diff options
Diffstat (limited to 'node_modules/@webassemblyjs/helper-buffer/lib/index.js')
-rw-r--r-- | node_modules/@webassemblyjs/helper-buffer/lib/index.js | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/helper-buffer/lib/index.js b/node_modules/@webassemblyjs/helper-buffer/lib/index.js new file mode 100644 index 0000000..b735b1f --- /dev/null +++ b/node_modules/@webassemblyjs/helper-buffer/lib/index.js @@ -0,0 +1,78 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.overrideBytesInBuffer = overrideBytesInBuffer; +exports.makeBuffer = makeBuffer; +exports.fromHexdump = fromHexdump; + +function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } } + +function concatUint8Arrays() { + for (var _len = arguments.length, arrays = new Array(_len), _key = 0; _key < _len; _key++) { + arrays[_key] = arguments[_key]; + } + + var totalLength = arrays.reduce(function (a, b) { + return a + b.length; + }, 0); + var result = new Uint8Array(totalLength); + var offset = 0; + + for (var _i = 0; _i < arrays.length; _i++) { + var arr = arrays[_i]; + + if (arr instanceof Uint8Array === false) { + throw new Error("arr must be of type Uint8Array"); + } + + result.set(arr, offset); + offset += arr.length; + } + + return result; +} + +function overrideBytesInBuffer(buffer, startLoc, endLoc, newBytes) { + var beforeBytes = buffer.slice(0, startLoc); + var afterBytes = buffer.slice(endLoc, buffer.length); // replacement is empty, we can omit it + + if (newBytes.length === 0) { + return concatUint8Arrays(beforeBytes, afterBytes); + } + + var replacement = Uint8Array.from(newBytes); + return concatUint8Arrays(beforeBytes, replacement, afterBytes); +} + +function makeBuffer() { + for (var _len2 = arguments.length, splitedBytes = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) { + splitedBytes[_key2] = arguments[_key2]; + } + + var bytes = [].concat.apply([], splitedBytes); + return new Uint8Array(bytes).buffer; +} + +function fromHexdump(str) { + var lines = str.split("\n"); // remove any leading left whitespace + + lines = lines.map(function (line) { + return line.trim(); + }); + var bytes = lines.reduce(function (acc, line) { + var cols = line.split(" "); // remove the offset, left column + + cols.shift(); + cols = cols.filter(function (x) { + return x !== ""; + }); + var bytes = cols.map(function (x) { + return parseInt(x, 16); + }); + acc.push.apply(acc, _toConsumableArray(bytes)); + return acc; + }, []); + return Buffer.from(bytes); +}
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