ShuriZma
/
duckstation
mirror of https://github.com/stenzek/duckstation
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

StringUtil: Add ParseFixedHexString()

This commit is contained in:
Stenzek 2024-11-29 15:04:25 +10:00
parent 2e31a40dda
commit da501b9294
No known key found for this signature in database
2 changed files with 22 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/common/string_util.h
View File

@ -260,6 +260,27 @@ ALWAYS_INLINE static bool IsHexDigit(T ch)
(ch >= static_cast<T>('0') && ch <= static_cast<T>('9')));
}
/// Returns a byte array from the provided hex string, computed at compile-time.
template<size_t Length>
static constexpr std::array<u8, Length> ParseFixedHexString(const char str[])
{
std::array<u8, Length> h{};
for (int i = 0; str[i] != '\0'; i++)
{
u8 nibble = 0;
char ch = str[i];
if (ch >= '0' && ch <= '9')
nibble = str[i] - '0';
else if (ch >= 'a' && ch <= 'z')
nibble = 0xA + (str[i] - 'a');
else if (ch >= 'A' && ch <= 'Z')
nibble = 0xA + (str[i] - 'A');
h[i / 2] |= nibble << (((i & 1) ^ 1) * 4);
}
return h;
}
/// StartsWith/EndsWith variants which aren't case sensitive.
ALWAYS_INLINE static bool StartsWithNoCase(const std::string_view str, const std::string_view prefix)
{

16
src/core/bios.cpp
View File

@ -21,21 +21,7 @@ namespace BIOS {
static constexpr ImageInfo::Hash MakeHashFromString(const char str[])
{
ImageInfo::Hash h{};
for (int i = 0; str[i] != '\0'; i++)
{
u8 nibble = 0;
char ch = str[i];
if (ch >= '0' && ch <= '9')
nibble = str[i] - '0';
else if (ch >= 'a' && ch <= 'z')
nibble = 0xA + (str[i] - 'a');
else if (ch >= 'A' && ch <= 'Z')
nibble = 0xA + (str[i] - 'A');
h[i / 2] |= nibble << (((i & 1) ^ 1) * 4);
}
return h;
return StringUtil::ParseFixedHexString<ImageInfo::HASH_SIZE>(str);
}
// clang-format off