CP/M/CPM_CDROM.iso/cpm/bye5/ffor.asm

Assembly Source File | 1994-07-13 | 11.9 KB | 534 lines

; FFOR.ASM - Displays the FFOR text file, describing old files - 12/10/85
;
;    This program has been copyrighted (c) by Irvin M. Hoff
;
;                FOR.ASM
;                   by
;              Irvin M. Hoff
;             (17 July 1985)
;
    ASEG            ; For M80 and RMAC, ignore if using MAC
;
;
; This program displays the FFOR text file, showing the description of
; recently uploaded files.  It should go on A0: area, giving full secur-
; ity, and allowing it to be called from any drive/user area.  ^S pauses
; and the following characters will terminate at the end of the current
; line:
;
;    ^C   C     c   ^K   K   k   ^X   X   x
;
; It can also show the entire description of any file area that contains
; a string of characters typed after the FFOR name, in a similar (but
; more simple) manner to FIND52, etc.  Example:
;
;        A>FFOR ?     (displays a help guide)
;        A>FFOR IBM    (types all files with IBM somewhere)
;        A>FFOR .A?M    (accepts ? for a wildcard)
;
;-----------------------------------------------------------------------
;
; 12/10/85  Rewritten (slightly) for FFOR    - Irv Hoff
; 08/20/85  Redated for KMD04            - Irv Hoff
; 07/17/85  Initial version            - Irv Hoff
;
;-----------------------------------------------------------------------
;
; User choices
;
DRIVE    EQU    'A'        ; FFOR text file location in your system
USER    EQU    5        ; FFOR text file location in your system
;
;
; Equates
;
CR    EQU    0DH        ; Carriage return
LF    EQU    0AH        ; Line feed
EOF    EQU    1AH        ; End of file character
EOT    EQU    04H        ; End of transmission
ETX    EQU    03H        ; End of text
;
;
    ORG    0100H
;
;
    JMP    START
;
;
STDRIV:    DB    DRIVE        ; Location of FFOR text file
STUSER:    DB    USER        ; Location of FFOR text file
;
;
;=======================================================================
;
;            PROGRAM STARTS HERE
;
;=======================================================================
;
; Save stack, print sign-on, look for file specification
;
START:    LXI    H,0
    DAD    SP        ; Get 'CCP' stack
    SHLD    STACK        ; Save it for exit
    LXI    SP,STACK    ; Set stack pointer
;
    LDA    0004H        ; Get current drive/user
    STA    DRUSER        ; Store
;
;
; Set drive/user to the FFOR text file area listed above
;
    LDA    STUSER        ; Set user to FFOR text file area
    MOV    E,A
    MVI    C,SETUSR
    CALL    BDOS
    LDA    STDRIV        ; Set drive to FFOR text file area
    SUI    41H
    MOV    E,A
    MVI    C,SELDSK
    CALL    BDOS
;
;
; Open source file
;
    LXI    D,FILE
    MVI    C,OPEN
    CALL    BDOS
    INR    A        ; Check for no open
    JZ    NONE        ; No file, exit
;
    CALL    ILPRT
    DB    CR,LF
    DB    'FFOR - copyright 1985 by Irvin M. Hoff - 12/10/85'
    DB    CR,LF,'[type ^S to pause, ^C, ^X or ^K to abort, ? for '
    DB    'help]',CR,LF
    DB    'wait a moment...'
    DB    0
;
    LDA    TBUF        ; Any search string requested?
    ORA    A
    STA    SHOWAL        ; If no strings to find, show everything
    JNZ    CHECK
    CALL    ILPRT        ; Will overwrite "wait" message
    DB    CR,'                  ',CR,LF,0
    JMP    READLP        ; If no strings, exit
;
;
; Want the help guide?
;
CHECK:    LDA    TBUF+2
    CPI    '?'        ; First chararter typed a '?' for help?
    JNZ    LOOP        ; If not, continue
    LDA    TBUF+3        ; Check next character after '?'
