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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "import/cross/precompile.h"
#include <sys/stat.h>
#include "import/cross/archive_processor.h"
#include "base/logging.h"
#include "import/cross/memory_buffer.h"
#include "zlib.h"
const int kChunkSize = 16384;
namespace o3d {
#ifdef _DEBUG
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// For debugging only, report a zlib or i/o error
void zerr(int ret) {
LOG(ERROR) << "ArchiveProcessor: ";
switch (ret) {
case Z_ERRNO:
if (ferror(stdin))
LOG(ERROR) << "error reading stdin\n";
if (ferror(stdout))
LOG(ERROR) << "error writing stdout\n";
break;
case Z_STREAM_ERROR:
LOG(ERROR) << "invalid compression level\n";
break;
case Z_DATA_ERROR:
LOG(ERROR) << "invalid or incomplete deflate data\n";
break;
case Z_MEM_ERROR:
LOG(ERROR) << "out of memory\n";
break;
case Z_VERSION_ERROR:
LOG(ERROR) << "zlib version mismatch!\n";
break;
}
}
#endif // _DEBUG
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
int ArchiveProcessor::ProcessEntireStream(MemoryReadStream *stream) {
int result = Z_OK;
bool has_error = false;
// decompress until deflate stream ends or error
do {
int remaining = stream->GetRemainingByteCount();
int process_this_time = remaining < kChunkSize ? remaining : kChunkSize;
result = ProcessCompressedBytes(stream, process_this_time);
has_error = (result != Z_OK && result != Z_STREAM_END);
#ifdef _DEBUG
if (has_error) {
zerr(result);
}
#endif
} while (result != Z_STREAM_END && !has_error);
if (result == Z_STREAM_END) {
// if we got to the end of stream, then we're good...
result = Z_OK;
}
return result;
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
int ArchiveProcessor::ProcessFile(const char *filename) {
struct stat file_info;
int result = stat(filename, &file_info);
if (result != 0) return -1;
int file_length = file_info.st_size;
if (file_length == 0) return -1;
MemoryBuffer<uint8> buffer;
buffer.Allocate(file_length);
uint8 *p = buffer;
// Test by reading in a tar.gz file and sending through the
// progressive streaming system
FILE *fp = fopen(filename, "rb");
if (!fp) return -1; // can't open file!
fread(p, sizeof(uint8), file_length, fp);
fclose(fp);
MemoryReadStream stream(p, file_length);
result = ProcessEntireStream(&stream);
if (result == Z_STREAM_END) {
// if we got to the end of stream, then we're good...
result = Z_OK;
}
return result;
}
} // namespace o3d
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