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src/subversion/subversion/libsvn_fs_base/fs.h  view on Meta::CPAN

/* Minimum format number that supports representation sharing.  This
   also brings in the support for storing SHA1 checksums.   */
#define SVN_FS_BASE__MIN_REP_SHARING_FORMAT       4

/* Minimum format number that supports the 'miscellaneous' table */
#define SVN_FS_BASE__MIN_MISCELLANY_FORMAT        4

/* Minimum format number that supports forward deltas */
#define SVN_FS_BASE__MIN_FORWARD_DELTAS_FORMAT    4

/* Minimum format number that supports node-origins tracking */
#define SVN_FS_BASE__MIN_NODE_ORIGINS_FORMAT      3

/* Minimum format number that supports mergeinfo */
#define SVN_FS_BASE__MIN_MERGEINFO_FORMAT         3

/* Minimum format number that supports svndiff version 1.  */
#define SVN_FS_BASE__MIN_SVNDIFF1_FORMAT          2

/* Return SVN_ERR_UNSUPPORTED_FEATURE if the version of filesystem FS does
   not indicate support for FEATURE (which REQUIRES a newer version). */
svn_error_t *
svn_fs_base__test_required_feature_format(svn_fs_t *fs,
                                          const char *feature,
                                          int requires);



/*** Miscellany keys. ***/

/* Revision at which the repo started using forward deltas. */
#define SVN_FS_BASE__MISC_FORWARD_DELTA_UPGRADE  "forward-delta-rev"



/*** The filesystem structure.  ***/

typedef struct base_fs_data_t
{
  /* A Berkeley DB environment for all the filesystem's databases.
     This establishes the scope of the filesystem's transactions.  */
  bdb_env_baton_t *bdb;

  /* The filesystem's various tables.  See `structure' for details.  */
  DB *changes;
  DB *copies;
  DB *nodes;
  DB *representations;
  DB *revisions;
  DB *strings;
  DB *transactions;
  DB *uuids;
  DB *locks;
  DB *lock_tokens;
  DB *node_origins;
  DB *miscellaneous;
  DB *checksum_reps;

  /* A boolean for tracking when we have a live Berkeley DB
     transaction trail alive. */
  svn_boolean_t in_txn_trail;

  /* The format number of this FS. */
  int format;

} base_fs_data_t;


/*** Filesystem Revision ***/
typedef struct revision_t
{
  /* id of the transaction that was committed to create this
     revision. */
  const char *txn_id;

} revision_t;


/*** Transaction Kind ***/
typedef enum transaction_kind_t
{
  transaction_kind_normal = 1,  /* normal, uncommitted */
  transaction_kind_committed,   /* committed */
  transaction_kind_dead         /* uncommitted and dead */

} transaction_kind_t;


/*** Filesystem Transaction ***/
typedef struct transaction_t
{
  /* kind of transaction. */
  transaction_kind_t kind;

  /* revision which this transaction was committed to create, or an
     invalid revision number if this transaction was never committed. */
  svn_revnum_t revision;

  /* property list (const char * name, svn_string_t * value).
     may be NULL if there are no properties.  */
  apr_hash_t *proplist;

  /* node revision id of the root node.  */
  const svn_fs_id_t *root_id;

  /* node revision id of the node which is the root of the revision
     upon which this txn is base.  (unfinished only) */
  const svn_fs_id_t *base_id;

  /* copies list (const char * copy_ids), or NULL if there have been
     no copies in this transaction.  */
  apr_array_header_t *copies;

} transaction_t;


/*** Node-Revision ***/
typedef struct node_revision_t
{
  /* node kind */