1 // Copyright 2011 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 28 // Flags: --expose-externalize-string --allow-natives-syntax 29 30 var s = 'abcdefghijklmn'; 31 assertEquals(s, s.substr()); 32 assertEquals(s, s.substr(0)); 33 assertEquals(s, s.substr('0')); 34 assertEquals(s, s.substr(void 0)); 35 assertEquals(s, s.substr(null)); 36 assertEquals(s, s.substr(false)); 37 assertEquals(s, s.substr(0.9)); 38 assertEquals(s, s.substr({ valueOf: function() { return 0; } })); 39 assertEquals(s, s.substr({ toString: function() { return '0'; } })); 40 41 var s1 = s.substring(1); 42 assertEquals(s1, s.substr(1)); 43 assertEquals(s1, s.substr('1')); 44 assertEquals(s1, s.substr(true)); 45 assertEquals(s1, s.substr(1.1)); 46 assertEquals(s1, s.substr({ valueOf: function() { return 1; } })); 47 assertEquals(s1, s.substr({ toString: function() { return '1'; } })); 48 49 50 assertEquals(s.substring(s.length - 1), s.substr(-1)); 51 assertEquals(s.substring(s.length - 1), s.substr(-1.2)); 52 assertEquals(s.substring(s.length - 1), s.substr(-1.7)); 53 assertEquals(s.substring(s.length - 2), s.substr(-2)); 54 assertEquals(s.substring(s.length - 2), s.substr(-2.3)); 55 assertEquals(s.substring(s.length - 2, s.length - 1), s.substr(-2, 1)); 56 assertEquals(s, s.substr(-100)); 57 assertEquals('abc', s.substr(-100, 3)); 58 assertEquals(s1, s.substr(-s.length + 1)); 59 60 // assertEquals('', s.substr(0, void 0)); // smjs and rhino 61 assertEquals('abcdefghijklmn', s.substr(0, void 0)); // kjs and v8 62 assertEquals('', s.substr(0, null)); 63 assertEquals(s, s.substr(0, String(s.length))); 64 assertEquals('a', s.substr(0, true)); 65 66 67 // Test substrings of different lengths and alignments. 68 // First ASCII. 69 var x = "ASCII"; 70 for (var i = 0; i < 25; i++) { 71 x += (i >> 4).toString(16) + (i & 0x0f).toString(16); 72 } 73 /x/.exec(x); // Try to force a flatten. 74 for (var i = 5; i < 25; i++) { 75 for (var j = 0; j < 25; j++) { 76 var z = x.substring(i, i+j); 77 var w = Math.random() * 42; // Allocate something new in new-space. 78 assertEquals(j, z.length); 79 for (var k = 0; k < j; k++) { 80 assertEquals(x.charAt(i+k), z.charAt(k)); 81 } 82 } 83 } 84 // Then two-byte strings. 85 x = "UC16\u2028"; // Non-ascii char forces two-byte string. 86 for (var i = 0; i < 25; i++) { 87 x += (i >> 4).toString(16) + (i & 0x0f).toString(16); 88 } 89 /x/.exec(x); // Try to force a flatten. 90 for (var i = 5; i < 25; i++) { 91 for (var j = 0; j < 25; j++) { 92 var z = x.substring(i, i + j); 93 var w = Math.random() * 42; // Allocate something new in new-space. 94 assertEquals(j, z.length); 95 for (var k = 0; k < j; k++) { 96 assertEquals(x.charAt(i+k), z.charAt(k)); 97 } 98 } 99 } 100 101 // Keep creating strings to to force allocation failure on substring creation. 102 var x = "0123456789ABCDEF"; 103 for (var i = 0; i < 8; i++) x += x; 104 var xl = x.length; 105 var cache = []; 106 for (var i = 0; i < 1000; i++) { 107 var z = x.substring(i % xl); 108 assertEquals(xl - (i % xl), z.length); 109 cache.push(z); 110 } 111 112 113 // Same with two-byte strings 114 var x = "\u2028123456789ABCDEF"; 115 for (var i = 0; i < 8; i++) x += x; 116 var xl = x.length; 117 var cache = []; 118 for (var i = 0; i < 1000; i++) { 119 var z = x.substring(i % xl); 120 assertEquals(xl - (i % xl), z.length); 121 cache.push(z); 122 } 123 124 // Substring of substring. 125 var cache = []; 126 var last = x; 127 var offset = 0; 128 for (var i = 0; i < 64; i++) { 129 var z = last.substring(i); 130 last = z; 131 cache.push(z); 132 offset += i; 133 } 134 for (var i = 63; i >= 0; i--) { 135 var z = cache.pop(); 136 assertTrue(/\u2028123456789ABCDEF/.test(z)); 137 assertEquals(xl - offset, z.length); 138 assertEquals(x.charAt(i*(i+1)/2), z.charAt(0)); 139 offset -= i; 140 } 141 142 // Test charAt for different strings. 