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import { throwUOE } from "./ExUtil.js";
import { ArrayUtil } from "./ArrayUtil.js";
import { Buffer } from "./Buffer.js";
import { OptionalFormat } from "./OptionalFormat.js";
import { Encoding_1_0, Protocol } from "./Protocol.js";
import { SlicedData, SliceInfo, UnknownSlicedValue } from "./UnknownSlicedValue.js";
import { Value } from "./Value.js";
import { InitializationException, MarshalException } from "./LocalExceptions.js";
import { Ice as Ice_Identity } from "./Identity.js";
const { Identity } = Ice_Identity;
import { Ice as Ice_Version } from "./Version.js";
const { EncodingVersion } = Ice_Version;
import { Instance } from "./Instance.js";
import { Communicator } from "./Communicator.js";
import { ObjectPrx } from "./ObjectPrx.js";
import { SliceType } from "./SliceType.js";
const endOfBufferMessage = "Attempting to unmarshal past the end of the buffer.";
const slicingIds = new Map();
function traceSlicing(kind, typeId, slicingCat, logger) {
if (!slicingIds.has(typeId)) {
logger.trace(slicingCat, `unknown ${kind} type \`${typeId}'`);
slicingIds.set(typeId, 1);
}
}
class IndirectPatchEntry {
constructor(index, cb) {
this.index = index;
this.cb = cb;
}
}
class EncapsDecoder {
constructor(stream, encaps, classGraphDepth) {
this._stream = stream;
this._encaps = encaps;
this._classGraphDepthMax = classGraphDepth;
this._classGraphDepth = 0;
this._patchMap = null; // Lazy initialized, Map<int, Patcher[] >()
this._unmarshaledMap = new Map(); // Map<int, Value>()
this._typeIdMap = null; // Lazy initialized, Map<int, String>
this._typeIdIndex = 0;
this._valueList = null; // Lazy initialized. Value[]
}
readOptional() {
return false;
}
readPendingValues() {}
readTypeId(isIndex) {
if (this._typeIdMap === null) {
// Lazy initialization
this._typeIdMap = new Map(); // Map<int, String>();
}
let typeId;
if (isIndex) {
typeId = this._typeIdMap.get(this._stream.readSize());
if (typeId === undefined) {
throw new MarshalException(endOfBufferMessage);
}
} else {
typeId = this._stream.readString();
this._typeIdMap.set(++this._typeIdIndex, typeId);
}
return typeId;
}
newInstance(typeId) {
return this._stream.instance._initData.sliceLoader.newInstance(typeId);
}
addPatchEntry(index, cb) {
console.assert(index > 0);
//
// Check if we have already unmarshaled the instance. If that's the case,
// just call the callback and we're done.
//
const obj = this._unmarshaledMap.get(index);
if (obj !== undefined && obj !== null) {
cb(obj);
return;
}
if (this._patchMap === null) {
// Lazy initialization
this._patchMap = new Map(); // Map<Integer, Patcher[] >();
}
//
// Add a patch entry if the instance isn't unmarshaled yet,
// the callback will be called when the instance is
// unmarshaled.
//
let l = this._patchMap.get(index);
if (l === undefined) {
//
// We have no outstanding instances to be patched for this
// index, so make a new entry in the patch map.
//
l = []; // ReadValueCallback[]
this._patchMap.set(index, l);
}
//
// Append a patch entry for this instance.
//
l.push(new PatchEntry(cb, this._classGraphDepth));
}
unmarshal(index, v) {
//
// Add the instance to the map of unmarshaled instances, this must
// be done before reading the instances (for circular references).
//
this._unmarshaledMap.set(index, v);
//
// Read the instance.
//
v._iceRead(this._stream);
if (this._patchMap !== null) {
//
// Patch all instances now that the instance is unmarshaled.
//
const l = this._patchMap.get(index);
if (l !== undefined) {
console.assert(l.length > 0);
//
// Patch all pointers that refer to the instance.
//
for (let i = 0; i < l.length; ++i) {
l[i].cb(v);
}
//
// Clear out the patch map for that index -- there is nothing left
// to patch for that index for the time being.
//
this._patchMap.delete(index);
}
}
if ((this._patchMap === null || this._patchMap.size === 0) && this._valueList === null) {
v.ice_postUnmarshal();
} else {
if (this._valueList === null) {
// Lazy initialization
this._valueList = []; // Value[]
}
this._valueList.push(v);
if (this._patchMap === null || this._patchMap.size === 0) {
//
// Iterate over the instance list and invoke ice_postUnmarshal on
// each instance. We must do this after all instances have been
// unmarshaled in order to ensure that any instance data members
// have been properly patched.
//
for (let i = 0; i < this._valueList.length; i++) {
this._valueList[i].ice_postUnmarshal();
}
this._valueList = [];
}
}
}
}
class EncapsDecoder10 extends EncapsDecoder {
constructor(stream, encaps, classGraphDepth, f) {
super(stream, encaps, classGraphDepth, f);
this._sliceType = SliceType.NoSlice;
}
readValue(cb) {
//
// Instance references are encoded as a negative integer in 1.0.
