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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
commit | cca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch) | |
tree | 146f39ded1c938019e1ed42d30923c2ac9e86789 /src/io/stream/gzipstream.h | |
parent | Initial commit. (diff) | |
download | inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.tar.xz inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.zip |
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/io/stream/gzipstream.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/io/stream/gzipstream.h b/src/io/stream/gzipstream.h new file mode 100644 index 0000000..202b3a1 --- /dev/null +++ b/src/io/stream/gzipstream.h @@ -0,0 +1,120 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#ifndef SEEN_INKSCAPE_IO_GZIPSTREAM_H +#define SEEN_INKSCAPE_IO_GZIPSTREAM_H +/** + * @file + * Zlib-enabled input and output streams. + * + * This is a thin wrapper of libz calls, in order + * to provide a simple interface to our developers + * for gzip input and output. + */ +/* + * Authors: + * Bob Jamison <rjamison@titan.com> + * + * Copyright (C) 2004 Inkscape.org + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <vector> +#include "inkscapestream.h" +#include <zlib.h> + +namespace Inkscape +{ +namespace IO +{ + +//######################################################################### +//# G Z I P I N P U T S T R E A M +//######################################################################### + +/** + * This class is for deflating a gzip-compressed InputStream source + * + */ +class GzipInputStream : public BasicInputStream +{ + +public: + + GzipInputStream(InputStream &sourceStream); + + ~GzipInputStream() override; + + int available() override; + + void close() override; + + int get() override; + +private: + + bool load(); + int fetchMore(); + + bool loaded; + + unsigned char *outputBuf; + unsigned char *srcBuf; + + unsigned long crc; + unsigned long srcCrc; + unsigned long srcSiz; + unsigned long srcLen; + long outputBufPos; + long outputBufLen; + + z_stream d_stream; +}; // class GzipInputStream + + + + +//######################################################################### +//# G Z I P O U T P U T S T R E A M +//######################################################################### + +/** + * This class is for gzip-compressing data going to the + * destination OutputStream + * + */ +class GzipOutputStream : public BasicOutputStream +{ + +public: + + GzipOutputStream(OutputStream &destinationStream); + + ~GzipOutputStream() override; + + void close() override; + + void flush() override; + + int put(char ch) override; + +private: + + std::vector<unsigned char> inputBuf; + + long totalIn; + long totalOut; + unsigned long crc; + +}; // class GzipOutputStream + + + + + + + +} // namespace IO +} // namespace Inkscape + + +#endif /* __INKSCAPE_IO_GZIPSTREAM_H__ */ |