The easiest way to check for the version of an extension is to send the maximum
possible version numbers in the QueryVersion request. The X server overflows on
these as it assumes you will send a reasonable version number.
---
include/misc.h | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/include/misc.h b/include/misc.h
index 17de710..9c2f573 100644
--- a/include/misc.h
+++ b/include/misc.h
@@ -259,15 +259,19 @@ extern void FormatDouble(double dbl, char *string);
* or a value greater than 0
*/
static inline int
-version_compare(uint16_t a_major, uint16_t a_minor,
- uint16_t b_major, uint16_t b_minor)
+version_compare(uint32_t a_major, uint32_t a_minor,
+ uint32_t b_major, uint32_t b_minor)
{
- int a, b;
+ if (a_major > b_major)
+ return 1;
+ if (a_major < b_major)
+ return -1;
+ if (a_minor > b_minor)
+ return 1;
+ if (a_minor < b_minor)
+ return -1;
- a = a_major << 16 | a_minor;
- b = b_major << 16 | b_minor;
-
- return (a - b);
+ return 0;
}
/* some macros to help swap requests, replies, and events */
--
2.0.0.rc0
_______________________________________________
[email protected]: X.Org development
Archives: http://lists.x.org/archives/xorg-devel
Info: http://lists.x.org/mailman/listinfo/xorg-devel
