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Added a read_unique_short_oid method to backends, to make it possible to find objects from sha1 prefixes in the future. Default implementations throw GIT_ENOTIMPLEMENTED for strict prefixes (i.e. length < GIT_OID_HEXSZ).

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This commit is contained in:
Marc Pegon 2011-05-27 18:49:09 +02:00 committed by Vicent Marti
parent 4a51e99814
commit ecd6fdf1f7
5 changed files with 75 additions and 0 deletions
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13
include/git2/odb_backend.h
View File

@ -49,6 +49,19 @@ struct git_odb_backend {
struct git_odb_backend *,
const git_oid *);
/* To find a unique object given a prefix
* of its oid.
* The oid given must be so that the
* remaining (GIT_OID_HEXSZ - len)*4 bits
* are 0s.
*/
int (* read_unique_short_oid)(
git_oid *,
void **, size_t *, git_otype *,
struct git_odb_backend *,
const git_oid *,
unsigned int len);
int (* read_header)(
size_t *, git_otype *,
struct git_odb_backend *,

16
src/backends/hiredis.c
View File

@ -107,6 +107,21 @@ int hiredis_backend__read(void **data_p, size_t *len_p, git_otype *type_p, git_o
return error == GIT_SUCCESS ? GIT_SUCCESS : git__rethrow(error, "Failed to read backend");
}
int hiredis_backend__read_unique_short_oid(git_oid *out_oid, void **data_p, size_t *len_p, git_otype *type_p, git_odb_backend *_backend,
const git_oid *short_oid, unsigned int len) {
if (len >= GIT_OID_HEXSZ) {
/* Just match the full identifier */
int error = hiredis_backend__read(data_p, len_p, type_p, backend, short_oid);
if (error == GIT_SUCCESS)
git_oid_cpy(out_oid, short_oid);
return error;
} else if (len < GIT_OID_HEXSZ) {
/* TODO */
return git__throw(GIT_ENOTIMPLEMENTED, "Hiredis backend cannot search objects from short oid");
}
}
int hiredis_backend__exists(git_odb_backend *_backend, const git_oid *oid) {
hiredis_backend *backend;
int found;
@ -174,6 +189,7 @@ int git_odb_backend_hiredis(git_odb_backend **backend_out, const char *host, int
goto cleanup;
backend->parent.read = &hiredis_backend__read;
backend->parent.read_unique_short_oid = &hiredis_backend__read_unique_short_oid;
backend->parent.read_header = &hiredis_backend__read_header;
backend->parent.write = &hiredis_backend__write;
backend->parent.exists = &hiredis_backend__exists;

16
src/backends/sqlite.c
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@ -103,6 +103,21 @@ int sqlite_backend__read(void **data_p, size_t *len_p, git_otype *type_p, git_od
return error == GIT_SUCCESS ? GIT_SUCCESS : git__rethrow(error, "SQLite backend: Failed to read");
}
int sqlite_backend__read_unique_short_oid(git_oid *out_oid, void **data_p, size_t *len_p, git_otype *type_p, git_odb_backend *_backend,
const git_oid *short_oid, unsigned int len) {
if (len >= GIT_OID_HEXSZ) {
/* Just match the full identifier */
int error = sqlite_backend__read(data_p, len_p, type_p, _backend, short_oid);
if (error == GIT_SUCCESS)
git_oid_cpy(out_oid, short_oid);
return error;
} else if (len < GIT_OID_HEXSZ) {
/* TODO */
return git__throw(GIT_ENOTIMPLEMENTED, "Sqlite backend cannot search objects from short oid");
}
}
int sqlite_backend__exists(git_odb_backend *_backend, const git_oid *oid)
{
sqlite_backend *backend;
@ -255,6 +270,7 @@ int git_odb_backend_sqlite(git_odb_backend **backend_out, const char *sqlite_db)
goto cleanup;
backend->parent.read = &sqlite_backend__read;
backend->parent.read_unique_short_oid = &sqlite_backend__read_unique_short_oid;
backend->parent.read_header = &sqlite_backend__read_header;
backend->parent.write = &sqlite_backend__write;
backend->parent.exists = &sqlite_backend__exists;

15
src/odb_loose.c
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@ -524,6 +524,20 @@ int loose_backend__read(void **buffer_p, size_t *len_p, git_otype *type_p, git_o
return GIT_SUCCESS;
}
int loose_backend__read_unique_short_oid(git_oid *out_oid, void **buffer_p, size_t *len_p, git_otype *type_p, git_odb_backend *backend,
const git_oid *short_oid, unsigned int len)
{
if (len >= GIT_OID_HEXSZ) {
int error = loose_backend__read(buffer_p, len_p, type_p, backend, short_oid);
if (error == GIT_SUCCESS)
git_oid_cpy(out_oid, short_oid);
return error;
} else if (len < GIT_OID_HEXSZ) {
return git__throw(GIT_ENOTIMPLEMENTED, "Loose backend cannot search objects from short oid");
}
}
int loose_backend__exists(git_odb_backend *backend, const git_oid *oid)
{
char object_path[GIT_PATH_MAX];
@ -663,6 +677,7 @@ int git_odb_backend_loose(git_odb_backend **backend_out, const char *objects_dir
backend->fsync_object_files = 0;
backend->parent.read = &loose_backend__read;
backend->parent.read_unique_short_oid = &loose_backend__read_unique_short_oid;
backend->parent.read_header = &loose_backend__read_header;
backend->parent.writestream = &loose_backend__stream;
backend->parent.exists = &loose_backend__exists;

15
src/odb_pack.c
View File

@ -1364,6 +1364,20 @@ int pack_backend__read(void **buffer_p, size_t *len_p, git_otype *type_p, git_od
return GIT_SUCCESS;
}
int pack_backend__read_unique_short_oid(git_oid *out_oid, void **buffer_p, size_t *len_p, git_otype *type_p, git_odb_backend *backend,
const git_oid *short_oid, unsigned int len)
{
if (len >= GIT_OID_HEXSZ) {
int error = pack_backend__read(buffer_p, len_p, type_p, backend, short_oid);
if (error == GIT_SUCCESS)
git_oid_cpy(out_oid, short_oid);
return error;
} else if (len < GIT_OID_HEXSZ) {
return git__throw(GIT_ENOTIMPLEMENTED, "Pack backend cannot search objects from short oid");
}
}
int pack_backend__exists(git_odb_backend *backend, const git_oid *oid)
{
struct pack_entry e;
@ -1418,6 +1432,7 @@ int git_odb_backend_pack(git_odb_backend **backend_out, const char *objects_dir)
}
backend->parent.read = &pack_backend__read;
backend->parent.read_unique_short_oid = &pack_backend__read_unique_short_oid;
backend->parent.read_header = NULL;
backend->parent.exists = &pack_backend__exists;
backend->parent.free = &pack_backend__free;