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// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --expose-externalize-string --expose-gc --allow-natives-syntax
var size = 1024;
function dont_inline() { return "A"; }
%NeverOptimizeFunction(dont_inline);
function dont_inline2() { return "\u1234"; }
%NeverOptimizeFunction(dont_inline2);
function test() {
var str = "";
// Build an ascii cons string.
for (var i = 0; i < size; i++) {
str += String.fromCharCode(i & 0x7f);
}
assertTrue(isOneByteString(str));
var twoByteExternalWithOneByteData =
"AA" + dont_inline();
externalizeString(twoByteExternalWithOneByteData, true /* force two-byte */);
assertFalse(isOneByteString(twoByteExternalWithOneByteData));
var realTwoByteExternalString =
"\u1234\u1234\u1234\u1234" + dont_inline2();
externalizeString(realTwoByteExternalString);
assertFalse(isOneByteString(realTwoByteExternalString));
assertTrue(isOneByteString(["a", twoByteExternalWithOneByteData].join("")));
// Appending a two-byte string that contains only ascii chars should
// still produce an ascii cons.
var str1 = str + twoByteExternalWithOneByteData;
assertTrue(isOneByteString(str1));
// Force flattening of the string.
var old_length = str1.length - twoByteExternalWithOneByteData.length;
for (var i = 0; i < old_length; i++) {
assertEquals(String.fromCharCode(i & 0x7f), str1[i]);
}
for (var i = old_length; i < str1.length; i++) {
assertEquals("A", str1[i]);
}
// Flattened string should still be ascii.
assertTrue(isOneByteString(str1));
// Lower-casing an ascii string should produce ascii.
assertTrue(isOneByteString(str1.toLowerCase()));
assertFalse(isOneByteString(["a", realTwoByteExternalString].join("")));
// Appending a real two-byte string should produce a two-byte cons.
var str2 = str + realTwoByteExternalString;
assertFalse(isOneByteString(str2));
// Force flattening of the string.
old_length = str2.length - realTwoByteExternalString.length;
for (var i = 0; i < old_length; i++) {
assertEquals(String.fromCharCode(i & 0x7f), str2[i]);
}
for (var i = old_length; i < str.length; i++) {
assertEquals("\u1234", str2[i]);
}
// Flattened string should still be two-byte.
assertFalse(isOneByteString(str2));
}
// Run the test many times to ensure IC-s don't break things.
for (var i = 0; i < 10; i++) {
test();
}
// Clean up string to make Valgrind happy.
gc();
gc();
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