Fossil

}

/*
** Return TRUE if the schema is out-of-date
*/
int db_schema_is_outofdate(void){
  return strcmp(g.zAuxSchema,AUX_SCHEMA_MIN)<0
      || strcmp(g.zAuxSchema,AUX_SCHEMA_MAX)>0;
}

/*
** Return true if the database is writeable
*/
int db_is_writeable(const char *zName){
  return g.db!=0 && !sqlite3_db_readonly(g.db, db_name(zName));

}

/*
** Add a single entry to the mlink table.  Also add the filename to
** the filename table if it is not there already.
*/
static void add_one_mlink(
  int pmid,                 /* The parent manifest */
  const char *zFromUuid,    /* UUID for content in parent */
  int mid,                  /* The record ID of the manifest */
  const char *zToUuid,      /* UUID for content in child */
  const char *zFilename,    /* Filename */
  const char *zPrior,       /* Previous filename. NULL if unchanged */
  int isPublic,             /* True if mid is not a private manifest */
  int isPrimary,            /* pmid is the primary parent of mid */
  int mperm                 /* 1: exec, 2: symlink */
){
  int fnid, pfnid, pid, fid;
  static Stmt s1;

  fnid = filename_to_fnid(zFilename);
  if( zPrior==0 ){

  if( zToUuid==0 || zToUuid[0]==0 ){
    fid = 0;
  }else{
    fid = uuid_to_rid(zToUuid, 1);
    if( isPublic ) content_make_public(fid);
  }
  db_static_prepare(&s1,
    "INSERT INTO mlink(mid,fid,pmid,pid,fnid,pfnid,mperm,isaux)"
    "VALUES(:m,:f,:pm,:p,:n,:pfn,:mp,:isaux)"
  );
  db_bind_int(&s1, ":m", mid);
  db_bind_int(&s1, ":f", fid);
  db_bind_int(&s1, ":pm", pmid);
  db_bind_int(&s1, ":p", pid);
  db_bind_int(&s1, ":n", fnid);
  db_bind_int(&s1, ":pfn", pfnid);
  db_bind_int(&s1, ":mp", mperm);
  db_bind_int(&s1, ":isaux", isPrimary==0);
  db_exec(&s1);
  if( pid && fid ){
    content_deltify(pid, fid, 0);
  }
}

/*

** A single mlink entry is added for every file that changed content,
** name, and/or permissions going from pid to cid.
**
** Deleted files have mlink.fid=0.
** Added files have mlink.pid=0.
** Edited files have both mlink.pid!=0 and mlink.fid!=0
*/
static void add_mlink(
  int pmid, Manifest *pParent,    /* Parent check-in */
  int mid,  Manifest *pChild,     /* The child check-in */
  int isPrim                      /* TRUE if pmid is the primary parent of mid */
){
  Blob otherContent;
  int otherRid;
  int i, rc;
  ManifestFile *pChildFile, *pParentFile;
  Manifest **ppOther;
  static Stmt eq;
  int isPublic;                /* True if pChild is non-private */

  /* If mlink table entires are already exist for the pmid-to-mid transition,
  ** then abort early doing no work.
  */
  db_static_prepare(&eq, "SELECT 1 FROM mlink WHERE mid=:mid AND pmid=:pmid");
  db_bind_int(&eq, ":mid", mid);
  db_bind_int(&eq, ":pmid", pmid);
  rc = db_step(&eq);
  db_reset(&eq);
  if( rc==SQLITE_ROW ) return;

