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utf: fix some more bugs

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It's beginning to actually work, wow
This commit is contained in:
anna 2021-07-14 22:19:33 +02:00
parent b8471c6d76
commit c70068f1b8
Signed by: fef
GPG key ID: EC22E476DC2D3D84
1 changed files with 5 additions and 5 deletions
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10
src/string/utf.c
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@ -127,11 +127,11 @@ usize utf8_to_nchr(nchar *dest, const char *restrict _utf8chr, error *err)
0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 3, 3, 4, 0,
};
/* Payload bitmask for first byte in the sequence per sequence length */
static const char cmasks[] = { 0x00, 0x7f, 0x1f, 0x0f, 0x07 };
static const char cmasks[] = { 0x00, 0x7f, 0x1f, 0x0f, 0x07 };
/* Minimum Unicode values per sequence length */
static const nchar mins[] = { 0xffffffff, 0x00, 0x80, 0x800, 0x10000 };
static const nchar mins[] = { 0x00, 0x00, 0x80, 0x800, 0x10000 };
/* Error bitmasks for (unused) bytes 2-4 per sequence length */
static const uint_fast8_t emasks[] = { 0x00, 0x03, 0x07, 0x3f, 0xff };
static const uint_fast8_t emasks[] = { 0x03, 0x03, 0x07, 0x3f, 0xff };
/* signed bitshifts are a bad idea, trust me */
const u8 *restrict utf8chr = (const u8 *restrict)_utf8chr;
@ -156,7 +156,7 @@ usize utf8_to_nchr(nchar *dest, const char *restrict _utf8chr, error *err)
case 4:
c = (nchar)(utf8chr[3] & 0x3f); /* 10xx xxxx */
cshift += 6;
eflags |= utf8chr[3];
eflags |= utf8chr[3] & 0xc0;
/* fall through */
case 3:
c |= (nchar)(utf8chr[2] & 0x3f) << cshift; /* 10xx xxxx */
@ -177,7 +177,7 @@ usize utf8_to_nchr(nchar *dest, const char *restrict _utf8chr, error *err)
}
/* UTF-8 mandates each char be stored in as few bytes as possible */
eflags = c < mins[len];
eflags |= c < mins[len];
/*
* Bytes 7-2 in eflags store the respective 2 MSBs of each tail byte