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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/@webassemblyjs/wast-parser/lib/number-literals.js | |
download | website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.gz website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.bz2 website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.zip |
api, login, auth
Diffstat (limited to 'node_modules/@webassemblyjs/wast-parser/lib/number-literals.js')
-rw-r--r-- | node_modules/@webassemblyjs/wast-parser/lib/number-literals.js | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/wast-parser/lib/number-literals.js b/node_modules/@webassemblyjs/wast-parser/lib/number-literals.js new file mode 100644 index 0000000..fea08f9 --- /dev/null +++ b/node_modules/@webassemblyjs/wast-parser/lib/number-literals.js @@ -0,0 +1,116 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.parse32F = parse32F; +exports.parse64F = parse64F; +exports.parse32I = parse32I; +exports.parseU32 = parseU32; +exports.parse64I = parse64I; +exports.isInfLiteral = isInfLiteral; +exports.isNanLiteral = isNanLiteral; + +var _long = _interopRequireDefault(require("@xtuc/long")); + +var _floatingPointHexParser = _interopRequireDefault(require("@webassemblyjs/floating-point-hex-parser")); + +var _helperApiError = require("@webassemblyjs/helper-api-error"); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +function parse32F(sourceString) { + if (isHexLiteral(sourceString)) { + return (0, _floatingPointHexParser.default)(sourceString); + } + + if (isInfLiteral(sourceString)) { + return sourceString[0] === "-" ? -1 : 1; + } + + if (isNanLiteral(sourceString)) { + return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x400000); + } + + return parseFloat(sourceString); +} + +function parse64F(sourceString) { + if (isHexLiteral(sourceString)) { + return (0, _floatingPointHexParser.default)(sourceString); + } + + if (isInfLiteral(sourceString)) { + return sourceString[0] === "-" ? -1 : 1; + } + + if (isNanLiteral(sourceString)) { + return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x8000000000000); + } + + if (isHexLiteral(sourceString)) { + return (0, _floatingPointHexParser.default)(sourceString); + } + + return parseFloat(sourceString); +} + +function parse32I(sourceString) { + var value = 0; + + if (isHexLiteral(sourceString)) { + value = ~~parseInt(sourceString, 16); + } else if (isDecimalExponentLiteral(sourceString)) { + throw new Error("This number literal format is yet to be implemented."); + } else { + value = parseInt(sourceString, 10); + } + + return value; +} + +function parseU32(sourceString) { + var value = parse32I(sourceString); + + if (value < 0) { + throw new _helperApiError.CompileError("Illegal value for u32: " + sourceString); + } + + return value; +} + +function parse64I(sourceString) { + var long; + + if (isHexLiteral(sourceString)) { + long = _long.default.fromString(sourceString, false, 16); + } else if (isDecimalExponentLiteral(sourceString)) { + throw new Error("This number literal format is yet to be implemented."); + } else { + long = _long.default.fromString(sourceString); + } + + return { + high: long.high, + low: long.low + }; +} + +var NAN_WORD = /^\+?-?nan/; +var INF_WORD = /^\+?-?inf/; + +function isInfLiteral(sourceString) { + return INF_WORD.test(sourceString.toLowerCase()); +} + +function isNanLiteral(sourceString) { + return NAN_WORD.test(sourceString.toLowerCase()); +} + +function isDecimalExponentLiteral(sourceString) { + return !isHexLiteral(sourceString) && sourceString.toUpperCase().includes("E"); +} + +function isHexLiteral(sourceString) { + return sourceString.substring(0, 2).toUpperCase() === "0X" || sourceString.substring(0, 3).toUpperCase() === "-0X"; +}
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