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-rw-r--r--git-compat-util.h3
1 files changed, 2 insertions, 1 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. */