xserver git update 10/12/2010

1 files changed, 146 insertions, 24 deletions

diff --git a/xorg-server/os/xprintf.c b/xorg-server/os/xprintf.c
index 5a42df2d1..218c3c91f 100644
--- a/xorg-server/os/xprintf.c
+++ b/xorg-server/os/xprintf.c
@@ -1,6 +1,13 @@
-/* 

- * printf routines which xalloc their buffer

- */ 

+/**

+ * @file

+ *

+ * @section DESCRIPTION

+ *

+ * 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.

+ */

 /*

  * Copyright (c) 2004 Alexander Gottwald

  *

@@ -26,6 +33,29 @@
  * holders shall not be used in advertising or otherwise to promote the sale,

  * use or other dealings in this Software without prior written authorization.

  */

+/*

+ * 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.

+ */

+

 #ifdef HAVE_DIX_CONFIG_H

 #include <dix-config.h>

 #endif

@@ -35,6 +65,13 @@
 #include <stdarg.h>

 #include <stdio.h>

 

+#ifdef asprintf

+# undef asprintf

+#endif

+#ifdef vasprintf

+# undef vasprintf

+#endif

+

 #ifndef va_copy

 # ifdef __va_copy

 #  define va_copy __va_copy

@@ -42,11 +79,23 @@
 #  error "no working va_copy was found"

 # endif

 #endif

-    

-char *

-Xvprintf(const char *format, va_list va)

+

+/**

+ * Varargs sprintf that allocates a string buffer the right size for

+ * the pattern & data provided and prints the requested data to it.

+ *

+ * @param ret     Pointer to which the newly allocated buffer is written

+ *                (contents undefined on error)

+ * @param format  printf style format string

+ * @param va      variable argument list

+ * @return        size of allocated buffer, or -1 on error.

+ */

+int

+Xvasprintf(char **ret, const char * _X_RESTRICT_KYWD format, va_list va)

 {

-    char *ret;

+#ifdef HAVE_VASPRINTF

+    return vasprintf(ret, format, va);

+#else

     int size;

     va_list va2;

 

@@ -54,12 +103,94 @@ Xvprintf(const char *format, va_list va)
     size = vsnprintf(NULL, 0, format, va2);

     va_end(va2);

 

-    ret = (char *)malloc(size + 1);

-    if (ret == NULL)

-        return NULL;

+    *ret = malloc(size + 1);

+    if (*ret == NULL)

+        return -1;

 

-    vsnprintf(ret, size + 1, format, va);

+    vsnprintf(*ret, size + 1, format, va);

     ret[size] = 0;

+    return size;

+#endif

+}

+

+#ifndef HAVE_VASPRINTF

+# define vasprintf Xvasprintf

+#endif

+

+/**

+ * sprintf that allocates a string buffer the right size for

+ * the pattern & data provided and prints the requested data to it.

+ *

+ * @param ret     Pointer to which the newly allocated buffer is written

+ *                (contents undefined on error)

+ * @param format  printf style format string

+ * @param ...     arguments for specified format

+ * @return        size of allocated buffer, or -1 on error.

+ */

+int

+Xasprintf(char ** ret, const char * _X_RESTRICT_KYWD format, ...)

+{

+    int size;

+    va_list va;

+    va_start(va, format);

+    size = vasprintf(ret, format, va);

+    va_end(va);

+    return size;

+}

+

+/**

+ * Varargs sprintf that allocates a string buffer the right size for

+ * the pattern & data provided and prints the requested data to it.

+ * On failure, issues a FatalError message and aborts the server.

+ *

+ * @param ret     Pointer to which the newly allocated buffer is written

+ *                (contents undefined on error)

+ * @param format  printf style format string

+ * @param va      variable argument list

+ * @return        size of allocated buffer

+ */

+int

+XNFvasprintf(char **ret, const char * _X_RESTRICT_KYWD format, va_list va)

+{

+    int size = vasprintf(ret, format, va);

+    if ((size == -1) || (*ret == NULL)) {

+	Error("XNFvasprintf");

+	FatalError("XNFvasprintf failed");

+    }

+    return size;

+}

+

+/**

+ * sprintf that allocates a string buffer the right size for

+ * the pattern & data provided and prints the requested data to it.

+ * On failure, issues a FatalError message and aborts the server.

+ *

+ * @param ret     Pointer to which the newly allocated buffer is written

+ *                (contents undefined on error)

+ * @param format  printf style format string

+ * @param ...     arguments for specified format

+ * @return        size of allocated buffer

+ */

+int

+XNFasprintf(char ** ret, const char * _X_RESTRICT_KYWD format, ...)

+{

+    int size;

+    va_list va;

+    va_start(va, format);

+    size = XNFvasprintf(ret, format, va);

+    va_end(va);

+    return size;

+}

+

+/* Old api, now deprecated, may be removed in the future */

+char *

+Xvprintf(const char *format, va_list va)

+{

+    char *ret;

+

+    if (vasprintf(&ret, format, va) == -1)

+	ret = NULL;

+

     return ret;

 }

 

@@ -68,7 +199,8 @@ char *Xprintf(const char *format, ...)
     char *ret;

     va_list va;

     va_start(va, format);

-    ret = Xvprintf(format, va);

+    if (vasprintf(&ret, format, va) == -1)

+	ret = NULL;

     va_end(va);

     return ret;

 }

@@ -77,19 +209,9 @@ char *
 XNFvprintf(const char *format, va_list va)

 {

     char *ret;

-    int size;

-    va_list va2;

-

-    va_copy(va2, va);

-    size = vsnprintf(NULL, 0, format, va2);

-    va_end(va2);

 

-    ret = (char *)xnfalloc(size + 1);

-    if (ret == NULL)

-        return NULL;

+    XNFvasprintf(&ret, format, va);

 

-    vsnprintf(ret, size + 1, format, va);

-    ret[size] = 0;

     return ret;

 }

 

@@ -98,7 +220,7 @@ char *XNFprintf(const char *format, ...)
     char *ret;

     va_list va;

     va_start(va, format);

-    ret = XNFvprintf(format, va);

+    XNFvasprintf(&ret, format, va);

     va_end(va);

     return ret;

 }