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bswap.h: define GIT_LITTLE_ENDIAN on msvc as little endian

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The Microsoft Visual C++ (MSVC) compiler (as of Visual Studio 2022
version 17.13.6) does not define __BYTE_ORDER__ and its C-library does
not define __BYTE_ORDER. The compiler is supported only on arm64 and x86
which are all little endian.

Define GIT_BYTE_ORDER on msvc as little endian to avoid further checks.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Sebastian Andrzej Siewior 2025-07-15 21:12:27 +02:00 committed by Junio C Hamano
parent f1b8524303
commit 30dea7ddf7
1 changed files with 5 additions and 1 deletions
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6
compat/bswap.h
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@ -81,6 +81,10 @@ static inline uint64_t git_bswap64(uint64_t x)
#define bswap32(x) _byteswap_ulong(x)
#define bswap64(x) _byteswap_uint64(x)
#define GIT_LITTLE_ENDIAN 1234
#define GIT_BIG_ENDIAN 4321
#define GIT_BYTE_ORDER GIT_LITTLE_ENDIAN
#endif
#if defined(bswap32)
@ -122,7 +126,7 @@ static inline uint64_t git_bswap64(uint64_t x)
# define GIT_LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
# define GIT_BIG_ENDIAN __ORDER_BIG_ENDIAN__
#else
#elif !defined(GIT_BYTE_ORDER)
# define GIT_BIG_ENDIAN 4321
# define GIT_LITTLE_ENDIAN 1234