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# 2006 February 16
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file contains code to verify that the SQLITE_UTF16_ALIGNED
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# flag passed into the sqlite3_create_collation() function insures
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# that all strings passed to that function are aligned on an even
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# byte boundary.
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#
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# $Id: utf16align.test,v 1.1 2006/02/16 18:16:38 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Skip this entire test if we do not support UTF16
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#
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ifcapable !utf16 {
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finish_test
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return
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}
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# Create a database with a UTF16 encoding. Put in lots of string
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# data of varying lengths.
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#
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do_test utf16align-1.0 {
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set unaligned_string_counter 0
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add_alignment_test_collations [sqlite3_connection_pointer db]
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execsql {
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PRAGMA encoding=UTF16;
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CREATE TABLE t1(
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id INTEGER PRIMARY KEY,
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spacer TEXT,
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a TEXT COLLATE utf16_aligned,
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b TEXT COLLATE utf16_unaligned
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);
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INSERT INTO t1(a) VALUES("abc");
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INSERT INTO t1(a) VALUES("defghi");
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INSERT INTO t1(a) VALUES("jklmnopqrstuv");
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INSERT INTO t1(a) VALUES("wxyz0123456789-");
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UPDATE t1 SET b=a||'-'||a;
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INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1;
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INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1;
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INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1;
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INSERT INTO t1(a,b) VALUES('one','two');
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INSERT INTO t1(a,b) SELECT a, b FROM t1;
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UPDATE t1 SET spacer = CASE WHEN rowid&1 THEN 'x' ELSE 'xx' END;
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SELECT count(*) FROM t1;
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}
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} 66
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do_test utf16align-1.1 {
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set unaligned_string_counter
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} 0
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# Creating an index that uses the unaligned collation. We should see
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# some unaligned strings passed to the collating function.
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#
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do_test utf16align-1.2 {
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execsql {
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CREATE INDEX t1i1 ON t1(spacer, b);
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}
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# puts $unaligned_string_counter
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expr {$unaligned_string_counter>0}
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} 1
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# Create another index that uses the aligned collation. This time
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# there should be no unaligned accesses
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#
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do_test utf16align-1.3 {
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set unaligned_string_counter 0
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execsql {
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CREATE INDEX t1i2 ON t1(spacer, a);
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}
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expr {$unaligned_string_counter>0}
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} 0
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integrity_check utf16align-1.4
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finish_test
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