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annotate src/build-msvctools/math/isinf.c @ 3061:f8299bb6c872

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Initial support for native MSVC compilation. * add MSVC support files: compiler wrappers and support libraries * adapt libiconv to work with MSVC * adapt gettext to work with MSVC
author Michael Goffioul <michael.goffioul@gmail.com>
date Mon, 17 Jun 2013 22:43:11 -0400
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3061
f8299bb6c872 Initial support for native MSVC compilation.
Michael Goffioul <michael.goffioul@gmail.com>
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1 #define __STDC__ 1
f8299bb6c872 Initial support for native MSVC compilation.
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2
f8299bb6c872 Initial support for native MSVC compilation.
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3 #include <math.h>
f8299bb6c872 Initial support for native MSVC compilation.
Michael Goffioul <michael.goffioul@gmail.com>
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4 #include <float.h>
f8299bb6c872 Initial support for native MSVC compilation.
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5
f8299bb6c872 Initial support for native MSVC compilation.
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6 int isinf (double x)
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7 {
f8299bb6c872 Initial support for native MSVC compilation.
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8 int c = (_fpclass (x) & (_FPCLASS_PINF | _FPCLASS_NINF));
f8299bb6c872 Initial support for native MSVC compilation.
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9
f8299bb6c872 Initial support for native MSVC compilation.
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10 return (c == _FPCLASS_PINF ? 1
f8299bb6c872 Initial support for native MSVC compilation.
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11 : c == _FPCLASS_NINF ? -1 : 0);
f8299bb6c872 Initial support for native MSVC compilation.
Michael Goffioul <michael.goffioul@gmail.com>
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12 }