0, 0x11EF2,
0x11F02, 0x11F02, 0x11F04, 0x11F10, 0x11F12, 0x11F33, 0x11FB0, 0x11FB0,
0x12000, 0x12399, 0x12400, 0x1246E, 0x12480, 0x12543, 0x12F90, 0x12FF0,
0x13000, 0x1342F, 0x13441, 0x13446, 0x14400, 0x14646, 0x16800, 0x16A38,
0x16A40, 0x16A5E, 0x16A70, 0x16ABE, 0x16AD0, 0x16AED, 0x16B00, 0x16B2F,
0x16B40, 0x16B43, 0x16B63, 0x16B77, 0x16B7D, 0x16B8F, 0x16E40, 0x16E7F,
0x16F00, 0x16F4A, 0x16F50, 0x16F50, 0x16F93, 0x16F9F, 0x16FE0, 0x16FE1,
0x16FE3, 0x16FE3, 0x17000, 0x187F7, 0x18800, 0x18CD5, 0x18D00, 0x18D08,
0x1AFF0, 0x1AFF3, 0x1AFF5, 0x1AFFB, 0x1AFFD, 0x1AFFE, 0x1B000, 0x1B122,
0x1B132, 0x1B132, 0x1B150, 0x1B152, 0x1B155, 0x1B155, 0x1B164, 0x1B167,
0x1B170, 0x1B2FB, 0x1BC00, 0x1BC6A, 0x1BC70, 0x1BC7C, 0x1BC80, 0x1BC88,
0x1BC90, 0x1BC99, 0x1D400, 0x1D454, 0x1D456, 0x1D49C, 0x1D49E, 0x1D49F,
0x1D4A2, 0x1D4A2, 0x1D4A5, 0x1D4A6, 0x1D4A9, 0x1D4AC, 0x1D4AE, 0x1D4B9,
0x1D4BB, 0x1D4BB, 0x1D4BD, 0x1D4C3, 0x1D4C5, 0x1D505, 0x1D507, 0x1D50A,
0x1D50D, 0x1D514, 0x1D516, 0x1D51C, 0x1D51E, 0x1D539, 0x1D53B, 0x1D53E,
0x1D540, 0x1D544, 0x1D546, 0x1D546, 0x1D54A, 0x1D550, 0x1D552, 0x1D6A5,
0x1D6A8, 0x1D6C0, 0x1D6C2, 0x1D6DA, 0x1D6DC, 0x1D6FA, 0x1D6FC, 0x1D714,
0x1D716, 0x1D734, 0x1D736, 0x1D74E, 0x1D750, 0x1D76E, 0x1D770, 0x1D788,
0x1D78A, 0x1D7A8, 0x1D7AA, 0x1D7C2, 0x1D7C4, 0x1D7CB, 0x1DF00, 0x1DF1E,
0x1DF25, 0x1DF2A, 0x1E030, 0x1E06D, 0x1E100, 0x1E12C, 0x1E137, 0x1E13D,
0x1E14E, 0x1E14E, 0x1E290, 0x1E2AD, 0x1E2C0, 0x1E2EB, 0x1E4D0, 0x1E4EB,
0x1E7E0, 0x1E7E6, 0x1E7E8, 0x1E7EB, 0x1E7ED, 0x1E7EE, 0x1E7F0, 0x1E7FE,
0x1E800, 0x1E8C4, 0x1E900, 0x1E943, 0x1E94B, 0x1E94B, 0x1EE00, 0x1EE03,
0x1EE05, 0x1EE1F, 0x1EE21, 0x1EE22, 0x1EE24, 0x1EE24, 0x1EE27, 0x1EE27,
0x1EE29, 0x1EE32, 0x1EE34, 0x1EE37, 0x1EE39, 0x1EE39, 0x1EE3B, 0x1EE3B,
0x1EE42, 0x1EE42, 0x1EE47, 0x1EE47, 0x1EE49, 0x1EE49, 0x1EE4B, 0x1EE4B,
0x1EE4D, 0x1EE4F, 0x1EE51, 0x1EE52, 0x1EE54, 0x1EE54, 0x1EE57, 0x1EE57,
0x1EE59, 0x1EE59, 0x1EE5B, 0x1EE5B, 0x1EE5D, 0x1EE5D, 0x1EE5F, 0x1EE5F,
0x1EE61, 0x1EE62, 0x1EE64, 0x1EE64, 0x1EE67, 0x1EE6A, 0x1EE6C, 0x1EE72,
0x1EE74, 0x1EE77, 0x1EE79, 0x1EE7C, 0x1EE7E, 0x1EE7E, 0x1EE80, 0x1EE89,
0x1EE8B, 0x1EE9B, 0x1EEA1, 0x1EEA3, 0x1EEA5, 0x1EEA9, 0x1EEAB, 0x1EEBB,
0x20000, 0x2A6DF, 0x2A700, 0x2B739, 0x2B740, 0x2B81D, 0x2B820, 0x2CEA1,
0x2CEB0, 0x2EBE0, 0x2EBF0, 0x2EE5D, 0x2F800, 0x2FA1D, 0x30000, 0x3134A,
0x31350, 0x323AF, -1,
};
return in_ordered_range(range, c);
}
// Returns true if a given character is acceptable as a non-first
// character of an identifier.