143 function f(s1, s2, s3, i) { 144 assertEquals(String.fromCharCode(97+i%11), s1.charAt(i%11)); 145 assertEquals(String.fromCharCode(97+i%11), s2.charAt(i%11)); 146 assertEquals(String.fromCharCode(98+i%11), s3.charAt(i%11)); 147 assertEquals(String.fromCharCode(101), s3.charAt(3)); 148 } 149 150 flat = "abcdefghijkl12345"; 151 cons = flat + flat.toUpperCase(); 152 slice = "abcdefghijklmn12345".slice(1, -1); 153 for ( var i = 0; i < 1000; i++) { 154 f(flat, cons, slice, i); 155 } 156 flat = "abcdefghijkl1\u20232345"; 157 cons = flat + flat.toUpperCase(); 158 slice = "abcdefghijklmn1\u20232345".slice(1, -1); 159 for ( var i = 0; i < 1000; i++) { 160 f(flat, cons, slice, i); 161 } 162 163 // Short substrings. 164 flat = "abcdefghijkl12345"; 165 cons = flat + flat.toUpperCase(); 166 /x/.exec(cons); // Flatten cons 167 slice = "abcdefghijklmn12345".slice(1, -1); 168 assertEquals("cdefg", flat.substr(2, 5)); 169 assertEquals("cdefg", cons.substr(2, 5)); 170 assertEquals("cdefg", slice.substr(1, 5)); 171 172 flat = "abc\u1234defghijkl12345"; 173 cons = flat + flat.toUpperCase(); 174 /x/.exec(cons); // Flatten cons 175 slice = "abc\u1234defghijklmn12345".slice(1, -1); 176 assertEquals("c\u1234def", flat.substr(2, 5)); 177 assertEquals("c\u1234def", cons.substr(2, 5)); 178 assertEquals("c\u1234def", slice.substr(1, 5)); 179 180 // Concatenate substrings. 181 var ascii = 'abcdefghijklmnop'; 182 var utf = '\u03B1\u03B2\u03B3\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9\u03BA\u03BB'; 183 assertEquals("klmno", ascii.substring(10,15) + ascii.substring(16)); 184 assertEquals("\u03B4\u03B7", utf.substring(3,4) + utf.substring(6,7)); 185 assertEquals("klp", ascii.substring(10,12) + ascii.substring(15,16)); 186 assertEquals("\u03B1\u03B4\u03B5", utf.substring(0,1) + utf.substring(5,3)); 187 assertEquals("", ascii.substring(16) + utf.substring(16)); 188 assertEquals("bcdef\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9", 189 ascii.substring(1,6) + utf.substring(3,9)); 190 assertEquals("\u03B4\u03B5\u03B6\u03B7\u03B8\u03B9abcdefghijklmnop", 191 utf.substring(3,9) + ascii); 192 assertEquals("\u03B2\u03B3\u03B4\u03B5\u03B4\u03B5\u03B6\u03B7", 193 utf.substring(5,1) + utf.substring(3,7)); 194 195 // Externalizing strings. 196 var a = "internalized dummy"; 197 a = "123456789" + "qwertyuiopasdfghjklzxcvbnm"; 198 var b = "23456789qwertyuiopasdfghjklzxcvbn" 199 assertEquals(a.slice(1,-1), b); 200 201 assertTrue(isOneByteString(a)); 202 externalizeString(a, true); 203 assertFalse(isOneByteString(a)); 204 205 assertEquals(a.slice(1,-1), b); 206 assertTrue(/3456789qwe/.test(a)); 207 assertEquals(5, a.indexOf("678")); 208 assertEquals("12345", a.split("6")[0]); 209 210 // Create a slice with an external string as parent string. 211 var c = a.slice(1,-1); 212 213 function test_crankshaft() { 214 for (var i = 0; i < 20; i++) { 215 assertEquals(b.charAt(i), a.charAt(i + 1)); 216 assertEquals(b.charAt(i), c.charAt(i)); 217 assertEquals(b.charAt(4), c.charAt(4)); 218 assertTrue(/3456789qwe/.test(c)); 219 assertEquals(4, c.indexOf("678")); 220 assertEquals("2345", c.split("6")[0]); 221 } 222 } 223 224 test_crankshaft(); 225 %OptimizeFunctionOnNextCall(test_crankshaft); 226 test_crankshaft(); 227 228 var s1 = "12345678901234567890"; 229 var s2 = "abcdefghijklmnopqrstuvwxyz"; 230 var c1 = s1 + s2; 231 var c2 = s1 + c1 + s2; 232 assertEquals("234567890123456789", c1.substring(1, 19)); 233 assertEquals("bcdefghijklmno", c1.substring(21, 35)); 234 assertEquals("2345678901234567890abcdefghijklmno", c1.substring(1, 35)); 235 assertEquals("234567890123456789", c2.substring(1, 19)); 236 assertEquals("bcdefghijklmno", c2.substring(41, 55)); 237 assertEquals("2345678901234567890abcdefghijklmno", c2.substring(21, 55)); 238
