diff options
Diffstat (limited to 'glx/glxserver.h')
| -rw-r--r-- | glx/glxserver.h | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/glx/glxserver.h b/glx/glxserver.h index a324b290f..9088ec478 100644 --- a/glx/glxserver.h +++ b/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, |