+/**************************************************************************
+ *
+ * Copyright 2011 Zack Rusin
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
#include "trace_file.hpp"
+#include "trace_snappyfile.hpp"
+
#include <assert.h>
#include <string.h>
#include <zlib.h>
-#include <snappy.h>
+
+#include "os.hpp"
#include <iostream>
using namespace Trace;
-#define SNAPPY_BYTE1 'a'
-#define SNAPPY_BYTE2 't'
File::File(const std::string &filename,
File::Mode mode)
- : m_filename(filename),
- m_mode(mode),
+ : m_mode(mode),
m_isOpened(false)
{
- if (!m_filename.empty()) {
- open(m_filename, m_mode);
+ if (!filename.empty()) {
+ open(filename, m_mode);
}
}
-
File::~File()
{
close();
}
-bool File::isOpened() const
-{
- return m_isOpened;
-}
-
-File::Mode File::mode() const
-{
- return m_mode;
-}
-
-std::string File::filename() const
-{
- return m_filename;
-}
-
-bool File::open(const std::string &filename, File::Mode mode)
-{
- if (m_isOpened) {
- close();
- }
- m_isOpened = rawOpen(filename, mode);
- m_mode = mode;
- return m_isOpened;
-}
-
-bool File::write(const void *buffer, int length)
-{
- if (!m_isOpened || m_mode != File::Write) {
- return false;
- }
- return rawWrite(buffer, length);
-}
-
-bool File::read(void *buffer, int length)
-{
- if (!m_isOpened || m_mode != File::Read) {
- return false;
- }
- return rawRead(buffer, length);
-}
-
-void File::close()
-{
- if (m_isOpened) {
- rawClose();
- m_isOpened = false;
- }
-}
-
-void File::flush()
-{
- rawFlush();
-}
-int File::getc()
+void File::setCurrentOffset(const File::Offset &offset)
{
- if (!m_isOpened || m_mode != File::Read) {
- return 0;
- }
- return rawGetc();
+ assert(0);
}
bool File::isZLibCompressed(const std::string &filename)
return (byte1 == SNAPPY_BYTE1 && byte2 == SNAPPY_BYTE2);
}
+typedef struct gz_stream {
+ z_stream stream;
+ int z_err; /* error code for last stream operation */
+ int z_eof; /* set if end of input file */
+ FILE *file; /* .gz file */
+} gz_dummy_stream;
ZLibFile::ZLibFile(const std::string &filename,
File::Mode mode)
{
m_gzFile = gzopen(filename.c_str(),
(mode == File::Write) ? "wb" : "rb");
+
+ if (mode == File::Read && m_gzFile) {
+ //XXX: unfortunately zlib doesn't support
+ // SEEK_END or we could've done:
+ //m_endOffset = gzseek(m_gzFile, 0, SEEK_END);
+ //gzrewind(m_gzFile);
+ gz_dummy_stream *stream = (gz_dummy_stream *)m_gzFile;
+ long loc = ftell(stream->file);
+ fseek(stream->file,0,SEEK_END);
+ m_endOffset = ftell(stream->file);
+ fseek(stream->file, loc, SEEK_SET);
+ }
+
return m_gzFile != NULL;
}
-bool ZLibFile::rawWrite(const void *buffer, int length)
+bool ZLibFile::rawWrite(const void *buffer, size_t length)
{
return gzwrite(m_gzFile, buffer, length) != -1;
}
-bool ZLibFile::rawRead(void *buffer, int length)
+bool ZLibFile::rawRead(void *buffer, size_t length)
{
return gzread(m_gzFile, buffer, length) != -1;
}
gzflush(m_gzFile, Z_SYNC_FLUSH);
}
-SnappyFile::SnappyFile(const std::string &filename,
- File::Mode mode)
- : File(),
- m_cache(0),
- m_cachePtr(0),
- m_cacheSize(0)
+File::Offset ZLibFile::currentOffset()
{
- m_compressedCache = new char[SNAPPY_CHUNK_SIZE];
+ return File::Offset(gztell(m_gzFile));
}
-SnappyFile::~SnappyFile()
+bool ZLibFile::supportsOffsets() const
{
- delete [] m_compressedCache;
+ return false;
}
-bool SnappyFile::rawOpen(const std::string &filename, File::Mode mode)
+bool ZLibFile::rawSkip(size_t)
{
- std::ios_base::openmode fmode = std::fstream::binary;