//
// Non-ASCII characters correspond to XID_Continue set of Unicode 15.1.
bool is_ident2(uint32_t c) {
static uint32_t range[] = {
'0', '9', 0x00B7, 0x00B7, 0x0300, 0x036F, 0x0387, 0x0387,
0x0483, 0x0487, 0x0591, 0x05BD, 0x05BF, 0x05BF, 0x05C1, 0x05C2,
0x05C4, 0x05C5, 0x05C7, 0x05C7, 0x0610, 0x061A, 0x064B, 0x0669,
0x0670, 0x0670, 0x06D6, 0x06DC, 0x06DF, 0x06E4, 0x06E7, 0x06E8,
0x06EA, 0x06ED, 0x06F0, 0x06F9, 0x0711, 0x0711, 0x0730, 0x074A,
0x07A6, 0x07B0, 0x07C0, 0x07C9, 0x07EB, 0x07F3, 0x07FD, 0x07FD,
0x0816, 0x0819, 0x081B, 0x0823, 0x0825, 0x0827, 0x0829, 0x082D,
0x0859, 0x085B, 0x0898, 0x089F, 0x08CA, 0x08E1, 0x08E3, 0x0903,
0x093A, 0x093C, 0x093E, 0x094F, 0x0951, 0x0957, 0x0962, 0x0963,
0x0966, 0x096F, 0x0981, 0x0983, 0x09BC, 0x09BC, 0x09BE, 0x09C4,
0x09C7, 0x09C8, 0x09CB, 0x09CD, 0x09D7, 0x09D7, 0x09E2, 0x09E3,
0x09E6, 0x09EF, 0x09FE, 0x09FE, 0x0A01, 0x0A03, 0x0A3C, 0x0A3C,
0x0A3E, 0x0A42, 0x0A47, 0x0A48, 0x0A4B, 0x0A4D, 0x0A51, 0x0A51,
0x0A66, 0x0A71, 0x0A75, 0x0A75, 0x0A81, 0x0A83, 0x0ABC, 0x0ABC,
0x0ABE, 0x0AC5, 0x0AC7, 0x0AC9, 0x0ACB, 0x0ACD, 0x0AE2, 0x0AE3,
0x0AE6, 0x0AEF, 0x0AFA, 0x0AFF, 0x0B01, 0x0B03, 0x0B3C, 0x0B3C,
0x0B3E, 0x0B44, 0x0B47, 0x0B48, 0x0B4B, 0x0B4D, 0x0B55, 0x0B57,
0x0B62, 0x0B63, 0x0B66, 0x0B6F, 0x0B82, 0x0B82, 0x0BBE, 0x0BC2,
0x0BC6, 0x0BC8, 0x0BCA, 0x0BCD, 0x0BD7, 0x0BD7, 0x0BE6, 0x0BEF,
0x0C00, 0x0C04, 0x0C3C, 0x0C3C, 0x0C3E, 0x0C44, 0x0C46, 0x0C48,
0x0C4A, 0x0C4D, 0x0C55, 0x0C56, 0x0C62, 0x0C63, 0x0C66, 0x0C6F,
0x0C81, 0x0C83, 0x0CBC, 0x0CBC, 0x0CBE, 0x0CC4, 0x0CC6, 0x0CC8,
0x0CCA, 0x0CCD, 0x0CD5, 0x0CD6, 0x0CE2, 0x0CE3, 0x0CE6, 0x0CEF,
0x0CF3, 0x0CF3, 0x0D00, 0x0D03, 0x0D3B, 0x0D3C, 0x0D3E, 0x0D44,
0x0D46, 0x0D48, 0x0D4A, 0x0D4D, 0x0D57, 0x0D57, 0x0D62, 0x0D63,
0x0D66, 0x0D6F, 0x0D81, 0x0D83, 0x0DCA, 0x0DCA, 0x0DCF, 0x0DD4,
0x0DD6, 0x0DD6, 0x0DD8, 0x0DDF, 0x0DE6, 0x0DEF, 0x0DF2, 0x0DF3,
0x0E31, 0x0E31, 0x0E33, 0x0E3A, 0x0E47, 0x0E4E, 0x0E50, 0x0E59,