//
let index = this._stream.readInt();
if (index > 0) {
throw new MarshalException("invalid object id");
}
index = -index;
if (index === 0) {
cb(null);
} else {
this.addPatchEntry(index, cb);
}
}
throwException() {
console.assert(this._sliceType === SliceType.NoSlice);
//
// User exceptions with the 1.0 encoding start with a boolean flag
// that indicates whether or not the exception has classes.
//
// This allows reading the pending instances even if some part of
// the exception was sliced.
//
const usesClasses = this._stream.readBool();
this._sliceType = SliceType.ExceptionSlice;
this._skipFirstSlice = false;
//
// Read the first slice header.
//
this.startSlice();
const mostDerivedId = this._typeId;
while (true) {
const userEx = this._stream.instance._initData.sliceLoader.newInstance(this._typeId);
//
// We found the exception.
//
if (userEx !== null) {
userEx._read(this._stream);
if (usesClasses) {
this.readPendingValues();
}
throw userEx;
// Never reached.
}
//
// Slice off what we don't understand.
//
this.skipSlice();
try {
this.startSlice();
} catch (ex) {
//
// An oversight in the 1.0 encoding means there is no marker to indicate
// the last slice of an exception. As a result, we just try to read the
// next type ID, which raises MarshalException when the input buffer underflow.
if (ex instanceof MarshalException) {
throw new MarshalException(`unknown exception type '${mostDerivedId}'`);
}
throw ex;
}
}
}
startInstance(sliceType) {
console.assert(this._sliceType === sliceType);
this._skipFirstSlice = true;
}
endInstance() {
//
// Read the Ice::Object slice.
//
if (this._sliceType === SliceType.ValueSlice) {
this.startSlice();
const sz = this._stream.readSize(); // For compatibility with the old AFM.
if (sz !== 0) {
throw new MarshalException("invalid Object slice");
}
this.endSlice();
}
this._sliceType = SliceType.NoSlice;
return null;
}
startSlice() {
//
// If first slice, don't read the header, it was already read in
// readInstance or throwException to find the factory.
//
if (this._skipFirstSlice) {
this._skipFirstSlice = false;
return;
}
//
// For instances, first read the type ID boolean which indicates
// whether or not the type ID is encoded as a string or as an
// index. For exceptions, the type ID is always encoded as a
// string.
//
if (this._sliceType === SliceType.ValueSlice) {
// For exceptions, the type ID is always encoded as a string
const isIndex = this._stream.readBool();
this._typeId = this.readTypeId(isIndex);
} else {
this._typeId = this._stream.readString();
}
this._sliceSize = this._stream.readInt();
if (this._sliceSize < 4) {
throw new MarshalException(endOfBufferMessage);
}
}
endSlice() {}
skipSlice() {
this._stream.traceSkipSlice(this._typeId, this._sliceType);
console.assert(this._sliceSize >= 4);
this._stream.skip(this._sliceSize - 4);
}
readPendingValues() {
let num;
do {
num = this._stream.readSize();
for (let k = num; k > 0; --k) {
this.readInstance();
}
} while (num > 0);
if (this._patchMap !== null && this._patchMap.size !== 0) {
//
// If any entries remain in the patch map, the sender has sent an index for an instance, but failed
// to supply the instance.
//
throw new MarshalException("index for class received, but no instance");
}
}
readInstance() {
const index = this._stream.readInt();
let v = null;
if (index <= 0) {
throw new MarshalException("invalid object id");
}
this._sliceType = SliceType.ValueSlice;
this._skipFirstSlice = false;
//
// Read the first slice header.
//
this.startSlice();
const mostDerivedId = this._typeId;
while (true) {
//
// For the 1.0 encoding, the type ID for the base Object class
// marks the last slice.
//
if (this._typeId == Value.ice_staticId()) {
throw new MarshalException(`The Slice loader cannot find a class for type ID '${mostDerivedId}'.`);
}
v = this.newInstance(this._typeId);
//
// We found a factory, we get out of this loop.
//
if (v) {
break;
}
//
// Slice off what we don't understand.
//
this.skipSlice();
this.startSlice(); // Read next Slice header for next iteration.
}
//
// Compute the biggest class graph depth of this object. To compute this,
// we get the class graph depth of each ancestor from the patch map and
// keep the biggest one.
//
this._classGraphDepth = 0;
const l = this._patchMap === null ? null : this._patchMap.get(index);
if (l !== undefined) {
console.assert(l.length > 0);
for (const entry of l) {
if (entry.classGraphDepth > this._classGraphDepth) {
this._classGraphDepth = entry.classGraphDepth;
}
}
}
if (++this._classGraphDepth > this._classGraphDepthMax) {
throw new MarshalException("maximum class graph depth reached");
}
//
// Unmarshal the instance and add it to the map of unmarshaled instances.
