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44 lines
1.5 KiB
Plaintext
44 lines
1.5 KiB
Plaintext
;Module arg,h02 common functions for Commodore 8-bit computers
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;Command Line Arguments are specified in the form:
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; RUN:"arg1 arg2 arg3..
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;The colon terminates the RUN statement
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;The quote ensures that the arguments are not tokenized
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;The list may optionally be terminated with a quote
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SUBROUTINE ARGS
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;Argument Parser Constants
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ARGFLG EQU $00 ;Command Arguments Supported
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ARGDLM EQU $20 ;Argument Separator (Space)
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ARGTRM EQU $22 ;Argument Terminator (Quotes)
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ARGMSK EQU $FF ;Mask: No Change
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;argset() - Set Up Argument List for argget() calls
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;Uses: SYSBFR - System Buffer
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; SYSBFP - System Buffer Position
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;Sets: SYSBFP - New Buffer Position
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;Affects: X,C
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;Returns: A = $00 - Success
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; $FF - No Arguments Specified
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ARGSET: LDX SYSBFP ;Set Index to System Buffer Position
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LDA SYSBFR,X ;
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CMP #':' ;If First Character is a Colon
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BNE .NOARGS ;
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INX ;
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LDA SYSBFR,X ;
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CMP #$22 ;and Second Character is a Quote
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BNE .NOARGS ;
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INX ; Increment Index Past Quote
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LDA #$FF ; and Return Success
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BNE .SDONE ;Else
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.NOARGS LDA #0 ; Terminate Argument List
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STA SYSBFR,X ; Set Buffer Position
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.SDONE STX SYSBFP ; and Return Failure
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EOR #$FF ;Invert Result
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RTS ;
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INCLUDE "argget.a02" ;Generic ARGGET Routine
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ENDSUBROUTINE
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