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sqlite3

    1: # 2006 February 16
    2: #
    3: # The author disclaims copyright to this source code.  In place of
    4: # a legal notice, here is a blessing:
    5: #
    6: #    May you do good and not evil.
    7: #    May you find forgiveness for yourself and forgive others.
    8: #    May you share freely, never taking more than you give.
    9: #
   10: #***********************************************************************
   11: # 
   12: # This file contains code to verify that the SQLITE_UTF16_ALIGNED
   13: # flag passed into the sqlite3_create_collation() function insures
   14: # that all strings passed to that function are aligned on an even
   15: # byte boundary.
   16: #
   17: # $Id: utf16align.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $
   18: 
   19: set testdir [file dirname $argv0]
   20: source $testdir/tester.tcl
   21: 
   22: # Skip this entire test if we do not support UTF16
   23: #
   24: ifcapable !utf16 {
   25:   finish_test
   26:   return
   27: }
   28: 
   29: # Create a database with a UTF16 encoding.  Put in lots of string
   30: # data of varying lengths.
   31: #
   32: do_test utf16align-1.0 {
   33:   set unaligned_string_counter 0
   34:   add_alignment_test_collations [sqlite3_connection_pointer db]
   35:   execsql {
   36:     PRAGMA encoding=UTF16;
   37:     CREATE TABLE t1(
   38:       id INTEGER PRIMARY KEY,
   39:       spacer TEXT,
   40:       a TEXT COLLATE utf16_aligned,
   41:       b TEXT COLLATE utf16_unaligned
   42:     );
   43:     INSERT INTO t1(a) VALUES("abc");
   44:     INSERT INTO t1(a) VALUES("defghi");
   45:     INSERT INTO t1(a) VALUES("jklmnopqrstuv");
   46:     INSERT INTO t1(a) VALUES("wxyz0123456789-");
   47:     UPDATE t1 SET b=a||'-'||a;
   48:     INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1;
   49:     INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1;
   50:     INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1;
   51:     INSERT INTO t1(a,b) VALUES('one','two');
   52:     INSERT INTO t1(a,b) SELECT a, b FROM t1;
   53:     UPDATE t1 SET spacer = CASE WHEN rowid&1 THEN 'x' ELSE 'xx' END;
   54:     SELECT count(*) FROM t1;
   55:   }
   56: } 66
   57: do_test utf16align-1.1 {
   58:   set unaligned_string_counter
   59: } 0
   60: 
   61: # Creating an index that uses the unaligned collation.  We should see
   62: # some unaligned strings passed to the collating function.
   63: #
   64: do_test utf16align-1.2 {
   65:   execsql {
   66:     CREATE INDEX t1i1 ON t1(spacer, b);
   67:   }
   68:   # puts $unaligned_string_counter
   69:   expr {$unaligned_string_counter>0}
   70: } 1
   71: 
   72: # Create another index that uses the aligned collation.  This time
   73: # there should be no unaligned accesses
   74: #
   75: do_test utf16align-1.3 {
   76:   set unaligned_string_counter 0
   77:   execsql {
   78:     CREATE INDEX t1i2 ON t1(spacer, a);
   79:   }
   80:   expr {$unaligned_string_counter>0}
   81: } 0
   82: integrity_check utf16align-1.4
   83: 
   84: # ticket #3482
   85: #
   86: db close
   87: sqlite3 db :memory:
   88: do_test utf16align-2.1 {
   89:   db eval {
   90:     PRAGMA encoding=UTF16be;
   91:     SELECT hex(ltrim(x'6efcda'));
   92:   }
   93: } {6EFC}
   94: 
   95: finish_test