400 lines
12 KiB
C++
Executable File
400 lines
12 KiB
C++
Executable File
//
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// WILDDOS.CPP
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//
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// Source file for ArchiveLib 2.0
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//
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// Copyright (c) Greenleaf Software, Inc. 1994-1996
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// All Rights Reserved
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//
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// CONTENTS
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//
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// ALWildCardExpander::ConstructOsData()
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// ALWildCardExpander::DestroyOsData()
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// ALWildCardExpander::GetNextFile()
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//
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// DESCRIPTION
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//
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// This file contains the OS specific routines need to expand
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// wild card file names. Different versions of these three functions
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// exist for DOS, Win95, and OS/2.
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//
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// REVISION HISTORY
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//
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// February 14, 1996 2.0A : New release
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//
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#include "arclib.h"
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#if !defined( AL_IBM )
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#pragma hdrstop
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#endif
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#include <stdlib.h>
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#include <dos.h>
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#ifdef __BORLANDC__
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#include <dir.h>
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#endif
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#include "wildcard.h"
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class AL_CLASS_TYPE ALWildCardOsData { /* Tag internal class */
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public :
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find_t *f;
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};
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//
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// NAME
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//
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// ALWildCardExpander::ConstructOsData()
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//
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// PLATFORMS/ENVIRONMENTS
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//
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// DOS Win16
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// C++
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//
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// SHORT DESCRIPTION
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//
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// Allocate space for a wildcard search under the MS-DOS file system.
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//
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// C++ SYNOPSIS
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//
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// #include "arclib.h"
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// #include "wildcard
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//
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// void ALWildCardExpander::ConstructOsData();
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//
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// C SYNOPSIS
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//
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// No C translation for this internal protected function.
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//
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// VB SYNOPSIS
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//
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// No VB translation for this internal protected function.
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//
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// DELPHI SYNOPSIS
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//
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// No Delphi translation for this internal protected function.
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//
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// ARGUMENTS
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//
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// None.
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//
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// DESCRIPTION
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//
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// The process of wild card file expansion differs drastically for
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// all the different environments we support. Since each system
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// is going to have different data requirements, we don't try to
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// allocate it in the base class. Instead, we just keep a pointer to
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// the data, and allocate it in this member function. Different versions
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// of this member function show up in different directories, and the
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// BUILD.INI file directs the compiler as to which to include.
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//
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// This module supports the MS-DOS file system. The MS-DOS wild card
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// expansion state is stored in a find_t structure. We allocate that
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// structure here, and store a pointer to it in the mpOsData member
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// of the ALWildCardExpander structure. Note that the find_t data
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// isn't initialized yet, we have just allocated some space for it.
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//
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// RETURNS
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//
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// Nothing.
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//
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// EXAMPLE
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//
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// SEE ALSO
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//
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// REVISION HISTORY
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//
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// February 14, 1996 2.0A : New release.
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//
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void AL_PROTO
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ALWildCardExpander::ConstructOsData() /* Tag protected function */
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{
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mpOsData = new ALWildCardOsData;
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mpOsData->f = new find_t;
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}
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//
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// NAME
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//
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// ALWildCardExpander::DestroyOsData()
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//
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// PLATFORMS/ENVIRONMENTS
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//
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// DOS Win16
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// C++
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//
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// SHORT DESCRIPTION
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//
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// Destroy the space allocated for the wildcard search under MS-DOS.
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//
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// C++ SYNOPSIS
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//
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// #include "arclib.h"
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// #include "wildcard
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//
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// void ALWildCardExpander::DestroyOsData();
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//
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// C SYNOPSIS
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//
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// No C translation for this internal protected function.
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//
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// VB SYNOPSIS
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//
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// No VB translation for this internal protected function.
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//
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// DELPHI SYNOPSIS
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//
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// No Delphi translation for this internal protected function.
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//
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// ARGUMENTS
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//
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// None.
