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src/subversion/tools/server-side/fsfs-stats.c  view on Meta::CPAN

 *    "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.
 * ====================================================================
 */


#include <assert.h>

#include <apr.h>
#include <apr_general.h>
#include <apr_file_io.h>
#include <apr_poll.h>

#include "svn_pools.h"
#include "svn_diff.h"
#include "svn_io.h"
#include "svn_utf.h"
#include "svn_dirent_uri.h"
#include "svn_sorts.h"
#include "svn_delta.h"
#include "svn_hash.h"
#include "svn_cache_config.h"

#include "private/svn_string_private.h"
#include "private/svn_subr_private.h"
#include "private/svn_dep_compat.h"
#include "private/svn_cache.h"

#ifndef _
#define _(x) x
#endif

#define ERROR_TAG "fsfs-stats: "

/* We group representations into 2x2 different kinds plus one default:
 * [dir / file] x [text / prop]. The assignment is done by the first node
 * that references the respective representation.
 */
typedef enum rep_kind_t
{
  /* The representation is _directly_ unused, i.e. not referenced by any
   * noderev. However, some other representation may use it as delta base.
   * null value. Should not occur in real-word repositories. */
  unused_rep,

  /* a properties on directory rep  */
  dir_property_rep,

  /* a properties on file rep  */
  file_property_rep,

  /* a directory rep  */
  dir_rep,

  /* a file rep  */
  file_rep
} rep_kind_t;

/* A representation fragment.
 */
typedef struct representation_t
{
  /* absolute offset in the file */
  apr_size_t offset;

  /* item length in bytes */
  apr_size_t size;

  /* item length after de-deltification */
  apr_size_t expanded_size;

  /* deltification base, or NULL if there is none */
  struct representation_t *delta_base;

  /* revision that contains this representation
   * (may be referenced by other revisions, though) */
  svn_revnum_t revision;

  /* number of nodes that reference this representation */
  apr_uint32_t ref_count;

  /* length of the PLAIN / DELTA line in the source file in bytes */
  apr_uint16_t header_size;

  /* classification of the representation. values of rep_kind_t */
  char kind;

  /* the source content has a PLAIN header, so we may simply copy the
   * source content into the target */
  char is_plain;

} representation_t;

/* Represents a single revision.
 * There will be only one instance per revision. */
typedef struct revision_info_t
{
  /* number of this revision */
  svn_revnum_t revision;

  /* pack file offset (manifest value), 0 for non-packed files */
  apr_size_t offset;

  /* offset of the changes list relative to OFFSET */
  apr_size_t changes;

  /* length of the changes list on bytes */
  apr_size_t changes_len;

  /* offset of the changes list relative to OFFSET */
  apr_size_t change_count;

  /* first offset behind the revision data in the pack file (file length
   * for non-packed revs) */
  apr_size_t end;

  /* number of directory noderevs in this revision */
  apr_size_t dir_noderev_count;