# 2006 February 16 # # 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. # #*********************************************************************** # # This file contains code to verify that the SQLITE_UTF16_ALIGNED # flag passed into the sqlite3_create_collation() function insures # that all strings passed to that function are aligned on an even # byte boundary. # # $Id: utf16align.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # Skip this entire test if we do not support UTF16 # ifcapable !utf16 { finish_test return } # Create a database with a UTF16 encoding. Put in lots of string # data of varying lengths. # do_test utf16align-1.0 { set unaligned_string_counter 0 add_alignment_test_collations [sqlite3_connection_pointer db] execsql { PRAGMA encoding=UTF16; CREATE TABLE t1( id INTEGER PRIMARY KEY, spacer TEXT, a TEXT COLLATE utf16_aligned, b TEXT COLLATE utf16_unaligned ); INSERT INTO t1(a) VALUES("abc"); INSERT INTO t1(a) VALUES("defghi"); INSERT INTO t1(a) VALUES("jklmnopqrstuv"); INSERT INTO t1(a) VALUES("wxyz0123456789-"); UPDATE t1 SET b=a||'-'||a; INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1; INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1; INSERT INTO t1(a,b) SELECT a||b, b||a FROM t1; INSERT INTO t1(a,b) VALUES('one','two'); INSERT INTO t1(a,b) SELECT a, b FROM t1; UPDATE t1 SET spacer = CASE WHEN rowid&1 THEN 'x' ELSE 'xx' END; SELECT count(*) FROM t1; } } 66 do_test utf16align-1.1 { set unaligned_string_counter } 0 # Creating an index that uses the unaligned collation. We should see # some unaligned strings passed to the collating function. # do_test utf16align-1.2 { execsql { CREATE INDEX t1i1 ON t1(spacer, b); } # puts $unaligned_string_counter expr {$unaligned_string_counter>0} } 1 # Create another index that uses the aligned collation. This time # there should be no unaligned accesses # do_test utf16align-1.3 { set unaligned_string_counter 0 execsql { CREATE INDEX t1i2 ON t1(spacer, a); } expr {$unaligned_string_counter>0} } 0 integrity_check utf16align-1.4 # ticket #3482 # db close sqlite3 db :memory: do_test utf16align-2.1 { db eval { PRAGMA encoding=UTF16be; SELECT hex(ltrim(x'6efcda')); } } {6EFC} finish_test