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unicode.c
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#include "slimcc.h"
#define MASK(bits) (uint8_t)((1 << (bits)) - 1)
#define MASK2(bits, shift) (uint8_t)(MASK(bits) << (shift))
typedef struct {
uint32_t first;
uint32_t last;
} UTF32Range;
// 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;
}
static bool in_range(uint32_t c, UTF32Range *range, int len) {
for (int i = 0; i < len; i++) {
if (c > range[i].last)
continue;
if (range[i].first <= 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 UTF32Range 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}
};
return in_range(c, range, sizeof(range) / sizeof(UTF32Range));
}
// 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 UTF32Range 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}
};
return is_ident1(c) || in_range(c, range, sizeof(range) / sizeof(UTF32Range));
}
// 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 UTF32Range 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},
};
if (in_range(c, range1, sizeof(range1) / sizeof(UTF32Range)))
return 0;
static UTF32Range 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}
};
if (in_range(c, range2, sizeof(range2) / sizeof(UTF32Range)))
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;
}