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Misc. CRC32 cleaning #189

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merged 3 commits into from
Dec 28, 2023
Merged

Misc. CRC32 cleaning #189

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83a710b
use the C++11 alignof operator instead of compiler specific code
robUx4 Dec 28, 2023
b4b56a6
don't export the CRC32 table
robUx4 Dec 28, 2023
1f43ee3
crc32: rename m_tab to s_tab as it's a static local table
robUx4 Dec 28, 2023
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9 changes: 1 addition & 8 deletions ebml/EbmlCrc32.h
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,6 @@ DECLARE_EBML_BINARY(EbmlCrc32)
void ResetCRC();
void UpdateByte(binary b);

static const std::array<std::uint32_t, 256> m_tab;
std::uint32_t m_crc;
std::uint32_t m_crc_final{0};

Expand All @@ -71,13 +70,7 @@ DECLARE_EBML_BINARY(EbmlCrc32)
template <class T>
inline unsigned int GetAlignment(T * /* dummy */=nullptr) // VC60 workaround
{
#if defined(_MSC_VER) && (_MSC_VER >= 1300)
return __alignof(T);
#elif defined(__GNUC__)
return __alignof__(T);
#else
return sizeof(T);
#endif
return alignof(T);
}

template <class T>
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2 changes: 1 addition & 1 deletion src/EbmlCrc32.cpp
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Expand Up @@ -27,7 +27,7 @@ namespace libebml {

DEFINE_EBML_CLASS_GLOBAL(EbmlCrc32, 0xBF, 1, "EBMLCrc32\0ratamadabapa")

constexpr std::array<std::uint32_t, 256> EbmlCrc32::m_tab {
static constexpr std::array<std::uint32_t, 256> m_tab {
#ifdef WORDS_BIGENDIAN
0x00000000L, 0x96300777L, 0x2c610eeeL, 0xba510999L, 0x19c46d07L,
0x8ff46a70L, 0x35a563e9L, 0xa395649eL, 0x3288db0eL, 0xa4b8dc79L,
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