//
this.unmarshal(index, v);
}
}
class EncapsDecoder11 extends EncapsDecoder {
constructor(stream, encaps, classGraphDepth, f) {
super(stream, encaps, classGraphDepth, f);
this._current = null;
this._valueIdIndex = 1;
}
readValue(cb) {
const index = this._stream.readSize();
if (index < 0) {
throw new MarshalException("invalid object id");
} else if (index === 0) {
cb(null);
} else if (this._current !== null && (this._current.sliceFlags & Protocol.FLAG_HAS_INDIRECTION_TABLE) !== 0) {
//
// When reading an instance within a slice and there's an
// indirect instance table, always read an indirect reference
// that points to an instance from the indirect instance table
// marshaled at the end of the Slice.
//
// Maintain a list of indirect references. Note that the
// indirect index starts at 1, so we decrement it by one to
// derive an index into the indirection table that we'll read
// at the end of the slice.
//
if (this._current.indirectPatchList === null) {
// Lazy initialization
this._current.indirectPatchList = []; // IndirectPatchEntry[]
}
this._current.indirectPatchList.push(new IndirectPatchEntry(index - 1, cb));
} else {
this.readInstance(index, cb);
}
}
throwException() {
console.assert(this._current === null);
this.push(SliceType.ExceptionSlice);
//
// Read the first slice header.
//
this.startSlice();
const mostDerivedId = this._current.typeId;
while (true) {
const userEx = this._stream.instance._initData.sliceLoader.newInstance(this._current.typeId);
//
// We found the exception.
//
if (userEx !== null) {
userEx._read(this._stream);
throw userEx;
// Never reached.
}
//
// Slice off what we don't understand.
//
this.skipSlice();
if ((this._current.sliceFlags & Protocol.FLAG_IS_LAST_SLICE) !== 0) {
throw new MarshalException(`cannot unmarshal user exception with type ID '${mostDerivedId}'`);
}
this.startSlice();
}
}
startInstance(sliceType) {
console.assert(sliceType !== undefined);
console.assert(this._current.sliceType !== null && this._current.sliceType === sliceType);
this._current.skipFirstSlice = true;
}
endInstance() {
let slicedData = this.readSlicedData();
if (this._current.slices !== null) {
this._current.slices.length = 0; // Clear the array.
this._current.indirectionTables.length = 0; // Clear the array.
}
this._current = this._current.previous;
return slicedData;
}
startSlice() {
//
// If first slice, don't read the header, it was already read in
// readInstance or throwException to find the factory.
//
if (this._current.skipFirstSlice) {
this._current.skipFirstSlice = false;
return;
}
this._current.sliceFlags = this._stream.readByte();
//
// Read the type ID, for instance slices the type ID is encoded as a
// string or as an index, for exceptions it's always encoded as a
// string.
//
if (this._current.sliceType === SliceType.ValueSlice) {
if ((this._current.sliceFlags & Protocol.FLAG_HAS_TYPE_ID_COMPACT) === Protocol.FLAG_HAS_TYPE_ID_COMPACT) {
// Must be checked 1st!
this._current.compactId = this._stream.readSize();
this._current.typeId = this._current.compactId.toString();
} else if (
(this._current.sliceFlags & (Protocol.FLAG_HAS_TYPE_ID_INDEX | Protocol.FLAG_HAS_TYPE_ID_STRING)) !==
0
) {
this._current.typeId = this.readTypeId(
(this._current.sliceFlags & Protocol.FLAG_HAS_TYPE_ID_INDEX) !== 0,
);
this._current.compactId = -1;
} else {
//
// Only the most derived slice encodes the type ID for the compact format.
//
this._current.typeId = "";
this._current.compactId = -1;
}
} else {
this._current.typeId = this._stream.readString();
this._current.compactId = -1;
}
//
// Read the slice size if necessary.
//
if ((this._current.sliceFlags & Protocol.FLAG_HAS_SLICE_SIZE) !== 0) {
this._current.sliceSize = this._stream.readInt();
if (this._current.sliceSize < 4) {
throw new MarshalException(endOfBufferMessage);
}
} else {
this._current.sliceSize = 0;
}
}
endSlice() {
if ((this._current.sliceFlags & Protocol.FLAG_HAS_OPTIONAL_MEMBERS) !== 0) {
this._stream.skipOptionals();
}
//
// Read the indirection table if one is present and transform the
// indirect patch list into patch entries with direct references.
//
if ((this._current.sliceFlags & Protocol.FLAG_HAS_INDIRECTION_TABLE) !== 0) {
const indirectionTable = [];
//
// The table is written as a sequence<size> to conserve space.
//
const length = this._stream.readAndCheckSeqSize(1);
for (let i = 0; i < length; ++i) {
indirectionTable[i] = this.readInstance(this._stream.readSize(), null);
}
//
// Sanity checks. If there are optional members, it's possible
// that not all instance references were read if they are from
// unknown optional data members.
