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authorDaniel Wilhelm <shieldwed@outlook.com>2017-02-13 21:25:04 -0700
committerDaniel Wilhelm <shieldwed@outlook.com>2017-02-13 21:25:04 -0700
commit9d071d2a2cec9a7662a02669488569a017f0ea35 (patch)
treec83a623fbdff098339b66d21ea2e81f3f67344ae /wx+/zlib_wrap.h
parent8.8 (diff)
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8.9
Diffstat (limited to 'wx+/zlib_wrap.h')
-rwxr-xr-x[-rw-r--r--]wx+/zlib_wrap.h228
1 files changed, 114 insertions, 114 deletions
diff --git a/wx+/zlib_wrap.h b/wx+/zlib_wrap.h
index 0e596f85..11d8227b 100644..100755
--- a/wx+/zlib_wrap.h
+++ b/wx+/zlib_wrap.h
@@ -1,114 +1,114 @@
-// *****************************************************************************
-// * This file is part of the FreeFileSync project. It is distributed under *
-// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 *
-// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
-// *****************************************************************************
-
-#ifndef ZLIB_WRAP_H_428597064566
-#define ZLIB_WRAP_H_428597064566
-
-#include <zen/serialize.h>
-
-
-namespace zen
-{
-class ZlibInternalError {};
-
-// compression level must be between 0 and 9:
-// 0: no compression
-// 9: best compression
-template <class BinContainer> //as specified in serialize.h
-BinContainer compress(const BinContainer& stream, int level); //throw ZlibInternalError
-//caveat: output stream is physically larger than input! => strip additional reserved space if needed: "BinContainer(output.begin(), output.end())"
-
-template <class BinContainer>
-BinContainer decompress(const BinContainer& stream); //throw ZlibInternalError
-
-
-
-
-
-
-
-
-
-
-
-//######################## implementation ##########################
-namespace impl
-{
-size_t zlib_compressBound(size_t len);
-size_t zlib_compress (const void* src, size_t srcLen, void* trg, size_t trgLen, int level); //throw ZlibInternalError
-size_t zlib_decompress(const void* src, size_t srcLen, void* trg, size_t trgLen); //throw ZlibInternalError
-}
-
-
-template <class BinContainer>
-BinContainer compress(const BinContainer& stream, int level) //throw ZlibInternalError
-{
- BinContainer contOut;
- if (!stream.empty()) //don't dereference iterator into empty container!
- {
- //save uncompressed stream size for decompression
- const std::uint64_t uncompressedSize = stream.size(); //use portable number type!
- contOut.resize(sizeof(uncompressedSize));
- std::copy(reinterpret_cast<const char*>(&uncompressedSize),
- reinterpret_cast<const char*>(&uncompressedSize) + sizeof(uncompressedSize),
- &*contOut.begin());
-
- const size_t bufferEstimate = impl::zlib_compressBound(stream.size()); //upper limit for buffer size, larger than input size!!!
-
- contOut.resize(contOut.size() + bufferEstimate);
-
- const size_t bytesWritten = impl::zlib_compress(&*stream.begin(),
- stream.size(),
- &*contOut.begin() + contOut.size() - bufferEstimate,
- bufferEstimate,
- level); //throw ZlibInternalError
- if (bytesWritten < bufferEstimate)
- contOut.resize(contOut.size() - (bufferEstimate - bytesWritten)); //caveat: unsigned arithmetics
- //caveat: physical memory consumption still *unchanged*!
- }
- return contOut;
-}
-
-
-template <class BinContainer>
-BinContainer decompress(const BinContainer& stream) //throw ZlibInternalError
-{
- BinContainer contOut;
- if (!stream.empty()) //don't dereference iterator into empty container!
- {
- //retrieve size of uncompressed data
- std::uint64_t uncompressedSize = 0; //use portable number type!
- if (stream.size() < sizeof(uncompressedSize))
- throw ZlibInternalError();
- std::copy(&*stream.begin(),
- &*stream.begin() + sizeof(uncompressedSize),
- reinterpret_cast<char*>(&uncompressedSize));
- //attention: contOut MUST NOT be empty! Else it will pass a nullptr to zlib_decompress() => Z_STREAM_ERROR although "uncompressedSize == 0"!!!
- //secondary bug: don't dereference iterator into empty container!
- if (uncompressedSize == 0) //cannot be 0: compress() directly maps empty -> empty container skipping zlib!
- throw ZlibInternalError();
-
- try
- {
- contOut.resize(static_cast<size_t>(uncompressedSize)); //throw std::bad_alloc
- }
- catch (std::bad_alloc&) //most likely due to data corruption!
