dag.h

subversion-1.4.3-1.tar.gz 配置svn的源码

   copy operation, and specifically which operation that was.

   PATH is the canonicalized absolute path at which this node is being
   created.

   TXN_ID is the Subversion transaction under which this occurs.  */
svn_error_t *svn_fs_fs__dag_clone_child(dag_node_t **child_p,
                                        dag_node_t *parent,
                                        const char *parent_path,
                                        const char *name,
                                        const char *copy_id,
                                        const char *txn_id,
                                        svn_boolean_t is_parent_copyroot,
                                        apr_pool_t *pool);


/* Delete the directory entry named NAME from PARENT, allocating from
   POOL.  PARENT must be mutable.  NAME must be a single path
   component; it cannot be a slash-separated directory path.  If the
   node being deleted is a mutable directory, remove all mutable nodes
   reachable from it.  TXN_ID is the Subversion transaction under
   which this occurs.

   If return SVN_ERR_FS_NO_SUCH_ENTRY, then there is no entry NAME in
   PARENT.  */
svn_error_t *svn_fs_fs__dag_delete(dag_node_t *parent,
                                   const char *name,
                                   const char *txn_id,
                                   apr_pool_t *pool);


/* Delete the node revision assigned to node ID from FS's `nodes'
   table, allocating from POOL.  Also delete any mutable
   representations and strings associated with that node revision.  ID
   may refer to a file or directory, which must be mutable.  TXN_ID is
   the Subversion transaction under which this occurs.

   NOTE: If ID represents a directory, and that directory has mutable
   children, you risk orphaning those children by leaving them
   dangling, disconnected from all DAG trees.  It is assumed that
   callers of this interface know what in the world they are doing.  */
svn_error_t *svn_fs_fs__dag_remove_node(svn_fs_t *fs,
                                        const svn_fs_id_t *id,
                                        const char *txn_id,
                                        apr_pool_t *pool);


/* Delete all mutable node revisions reachable from node ID, including
   ID itself, from FS's `nodes' table, allocating from POOL.  Also
   delete any mutable representations and strings associated with that
   node revision.  ID may refer to a file or directory, which may be
   mutable or immutable.  TXN_ID is the Subversion transaction under
   which this occurs.  */
svn_error_t *svn_fs_fs__dag_delete_if_mutable(svn_fs_t *fs,
                                              const svn_fs_id_t *id,
                                              const char *txn_id,
                                              apr_pool_t *pool);


/* Create a new mutable directory named NAME in PARENT.  Set *CHILD_P
   to a reference to the new node, allocated in POOL.  The new
   directory has no contents, and no properties.  PARENT must be
   mutable.  NAME must be a single path component; it cannot be a
   slash-separated directory path.  PARENT_PATH must be the
   canonicalized absolute path of the parent directory.  PARENT must
   not currently have an entry named NAME.  Do any temporary
   allocation in POOL.  TXN_ID is the Subversion transaction under
   which this occurs.  */
svn_error_t *svn_fs_fs__dag_make_dir(dag_node_t **child_p,
                                     dag_node_t *parent,
                                     const char *parent_path,
                                     const char *name,
                                     const char *txn_id,
                                     apr_pool_t *pool);



/* Files.  */


/* Set *CONTENTS to a readable generic stream which yields the
   contents of FILE.  Allocate the stream in POOL.

   If FILE is not a file, return SVN_ERR_FS_NOT_FILE.  */
svn_error_t *svn_fs_fs__dag_get_contents(svn_stream_t **contents,
                                         dag_node_t *file,
                                         apr_pool_t *pool);


/* Set *STREAM_P to a delta stream that will turn the contents of SOURCE into
   the contents of TARGET, allocated in POOL.  If SOURCE is null, the empty
   string will be used. */
svn_error_t *
svn_fs_fs__dag_get_file_delta_stream(svn_txdelta_stream_t **stream_p,
                                     dag_node_t *source,
                                     dag_node_t *target,
                                     apr_pool_t *pool);

/* Return a generic writable stream in *CONTENTS with which to set the
   contents of FILE.  Allocate the stream in POOL.  TXN_ID is the
   Subversion transaction under which this occurs.

   Any previous edits on the file will be deleted, and a new edit
   stream will be constructed.  */
svn_error_t *svn_fs_fs__dag_get_edit_stream(svn_stream_t **contents,
                                            dag_node_t *file,
                                            const char *txn_id,
                                            apr_pool_t *pool);


/* Signify the completion of edits to FILE made using the stream
   returned by svn_fs_fs__dag_get_edit_stream, allocating from POOL.
   TXN_ID is the Subversion transaction under which this occurs.