  /* Compute the value of the missing pParent or pChild parameter.
  ** Fetch the baseline checkins for both.
  */
  assert( pParent==0 || pChild==0 );
  if( pParent==0 ){
    ppOther = &pParent;
    otherRid = pmid;
  }else{
    ppOther = &pChild;
    otherRid = mid;
  }
  if( (*ppOther = manifest_cache_find(otherRid))==0 ){
    content_get(otherRid, &otherContent);
    if( blob_size(&otherContent)==0 ) return;
    *ppOther = manifest_parse(&otherContent, otherRid, 0);
    if( *ppOther==0 ) return;
  }
  if( fetch_baseline(pParent, 0) || fetch_baseline(pChild, 0) ){
    manifest_destroy(*ppOther);
    return;
  }
  isPublic = !content_is_private(mid);

  /* Try to make the parent manifest a delta from the child, if that
  ** is an appropriate thing to do.  For a new baseline, make the
  ** previous baseline a delta from the current baseline.
  */
  if( (pParent->zBaseline==0)==(pChild->zBaseline==0) ){
    content_deltify(pmid, mid, 0);
  }else if( pChild->zBaseline==0 && pParent->zBaseline!=0 ){
    content_deltify(pParent->pBaseline->rid, mid, 0);
  }

  /* Remember all children less than a few seconds younger than their parent,
  ** as we might want to fudge the times for those children.
  */
  if( pChild->rDate<pParent->rDate+AGE_FUDGE_WINDOW
      && manifest_crosslink_busy

  */
  for(i=0, pChildFile=pChild->aFile; i<pChild->nFile; i++, pChildFile++){
    int mperm = manifest_file_mperm(pChildFile);
    if( pChildFile->zPrior ){
       pParentFile = manifest_file_seek(pParent, pChildFile->zPrior, 0);
       if( pParentFile ){
         /* File with name change */
         add_one_mlink(pmid, pParentFile->zUuid, mid, pChildFile->zUuid,
                       pChildFile->zName, pChildFile->zPrior,
                       isPublic, isPrim, mperm);
       }else{
         /* File name changed, but the old name is not found in the parent!
         ** Treat this like a new file. */
         add_one_mlink(pmid, 0, mid, pChildFile->zUuid, pChildFile->zName, 0,
                       isPublic, isPrim, mperm);
       }
    }else{
       pParentFile = manifest_file_seek(pParent, pChildFile->zName, 0);
       if( pParentFile==0 ){
         if( pChildFile->zUuid ){
           /* A new file */
           add_one_mlink(pmid, 0, mid, pChildFile->zUuid, pChildFile->zName, 0,
                         isPublic, isPrim, mperm);
         }
       }else if( fossil_strcmp(pChildFile->zUuid, pParentFile->zUuid)!=0
              || manifest_file_mperm(pParentFile)!=mperm ){
         /* Changes in file content or permissions */
         add_one_mlink(pmid, pParentFile->zUuid, mid, pChildFile->zUuid,
                       pChildFile->zName, 0, isPublic, isPrim, mperm);
       }
    }
  }
  if( pParent->zBaseline && pChild->zBaseline ){
    /* Both parent and child are delta manifests.  Look for files that
    ** are deleted or modified in the parent but which reappear or revert
    ** to baseline in the child and show such files as being added or changed
    ** in the child. */
    for(i=0, pParentFile=pParent->aFile; i<pParent->nFile; i++, pParentFile++){
      if( pParentFile->zUuid ){
        pChildFile = manifest_file_seek_base(pChild, pParentFile->zName, 0);
        if( pChildFile==0 ){
          /* The child file reverts to baseline.  Show this as a change */
          pChildFile = manifest_file_seek(pChild, pParentFile->zName, 0);
          if( pChildFile ){
            add_one_mlink(pmid, pParentFile->zUuid, mid, pChildFile->zUuid,
                          pChildFile->zName, 0, isPublic, isPrim,
                          manifest_file_mperm(pChildFile));
          }
        }
      }else{
        pChildFile = manifest_file_seek(pChild, pParentFile->zName, 0);
        if( pChildFile ){
          /* File resurrected in the child after having been deleted in
          ** the parent.  Show this as an added file. */
          add_one_mlink(pmid, 0, mid, pChildFile->zUuid, pChildFile->zName, 0,
                        isPublic, isPrim, manifest_file_mperm(pChildFile));
        }
      }
    }
  }else if( pChild->zBaseline==0 ){
    /* pChild is a baseline.  Look for files that are present in pParent
    ** but are missing from pChild and mark them as having been deleted. */
    manifest_file_rewind(pParent);
    while( (pParentFile = manifest_file_next(pParent,0))!=0 ){
      pChildFile = manifest_file_seek(pChild, pParentFile->zName, 0);
      if( pChildFile==0 && pParentFile->zUuid!=0 ){
        add_one_mlink(pmid, pParentFile->zUuid, mid, 0, pParentFile->zName, 0,
                      isPublic, isPrim, 0);
      }
    }
  }
  manifest_cache_insert(*ppOther);
}

