[PATCH 2/3] refactor: use bitsizeof() instead of 8 * sizeof()

[Pierre Habouzit <madcoder@debian.org>]

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
---
 git-compat-util.h |    3 ++-
 sha1_file.c       |    2 +-
 xdiff/xdiffi.c    |    2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/git-compat-util.h b/git-compat-util.h
index 913f41a..6dfc0dd 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -26,6 +26,7 @@
 #endif
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+#define bitsizeof(x)  (CHAR_BIT * sizeof(x))
 
 #ifdef __GNUC__
 #define TYPEOF(x) (__typeof__(x))
@@ -33,7 +34,7 @@
 #define TYPEOF(x)
 #endif
 
-#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
+#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
 #define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */
 
 /* Approximation of the length of the decimal representation of this type. */
diff --git a/sha1_file.c b/sha1_file.c
index b91a7dd..4ea0b18 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1170,7 +1170,7 @@ unsigned long unpack_object_header_buffer(const unsigned char *buf,
 	size = c & 15;
 	shift = 4;
 	while (c & 0x80) {
-		if (len <= used || sizeof(long) * 8 <= shift) {
+		if (len <= used || bitsizeof(long) <= shift) {
 			error("bad object header");
 			return 0;
 		}
diff --git a/xdiff/xdiffi.c b/xdiff/xdiffi.c
index 1ebab68..da67c04 100644
--- a/xdiff/xdiffi.c
+++ b/xdiff/xdiffi.c
@@ -26,7 +26,7 @@
 
 #define XDL_MAX_COST_MIN 256
 #define XDL_HEUR_MIN_COST 256
-#define XDL_LINE_MAX (long)((1UL << (8 * sizeof(long) - 1)) - 1)
+#define XDL_LINE_MAX (long)((1UL << (CHAR_BIT * sizeof(long) - 1)) - 1)
 #define XDL_SNAKE_CNT 20
 #define XDL_K_HEUR 4
 
-- 
1.6.4.rc1.192.g631f9