[sql] Import SQLite 3.17.0.

third_party/sqlite/src/ext/rbu/rbu_common.tcl

 # 2015 Aug 8
 #
 # The author disclaims copyright to this source code.  In place of
 # a legal notice, here is a blessing:
 #
 #    May you do good and not evil.
 #    May you find forgiveness for yourself and forgive others.
 #    May you share freely, never taking more than you give.
 #
 #***********************************************************************
 #
 
 if {![info exists testdir]} {
   set testdir [file join [file dirname [info script]] .. .. test]
 }
 source $testdir/tester.tcl
 
+proc check_prestep_state {target state} {
+  set oal_exists [file exists $target-oal]
+  set wal_exists [file exists $target-wal]
+  set progress [rbu progress]
+
+  if {($progress==0 && $state!="oal" && $state!="done")
+   || ($oal_exists && $wal_exists)
+   || ($progress>0 && $state=="oal" && (!$oal_exists || $wal_exists))
+   || ($state=="move" && (!$oal_exists || $wal_exists))
+   || ($state=="checkpoint" && ($oal_exists || !$wal_exists))
+   || ($state=="done" && ($oal_exists && $progress!=0))
+  } {
+    error "B: state=$state progress=$progress oal=$oal_exists wal=$wal_exists"
+  }
+}
+
+proc check_poststep_state {rc target state} {
+  if {$rc=="SQLITE_OK" || $rc=="SQLITE_DONE"} {
+    set oal_exists [file exists $target-oal]
+    set wal_exists [file exists $target-wal]
+    if {$state=="move" && ($oal_exists || !$wal_exists)} {
+      error "A: state=$state progress=$progress oal=$oal_exists wal=$wal_exists"
+    }
+  }
+}
+
 # Run the RBU in file $rbu on target database $target until completion.
 #
 proc run_rbu {target rbu} {
   sqlite3rbu rbu $target $rbu
   while 1 {
+    set state [rbu state]
+
+    check_prestep_state $target $state
     set rc [rbu step]
+    check_poststep_state $rc $target $state
+
     if {$rc!="SQLITE_OK"} break
   }
   rbu close
 }
 
 proc step_rbu {target rbu} {
   while 1 {
     sqlite3rbu rbu $target $rbu
+    set state [rbu state]
+    check_prestep_state $target $state
     set rc [rbu step]
+    check_poststep_state $rc $target $state
     rbu close
     if {$rc != "SQLITE_OK"} break
   }
   set rc
 }
 
+proc do_rbu_vacuum_test {tn step} {
+  uplevel [list do_test $tn.1 {
+    if {$step==0} { sqlite3rbu_vacuum rbu test.db state.db }
+    while 1 {
+      if {$step==1} { sqlite3rbu_vacuum rbu test.db state.db }
+      set state [rbu state]
+      check_prestep_state test.db $state
+      set rc [rbu step]
+      check_poststep_state $rc test.db $state
+      if {$rc!="SQLITE_OK"} break
+      if {$step==1} { rbu close }
+    }
+    rbu close
+  } {SQLITE_DONE}]
+
+  uplevel [list do_execsql_test $tn.2 {
+    PRAGMA integrity_check
+  } ok]
+}
+