Merge branch 'hn/reftable'

The "reftable" backend for the refs API, without integrating into
the refs subsystem, has been added.

* hn/reftable:
  Add "test-tool dump-reftable" command.
  reftable: add dump utility
  reftable: implement stack, a mutable database of reftable files.
  reftable: implement refname validation
  reftable: add merged table view
  reftable: add a heap-based priority queue for reftable records
  reftable: reftable file level tests
  reftable: read reftable files
  reftable: generic interface to tables
  reftable: write reftable files
  reftable: a generic binary tree implementation
  reftable: reading/writing blocks
  Provide zlib's uncompress2 from compat/zlib-compat.c
  reftable: (de)serialization for the polymorphic record type.
  reftable: add blocksource, an abstraction for random access reads
  reftable: utility functions
  reftable: add error related functionality
  reftable: add LICENSE
  hash.h: provide constants for the hash IDs

1 files changed, 6 insertions, 0 deletions

diff --git a/hash.h b/hash.h
index 9e25c40e9a..5d40368f18 100644
--- a/hash.h
+++ b/hash.h
@@ -95,12 +95,18 @@ static inline void git_SHA256_Clone(git_SHA256_CTX *dst, const git_SHA256_CTX *s
 /* Number of algorithms supported (including unknown). */
 #define GIT_HASH_NALGOS (GIT_HASH_SHA256 + 1)
 
+/* "sha1", big-endian */
+#define GIT_SHA1_FORMAT_ID 0x73686131
+
 /* The length in bytes and in hex digits of an object name (SHA-1 value). */
 #define GIT_SHA1_RAWSZ 20
 #define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
 /* The block size of SHA-1. */
 #define GIT_SHA1_BLKSZ 64
 
+/* "s256", big-endian */
+#define GIT_SHA256_FORMAT_ID 0x73323536
+
 /* 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)