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30 lines
794 B
JavaScript
30 lines
794 B
JavaScript
export default sliceChunks
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import assert from 'assert'
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function sliceChunks(chunks, token) {
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var startIndex = token.start._index
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var startBufferIndex = token.start._bufferIndex
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var endIndex = token.end._index
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var endBufferIndex = token.end._bufferIndex
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var view
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if (startIndex === endIndex) {
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assert(endBufferIndex > -1, 'expected non-negative end buffer index')
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assert(startBufferIndex > -1, 'expected non-negative start buffer index')
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view = [chunks[startIndex].slice(startBufferIndex, endBufferIndex)]
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} else {
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view = chunks.slice(startIndex, endIndex)
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if (startBufferIndex > -1) {
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view[0] = view[0].slice(startBufferIndex)
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}
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if (endBufferIndex > 0) {
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view.push(chunks[endIndex].slice(0, endBufferIndex))
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}
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}
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return view
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}
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