kc3-lang/gnulib/lib/read.c

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• Hash : 03c3f38b
  Author :
  Date : 2017-05-10T21:52:21
  

  Implement a way to opt out from MSVC support.
  
  This is useful for Emacs.
  
  * modules/msvc-nothrow (configure.ac): Invoke gl_MODULE_INDICATOR.
  * lib/accept4.c: Include <io.h> as an alternative to msvc-nothrow.h.
  * lib/error.c: Likewise.
  * lib/fcntl.c: Likewise.
  * lib/flock.c: Likewise.
  * lib/fstat.c: Likewise.
  * lib/fsync.c: Likewise.
  * lib/ioctl.c: Likewise.
  * lib/isapipe.c: Likewise.
  * lib/lseek.c: Likewise.
  * lib/nonblocking.c: Likewise.
  * lib/poll.c: Likewise.
  * lib/select.c: Likewise.
  * lib/sockets.h: Likewise.
  * lib/sockets.c: Likewise.
  * lib/stdio-read.c: Likewise.
  * lib/stdio-write.c: Likewise.
  * lib/utimens.c: Likewise.
  * lib/w32sock.h: Likewise.
  * lib/w32spawn.h: Likewise.
  * tests/test-cloexec.c: Likewise.
  * tests/test-dup-safer.c: Likewise.
  * tests/test-dup2.c: Likewise.
  * tests/test-dup3.c: Likewise.
  * tests/test-fcntl.c: Likewise.
  * tests/test-pipe.c: Likewise.
  * tests/test-pipe2.c: Likewise.
  * lib/ftruncate.c: Likewise.
  (chsize_nothrow): Renamed from chsize.
  * lib/msvc-nothrow.c: Don't include msvc-inval.h if
  HAVE_MSVC_INVALID_PARAMETER_HANDLER is not defined.
  * lib/close.c: Likewise.
  * lib/dup.c: Likewise.
  * lib/fclose.c: Likewise.
  * lib/raise.c: Likewise.
  * tests/test-fgetc.c: Likewise.
  * tests/test-fputc.c: Likewise.
  * tests/test-fread.c: Likewise.
  * tests/test-fwrite.c: Likewise.
  * lib/getdtablesize.c: Likewise.
  (_setmaxstdio_nothrow): Renamed from _setmaxstdio.
  * lib/isatty.c: Don't include msvc-inval.h if
  HAVE_MSVC_INVALID_PARAMETER_HANDLER is not defined.
  Include <io.h> as an alternative to msvc-nothrow.h.
  * lib/read.c: Likewise.
  * lib/write.c: Likewise.
  * lib/dup2.c: Likewise.
  (dup2_nothrow): New function.
  (ms_windows_dup2): Use it.
  * m4/close.m4 (gl_FUNC_CLOSE): Invoke gl_MSVC_INVAL and test
  HAVE_MSVC_INVALID_PARAMETER_HANDLER only if gl_MSVC_INVAL is defined.
  * m4/dup.m4 (gl_FUNC_DUP): Likewise.
  * m4/fdopen.m4 (gl_FUNC_FDOPEN): Likewise.
  * m4/raise.m4 (gl_FUNC_RAISE): Likewise.
  * m4/read.m4 (gl_FUNC_READ): Likewise.
  * m4/write.m4 (gl_FUNC_WRITE): Likewise.
  * doc/windows-without-msvc.texi: New file.
  * doc/gnulib.texi (Native Windows Support without MSVC Support): New
  section.
  

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• lib/read.c

• /* POSIX compatible read() function.
     Copyright (C) 2008-2017 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2011.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <unistd.h>
  
  #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
  
  # include <errno.h>
  # include <io.h>
  
  # define WIN32_LEAN_AND_MEAN  /* avoid including junk */
  # include <windows.h>
  
  # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  #  include "msvc-inval.h"
  # endif
  # if GNULIB_MSVC_NOTHROW
  #  include "msvc-nothrow.h"
  # else
  #  include <io.h>
  # endif
  
  # undef read
  
  # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  static ssize_t
  read_nothrow (int fd, void *buf, size_t count)
  {
    ssize_t result;
  
    TRY_MSVC_INVAL
      {
        result = read (fd, buf, count);
      }
    CATCH_MSVC_INVAL
      {
        result = -1;
        errno = EBADF;
      }
    DONE_MSVC_INVAL;
  
    return result;
  }
  # else
  #  define read_nothrow read
  # endif
  
  ssize_t
  rpl_read (int fd, void *buf, size_t count)
  {
    ssize_t ret = read_nothrow (fd, buf, count);
  
  # if GNULIB_NONBLOCKING
    if (ret < 0
        && GetLastError () == ERROR_NO_DATA)
      {
        HANDLE h = (HANDLE) _get_osfhandle (fd);
        if (GetFileType (h) == FILE_TYPE_PIPE)
          {
            /* h is a pipe or socket.  */
            DWORD state;
            if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0)
                && (state & PIPE_NOWAIT) != 0)
              /* h is a pipe in non-blocking mode.
                 Change errno from EINVAL to EAGAIN.  */
              errno = EAGAIN;
          }
      }
  # endif
  
    return ret;
  }
  
  #endif
  

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