0x0EB1, 0x0EB1, 0x0EB3, 0x0EBC, 0x0EC8, 0x0ECE, 0x0ED0, 0x0ED9,
0x0F18, 0x0F19, 0x0F20, 0x0F29, 0x0F35, 0x0F35, 0x0F37, 0x0F37,
0x0F39, 0x0F39, 0x0F3E, 0x0F3F, 0x0F71, 0x0F84, 0x0F86, 0x0F87,
0x0F8D, 0x0F97, 0x0F99, 0x0FBC, 0x0FC6, 0x0FC6, 0x102B, 0x103E,
0x1040, 0x1049, 0x1056, 0x1059, 0x105E, 0x1060, 0x1062, 0x1064,
0x1067, 0x106D, 0x1071, 0x1074, 0x1082, 0x108D, 0x108F, 0x109D,
0x135D, 0x135F, 0x1369, 0x1371, 0x1712, 0x1715, 0x1732, 0x1734,
0x1752, 0x1753, 0x1772, 0x1773, 0x17B4, 0x17D3, 0x17DD, 0x17DD,
0x17E0, 0x17E9, 0x180B, 0x180D, 0x180F, 0x1819, 0x18A9, 0x18A9,
0x1920, 0x192B, 0x1930, 0x193B, 0x1946, 0x194F, 0x19D0, 0x19DA,
0x1A17, 0x1A1B, 0x1A55, 0x1A5E, 0x1A60, 0x1A7C, 0x1A7F, 0x1A89,
0x1A90, 0x1A99, 0x1AB0, 0x1ABD, 0x1ABF, 0x1ACE, 0x1B00, 0x1B04,
0x1B34, 0x1B44, 0x1B50, 0x1B59, 0x1B6B, 0x1B73, 0x1B80, 0x1B82,
0x1BA1, 0x1BAD, 0x1BB0, 0x1BB9, 0x1BE6, 0x1BF3, 0x1C24, 0x1C37,
0x1C40, 0x1C49, 0x1C50, 0x1C59, 0x1CD0, 0x1CD2, 0x1CD4, 0x1CE8,
0x1CED, 0x1CED, 0x1CF4, 0x1CF4, 0x1CF7, 0x1CF9, 0x1DC0, 0x1DFF,
0x200C, 0x200D, 0x203F, 0x2040, 0x2054, 0x2054, 0x20D0, 0x20DC,
0x20E1, 0x20E1, 0x20E5, 0x20F0, 0x2CEF, 0x2CF1, 0x2D7F, 0x2D7F,
0x2DE0, 0x2DFF, 0x302A, 0x302F, 0x3099, 0x309A, 0x30FB, 0x30FB,
0xA620, 0xA629, 0xA66F, 0xA66F, 0xA674, 0xA67D, 0xA69E, 0xA69F,
0xA6F0, 0xA6F1, 0xA802, 0xA802, 0xA806, 0xA806, 0xA80B, 0xA80B,
0xA823, 0xA827, 0xA82C, 0xA82C, 0xA880, 0xA881, 0xA8B4, 0xA8C5,
0xA8D0, 0xA8D9, 0xA8E0, 0xA8F1, 0xA8FF, 0xA909, 0xA926, 0xA92D,
0xA947, 0xA953, 0xA980, 0xA983, 0xA9B3, 0xA9C0, 0xA9D0, 0xA9D9,
0xA9E5, 0xA9E5, 0xA9F0, 0xA9F9, 0xAA29, 0xAA36, 0xAA43, 0xAA43,
0xAA4C, 0xAA4D, 0xAA50, 0xAA59, 0xAA7B, 0xAA7D, 0xAAB0, 0xAAB0,
0xAAB2, 0xAAB4, 0xAAB7, 0xAAB8, 0xAABE, 0xAABF, 0xAAC1, 0xAAC1,
0xAAEB, 0xAAEF, 0xAAF5, 0xAAF6, 0xABE3, 0xABEA, 0xABEC, 0xABED,
0xABF0, 0xABF9, 0xFB1E, 0xFB1E, 0xFE00, 0xFE0F, 0xFE20, 0xFE2F,
0xFE33, 0xFE34, 0xFE4D, 0xFE4F, 0xFF10, 0xFF19, 0xFF3F, 0xFF3F,
0xFF65, 0xFF65, 0xFF9E, 0xFF9F, 0x101FD, 0x101FD, 0x102E0, 0x102E0,
