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Issue 5977006: Introduce NUMBER_IS_FINITE macro to avoid ToNumber() conversion. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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2362 * -Infinite the string representation "NaN", "Infinite" or "-Infinite" 2362 * -Infinite the string representation "NaN", "Infinite" or "-Infinite"
2363 * (not including the quotes) is returned. 2363 * (not including the quotes) is returned.
2364 * 2364 *
2365 * @param {number} value The number value to convert to a protocol value. 2365 * @param {number} value The number value to convert to a protocol value.
2366 * @returns {number|string} Protocol value. 2366 * @returns {number|string} Protocol value.
2367 */ 2367 */
2368 function NumberToJSON_(value) { 2368 function NumberToJSON_(value) {
2369 if (isNaN(value)) { 2369 if (isNaN(value)) {
2370 return 'NaN'; 2370 return 'NaN';
2371 } 2371 }
2372 if (!isFinite(value)) { 2372 if (!NUMBER_IS_FINITE(value)) {
2373 if (value > 0) { 2373 if (value > 0) {
2374 return 'Infinity'; 2374 return 'Infinity';
2375 } else { 2375 } else {
2376 return '-Infinity'; 2376 return '-Infinity';
2377 } 2377 }
2378 } 2378 }
2379 return value; 2379 return value;
2380 } 2380 }
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