From 823740e1ffa2b3bd39f8dea8062f5c5a0d9c741b Mon Sep 17 00:00:00 2001 From: Daniel Wilhelm Date: Thu, 20 Apr 2017 16:55:28 -0600 Subject: normalize most lineendings --- wx+/zlib_wrap.h | 228 ++++++++++++++++++++++++++++---------------------------- 1 file changed, 114 insertions(+), 114 deletions(-) (limited to 'wx+/zlib_wrap.h') diff --git a/wx+/zlib_wrap.h b/wx+/zlib_wrap.h index 11d8227b..ae2e6d0e 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 - - -namespace zen -{ -class ZlibInternalError {}; - -// compression level must be between 0 and 9: -// 0: no compression -// 9: best compression -template //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 -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 -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(&uncompressedSize), - reinterpret_cast(&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 -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(&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(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(uncompressedSize)); //throw ZlibInternalError - if (bytesWritten != static_cast(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 + + +namespace zen +{ +class ZlibInternalError {}; + +// compression level must be between 0 and 9: +// 0: no compression +// 9: best compression +template //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 +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 +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(&uncompressedSize), + reinterpret_cast(&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 +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(&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(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(uncompressedSize)); //throw ZlibInternalError + if (bytesWritten != static_cast(uncompressedSize)) + throw ZlibInternalError(); + } + return contOut; +} +} + +#endif //ZLIB_WRAP_H_428597064566 -- cgit