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//
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// DESCRIPTION
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//
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// The process of wild card file expansion differs drastically for
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// all the different environments we support. Since each system
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// is going to have different data requirements, we don't try to
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// allocate it in the base class. Instead, we just keep a pointer to
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// the data, and allocate it in the member function ConstructOsData().
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//
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// If we are constructing something when the search starts, it makes sense
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// that we need to destroy it when the search is over. That's what this
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// guy does.
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//
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// RETURNS
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//
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// Nothing.
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//
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// EXAMPLE
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//
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// SEE ALSO
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//
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// REVISION HISTORY
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//
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// February 14, 1996 2.0A : New release.
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//
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void AL_PROTO
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ALWildCardExpander::DestroyOsData() /* Tag protected function */
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{
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if ( mpOsData ) {
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delete mpOsData->f;
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delete mpOsData;
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}
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mpOsData = 0;
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}
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//
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// NAME
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//
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// ALWildCardExpander::GetNextFile()
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//
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// PLATFORMS/ENVIRONMENTS
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//
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// DOS Win16
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// C++ C VB Delphi
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//
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// SHORT DESCRIPTION
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//
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// Search for an additional file in the wildcard expansion.
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//
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// C++ SYNOPSIS
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//
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// #include "arclib.h"
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// #include "wildcard.h"
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//
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// char *ALWildCardExpander::GetNextFile();
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//
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// C SYNOPSIS
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//
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// #include "arclib.h"
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// #include "wildcard.h"
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//
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// char * ALExpanderGetNextFile( hALExpander this_object );
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//
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// VB SYNOPSIS
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//
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// Declare Function ALExpanderGetNextFile Lib "AL20LW"
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// Alias "ALExpanderGetNextFileVB"
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// (ByVal this_object&) As String
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//
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// DELPHI SYNOPSIS
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//
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// function ALExpanderGetNextFile( this_object : hALExpander ) : PChar;
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//
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// ARGUMENTS
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//
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// this_object : A reference or pointer to the ALWildCardExpander that
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// is performing the expansion. Note that the C++ member
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// version of this call doesn't have an explicit argument
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// here, since it has access to 'this' implicitly.
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//
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// DESCRIPTION
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//
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// The ALWildCardExpander has what amounts to six different internal
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// states. They are:
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//
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// Searching subdirectories, using another object
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//
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// Extracting the next wild spec from the input line
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//
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// Expanding the wild card to get the first matching file
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//
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// Expanding the wild card to get the next matching file
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//
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// Looking for the first subdirectory
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//
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// Looking for the next subdirectory
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//
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// For the most part, we keep track of the state using the mState
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// variable. However, we keep track of whether we are searching
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// subdirectories by examining the pointer to the next expander. If
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// it is non-null, it means we are in that state.
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//
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//
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// RETURNS
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//
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// In the event that this routine is able to come up with a new
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// file name, it returns a character pointer to the name, which
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// is kept in member variable mResultFileName. If no new file
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// name could be cooked up, we return a 0, which means you are
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// done.
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//
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// EXAMPLE
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//
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// SEE ALSO
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//
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// REVISION HISTORY
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//
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// February 14, 1996 2.0A : New release.
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//
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char AL_DLL_FAR * AL_PROTO
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ALWildCardExpander::GetNextFile() /* Tag public function */
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{
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//
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// mpFfblk/mpOsData is the pointer to my structure used by _dos_findfirst()
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// and _dos_findnext(). If for some reason this is a null pointer,
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// I need to quit. The only reason this should be null is a memory
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// allocation failure.
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//
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if ( mpOsData == 0 )
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return 0;
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for ( ; ; ) {
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//
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// If the pointer to the next expander is non-zero, it means I am in
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// the middle of a subdirectory search. If that is the case, I call
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// the next expander to see if it can come up with a file name. if
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// it does, we return it. If it doesn't, it means it is done, and
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// I can delete it and try my luck with the next subdirectory.
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//
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if ( mpNextExpander ) {
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char AL_DLL_FAR *p = mpNextExpander->GetNextFile();
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if ( p )
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return p;
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delete mpNextExpander;
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mpNextExpander = 0;
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}
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switch ( mState ) {
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//
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// This is where I start, and this is where I end up after completely
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// processing one of the input wild specs. I get the next name from
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// the input line here. If there aren't any more names, I can return
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// 0, meaning the whole thing is done.
