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#include <iostream>
#include <string>
#include <fcntl.h>
#include <unistd.h>
#include <lzsscomprs.h>
#ifndef O_BINARY
#define O_BINARY 0
#endif
using namespace std;
typedef struct {
short versionRecordSize;
short publisherID;
short bookID;
short setID;
char conversionProgramVerMajor;
char conversionProgramVerMinor;
char leastCompatSTEPVerMajor;
char leastCompatSTEPVerMinor;
char encryptionType;
char editionID;
short modifiedBy;
} Version;
typedef struct {
short viewableHeaderRecordSize;
long viewableBlocksCount; // this is listed as nonGlossBlocksCount in spec!
long glossBlocksCount;
char compressionType; // 0 - none; 1 - LZSS
char reserved1;
short blockEntriesSize;
short reserved2;
} ViewableHeader;
typedef struct {
long offset;
long uncompressedSize;
long size;
} ViewableBlock;
void readVersion(int fd, Version *versionRecord);
void readHeaderControlWordAreaText(int fd, char **buf);
void readViewableHeader(int fd, ViewableHeader *viewableHeaderRecord);
void readViewableBlock(int fd, ViewableBlock *vb);
void readViewableBlockText(int fd, ViewableBlock *vb, char **buf);
SWCompress *compress = 0;
int main(int argc, char **argv) {
compress = new LZSSCompress();
char *buf;
Version versionRecord;
ViewableHeader viewableHeaderRecord;
if (argc < 2) {
cerr << "usage: "<< *argv << " <database to step module>\n";
exit (-1);
}
string bookpath = argv[1];
string fileName;
if ((argv[1][strlen(argv[1])-1] != '/') &&
(argv[1][strlen(argv[1])-1] != '\\'))
bookpath += "/";
fileName = bookpath + "Book.dat";
int fd = open(fileName.c_str(), O_RDONLY|O_BINARY);
if (fd < 1) {
cerr << "error, couldn't open file: " << fileName << "\n";
exit (-2);
}
readVersion(fd, &versionRecord);
readHeaderControlWordAreaText(fd, &buf);
delete [] buf;
fileName = bookpath + "Viewable.idx";
int fdv = open(fileName.c_str(), O_RDONLY|O_BINARY);
if (fdv < 1) {
cerr << "error, couldn't open file: " << fileName << "\n";
exit (-3);
}
readVersion(fdv, &versionRecord);
readViewableHeader(fdv, &viewableHeaderRecord);
ViewableBlock vb;
cout << "\n\nReading special preface viewable BLOCK 0";
readViewableBlock(fdv, &vb);
readViewableBlockText(fd, &vb, &buf);
delete [] buf;
int nonGlossBlocksCount = viewableHeaderRecord.viewableBlocksCount
- viewableHeaderRecord.glossBlocksCount;
cout << "\n\nReading " << nonGlossBlocksCount << " non-glossary viewable blocks";
// 1 because we already read the first block above
for (int i = 1; i < nonGlossBlocksCount; i++) {
cout << "\nNon-Glossary viewable block: " << i;
readViewableBlock(fdv, &vb);
readViewableBlockText(fd, &vb, &buf);
delete [] buf;
}
cout << "\n\nReading " << viewableHeaderRecord.glossBlocksCount << " glossary viewable blocks";
for (int i = 0; i < viewableHeaderRecord.glossBlocksCount; i++) {
cout << "\nGlossary viewable block: " << i;
readViewableBlock(fdv, &vb);
readViewableBlockText(fd, &vb, &buf);
delete [] buf;
}
close(fdv);
close(fd);
}
void readVersion(int fd, Version *versionRecord) {
cout << "\n\nReading Version Record (" << 16/*sizeof(struct Version)*/ << " bytes)\n\n";
// DO NOT USE BECAUSE OF RECORD BYTE ALIGNMENT PROBLEMS
// read(fd, &versionRecord, sizeof(struct Version));
cout << "Version Record Information\n";
read(fd, &(versionRecord->versionRecordSize), 2);
cout << "\tversionRecordSize: " << versionRecord->versionRecordSize << "\n";
read(fd, &(versionRecord->publisherID), 2);
cout << "\tpublisherID: " << versionRecord->publisherID << "\n";
read(fd, &(versionRecord->bookID), 2);
cout << "\tbookID: " << versionRecord->bookID << "\n";
read(fd, &(versionRecord->setID), 2);
cout << "\tsetID: " << versionRecord->setID << "\n";
read(fd, &(versionRecord->conversionProgramVerMajor), 1);
cout << "\tconversionProgramVerMajor: " << (int)versionRecord->conversionProgramVerMajor << "\n";
read(fd, &(versionRecord->conversionProgramVerMinor), 1);
