[Mesa-dev] [PATCH] util/u_format: Assert that format block size is at least 1 byte.

[Vinson Lee]

The block size for all formats is currently at least 1 byte. Add an
assertion for this.

This should silence several Coverity "Division or modulo by zero"
defects.

Signed-off-by: Vinson Lee <vlee at freedesktop.org>
---
 src/gallium/auxiliary/util/u_format.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h
index 28527f5..84f16d5 100644
--- a/src/gallium/auxiliary/util/u_format.h
+++ b/src/gallium/auxiliary/util/u_format.h
@@ -716,10 +716,15 @@ static INLINE uint
 util_format_get_blocksize(enum pipe_format format)
 {
    uint bits = util_format_get_blocksizebits(format);
+   uint bytes = bits / 8;
 
    assert(bits % 8 == 0);
+   assert(bytes > 0);
+   if (bytes == 0) {
+      bytes = 1;
+   }
 
-   return bits / 8;
+   return bytes;
 }
 
 static INLINE uint
-- 
1.8.3.2