//
if (indirectionTable.length === 0) {
throw new MarshalException("empty indirection table");
}
if (
(this._current.indirectPatchList === null || this._current.indirectPatchList.length === 0) &&
(this._current.sliceFlags & Protocol.FLAG_HAS_OPTIONAL_MEMBERS) === 0
) {
throw new MarshalException("no references to indirection table");
}
//
// Convert indirect references into direct references.
//
if (this._current.indirectPatchList !== null) {
this._current.indirectPatchList.forEach(e => {
console.assert(e.index >= 0);
if (e.index >= indirectionTable.length) {
throw new MarshalException("indirection out of range");
}
this.addPatchEntry(indirectionTable[e.index], e.cb);
});
this._current.indirectPatchList.length = 0;
}
}
}
skipSlice() {
this._stream.traceSkipSlice(this._current.typeId, this._current.sliceType);
const start = this._stream.pos;
if ((this._current.sliceFlags & Protocol.FLAG_HAS_SLICE_SIZE) !== 0) {
console.assert(this._current.sliceSize >= 4);
this._stream.skip(this._current.sliceSize - 4);
} else {
if (this._current.sliceType == SliceType.ValueSlice) {
throw new MarshalException(
`The Slice loader cannot find a class for type ID '${this._current.typeId}' and compact format prevents slicing.`,
);
} else {
throw new MarshalException(
`The Slice loader cannot find a user exception class for type ID '${this._current.typeId}' and compact format prevents slicing.`,
);
}
}
//
// Preserve this slice.
//
const info = new SliceInfo();
info.typeId = this._current.typeId;
info.compactId = this._current.compactId;
info.hasOptionalMembers = (this._current.sliceFlags & Protocol.FLAG_HAS_OPTIONAL_MEMBERS) !== 0;
info.isLastSlice = (this._current.sliceFlags & Protocol.FLAG_IS_LAST_SLICE) !== 0;
const b = this._stream._buf;
const end = b.position;
let dataEnd = end;
if (info.hasOptionalMembers) {
//
// Don't include the optional member end marker. It will be re-written by
// endSlice when the sliced data is re-written.
//
--dataEnd;
}
b.position = start;
info.bytes = b.getArray(dataEnd - start);
b.position = end;
if (this._current.slices === null) {
// Lazy initialization
this._current.slices = []; // Ice.SliceInfo[]
this._current.indirectionTables = []; // int[]
}
//
// Read the indirect instance table. We read the instances or their
// IDs if the instance is a reference to an already unmarshaled
// instance.
//
if ((this._current.sliceFlags & Protocol.FLAG_HAS_INDIRECTION_TABLE) !== 0) {
const length = this._stream.readAndCheckSeqSize(1);
const indirectionTable = [];
for (let i = 0; i < length; ++i) {
indirectionTable[i] = this.readInstance(this._stream.readSize(), null);
}
this._current.indirectionTables.push(indirectionTable);
} else {
this._current.indirectionTables.push(null);
}
this._current.slices.push(info);
}
readOptional(readTag, expectedFormat) {
if (this._current === null) {
return this._stream.readOptImpl(readTag, expectedFormat);
} else if ((this._current.sliceFlags & Protocol.FLAG_HAS_OPTIONAL_MEMBERS) !== 0) {
return this._stream.readOptImpl(readTag, expectedFormat);
}
return false;
}
readInstance(index, cb) {
console.assert(index > 0);
let v = null;
if (index > 1) {
if (cb !== null) {
this.addPatchEntry(index, cb);
}
return index;
}
this.push(SliceType.ValueSlice);
//
// Get the instance ID before we start reading slices. If some
// slices are skipped, the indirect instance table is still read and
// might read other instances.
//
index = ++this._valueIdIndex;
//
// Read the first slice header.
//
this.startSlice();
const mostDerivedId = this._current.typeId;
while (true) {
if (this._current.typeId.length > 0) {
v = this.newInstance(this._current.typeId);
}
if (v !== null && v !== undefined) {
//
// We have an instance, we get out of this loop.
//
break;
}
//
// Slice off what we don't understand.
//
this.skipSlice();
//
// If this is the last slice, keep the instance as an opaque
// UnknownSlicedValue object.
//
if ((this._current.sliceFlags & Protocol.FLAG_IS_LAST_SLICE) !== 0) {
v = new UnknownSlicedValue(mostDerivedId);
break;
}
this.startSlice(); // Read next Slice header for next iteration.
}
if (++this._classGraphDepth > this._classGraphDepthMax) {
throw new MarshalException("maximum class graph depth reached");
}
//
// Unmarshal the instance.
//
this.unmarshal(index, v);
--this._classGraphDepth;
if (this._current === null && this._patchMap !== null && this._patchMap.size !== 0) {
//
// If any entries remain in the patch map, the sender has sent an index for an instance, but failed
// to supply the instance.
