500 lines
15 KiB
Mathematica
500 lines
15 KiB
Mathematica
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import "GPBCodedInputStream_PackagePrivate.h"
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#import "GPBDictionary_PackagePrivate.h"
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#import "GPBMessage_PackagePrivate.h"
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#import "GPBUnknownFieldSet_PackagePrivate.h"
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#import "GPBUtilities_PackagePrivate.h"
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#import "GPBWireFormat.h"
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static const NSUInteger kDefaultRecursionLimit = 64;
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static void CheckSize(GPBCodedInputStreamState *state, size_t size) {
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size_t newSize = state->bufferPos + size;
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if (newSize > state->bufferSize) {
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[NSException raise:NSParseErrorException format:@""];
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}
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if (newSize > state->currentLimit) {
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// Fast forward to end of currentLimit;
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state->bufferPos = state->currentLimit;
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[NSException raise:NSParseErrorException format:@""];
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}
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}
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static int8_t ReadRawByte(GPBCodedInputStreamState *state) {
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CheckSize(state, sizeof(int8_t));
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return ((int8_t *)state->bytes)[state->bufferPos++];
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}
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static int32_t ReadRawLittleEndian32(GPBCodedInputStreamState *state) {
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CheckSize(state, sizeof(int32_t));
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int32_t value = OSReadLittleInt32(state->bytes, state->bufferPos);
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state->bufferPos += sizeof(int32_t);
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return value;
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}
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static int64_t ReadRawLittleEndian64(GPBCodedInputStreamState *state) {
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CheckSize(state, sizeof(int64_t));
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int64_t value = OSReadLittleInt64(state->bytes, state->bufferPos);
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state->bufferPos += sizeof(int64_t);
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return value;
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}
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static int32_t ReadRawVarint32(GPBCodedInputStreamState *state) {
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int8_t tmp = ReadRawByte(state);
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if (tmp >= 0) {
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return tmp;
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}
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int32_t result = tmp & 0x7f;
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if ((tmp = ReadRawByte(state)) >= 0) {
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result |= tmp << 7;
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} else {
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result |= (tmp & 0x7f) << 7;
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if ((tmp = ReadRawByte(state)) >= 0) {
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result |= tmp << 14;
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} else {
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result |= (tmp & 0x7f) << 14;
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if ((tmp = ReadRawByte(state)) >= 0) {
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result |= tmp << 21;
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} else {
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result |= (tmp & 0x7f) << 21;
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result |= (tmp = ReadRawByte(state)) << 28;
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if (tmp < 0) {
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// Discard upper 32 bits.
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for (int i = 0; i < 5; i++) {
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if (ReadRawByte(state) >= 0) {
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return result;
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}
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}
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[NSException raise:NSParseErrorException
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format:@"Unable to read varint32"];
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}
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}
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}
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}
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return result;
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}
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static int64_t ReadRawVarint64(GPBCodedInputStreamState *state) {
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int32_t shift = 0;
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int64_t result = 0;
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while (shift < 64) {
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int8_t b = ReadRawByte(state);
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result |= (int64_t)(b & 0x7F) << shift;
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if ((b & 0x80) == 0) {
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return result;
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}
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shift += 7;
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}
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[NSException raise:NSParseErrorException format:@"Unable to read varint64"];
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return 0;
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}
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static void SkipRawData(GPBCodedInputStreamState *state, size_t size) {
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CheckSize(state, size);
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state->bufferPos += size;
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}
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double GPBCodedInputStreamReadDouble(GPBCodedInputStreamState *state) {
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int64_t value = ReadRawLittleEndian64(state);
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return GPBConvertInt64ToDouble(value);
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}
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float GPBCodedInputStreamReadFloat(GPBCodedInputStreamState *state) {
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int32_t value = ReadRawLittleEndian32(state);
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return GPBConvertInt32ToFloat(value);
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}
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uint64_t GPBCodedInputStreamReadUInt64(GPBCodedInputStreamState *state) {
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uint64_t value = ReadRawVarint64(state);
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return value;
