mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 14:26:09 +03:00
130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
// Copyright (c) 2013 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/disk_cache/simple/simple_util.h"
|
|
|
|
#include <limits>
|
|
|
|
#include "base/files/file_util.h"
|
|
#include "base/format_macros.h"
|
|
#include "base/logging.h"
|
|
#include "base/numerics/safe_conversions.h"
|
|
#include "base/sha1.h"
|
|
#include "base/strings/string_number_conversions.h"
|
|
#include "base/strings/stringprintf.h"
|
|
#include "base/threading/thread_restrictions.h"
|
|
#include "base/time/time.h"
|
|
#include "net/disk_cache/simple/simple_entry_format.h"
|
|
#include "third_party/zlib/zlib.h"
|
|
|
|
namespace {
|
|
|
|
// Size of the uint64_t hash_key number in Hex format in a string.
|
|
const size_t kEntryHashKeyAsHexStringSize = 2 * sizeof(uint64_t);
|
|
|
|
} // namespace
|
|
|
|
namespace disk_cache {
|
|
|
|
namespace simple_util {
|
|
|
|
std::string ConvertEntryHashKeyToHexString(uint64_t hash_key) {
|
|
const std::string hash_key_str = base::StringPrintf("%016" PRIx64, hash_key);
|
|
DCHECK_EQ(kEntryHashKeyAsHexStringSize, hash_key_str.size());
|
|
return hash_key_str;
|
|
}
|
|
|
|
std::string GetEntryHashKeyAsHexString(const std::string& key) {
|
|
std::string hash_key_str =
|
|
ConvertEntryHashKeyToHexString(GetEntryHashKey(key));
|
|
DCHECK_EQ(kEntryHashKeyAsHexStringSize, hash_key_str.size());
|
|
return hash_key_str;
|
|
}
|
|
|
|
bool GetEntryHashKeyFromHexString(const base::StringPiece& hash_key,
|
|
uint64_t* hash_key_out) {
|
|
if (hash_key.size() != kEntryHashKeyAsHexStringSize) {
|
|
return false;
|
|
}
|
|
return base::HexStringToUInt64(hash_key, hash_key_out);
|
|
}
|
|
|
|
uint64_t GetEntryHashKey(const std::string& key) {
|
|
union {
|
|
unsigned char sha_hash[base::kSHA1Length];
|
|
uint64_t key_hash;
|
|
} u;
|
|
base::SHA1HashBytes(reinterpret_cast<const unsigned char*>(key.data()),
|
|
key.size(), u.sha_hash);
|
|
return u.key_hash;
|
|
}
|
|
|
|
std::string GetFilenameFromEntryFileKeyAndFileIndex(
|
|
const SimpleFileTracker::EntryFileKey& key,
|
|
int file_index) {
|
|
if (key.doom_generation == 0)
|
|
return base::StringPrintf("%016" PRIx64 "_%1d", key.entry_hash, file_index);
|
|
else
|
|
return base::StringPrintf("todelete_%016" PRIx64 "_%1d_%" PRIu64,
|
|
key.entry_hash, file_index, key.doom_generation);
|
|
}
|
|
|
|
std::string GetSparseFilenameFromEntryFileKey(
|
|
const SimpleFileTracker::EntryFileKey& key) {
|
|
if (key.doom_generation == 0)
|
|
return base::StringPrintf("%016" PRIx64 "_s", key.entry_hash);
|
|
else
|
|
return base::StringPrintf("todelete_%016" PRIx64 "_s_%" PRIu64,
|
|
key.entry_hash, key.doom_generation);
|
|
}
|
|
|
|
std::string GetFilenameFromKeyAndFileIndex(const std::string& key,
|
|
int file_index) {
|
|
return GetEntryHashKeyAsHexString(key) +
|
|
base::StringPrintf("_%1d", file_index);
|
|
}
|
|
|
|
size_t GetHeaderSize(size_t key_length) {
|
|
return sizeof(SimpleFileHeader) + key_length;
|
|
}
|
|
|
|
int32_t GetDataSizeFromFileSize(size_t key_length, int64_t file_size) {
|
|
int64_t data_size =
|
|
file_size - key_length - sizeof(SimpleFileHeader) - sizeof(SimpleFileEOF);
|
|
return base::checked_cast<int32_t>(data_size);
|
|
}
|
|
|
|
int64_t GetFileSizeFromDataSize(size_t key_length, int32_t data_size) {
|
|
return data_size + key_length + sizeof(SimpleFileHeader) +
|
|
sizeof(SimpleFileEOF);
|
|
}
|
|
|
|
int GetFileIndexFromStreamIndex(int stream_index) {
|
|
return (stream_index == 2) ? 1 : 0;
|
|
}
|
|
|
|
bool GetMTime(const base::FilePath& path, base::Time* out_mtime) {
|
|
DCHECK(out_mtime);
|
|
base::File::Info file_info;
|
|
if (!base::GetFileInfo(path, &file_info))
|
|
return false;
|
|
*out_mtime = file_info.last_modified;
|
|
return true;
|
|
}
|
|
|
|
uint32_t Crc32(const char* data, int length) {
|
|
uint32_t empty_crc = crc32(0, Z_NULL, 0);
|
|
if (length == 0)
|
|
return empty_crc;
|
|
return crc32(empty_crc, reinterpret_cast<const Bytef*>(data), length);
|
|
}
|
|
|
|
uint32_t IncrementalCrc32(uint32_t previous_crc, const char* data, int length) {
|
|
return crc32(previous_crc, reinterpret_cast<const Bytef*>(data), length);
|
|
}
|
|
|
|
} // namespace simple_util
|
|
|
|
} // namespace disk_cache
|