Add asprintf() implementation for platforms without it

Backported from X.org:

commit c95c1d338fdb62dbe3dba934b97324fa778b7fce
Author: Alan Coopersmith <alan.coopersmith@oracle.com>
Date:   Sat Nov 27 18:43:12 2010 -0800

    Add asprintf() implementation for platforms without it

    Provides a portable implementation of this common allocating sprintf()
    API found in many, but not yet all, of the platforms we support.
    If the platform provides vasprintf() we simply wrap it, otherwise we
    implement it - either way callers can use it regardless of platform.

    Since not all platforms guarantee to NULL out the return pointer on
    failure, we don't either, and require callers to check the return
    value for -1.

    The old Xprintf() API is deprecated, but left for compatibility for now.

    The new API is added in a new header so that it can be used in parts of
    the server such as hw/xfree86/parser that don't include all the server
    headers.

    Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
    Reviewed-by: Mikhail Gusarov <dottedmag@dottedmag.net>

Includes re-indentation changes from
9838b7032ea9792bec21af424c53c07078636d21.

Backported-to-NX-by: Mihai Moldovan <ionic@ionic.de>

3 files changed, 79 insertions, 4 deletions

diff --git a/nx-X11/programs/Xserver/include/Imakefile b/nx-X11/programs/Xserver/include/Imakefile
index 53f193ec8..4c168edf1 100644
--- a/nx-X11/programs/Xserver/include/Imakefile
+++ b/nx-X11/programs/Xserver/include/Imakefile
@@ -14,6 +14,7 @@ all::
 depend::
 
 InstallDriverSDKNonExecFile(XIstubs.h,$(DRIVERSDKINCLUDEDIR))
+InstallDriverSDKNonExecFile(Xprintf.h,$(DRIVERSDKINCLUDEDIR))
 InstallDriverSDKNonExecFile(bstore.h,$(DRIVERSDKINCLUDEDIR))
 InstallDriverSDKNonExecFile(bstorestr.h,$(DRIVERSDKINCLUDEDIR))
 InstallDriverSDKNonExecFile(client.h,$(DRIVERSDKINCLUDEDIR))
diff --git a/nx-X11/programs/Xserver/include/Xprintf.h b/nx-X11/programs/Xserver/include/Xprintf.h
new file mode 100644
index 000000000..7f7366d33
--- /dev/null
+++ b/nx-X11/programs/Xserver/include/Xprintf.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#ifndef XPRINTF_H
+#define XPRINTF_H
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <nx-X11/Xfuncproto.h>
+
+#ifndef _X_RESTRICT_KYWD
+#if defined(restrict) /* assume autoconf set it correctly */ || \
+   (defined(__STDC__) && (__STDC_VERSION__ - 0 >= 199901L))     /* C99 */
+#define _X_RESTRICT_KYWD  restrict
+#elif defined(__GNUC__) && !defined(__STRICT_ANSI__)    /* gcc w/C89+extensions */
+#define _X_RESTRICT_KYWD __restrict__
+#else
+#define _X_RESTRICT_KYWD
+#endif
+#endif
+
+/*
+ * These functions provide a portable implementation of the common (but not
+ * yet universal) asprintf & vasprintf routines to allocate a buffer big
+ * enough to sprintf the arguments to.  The XNF variants terminate the server
+ * if the allocation fails.
+ * The buffer allocated is returned in the pointer provided in the first
+ * argument.   The return value is the size of the allocated buffer, or -1
+ * on failure.
+ */
+extern _X_EXPORT int
+Xasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, ...)
+_X_ATTRIBUTE_PRINTF(2, 3);
+extern _X_EXPORT int
+Xvasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, va_list va)
+_X_ATTRIBUTE_PRINTF(2, 0);
+extern _X_EXPORT int
+XNFasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, ...)
+_X_ATTRIBUTE_PRINTF(2, 3);
+extern _X_EXPORT int
+XNFvasprintf(char **ret, const char *_X_RESTRICT_KYWD fmt, va_list va)
+_X_ATTRIBUTE_PRINTF(2, 0);
+
+#if !defined(HAVE_ASPRINTF) && !defined(HAVE_VASPRINTF)
+#define asprintf  Xasprintf
+#define vasprintf Xvasprintf
+#endif
+
+#endif                          /* XPRINTF_H */
diff --git a/nx-X11/programs/Xserver/include/os.h b/nx-X11/programs/Xserver/include/os.h
index 0c7ce6a6f..be41e0118 100644
--- a/nx-X11/programs/Xserver/include/os.h
+++ b/nx-X11/programs/Xserver/include/os.h
@@ -230,10 +230,15 @@ extern void OsInitAllocator(void);
 
 extern char *Xstrdup(const char *s);
 extern char *XNFstrdup(const char *s);
-extern char *Xprintf(const char *fmt, ...);
-extern char *Xvprintf(const char *fmt, va_list va);
-extern char *XNFprintf(const char *fmt, ...);
-extern char *XNFvprintf(const char *fmt, va_list va);
+
+/* Include new X*asprintf API */
+#include "Xprintf.h"
+
+/* Older api deprecated in favor of the asprintf versions */
+extern _X_EXPORT char *Xprintf(const char *fmt, ...) _X_ATTRIBUTE_PRINTF(1,2) _X_DEPRECATED;
+extern _X_EXPORT char *Xvprintf(const char *fmt, va_list va)_X_ATTRIBUTE_PRINTF(1,0) _X_DEPRECATED;
+extern _X_EXPORT char *XNFprintf(const char *fmt, ...) _X_ATTRIBUTE_PRINTF(1,2) _X_DEPRECATED;
+extern _X_EXPORT char *XNFvprintf(const char *fmt, va_list va)_X_ATTRIBUTE_PRINTF(1,0) _X_DEPRECATED;
 
 typedef SIGVAL (*OsSigHandlerPtr)(int /* sig */);