coreboot-kgpe-d16/payloads/bayou/util/pbuilder/lzma/minilzma.cc

318 lines
8.6 KiB
C++

/*
* minimal lzma implementation
*
* Copyright (C) 2002 Eric Biederman
* Copyright (C) 2005 Joel Yliluoma
* Copyright (C) 2007 coresystems GmbH
* (Adapted by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
* Copyright (C) 2007 Patrick Georgi <patrick@georgi-clan.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include "C/Common/MyInitGuid.h"
#include "C/7zip/Compress/LZMA/LZMAEncoder.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <vector>
#include <algorithm>
#include <stdint.h>
const std::vector<unsigned char> LZMACompress
(const std::vector<unsigned char>& buf);
const std::vector<unsigned char> LZMADeCompress
(const std::vector<unsigned char>& buf);
static inline uint16_t R16(const void* p)
{
const unsigned char* data = (const unsigned char*)p;
return (data[0] << 0) | (data[1] << 8);
}
static inline uint32_t R32(const void* p)
{
const unsigned char* data = (const unsigned char*)p;
return R16(data) | (R16(data+2) << 16);
}
#define L (uint64_t)
static inline uint64_t R64(const void* p)
{
const unsigned char* data = (const unsigned char*)p;
return (L R32(data)) | ((L R32(data+4)) << 32);
}
#undef L
static UInt32 SelectDictionarySizeFor(unsigned datasize)
{
#if 1
return datasize;
#else
#ifdef __GNUC__
/* gnu c can optimize this switch statement into a fast binary
* search, but it cannot do so for the list of the if statements.
*/
switch(datasize)
{
case 0 ... 512 : return 512;
case 513 ... 1024: return 2048;
case 1025 ... 4096: return 8192;
case 4097 ... 16384: return 32768;
case 16385 ... 65536: return 528288;
case 65537 ... 528288: return 1048576*4;
case 528289 ... 786432: return 1048576*16;
default: return 1048576*32;
}
#else
if(datasize <= 512) return 512;
if(datasize <= 1024) return 1024;
if(datasize <= 4096) return 4096;
if(datasize <= 16384) return 32768;
if(datasize <= 65536) return 528288;
if(datasize <= 528288) return 1048576*4;
if(datasize <= 786432) reutrn 1048576*16;
return 32*1048576;
#endif
#endif
}
class CInStreamRam: public ISequentialInStream, public CMyUnknownImp
{
const std::vector<unsigned char>& input;
size_t Pos;
public:
MY_UNKNOWN_IMP
CInStreamRam(const std::vector<unsigned char>& buf) : input(buf), Pos(0)
{
}
virtual ~CInStreamRam() {}
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
};
STDMETHODIMP CInStreamRam::Read(void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 remain = input.size() - Pos;
if (size > remain) size = remain;
std::memcpy(data, &input[Pos], size);
Pos += size;
if(processedSize != NULL) *processedSize = size;
return S_OK;
}
class COutStreamRam: public ISequentialOutStream, public CMyUnknownImp
{
std::vector<Byte> result;
size_t Pos;
public:
MY_UNKNOWN_IMP
COutStreamRam(): result(), Pos(0) { }
virtual ~COutStreamRam() { }
void Reserve(unsigned n) { result.reserve(n); }
const std::vector<Byte>& Get() const { return result; }
HRESULT WriteByte(Byte b)
{
if(Pos >= result.size()) result.resize(Pos+1);
result[Pos++] = b;
return S_OK;
}
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
};
STDMETHODIMP COutStreamRam::Write(const void *data, UInt32 size, UInt32 *processedSize)
{
if(Pos+size > result.size()) result.resize(Pos+size);
std::memcpy(&result[Pos], data, size);
if(processedSize != NULL) *processedSize = size;
Pos += size;
return S_OK;
}
const std::vector<unsigned char> LZMACompress(const std::vector<unsigned char>& buf)
{
if(buf.empty()) return buf;
const UInt32 dictionarysize = SelectDictionarySizeFor(buf.size());
NCompress::NLZMA::CEncoder *encoderSpec = new NCompress::NLZMA::CEncoder;
CMyComPtr<ICompressCoder> encoder = encoderSpec;
const PROPID propIDs[] =
{
