source: icGREP/icgrep-devel/icgrep/lz4_decoder.cpp @ 6136

Last change on this file since 6136 was 6136, checked in by xwa163, 11 months ago
  1. Cleanup legacy slow LZ4 related kernels
  2. Rename lz4d_ext_dep to lz4_decompression
  3. Rename LZ4 AIO related kernels to LZ4 Decompression Kernel
File size: 2.7 KB
Line 
1/*
2 *  Copyright (c) 2017 International Characters.
3 *  This software is licensed to the public under the Open Software License 3.0.
4 *  icgrep is a trademark of International Characters.
5 */
6
7
8#include <llvm/IR/Module.h>
9#include <llvm/Linker/Linker.h>
10#include <llvm/Support/PrettyStackTrace.h>
11#include <llvm/Support/Signals.h>
12#include <llvm/Support/ManagedStatic.h>
13#include <IR_Gen/idisa_target.h>
14#include <boost/filesystem.hpp>
15#include <boost/iostreams/device/mapped_file.hpp>
16
17#include <lz4FrameDecoder.h>
18#include <cc/cc_compiler.h>
19#include <toolchain/toolchain.h>
20#include <kernels/cc_kernel.h>
21#include <kernels/streamset.h>
22#include <kernels/s2p_kernel.h>
23#include <kernels/kernel_builder.h>
24#include <toolchain/cpudriver.h>
25#include <llvm/Support/raw_ostream.h>
26#include <iostream>
27#include <lz4/LZ4Generator.h>
28
29namespace re { class CC; }
30
31using namespace llvm;
32using namespace parabix;
33using namespace kernel;
34
35static cl::OptionCategory lz4dFlags("Command Flags", "lz4d options");
36static cl::opt<std::string> inputFile(cl::Positional, cl::desc("<input file>"), cl::Required, cl::cat(lz4dFlags));
37static cl::opt<std::string> outputFile(cl::Positional, cl::desc("<output file>"), cl::Required, cl::cat(lz4dFlags));
38static cl::opt<bool> overwriteOutput("f", cl::desc("Overwrite existing output file."), cl::init(false), cl::cat(lz4dFlags));
39
40int main(int argc, char *argv[]) {
41    // This boilerplate provides convenient stack traces and clean LLVM exit
42    // handling. It also initializes the built in support for convenient
43    // command line option handling.
44    sys::PrintStackTraceOnErrorSignal(argv[0]);
45    llvm::PrettyStackTraceProgram X(argc, argv);
46    llvm_shutdown_obj shutdown;
47    codegen::ParseCommandLineOptions(argc, argv, {&lz4dFlags, codegen::codegen_flags()});
48    std::string fileName = inputFile;
49    LZ4FrameDecoder lz4Frame(fileName);
50    if (!lz4Frame.isValid()) {
51        llvm::errs() << "Invalid LZ4 file.\n";
52        return -1;
53    }
54
55    if (boost::filesystem::exists(outputFile)) {
56        if (overwriteOutput) {
57            boost::filesystem::remove(outputFile);
58        } else {
59            llvm::errs() << outputFile + " existed. Use -f argument to overwrite.\n";
60            return -1;
61        }
62    }
63
64    boost::iostreams::mapped_file_source mappedFile;
65    mappedFile.open(fileName, lz4Frame.getBlocksLength() + lz4Frame.getBlocksStart());
66    char *fileBuffer = const_cast<char *>(mappedFile.data());
67
68    LZ4Generator g;
69    g.generateDecompressionPipeline(outputFile);
70
71    auto main = g.getMainFunc();
72    main(fileBuffer, lz4Frame.getBlocksStart(), lz4Frame.getBlocksStart() + lz4Frame.getBlocksLength(), lz4Frame.hasBlockChecksum());
73    mappedFile.close();
74
75    return 0;
76}
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