From 7ef8a7379f7f7d09e71ccae2a0b688c3cd80423f Mon Sep 17 00:00:00 2001 From: Jakob Kaivo Date: Fri, 8 Feb 2019 18:42:39 -0500 Subject: merge sources into single tree --- src/math/acos.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 src/math/acos.c (limited to 'src/math/acos.c') diff --git a/src/math/acos.c b/src/math/acos.c new file mode 100644 index 00000000..a610fe2e --- /dev/null +++ b/src/math/acos.c @@ -0,0 +1,35 @@ +# define TGSOURCE "std/9899-1990/math/acos.c" +#include +#include "errno.h" +#include "nonstd/tgmath.h" + +/** arc cosine **/ +TYPE TGFN(acos)(TYPE x) +{ + if (x < -1 || x > 1) { + errno = EDOM; /* ARGUMENT(x) not in the range [-1, +1] */ + return TGHUGE; + } + + if (0) { + errno = ERANGE; /* The result cannot be represented */ + /* RETURN_FAILURE(CONSTANT(HUGE_VAL), A range error occurred); */ + return TGHUGE; + } + + /* RETURN_SUCCESS(a value in range `[0, PI()]'); */ + return (TYPE)0.0; +} + +/*** +compute the principal value of the arc cosine of ARGUMENT(x), which must be in +the range [-1, +1]. +***/ + +/* +IMPLEMENTATION(The value returned on a domain error, CONSTANT(HUGE_VAL)) +LINK(m) +*/ +/* +STDC(1) +*/ -- cgit v1.2.1