//
throw new MarshalException("index for class received, but no instance");
}
if (cb !== null) {
cb(v);
}
return index;
}
readSlicedData() {
if (this._current.slices === null) {
// No preserved slices.
return null;
}
//
// The _indirectionTables member holds the indirection table for each slice
// in _slices.
//
console.assert(this._current.slices.length === this._current.indirectionTables.length);
for (let i = 0; i < this._current.slices.length; ++i) {
//
// We use the "instances" list in SliceInfo to hold references
// to the target instances. Note that the instances might not have
// been read yet in the case of a circular reference to an
// enclosing instance.
//
const table = this._current.indirectionTables[i];
const info = this._current.slices[i];
info.instances = [];
if (table) {
for (let j = 0; j < table.length; ++j) {
this.addPatchEntry(table[j], sequencePatcher(info.instances, j, Value));
}
}
}
return new SlicedData(ArrayUtil.clone(this._current.slices));
}
push(sliceType) {
if (this._current === null) {
this._current = new EncapsDecoder11.InstanceData(null);
} else {
this._current = !this._current.next ? new EncapsDecoder11.InstanceData(this._current) : this._current.next;
}
this._current.sliceType = sliceType;
this._current.skipFirstSlice = false;
}
}
EncapsDecoder11.InstanceData = class {
constructor(previous) {
if (previous !== null) {
previous.next = this;
}
this.previous = previous;
this.next = null;
// Instance attributes
this.sliceType = null;
this.skipFirstSlice = false;
this.slices = null; // Preserved slices. Ice.SliceInfo[]
this.indirectionTables = null; // int[][]
// Slice attributes
this.sliceFlags = 0;
this.sliceSize = 0;
this.typeId = null;
this.compactId = -1;
this.indirectPatchList = null; // Lazy initialized, IndirectPatchEntry[]
}
};
const sequencePatcher = function (seq, index, T) {
return v => {
if (v !== null && !(v instanceof T)) {
throwUOE(T.ice_staticId(), v);
}
seq[index] = v;
};
};
class ReadEncaps {
constructor() {
this.start = 0;
this.sz = 0;
this.encoding = null;
this.encoding_1_0 = false;
this.decoder = null;
this.next = null;
}
reset() {
this.decoder = null;
}
setEncoding(encoding) {
this.encoding = encoding;
this.encoding_1_0 = encoding.equals(Encoding_1_0);
}
}
class PatchEntry {
constructor(cb, classGraphDepth) {
this._cb = cb;
this._classGraphDepth = classGraphDepth;
}
get cb() {
return this._cb;
}
get classGraphDepth() {
return this._classGraphDepth;
}
}
export class InputStream {
constructor(arg1, arg2, arg3) {
// The first argument must be a Communicator or an Instance.
if (arg1 === null || arg1 === undefined) {
throw new InitializationException("missing argument(s) for InputStream constructor");
}
if (arg1.constructor === Instance) {
// (instance, encoding) or (instance, encoding, buffer)
this._instance = arg1;
if (arg2 === null || arg2 === undefined || arg2.constructor !== EncodingVersion) {
throw new InitializationException(
"expected the encoding version as the second argument to the InputStream constructor",
);
}
this._encoding = arg2;
if (arg3 === undefined || arg3 === null) {
this._buf = new Buffer();
} else if (arg3.constructor === Buffer) {
this._buf = arg3;
} else {
throw new InitializationException("unknown third argument to InputStream constructor");
}
} else if (arg1.constructor === Communicator) {
// (communicator, encoding, buffer) or (communicator, buffer), with two flavors for buffer
this._instance = arg1.instance;
[arg2, arg3].forEach(arg => {
if (arg !== null && arg !== undefined) {
if (arg.constructor === EncodingVersion) {
if (this._encoding !== undefined) {
throw new InitializationException(
"expected buffer as the third argument to InputStream constructor",
);
}
this._encoding = arg;
} else if (arg.constructor === ArrayBuffer) {
if (this._buf !== undefined) {
throw new InitializationException("duplicate buffer argument to InputStream constructor");
}
this._buf = new Buffer(arg.bytes);
} else if (arg.constructor === Uint8Array) {
if (this._buf !== undefined) {
throw new InitializationException("duplicate buffer argument to InputStream constructor");
}
this._buf = new Buffer(arg.buffer);
} else {
throw new InitializationException("unknown argument to InputStream constructor");
}
}
});
if (this._buf === undefined) {
throw new InitializationException("missing buffer argument to InputStream constructor");
}
this._encoding ??= this._instance.defaultsAndOverrides().defaultEncoding;
} else {
throw new InitializationException("unknown first argument to InputStream constructor");
}
this._encapsStack = null;
this._encapsCache = null;
this._closure = null;
this._startSeq = -1;
this._sizePos = -1;
this._classGraphDepthMax = this._instance.classGraphDepthMax();
}
clear() {
if (this._encapsStack !== null) {
console.assert(this._encapsStack.next === null);
this._encapsStack.next = this._encapsCache;
this._encapsCache = this._encapsStack;
this._encapsCache.reset();
this._encapsStack = null;
}
this._startSeq = -1;
}
swap(other) {
console.assert(this._instance === other._instance);
// These are cached values derived from instance.
