Add a base implementation of SHA-256 support

diff --git a/cache.h b/cache.h
index 5d969727f96d33c5b723c9179cb11c16605ab25d..a082164df8627d56fcea074b4da7da8fc8c2068e 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -48,11 +48,17 @@ unsigned long git_deflate_bound(git_zstream *, unsigned long);
 /* The block size of SHA-1. */
 #define GIT_SHA1_BLKSZ 64
 
+/* The length in bytes and in hex digits of an object name (SHA-256 value). */
+#define GIT_SHA256_RAWSZ 32
+#define GIT_SHA256_HEXSZ (2 * GIT_SHA256_RAWSZ)
+/* The block size of SHA-256. */
+#define GIT_SHA256_BLKSZ 64
+
 /* The length in byte and in hex digits of the largest possible hash value. */
-#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ
-#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ
+#define GIT_MAX_RAWSZ GIT_SHA256_RAWSZ
+#define GIT_MAX_HEXSZ GIT_SHA256_HEXSZ
 /* The largest possible block size for any supported hash. */
-#define GIT_MAX_BLKSZ GIT_SHA1_BLKSZ
+#define GIT_MAX_BLKSZ GIT_SHA256_BLKSZ
 
 struct object_id {
        unsigned char hash[GIT_MAX_RAWSZ];