Category : BASIC Source Code
Archive   : PBC30A.ZIP
Filename : ARCVIEW.BAS

' +----------------------------------------------------------------------+
' | |
' | PBClone Copyright (c) 1990-1994 Thomas G. Hanlin III |
' | |
' +----------------------------------------------------------------------+

' This is another simple demo of the PBClone routines. It allows you to
' view the files in an archive (.ARC, .ARJ, .LZH, .PAK, .ZIP, or .ZOO).

' Syntax:
' ARCVIEW arcname[.ext] [/V]

' The file extension for the archive is optional, although you may want to
' specify it if there is a possibility that you have two archives of the
' same name but different extensions (e.g., FOO.ARJ and FOO.ZIP). The /V
' option allows you to specify a full listing-- without it, you will get
' a "wide format" display containing just the file names in the archive.

' Typically, this would be converted to an .EXE file using these steps:
' BC ARCVIEW/O;
' LINK ARCVIEW/EX,,NUL,PBCLONE;

DECLARE SUB CloseA ()
DECLARE SUB DateN2S (MonthNr%, DayNr%, YearNr%, DateSt$)
DECLARE SUB FindFirstA (Archive$, FileName$, ErrCode%)
DECLARE SUB FindNextA (ErrCode%)
DECLARE SUB GetCRCAL (CRC32&)
DECLARE SUB GetDateA (MonthNr%, DayNr%, YearNr%)
DECLARE SUB GetNameA (FileName$, FileNameLen%)
DECLARE SUB GetSizeAL (OriginalSize&, CurrentSize&)
DECLARE SUB GetTimeA (HourNr%, MinuteNr%, SecondNr%)
DECLARE SUB TimeN2S (HourNr%, MinuteNr%, SecondNr%, TimeSt$)

DECLARE SUB PrintComma (Number&, FieldLen%)

DEFINT A-Z

Cmd$ = LTRIM$(RTRIM$(UCASE$(COMMAND$)))
IF LEN(Cmd$) = 0 OR INSTR(Cmd$, "/?") > 0 THEN
PRINT "ARCVIEW: View Archive Demo for PBClone by Thomas G. Hanlin III"
PRINT
PRINT "Syntax:"
PRINT " ARCVIEW arcname[.ext] [/V]
PRINT
PRINT "Use /V for a full listing, as opposed to just a list of the files contained"
PRINT "in the archive. ARCVIEW currently supports ARC, ARJ, LZH, PAK, ZIP, and ZOO."
END
END IF
tmp = INSTR(Cmd$, "/V")
IF tmp THEN
FullView = -1
Cmd$ = LTRIM$(RTRIM$(LEFT$(Cmd$, tmp - 1) + MID$(Cmd$, tmp + 2)))
END IF
IF LEN(Cmd$) THEN
Arc$ = Cmd$
ELSE
PRINT "Please specify the name of an archive."
END
END IF

FindFirstA Arc$, "*.*", ErrCode
IF ErrCode THEN
PRINT "Unable to open archive "; CHR$(34); Arc$; CHR$(34)
END
END IF

IF FullView THEN
PRINT "Filename Date Time CRC Curr. Size Orig. Size"
PRINT "------------------- -------- ----- -------- ----------- -----------"
END IF

FileName$ = SPACE$(80)
DO
GetNameA FileName$, FLen
IF FullView THEN
IF FLen > 22 THEN
F$ = "..." + RIGHT$(LEFT$(FileName$, FLen), 19)
FLen = 22
ELSE
F$ = LEFT$(FileName$, FLen)
END IF
PRINT F$; SPACE$(22 - FLen);
GetDateA MonthNr, DayNr, YearNr
DateSt$ = "xx/xx/xx"
DateN2S MonthNr, DayNr, YearNr, DateSt$
PRINT DateSt$; " ";
GetTimeA HourNr, MinuteNr, SecondNr
TimeSt$ = "xx:xx"
TimeN2S HourNr, MinuteNr, SecondNr, TimeSt$
PRINT TimeSt$; " ";
GetCRCAL CRC32&
HexCRC$ = RIGHT$("00000000" + HEX$(CRC32&), 8)
PRINT HexCRC$;
GetSizeAL OriginalSize&, CurrentSize&
PrintComma CurrentSize&, 14
PrintComma OriginalSize&, 14
PRINT
ELSE
IF FLen > 15 THEN
F$ = "..." + RIGHT$(LEFT$(FileName$, FLen), 12)
FLen = 15
ELSE
F$ = LEFT$(FileName$, FLen)
END IF
PRINT F$; SPACE$(16 - FLen);
END IF
FindNextA ErrCode
LOOP UNTIL ErrCode

CloseA

SUB PrintComma (Number&, FieldLen)
N$ = LTRIM$(STR$(Number&))
R$ = ""
DO WHILE LEN(N$) > 3
R$ = RIGHT$(N$, 3) + "," + R$
N$ = LEFT$(N$, LEN(N$) - 3)
LOOP
IF LEN(N$) THEN R$ = N$ + "," + R$
IF RIGHT$(R$, 1) = "," THEN R$ = LEFT$(R$, LEN(R$) - 1)
IF LEN(R$) < FieldLen THEN
R$ = SPACE$(FieldLen - LEN(R$)) + R$
END IF
PRINT R$;
END SUB