diff options
| -rw-r--r-- | reftable/basics.h | 8 | ||||
| -rw-r--r-- | reftable/reader.c | 10 | ||||
| -rw-r--r-- | reftable/writer.c | 16 |
3 files changed, 29 insertions, 5 deletions
diff --git a/reftable/basics.h b/reftable/basics.h index 7aa46d7c30..bcab0b529b 100644 --- a/reftable/basics.h +++ b/reftable/basics.h @@ -150,4 +150,12 @@ int common_prefix_size(struct reftable_buf *a, struct reftable_buf *b); int hash_size(uint32_t id); +/* + * Format IDs that identify the hash function used by a reftable. Note that + * these constants end up on disk and thus mustn't change. The format IDs are + * "sha1" and "s256" in big endian, respectively. + */ +#define REFTABLE_FORMAT_ID_SHA1 ((uint32_t) 0x73686131) +#define REFTABLE_FORMAT_ID_SHA256 ((uint32_t) 0x73323536) + #endif diff --git a/reftable/reader.c b/reftable/reader.c index 90dc950b57..64eb6938ef 100644 --- a/reftable/reader.c +++ b/reftable/reader.c @@ -109,16 +109,18 @@ static int parse_footer(struct reftable_reader *r, uint8_t *footer, if (r->version == 1) { r->hash_id = GIT_SHA1_FORMAT_ID; } else { - r->hash_id = get_be32(f); - switch (r->hash_id) { - case GIT_SHA1_FORMAT_ID: + switch (get_be32(f)) { + case REFTABLE_FORMAT_ID_SHA1: + r->hash_id = GIT_SHA1_FORMAT_ID; break; - case GIT_SHA256_FORMAT_ID: + case REFTABLE_FORMAT_ID_SHA256: + r->hash_id = GIT_SHA256_FORMAT_ID; break; default: err = REFTABLE_FORMAT_ERROR; goto done; } + f += 4; } diff --git a/reftable/writer.c b/reftable/writer.c index fd136794d5..9aa45de634 100644 --- a/reftable/writer.c +++ b/reftable/writer.c @@ -103,8 +103,22 @@ static int writer_write_header(struct reftable_writer *w, uint8_t *dest) put_be64(dest + 8, w->min_update_index); put_be64(dest + 16, w->max_update_index); if (writer_version(w) == 2) { - put_be32(dest + 24, w->opts.hash_id); + uint32_t hash_id; + + switch (w->opts.hash_id) { + case GIT_SHA1_FORMAT_ID: + hash_id = REFTABLE_FORMAT_ID_SHA1; + break; + case GIT_SHA256_FORMAT_ID: + hash_id = REFTABLE_FORMAT_ID_SHA256; + break; + default: + return -1; + } + + put_be32(dest + 24, hash_id); } + return header_size(writer_version(w)); } |