From 462f18c7b25fe3e467f837647d07ab0a78aa8d2b Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Sun, 22 Feb 2015 21:39:56 +0100
Subject: Merged origin/release (checked in because wanted to merge new stuff)

---
 xorg-server/glx/glxserver.h | 43 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

(limited to 'xorg-server/glx/glxserver.h')

diff --git a/xorg-server/glx/glxserver.h b/xorg-server/glx/glxserver.h
index a324b290f..9088ec478 100644
--- a/xorg-server/glx/glxserver.h
+++ b/xorg-server/glx/glxserver.h
@@ -177,7 +177,7 @@ typedef int (*__GLXprocPtr) (__GLXclientState *, char *pc);
 /*
  * Tables for computing the size of each rendering command.
  */
-typedef int (*gl_proto_size_func) (const GLbyte *, Bool);
+typedef int (*gl_proto_size_func) (const GLbyte *, Bool, int);
 
 typedef struct {
     int bytes;
@@ -228,6 +228,47 @@ extern void glxSwapQueryServerStringReply(ClientPtr client,
  * Routines for computing the size of variably-sized rendering commands.
  */
 
+static _X_INLINE int
+safe_add(int a, int b)
+{
+    if (a < 0 || b < 0)
+        return -1;
+
+    if (INT_MAX - a < b)
+        return -1;
+
+    return a + b;
+}
+
+static _X_INLINE int
+safe_mul(int a, int b)
+{
+    if (a < 0 || b < 0)
+        return -1;
+
+    if (a == 0 || b == 0)
+        return 0;
+
+    if (a > INT_MAX / b)
+        return -1;
+
+    return a * b;
+}
+
+static _X_INLINE int
+safe_pad(int a)
+{
+    int ret;
+
+    if (a < 0)
+        return -1;
+
+    if ((ret = safe_add(a, 3)) < 0)
+        return -1;
+
+    return ret & (GLuint)~3;
+}
+
 extern int __glXTypeSize(GLenum enm);
 extern int __glXImageSize(GLenum format, GLenum type,
                           GLenum target, GLsizei w, GLsizei h, GLsizei d,
-- 
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