mirror of
https://github.com/ultimatepp/ultimatepp.git
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103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
/*
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7zMain.c
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LZMA SDK 4.26 Copyright (c) 1999-2005 Igor Pavlov (2005-08-02)
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*/
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#include "Install.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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extern "C" {
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#include "7zCrc.h"
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#include "7zIn.h"
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#include "7zExtract.h"
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};
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struct CMemInStream {
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ISzInStream InStream;
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const char *ptr;
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size_t pos, len;
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};
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SZ_RESULT SzMemReadImp(void *object, void *buffer, size_t size, size_t *processedSize)
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{
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CMemInStream *s = (CMemInStream *)object;
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LOG("Read: " << size << ", pos: " << s->pos << ", len: " << s->len);
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int ps = min(s->len - s->pos, size);
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memcpy(buffer, s->ptr + s->pos, ps);
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s->pos += ps;
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if(processedSize)
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*processedSize = ps;
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return SZ_OK;
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}
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SZ_RESULT SzMemSeekImp(void *object, CFileSize p)
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{
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LOG("Seek: " << p);
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CMemInStream *s = (CMemInStream *)object;
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if(p >= 0 && p <= s->len) {
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s->pos = p;
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return SZ_OK;
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}
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return SZE_FAIL;
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}
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void LZMAExtract(const char *ptr, int len, const char *outdir, Gate2<int, int> progress)
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{
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CArchiveDatabaseEx db;
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SZ_RESULT res;
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ISzAlloc allocImp;
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ISzAlloc allocTempImp;
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CMemInStream archiveStream;
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archiveStream.InStream.Read = SzMemReadImp;
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archiveStream.InStream.Seek = SzMemSeekImp;
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archiveStream.ptr = ptr;
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archiveStream.pos = 0;
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archiveStream.len = len;
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allocImp.Alloc = SzAlloc;
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allocImp.Free = SzFree;
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allocTempImp.Alloc = SzAllocTemp;
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allocTempImp.Free = SzFreeTemp;
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InitCrcTable();
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SzArDbExInit(&db);
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res = SzArchiveOpen(&archiveStream.InStream, &db, &allocImp, &allocTempImp);
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if(res != SZ_OK)
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Error();
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UInt32 blockIndex = 0xFFFFFFFF; // it can have any value before first call (if outBuffer = 0)
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Byte *outBuffer = 0; // it must be 0 before first call for each new archive.
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size_t outBufferSize = 0; // it can have any value before first call (if outBuffer = 0)
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for(dword i = 0; i < db.Database.NumFiles; i++) {
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if(progress(i, db.Database.NumFiles))
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Error("Installation aborted by user");
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size_t offset;
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size_t outSizeProcessed;
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CFileItem *f = db.Database.Files + i;
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String fn = AppendFileName(outdir, f->Name);
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RealizeDirectory(GetFileFolder(fn));
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if(!f->IsDirectory) {
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res = SzExtract(&archiveStream.InStream, &db, i,
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&blockIndex, &outBuffer, &outBufferSize,
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&offset, &outSizeProcessed,
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&allocImp, &allocTempImp);
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if(res != SZ_OK)
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if (res == SZE_OUTOFMEMORY)
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Error("Not enough memory");
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else
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Error();
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String fn = AppendFileName(outdir, f->Name);
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FileAppend f(fn);
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f.Put(outBuffer + offset, outSizeProcessed);
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if(f.IsError())
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Error("Unable to write output file(s)");
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}
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}
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allocImp.Free(outBuffer);
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SzArDbExFree(&db, allocImp.Free);
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}
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