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Light cleanup for IsValidUTF8

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This commit is contained in:
Kawe Mazidjatari 2023-03-13 21:30:16 +01:00
parent 031eee80a1
commit be3690d0b3
1 changed files with 16 additions and 18 deletions
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34
r5dev/public/utility/utility.cpp
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@ -557,58 +557,56 @@ size_t UTF8CharLength(const uint8_t cInput)
// For checking if input string is a valid UTF-8 encoded string.
bool IsValidUTF8(char* pszString)
{
char v1; // r9
char* v2; // rdx
char v4; // r10
int v5; // er8
char c;
char* it;
while (true)
{
while (true)
{
v1 = *pszString;
v2 = pszString++;
if (v1 < 0)
c = *pszString;
it = pszString++;
if (c < 0)
{
break;
}
if (!v1)
if (!c)
{
return true;
}
}
v4 = *pszString;
char s = *pszString;
if ((*pszString & 0xC0) != 0x80)
{
break;
}
pszString = v2 + 2;
if (v1 >= 0xE0u)
pszString = it + 2;
if (c >= 0xE0u)
{
v5 = *pszString & 0x3F | ((v4 & 0x3F | ((v1 & 0xF) << 6)) << 6);
int n = *pszString & 0x3F | ((s & 0x3F | ((c & 0xF) << 6)) << 6);
if ((*pszString & 0xC0) != 0x80)
{
return false;
}
pszString = v2 + 3;
if (v1 >= 0xF0u)
pszString = it + 3;
if (c >= 0xF0u)
{
if ((*pszString & 0xC0) != 0x80 || ((v5 << 6) | *pszString & 0x3Fu) > 0x10FFFF)
if ((*pszString & 0xC0) != 0x80 || ((n << 6) | *pszString & 0x3Fu) > 0x10FFFF)
{
return false;
}
pszString = v2 + 4;
pszString = it + 4;
}
else if ((v5 - 55296) <= 0x7FF)
else if ((n - 55296) <= 0x7FF)
{
return false;
}
}
else if (v1 < 0xC2u)
else if (c < 0xC2u)
{
return false;
}