//
// WILDOS2.CPP
//
//  Source file for ArchiveLib 2.0
//
//  Copyright (c) Greenleaf Software, Inc. 1994-1996
//  All Rights Reserved
//
// CONTENTS
//
//  ALWildCardExpander::ConstructOsData()
//  ALWildCardExpander::DestroyOsData()
//  ALWildCardExpander::GetNextFile()
//
// DESCRIPTION
//
//  This file contains the OS specific routines need to expand
//  wild card file names.  Different versions of these three functions
//  exist for DOS, Win95, and OS/2.
//
// REVISION HISTORY
//
//   February 14, 1996  2.0A : New release
//

#include "arclib.h"
#if !defined( AL_IBM )
#pragma hdrstop
#endif

#define INCL_DOSFILEMGR
#include <os2.h>

#include "wildcard.h"

struct ALWildCardOsData {  /* Tag internal class */
    HDIR mHandle;
};

//
// NAME
//
//  ALWildCardExpander::ConstructOsData()
//
// PLATFORMS/ENVIRONMENTS
//
//  OS/2
//  C++
//
// SHORT DESCRIPTION
//
//  Allocate space for a wildcard search under the OS/2 file system.
//
// C++ SYNOPSIS
//
//  #include "arclib.h"
//  #include "wildcard
//
//  void ALWildCardExpander::ConstructOsData();
//
// C SYNOPSIS
//
//  No C translation for this internal protected function.
//
// VB SYNOPSIS
//
//  No VB translation for this internal protected function.
//
// DELPHI SYNOPSIS
//
//  No Delphi translation for this internal protected function.
//
// ARGUMENTS
//
//  None.
//
// DESCRIPTION
//
//  The process of wild card file expansion differs drastically for
//  all the different environments we support.  Since each system
//  is going to have different data requirements, we don't try to
//  allocate any specialized data in the base class.  Instead, we just keep a
//  pointer to the data, and allocate it in this member function.  Different
//  versions of this member function show up in different directories, and the
//  BUILD.INI file directs the compiler as to which to include.
//
//  This module supports the OS/2 file system.  The OS/2 wild card
//  expansion state is stored in an HDIR handle.  We allocate that
//  structure here, and store a pointer to it in the mpOsData member
//  of the ALWildCardExpander structure.  Note that the HDIR data
//  isn't initialized yet, we have just allocated some space for it.
//
// RETURNS
//
//  Nothing.
//
// EXAMPLE
//
// SEE ALSO
//
// REVISION HISTORY
//
//   February 14, 1996  2.0A : New release.
//

void AL_PROTO
ALWildCardExpander::ConstructOsData()  /* Tag protected function */
{
    mpOsData = new ALWildCardOsData;
    if ( mpOsData )
        mpOsData->mHandle = 0xffffffff;
}

//
// NAME
//
//  ALWildCardExpander::DestroyOsData()
//
// PLATFORMS/ENVIRONMENTS
//
//  OS/2
//  C++
//
// SHORT DESCRIPTION
//
//  Destroy the space allocated for the wildcard search under OS/2.
//
// C++ SYNOPSIS
//
//  #include "arclib.h"
//  #include "wildcard
//
//  void ALWildCardExpander::DestroyOsData();
//
// C SYNOPSIS
//
//  No C translation for this internal protected function.
//
// VB SYNOPSIS
//
//  No VB translation for this internal protected function.
//
// DELPHI SYNOPSIS
//
//  No Delphi translation for this internal protected function.
//
// ARGUMENTS
//
//  None.
//
// DESCRIPTION
//
//  The process of wild card file expansion differs drastically for
//  all the different environments we support.  Since each system
//  is going to have different data requirements, we don't try to
//  allocate system-specific data in the base class.  Instead, we just keep a
//  pointer to the data, and allocate it in the member function
//  ConstructOsData().
//
//  If we are constructing something when the search starts, it makes sense
//  that we need to destroy it when the search is over.  That's what this
//  guy does.
//
// RETURNS
//
//  Nothing.
//
// EXAMPLE
//
// SEE ALSO
//
// REVISION HISTORY
//
//   February 14, 1996  2.0A : New release.
//

void AL_PROTO
ALWildCardExpander::DestroyOsData()  /* Tag protected function */
{
    if ( mpOsData != 0 ) {
        if ( mpOsData->mHandle != 0xffffffff )
            DosFindClose( mpOsData->mHandle );
        delete mpOsData;
    }
    mpOsData = 0;
}