    ORA    A        ; If a zero, they want some help
    JZ    HELP
;
;
; Store the search string in STRING
;
LOOP:    LXI    H,TBUF
    MOV    B,M        ; Get number of characters in string
    LXI    D,STRING    ; Get and store the requested string(s)
    INX    H
;
LOOP1:    INX    H
    MOV    A,M
    STAX    D
    INX    D
    DCR    B
    JNZ    LOOP1
;
;
; Address the main buffer, now
;
    LXI    D,BUFFER    ; Put in buffer
;
;
; Read record from source file
;
READLP:    PUSH    D        ; Save the line address
    MVI    C,SETDMA
    LXI    D,TBUF
    CALL    BDOS
;
    MVI    C,READ
    LXI    D,FILE
    CALL    BDOS
;
    POP    D
    ORA    A        ; Read ok?
    JNZ    RERROR        ; If not, display an error
;
    LXI    H,TBUF        ; Read buffer address
;
WRDLOP:    LDA    LFEED        ; Last character a line feed?
    ORA    A
    JZ    WRDL1        ; If not, keep going
;
    XRA    A
    STA    LFEED        ; Clear the flag
    MOV    A,M
    ANI    7FH        ; Remove any parity
    CPI    '-'        ; Is this a separator line?
    JNZ    WRDL1        ; If not, keep going
    MVI    A,03H        ; If yes, store an "end of text" char.
    STAX    D
    JMP    COMPAR        ; Handle the string
;
WRDL1:    MOV    A,M        ; Get byte from read buffer
    ANI    7FH        ; Strip parity bit
    CPI    7FH        ; DEL (rubout) ?
    JZ    NEXT        ; Yes, ignore it
    CPI    EOF        ; End of file marker ?
    JZ    TDONE        ; Transfer done, close, exit
;
    MOV    B,A        ; Store the character temporarily
    LDA    SHOWAL        ; Going to show everything?
    ORA    A
    MOV    A,B        ; Get the character back
    JNZ    WRDL2
    CALL    TYPE
    JMP    WRDL3
;
;
; Store the character in the buffer
;
WRDL2:    STAX    D        ; Store the character in the buffer
    INX    D        ; Next buffer position
;
WRDL3:    CPI    LF        ; See if finished with this line
    JNZ    NEXT        ; If not get next character
    LDA    SHOWAL
    STA    LFEED        ; Show we just had a line feed character
    CALL    ABORT        ; Ready to quit?
;
NEXT:    INR    L        ; Done with sector?
    JZ    READLP        ; If yes get another sector
    JMP    WRDLOP        ; No, get another byte
;.....
;
;
;=======================================================================
;
;             SUBROUTINES
;
;=======================================================================
;
;
; Aborts the display when requested, but only at end of line
;
ABORT:    PUSH    H        ; Save the TBUF address
    PUSH    D
    MVI    C,CONST        ; Check to see if key pressed
    CALL    BDOS
    ORA    A
    JZ    ABORT3        ; If no key pressed, then continue
    MVI    C,RDCON        ; If key pressed, then check for abort
    ANI    5FH        ; Remove parity, insure upper-case
    CALL    BDOS
    CPI    'S'-40H
    JNZ    ABORT1
    MVI    C,RDCON
    CALL    BDOS
    ANI    5FH
;
ABORT1:    CPI    'C'-40H        ; Is it CTL-C?
    JZ    ABORT2
    CPI    'K'-40H        ; Is it CTL-K?
    JZ    ABORT2        ; If no, then continue
    CPI    'X'-40H        ; Is it CTL-X?
    JZ    ABORT2
    ANI    5FH        ; Cnvert to upper-case
    CPI    'C'
    JZ    ABORT2
    CPI    'K'
    JZ    ABORT2
    CPI    'X'
    JNZ    ABORT3
;
ABORT2:    CALL    EXIT        ; If yes, then print abort message
    DB    CR,LF,'++ ABORTED ++','$'
;
ABORT3:    POP    D
    POP    H
    RET
;.....
