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Original file line number | Diff line number | Diff line change |
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include(FindPackageHandleStandardArgs) | ||
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find_path(BROTLI_INCLUDE_DIR "brotli/decode.h") | ||
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find_library(BROTLICOMMON_LIBRARY NAMES brotlicommon) | ||
find_library(BROTLIDEC_LIBRARY NAMES brotlidec) | ||
find_library(BROTLIENC_LIBRARY NAMES brotlienc) | ||
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find_package_handle_standard_args(Brotli | ||
FOUND_VAR | ||
BROTLI_FOUND | ||
REQUIRED_VARS | ||
BROTLIDEC_LIBRARY | ||
BROTLICOMMON_LIBRARY | ||
BROTLI_INCLUDE_DIR | ||
FAIL_MESSAGE | ||
"Could NOT find Brotli" | ||
) | ||
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set(BROTLI_INCLUDE_DIRS ${BROTLI_INCLUDE_DIR}) | ||
set(BROTLI_LIBRARIES ${BROTLIDEC_LIBRARY} ${BROTLIENC_LIBRARY} ${BROTLICOMMON_LIBRARY}) |
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Original file line number | Diff line number | Diff line change |
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#pragma once | ||
#include <string> | ||
#include <string_view> | ||
#include <array> | ||
#include <sstream> | ||
#include <brotli/decode.h> | ||
#include <brotli/encode.h> | ||
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namespace cinatra::br_codec { | ||
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#define BROTLI_BUFFER_SIZE 1024 | ||
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bool brotli_compress(std::string_view input, std::string &output) | ||
{ | ||
auto instance = BrotliEncoderCreateInstance(nullptr, nullptr, nullptr); | ||
std::array<uint8_t, BROTLI_BUFFER_SIZE> buffer; | ||
std::stringstream result; | ||
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size_t available_in = input.size(), available_out = buffer.size(); | ||
const uint8_t* next_in = reinterpret_cast<const uint8_t*>(input.data()); | ||
uint8_t* next_out = buffer.data(); | ||
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do | ||
{ | ||
int ret = BrotliEncoderCompressStream | ||
( | ||
instance, BROTLI_OPERATION_FINISH, | ||
&available_in, &next_in, &available_out, &next_out, nullptr | ||
); | ||
if (!ret) | ||
return false; | ||
result.write(reinterpret_cast<const char*>(buffer.data()), buffer.size() - available_out); | ||
available_out = buffer.size(); | ||
next_out = buffer.data(); | ||
} | ||
while (!(available_in == 0 && BrotliEncoderIsFinished(instance))); | ||
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BrotliEncoderDestroyInstance(instance); | ||
output = result.str(); | ||
return true; | ||
} | ||
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bool brotli_decompress(std::string_view input, std::string &decompressed) | ||
{ | ||
if (input.size() == 0) | ||
return false; | ||
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size_t available_in = input.size(); | ||
auto next_in = (const uint8_t *)(input.data()); | ||
decompressed = std::string(available_in * 3, 0); | ||
size_t available_out = decompressed.size(); | ||
auto next_out = (uint8_t *)(decompressed.data()); | ||
size_t total_out{0}; | ||
bool done = false; | ||
auto s = BrotliDecoderCreateInstance(nullptr, nullptr, nullptr); | ||
while (!done) { | ||
auto result = BrotliDecoderDecompressStream( | ||
s, &available_in, &next_in, &available_out, &next_out, &total_out); | ||
if (result == BROTLI_DECODER_RESULT_SUCCESS) { | ||
decompressed.resize(total_out); | ||
BrotliDecoderDestroyInstance(s); | ||
return true; | ||
} | ||
else if (result == BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT) { | ||
if (total_out != decompressed.size()) { | ||
return false; | ||
} | ||
decompressed.resize(total_out * 2); | ||
next_out = (uint8_t *)(decompressed.data() + total_out); | ||
available_out = total_out; | ||
} | ||
else { | ||
decompressed.resize(0); | ||
BrotliDecoderDestroyInstance(s); | ||
return true; | ||
} | ||
} | ||
return true; | ||
} | ||
} | ||
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// namespace cinatra::br_codec |
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