From 782236e3bd5982930c22d3cf4955ec76474c8cec Mon Sep 17 00:00:00 2001 From: shyouhei Date: Sat, 20 Jan 2018 03:16:59 +0000 Subject: add missing/nan.c instead of scattering #ifdef HAVE_NANF here and there define our own nan() unless defined elsewhere. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61971 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- missing/nan.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 missing/nan.c (limited to 'missing') diff --git a/missing/nan.c b/missing/nan.c new file mode 100644 index 0000000000..507cc586d2 --- /dev/null +++ b/missing/nan.c @@ -0,0 +1,28 @@ +#include "ruby/missing.h" +#include +#include +#include + +double +nan(const char *spec) +{ +#if 0 + /* FIXME: we have not yet seen any situation this is + * necessary. Please write a proper implementation that + * covers this branch. */ + if (spec && spec[0]) { + double generated_nan; + int len = snprintf(NULL, 0, "NAN(%s)", spec); + char *buf = malloc(len + 1); /* +1 for NUL */ + sprintf(buf, "NAN(%s)", spec); + generated_nan = strtod(buf, NULL); + free(buf); + return generated_nan; + } + else +#endif + { + assert(!spec || !spec[0]); + return (double)NAN; + } +} -- cgit v1.2.3