corda/src/lzma-decode.cpp
Joel Dice a1e9315fa2 fix LZMA/bootimage build
This includes some tweaks to README.md and makefile to ensure the
directions in the former for building a bootimage actually work.
2014-07-28 09:19:39 -06:00

67 lines
1.6 KiB
C++

/* Copyright (c) 2008-2014, Avian Contributors
Permission to use, copy, modify, and/or distribute this software
for any purpose with or without fee is hereby granted, provided
that the above copyright notice and this permission notice appear
in all copies.
There is NO WARRANTY for this software. See license.txt for
details. */
#include "avian/lzma-util.h"
#include "C/LzmaDec.h"
using namespace vm;
namespace {
int32_t read4(const uint8_t* in)
{
return (static_cast<int32_t>(in[3]) << 24)
| (static_cast<int32_t>(in[2]) << 16)
| (static_cast<int32_t>(in[1]) << 8) | (static_cast<int32_t>(in[0]));
}
} // namespace
namespace vm {
uint8_t* decodeLZMA(System* s,
avian::util::Alloc* a,
uint8_t* in,
unsigned inSize,
unsigned* outSize)
{
const unsigned PropHeaderSize = 5;
const unsigned HeaderSize = 13;
int32_t outSize32 = read4(in + PropHeaderSize);
expect(s, outSize32 >= 0);
SizeT outSizeT = outSize32;
uint8_t* out = static_cast<uint8_t*>(a->allocate(outSize32));
SizeT inSizeT = inSize;
LzmaAllocator allocator(a);
ELzmaStatus status;
int result = LzmaDecode(out,
&outSizeT,
in + HeaderSize,
&inSizeT,
in,
PropHeaderSize,
LZMA_FINISH_END,
&status,
&(allocator.allocator));
expect(s, result == SZ_OK);
expect(s, status == LZMA_STATUS_FINISHED_WITH_MARK);
*outSize = outSize32;
return out;
}
} // namespace vm