/*

      char zBaseId[30];
      if( p->zBaseline ){
        sqlite3_snprintf(sizeof(zBaseId), zBaseId, "%d",
                         uuid_to_rid(p->zBaseline,1));
      }else{
        sqlite3_snprintf(sizeof(zBaseId), zBaseId, "NULL");
      }

      for(i=0; i<p->nParent; i++){
        int pid = uuid_to_rid(p->azParent[i], 1);


        db_multi_exec(
           "INSERT OR IGNORE INTO plink(pid, cid, isprim, mtime, baseid)"
           "VALUES(%d, %d, %d, %.17g, %s)",
           pid, rid, i==0, p->rDate, zBaseId/*safe-for-%s*/);









        add_mlink(pid, 0, rid, p, i==0);
        if( i==0 ) parentid = pid;
      }
      if( p->nParent>1 ){
        /* Remove incorrect MLINK create-file entries that arise when a
        ** file is added by merge. */
        db_multi_exec(
           "DELETE FROM mlink"
           " WHERE mid=%d"
           "   AND pid=0"
           "   AND fnid IN "
           "  (SELECT fnid FROM mlink WHERE mid=%d GROUP BY fnid"
           "    HAVING count(*)<%d)",
           rid, rid, p->nParent
        );
      }
      db_prepare(&q, "SELECT cid, isprim FROM plink WHERE pid=%d", rid);
      while( db_step(&q)==SQLITE_ROW ){
        int cid = db_column_int(&q, 0);
        int isprim = db_column_int(&q, 1);
        add_mlink(rid, p, cid, 0, isprim);
      }
      db_finalize(&q);
      if( p->nParent==0 ){
        /* For root files (files without parents) add mlink entries
        ** showing all content as new. */
        int isPublic = !content_is_private(rid);
        for(i=0; i<p->nFile; i++){
          add_one_mlink(0, 0, rid, p->aFile[i].zUuid, p->aFile[i].zName, 0,
                        isPublic, 1, manifest_file_mperm(&p->aFile[i]));
        }
      }
      db_multi_exec(
        "REPLACE INTO event(type,mtime,objid,user,comment,"
                           "bgcolor,euser,ecomment,omtime)"
        "VALUES('ci',"
        "  coalesce("

** changes.  The aux tables have an arbitrary version number (typically
** a date) which can change frequently.  When the content schema changes,
** we have to execute special procedures to update the schema.  When
** the aux schema changes, all we need to do is rebuild the database.
*/
#define CONTENT_SCHEMA  "2"
#define AUX_SCHEMA_MIN  "2011-04-25 19:50"
#define AUX_SCHEMA_MAX  "2015-01-24"
/* NB:  Some features require the latest schema.  Warning or error messages
** will appear if an older schema is used.  However, the older schemas are
** adequate for many common functions. */

