diff options
| -rw-r--r-- | nx-X11/programs/Xserver/GL/glx/glxserver.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/GL/glx/glxserver.h b/nx-X11/programs/Xserver/GL/glx/glxserver.h index e8449b2bb..404757405 100644 --- a/nx-X11/programs/Xserver/GL/glx/glxserver.h +++ b/nx-X11/programs/Xserver/GL/glx/glxserver.h @@ -54,6 +54,7 @@ #include "GL/glx_ansic.h" +#include <limits.h> /* ** The X header misc.h defines these math functions. */ @@ -223,6 +224,46 @@ extern void glxSwapQueryServerStringReply(ClientPtr client, /* * Routines for computing the size of variably-sized rendering commands. */ +static __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 __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 __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, |