X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=trace_file.cpp;h=e20685812c5c6230c9e6f582f7ea2441bf5dfede;hb=f736a6252b691d8f10403a25a686360868b32e50;hp=74cc3829e2b4ce5a18a3d69beb614e90b87ed6de;hpb=ce04047159832b49f55618d76478ef264cbee462;p=apitrace diff --git a/trace_file.cpp b/trace_file.cpp index 74cc382..e206858 100644 --- a/trace_file.cpp +++ b/trace_file.cpp @@ -1,63 +1,44 @@ +/************************************************************************** + * + * 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 #include #include -#include #include "os.hpp" #include -#include using namespace Trace; -#define SNAPPY_BYTE1 'a' -#define SNAPPY_BYTE2 't' - -static void cleanupHandler(int sig); - -class FileCleanup -{ -public: - FileCleanup() - { - OS::CatchInterrupts(cleanupHandler); - } - - ~FileCleanup() - { - flush(); - m_files.clear(); - } - - void addFile(Trace::File *file) - { - m_files.insert(file); - } - void removeFile(Trace::File *file) - { - m_files.erase(file); - } - - void flush() - { - std::set::const_iterator itr; - for (itr = m_files.begin(); itr != m_files.end(); ++itr) { - (*itr)->flush(File::FlushDeep); - } - } - -private: - std::set m_files; -}; -static FileCleanup s_cleaner; - -static void cleanupHandler(int sig) -{ - s_cleaner.flush(); -} File::File(const std::string &filename, File::Mode mode) @@ -70,79 +51,11 @@ File::File(const std::string &filename, } } - 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; - - if (m_isOpened) { - s_cleaner.addFile(this); - } - 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; - s_cleaner.removeFile(this); - } -} - -void File::flush(FlushType type) -{ - rawFlush(type); -} - -int File::getc() -{ - if (!m_isOpened || m_mode != File::Read) { - return 0; - } - return rawGetc(); -} - bool File::isZLibCompressed(const std::string &filename) { std::fstream stream(filename.c_str(), @@ -216,172 +129,7 @@ void ZLibFile::rawClose() } } -void ZLibFile::rawFlush(FlushType type) +void ZLibFile::rawFlush() { 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) -{ - m_compressedCache = new char[SNAPPY_CHUNK_SIZE]; -} - -SnappyFile::~SnappyFile() -{ - delete [] m_compressedCache; -} - -bool SnappyFile::rawOpen(const std::string &filename, File::Mode mode) -{ - 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(); - if (!m_cacheSize) - break; - } - } - - 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(FlushType type) -{ - if (type == FlushDeep) { - flushCache(); - } - 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); - } -} - -void SnappyFile::createCache(size_t size) -{ - m_cache = new char[size]; - m_cachePtr = m_cache; - m_cacheSize = size; -}