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weak links decoding proposal

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Bartosz Sypytkowski 2023-10-26 10:34:30 +09:00
parent a01113812c
commit 15279e430c
1 changed files with 17 additions and 0 deletions
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17
src/types/YWeakLink.js
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@ -208,6 +208,23 @@ export class YWeakLink extends AbstractType {
_write (encoder) {
encoder.writeTypeRef(YWeakLinkRefID)
const isSingle = this.isSingle
/**
* Info flag bits:
* - 0: is quote spanning over single element?
* If this bit is set, we skip writing ID of quotation end.
* - 1: is quotation start inclusive
* - 2: is quotation end exclusive
*
* Future proposition for bits usage:
* - 3: is quotation start unbounded.
* - 4: is quotation end unbounded
* - 5: if quotation is unbounded on both ends, this bit says if quoted collection is root type.
* The next ID/String is a quoted collection ID or name.
* - 6: this quotation links to a subdocument.
* If set, the last segment of data contains info that may be needed to restore subdoc data.
* - 7: left unused. Potentially useful as a varint continuation flag if we need to expand this
* flag in the future.
*/
const info = (isSingle ? 0 : 1) | (this._quoteStart.assoc >= 0 ? 2 : 0) | (this._quoteEnd.assoc >= 0 ? 4 : 0)
encoding.writeUint8(encoder.restEncoder, info)
writeID(encoder.restEncoder, /** @type {ID} */ (this._quoteStart.item))