0x10376, 0x1037A, 0x104A0, 0x104A9, 0x10A01, 0x10A03, 0x10A05, 0x10A06,
0x10A0C, 0x10A0F, 0x10A38, 0x10A3A, 0x10A3F, 0x10A3F, 0x10AE5, 0x10AE6,
0x10D24, 0x10D27, 0x10D30, 0x10D39, 0x10EAB, 0x10EAC, 0x10EFD, 0x10EFF,
0x10F46, 0x10F50, 0x10F82, 0x10F85, 0x11000, 0x11002, 0x11038, 0x11046,
0x11066, 0x11070, 0x11073, 0x11074, 0x1107F, 0x11082, 0x110B0, 0x110BA,
0x110C2, 0x110C2, 0x110F0, 0x110F9, 0x11100, 0x11102, 0x11127, 0x11134,
0x11136, 0x1113F, 0x11145, 0x11146, 0x11173, 0x11173, 0x11180, 0x11182,
0x111B3, 0x111C0, 0x111C9, 0x111CC, 0x111CE, 0x111D9, 0x1122C, 0x11237,
0x1123E, 0x1123E, 0x11241, 0x11241, 0x112DF, 0x112EA, 0x112F0, 0x112F9,
0x11300, 0x11303, 0x1133B, 0x1133C, 0x1133E, 0x11344, 0x11347, 0x11348,
0x1134B, 0x1134D, 0x11357, 0x11357, 0x11362, 0x11363, 0x11366, 0x1136C,
0x11370, 0x11374, 0x11435, 0x11446, 0x11450, 0x11459, 0x1145E, 0x1145E,
0x114B0, 0x114C3, 0x114D0, 0x114D9, 0x115AF, 0x115B5, 0x115B8, 0x115C0,
0x115DC, 0x115DD, 0x11630, 0x11640, 0x11650, 0x11659, 0x116AB, 0x116B7,
0x116C0, 0x116C9, 0x1171D, 0x1172B, 0x11730, 0x11739, 0x1182C, 0x1183A,
0x118E0, 0x118E9, 0x11930, 0x11935, 0x11937, 0x11938, 0x1193B, 0x1193E,
0x11940, 0x11940, 0x11942, 0x11943, 0x11950, 0x11959, 0x119D1, 0x119D7,
0x119DA, 0x119E0, 0x119E4, 0x119E4, 0x11A01, 0x11A0A, 0x11A33, 0x11A39,
0x11A3B, 0x11A3E, 0x11A47, 0x11A47, 0x11A51, 0x11A5B, 0x11A8A, 0x11A99,
0x11C2F, 0x11C36, 0x11C38, 0x11C3F, 0x11C50, 0x11C59, 0x11C92, 0x11CA7,
0x11CA9, 0x11CB6, 0x11D31, 0x11D36, 0x11D3A, 0x11D3A, 0x11D3C, 0x11D3D,
0x11D3F, 0x11D45, 0x11D47, 0x11D47, 0x11D50, 0x11D59, 0x11D8A, 0x11D8E,
0x11D90, 0x11D91, 0x11D93, 0x11D97, 0x11DA0, 0x11DA9, 0x11EF3, 0x11EF6,
0x11F00, 0x11F01, 0x11F03, 0x11F03, 0x11F34, 0x11F3A, 0x11F3E, 0x11F42,
0x11F50, 0x11F59, 0x13440, 0x13440, 0x13447, 0x13455, 0x16A60, 0x16A69,
0x16AC0, 0x16AC9, 0x16AF0, 0x16AF4, 0x16B30, 0x16B36, 0x16B50, 0x16B59,
0x16F4F, 0x16F4F, 0x16F51, 0x16F87, 0x16F8F, 0x16F92, 0x16FE4, 0x16FE4,
