X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Futil.h;h=083ddb2e14e4b6ed8d7344bf7bc77a069a4a6dc9;hb=31cea10bc58ea3067c711c47a266cc68f34459d9;hp=d87a0e827d16e5c2d80629c84b8af4e5ef3b3769;hpb=b61e9afca45dacd9baefbcfa17dbea2af75259b8;p=wimlib

diff --git a/src/util.h b/src/util.h
index d87a0e82..083ddb2e 100644
--- a/src/util.h
+++ b/src/util.h
@@ -76,6 +76,12 @@ typedef unsigned uint;
 	(type *)( (char *)__mptr - offsetof(type,member) );})
 #endif
 
+#define DIV_ROUND_UP(numerator, denominator) \
+	(((numerator) + (denominator) - 1) / (denominator))
+
+#define MODULO_NONZERO(numerator, denominator) \
+	(((numerator) % (denominator)) ? ((numerator) % (denominator)) : (denominator))
+
 #define ARRAY_LEN(array) (sizeof(array) / sizeof((array)[0]))
 
 #define ZERO_ARRAY(array) memset(array, 0, sizeof(array))
@@ -175,13 +181,25 @@ extern void print_string(const void *string, size_t len);
 
 extern int get_num_path_components(const char *path);
 
-extern ssize_t full_write(int fd, const void *buf, size_t n);
-
 static inline void print_byte_field(const u8 field[], size_t len)
 {
 	while (len--)
 		printf("%02hhx", *field++);
 }
 
+static inline u32 bsr32(u32 n)
+{
+#if defined(__x86__) || defined(__x86_64__)
+	asm("bsrl %0, %0;"
+			: "=r"(n)
+			: "0" (n));
+	return n;
+#else
+	u32 pow = 0;
+	while ((n >>= 1) != 0)
+		pow++;
+	return pow;
+#endif
+}
 
 #endif /* _WIMLIB_UTIL_H */