The World of Computer Software/World_Of_Computer_Software-02-387-Vol-3of3.iso/c/compdem.zip/ETUNZIP.BAS

BASIC Source File | 1992-12-14 | 6KB | 173 lines

    '   ETUNZIP.EXE
    '   (C) Copyright 1992-1993 EllTech Development, Inc.
    '   All rights reserved

    '   =======================================================================
    REM $INCLUDE: 'compress.bi'
    REM $INCLUDE: 'compres2.bi'
    REM $INCLUDE: 'etdecasm.bi'

    Version$ = "1.00"
    Cmd$ = UCASE$(COMMAND$)

    PRINT
    PRINT "ETUNZIP v"; Version$
    PRINT "Data DeCompression Utility"
    PRINT "(C) Copyright 1992-1993 EllTech Development, Inc."
    PRINT "All rights reserved."
    PRINT
    PRINT "This utility demostrates some of the capabilities of EllTech's"
    PRINT CHR$(34); "Compression Plus"; CHR$(34); " data compression library for QuickBASIC,"
    PRINT "PDS, and VBDOS programmers. For more information, contact"
    PRINT "EllTech Development, Inc. at [phone] or on CIS at 76220,2575."
    PRINT

    IF LEN(Cmd$) = 0 THEN                                  'If no command line arguments were
        GOTO ShowHelp                                      ' passed in, remind the user the
    END IF                                                 ' program syntax.

    DIM Param$(1 TO 20, 0 TO 1)
    Sep$ = " "
    CALL EtParseCmdLine(Cmd$, Sep$, Param$(), Found%)      'Otherwise, parse out the command line

    IF Found% < 1 THEN                                     'zip file name is required
        GOTO ShowHelp                                      'remedial reading :-)
    END IF

    Pcnt% = 0
    SpecCnt% = 0
    REDIM Spec$(1 TO 10)
    FOR I% = 1 TO Found%
        SELECT CASE LEFT$(Param$(I%, 0), 1)
            CASE "-", "/":                                 'this is a switch
                Switch$ = Switch$ + Param$(I%, 0)
            CASE ELSE
                Pcnt% = Pcnt% + 1
                SELECT CASE Pcnt%
                    CASE 1                                 'first non-switch is arc file name
                        ArcFile$ = Param$(I%, 0)
                    CASE 2
                        Target$ = Param$(I%, 0)
                    CASE IS >= 3                           'other non-switch params are file specs
                        IF SpecCnt% < UBOUND(Spec$) THEN
                            SpecCnt% = SpecCnt% + 1
                            Spec$(SpecCnt%) = Param$(I%, 0)
                        END IF
                    CASE ELSE
                END SELECT
        END SELECT
    NEXT

    IF INSTR(ArcFile$, ".") = 0 THEN                       'default extension
        ArcFile$ = ArcFile$ + ".zip"
    END IF
    IF NOT EtFileExist%(ArcFile$) THEN
        PRINT "Zip File Not Found: "; ArcFile$
        GOTO AllDone
    END IF

    '-----check target
    IF LEN(Target$) THEN
        IF INSTR(Switch$, "V") > 0 THEN
            SpecCnt% = SpecCnt% + 1                        'No target on view
            Spec$(SpecCnt%) = Target$
        ELSE
            IF RIGHT$(Target$, 1) <> ":" AND RIGHT$(Target$, 1) <> "\" THEN
                Target$ = Target$ + "\"
            END IF
            Status% = EtFileOpen%(Target$ + "etcmprs.$$$", 0, Handle%)
            IF Status% THEN
                PRINT "Invalid Target: "; Target$
                GOTO ShowHelp
            END IF
            EtFileClose Handle%
            Temp% = EtFileDelete%(Target$ + "etcmprs.$$$")
        END IF
    END IF

    IF SpecCnt% = 0 THEN
        SpecCnt% = 1
        Spec$(1) = "*.*"                                   'default spec
    END IF

    IF INSTR(Switch$, "V") THEN
        Status% = EtViewZip%(ArcFile$, Spec$())
        MatchCnt% = 1
    ELSE
        MatchCnt% = 0
        Status% = EtZipOpen(ArcFile$, Mode%, Handle%)
        IF Status% THEN
            PRINT "Error"; Status%; "opening file "; ArcFile$; "."
            END
        END IF
        FOR I% = 1 TO SpecCnt%
            'Process each spec, one at a time.
            IF LEN(Spec$(I%)) THEN
                Status% = EtUnZip%(Handle%, Target$, Spec$(I%), Switch$)
            END IF

            IF Status% = -7 THEN            'if no files were found for this spec
                Status% = 0                 'we want to try all the file specs before
            ELSE                            'we report an error
                MatchCnt% = MatchCnt% + 1
            END IF

            IF Status% THEN
                EXIT FOR
            END IF
        NEXT
    END IF

    IF Status% THEN
        SELECT CASE Status%
            CASE -1
                ArcType% = EtArcType%(Handle%, Status%)
                SELECT CASE ArcType%
                    CASE 2:
                        PRINT "Cannot Decompress ARJ files ... Use -v to view"
                    CASE 3:
                        PRINT "Cannot Decompress LZH files ... Use -v to view"
                    CASE ELSE
                        PRINT "Unrecognized File Format: "; ArcFile$
                END SELECT

            CASE -2
                PRINT "Error in Zip: "; ArcFile$
            CASE -3
                PRINT "Unknown Compression Method"
            CASE -4
                PRINT "Encrypted File"
            CASE -5
                PRINT "CRC Error"
            CASE -6
                PRINT "Zip File Not Found"
            CASE -8
                PRINT "Errors Encountered"
            CASE IS > 0
                PRINT "DOS Error : "; Status%
            CASE ELSE
                PRINT "Error Status: "; Status%
        END SELECT
    ELSEIF MatchCnt% = 0 THEN
        PRINT "Nothing To Do"
    ELSE
        PRINT "Unzip Successful"
    END IF

    EtZipClose Handle%
    GOTO AllDone

ShowHelp:
    PRINT
    PRINT "Syntax: EtUnZip [Switches] ArchiveFile [TargetPath] [FileSpec [FileSpec...]]"
    PRINT "ie:     EtUnZip -d Stuff.Zip c:\stuff *.asm -d"
    PRINT
    PRINT "Valid Switches: -d Create paths if stored with filename"
    PRINT "                -o Overwrite without prompting"
    PRINT "                -v View Zip Directory"


AllDone:
    END