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/* cached_data.h --- cached (read) access to FSFS data
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
#ifndef SVN_LIBSVN_FS__CACHED_DATA_H
#define SVN_LIBSVN_FS__CACHED_DATA_H
#include "svn_pools.h"
#include "svn_fs.h"
#include "fs.h"
/* Resolve a FSFS quirk: if REP in FS is a "PLAIN" representation, its
* EXPANDED_SIZE element may be 0, in which case its value has to be taken
* from SIZE.
*
* This function ensures that EXPANDED_SIZE in REP always contains the
* actual value. No-op if REP is NULL. Uses SCRATCH_POOL for temporaries.
*/
svn_error_t *
svn_fs_fs__fixup_expanded_size(svn_fs_t *fs,
representation_t *rep,
apr_pool_t *scratch_pool);
/* Set *NODEREV_P to the node-revision for the node ID in FS. Do any
allocations in POOL. */
svn_error_t *
svn_fs_fs__get_node_revision(node_revision_t **noderev_p,
svn_fs_t *fs,
const svn_fs_id_t *id,
apr_pool_t *result_pool,
apr_pool_t *scratch_pool);
/* Set *ROOT_ID to the node-id for the root of revision REV in
filesystem FS. Do any allocations in POOL. */
svn_error_t *
svn_fs_fs__rev_get_root(svn_fs_id_t **root_id,
svn_fs_t *fs,
svn_revnum_t rev,
apr_pool_t *result_pool,
apr_pool_t *scratch_pool);
/* Verify that representation REP in FS can be accessed. Successive calls
to this function should pass a non-NULL value to HINT. In that case,
many file open / close operations can be eliminated.
Do any allocations in SCRATCH_POOL. */
svn_error_t *
svn_fs_fs__check_rep(representation_t *rep,
svn_fs_t *fs,
void **hint,
apr_pool_t *scratch_pool);
/* Follow the representation delta chain in FS starting with REP. The
number of reps (including REP) in the chain will be returned in
*CHAIN_LENGTH. *SHARD_COUNT will be set to the number of shards
accessed. Do any allocations in SCRATCH_POOL. */
svn_error_t *
svn_fs_fs__rep_chain_length(int *chain_length,
int *shard_count,
representation_t *rep,
svn_fs_t *fs,
apr_pool_t *scratch_pool);
/* Set *CONTENTS_P to be a readable svn_stream_t that receives the text
representation REP as seen in filesystem FS. If CACHE_FULLTEXT is
not set, bypass fulltext cache lookup for this rep and don't put the
reconstructed fulltext into cache.
Use POOL for allocations. */
svn_error_t *
svn_fs_fs__get_contents(svn_stream_t **contents_p,
svn_fs_t *fs,
representation_t *rep,
svn_boolean_t cache_fulltext,
apr_pool_t *pool);
/* Set *CONTENTS_P to be a readable svn_stream_t that receives the text
representation REP as seen in filesystem FS. Read the latest element
of the delta chain from FILE at offset OFFSET.
Use POOL for allocations. */
svn_error_t *
svn_fs_fs__get_contents_from_file(svn_stream_t **contents_p,
svn_fs_t *fs,
representation_t *rep,
apr_file_t *file,
apr_off_t offset,
apr_pool_t *pool);
/* Attempt to fetch the text representation of node-revision NODEREV as
seen in filesystem FS and pass it along with the BATON to the PROCESSOR.
Set *SUCCESS only of the data could be provided and the processing
had been called.
Use POOL for all allocations.
*/
svn_error_t *
svn_fs_fs__try_process_file_contents(svn_boolean_t *success,
svn_fs_t *fs,
node_revision_t *noderev,
svn_fs_process_contents_func_t processor,
void* baton,
apr_pool_t *pool);
/* Set *STREAM_P to a delta stream turning the contents of the file SOURCE into
the contents of the file TARGET, allocated in POOL.
If SOURCE is null, the empty string will be used. */
svn_error_t *
svn_fs_fs__get_file_delta_stream(svn_txdelta_stream_t **stream_p,
svn_fs_t *fs,
node_revision_t *source,
node_revision_t *target,
apr_pool_t *pool);
/* Set *ENTRIES to an apr_array_header_t of dirent structs that contain
the directory entries of node-revision NODEREV in filesystem FS. The
returned table is allocated in RESULT_POOL and entries are sorted
lexicographically. SCRATCH_POOL is used for temporary allocations. */
svn_error_t *
svn_fs_fs__rep_contents_dir(apr_array_header_t **entries_p,
svn_fs_t *fs,
node_revision_t *noderev,
apr_pool_t *result_pool,
apr_pool_t *scratch_pool);
/* Return the directory entry from ENTRIES that matches NAME. If no such
entry exists, return NULL. If HINT is not NULL, set *HINT to the array
index of the entry returned. Successive calls in a linear scan scenario
will be faster called with the same HINT variable. */
svn_fs_dirent_t *
svn_fs_fs__find_dir_entry(apr_array_header_t *entries,
const char *name,
int *hint);
/* Set *DIRENT to the entry identified by NAME in the directory given
by NODEREV in filesystem FS. If no such entry exits, *DIRENT will
be NULL. The returned object is allocated in RESULT_POOL; SCRATCH_POOL
used for temporary allocations. */
svn_error_t *
svn_fs_fs__rep_contents_dir_entry(svn_fs_dirent_t **dirent,
svn_fs_t *fs,
node_revision_t *noderev,
const char *name,
apr_pool_t *result_pool,
apr_pool_t *scratch_pool);
/* Set *PROPLIST to be an apr_hash_t containing the property list of
node-revision NODEREV as seen in filesystem FS. Use POOL for
temporary allocations. */
svn_error_t *
svn_fs_fs__get_proplist(apr_hash_t **proplist,
svn_fs_t *fs,
node_revision_t *noderev,
apr_pool_t *pool);
/* Create a changes retrieval context object in *RESULT_POOL and return it
* in *CONTEXT. It will allow svn_fs_x__get_changes to fetch consecutive
* blocks (one per invocation) from REV's changed paths list in FS. */
svn_error_t *
svn_fs_fs__create_changes_context(svn_fs_fs__changes_context_t **context,
svn_fs_t *fs,
svn_revnum_t rev,
apr_pool_t *result_pool);
/* Fetch the block of changes from the CONTEXT and return it in *CHANGES.
* Allocate the result in RESULT_POOL and use SCRATCH_POOL for temporaries.
*/
svn_error_t *
svn_fs_fs__get_changes(apr_array_header_t **changes,
svn_fs_fs__changes_context_t *context,
apr_pool_t *result_pool,
apr_pool_t *scratch_pool);
#endif
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