0x16FF0, 0x16FF1, 0x1BC9D, 0x1BC9E, 0x1CF00, 0x1CF2D, 0x1CF30, 0x1CF46,
0x1D165, 0x1D169, 0x1D16D, 0x1D172, 0x1D17B, 0x1D182, 0x1D185, 0x1D18B,
0x1D1AA, 0x1D1AD, 0x1D242, 0x1D244, 0x1D7CE, 0x1D7FF, 0x1DA00, 0x1DA36,
0x1DA3B, 0x1DA6C, 0x1DA75, 0x1DA75, 0x1DA84, 0x1DA84, 0x1DA9B, 0x1DA9F,
0x1DAA1, 0x1DAAF, 0x1E000, 0x1E006, 0x1E008, 0x1E018, 0x1E01B, 0x1E021,
0x1E023, 0x1E024, 0x1E026, 0x1E02A, 0x1E08F, 0x1E08F, 0x1E130, 0x1E136,
0x1E140, 0x1E149, 0x1E2AE, 0x1E2AE, 0x1E2EC, 0x1E2F9, 0x1E4EC, 0x1E4F9,
0x1E8D0, 0x1E8D6, 0x1E944, 0x1E94A, 0x1E950, 0x1E959, 0x1FBF0, 0x1FBF9,
0xE0100, 0xE01EF, -1,
};
return is_ident1(c) || in_ordered_range(range, c);
}
// Returns the number of columns needed to display a given
// character in a fixed-width font.
//
// Based on https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
static int char_width(uint32_t c) {
static uint32_t range1[] = {
0x0000, 0x001F, 0x007f, 0x00a0, 0x0300, 0x036F, 0x0483, 0x0486,
0x0488, 0x0489, 0x0591, 0x05BD, 0x05BF, 0x05BF, 0x05C1, 0x05C2,
0x05C4, 0x05C5, 0x05C7, 0x05C7, 0x0600, 0x0603, 0x0610, 0x0615,
0x064B, 0x065E, 0x0670, 0x0670, 0x06D6, 0x06E4, 0x06E7, 0x06E8,
0x06EA, 0x06ED, 0x070F, 0x070F, 0x0711, 0x0711, 0x0730, 0x074A,
0x07A6, 0x07B0, 0x07EB, 0x07F3, 0x0901, 0x0902, 0x093C, 0x093C,
0x0941, 0x0948, 0x094D, 0x094D, 0x0951, 0x0954, 0x0962, 0x0963,
0x0981, 0x0981, 0x09BC, 0x09BC, 0x09C1, 0x09C4, 0x09CD, 0x09CD,
0x09E2, 0x09E3, 0x0A01, 0x0A02, 0x0A3C, 0x0A3C, 0x0A41, 0x0A42,
0x0A47, 0x0A48, 0x0A4B, 0x0A4D, 0x0A70, 0x0A71, 0x0A81, 0x0A82,
0x0ABC, 0x0ABC, 0x0AC1, 0x0AC5, 0x0AC7, 0x0AC8, 0x0ACD, 0x0ACD,
0x0AE2, 0x0AE3, 0x0B01, 0x0B01, 0x0B3C, 0x0B3C, 0x0B3F, 0x0B3F,
0x0B41, 0x0B43, 0x0B4D, 0x0B4D, 0x0B56, 0x0B56, 0x0B82, 0x0B82,
0x0BC0, 0x0BC0, 0x0BCD, 0x0BCD, 0x0C3E, 0x0C40, 0x0C46, 0x0C48,
0x0C4A, 0x0C4D, 0x0C55, 0x0C56, 0x0CBC, 0x0CBC, 0x0CBF, 0x0CBF,
0x0CC6, 0x0CC6, 0x0CCC, 0x0CCD, 0x0CE2, 0x0CE3, 0x0D41, 0x0D43,