- if (mode == File::Write) {
- fmode |= (std::fstream::out | std::fstream::trunc);
- createCache(SNAPPY_CHUNK_SIZE);
- } else if (mode == File::Read) {
- fmode |= std::fstream::in;
- }
-
- m_stream.open(filename.c_str(), fmode);
-
- //read in the initial buffer if we're reading
- if (m_stream.is_open() && mode == File::Read) {
- // read the snappy file identifier
- unsigned char byte1, byte2;
- m_stream >> byte1;
- m_stream >> byte2;
- assert(byte1 == SNAPPY_BYTE1 && byte2 == SNAPPY_BYTE2);
-
- flushCache();
- } else if (m_stream.is_open() && mode == File::Write) {
- // write the snappy file identifier
- m_stream << SNAPPY_BYTE1;
- m_stream << SNAPPY_BYTE2;
- }
- return m_stream.is_open();
-}
-
-bool SnappyFile::rawWrite(const void *buffer, int length)
-{
- if (freeCacheSize() > length) {
- memcpy(m_cachePtr, buffer, length);
- m_cachePtr += length;
- } else if (freeCacheSize() == length) {
- memcpy(m_cachePtr, buffer, length);
- m_cachePtr += length;
- flushCache();
- } else {
- int sizeToWrite = length;
-
- while (sizeToWrite >= freeCacheSize()) {
- int endSize = freeCacheSize();
- int offset = length - sizeToWrite;
- memcpy(m_cachePtr, (char*)buffer + offset, endSize);
- sizeToWrite -= endSize;
- m_cachePtr += endSize;
- flushCache();
- }
- if (sizeToWrite) {
- int offset = length - sizeToWrite;
- memcpy(m_cachePtr, (char*)buffer + offset, sizeToWrite);
- m_cachePtr += sizeToWrite;
- }
- }
-
- return true;
-}
-
-bool SnappyFile::rawRead(void *buffer, int length)
-{
- if (m_stream.eof()) {
- return false;
- }
- if (freeCacheSize() > length) {
- memcpy(buffer, m_cachePtr, length);
- m_cachePtr += length;
- } else if (freeCacheSize() == length) {
- memcpy(buffer, m_cachePtr, length);
- m_cachePtr += length;
- flushCache();
- } else {
- int sizeToRead = length;
- int offset = 0;
- while (sizeToRead) {
- int chunkSize = std::min(freeCacheSize(), sizeToRead);
- offset = length - sizeToRead;
- memcpy((char*)buffer + offset, m_cachePtr, chunkSize);
- m_cachePtr += chunkSize;
- sizeToRead -= chunkSize;
- if (sizeToRead > 0)
- flushCache();
- }
- }
-
- return true;
-}
-
-int SnappyFile::rawGetc()
-{
- int c = 0;
- if (!rawRead(&c, 1))
- return -1;
- return c;
-}
-
-void SnappyFile::rawClose()
-{
- flushCache();
- m_stream.close();
- delete [] m_cache;
- m_cache = NULL;
- m_cachePtr = NULL;
-}
-
-void SnappyFile::rawFlush()
-{
- m_stream.flush();
-}
-
-void SnappyFile::flushCache()
-{
- if (m_mode == File::Write) {
- size_t compressedLength;
-
- ::snappy::RawCompress(m_cache, SNAPPY_CHUNK_SIZE - freeCacheSize(),
- m_compressedCache, &compressedLength);
-
- m_stream << compressedLength;
- m_stream.write(m_compressedCache, compressedLength);
- m_cachePtr = m_cache;
- } else if (m_mode == File::Read) {
- if (m_stream.eof())
- return;
- //assert(m_cachePtr == m_cache + m_cacheSize);
- size_t compressedLength;
- m_stream >> compressedLength;
- m_stream.read((char*)m_compressedCache, compressedLength);
- ::snappy::GetUncompressedLength(m_compressedCache, compressedLength,
- &m_cacheSize);
- if (m_cache)
- delete [] m_cache;
- createCache(m_cacheSize);
- ::snappy::RawUncompress(m_compressedCache, compressedLength,
- m_cache);
- }
+ return false;
}
-void SnappyFile::createCache(size_t size)
+int ZLibFile::rawPercentRead()
{
- m_cache = new char[size];
- m_cachePtr = m_cache;
- m_cacheSize = size;
+ gz_dummy_stream *stream = (gz_dummy_stream *)m_gzFile;
+ return 100 * (ftell(stream->file) / m_endOffset);
}
projects / apitrace / blobdiff