//
// NAME
//
//  ALWildCardExpander::GetNextFile()
//
// PLATFORMS/ENVIRONMENTS
//
//  OS/2
//  C++  C
//
// SHORT DESCRIPTION
//
//  Search for an additional file in the wildcard expansion.
//
// C++ SYNOPSIS
//
//  #include "arclib.h"
//  #include "wildcard.h"
//
//  char *ALWildCardExpander::GetNextFile();
//
// C SYNOPSIS
//
//  #include "arclib.h"
//  #include "wildcard.h"
//
//  char * ALExpanderGetNextFile( hALExpander this_object );
//
// VB SYNOPSIS
//
//  None, at least not for OS/2.
//
// DELPHI SYNOPSIS
//
//  None, at least not for OS/2.
//
// ARGUMENTS
//
//  this_object  :  A reference or pointer to the ALWildCardExpander that
//                  is performing the expansion.  Note that the C++ member
//                  version of this call doesn't have an explicit argument
//                  here, since it has access to 'this' implicitly.
//
// DESCRIPTION
//
//  The ALWildCardExpander has what amounts to six different internal
//  states.  They are:
//
//              Searching subdirectories, using another object
//
//              Extracting the next wild spec from the input line
//
//              Expanding the wild card to get the first matching file
//
//              Expanding the wild card to get the next matching file
//
//              Looking for the first subdirectory
//
//              Looking for the next subdirectory
//
//  For the most part, we keep track of the state using the mState
//  variable.  However, we keep track of whether we are searching
//  subdirectories by examining the pointer to the next expander.  If
//  it is non-null, it means we are in that state.
//
// RETURNS
//
//  In the event that this routine is able to come up with a new
//  file name, it returns a character pointer to the name, which
//  is kept in member variable mResultFileName.  If no new file
//  name could be cooked up, we return a 0, which means you are
//  done.
//
// EXAMPLE
//
// SEE ALSO
//
// REVISION HISTORY
//
//   February 14, 1996  2.0A : New release.
//

char AL_DLL_FAR * AL_PROTO
ALWildCardExpander::GetNextFile()  /* Tag public function */
{
    FILEFINDBUF3 buffer = { 0 };
    ULONG count;

    if ( mpOsData == 0 )
        return 0;
    for ( ; ; ) {
        if ( mpNextExpander ) {
            char *p = mpNextExpander->GetNextFile();
            if ( p )
                return p;
            delete mpNextExpander;
            mpNextExpander = 0;
        }
        switch ( mState ) {
            case GET_NEXT_WILD_NAME :
                if ( GetNextWildName() == 0 )
                    return 0;
                mWildPathOnly = mFullWildName;
                mWildPathOnly.StripFileName();
                mWildNameOnly = mFullWildName;
                mWildNameOnly.StripPath();
                mState = GET_FIRST_FILE_NAME;
                break;
            case GET_FIRST_FILE_NAME :
                if ( mpOsData->mHandle != 0xffffffff ) {
                    DosFindClose( mpOsData->mHandle );
                    mpOsData->mHandle = 0xffffffff;
                }
                count = 1;
                if ( DosFindFirst( (PSZ) (char *) mFullWildName,
                                   &mpOsData->mHandle,
                                   FILE_READONLY,
                                   (PVOID) &buffer,
                                   sizeof( buffer ),
                                   &count,
                                   FIL_STANDARD ) || count == 0 ) { //Don't want to exclude RO files
                    if ( miTraverseFlag )
                        mState = GET_FIRST_DIRECTORY;
                    else
                        mState = GET_NEXT_WILD_NAME;
                    break;
                }
                mState = GET_NEXT_FILE_NAME;
                mResultFileName = ALName( mWildPathOnly + buffer.achName );
                return mResultFileName;
            case GET_NEXT_FILE_NAME :
                count = 1;
                if ( DosFindNext( mpOsData->mHandle,
                                  (PVOID) &buffer,
                                  sizeof( buffer ),
                                  &count ) || count == 0 ) {
                    if ( miTraverseFlag )
                        mState = GET_FIRST_DIRECTORY;
                    else
                        mState = GET_NEXT_WILD_NAME;
                    break;
                }
                mResultFileName = mWildPathOnly + buffer.achName;
                return mResultFileName;
            case GET_FIRST_DIRECTORY :
                count = 1;
                if ( mpOsData->mHandle != 0xffffffff ) {
                    DosFindClose( mpOsData->mHandle );
                    mpOsData->mHandle = 0xffffffff;
                }
                if ( DosFindFirst( (PSZ)(char *)( mWildPathOnly + "*.*" ),
                                   &mpOsData->mHandle,
                                   MUST_HAVE_DIRECTORY,
                                   (PVOID) &buffer,
                                   sizeof( buffer ),
                                   &count,
                                   FIL_STANDARD ) || count == 0 ) { //Don't want to exclude RO files
                    mState = GET_NEXT_WILD_NAME;
                    break;
                }
                mState = GET_NEXT_DIRECTORY;
                if ( strcmp( buffer.achName, ".." ) == 0 )
                    break;
                if ( strcmp( buffer.achName, "." ) == 0 )
                    break;
                mpNextExpander = new ALWildCardExpander( mWildPathOnly + buffer.achName + "\\" + (char *) mWildNameOnly, 1, mCase );
                break;
//
// This is just like GET_FIRST_DIRECTORY, except it gets to call
// _dos_findnext() instead of _dos_findfirst().
//
            case GET_NEXT_DIRECTORY :
                count = 1;
                if ( DosFindNext( mpOsData->mHandle,
                                  (PVOID) &buffer,
                                  sizeof( buffer ),
                                  &count ) || count == 0 ) {
                    mState = GET_NEXT_WILD_NAME;
                    break;
                }
                if ( strcmp( buffer.achName, ".." ) == 0 )
                    break;
                if ( strcmp( buffer.achName, "." ) == 0 )
                    break;
                mpNextExpander = new ALWildCardExpander( mWildPathOnly + buffer.achName + "\\" + (char *) mWildNameOnly, 1 );
                break;
            default :
                return 0;
        }
    }
}