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#if defined(GB_SYSTEM_WINDOWS)
#pragma warning(push)
#pragma warning(disable: 4245)
#endif
extern "C" {
#include "utf8proc/utf8proc.c"
}
#if defined(GB_SYSTEM_WINDOWS)
#pragma warning(pop)
#endif
gb_internal bool rune_is_letter(Rune r) {
if (r < 0x80) {
if (r == '_') {
return true;
}
return ((cast(u32)r | 0x20) - 0x61) < 26;
}
switch (utf8proc_category(r)) {
case UTF8PROC_CATEGORY_LU:
case UTF8PROC_CATEGORY_LL:
case UTF8PROC_CATEGORY_LT:
case UTF8PROC_CATEGORY_LM:
case UTF8PROC_CATEGORY_LO:
return true;
}
return false;
}
gb_internal bool rune_is_digit(Rune r) {
if (r < 0x80) {
return (cast(u32)r - '0') < 10;
}
return utf8proc_category(r) == UTF8PROC_CATEGORY_ND;
}
gb_internal bool rune_is_letter_or_digit(Rune r) {
if (r < 0x80) {
if (r == '_') {
return true;
}
if (((cast(u32)r | 0x20) - 0x61) < 26) {
return true;
}
return (cast(u32)r - '0') < 10;
}
switch (utf8proc_category(r)) {
case UTF8PROC_CATEGORY_LU:
case UTF8PROC_CATEGORY_LL:
case UTF8PROC_CATEGORY_LT:
case UTF8PROC_CATEGORY_LM:
case UTF8PROC_CATEGORY_LO:
return true;
case UTF8PROC_CATEGORY_ND:
return true;
}
return false;
}
gb_internal bool rune_is_whitespace(Rune r) {
switch (r) {
case ' ':
case '\t':
case '\n':
case '\r':
return true;
}
return false;
}
gb_global u8 const global__utf8_first[256] = {
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x00-0x0F
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x10-0x1F
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x20-0x2F
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x30-0x3F
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x40-0x4F
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x50-0x5F
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x60-0x6F
0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, // 0x70-0x7F
0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, // 0x80-0x8F
0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, // 0x90-0x9F
0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, // 0xA0-0xAF
0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, // 0xB0-0xBF
0xf1, 0xf1, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xC0-0xCF
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xD0-0xDF
0x13, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x23, 0x03, 0x03, // 0xE0-0xEF
0x34, 0x04, 0x04, 0x04, 0x44, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, // 0xF0-0xFF
};
typedef struct Utf8AcceptRange {
u8 lo, hi;
} Utf8AcceptRange;
gb_global Utf8AcceptRange const global__utf8_accept_ranges[] = {
{0x80, 0xbf},
{0xa0, 0xbf},
{0x80, 0x9f},
{0x90, 0xbf},
{0x80, 0x8f},
};
gb_internal isize utf8_decode(u8 const *str, isize str_len, Rune *codepoint_out) {
isize width = 0;
Rune codepoint = GB_RUNE_INVALID;
if (str_len > 0) {
u8 s0 = str[0];
u8 x = global__utf8_first[s0], sz;
u8 b1, b2, b3;
Utf8AcceptRange accept;
if (x >= 0xf0) {
Rune mask = -cast(Rune)(x & 1);
codepoint = (cast(Rune)s0 & (~mask)) | (GB_RUNE_INVALID & mask);
width = 1;
goto end;
}
if (s0 < 0x80) {
codepoint = s0;
width = 1;
goto end;
}
sz = x&7;
accept = global__utf8_accept_ranges[x>>4];
if (str_len < gb_size_of(sz))
goto invalid_codepoint;
b1 = str[1];
if (b1 < accept.lo || accept.hi < b1)
goto invalid_codepoint;
if (sz == 2) {
codepoint = (cast(Rune)s0&0x1f)<<6 | (cast(Rune)b1&0x3f);
width = 2;
goto end;
}
b2 = str[2];
if (!gb_is_between(b2, 0x80, 0xbf))
goto invalid_codepoint;
if (sz == 3) {
codepoint = (cast(Rune)s0&0x1f)<<12 | (cast(Rune)b1&0x3f)<<6 | (cast(Rune)b2&0x3f);
width = 3;
goto end;
}
b3 = str[3];
if (!gb_is_between(b3, 0x80, 0xbf))
goto invalid_codepoint;
codepoint = (cast(Rune)s0&0x07)<<18 | (cast(Rune)b1&0x3f)<<12 | (cast(Rune)b2&0x3f)<<6 | (cast(Rune)b3&0x3f);
width = 4;
goto end;
invalid_codepoint:
codepoint = GB_RUNE_INVALID;
width = 1;
}
end:
if (codepoint_out) *codepoint_out = codepoint;
return width;
}
// NOTE(Feoramund): It's down here because I made UCG use the utf8_decode above to avoid duplicating code.
extern "C" {
#include "ucg/ucg.c"
}
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