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//
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case GET_NEXT_WILD_NAME :
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if ( GetNextWildName() == 0 )
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return 0;
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mWildPathOnly = mFullWildName;
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mWildPathOnly.StripFileName();
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mWildNameOnly = mFullWildName;
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mWildNameOnly.StripPath();
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mState = GET_FIRST_FILE_NAME;
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break;
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//
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// Once I have a file name, I start parsing using _dos_findfirst().
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// If that doesn't return a name, I have struck out on my first swing.
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// if that is the case, I either move on to start searching subdirectories,
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// or go back and look for another name from the input line. On the
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// other hand, if I get a name, I return it to the caller.
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//
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case GET_FIRST_FILE_NAME :
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if ( _dos_findfirst( mFullWildName, 0, mpOsData->f ) ) {
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if ( miTraverseFlag )
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mState = GET_FIRST_DIRECTORY;
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else
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mState = GET_NEXT_WILD_NAME;
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break;
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}
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mState = GET_NEXT_FILE_NAME;
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mResultFileName = ALName( mWildPathOnly + mpOsData->f->name );
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return mResultFileName;
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//
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// This state is identical to GET_FIRST_FILE_NAME, except it has to
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// use _dos_findnext() instead of _dos_findfirst()
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//
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case GET_NEXT_FILE_NAME :
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if ( _dos_findnext( mpOsData->f ) ) {
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if ( miTraverseFlag )
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mState = GET_FIRST_DIRECTORY;
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else
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mState = GET_NEXT_WILD_NAME;
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break;
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}
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mResultFileName = mWildPathOnly + mpOsData->f->name;
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return mResultFileName;
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//
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// After getting all of the file names that a wildspec expands into,
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// we can start searching subdirectories, if needed. Unlike with NT,
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// we can set our search up to look for directories only. that means
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// we don't have to check the status of the file returned from _dos_findxxxx().
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// However, we always do have to check to make sure it isn't one of the
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// two bogus directory entries, "." or "..".
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//
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// If we score here, we create a new ALWildCardExpander, and put him to
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// work. If we strike out, time to go back and get our next input
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// file name.
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//
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case GET_FIRST_DIRECTORY :
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if ( _dos_findfirst( mWildPathOnly + "*.*", _A_SUBDIR, mpOsData->f ) ) {
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mState = GET_NEXT_WILD_NAME;
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break;
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}
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mState = GET_NEXT_DIRECTORY;
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if ( mpOsData->f->attrib & _A_SUBDIR ) {
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if ( strcmp( mpOsData->f->name, ".." ) == 0 )
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break;
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if ( strcmp( mpOsData->f->name, "." ) == 0 )
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break;
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mpNextExpander = new ALWildCardExpander( mWildPathOnly + mpOsData->f->name + "\\" + (char *) mWildNameOnly, 1, mCase );
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}
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break;
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//
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// This is just like GET_FIRST_DIRECTORY, except it gets to call
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// _dos_findnext() instead of _dos_findfirst().
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//
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case GET_NEXT_DIRECTORY :
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if ( _dos_findnext( mpOsData->f ) ) {
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mState = GET_NEXT_WILD_NAME;
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break;
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}
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if ( mpOsData->f->attrib & _A_SUBDIR ) {
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if ( strcmp( mpOsData->f->name, ".." ) == 0 )
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break;
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if ( strcmp( mpOsData->f->name, "." ) == 0 )
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break;
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mpNextExpander = new ALWildCardExpander( mWildPathOnly + mpOsData->f->name + "\\" + (char *) mWildNameOnly, 1 );
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}
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break;
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default :
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return 0;
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}
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}
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#if defined( AL_MICROSOFT ) && ( AL_MICROSOFT < 800 )
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return 0; //MSC 7.0 thinks I need this return path. No way to get here!
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#endif
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}
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