/
encode.js
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/
encode.js
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"use strict";
module.exports = encode;
var Enum = require("./enum"),
Writer = require("./writer"),
types = require("./types"),
util = require("./util");
/**
* General purpose message encoder.
* @param {Message|Object} message Runtime message or plain object to encode
* @param {Writer} [writer] Writer to encode to
* @returns {Writer} writer
* @this Type
* @property {GenerateEncoder} generate Generates a type specific encoder
*/
function encode(message, writer) {
/* eslint-disable block-scoped-var, no-redeclare */
if (!writer)
writer = Writer.create();
var fields = this.getFieldsArray(), fi = 0;
while (fi < fields.length) {
var field = fields[fi++].resolve(),
type = field.resolvedType instanceof Enum ? "uint32" : field.type,
wireType = types.basic[type];
// Map fields
if (field.map) {
var keyType = field.resolvedKeyType /* only valid is enum */ ? "uint32" : field.keyType;
var value, keys;
if ((value = message[field.name]) && (keys = Object.keys(value)).length) {
writer.fork();
for (var i = 0; i < keys.length; ++i) {
writer.tag(1, types.mapKey[keyType])[keyType](keys[i]);
if (wireType !== undefined)
writer.tag(2, wireType)[type](value[keys[i]]);
else
field.resolvedType.encode(value[keys[i]], writer.tag(2,2).fork()).ldelim();
}
writer.ldelim(field.id);
}
// Repeated fields
} else if (field.repeated) {
var values = message[field.name];
if (values && values.length) {
// Packed repeated
if (field.packed && types.packed[type] !== undefined) {
writer.fork();
var i = 0;
while (i < values.length)
writer[type](values[i++]);
writer.ldelim(field.id);
// Non-packed
} else {
var i = 0;
if (wireType !== undefined)
while (i < values.length)
writer.tag(field.id, wireType)[type](values[i++]);
else
while (i < values.length)
field.resolvedType.encode(values[i++], writer.tag(field.id,2).fork()).ldelim();
}
}
// Non-repeated
} else {
var value = message[field.name];
if (
field.partOf && message[field.partOf.name] === field.name
||
(field.required || value !== undefined) && (field.long ? util.longNeq(value, field.defaultValue) : value !== field.defaultValue)
) {
if (wireType !== undefined)
writer.tag(field.id, wireType)[type](value);
else {
field.resolvedType.encode(value, writer.fork());
if (writer.len || field.required)
writer.ldelim(field.id);
else
writer.reset();
}
}
}
}
return writer;
/* eslint-enable block-scoped-var, no-redeclare */
}
/**
* Generates an {@link Encoder|encoder} specific to the specified message type.
* @typedef GenerateEncoder
* @type {function}
* @param {Type} mtype Message type
* @returns {Codegen} Codegen instance
*/
/**/
encode.generate = function generate(mtype) {
/* eslint-disable no-unexpected-multiline */
var fields = mtype.getFieldsArray();
var oneofs = mtype.getOneofsArray();
var gen = util.codegen("m", "w")
("w||(w=Writer.create())");
for (var i = 0; i < fields.length; ++i) {
var field = fields[i].resolve(),
type = field.resolvedType instanceof Enum ? "uint32" : field.type,
wireType = types.basic[type],
prop = util.safeProp(field.name);
// Map fields
if (field.map) {
var keyType = field.resolvedKeyType /* only valid is enum */ ? "uint32" : field.keyType,
keyWireType = types.mapKey[keyType];
gen
("if(m%s){", prop)
("w.fork()")
("for(var i=0,ks=Object.keys(m%s);i<ks.length;++i){", prop)
("w.tag(1,%d).%s(ks[i])", keyWireType, keyType);
if (wireType !== undefined) gen
("w.tag(2,%d).%s(m%s[ks[i]])", wireType, type, prop);
else gen
("types[%d].encode(m%s[ks[i]],w.tag(2,2).fork()).ldelim()", i, prop);
gen
("}")
("w.len&&w.ldelim(%d)||w.reset()", field.id)
("}");
// Repeated fields
} else if (field.repeated) {
// Packed repeated
if (field.packed && types.packed[type] !== undefined) { gen
("if(m%s&&m%s.length){", prop, prop)
("w.fork()")
("for(var i=0;i<m%s.length;++i)", prop)
("w.%s(m%s[i])", type, prop)
("w.ldelim(%d)", field.id)
("}");
// Non-packed
} else { gen
("if(m%s)", prop)
("for(var i=0;i<m%s.length;++i)", prop);
if (wireType !== undefined) gen
("w.tag(%d,%d).%s(m%s[i])", field.id, wireType, type, prop);
else gen
("types[%d].encode(m%s[i],w.tag(%d,2).fork()).ldelim()", i, prop, field.id);
}
// Non-repeated
} else if (!field.partOf) {
if (!field.required) {
if (field.long) gen
("if(m%s!==undefined&&util.longNeq(m%s,%j))", prop, prop, field.defaultValue);
else gen
("if(m%s!==undefined&&m%s!==%j)", prop, prop, field.defaultValue);
}
if (wireType !== undefined) gen
("w.tag(%d,%d).%s(m%s)", field.id, wireType, type, prop);
else if (field.required) gen
("types[%d].encode(m%s,w.tag(%d,2).fork()).ldelim()", i, prop, field.id);
else gen
("types[%d].encode(m%s,w.fork()).len&&w.ldelim(%d)||w.reset()", i, prop, field.id);
}
}
for (var i = 0; i < oneofs.length; ++i) { gen
var oneof = oneofs[i],
prop = util.safeProp(oneof.name);
gen
("switch(m%s){", prop);
var oneofFields = oneof.getFieldsArray();
for (var j = 0; j < oneofFields.length; ++j) {
var field = oneofFields[j],
type = field.resolvedType instanceof Enum ? "uint32" : field.type,
wireType = types.basic[type],
prop = util.safeProp(field.name);
gen
("case%j:", field.name);
if (wireType !== undefined) gen
("w.tag(%d,%d).%s(m%s)", field.id, wireType, type, prop);
else if (field.required) gen
("types[%d].encode(m%s,w.tag(%d,2).fork()).ldelim()", fields.indexOf(field), prop, field.id);
else gen
("types[%d].encode(m%s,w.fork()).len&&w.ldelim(%d)||w.reset()", fields.indexOf(field), prop, field.id);
gen
("break;");
} gen
("}");
}
return gen
("return w");
/* eslint-enable no-unexpected-multiline */
};