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

StringUtil: Add StrideMemCpy/StrideMemCmp

This commit is contained in:
Connor McLaughlin 2021-02-05 02:16:15 +10:00
parent d4997c6fb9
commit 7b4650700f
1 changed files with 31 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
src/common/string_util.h
View File

@ -129,6 +129,37 @@ ALWAYS_INLINE static bool EndsWith(const std::string_view& str, const char* suff
return (str.length() >= suffix_length && str.compare(str.length() - suffix_length, suffix_length, suffix) == 0);
}
/// Strided memcpy/memcmp.
ALWAYS_INLINE static void StrideMemCpy(void* dst, std::size_t dst_stride, const void* src, std::size_t src_stride,
std::size_t copy_size, std::size_t count)
{
const u8* src_ptr = static_cast<const u8*>(src);
u8* dst_ptr = static_cast<u8*>(dst);
for (std::size_t i = 0; i < count; i++)
{
std::memcpy(dst_ptr, src_ptr, copy_size);
src_ptr += src_stride;
dst_ptr += dst_stride;
}
}
ALWAYS_INLINE static int StrideMemCmp(const void* p1, std::size_t p1_stride, const void* p2, std::size_t p2_stride,
std::size_t copy_size, std::size_t count)
{
const u8* p1_ptr = static_cast<const u8*>(p1);
const u8* p2_ptr = static_cast<const u8*>(p2);
for (std::size_t i = 0; i < count; i++)
{
int result = std::memcmp(p1_ptr, p2_ptr, copy_size);
if (result != 0)
return result;
p2_ptr += p2_stride;
p1_ptr += p1_stride;
}
return 0;
}
#ifdef WIN32
/// Converts the specified UTF-8 string to a wide string.