Adapt libs/pbd/ffs.cc to be buildable with MSVC
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@ -19,14 +19,28 @@
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#include "pbd/ffs.h"
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#include "pbd/ffs.h"
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#ifndef COMPILER_MSVC
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#include <strings.h>
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#include <strings.h>
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#endif
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namespace PBD {
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namespace PBD {
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int
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int
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ffs (int x)
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ffs (int x)
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{
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{
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#if defined(WIN32) && defined(__GNUC__)
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#if defined (COMPILER_MINGW)
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return __builtin_ffs(x);
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return __builtin_ffs(x);
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#elif defined (COMPILER_MSVC)
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unsigned long index;
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#ifdef WIN64
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if (0 != _BitScanForward64(&index, (__int64)x))
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#else
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if (0 != _BitScanForward(&index, (unsigned long)x))
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#endif
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index++; // Make the result 1-based
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else
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index = 0; // All bits were zero
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return (int)index;
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#else
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#else
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return ::ffs(x);
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return ::ffs(x);
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#endif
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#endif
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