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214 lines
7.8 KiB
214 lines
7.8 KiB
"use strict";
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// Copyright 2021-2024 Buf Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.fromBinary = fromBinary;
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exports.mergeFromBinary = mergeFromBinary;
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exports.readField = readField;
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const descriptors_js_1 = require("./descriptors.js");
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const scalar_js_1 = require("./reflect/scalar.js");
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const reflect_js_1 = require("./reflect/reflect.js");
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const binary_encoding_js_1 = require("./wire/binary-encoding.js");
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// Default options for parsing binary data.
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const readDefaults = {
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readUnknownFields: true,
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};
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function makeReadOptions(options) {
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return options ? Object.assign(Object.assign({}, readDefaults), options) : readDefaults;
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}
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/**
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* Parse serialized binary data.
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*/
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function fromBinary(schema, bytes, options) {
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const msg = (0, reflect_js_1.reflect)(schema, undefined, false);
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readMessage(msg, new binary_encoding_js_1.BinaryReader(bytes), makeReadOptions(options), false, bytes.byteLength);
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return msg.message;
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}
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/**
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* Parse from binary data, merging fields.
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*
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* Repeated fields are appended. Map entries are added, overwriting
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* existing keys.
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*
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* If a message field is already present, it will be merged with the
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* new data.
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*/
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function mergeFromBinary(schema, target, bytes, options) {
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readMessage((0, reflect_js_1.reflect)(schema, target, false), new binary_encoding_js_1.BinaryReader(bytes), makeReadOptions(options), false, bytes.byteLength);
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return target;
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}
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/**
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* If `delimited` is false, read the length given in `lengthOrDelimitedFieldNo`.
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*
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* If `delimited` is true, read until an EndGroup tag. `lengthOrDelimitedFieldNo`
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* is the expected field number.
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*
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* @private
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*/
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function readMessage(message, reader, options, delimited, lengthOrDelimitedFieldNo) {
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var _a;
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const end = delimited ? reader.len : reader.pos + lengthOrDelimitedFieldNo;
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let fieldNo, wireType;
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const unknownFields = (_a = message.getUnknown()) !== null && _a !== void 0 ? _a : [];
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while (reader.pos < end) {
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[fieldNo, wireType] = reader.tag();
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if (delimited && wireType == binary_encoding_js_1.WireType.EndGroup) {
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break;
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}
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const field = message.findNumber(fieldNo);
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if (!field) {
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const data = reader.skip(wireType, fieldNo);
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if (options.readUnknownFields) {
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unknownFields.push({ no: fieldNo, wireType, data });
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}
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continue;
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}
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readField(message, reader, field, wireType, options);
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}
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if (delimited) {
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if (wireType != binary_encoding_js_1.WireType.EndGroup || fieldNo !== lengthOrDelimitedFieldNo) {
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throw new Error(`invalid end group tag`);
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}
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}
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if (unknownFields.length > 0) {
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message.setUnknown(unknownFields);
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}
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}
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/**
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* @private
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*/
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function readField(message, reader, field, wireType, options) {
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switch (field.fieldKind) {
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case "scalar":
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message.set(field, readScalar(reader, field.scalar));
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break;
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case "enum":
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message.set(field, readScalar(reader, descriptors_js_1.ScalarType.INT32));
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break;
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case "message":
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message.set(field, readMessageField(reader, options, field, message.get(field)));
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break;
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case "list":
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readListField(reader, wireType, message.get(field), options);
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break;
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case "map":
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readMapEntry(reader, message.get(field), options);
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break;
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}
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}
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// Read a map field, expecting key field = 1, value field = 2
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function readMapEntry(reader, map, options) {
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const field = map.field();
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let key, val;
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const end = reader.pos + reader.uint32();
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while (reader.pos < end) {
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const [fieldNo] = reader.tag();
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switch (fieldNo) {
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case 1:
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key = readScalar(reader, field.mapKey);
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break;
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case 2:
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switch (field.mapKind) {
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case "scalar":
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val = readScalar(reader, field.scalar);
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break;
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case "enum":
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val = reader.int32();
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break;
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case "message":
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val = readMessageField(reader, options, field);
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break;
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}
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break;
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}
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}
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if (key === undefined) {
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key = (0, scalar_js_1.scalarZeroValue)(field.mapKey, false);
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}
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if (val === undefined) {
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switch (field.mapKind) {
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case "scalar":
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val = (0, scalar_js_1.scalarZeroValue)(field.scalar, false);
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break;
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case "enum":
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val = field.enum.values[0].number;
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break;
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case "message":
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val = (0, reflect_js_1.reflect)(field.message, undefined, false);
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break;
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}
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}
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map.set(key, val);
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}
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function readListField(reader, wireType, list, options) {
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var _a;
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const field = list.field();
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if (field.listKind === "message") {
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list.add(readMessageField(reader, options, field));
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return;
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}
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const scalarType = (_a = field.scalar) !== null && _a !== void 0 ? _a : descriptors_js_1.ScalarType.INT32;
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const packed = wireType == binary_encoding_js_1.WireType.LengthDelimited &&
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scalarType != descriptors_js_1.ScalarType.STRING &&
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scalarType != descriptors_js_1.ScalarType.BYTES;
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if (!packed) {
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list.add(readScalar(reader, scalarType));
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return;
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}
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const e = reader.uint32() + reader.pos;
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while (reader.pos < e) {
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list.add(readScalar(reader, scalarType));
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}
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}
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function readMessageField(reader, options, field, mergeMessage) {
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const delimited = field.delimitedEncoding;
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const message = mergeMessage !== null && mergeMessage !== void 0 ? mergeMessage : (0, reflect_js_1.reflect)(field.message, undefined, false);
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readMessage(message, reader, options, delimited, delimited ? field.number : reader.uint32());
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return message;
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}
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function readScalar(reader, type) {
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switch (type) {
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case descriptors_js_1.ScalarType.STRING:
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return reader.string();
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case descriptors_js_1.ScalarType.BOOL:
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return reader.bool();
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case descriptors_js_1.ScalarType.DOUBLE:
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return reader.double();
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case descriptors_js_1.ScalarType.FLOAT:
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return reader.float();
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case descriptors_js_1.ScalarType.INT32:
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return reader.int32();
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case descriptors_js_1.ScalarType.INT64:
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return reader.int64();
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case descriptors_js_1.ScalarType.UINT64:
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return reader.uint64();
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case descriptors_js_1.ScalarType.FIXED64:
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return reader.fixed64();
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case descriptors_js_1.ScalarType.BYTES:
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return reader.bytes();
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case descriptors_js_1.ScalarType.FIXED32:
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return reader.fixed32();
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case descriptors_js_1.ScalarType.SFIXED32:
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return reader.sfixed32();
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case descriptors_js_1.ScalarType.SFIXED64:
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return reader.sfixed64();
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case descriptors_js_1.ScalarType.SINT64:
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return reader.sint64();
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case descriptors_js_1.ScalarType.UINT32:
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return reader.uint32();
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case descriptors_js_1.ScalarType.SINT32:
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return reader.sint32();
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}
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}
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