1 /**************************************************************************
3 * Copyright 2011 Zack Rusin
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 **************************************************************************/
27 #include "trace_file.hpp"
29 #include "trace_snappyfile.hpp"
40 using namespace Trace;
43 File::File(const std::string &filename,
48 if (!filename.empty()) {
49 open(filename, m_mode);
58 bool File::isZLibCompressed(const std::string &filename)
60 std::fstream stream(filename.c_str(),
61 std::fstream::binary | std::fstream::in);
62 if (!stream.is_open())
65 unsigned char byte1, byte2;
70 return (byte1 == 0x1f && byte2 == 0x8b);
74 bool File::isSnappyCompressed(const std::string &filename)
76 std::fstream stream(filename.c_str(),
77 std::fstream::binary | std::fstream::in);
78 if (!stream.is_open())
81 unsigned char byte1, byte2;
86 return (byte1 == SNAPPY_BYTE1 && byte2 == SNAPPY_BYTE2);
90 ZLibFile::ZLibFile(const std::string &filename,
92 : File(filename, mode),
101 bool ZLibFile::rawOpen(const std::string &filename, File::Mode mode)
103 m_gzFile = gzopen(filename.c_str(),
104 (mode == File::Write) ? "wb" : "rb");
105 return m_gzFile != NULL;
108 bool ZLibFile::rawWrite(const void *buffer, size_t length)
110 return gzwrite(m_gzFile, buffer, length) != -1;
113 bool ZLibFile::rawRead(void *buffer, size_t length)
115 return gzread(m_gzFile, buffer, length) != -1;
118 int ZLibFile::rawGetc()
120 return gzgetc(m_gzFile);
123 void ZLibFile::rawClose()
131 void ZLibFile::rawFlush()
133 gzflush(m_gzFile, Z_SYNC_FLUSH);