X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fsha1.h;h=8573c5435bed079b83db967eabec52224e9afe35;hp=a5d695d65a633d5e01428d56659b3067ea1e0f89;hb=2beb22c748f33253876ca690cac7f7284c747106;hpb=ca28b6f865975bd84933a97fd902b81c6b284851

diff --git a/src/sha1.h b/src/sha1.h
index a5d695d6..8573c543 100644
--- a/src/sha1.h
+++ b/src/sha1.h
@@ -9,6 +9,8 @@
 
 #define SHA1_HASH_SIZE 20
 
+extern const u8 zero_hash[SHA1_HASH_SIZE];
+
 static inline void copy_hash(u8 dest[SHA1_HASH_SIZE],
 			     const u8 src[SHA1_HASH_SIZE])
 {
@@ -39,13 +41,14 @@ static inline void print_hash(const u8 hash[SHA1_HASH_SIZE])
 
 static inline bool is_zero_hash(const u8 hash[SHA1_HASH_SIZE])
 {
-	for (u8 i = 0; i < SHA1_HASH_SIZE / 4; i++)
-		if (((u32*)hash)[i])
-			return false;
+	if (hash)
+		for (u8 i = 0; i < SHA1_HASH_SIZE / 4; i++)
+			if (((u32*)hash)[i])
+				return false;
 	return true;
 }
 
-static void zero_hash(u8 hash[SHA1_HASH_SIZE])
+static inline void zero_out_hash(u8 hash[SHA1_HASH_SIZE])
 {
 	memset(hash, 0, SHA1_HASH_SIZE);
 }