cout << "\tconversionProgramVerMinor: " << (int)versionRecord->conversionProgramVerMinor << "\n";
read(fd, &(versionRecord->leastCompatSTEPVerMajor), 1);
cout << "\tleastCompatSTEPVerMajor: " << (int)versionRecord->leastCompatSTEPVerMajor << "\n";
read(fd, &(versionRecord->leastCompatSTEPVerMinor), 1);
cout << "\tleastCompatSTEPVerMinor: " << (int)versionRecord->leastCompatSTEPVerMinor << "\n";
read(fd, &(versionRecord->encryptionType), 1);
cout << "\tencryptionType: " << (int)versionRecord->encryptionType << "\n";
read(fd, &(versionRecord->editionID), 1);
cout << "\teditionID: " << (int)versionRecord->editionID << "\n";
read(fd, &(versionRecord->modifiedBy), 2);
cout << "\tmodifiedBy: " << versionRecord->modifiedBy << "\n";
int skip = versionRecord->versionRecordSize - 16/*sizeof(struct Version*/;
if (skip) {
cout << "\nSkipping " << skip << " unknown bytes.\n";
char skipbuf[skip];
read(fd, skipbuf, skip);
}
}
void readViewableHeader(int fd, ViewableHeader *viewableHeaderRecord) {
cout << "\n\nReading Viewable Header Record (" << 16/*sizeof(struct ViewableHeader)*/ << " bytes)\n\n";
// DO NOT USE BECAUSE OF RECORD BYTE ALIGNMENT PROBLEMS
// read(fd, &viewableHeaderRecord, sizeof(struct ViewableHeader));
cout << "Viewable Header Record Information\n";
read(fd, &(viewableHeaderRecord->viewableHeaderRecordSize), 2);
cout << "\tviewableHeaderRecordSize: " << viewableHeaderRecord->viewableHeaderRecordSize << "\n";
read(fd, &(viewableHeaderRecord->viewableBlocksCount), 4);
cout << "\tviewableBlocksCount: " << viewableHeaderRecord->viewableBlocksCount << "\n";
read(fd, &(viewableHeaderRecord->glossBlocksCount), 4);
cout << "\tglossBlocksCount: " << viewableHeaderRecord->glossBlocksCount << "\n";
read(fd, &(viewableHeaderRecord->compressionType), 1);
cout << "\tcompressionType: " << (int)viewableHeaderRecord->compressionType << "(0 - none; 1 - LZSS)\n";
read(fd, &(viewableHeaderRecord->reserved1), 1);
cout << "\treserved1: " << (int)viewableHeaderRecord->reserved1 << "\n";
read(fd, &(viewableHeaderRecord->blockEntriesSize), 2);
cout << "\tblockEntriesSize: " << viewableHeaderRecord->blockEntriesSize << "\n";
read(fd, &(viewableHeaderRecord->reserved2), 2);
cout << "\treserved2: " << viewableHeaderRecord->reserved2 << "\n";
int skip = viewableHeaderRecord->viewableHeaderRecordSize - 16/*sizeof(struct ViewableHeader)*/;
if (skip) {
cout << "\nSkipping " << skip << " unknown bytes.\n";
char skipbuf[skip];
read(fd, skipbuf, skip);
}
}
void readViewableBlockText(int fd, ViewableBlock *vb, char **buf) {
unsigned long size = vb->size;
*buf = new char [ ((vb->size > vb->uncompressedSize) ? vb->size : vb->uncompressedSize) + 1 ];
lseek(fd, vb->offset, SEEK_SET);
read(fd, *buf, vb->size);
compress->zBuf(&size, *buf);
strcpy(*buf, compress->Buf());
cout << "Viewable Block Text:\n";
cout << *buf << "\n\n";
}
void readViewableBlock(int fd, ViewableBlock *vb) {
cout << "\n\nReading Viewable Block (" << 12/*sizeof(struct ViewableHeader)*/ << " bytes)\n\n";
// DO NOT USE BECAUSE OF RECORD BYTE ALIGNMENT PROBLEMS
// read(fd, &vb, sizeof(struct ViewableBlock));
cout << "Viewable Block Information\n";
read(fd, &(vb->offset), 4);
cout << "\toffset: " << vb->offset << "\n";
read(fd, &(vb->uncompressedSize), 4);
cout << "\tuncompressedSize: " << vb->uncompressedSize << "\n";
read(fd, &(vb->size), 4);
cout << "\tsize: " << vb->size << "\n";
}
void readHeaderControlWordAreaText(int fd, char **buf) {
long headerControlWordAreaSize;
read(fd, &headerControlWordAreaSize, 4);
cout << "Reading Header Control Word Area (" << headerControlWordAreaSize << " bytes)\n\n";
*buf = new char [headerControlWordAreaSize + 1];
read(fd, *buf, headerControlWordAreaSize);
(*buf)[headerControlWordAreaSize] = 0;
cout << "headerControlWordArea:\n" << *buf << "\n";
}
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