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// Copyright (c) 2006-2008 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 "chrome/installer/util/lzma_util.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/string_util.h"
extern "C" {
#include "third_party/lzma_sdk/Archive/7z/7zExtract.h"
#include "third_party/lzma_sdk/Archive/7z/7zIn.h"
#include "third_party/lzma_sdk/7zCrc.h"
}
namespace installer {
typedef struct _CFileInStream {
ISzInStream InStream;
HANDLE File;
} CFileInStream;
size_t LzmaReadFile(HANDLE file, void *data, size_t size) {
if (size == 0)
return 0;
size_t processedSize = 0;
do {
DWORD processedLoc = 0;
BOOL res = ReadFile(file, data, (DWORD) size, &processedLoc, NULL);
data = (void *)((unsigned char *) data + processedLoc);
size -= processedLoc;
processedSize += processedLoc;
if (!res || processedLoc == 0)
break;
} while (size > 0);
return processedSize;
}
SZ_RESULT SzFileSeekImp(void *object, CFileSize pos) {
CFileInStream *s = (CFileInStream *) object;
LARGE_INTEGER value;
value.LowPart = (DWORD) pos;
value.HighPart = (LONG) ((UInt64) pos >> 32);
value.LowPart = SetFilePointer(s->File, value.LowPart, &value.HighPart,
FILE_BEGIN);
if (value.LowPart == 0xFFFFFFFF) {
if(GetLastError() != NO_ERROR) {
return SZE_FAIL;
}
}
return SZ_OK;
}
SZ_RESULT SzFileReadImp(void *object, void **buffer,
size_t maxRequiredSize, size_t *processedSize) {
const int kBufferSize = 1 << 12;
static Byte g_Buffer[kBufferSize];
if (maxRequiredSize > kBufferSize) {
maxRequiredSize = kBufferSize;
}
CFileInStream *s = (CFileInStream *) object;
size_t processedSizeLoc;
processedSizeLoc = LzmaReadFile(s->File, g_Buffer, maxRequiredSize);
*buffer = g_Buffer;
if (processedSize != 0) {
*processedSize = processedSizeLoc;
}
return SZ_OK;
}
LzmaUtil::LzmaUtil() : archive_handle_(NULL) {}
LzmaUtil::~LzmaUtil() {
if (archive_handle_) CloseArchive();
}
DWORD LzmaUtil::OpenArchive(const std::wstring& archivePath) {
DWORD ret = NO_ERROR;
archive_handle_ = CreateFile(archivePath.c_str(), GENERIC_READ,
FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (archive_handle_ == INVALID_HANDLE_VALUE) {
ret = GetLastError();
}
return ret;
}
// Unpacks the archive to the given location.
DWORD LzmaUtil::UnPack(const std::wstring& location) {
CFileInStream archiveStream;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
CArchiveDatabaseEx db;
DWORD ret = NO_ERROR;
archiveStream.File = archive_handle_;
archiveStream.InStream.Read = SzFileReadImp;
archiveStream.InStream.Seek = SzFileSeekImp;
allocImp.Alloc = SzAlloc;
allocImp.Free = SzFree;
allocTempImp.Alloc = SzAllocTemp;
allocTempImp.Free = SzFreeTemp;
CrcGenerateTable();
SzArDbExInit(&db);
if ((ret = SzArchiveOpen(&archiveStream.InStream, &db,
&allocImp, &allocTempImp)) != SZ_OK) {
return ret;
}
Byte *outBuffer = 0; // it must be 0 before first call for each new archive
UInt32 blockIndex = 0xFFFFFFFF; // can have any value if outBuffer = 0
size_t outBufferSize = 0; // can have any value if outBuffer = 0
for (unsigned int i = 0; i < db.Database.NumFiles; i++) {
DWORD written;
size_t offset;
size_t outSizeProcessed;
CFileItem *f = db.Database.Files + i;
if ((ret = SzExtract(&archiveStream.InStream, &db, i, &blockIndex,
&outBuffer, &outBufferSize, &offset, &outSizeProcessed,
&allocImp, &allocTempImp)) != SZ_OK) {
break;
}
// Append location to the file path in archive, to get full path.
std::wstring wfileName(location);
file_util::AppendToPath(&wfileName, UTF8ToWide(f->Name));
// If archive entry is directory create it and move on to the next entry.
if (f->IsDirectory) {
file_util::CreateDirectory(wfileName);
continue;
}
HANDLE hFile;
std::wstring directory = file_util::GetDirectoryFromPath(wfileName);
file_util::CreateDirectory(directory);
hFile = CreateFile(wfileName.c_str(), GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
ret = GetLastError();
break;
}
WriteFile(hFile, outBuffer + offset, (DWORD) outSizeProcessed,
&written, NULL);
if (written != outSizeProcessed) {
ret = GetLastError();
CloseHandle(hFile);
break;
}
if (f->IsLastWriteTimeDefined) {
if (!SetFileTime(hFile, NULL, NULL,
(const FILETIME *)&(f->LastWriteTime))) {
ret = GetLastError();
CloseHandle(hFile);
break;
}
}
if (!CloseHandle(hFile)) {
ret = GetLastError();
break;
}
} // for loop
allocImp.Free(outBuffer);
SzArDbExFree(&db, allocImp.Free);
return ret;
}
void LzmaUtil::CloseArchive() {
CloseHandle(archive_handle_);
archive_handle_ = NULL;
}
} // namespace installer
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