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Unified Diff: net/spdy/hpack_input_stream.cc

Issue 992733002: Remove //net (except for Android test stuff) and sdch (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 9 months ago
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Index: net/spdy/hpack_input_stream.cc
diff --git a/net/spdy/hpack_input_stream.cc b/net/spdy/hpack_input_stream.cc
deleted file mode 100644
index 87a3af4ec7829c54232ecf808f7a8c073749d060..0000000000000000000000000000000000000000
--- a/net/spdy/hpack_input_stream.cc
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/spdy/hpack_input_stream.h"
-
-#include <algorithm>
-
-#include "base/basictypes.h"
-#include "base/logging.h"
-
-namespace net {
-
-using base::StringPiece;
-using std::string;
-
-HpackInputStream::HpackInputStream(uint32 max_string_literal_size,
- StringPiece buffer)
- : max_string_literal_size_(max_string_literal_size),
- buffer_(buffer),
- bit_offset_(0) {}
-
-HpackInputStream::~HpackInputStream() {}
-
-bool HpackInputStream::HasMoreData() const {
- return !buffer_.empty();
-}
-
-bool HpackInputStream::MatchPrefixAndConsume(HpackPrefix prefix) {
- DCHECK_GT(prefix.bit_size, 0u);
- DCHECK_LE(prefix.bit_size, 8u);
-
- uint32 peeked = 0;
- size_t peeked_count = 0;
-
- if (!PeekBits(&peeked_count, &peeked))
- return false;
-
- if ((peeked >> (32 - prefix.bit_size)) == prefix.bits) {
- ConsumeBits(prefix.bit_size);
- return true;
- }
- return false;
-}
-
-bool HpackInputStream::PeekNextOctet(uint8* next_octet) {
- if ((bit_offset_ > 0) || buffer_.empty())
- return false;
-
- *next_octet = buffer_[0];
- return true;
-}
-
-bool HpackInputStream::DecodeNextOctet(uint8* next_octet) {
- if (!PeekNextOctet(next_octet))
- return false;
-
- buffer_.remove_prefix(1);
- return true;
-}
-
-bool HpackInputStream::DecodeNextUint32(uint32* I) {
- size_t N = 8 - bit_offset_;
- DCHECK_GT(N, 0u);
- DCHECK_LE(N, 8u);
-
- bit_offset_ = 0;
-
- *I = 0;
-
- uint8 next_marker = (1 << N) - 1;
- uint8 next_octet = 0;
- if (!DecodeNextOctet(&next_octet))
- return false;
- *I = next_octet & next_marker;
-
- bool has_more = (*I == next_marker);
- size_t shift = 0;
- while (has_more && (shift < 32)) {
- uint8 next_octet = 0;
- if (!DecodeNextOctet(&next_octet))
- return false;
- has_more = (next_octet & 0x80) != 0;
- next_octet &= 0x7f;
- uint32 addend = next_octet << shift;
- // Check for overflow.
- if ((addend >> shift) != next_octet) {
- return false;
- }
- *I += addend;
- shift += 7;
- }
-
- return !has_more;
-}
-
-bool HpackInputStream::DecodeNextIdentityString(StringPiece* str) {
- uint32 size = 0;
- if (!DecodeNextUint32(&size))
- return false;
-
- if (size > max_string_literal_size_)
- return false;
-
- if (size > buffer_.size())
- return false;
-
- *str = StringPiece(buffer_.data(), size);
- buffer_.remove_prefix(size);
- return true;
-}
-
-bool HpackInputStream::DecodeNextHuffmanString(const HpackHuffmanTable& table,
- string* str) {
- uint32 encoded_size = 0;
- if (!DecodeNextUint32(&encoded_size))
- return false;
-
- if (encoded_size > buffer_.size())
- return false;
-
- HpackInputStream bounded_reader(
- max_string_literal_size_,
- StringPiece(buffer_.data(), encoded_size));
- buffer_.remove_prefix(encoded_size);
-
- // HpackHuffmanTable will not decode beyond |max_string_literal_size_|.
- return table.DecodeString(&bounded_reader, max_string_literal_size_, str);
-}
-
-bool HpackInputStream::PeekBits(size_t* peeked_count, uint32* out) {
- size_t byte_offset = (bit_offset_ + *peeked_count) / 8;
- size_t bit_offset = (bit_offset_ + *peeked_count) % 8;
-
- if (*peeked_count >= 32 || byte_offset >= buffer_.size()) {
- return false;
- }
- // We'll read the minimum of the current byte remainder,
- // and the remaining unfilled bits of |out|.
- size_t bits_to_read = std::min(32 - *peeked_count, 8 - bit_offset);
-
- uint32 new_bits = static_cast<uint32>(buffer_[byte_offset]);
- // Shift byte remainder to most-signifcant bits of |new_bits|.
- // This drops the leading |bit_offset| bits of the byte.
- new_bits = new_bits << (24 + bit_offset);
- // Shift bits to the most-significant open bits of |out|.
- new_bits = new_bits >> *peeked_count;
-
- CHECK_EQ(*out & new_bits, 0u);
- *out |= new_bits;
-
- *peeked_count += bits_to_read;
- return true;
-}
-
-void HpackInputStream::ConsumeBits(size_t bit_count) {
- size_t byte_count = (bit_offset_ + bit_count) / 8;
- bit_offset_ = (bit_offset_ + bit_count) % 8;
- CHECK_GE(buffer_.size(), byte_count);
- if (bit_offset_ != 0) {
- CHECK_GT(buffer_.size(), 0u);
- }
- buffer_.remove_prefix(byte_count);
-}
-
-void HpackInputStream::ConsumeByteRemainder() {
- if (bit_offset_ != 0) {
- ConsumeBits(8 - bit_offset_);
- }
-}
-
-} // namespace net
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