lib: avoid clang static analyzer warning in deflate_get_offset_slot()

ebiggers · ebiggers · commit 9e79696644b8 · 2024-03-17T20:40:22.000-07:00
Resolves #357
diff --git a/lib/deflate_compress.c b/lib/deflate_compress.c
@@ -1474,6 +1474,8 @@ deflate_get_offset_slot(u32 offset)
 	 */
 	unsigned n = (256 - offset) >> 29;
 
+	ASSERT(offset >= 1 && offset <= 32768);
+
 	return deflate_offset_slot[(offset - 1) >> n] + (n << 1);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -1474,6 +1474,8 @@ deflate_get_offset_slot(u32 offset)`
`1474`	`1474`	`*/`
`1475`	`1475`	`unsigned n = (256 - offset) >> 29;`
`1476`	`1476`
	`1477`	`+ ASSERT(offset >= 1 && offset <= 32768);`
	`1478`	`+`
`1477`	`1479`	`return deflate_offset_slot[(offset - 1) >> n] + (n << 1);`
`1478`	`1480`	`}`
`1479`	`1481`