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}
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uint32_t GPBCodedInputStreamReadUInt32(GPBCodedInputStreamState *state) {
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uint32_t value = ReadRawVarint32(state);
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return value;
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}
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int64_t GPBCodedInputStreamReadInt64(GPBCodedInputStreamState *state) {
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int64_t value = ReadRawVarint64(state);
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return value;
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}
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int32_t GPBCodedInputStreamReadInt32(GPBCodedInputStreamState *state) {
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int32_t value = ReadRawVarint32(state);
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return value;
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}
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uint64_t GPBCodedInputStreamReadFixed64(GPBCodedInputStreamState *state) {
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uint64_t value = ReadRawLittleEndian64(state);
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return value;
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}
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uint32_t GPBCodedInputStreamReadFixed32(GPBCodedInputStreamState *state) {
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uint32_t value = ReadRawLittleEndian32(state);
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return value;
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}
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int32_t GPBCodedInputStreamReadEnum(GPBCodedInputStreamState *state) {
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int32_t value = ReadRawVarint32(state);
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return value;
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}
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int32_t GPBCodedInputStreamReadSFixed32(GPBCodedInputStreamState *state) {
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int32_t value = ReadRawLittleEndian32(state);
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return value;
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}
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int64_t GPBCodedInputStreamReadSFixed64(GPBCodedInputStreamState *state) {
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int64_t value = ReadRawLittleEndian64(state);
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return value;
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}
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int32_t GPBCodedInputStreamReadSInt32(GPBCodedInputStreamState *state) {
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int32_t value = GPBDecodeZigZag32(ReadRawVarint32(state));
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return value;
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}
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int64_t GPBCodedInputStreamReadSInt64(GPBCodedInputStreamState *state) {
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int64_t value = GPBDecodeZigZag64(ReadRawVarint64(state));
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return value;
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}
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BOOL GPBCodedInputStreamReadBool(GPBCodedInputStreamState *state) {
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return ReadRawVarint32(state) != 0;
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}
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int32_t GPBCodedInputStreamReadTag(GPBCodedInputStreamState *state) {
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if (GPBCodedInputStreamIsAtEnd(state)) {
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state->lastTag = 0;
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return 0;
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}
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state->lastTag = ReadRawVarint32(state);
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if (state->lastTag == 0) {
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// If we actually read zero, that's not a valid tag.
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[NSException raise:NSParseErrorException
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format:@"Invalid last tag %d", state->lastTag];
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}
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return state->lastTag;
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}
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NSString *GPBCodedInputStreamReadRetainedString(
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GPBCodedInputStreamState *state) {
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int32_t size = ReadRawVarint32(state);
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NSString *result;
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if (size == 0) {
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result = @"";
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} else {
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CheckSize(state, size);
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result = [[NSString alloc] initWithBytes:&state->bytes[state->bufferPos]
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length:size
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encoding:NSUTF8StringEncoding];
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state->bufferPos += size;
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if (!result) {
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#ifdef DEBUG
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// https://developers.google.com/protocol-buffers/docs/proto#scalar
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NSLog(@"UTF-8 failure, is some field type 'string' when it should be "
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@"'bytes'?");
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#endif
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[NSException raise:NSParseErrorException
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format:@"Invalid UTF-8 for a 'string'"];
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}
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}
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return result;
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}
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NSData *GPBCodedInputStreamReadRetainedBytes(GPBCodedInputStreamState *state) {
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int32_t size = ReadRawVarint32(state);
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if (size < 0) return nil;
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CheckSize(state, size);
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NSData *result = [[NSData alloc] initWithBytes:state->bytes + state->bufferPos
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length:size];
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state->bufferPos += size;
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return result;
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}
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NSData *GPBCodedInputStreamReadRetainedBytesNoCopy(
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GPBCodedInputStreamState *state) {
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int32_t size = ReadRawVarint32(state);
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if (size < 0) return nil;
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CheckSize(state, size);
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// Cast is safe because freeWhenDone is NO.