console.assert(this._classGraphDepthMax === other._classGraphDepthMax);
[other._buf, this._buf] = [this._buf, other._buf];
[other._encoding, this._encoding] = [this._encoding, other._encoding];
[other._startSeq, this._startSeq] = [this._startSeq, other._startSeq];
[other._minSeqSize, this._minSeqSize] = [this._minSeqSize, other._minSeqSize];
[other._sizePos, this._sizePos] = [this._sizePos, other._sizePos];
// Swap is never called for InputStreams that have encapsulations being read/write. However,
// encapsulations might still be set in case marshaling or unmarshaling failed. We just
// reset the encapsulations if there are still some set.
this.resetEncapsulation();
other.resetEncapsulation();
}
resetEncapsulation() {
this._encapsStack = null;
}
resize(sz) {
this._buf.resize(sz);
this._buf.position = sz;
}
startValue() {
console.assert(this._encapsStack !== null && this._encapsStack.decoder !== null);
this._encapsStack.decoder.startInstance(SliceType.ValueSlice);
}
endValue() {
console.assert(this._encapsStack !== null && this._encapsStack.decoder !== null);
return this._encapsStack.decoder.endInstance();
}
startException() {
console.assert(this._encapsStack !== null && this._encapsStack.decoder !== null);
this._encapsStack.decoder.startInstance(SliceType.ExceptionSlice);
}
endException() {
console.assert(this._encapsStack !== null && this._encapsStack.decoder !== null);
return this._encapsStack.decoder.endInstance();
}
startEncapsulation() {
let curr = this._encapsCache;
if (curr !== null) {
curr.reset();
this._encapsCache = this._encapsCache.next;
} else {
curr = new ReadEncaps();
}
curr.next = this._encapsStack;
this._encapsStack = curr;
this._encapsStack.start = this._buf.position;
//
// I don't use readSize() for encapsulations, because when creating an encapsulation,
// I must know in advance how many bytes the size information will require in the data
// stream. If I use an Int, it is always 4 bytes. For readSize(), it could be 1 or 5 bytes.
//
const sz = this.readInt();
if (sz < 6) {
throw new MarshalException(endOfBufferMessage);
}
if (sz - 4 > this._buf.remaining) {
throw new MarshalException(endOfBufferMessage);
}
this._encapsStack.sz = sz;
const encoding = new EncodingVersion();
encoding._read(this);
Protocol.checkSupportedEncoding(encoding); // Make sure the encoding is supported.
this._encapsStack.setEncoding(encoding);
return encoding;
}
endEncapsulation() {
console.assert(this._encapsStack !== null);
if (!this._encapsStack.encoding_1_0) {
this.skipOptionals();
if (this._buf.position !== this._encapsStack.start + this._encapsStack.sz) {
throw new MarshalException("Failed to unmarshal encapsulation.");
}
} else if (this._buf.position !== this._encapsStack.start + this._encapsStack.sz) {
if (this._buf.position + 1 !== this._encapsStack.start + this._encapsStack.sz) {
throw new MarshalException("Failed to unmarshal encapsulation.");
}
//
// Ice version < 3.3 had a bug where user exceptions with
// class members could be encoded with a trailing byte
// when dispatched with AMD. So we tolerate an extra byte
// in the encapsulation.
//
try {
this._buf.get();
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
const curr = this._encapsStack;
this._encapsStack = curr.next;
curr.next = this._encapsCache;
this._encapsCache = curr;
this._encapsCache.reset();
}
skipEmptyEncapsulation() {
const sz = this.readInt();
if (sz < 6) {
throw new MarshalException(`${sz} is not a valid encapsulation size.`);
}
if (sz - 4 > this._buf.remaining) {
throw new MarshalException(endOfBufferMessage);
}
const encoding = new EncodingVersion();
encoding._read(this);
Protocol.checkSupportedEncoding(encoding); // Make sure the encoding is supported.
if (encoding.equals(Encoding_1_0)) {
if (sz != 6) {
throw new MarshalException(`${sz} is not a valid encapsulation size for a 1.0 empty encapsulation.`);
}
} else {
// Skip the optional content of the encapsulation if we are expecting an
// empty encapsulation.
