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30 lines
490 B
C
30 lines
490 B
C
#ifndef strings_h
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#define strings_h
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/* MSVC doesn't define ffs/ffsl. This dummy strings.h header is provided
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* for both */
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#ifdef _MSC_VER
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# include <intrin.h>
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# pragma intrinsic(_BitScanForward)
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static __forceinline int ffsl(long x)
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{
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unsigned long i;
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if (_BitScanForward(&i, x))
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return (i + 1);
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return (0);
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}
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static __forceinline int ffs(int x)
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{
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return (ffsl(x));
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}
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#else
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# define ffsl(x) __builtin_ffsl(x)
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# define ffs(x) __builtin_ffs(x)
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#endif
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#endif /* strings_h */
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