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NSData *result = [[NSData alloc]
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initWithBytesNoCopy:(void *)(state->bytes + state->bufferPos)
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length:size
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freeWhenDone:NO];
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state->bufferPos += size;
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return result;
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}
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size_t GPBCodedInputStreamPushLimit(GPBCodedInputStreamState *state,
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size_t byteLimit) {
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byteLimit += state->bufferPos;
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size_t oldLimit = state->currentLimit;
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if (byteLimit > oldLimit) {
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[NSException raise:NSInvalidArgumentException
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format:@"byteLimit > oldLimit: %tu > %tu", byteLimit, oldLimit];
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}
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state->currentLimit = byteLimit;
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return oldLimit;
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}
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void GPBCodedInputStreamPopLimit(GPBCodedInputStreamState *state,
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size_t oldLimit) {
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state->currentLimit = oldLimit;
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}
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size_t GPBCodedInputStreamBytesUntilLimit(GPBCodedInputStreamState *state) {
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return state->currentLimit - state->bufferPos;
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}
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BOOL GPBCodedInputStreamIsAtEnd(GPBCodedInputStreamState *state) {
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return (state->bufferPos == state->bufferSize) ||
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(state->bufferPos == state->currentLimit);
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}
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void GPBCodedInputStreamCheckLastTagWas(GPBCodedInputStreamState *state,
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int32_t value) {
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if (state->lastTag != value) {
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[NSException raise:NSParseErrorException
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format:@"Last tag: %d should be %d", state->lastTag, value];
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}
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}
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@implementation GPBCodedInputStream
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+ (instancetype)streamWithData:(NSData *)data {
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return [[[self alloc] initWithData:data] autorelease];
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}
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- (instancetype)initWithData:(NSData *)data {
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if ((self = [super init])) {
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#ifdef DEBUG
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NSCAssert([self class] == [GPBCodedInputStream class],
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@"Subclassing of GPBCodedInputStream is not allowed.");
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#endif
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buffer_ = [data retain];
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state_.bytes = (const uint8_t *)[data bytes];
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state_.bufferSize = [data length];
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state_.currentLimit = state_.bufferSize;
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}
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return self;
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}
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- (void)dealloc {
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[buffer_ release];
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[super dealloc];
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}
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- (int32_t)readTag {
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return GPBCodedInputStreamReadTag(&state_);
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}
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- (void)checkLastTagWas:(int32_t)value {
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GPBCodedInputStreamCheckLastTagWas(&state_, value);
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}
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- (BOOL)skipField:(int32_t)tag {
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switch (GPBWireFormatGetTagWireType(tag)) {
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case GPBWireFormatVarint:
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GPBCodedInputStreamReadInt32(&state_);
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return YES;
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case GPBWireFormatFixed64:
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SkipRawData(&state_, sizeof(int64_t));
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return YES;
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case GPBWireFormatLengthDelimited:
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SkipRawData(&state_, ReadRawVarint32(&state_));
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return YES;
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case GPBWireFormatStartGroup:
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[self skipMessage];
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GPBCodedInputStreamCheckLastTagWas(
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&state_, GPBWireFormatMakeTag(GPBWireFormatGetTagFieldNumber(tag),
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GPBWireFormatEndGroup));
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return YES;
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case GPBWireFormatEndGroup:
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return NO;
