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      1 // Copyright 2008 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 function ToUInt32(x) {
     29   return x >>> 0;
     30 }
     31 
     32 assertEquals(0, ToUInt32(0),         "0");
     33 assertEquals(0, ToUInt32(-0),        "-0");
     34 assertEquals(0, ToUInt32(Infinity),  "Infinity");
     35 assertEquals(0, ToUInt32(-Infinity), "-Infinity");
     36 assertEquals(0, ToUInt32(NaN),       "NaN");
     37 
     38 assertEquals(0, ToUInt32(Number.MIN_VALUE),  "MIN");
     39 assertEquals(0, ToUInt32(-Number.MIN_VALUE), "-MIN");
     40 assertEquals(0, ToUInt32(0.1),               "0.1");
     41 assertEquals(0, ToUInt32(-0.1),              "-0.1");
     42 assertEquals(1, ToUInt32(1),                 "1");
     43 assertEquals(1, ToUInt32(1.1),               "1.1");
     44 
     45 assertEquals(4294967295, ToUInt32(-1),   "-1");
     46 assertEquals(4294967295, ToUInt32(-1.1), "-1.1");
     47 
     48 assertEquals(2147483647, ToUInt32(2147483647), "2147483647");
     49 assertEquals(2147483648, ToUInt32(2147483648), "2147483648");
     50 assertEquals(2147483649, ToUInt32(2147483649), "2147483649");
     51 
     52 assertEquals(4294967295, ToUInt32(4294967295), "4294967295");
     53 assertEquals(0,          ToUInt32(4294967296), "4294967296");
     54 assertEquals(1,          ToUInt32(4294967297), "4294967297");
     55 
     56 assertEquals(2147483649, ToUInt32(-2147483647), "-2147483647");
     57 assertEquals(2147483648, ToUInt32(-2147483648), "-2147483648");
     58 assertEquals(2147483647, ToUInt32(-2147483649), "-2147483649");
     59 
     60 assertEquals(1,          ToUInt32(-4294967295), "-4294967295");
     61 assertEquals(0,          ToUInt32(-4294967296), "-4294967296");
     62 assertEquals(4294967295, ToUInt32(-4294967297), "-4294967297");
     63 
     64 assertEquals(2147483647, ToUInt32('2147483647'), "'2147483647'");
     65 assertEquals(2147483648, ToUInt32('2147483648'), "'2147483648'");
     66 assertEquals(2147483649, ToUInt32('2147483649'), "'2147483649'");
     67 
     68 assertEquals(4294967295, ToUInt32('4294967295'), "'4294967295'");
     69 assertEquals(0,          ToUInt32('4294967296'), "'4294967296'");
     70 assertEquals(1,          ToUInt32('4294967297'), "'4294967297'");
     71