diff options
Diffstat (limited to 'NorthstarDedicatedTest/include/zlib/gzip')
-rw-r--r-- | NorthstarDedicatedTest/include/zlib/gzip/compress.hpp | 113 | ||||
-rw-r--r-- | NorthstarDedicatedTest/include/zlib/gzip/config.hpp | 5 | ||||
-rw-r--r-- | NorthstarDedicatedTest/include/zlib/gzip/version.hpp | 16 |
3 files changed, 0 insertions, 134 deletions
diff --git a/NorthstarDedicatedTest/include/zlib/gzip/compress.hpp b/NorthstarDedicatedTest/include/zlib/gzip/compress.hpp deleted file mode 100644 index c7da9447..00000000 --- a/NorthstarDedicatedTest/include/zlib/gzip/compress.hpp +++ /dev/null @@ -1,113 +0,0 @@ -#include <zlib/gzip/config.hpp> - -// zlib -#include <zlib.h> - -// std -#include <limits> -#include <stdexcept> -#include <string> - -namespace gzip { - -class Compressor -{ - std::size_t max_; - int level_; - - public: - Compressor(int level = Z_DEFAULT_COMPRESSION, - std::size_t max_bytes = 2000000000) // by default refuse operation if uncompressed data is > 2GB - : max_(max_bytes), - level_(level) - { - } - - template <typename InputType> - void compress(InputType& output, - const char* data, - std::size_t size) const - { - -#ifdef DEBUG - // Verify if size input will fit into unsigned int, type used for zlib's avail_in - if (size > std::numeric_limits<unsigned int>::max()) - { - throw std::runtime_error("size arg is too large to fit into unsigned int type"); - } -#endif - if (size > max_) - { - throw std::runtime_error("size may use more memory than intended when decompressing"); - } - - z_stream deflate_s; - deflate_s.zalloc = Z_NULL; - deflate_s.zfree = Z_NULL; - deflate_s.opaque = Z_NULL; - deflate_s.avail_in = 0; - deflate_s.next_in = Z_NULL; - - // The windowBits parameter is the base two logarithm of the window size (the size of the history buffer). - // It should be in the range 8..15 for this version of the library. - // Larger values of this parameter result in better compression at the expense of memory usage. - // This range of values also changes the decoding type: - // -8 to -15 for raw deflate - // 8 to 15 for zlib - // (8 to 15) + 16 for gzip - // (8 to 15) + 32 to automatically detect gzip/zlib header (decompression/inflate only) - constexpr int window_bits = 15 + 16; // gzip with windowbits of 15 - - constexpr int mem_level = 8; - // The memory requirements for deflate are (in bytes): - // (1 << (window_bits+2)) + (1 << (mem_level+9)) - // with a default value of 8 for mem_level and our window_bits of 15 - // this is 128Kb - -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wold-style-cast" - if (deflateInit2(&deflate_s, level_, Z_DEFLATED, window_bits, mem_level, Z_DEFAULT_STRATEGY) != Z_OK) - { - throw std::runtime_error("deflate init failed"); - } -#pragma GCC diagnostic pop - - deflate_s.next_in = reinterpret_cast<z_const Bytef*>(data); - deflate_s.avail_in = static_cast<unsigned int>(size); - - std::size_t size_compressed = 0; - do - { - size_t increase = size / 2 + 1024; - if (output.size() < (size_compressed + increase)) - { - output.resize(size_compressed + increase); - } - // There is no way we see that "increase" would not fit in an unsigned int, - // hence we use static cast here to avoid -Wshorten-64-to-32 error - deflate_s.avail_out = static_cast<unsigned int>(increase); - deflate_s.next_out = reinterpret_cast<Bytef*>((&output[0] + size_compressed)); - // From http://www.zlib.net/zlib_how.html - // "deflate() has a return value that can indicate errors, yet we do not check it here. - // Why not? Well, it turns out that deflate() can do no wrong here." - // Basically only possible error is from deflateInit not working properly - deflate(&deflate_s, Z_FINISH); - size_compressed += (increase - deflate_s.avail_out); - } while (deflate_s.avail_out == 0); - - deflateEnd(&deflate_s); - output.resize(size_compressed); - } -}; - -inline std::string compress(const char* data, - std::size_t size, - int level = Z_DEFAULT_COMPRESSION) -{ - Compressor comp(level); - std::string output; - comp.compress(output, data, size); - return output; -} - -} // namespace gzip diff --git a/NorthstarDedicatedTest/include/zlib/gzip/config.hpp b/NorthstarDedicatedTest/include/zlib/gzip/config.hpp deleted file mode 100644 index 21f34a0b..00000000 --- a/NorthstarDedicatedTest/include/zlib/gzip/config.hpp +++ /dev/null @@ -1,5 +0,0 @@ -#pragma once - -#ifndef ZLIB_CONST -#define ZLIB_CONST -#endif
\ No newline at end of file diff --git a/NorthstarDedicatedTest/include/zlib/gzip/version.hpp b/NorthstarDedicatedTest/include/zlib/gzip/version.hpp deleted file mode 100644 index 47af692e..00000000 --- a/NorthstarDedicatedTest/include/zlib/gzip/version.hpp +++ /dev/null @@ -1,16 +0,0 @@ -#pragma once - -/// The major version number -#define GZIP_VERSION_MAJOR 1 - -/// The minor version number -#define GZIP_VERSION_MINOR 0 - -/// The patch number -#define GZIP_VERSION_PATCH 0 - -/// The complete version number -#define GZIP_VERSION_CODE (GZIP_VERSION_MAJOR * 10000 + GZIP_VERSION_MINOR * 100 + GZIP_VERSION_PATCH) - -/// Version number as string -#define GZIP_VERSION_STRING "1.0.0"
\ No newline at end of file |