Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 28 | // Flags: --expose-externalize-string --expose-gc |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 29 | |
| 30 | var size = 1024; |
| 31 | |
| 32 | function test() { |
| 33 | var str = ""; |
| 34 | |
| 35 | // Build an ascii cons string. |
| 36 | for (var i = 0; i < size; i++) { |
| 37 | str += String.fromCharCode(i & 0x7f); |
| 38 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 39 | assertTrue(isOneByteString(str)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 40 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 41 | var twoByteExternalWithOneByteData = |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 42 | "AA" + (function() { return "A"; })(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 43 | externalizeString(twoByteExternalWithOneByteData, true /* force two-byte */); |
| 44 | assertFalse(isOneByteString(twoByteExternalWithOneByteData)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 45 | |
| 46 | var realTwoByteExternalString = |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 47 | "\u1234\u1234\u1234\u1234" + (function() { return "\u1234"; })(); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 48 | externalizeString(realTwoByteExternalString); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 49 | assertFalse(isOneByteString(realTwoByteExternalString)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 50 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 51 | assertTrue(isOneByteString(["a", twoByteExternalWithOneByteData].join(""))); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 52 | |
| 53 | // Appending a two-byte string that contains only ascii chars should |
| 54 | // still produce an ascii cons. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 55 | var str1 = str + twoByteExternalWithOneByteData; |
| 56 | assertTrue(isOneByteString(str1)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 57 | |
| 58 | // Force flattening of the string. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 59 | var old_length = str1.length - twoByteExternalWithOneByteData.length; |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 60 | for (var i = 0; i < old_length; i++) { |
| 61 | assertEquals(String.fromCharCode(i & 0x7f), str1[i]); |
| 62 | } |
| 63 | for (var i = old_length; i < str1.length; i++) { |
| 64 | assertEquals("A", str1[i]); |
| 65 | } |
| 66 | |
| 67 | // Flattened string should still be ascii. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 68 | assertTrue(isOneByteString(str1)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 69 | |
| 70 | // Lower-casing an ascii string should produce ascii. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 71 | assertTrue(isOneByteString(str1.toLowerCase())); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 72 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 73 | assertFalse(isOneByteString(["a", realTwoByteExternalString].join(""))); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 74 | |
| 75 | // Appending a real two-byte string should produce a two-byte cons. |
| 76 | var str2 = str + realTwoByteExternalString; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 77 | assertFalse(isOneByteString(str2)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 78 | |
| 79 | // Force flattening of the string. |
| 80 | old_length = str2.length - realTwoByteExternalString.length; |
| 81 | for (var i = 0; i < old_length; i++) { |
| 82 | assertEquals(String.fromCharCode(i & 0x7f), str2[i]); |
| 83 | } |
| 84 | for (var i = old_length; i < str.length; i++) { |
| 85 | assertEquals("\u1234", str2[i]); |
| 86 | } |
| 87 | |
| 88 | // Flattened string should still be two-byte. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 89 | assertFalse(isOneByteString(str2)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | // Run the test many times to ensure IC-s don't break things. |
| 93 | for (var i = 0; i < 10; i++) { |
| 94 | test(); |
| 95 | } |
Teng-Hui Zhu | 3e5fa29 | 2010-11-09 16:16:48 -0800 | [diff] [blame] | 96 | |
| 97 | // Clean up string to make Valgrind happy. |
| 98 | gc(); |
| 99 | gc(); |