NCoderPropID::kAlgorithm,
NCoderPropID::kDictionarySize,
NCoderPropID::kNumFastBytes,
};
const unsigned kNumProps = sizeof(propIDs) / sizeof(propIDs[0]);
PROPVARIANT properties[kNumProps];
properties[0].vt = VT_UI4; properties[0].ulVal = (UInt32)2;
properties[1].vt = VT_UI4; properties[1].ulVal = (UInt32)dictionarysize;
properties[2].vt = VT_UI4; properties[2].ulVal = (UInt32)64;
if (encoderSpec->SetCoderProperties(propIDs, properties, kNumProps) != S_OK)
{
Error:
return std::vector<unsigned char> ();
}
COutStreamRam *const outStreamSpec = new COutStreamRam;
CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
CInStreamRam *const inStreamSpec = new CInStreamRam(buf);
CMyComPtr<ISequentialInStream> inStream = inStreamSpec;
outStreamSpec->Reserve(buf.size());
if (encoderSpec->WriteCoderProperties(outStream) != S_OK) goto Error;
for (unsigned i = 0; i < 8; i++)
{
UInt64 t = (UInt64)buf.size();
outStreamSpec->WriteByte((Byte)((t) >> (8 * i)));
}
HRESULT lzmaResult = encoder->Code(inStream, outStream, 0, 0, 0);
if (lzmaResult != S_OK) goto Error;
return outStreamSpec->Get();
}
#undef RC_NORMALIZE
#include "C/7zip/Decompress/LzmaDecode.h"
#include "C/7zip/Decompress/LzmaDecode.c"
const std::vector<unsigned char> LZMADeCompress
(const std::vector<unsigned char>& buf)
{
if(buf.size() <= 5+8) return std::vector<unsigned char> ();
uint_least64_t out_sizemax = R64(&buf[5]);
std::vector<unsigned char> result(out_sizemax);
CLzmaDecoderState state;
LzmaDecodeProperties(&state.Properties, &buf[0], LZMA_PROPERTIES_SIZE);
state.Probs = new CProb[LzmaGetNumProbs(&state.Properties)];
SizeT in_done;
SizeT out_done;
LzmaDecode(&state, &buf[13], buf.size()-13, &in_done,
&result[0], result.size(), &out_done);
delete[] state.Probs;
result.resize(out_done);
return result;
}
#ifndef COMPACT
int main(int argc, char *argv[])
{
char *s;
FILE *f, *infile, *outfile;
int c;
if (argc != 4) {
std::fprintf(stderr, "'lzma e file1 file2' encodes file1 into file2.\n"
"'lzma d file2 file1' decodes file2 into file1.\n");
return EXIT_FAILURE;
}
if (argc == 4) {
if ((s = argv[1], s[1] || strpbrk(s, "DEde") == NULL)
|| (s = argv[2], (infile = fopen(s, "rb")) == NULL)
|| (s = argv[3], (outfile = fopen(s, "wb")) == NULL)) {
std::fprintf(stderr, "??? %s\n", s);
return EXIT_FAILURE;
}
}
struct stat fs;
int si;
if (fstat(fileno(infile), &fs)) {
std::perror(strerror(errno));
return EXIT_FAILURE;
}
si=fs.st_size;
char *Buf=(char *)malloc(si);
fread(Buf,si, 1, infile);
std::vector<unsigned char> result;
if (toupper(*argv[1]) == 'E')
result = LZMACompress(std::vector<unsigned char>(Buf,Buf+si));
else
result = LZMADeCompress(std::vector<unsigned char>(Buf,Buf+si));
fwrite(&result[0], result.size(), 1, outfile);
fclose(infile);
fclose(outfile);
return EXIT_SUCCESS;
}
#else
extern "C" {
/**
* Compress a buffer with lzma
* Don't copy the result back if it is too large.
* @param in a pointer to the buffer
* @param in_len the length in bytes
* @param out a pointer to a buffer of at least size in_len
* @param out_len a pointer to the compressed length of in
*/
void do_lzma_compress(char *in, int in_len, char *out, int *out_len) {
std::vector<unsigned char> result;
result = LZMACompress(std::vector<unsigned char>(in, in + in_len));
*out_len = result.size();
if (*out_len < in_len)
std::memcpy(out, &result[0], *out_len);
}
void do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len) {
std::vector<unsigned char> result;
result = LZMADeCompress(std::vector<unsigned char>(src, src + src_len));
if (result.size() <= dst_len)
std::memcpy(dst, &result[0], result.size());
else
{
fprintf(stderr, "Not copying %d bytes to %d-byte buffer!\n",
result.size(), dst_len);
exit(1);
}
}
}
#endif