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| author | Jakob Kaivo <jkk@ung.org> | 2019-03-03 21:25:50 -0500 |
|---|---|---|
| committer | Jakob Kaivo <jkk@ung.org> | 2019-03-03 21:25:50 -0500 |
| commit | 06696f40afe58a231e2531c8bf6d9f0dadb92e51 (patch) | |
| tree | b146422c6326ffe3debf3163f0941d8dda0be105 /src/math/modf.c | |
| parent | f20eeea657d62f2ef905627ca3a9094d33af7d40 (diff) | |
outline details from C18 annex F
Diffstat (limited to 'src/math/modf.c')
| -rw-r--r-- | src/math/modf.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/math/modf.c b/src/math/modf.c index fc09fc2d..63db6094 100644 --- a/src/math/modf.c +++ b/src/math/modf.c @@ -6,6 +6,12 @@ /** decompose floating-point numbers **/ TYPE TGFN(modf)(TYPE value, TYPE *iptr) { + switch (fpclassify(value)) { + case FP_INFINITE: *iptr = value; return copysign(0.0, value); + case FP_NAN: *iptr = value; return value; + default: break; + } + if (0) { errno = ERANGE; /* The result cannot be represented */ /* RETURN_FAILURE(CONSTANT(HUGE_VAL), A range error occurred); */ @@ -13,7 +19,6 @@ TYPE TGFN(modf)(TYPE value, TYPE *iptr) } /* RETURN_SUCCESS(the signed fractional part of ARGUMENT(value)); */ - (void)iptr; return value; } |