#endif /* INTERFACE */


/*
** The schema for a repository database.
**

@ CREATE TABLE filename(
@   fnid INTEGER PRIMARY KEY,    -- Filename ID
@   name TEXT UNIQUE             -- Name of file page
@ );
@
@ -- Linkages between checkins, files created by each checkin, and
@ -- the names of those files.
@ -- 
@ -- Each entry represents a file that changed content from pid to fid
@ -- due to the check-in that goes from pmid to mid.  fnid is the name
@ -- of the file in the mid check-in.  If the file was renamed as part
@ -- of the mid check-in, then pfnid is the previous filename.
@
@ -- There can be multiple entries for (mid,fid) if the mid checkin was
@ -- a merge.  Entries with isaux==0 are from the primary parent.  Merge
@ -- parents have isaux set to true.
@ --
@ -- Field name mnemonics:
@ --    mid = Manifest ID.  (Each check-in is stored as a "Manifest")
@ --    fid = File ID.
@ --    pmid = Parent Manifest ID.
@ --    pid = Parent file ID.
@ --    fnid = File Name ID.
@ --    pfnid = Parent File Name ID.
@ --    isaux = pmid IS AUXiliary parent, not primary parent
@ --
@ -- pid==0 if the file is added by checkin mid.
@ -- fid==0 if the file is removed by checkin mid.
@ --
@ CREATE TABLE mlink(
@   mid INTEGER REFERENCES plink(cid),  -- Checkin that contains fid
@   fid INTEGER REFERENCES blob,        -- New file content. 0 if deleted
@   pmid INTEGER REFERENCES plink(cid), -- Checkin that contains pid
@   pid INTEGER REFERENCES blob,        -- Prev file content. 0 if new

@   fnid INTEGER REFERENCES filename,   -- Name of the file
@   pfnid INTEGER REFERENCES filename,  -- Previous name. 0 if unchanged
@   mperm INTEGER,                      -- File permissions.  1==exec
@   isaux BOOLEAN DEFAULT 0             -- TRUE if pmid is the primary
@ );
@ CREATE INDEX mlink_i1 ON mlink(mid);
@ CREATE INDEX mlink_i2 ON mlink(fnid);
@ CREATE INDEX mlink_i3 ON mlink(fid);
@ CREATE INDEX mlink_i4 ON mlink(pid);
@
@ -- Parent/child linkages between checkins
@ --
@ CREATE TABLE plink(
@   pid INTEGER REFERENCES blob,    -- Parent manifest
@   cid INTEGER REFERENCES blob,    -- Child manifest
@   isprim BOOLEAN,                 -- pid is the primary parent of cid
@   mtime DATETIME,                 -- the date/time stamp on cid.  Julian day.
@   baseid INTEGER REFERENCES blob, -- Baseline if cid is a delta manifest.
@   UNIQUE(pid, cid)
@ );
@ CREATE INDEX plink_i2 ON plink(cid,pid);
@
@ -- A "leaf" checkin is a checkin that has no children in the same
@ -- branch.  The set of all leaves is easily computed with a join,
@ -- between the plink and tagxref tables, but it is a slower join for

@ -- done by an --integrate merge.  The difference between vfile.chnged==3|5
@ -- and a regular add is that with vfile.chnged==3|5 we know that the
@ -- current version of the file is already in the repository.
@ --
@ CREATE TABLE vfile(
@   id INTEGER PRIMARY KEY,           -- ID of the checked out file
@   vid INTEGER REFERENCES blob,      -- The baseline this file is part of.
@   chnged INT DEFAULT 0,  -- 0:unchng 1:edit 2:m-chng 3:m-add 4:i-chng 5:i-add
@   deleted BOOLEAN DEFAULT 0,        -- True if deleted
@   isexe BOOLEAN,                    -- True if file should be executable
@   islink BOOLEAN,                   -- True if file should be symlink
@   rid INTEGER,                      -- Originally from this repository record
@   mrid INTEGER,                     -- Based on this record due to a merge
@   mtime INTEGER,                    -- Mtime of file on disk. sec since 1970
@   pathname TEXT,                    -- Full pathname relative to root