encoder.js
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"use strict";
module.exports = encoder;
var Enum = require("./enum"),
types = require("./types"),
util = require("./util");
/**
* Generates a partial message type encoder.
* @param {Codegen} gen Codegen instance
* @param {Field} field Reflected field
* @param {number} fieldIndex Field index
* @param {string} ref Variable reference
* @returns {Codegen} Codegen instance
* @ignore
*/
function genTypePartial(gen, field, fieldIndex, ref) {
return field.resolvedType.group
? gen("types[%i].encode(%s,w.uint32(%i)).uint32(%i)", fieldIndex, ref, (field.id << 3 | 3) >>> 0, (field.id << 3 | 4) >>> 0)
: gen("types[%i].encode(%s,w.uint32(%i).fork()).ldelim()", fieldIndex, ref, (field.id << 3 | 2) >>> 0);
}
/**
* Generates an encoder specific to the specified message type.
* @param {Type} mtype Message type
* @returns {Codegen} Codegen instance
*/
function encoder(mtype) {
/* eslint-disable no-unexpected-multiline, block-scoped-var, no-redeclare */
var gen = util.codegen(["m", "w"], mtype.name + "$encode")
("if(!w)")
("w=Writer.create()");
var i, ref;
// "when a message is serialized its known fields should be written sequentially by field number"
var fields = /* initializes */ mtype.fieldsArray.slice().sort(util.compareFieldsById);
for (var i = 0; i < fields.length; ++i) {
var field = fields[i].resolve(),
index = mtype._fieldsArray.indexOf(field),
type = field.resolvedType instanceof Enum ? "int32" : field.type,
wireType = types.basic[type];
ref = "m" + util.safeProp(field.name);
// Map fields
if (field.map) {
gen
("if(%s!=null&&m.hasOwnProperty(%j)){", ref, field.name) // !== undefined && !== null
("for(var ks=Object.keys(%s),i=0;i<ks.length;++i){", ref)
("w.uint32(%i).fork().uint32(%i).%s(ks[i])", (field.id << 3 | 2) >>> 0, 8 | types.mapKey[field.keyType], field.keyType);
if (wireType === undefined) gen
("types[%i].encode(%s[ks[i]],w.uint32(18).fork()).ldelim().ldelim()", index, ref); // can't be groups
else gen
(".uint32(%i).%s(%s[ks[i]]).ldelim()", 16 | wireType, type, ref);
gen
("}")
("}");
// Repeated fields
} else if (field.repeated) { gen
("if(%s!=null&&%s.length){", ref, ref); // !== undefined && !== null
// Packed repeated
if (field.packed && types.packed[type] !== undefined) { gen
("w.uint32(%i).fork()", (field.id << 3 | 2) >>> 0)
("for(var i=0;i<%s.length;++i)", ref)
("w.%s(%s[i])", type, ref)
("w.ldelim()");
// Non-packed
} else { gen
("for(var i=0;i<%s.length;++i)", ref);
if (wireType === undefined)
genTypePartial(gen, field, index, ref + "[i]");
else gen
("w.uint32(%i).%s(%s[i])", (field.id << 3 | wireType) >>> 0, type, ref);
} gen
("}");
// Non-repeated
} else {
if (field.optional) gen
("if(%s!=null&&m.hasOwnProperty(%j))", ref, field.name); // !== undefined && !== null
if (wireType === undefined)
genTypePartial(gen, field, index, ref);
else gen
("w.uint32(%i).%s(%s)", (field.id << 3 | wireType) >>> 0, type, ref);
}
}
return gen
("return w");
/* eslint-enable no-unexpected-multiline, block-scoped-var, no-redeclare */
}