sync code with last improvements from OpenBSD

proto/xorgproto/include/X11/Xos.h

@@ -0,0 +1,148 @@
+/*
+ *
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+ *
+ * The X Window System is a Trademark of The Open Group.
+ *
+ */
+
+/* This is a collection of things to try and minimize system dependencies
+ * in a "significant" number of source files.
+ */
+
+#ifndef _XOS_H_
+# define _XOS_H_
+
+# include <X11/Xosdefs.h>
+
+/*
+ * Get major data types (esp. caddr_t)
+ */
+
+# include <sys/types.h>
+
+# if defined(__SCO__) || defined(__UNIXWARE__)
+#  include <stdint.h>
+# endif
+
+
+/*
+ * Just about everyone needs the strings routines.  We provide both forms here,
+ * index/rindex and strchr/strrchr, so any systems that don't provide them all
+ * need to have #defines here.
+ *
+ * These macros are defined this way, rather than, e.g.:
+ *    #defined index(s,c) strchr(s,c)
+ * because someone might be using them as function pointers, and such
+ * a change would break compatibility for anyone who's relying on them
+ * being the way they currently are. So we're stuck with them this way,
+ * which can be really inconvenient. :-(
+ */
+
+# include <string.h>
+# if defined(__SCO__) || defined(__UNIXWARE__) || defined(__sun) || defined(__CYGWIN__) || defined(_AIX) || defined(__APPLE__)
+#  include <strings.h>
+# else
+#  ifndef index
+#   define index(s,c) (strchr((s),(c)))
+#  endif
+#  ifndef rindex
+#   define rindex(s,c) (strrchr((s),(c)))
+#  endif
+# endif
+
+/*
+ * Get open(2) constants
+ */
+# if defined(X_NOT_POSIX)
+#  include <fcntl.h>
+#  if defined(USL) || defined(__i386__) && (defined(SYSV) || defined(SVR4))
+#   include <unistd.h>
+#  endif
+#  ifdef WIN32
+#   include <X11/Xw32defs.h>
+#  else
+#   include <sys/file.h>
+#  endif
+# else /* X_NOT_POSIX */
+#  include <fcntl.h>
+#  include <unistd.h>
+# endif /* X_NOT_POSIX else */
+
+/*
+ * Get struct timeval and struct tm
+ */
+
+# if defined(_POSIX_SOURCE) && defined(SVR4)
+/* need to omit _POSIX_SOURCE in order to get what we want in SVR4 */
+#  undef _POSIX_SOURCE
+#  include <sys/time.h>
+#  define _POSIX_SOURCE
+# elif defined(WIN32)
+#  include <time.h>
+#  if !defined(_WINSOCKAPI_) && !defined(_WILLWINSOCK_) && !defined(_TIMEVAL_DEFINED) && !defined(_STRUCT_TIMEVAL)
+struct timeval {
+    long    tv_sec;         /* seconds */
+    long    tv_usec;        /* and microseconds */
+};
+#   define _TIMEVAL_DEFINED
+#  endif
+#  include <sys/timeb.h>
+#  define gettimeofday(t) \
+{ \
+    struct _timeb _gtodtmp; \
+    _ftime (&_gtodtmp); \
+    (t)->tv_sec = _gtodtmp.time; \
+    (t)->tv_usec = _gtodtmp.millitm * 1000; \
+}
+# else
+#  include <sys/time.h>
+#  include <time.h>
+# endif /* defined(_POSIX_SOURCE) && defined(SVR4) */
+
+/* define X_GETTIMEOFDAY macro, a portable gettimeofday() */
+# if defined(_XOPEN_XPG4) || defined(_XOPEN_UNIX) /* _XOPEN_UNIX is XPG4.2 */
+#  define X_GETTIMEOFDAY(t) gettimeofday(t, (struct timezone*)0)
+# else
+#  if defined(SVR4) || defined(__SVR4) || defined(WIN32)
+#   define X_GETTIMEOFDAY(t) gettimeofday(t)
+#  else
+#   define X_GETTIMEOFDAY(t) gettimeofday(t, (struct timezone*)0)
+#  endif
+# endif /* XPG4 else */
+
+
+# ifdef __GNU__
+#  define PATH_MAX 4096
+#  define MAXPATHLEN 4096
+#  define OPEN_MAX 256 /* We define a reasonable limit.  */
+# endif
+
+/* use POSIX name for signal */
+# if defined(X_NOT_POSIX) && defined(SYSV) && !defined(SIGCHLD)
+#  define SIGCHLD SIGCLD
+# endif
+
+# include <X11/Xarch.h>
+
+#endif /* _XOS_H_ */