campo-sirio/al/examples/ex16con.cpp

//
// EX16CON.CPP
//
//  C++/DOS Example program for ArchiveLib 2.0
//
//  Copyright (c) Greenleaf Software, Inc. 1994 - 1996
//  All Rights Reserved
//
// MEMBERS/FUNCTIONS DEMONSTRATED
//
//   ALEntry::~ALEntry()
//   ALEntry::ClearMark()
//   ALEntry::CompressionRatio()
//   ALEntry::GetCrc32()
//   ALEntry::SetMarkState()
//   ALStatus::GetStatusDetail()
//   ALStatus::GetStatusString()
//
// DESCRIPTION
//
//  This example is a grab-bag, designed to highlight a bunch of barely
//  related functions.  So don't look for any sort of intelligence at
//  work here, you won't find it.  The program first creates a whole
//  bunch of ALMemory objects, initializing them with a bunch of fixed
//  data so that they compress fairly well.  It then does a bunch of
//  manipulation of the memory objects in their list, deleting some,
//  changing the compression engine of others, and clearing the marks
//  of even more.  Finally, it creates the archive, then displays the
//  list for your viewing pleasure.
//
//
// REVISION HISTORY
//
//  February 1, 1996  2.0A  : Second release
//

#include <iostream.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <iomanip.h>
#include <conio.h>

#include "arclib.h"
#include "pkarc.h"
#include "glarc.h"
#include "glengn.h"
#include "pkengn.h"
#include "bargraph.h"
#include "memstore.h"
#include "copyengn.h"

main()
{
    cout << "Archive Library 2.0\nEX16CON.CPP\n\n";
    cout << "This example is a grab-bag, designed to highlight a bunch of barely\n";
    cout << "related functions.  So don't look for any sort of intelligence at\n";
    cout << "work here, you won't find it.  The program first creates a whole\n";
    cout << "bunch of ALMemory objects, initializing them with a bunch of fixed\n";
    cout << "data so that they compress fairly well.  It then does a bunch of\n";
    cout << "manipulation of the memory objects in their list, deleting some,\n";
    cout << "changing the compression engine of others, and clearing the marks\n";
    cout << "of even more.  Finally, it creates the archive, then displays the\n";
    cout << "list for your viewing pleasure.\n\n";
    getch();

    char temp[ 128 ];
    ALBarGraph monitor( AL_MONITOR_JOB );

#if defined( ZIP )
    ALPkArchive archive( "dos16.zip" );
#else
    ALGlArchive archive( "dos16.gal" );
#endif
    ALEntryList list( &monitor );
//
// The first step is to create 24 ALMemory objects.  Each one has the
// contents of the temp buffer written out to it, with the temp buffer
// being just a little different every time.  As each object is created,
// I add it to the list, along with a new copy of the greenleaf engine.
//
    memset( temp, 'A', 128 );
    for ( int i = 0 ; i < 24  ; i++ ) {
        char name[ 20 ];
        sprintf( name, "Buffer %02d", i );
        ALStorage *obj = new ALMemory( name );
        obj->Create();
        memset( temp + i, i, i );
        obj->WriteBuffer( (unsigned char *) temp, 128 );
        obj->Close();
#if defined( ZIP )
        new ALEntry( list, obj, new ALPkCompressor, new ALPkDecompressor );
#else
        new ALEntry( list, obj, new ALGlCompressor, new ALGlDecompressor  );
#endif
    }
//
// Now for fun, I am going to delete every third entry in list
//
    ALEntry *entry = list.GetFirstEntry();
    for ( ; entry != 0 ; ) {
        ALEntry *next_entry = entry->GetNextEntry();
        delete entry;
        entry = next_entry->GetNextEntry();
        if ( entry )
            entry = entry->GetNextEntry();
    }
//
// Now, for more fun, I am going to change the compression engine in every
// third entry.
//
    entry = list.GetFirstEntry();
    for ( ; entry != 0 ; ) {
        if ( entry->mpCompressor->miCompressionType !=
#if defined( ZIP )
             AL_COMPRESSION_DEFLATE ) {
#else
             AL_COMPRESSION_GREENLEAF ) {
#endif
            cout << "Unknown engine type!\n";
            exit( 1 );
        }
        delete entry->mpCompressor;
        entry->mpCompressor = new ALCopyCompressor;
        entry->SetComment( "No compression here" );
        entry = entry->GetNextEntry();
        if ( entry )
            entry = entry->GetNextEntry();
        if ( entry )
            entry = entry->GetNextEntry();
    }
//
// Now, for the last bit of fun, I unmark every other entry
//
    entry = list.GetFirstEntry();
    for ( ; entry != 0 ; ) {
        entry->ClearMark();
        entry = entry->GetNextEntry();
        if ( entry ) {
            entry->SetMarkState( 1 );
            entry = entry->GetNextEntry();
        }
    }
//
// Having done all that, it is time to create the archive, then print
// out the list, along with the CRC and compression ratio for all
// the entries.
//
    int status = archive.Create( list );
    cout << "Archive status: " << archive.mStatus << endl;
    cout << "\nList status:\n\n";
    if ( status >= 0 ) {
        for ( entry = list.GetFirstEntry() ;
              entry ;
              entry = entry->GetNextEntry() ) {
            cout << entry->mpStorageObject->mName
                 << " :  ";
            if ( entry->GetMark() ) {
                cout << entry->CompressionRatio()
                     << "%  ";
                (void) cout.width( 8 );
                cout << hex
                     << entry->GetCrc32()
                     << dec
                     << "\n";
            } else {
                cout << "Not marked\n";
            }
        }
    }
    cout << "\n";
    cout << "List code:   " << (int) list.mStatus << "\n";
    cout << "List string: " << list.mStatus.GetStatusString() << "\n";
    cout << "List detail: " << list.mStatus.GetStatusDetail() << "\n";
    return status;
}