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40be47e0fa
* refactor: format all C files under nvim
* refactor: disable formatting for Vim-owned files:
* src/nvim/indent_c.c
* src/nvim/regexp.c
* src/nvim/regexp_nfa.c
* src/nvim/testdir/samples/memfile_test.c
40 lines
741 B
C
40 lines
741 B
C
// This is an open source non-commercial project. Dear PVS-Studio, please check
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// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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#include <math.h>
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#include <stdint.h>
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#include <string.h>
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#include "nvim/math.h"
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#ifdef INCLUDE_GENERATED_DECLARATIONS
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# include "math.c.generated.h"
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#endif
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int xfpclassify(double d)
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{
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uint64_t m;
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int e;
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memcpy(&m, &d, sizeof(m));
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e = 0x7ff & (m >> 52);
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m = 0xfffffffffffffULL & m;
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switch (e) {
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default:
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return FP_NORMAL;
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case 0x000:
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return m ? FP_SUBNORMAL : FP_ZERO;
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case 0x7ff:
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return m ? FP_NAN : FP_INFINITE;
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}
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}
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int xisinf(double d)
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{
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return FP_INFINITE == xfpclassify(d);
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}
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int xisnan(double d)
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{
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return FP_NAN == xfpclassify(d);
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}
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