108 lines
4.0 KiB
JavaScript
108 lines
4.0 KiB
JavaScript
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*
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* @format
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*/
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.parse = parse;
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var _HermesParserDeserializer = _interopRequireDefault(require("./HermesParserDeserializer"));
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var _HermesParserWASM = _interopRequireDefault(require("./HermesParserWASM"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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let HermesParserWASM;
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let hermesParse;
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let hermesParseResult_free;
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let hermesParseResult_getError;
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let hermesParseResult_getErrorLine;
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let hermesParseResult_getErrorColumn;
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let hermesParseResult_getProgramBuffer;
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let hermesParseResult_getPositionBuffer;
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let hermesParseResult_getPositionBufferSize;
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/**
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* Init the WASM wrapper code generated by `emscripten` to preparse the
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* HermesParser WASM code.
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*/
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function initHermesParserWASM() {
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if (HermesParserWASM != null) {
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return;
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}
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HermesParserWASM = (0, _HermesParserWASM.default)({
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/**
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* The emscripten version of `quit` unconditionally assigns the `status` to
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* `process.exitCode` which overrides any pre-existing code that has been
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* set, even if it is non zero. For our use case we never want an
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* `exitCode` to be set so this override removes that functionality.
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*/
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quit(_status, toThrow) {
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throw toThrow;
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}
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});
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hermesParse = HermesParserWASM.cwrap('hermesParse', 'number', ['number', 'number', 'number', 'number', 'number', 'number']);
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hermesParseResult_free = HermesParserWASM.cwrap('hermesParseResult_free', 'void', ['number']);
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hermesParseResult_getError = HermesParserWASM.cwrap('hermesParseResult_getError', 'string', ['number']);
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hermesParseResult_getErrorLine = HermesParserWASM.cwrap('hermesParseResult_getErrorLine', 'number', ['number']);
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hermesParseResult_getErrorColumn = HermesParserWASM.cwrap('hermesParseResult_getErrorColumn', 'number', ['number']);
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hermesParseResult_getProgramBuffer = HermesParserWASM.cwrap('hermesParseResult_getProgramBuffer', 'number', ['number']);
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hermesParseResult_getPositionBuffer = HermesParserWASM.cwrap('hermesParseResult_getPositionBuffer', 'number', ['number']);
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hermesParseResult_getPositionBufferSize = HermesParserWASM.cwrap('hermesParseResult_getPositionBufferSize', 'number', ['number']);
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} // Copy a string into the WASM heap and null-terminate
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function copyToHeap(buffer, addr) {
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HermesParserWASM.HEAP8.set(buffer, addr);
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HermesParserWASM.HEAP8[addr + buffer.length] = 0;
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}
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function parse(source, options) {
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initHermesParserWASM(); // Allocate space on heap for source text
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const sourceBuffer = Buffer.from(source, 'utf8');
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const sourceAddr = HermesParserWASM._malloc(sourceBuffer.length + 1);
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if (!sourceAddr) {
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throw new Error('Parser out of memory');
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}
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try {
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// Copy source text onto WASM heap
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copyToHeap(sourceBuffer, sourceAddr);
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const parseResult = hermesParse(sourceAddr, sourceBuffer.length + 1, options.flow === 'detect', options.enableExperimentalComponentSyntax, options.tokens, options.allowReturnOutsideFunction);
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try {
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// Extract and throw error from parse result if parsing failed
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const err = hermesParseResult_getError(parseResult);
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if (err) {
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const syntaxError = new SyntaxError(err); // $FlowExpectedError[prop-missing]
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syntaxError.loc = {
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line: hermesParseResult_getErrorLine(parseResult),
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column: hermesParseResult_getErrorColumn(parseResult)
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};
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throw syntaxError;
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}
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const deserializer = new _HermesParserDeserializer.default(hermesParseResult_getProgramBuffer(parseResult), hermesParseResult_getPositionBuffer(parseResult), hermesParseResult_getPositionBufferSize(parseResult), HermesParserWASM, options);
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return deserializer.deserialize();
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} finally {
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hermesParseResult_free(parseResult);
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}
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} finally {
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HermesParserWASM._free(sourceAddr);
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}
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}
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