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case GPBWireFormatFixed32:
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SkipRawData(&state_, sizeof(int32_t));
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return YES;
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}
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[NSException raise:NSParseErrorException format:@"Invalid tag %d", tag];
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return NO;
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}
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- (void)skipMessage {
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while (YES) {
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int32_t tag = GPBCodedInputStreamReadTag(&state_);
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if (tag == 0 || ![self skipField:tag]) {
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return;
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}
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}
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}
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- (BOOL)isAtEnd {
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return GPBCodedInputStreamIsAtEnd(&state_);
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}
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- (size_t)position {
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return state_.bufferPos;
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}
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- (double)readDouble {
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return GPBCodedInputStreamReadDouble(&state_);
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}
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- (float)readFloat {
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return GPBCodedInputStreamReadFloat(&state_);
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}
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|
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|
||
|
|
- (uint64_t)readUInt64 {
|
||
|
|
return GPBCodedInputStreamReadUInt64(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (int64_t)readInt64 {
|
||
|
|
return GPBCodedInputStreamReadInt64(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (int32_t)readInt32 {
|
||
|
|
return GPBCodedInputStreamReadInt32(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (uint64_t)readFixed64 {
|
||
|
|
return GPBCodedInputStreamReadFixed64(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (uint32_t)readFixed32 {
|
||
|
|
return GPBCodedInputStreamReadFixed32(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (BOOL)readBool {
|
||
|
|
return GPBCodedInputStreamReadBool(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (NSString *)readString {
|
||
|
|
return [GPBCodedInputStreamReadRetainedString(&state_) autorelease];
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)readGroup:(int32_t)fieldNumber
|
||
|
|
message:(GPBMessage *)message
|
||
|
|
extensionRegistry:(GPBExtensionRegistry *)extensionRegistry {
|
||
|
|
if (state_.recursionDepth >= kDefaultRecursionLimit) {
|
||
|
|
[NSException raise:NSParseErrorException
|
||
|
|
format:@"recursionDepth(%tu) >= %tu", state_.recursionDepth,
|
||
|
|
kDefaultRecursionLimit];
|
||
|
|
}
|
||
|
|
++state_.recursionDepth;
|
||
|
|
[message mergeFromCodedInputStream:self extensionRegistry:extensionRegistry];
|
||
|
|
GPBCodedInputStreamCheckLastTagWas(
|
||
|
|
&state_, GPBWireFormatMakeTag(fieldNumber, GPBWireFormatEndGroup));
|
||
|
|
--state_.recursionDepth;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)readUnknownGroup:(int32_t)fieldNumber
|
||
|
|
message:(GPBUnknownFieldSet *)message {
|
||
|
|
if (state_.recursionDepth >= kDefaultRecursionLimit) {
|
||
|
|
[NSException raise:NSParseErrorException
|
||
|
|
format:@"recursionDepth(%tu) >= %tu", state_.recursionDepth,
|
||
|
|
kDefaultRecursionLimit];
|
||
|
|
}
|
||
|
|
++state_.recursionDepth;
|
||
|
|
[message mergeFromCodedInputStream:self];
|
||
|
|
GPBCodedInputStreamCheckLastTagWas(
|
||
|
|
&state_, GPBWireFormatMakeTag(fieldNumber, GPBWireFormatEndGroup));
|
||
|
|
--state_.recursionDepth;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)readMessage:(GPBMessage *)message
|
||
|
|
extensionRegistry:(GPBExtensionRegistry *)extensionRegistry {
|
||
|
|
int32_t length = ReadRawVarint32(&state_);
|
||
|
|
if (state_.recursionDepth >= kDefaultRecursionLimit) {
|
||
|
|
[NSException raise:NSParseErrorException
|
||
|
|
format:@"recursionDepth(%tu) >= %tu", state_.recursionDepth,
|
||
|
|
kDefaultRecursionLimit];
|
||
|
|
}
|
||
|
|
size_t oldLimit = GPBCodedInputStreamPushLimit(&state_, length);
|
||
|
|
++state_.recursionDepth;
|
||
|
|
[message mergeFromCodedInputStream:self extensionRegistry:extensionRegistry];
|
||
|
|
GPBCodedInputStreamCheckLastTagWas(&state_, 0);
|
||
|
|
--state_.recursionDepth;
|
||
|
|
GPBCodedInputStreamPopLimit(&state_, oldLimit);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)readMapEntry:(id)mapDictionary
|
||
|
|
extensionRegistry:(GPBExtensionRegistry *)extensionRegistry
|
||
|
|
field:(GPBFieldDescriptor *)field
|
||
|
|
parentMessage:(GPBMessage *)parentMessage {
|
||
|
|
int32_t length = ReadRawVarint32(&state_);
|
||
|
|
if (state_.recursionDepth >= kDefaultRecursionLimit) {
|
||
|
|
[NSException raise:NSParseErrorException
|
||
|
|
format:@"recursionDepth(%tu) >= %tu", state_.recursionDepth,
|
||
|
|
kDefaultRecursionLimit];
|
||
|
|
}
|
||
|
|
size_t oldLimit = GPBCodedInputStreamPushLimit(&state_, length);
|
||
|
|
++state_.recursionDepth;
|
||
|
|
GPBDictionaryReadEntry(mapDictionary, self, extensionRegistry, field,
|
||
|
|
parentMessage);
|
||
|
|
GPBCodedInputStreamCheckLastTagWas(&state_, 0);
|
||
|
|
--state_.recursionDepth;
|
||
|
|
GPBCodedInputStreamPopLimit(&state_, oldLimit);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (NSData *)readBytes {
|
||
|
|
return [GPBCodedInputStreamReadRetainedBytes(&state_) autorelease];
|
||
|
|
}
|
||
|
|
|
||
|
|
- (uint32_t)readUInt32 {
|
||
|
|
return GPBCodedInputStreamReadUInt32(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (int32_t)readEnum {
|
||
|
|
return GPBCodedInputStreamReadEnum(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (int32_t)readSFixed32 {
|
||
|
|
return GPBCodedInputStreamReadSFixed32(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (int64_t)readSFixed64 {
|
||
|
|
return GPBCodedInputStreamReadSFixed64(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (int32_t)readSInt32 {
|
||
|
|
return GPBCodedInputStreamReadSInt32(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (int64_t)readSInt64 {
|
||
|
|
return GPBCodedInputStreamReadSInt64(&state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|