subversion/include/private/svn_fs_private.h

   1 /*
   2  * svn_fs_private.h: Private declarations for the filesystem layer to
   3  * be consumed by libsvn_fs* and non-libsvn_fs* modules.
   4  *
   5  * ====================================================================
   6  * Copyright (c) 2007 CollabNet.  All rights reserved.
   7  *
   8  * This software is licensed as described in the file COPYING, which
   9  * you should have received as part of this distribution.  The terms
  10  * are also available at http://subversion.tigris.org/license-1.html.
  11  * If newer versions of this license are posted there, you may use a
  12  * newer version instead, at your option.
  13  *
  14  * This software consists of voluntary contributions made by many
  15  * individuals.  For exact contribution history, see the revision
  16  * history and logs, available at http://subversion.tigris.org/.
  17  * ====================================================================
  18  */
  19
  20 #ifndef SVN_FS_PRIVATE_H
  21 #define SVN_FS_PRIVATE_H
  22
  23 #ifdef __cplusplus
  24 extern "C" {
  25 #endif /* __cplusplus */
  26
  27 /* The maximum length of a transaction name.  The Berkeley DB backend
  28    generates transaction names from a sequence expressed as a base 36
  29    number with a maximum of MAX_KEY_SIZE (currently 200) bytes.  The
  30    FSFS backend generates transaction names of the form
  31    <rev>-<base 36-number> where the base 36 number is a sequence value
  32    with a maximum length of MAX_KEY_SIZE bytes.  The maximum length is
  33    212, but use 220 just to have some extra space:
  34      10   -> 32 bit revision number
  35      1    -> '-'
  36      200  -> 200 digit base 36 number
  37      1    -> '\0'
  38  */
  39 #define SVN_FS__TXN_MAX_LEN 220
  40
  41 #ifdef __cplusplus
  42 }
  43 #endif /* __cplusplus */
  44
  45 #endif /* SVN_FS_PRIVATE_H */