   If CHECKSUM is non-null, it must match the checksum for FILE's
   contents (note: this is not recalculated, the recorded checksum is
   used), else the error SVN_ERR_CHECKSUM_MISMATCH is returned.

   This operation is a no-op if no edits are present.  */
svn_error_t *svn_fs_fs__dag_finalize_edits(dag_node_t *file,
                                           const char *checksum,
                                           const char *txn_id,
                                           apr_pool_t *pool);


/* Set *LENGTH to the length of the contents of FILE, allocating from
   POOL. */
svn_error_t *svn_fs_fs__dag_file_length(svn_filesize_t *length,
                                        dag_node_t *file,
                                        apr_pool_t *pool);

/* Put the recorded MD5 checksum of FILE into DIGEST, allocating from
 * POOL.  DIGEST must point to APR_MD5_DIGESTSIZE bytes of storage.
 *
 * If no stored checksum is available, do not calculate the checksum,
 * just put all 0's into DIGEST.
 */
svn_error_t *
svn_fs_fs__dag_file_checksum(unsigned char digest[],
                             dag_node_t *file,
                             apr_pool_t *pool);

/* Create a new mutable file named NAME in PARENT.  Set *CHILD_P to a
   reference to the new node, allocated in POOL.  The new file's
   contents are the empty string, and it has no properties.  PARENT
   must be mutable.  NAME must be a single path component; it cannot
   be a slash-separated directory path.  PARENT_PATH must be the
   canonicalized absolute path of the parent directory.  TXN_ID is the
   Subversion transaction under which this occurs.  */
svn_error_t *svn_fs_fs__dag_make_file(dag_node_t **child_p,
                                      dag_node_t *parent,
                                      const char *parent_path,
                                      const char *name,
                                      const char *txn_id,
                                      apr_pool_t *pool);



/* Copies */

/* Make ENTRY in TO_NODE be a copy of FROM_NODE, allocating from POOL.
   TO_NODE must be mutable.  TXN_ID is the Subversion transaction
   under which this occurs.

   If PRESERVE_HISTORY is true, the new node will record that it was
   copied from FROM_PATH in FROM_REV; therefore, FROM_NODE should be
   the node found at FROM_PATH in FROM_REV, although this is not
   checked.  FROM_PATH should be canonicalized before being passed
   here.

   If PRESERVE_HISTORY is false, FROM_PATH and FROM_REV are ignored.  */
svn_error_t *svn_fs_fs__dag_copy(dag_node_t *to_node,
                                 const char *entry,
                                 dag_node_t *from_node,
                                 svn_boolean_t preserve_history,
                                 svn_revnum_t from_rev,
                                 const char *from_path,
                                 const char *txn_id,
                                 apr_pool_t *pool);


/* Comparison */

/* Find out what is the same between two nodes.

   If PROPS_CHANGED is non-null, set *PROPS_CHANGED to 1 if the two
   nodes have different property lists, or to 0 if same.

   If CONTENTS_CHANGED is non-null, set *CONTENTS_CHANGED to 1 if the
   two nodes have different contents, or to 0 if same.  For files,
   file contents are compared; for directories, the entries lists are
   compared.  If one is a file and the other is a directory, the one's
   contents will be compared to the other's entries list.  (Not
   terribly useful, I suppose, but that's the caller's business.)

   ### todo: This function only compares rep keys at the moment.  This
   may leave us with a slight chance of a false positive, though I
   don't really see how that would happen in practice.  Nevertheless,
   it should probably be fixed.  */
svn_error_t *svn_fs_fs__things_different(svn_boolean_t *props_changed,
                                         svn_boolean_t *contents_changed,
                                         dag_node_t *node1,
                                         dag_node_t *node2,
                                         apr_pool_t *pool);


/* Set *NODE_ID to the node-id of the coyproot of node NODE, or NULL
   if no copyroot exists.  Get any temporary allocations from POOL. */
svn_error_t *svn_fs_fs__dag_get_copyroot(svn_revnum_t *rev,
                                         const char **path,
                                         dag_node_t *node,
                                         apr_pool_t *pool);

/* Set *REV to the copyfrom revision associated with NODE.  Get any
   temporary allocations from POOL. */
svn_error_t *svn_fs_fs__dag_get_copyfrom_rev(svn_revnum_t *rev,
                                             dag_node_t *node,
                                             apr_pool_t *pool);

/* Set *PATH to the copyfrom path associated with NODE.  Get any
   temporary allocations from POOL. */
svn_error_t *svn_fs_fs__dag_get_copyfrom_path(const char **path,
                                              dag_node_t *node,
                                              apr_pool_t *pool);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* SVN_LIBSVN_FS_DAG_H */