walt-compiler
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Alternative syntax for WebAssembly text format
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<title>Code coverage report for src/emitter/section/data.js</title>
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<a href="../../../index.html">All files</a> / <a href="index.html">src/emitter/section</a> data.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">// @flow
import { u8 } from 'wasm-types';
import { varint32, varuint32 } from '../numbers';
import opcode from '../opcode';
import OutputStream from '../../utils/output-stream';
import type { DataSectionType } from '../../generator/flow/types';
const emitDataSegment = (stream, segment) => {
stream.push(varuint32, 0, 'memory index');
const { offset, data } = segment;
stream.push(u8, opcode.i32Const.code, opcode.i32Const.text);
stream.push(varint32, offset, `segment offset (${offset})`);
stream.push(u8, opcode.End.code, 'end');
stream.push(varuint32, data.size, 'segment size');
// We invert the control here a bit so that any sort of data could be written
// into the data section. This buys us a bit of flexibility for the cost of
// doing encoding earlier in the funnel
stream.write(data);
};
export default function emit(dataSection: DataSectionType): OutputStream {
const stream = new OutputStream();
stream.push(varuint32, dataSection.length, 'entries');
for (let i = 0, len = dataSection.length; i < len; i++) {
const segment = dataSection[i];
emitDataSegment(stream, segment);
}
return stream;
}
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Code coverage
generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Sun Dec 23 2018 17:46:36 GMT+0000 (UTC)
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