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| 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 1.2 2008/11/07 03:29:34 drh 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 |
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