this._buf.position = this._buf.position + sz - 6;
}
return encoding;
}
readEncapsulation() {
const sz = this.readInt();
if (sz < 6) {
throw new MarshalException(endOfBufferMessage);
}
if (sz - 4 > this._buf.remaining) {
throw new MarshalException(endOfBufferMessage);
}
const encoding = new EncodingVersion();
encoding._read(this);
this._buf.position = this._buf.position - 6;
try {
return [encoding, this._buf.getArray(sz)];
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
getEncoding() {
return this._encapsStack !== null ? this._encapsStack.encoding : this._encoding;
}
getEncapsulationSize() {
console.assert(this._encapsStack !== null);
return this._encapsStack.sz - 6;
}
skipEncapsulation() {
const sz = this.readInt();
if (sz < 6) {
throw new MarshalException(endOfBufferMessage);
}
const encoding = new EncodingVersion();
encoding._read(this);
try {
this._buf.position = this._buf.position + sz - 6;
} catch {
throw new MarshalException(endOfBufferMessage);
}
return encoding;
}
startSlice() {
console.assert(this._encapsStack !== null && this._encapsStack.decoder !== null);
this._encapsStack.decoder.startSlice();
}
endSlice() {
console.assert(this._encapsStack !== null && this._encapsStack.decoder !== null);
this._encapsStack.decoder.endSlice();
}
skipSlice() {
console.assert(this._encapsStack !== null && this._encapsStack.decoder !== null);
this._encapsStack.decoder.skipSlice();
}
readPendingValues() {
if (this._encapsStack !== null && this._encapsStack.decoder !== null) {
this._encapsStack.decoder.readPendingValues();
} else if (
(this._encapsStack !== null && this._encapsStack.encoding_1_0) ||
(this._encapsStack === null && this._encoding.equals(Encoding_1_0))
) {
//
// If using the 1.0 encoding and no instances were read, we
// still read an empty sequence of pending instances if
// requested (i.e.: if this is called).
//
// This is required by the 1.0 encoding, even if no instances
// are written we do marshal an empty sequence if marshaled
// data types use classes.
//
this.skipSize();
}
}
readSize() {
try {
const b = this._buf.get();
if (b === 255) {
const v = this._buf.getInt();
if (v < 0) {
throw new MarshalException(endOfBufferMessage);
}
return v;
}
return b;
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readAndCheckSeqSize(minSize) {
const sz = this.readSize();
if (sz === 0) {
return sz;
}
//
// The _startSeq variable points to the start of the sequence for which
// we expect to read at least _minSeqSize bytes from the stream.
//
// If not initialized or if we already read more data than _minSeqSize,
// we reset _startSeq and _minSeqSize for this sequence (possibly a
// top-level sequence or enclosed sequence it doesn't really matter).
//
// Otherwise, we are reading an enclosed sequence and we have to bump
// _minSeqSize by the minimum size that this sequence will require on
// the stream.
//
// The goal of this check is to ensure that when we start unmarshaling
// a new sequence, we check the minimal size of this new sequence against
// the estimated remaining buffer size. This estimation is based on
// the minimum size of the enclosing sequences, it's _minSeqSize.
//
if (this._startSeq === -1 || this._buf.position > this._startSeq + this._minSeqSize) {
this._startSeq = this._buf.position;
this._minSeqSize = sz * minSize;
} else {
this._minSeqSize += sz * minSize;
}
//
// If there isn't enough data to read on the stream for the sequence (and
// possibly enclosed sequences), something is wrong with the marshaled
// data: it's claiming having more data that what is possible to read.
//
if (this._startSeq + this._minSeqSize > this._buf.limit) {
throw new MarshalException(endOfBufferMessage);
}
return sz;
}
readBlob(sz) {
if (this._buf.remaining < sz) {
throw new MarshalException(endOfBufferMessage);
}
try {
return this._buf.getArray(sz);
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readOptional(tag, expectedFormat) {
console.assert(this._encapsStack !== null);
if (this._encapsStack.decoder !== null) {
return this._encapsStack.decoder.readOptional(tag, expectedFormat);
}
return this.readOptImpl(tag, expectedFormat);
}
readOptionalHelper(tag, format, read) {
if (this.readOptional(tag, format)) {
return read.call(this);
} else {
return undefined;
}
}
readByte() {
try {
return this._buf.get();
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readByteSeq() {
return this._buf.getArray(this.readAndCheckSeqSize(1));
}
readBool() {
try {
return this._buf.get() === 1;
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readShort() {
try {
return this._buf.getShort();
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readInt() {
try {
return this._buf.getInt();
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readLong() {
try {
return this._buf.getLong();
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readFloat() {
try {
return this._buf.getFloat();
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readDouble() {
try {
return this._buf.getDouble();
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readString() {
const len = this.readSize();
if (len === 0) {
return "";
}
//
// Check the buffer has enough bytes to read.