0x0D4D, 0x0D4D, 0x0DCA, 0x0DCA, 0x0DD2, 0x0DD4, 0x0DD6, 0x0DD6,
0x0E31, 0x0E31, 0x0E34, 0x0E3A, 0x0E47, 0x0E4E, 0x0EB1, 0x0EB1,
0x0EB4, 0x0EB9, 0x0EBB, 0x0EBC, 0x0EC8, 0x0ECD, 0x0F18, 0x0F19,
0x0F35, 0x0F35, 0x0F37, 0x0F37, 0x0F39, 0x0F39, 0x0F71, 0x0F7E,
0x0F80, 0x0F84, 0x0F86, 0x0F87, 0x0F90, 0x0F97, 0x0F99, 0x0FBC,
0x0FC6, 0x0FC6, 0x102D, 0x1030, 0x1032, 0x1032, 0x1036, 0x1037,
0x1039, 0x1039, 0x1058, 0x1059, 0x1160, 0x11FF, 0x135F, 0x135F,
0x1712, 0x1714, 0x1732, 0x1734, 0x1752, 0x1753, 0x1772, 0x1773,
0x17B4, 0x17B5, 0x17B7, 0x17BD, 0x17C6, 0x17C6, 0x17C9, 0x17D3,
0x17DD, 0x17DD, 0x180B, 0x180D, 0x18A9, 0x18A9, 0x1920, 0x1922,
0x1927, 0x1928, 0x1932, 0x1932, 0x1939, 0x193B, 0x1A17, 0x1A18,
0x1B00, 0x1B03, 0x1B34, 0x1B34, 0x1B36, 0x1B3A, 0x1B3C, 0x1B3C,
0x1B42, 0x1B42, 0x1B6B, 0x1B73, 0x1DC0, 0x1DCA, 0x1DFE, 0x1DFF,
0x200B, 0x200F, 0x202A, 0x202E, 0x2060, 0x2063, 0x206A, 0x206F,
0x20D0, 0x20EF, 0x302A, 0x302F, 0x3099, 0x309A, 0xA806, 0xA806,
0xA80B, 0xA80B, 0xA825, 0xA826, 0xFB1E, 0xFB1E, 0xFE00, 0xFE0F,
0xFE20, 0xFE23, 0xFEFF, 0xFEFF, 0xFFF9, 0xFFFB, 0x10A01, 0x10A03,
0x10A05, 0x10A06, 0x10A0C, 0x10A0F, 0x10A38, 0x10A3A, 0x10A3F, 0x10A3F,
0x1D167, 0x1D169, 0x1D173, 0x1D182, 0x1D185, 0x1D18B, 0x1D1AA, 0x1D1AD,
0x1D242, 0x1D244, 0xE0001, 0xE0001, 0xE0020, 0xE007F, 0xE0100, 0xE01EF,
-1,
};
if (in_ordered_range(range1, c))
return 0;
static uint32_t range2[] = {
0x1100, 0x115F, 0x2329, 0x2329, 0x232A, 0x232A, 0x2E80, 0x303E,
0x3040, 0xA4CF, 0xAC00, 0xD7A3, 0xF900, 0xFAFF, 0xFE10, 0xFE19,
0xFE30, 0xFE6F, 0xFF00, 0xFF60, 0xFFE0, 0xFFE6, 0x1F000, 0x1F644,
0x20000, 0x2FFFD, 0x30000, 0x3FFFD, -1,
};
if (in_ordered_range(range2, c))
return 2;
return 1;
}
// Returns the number of columns needed to display a given
// string in a fixed-width font.
int display_width(char *p, int len) {
char *start = p;
int w = 0;
while (p - start < len) {
if (*p == '\t') {
w += 8;
p++;
continue;
}
uint32_t c = decode_utf8(&p, p);
w += char_width(c);
}
return w;
}