;
;
; Print message then exit to CP/M
;
EXIT:    POP    D        ; Get message address
    MVI    C,PRINT        ; Print message
    CALL    BDOS
;
EXIT1:    CALL    ILPRT        ; Print CRLF before quitting
    DB    CR,LF,0
    LDA    DRUSER        ; Get original drive/user area back
    RAR
    RAR
    RAR
    RAR
    ANI    0FH        ; Just look at the user area
    MOV    E,A
    MVI    C,SETUSR    ; Restore original user area
    CALL    BDOS
    LDA    DRUSER        ; Get the original drive/user back
    ANI    0FH        ; Just look at the drive for now
    MOV    E,A
    MVI    C,SELDSK    ; Restore original drive
    CALL    BDOS
;
    LHLD    STACK
    XRA    A
    SPHL
    RET
;.....
;
;
; Help guide if no search string is included
;
HELP:    CALL    EXIT
    DB    CR,'   Examples of how to use:',CR,LF
    DB    CR,LF,'   B>FFOR MOD'
    DB    CR,LF,'   B>FFOR MOD|BYE'
    DB    CR,LF,'   B>FFOR M7'
    DB    CR,LF,'   B>FFOR \M7'
    DB    CR,LF,'   B>FFOR SPHL'
    DB    CR,LF,'   B>FFOR .A?M'
    DB    CR,LF,CR,LF,'   If no string is included, all the file '
    DB    'is shown.  A ''|'' allows',CR,LF,'   numerous '
    DB    'strings to be used at the same time.  ''?'' is used '
    DB    'for',CR,LF,'   "any character at this position".  A '
    DB    '''\'' fakes a line feed and',CR,LF,'   looks only at '
    DB    'the start of the filename line.',CR,LF,'$'
;.....
;
;
; Inline print routine - prints string pointed to by stack until a zero
; is found.  Returns to caller at the next address after the zero ter-
; minator.
;
ILPRT:    XTHL            ; Save HL, get message address
;
ILPLP:    MOV    A,M        ; Get chararacter
    CALL    TYPE        ; Show on CRT
    INX    H        ; Next character location
    MOV    A,M        ; Get the character
    ORA    A        ; If zero, all done
    JNZ    ILPLP        ; Else keep going
    XTHL            ; Restore HL, ret address
    RET            ; Return past the end of the message
;.....
;
;
NONE:    CALL    EXIT
    DB    CR,LF,'++ No current FFOR text file available ++','$'
;.....
;
;
; Scan for the string
;
COMPAR:    PUSH    H        ; Save the TBUF address
    LXI    H,STRING
;
ORLINE:    SHLD    STRPTR
    LXI    H,BUFFER
;
NXTSTR:    XCHG            ; Buffer location into DE for now
    LHLD    STRPTR
    XCHG            ; DE=string ponter, HL=buffer address
    PUSH    H        ; Save current buffer position
;
;
; Replace '\' with a line feed character
;
CLOOP:    LDAX    D        ; Get character from the string
    CPI    '\'
    JNZ    $+5
    MVI    A,LF        ; Call it a line feed
;
;
; Compare the string with characters in the buffer
;
    INX    D
    ORA    A        ; End of string?
    JZ    MATCHED
;
    CPI    '|'
    JZ    MATCHED        ; First part
;
    MOV    B,A        ; Store the string character for now
    MOV    A,M        ; Get the buffer character
    CPI    'a'        ; Test for lower case
    JC    NOTLWR
    CPI    'z'+1
    JNC    NOTLWR
    ANI    5FH
;
NOTLWR:    MOV    C,A        ; Store temporarily
    INX    H
    MOV    A,B        ; Get the string character back again
    CPI    '?'        ; If wild card, accept any character
    JZ    CLOOP        ; Match so far, keep going
    CMP    C        ; String char. match buffer char?
    JZ    CLOOP        ; Matched, so keep going
;
;
; Not equal
;
    POP    H        ; Restore the buffer address
    INX    H        ; Next buffer position
    MVI    B,0        ; Zero out temporary "end of file" flag
    MOV    A,M        ; Get the character
    CPI    ETX        ; At end of buffer?
    JZ    NOTEQL        ; If yes, exit
;
    CPI    EOT
    JNZ    NXTSTR        ; If not, keep going
    INR    B
;
NOTEQL:    LHLD    STRPTR        ; Reload the string pointer
;
;
; If an 'OR' (|) is in the line, scan for it
;
FINDOR:    MOV    A,M        ; Get the character from the string
    INX    H        ; Next position in string
    CPI    '|'        ; Divisor between strings
    JZ    ORLINE        ; Was a divisor, so check next string
    ORA    A        ; End of string?
