delta/ruby.git/include/ruby/missing.h, branch ruby_2_4

merge revision(s) 63571,63572: [Backport #14816]

2018-07-30T13:57:35+00:00

	`int isnan(double)` is a POSIXism

	- `isnan` is something relatively new.  We need to provide one for
	  those systems without it.  However:
	- X/Open defines `int isnan(double)`. Note the `int`.
	- C99 defines `isnan(x)` to be a macro.
	- C++11 nukes them all, undefines all the "masking macro"s, and
	  defines its own `bool isnan(double)`.  Note the `bool`.
	- In C++, `int isnan(double)` and `bool isnan(double)` are
	  incompatible.
	- So the mess.

	[Bug #14816][ruby-core:87364]
	further reading: https://developers.redhat.com/blog/2016/02/29/why-cstdlib-is-more-complicated-than-you-might-think/


	include/ruby/missing.h: defined(__cplusplus) before using __cplusplus

	* include/ruby/missing.h (isinf, isnan): For non-C++ programs,
	  defined(__cplusplus) may be needed before using __cplusplus.
	  [Bug #14816]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@64126 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

missing.h: isfinite

2016-05-23T12:33:39+00:00

* include/ruby/missing.h (isfinite): move from numeric.c.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55136 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

missing.h: remove explicit_bzero_by_memset_s

2016-01-10T06:45:36+00:00

* include/ruby/missing.h (explicit_bzero_by_memset_s): remove
  inline implementation by memset_s, which needs a macro before
  including headers and can cause problems in extension libraries
  by the order of the macro and headers.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53493 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

missing.h: __STDC_WANT_LIB_EXT1__

2015-12-02T09:17:42+00:00

* include/ruby/missing.h: get rid of redefinition of
  __STDC_WANT_LIB_EXT1__.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52863 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

missing.h: __STDC_WANT_LIB_EXT1__

2015-12-02T01:50:34+00:00

* include/ruby/missing.h: __STDC_WANT_LIB_EXT1__ is necessary for
  memset_s.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52847 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

explicit_bzero.c: needs windows.h

2015-12-01T03:52:20+00:00

* missing/explicit_bzero.c, random.c (explicit_bzero):
  SecureZeroMemory() needs windows.h.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52827 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

missing.h: explicit_bzero by SecureZeroMemory

2015-12-01T01:39:24+00:00

* include/ruby/missing.h (explicit_bzero): use SecureZeroMemory on
  Windows.  assume Windows XP or later at compile time.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52826 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

missing.h: explicit_bzero by memset_s

2015-12-01T01:24:23+00:00

* include/ruby/missing.h (explicit_bzero_by_memset_s): call
  memset_s directly if available.

* missing/explicit_bzero.c: optimization is not a matter if
  memset_s is available.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52824 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* missing/explicit_bzero.c: new file. define explicit_bzero.

2015-11-30T20:26:13+00:00

* common.mk: add a rule for explicit.o.
* configure.in: detect explicit_bzero and memset_s.
* include/ruby/missing.h: add explicit_bzero.
* random.c (init_randomseed): use explicit_bzero() instead of
  memset(). memset could be eliminated by compiler optimization.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52806 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

missing.h: fix condition

2015-10-20T07:15:16+00:00

* include/ruby/missing.h (bytesequence4_or_float): define by
  configured result.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52203 b2dd03c8-39d4-4d8f-98ff-823fe69b080e