//
if (this._buf.remaining < len) {
throw new MarshalException(endOfBufferMessage);
}
try {
return this._buf.getString(len);
} catch {
throw new MarshalException(endOfBufferMessage);
}
}
readProxy(type) {
const ident = new Identity();
ident._read(this);
const reference = this._instance.referenceFactory().createFromStream(ident, this);
const TPrx = type == null ? ObjectPrx : type;
return reference == null ? null : new TPrx(reference);
}
readOptionalProxy(tag, type) {
if (this.readOptional(tag, OptionalFormat.FSize)) {
this.skip(4);
return this.readProxy(type);
} else {
return undefined;
}
}
readEnum(T) {
let v;
if (this.getEncoding().equals(Encoding_1_0)) {
if (T.maxValue < 127) {
v = this.readByte();
} else if (T.maxValue < 32767) {
v = this.readShort();
} else {
v = this.readInt();
}
} else {
v = this.readSize();
}
const e = T.valueOf(v);
if (e === undefined) {
throw new MarshalException(`enumerator value '${v}' is out of range`);
}
return e;
}
readOptionalEnum(tag, T) {
if (this.readOptional(tag, OptionalFormat.Size)) {
return this.readEnum(T);
} else {
return undefined;
}
}
readValue(cb, T) {
this.initEncaps();
this._encapsStack.decoder.readValue(obj => {
if (obj !== null && !(obj instanceof T)) {
throwUOE(T.ice_staticId(), obj);
}
cb(obj);
});
}
throwException() {
this.initEncaps();
this._encapsStack.decoder.throwException();
}
readOptImpl(readTag, expectedFormat) {
if (this.isEncoding_1_0()) {
return false; // Optional members aren't supported with the 1.0 encoding.
}
while (true) {
if (this._buf.position >= this._encapsStack.start + this._encapsStack.sz) {
return false; // End of encapsulation also indicates end of optionals.
}
const v = this.readByte();
if (v === Protocol.OPTIONAL_END_MARKER) {
this._buf.position -= 1; // Rewind.
return false;
}
const format = OptionalFormat.valueOf(v & 0x07); // First 3 bits.
let tag = v >> 3;
if (tag === 30) {
tag = this.readSize();
}
if (tag > readTag) {
const offset = tag < 30 ? 1 : tag < 255 ? 2 : 6; // Rewind
this._buf.position -= offset;
return false; // No optional data members with the requested tag.
} else if (tag < readTag) {
this.skipOptional(format); // Skip optional data members
} else {
if (format !== expectedFormat) {
throw new MarshalException(`invalid optional data member '${tag}': unexpected format`);
}
return true;
}
}
}
skipOptional(format) {
switch (format) {
case OptionalFormat.F1: {
this.skip(1);
break;
}
case OptionalFormat.F2: {
this.skip(2);
break;
}
case OptionalFormat.F4: {
this.skip(4);
break;
}
case OptionalFormat.F8: {
this.skip(8);
break;
}
case OptionalFormat.Size: {
this.skipSize();
break;
}
case OptionalFormat.VSize: {
this.skip(this.readSize());
break;
}
case OptionalFormat.FSize: {
this.skip(this.readInt());
break;
}
case OptionalFormat.Class: {
throw new MarshalException("cannot skip an optional class");
}
default: {
console.assert(false);
break;
}
}
}
skipOptionals() {
//
// Skip remaining un-read optional members.
//
while (true) {
if (this._buf.position >= this._encapsStack.start + this._encapsStack.sz) {
return; // End of encapsulation also indicates end of optionals.
}
const b = this.readByte();
const v = b < 0 ? b + 256 : b;
if (v === Protocol.OPTIONAL_END_MARKER) {
return;
}
const format = OptionalFormat.valueOf(v & 0x07); // Read first 3 bits.
if (v >> 3 === 30) {
this.skipSize();
}
this.skipOptional(format);
}
}
skip(size) {
if (size > this._buf.remaining) {
throw new MarshalException(endOfBufferMessage);
}
this._buf.position += size;
}
skipSize() {
const b = this.readByte();
if (b === 255) {
this.skip(4);
}
}
isEmpty() {
return this._buf.empty();
}
isEncoding_1_0() {
return this._encapsStack !== null ? this._encapsStack.encoding_1_0 : this._encoding.equals(Encoding_1_0);
}
initEncaps() {
if (this._encapsStack === null) {
// Lazy initialization
this._encapsStack = this._encapsCache;
if (this._encapsStack !== null) {
this._encapsCache = this._encapsCache.next;
} else {
this._encapsStack = new ReadEncaps();
}
this._encapsStack.setEncoding(this._encoding);
this._encapsStack.sz = this._buf.limit;
}
if (this._encapsStack.decoder === null) {
// Lazy initialization.
if (this._encapsStack.encoding_1_0) {
this._encapsStack.decoder = new EncapsDecoder10(this, this._encapsStack, this._classGraphDepthMax);
} else {
this._encapsStack.decoder = new EncapsDecoder11(this, this._encapsStack, this._classGraphDepthMax);
}
}
}
traceSkipSlice(typeId, sliceType) {
if (this._instance.traceLevels().slicing > 0) {
traceSlicing(
sliceType === SliceType.ExceptionSlice ? "exception" : "object",
typeId,
"Slicing",
this._instance.initializationData().logger,
);
}
}
get pos() {
return this._buf.position;
}
set pos(value) {
this._buf.position = value;
}
get size() {
return this._buf.limit;
}
get instance() {
return this._instance;
}
get buffer() {
return this._buf;
}
}
|