    JNZ    FINDOR        ; If neither, keep checking
;
;
; Start the buffer over again
;
    MOV    A,B        ; Get our temporary "all done" flag
    ORA    A
    JNZ    TDONE1        ; If not zero, all finished
    LXI    D,BUFFER+1    ; Keep the one '-' from very first line
    POP    H        ; Restore the TBUF address
    JMP    NEXT        ; Get the next character and continue
;
;
; Now print the line itself
;
MATCHED:POP    H        ; Restore the stack from inner loop
    LDA    FIRSTM
    ORA    A
    JNZ    MATCH0
    INR    A
    STA    FIRSTM
    CALL    ILPRT
    DB    CR,'                  ',CR,LF,0
;
MATCH0:    LXI    H,BUFFER    ; Start at beginning of buffer
;
MATCH1:    MOV    A,M        ; Get the character
    CPI    ETX        ; End of Text?
    JZ    MATCH2        ; If yes, start next group
    CPI    EOT        ; End of transmission?
    JZ    TDONE1        ; If yes, all finished now
    CALL    TYPE        ; Show on CRT
    INX    H        ; Next character in buffer
    JMP    MATCH1
;
MATCH2:    POP    H        ; Restore the TBUF address
    LXI    D,BUFFER+1    ; Keep the original '-' to balance line
    JMP    NEXT        ; Get the next group
;.....
;
;
RERROR:    CPI    1        ; File finished?
    JZ    TDONE        ; Exit, then
    CALL    EXIT
    DB    '++ SOURCE FILE READ ERROR ++$'
;.....
;
;
; Transfer is done - close destination file
;
TDONE:    LDA    SHOWAL        ; Showing all text?
    ORA    A
    JZ    TDONE1        ; If yes, exit
    MVI    A,EOT        ; Store ad "end of transmission" char.
    STAX    D
    JMP    COMPAR        ; Make a final comparison
;
TDONE1:    MVI    C,CLOSE
    LXI    D,FILE
    CALL    BDOS
    CALL    EXIT
    DB    CR,'----'
    DB    CR,LF,'[End of listing]','$'
    JMP    EXIT1
;.....
;
;
; Send character in A register to console
;
TYPE:    PUSH    B
    PUSH    D
    PUSH    H
    PUSH    PSW
    MOV    E,A        ; Character to 'E' for CP/M
    MVI    C,WRCON        ; Write to console
    CALL    BDOS
    POP    PSW
    POP    H
    POP    D
    POP    B
    RET
;.....
;
;
;***********************************************************************
;
; Data area
;
;***********************************************************************
;
;
FILE:    DB    0,'FFOR       '
    DB    0,0,0,0,0,0,0
    DB    0,0,0,0,0,0,0
    DB    0,0,0,0,0,0,0
;
DRUSER:    DB    0        ; Store original drive/user area
FIRSTM:    DB    0        ; To clear "wait a momemnt....."
LFEED:    DB    0        ; Checks the character after a line feed
SHOWAL:    DB    0        ; Flag to show all text if no strings
STRPTR:    DW    0        ; Pointer for "|" scan
;
STRING:    DS    128        ; What to search for
    DS    40        ; Room for 20-level stack
;
;
; Set write buffer to even page boundry
;
    ORG    ($+255)/256*256
;
BUFFER    EQU    $        ; Write buffer starts here
STACK    EQU    BUFFER-2
;
;
; BDOS equates
;
RDCON    EQU    1        ; Read console
WRCON    EQU    2        ; Write to console
PRINT    EQU    9        ; Print string
CONST    EQU    11        ; Get console status
SELDSK    EQU    14        ; Select requested disk drive
OPEN    EQU    15        ; Open a file
CLOSE    EQU    16        ; Close a file
READ    EQU    20        ; Read sequential file
SETDMA    EQU    26        ; Set dma address
SETUSR    EQU    32        ; Set requested user area
;
BDOS    EQU    0005H
TBUF    EQU    0080H
;.....
;
;
    END