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* Make the presence of stdin and stdout optional.Ed Schouten2015-03-261-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The idea behind Nuxi CloudABI is that it is targeted at (but not limited to) running networked services in a sandboxed environment. The model behind stdin, stdout and stderr is strongly focused on interactive tools in a command shell. CloudABI does not support the notion of stdin and stdout, as 'standard input/output' does not apply to services. The concept of stderr does makes sense though, as services do need some mechanism to log error messages in a uniform way. This patch extends libc++ in such a way that std::cin and std::cout and the associated <cstdio>/<cwchar> functions can be disabled through the flags _LIBCPP_HAS_NO_STDIN and _LIBCPP_HAS_NO_STDOUT, respectively. At the same time it attempts to clean up src/iostream.cpp a bit. Instead of using a single array of mbstate_t objects and hardcoding the array indices, it creates separate objects that declared next to the iostream objects and their buffers. The code is also restructured by interleaving the construction and setup of c* and wc* objects. That way it is more obvious that this is done identically. The c* and wc* objects already have separate unit tests. Make use of this fact by adding XFAILs in case libcpp-has-no-std* is set. That way the tests work in both directions. If stdin or stdout is disabled, these tests will therefore test for the absence of c* and wc*. Differential Revision: http://reviews.llvm.org/D8340 llvm-svn: 233275
* Remove the state_types array.Ed Schouten2015-03-261-8/+12
| | | | | | | | | | | | | | | If we want to add support for making std::cin and std::cout optional, it is impractical to have all of the mbstate_t objects in one array. This would mean that if std::cin and std::cout are omitted, the state_types array is only used partially. Solve this by using separate global variables. These are placed right next to the iostream object and the buffer, meaning we can easily #ifdef them away. Differential Revision: http://reviews.llvm.org/D8359 llvm-svn: 233274
* Clean up iostream creation in preparation for conditionalizing streams.Ed Schouten2015-03-171-18/+20
| | | | | | | | | | | | Interleave the code for narrow and wide character streams. This makes it more obvious that the two pieces of code are identical. Furthermore, it makes it easier to conditionally compile support for certain streams, as less #ifdef blocks are needed. Differential Revision: http://reviews.llvm.org/D8342 Reviewed by: marshall llvm-svn: 232516
* Nico Rieck: this patch series fixes visibility issues on Windows as ↵Howard Hinnant2013-08-121-8/+8
| | | | | | explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>. llvm-svn: 188192
* Use reinterpret_casts directly in place of C-style casts.Joerg Sonnenberger2013-04-271-4/+4
| | | | llvm-svn: 180679
* This is an optimization which produces improved launching time. There ↵Howard Hinnant2013-03-191-6/+8
| | | | | | should be no functionality change. Clients should see no ABI differences. llvm-svn: 177443
* Protect use of alignas against older versions of clangHoward Hinnant2012-05-311-14/+14
| | | | llvm-svn: 157764
* Alter the terminal streams such that they do not get added to the atexit ↵Howard Hinnant2012-03-161-25/+38
| | | | | | chain, and thus never get destructed. llvm-svn: 152926
* _STD -> _VSTD to avoid macro clash on windowsHoward Hinnant2011-06-301-2/+2
| | | | llvm-svn: 134190
* license changeHoward Hinnant2010-11-161-2/+2
| | | | llvm-svn: 119395
* Wiped out some non-ascii characters that snuck into the copyright.Howard Hinnant2010-05-111-1/+1
| | | | llvm-svn: 103516
* libcxx initial importHoward Hinnant2010-05-111-0/+53
llvm-svn: 103490
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