- {
- throw ZlibInternalError();
- }
-
- const size_t bytesWritten = impl::zlib_decompress(&*stream.begin() + sizeof(uncompressedSize),
- stream.size() - sizeof(uncompressedSize),
- &*contOut.begin(),
- static_cast<size_t>(uncompressedSize)); //throw ZlibInternalError
- if (bytesWritten != static_cast<size_t>(uncompressedSize))
- throw ZlibInternalError();
- }
- return contOut;
-}
-}
-
-#endif //ZLIB_WRAP_H_428597064566
+// *****************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 *
+// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
+// *****************************************************************************
+
+#ifndef ZLIB_WRAP_H_428597064566
+#define ZLIB_WRAP_H_428597064566
+
+#include <zen/serialize.h>
+
+
+namespace zen
+{
+class ZlibInternalError {};
+
+// compression level must be between 0 and 9:
+// 0: no compression
+// 9: best compression
+template <class BinContainer> //as specified in serialize.h
+BinContainer compress(const BinContainer& stream, int level); //throw ZlibInternalError
+//caveat: output stream is physically larger than input! => strip additional reserved space if needed: "BinContainer(output.begin(), output.end())"
+
+template <class BinContainer>
+BinContainer decompress(const BinContainer& stream); //throw ZlibInternalError
+
+
+
+
+
+
+
+
+
+
+
+//######################## implementation ##########################
+namespace impl
+{
+size_t zlib_compressBound(size_t len);
+size_t zlib_compress (const void* src, size_t srcLen, void* trg, size_t trgLen, int level); //throw ZlibInternalError
+size_t zlib_decompress(const void* src, size_t srcLen, void* trg, size_t trgLen); //throw ZlibInternalError
+}
+
+
+template <class BinContainer>
+BinContainer compress(const BinContainer& stream, int level) //throw ZlibInternalError
+{
+ BinContainer contOut;
+ if (!stream.empty()) //don't dereference iterator into empty container!
+ {
+ //save uncompressed stream size for decompression
+ const uint64_t uncompressedSize = stream.size(); //use portable number type!
+ contOut.resize(sizeof(uncompressedSize));
+ std::copy(reinterpret_cast<const char*>(&uncompressedSize),
+ reinterpret_cast<const char*>(&uncompressedSize) + sizeof(uncompressedSize),
+ &*contOut.begin());
+
+ const size_t bufferEstimate = impl::zlib_compressBound(stream.size()); //upper limit for buffer size, larger than input size!!!
+
+ contOut.resize(contOut.size() + bufferEstimate);
+
+ const size_t bytesWritten = impl::zlib_compress(&*stream.begin(),
+ stream.size(),
+ &*contOut.begin() + contOut.size() - bufferEstimate,
+ bufferEstimate,
+ level); //throw ZlibInternalError
+ if (bytesWritten < bufferEstimate)
+ contOut.resize(contOut.size() - (bufferEstimate - bytesWritten)); //caveat: unsigned arithmetics
+ //caveat: physical memory consumption still *unchanged*!
+ }
+ return contOut;
+}
+
+
+template <class BinContainer>
+BinContainer decompress(const BinContainer& stream) //throw ZlibInternalError
+{
+ BinContainer contOut;
+ if (!stream.empty()) //don't dereference iterator into empty container!
+ {
+ //retrieve size of uncompressed data
+ uint64_t uncompressedSize = 0; //use portable number type!
+ if (stream.size() < sizeof(uncompressedSize))
+ throw ZlibInternalError();
+ std::copy(&*stream.begin(),
+ &*stream.begin() + sizeof(uncompressedSize),
+ reinterpret_cast<char*>(&uncompressedSize));
+ //attention: contOut MUST NOT be empty! Else it will pass a nullptr to zlib_decompress() => Z_STREAM_ERROR although "uncompressedSize == 0"!!!
+ //secondary bug: don't dereference iterator into empty container!
+ if (uncompressedSize == 0) //cannot be 0: compress() directly maps empty -> empty container skipping zlib!
+ throw ZlibInternalError();
+
+ try
+ {
+ contOut.resize(static_cast<size_t>(uncompressedSize)); //throw std::bad_alloc
+ }
+ catch (std::bad_alloc&) //most likely due to data corruption!
+ {
+ throw ZlibInternalError();
+ }
+
+ const size_t bytesWritten = impl::zlib_decompress(&*stream.begin() + sizeof(uncompressedSize),
+ stream.size() - sizeof(uncompressedSize),
+ &*contOut.begin(),
+ static_cast<size_t>(uncompressedSize)); //throw ZlibInternalError
+ if (bytesWritten != static_cast<size_t>(uncompressedSize))
+ throw ZlibInternalError();
+ }
+ return contOut;
+}
+}
+
+#endif //ZLIB_WRAP_H_428597064566
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