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Detect word size for Windows properly #123

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Detect word size for Windows properly #123

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10 changes: 8 additions & 2 deletions lib/env.h
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Original file line number Diff line number Diff line change
Expand Up @@ -46,12 +46,18 @@
#if defined (__x86_64__)
// This also works for the x32 ABI, which has a 64-bit word size.
# define BASE64_WORDSIZE 64
#elif defined (_INTEGRAL_MAX_BITS)
# define BASE64_WORDSIZE _INTEGRAL_MAX_BITS
#elif defined (__WORDSIZE)
# define BASE64_WORDSIZE __WORDSIZE
#elif defined (__SIZE_WIDTH__)
# define BASE64_WORDSIZE __SIZE_WIDTH__
#elif defined (_WIN32)
// _WIN32 is defined for all Windows targets but _WIN64 is only defined for
// 64-bit targets.
# if defined (_WIN64)
# define BASE64_WORDSIZE 64
# else
# define BASE64_WORDSIZE 32
# endif
#else
# error BASE64_WORDSIZE_NOT_DEFINED
#endif
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