mirror of https://github.com/A2osX/A2osX.git
429 lines
18 KiB
Plaintext
429 lines
18 KiB
Plaintext
NEW
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AUTO 3,1
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.LIST OFF
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.OP 65C02
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.OR $2000
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.TF bin/seq
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*/-------------------------------------
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* # SEQ
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* Prints sequences of numbers.
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*
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* ## Arguments
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* **<first>**
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* Starting number for the sequence of numbers.
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*
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* **<incr>**
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* Count in increments of <incr>. Default is 1 if omitted.
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*
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* **<last>**
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* Last number to count to. If <last> is less than <first>, then the default <incr> is -1.
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*
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* ## Return Value
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* N/A
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*
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* ### Author
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* 2021-11-17, Brian J. Bernstein <brian@dronefone.com>.
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*\-------------------------------------
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.INB inc/macros.i
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.INB inc/a2osx.i
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*--------------------------------------
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* Defines / Consts
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*--------------------------------------
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DIR_INCREMENT .EQ 1
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DIR_DECREMENT .EQ 0
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*--------------------------------------
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* Zero Page Segment, up to 32 bytes
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*--------------------------------------
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.DUMMY
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.OR ZPBIN
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ZS.START
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ZPPtr1 .BS 2 ; address pointer (used in arg parsing)
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ArgIndex .BS 1 ; index offset for argument parsing
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NumArgIndex .BS 1 ; used for numerical argument indexing
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Direction .BS 1 ; direction of counting, 0=backwards, 1=forwards
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wFirst .BS 2 ; arg variable - starting count
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wIncr .BS 2 ; arg variable - increment
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wLast .BS 2 ; arg variable - ending count
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bFormat .BS 1 ; flag that the format -f option was specified
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bHelp .BS 1 ; flag that the help -h option was specified
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ZPPtrFormat .BS 2 ; pointer to format -f string
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bString .BS 1 ; flag that the string -s option was specified
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ZPPtrString .BS 2 ; pointer to string -s string
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bTerminating .BS 1 ; flag that the terminating -t option was specified
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ZPPtrTerm .BS 2 ; pointer to terminating -t string
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*--------------------------------------
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* X.STRESC
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*--------------------------------------
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*ZPPtr1 .BS 2
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ZPPtr2 .BS 2
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ZPTmpByte .BS 1
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*--------------------------------------
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ZS.END .ED
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*--------------------------------------
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* File Header (16 Bytes)
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*--------------------------------------
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CS.START cld
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jmp (.1,x)
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.DA #$61 ; 6502,Level 1 (65c02)
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.DA #1 ; BIN Layout Version 1
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.DA #0 ; Events disabled (enable with S.PS.F.EVENT)
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.DA #0
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.DA CS.END-CS.START ; Code Size (without Constants)
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.DA DS.END-DS.START ; Data SegmentSize
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.DA #32 ; Stack Size
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.DA #ZS.END-ZS.START ; Zero Page Size
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.DA 0
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*--------------------------------------
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* Relocation Table
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*--------------------------------------
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.1 .DA CS.INIT
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.DA CS.RUN
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.DA CS.DOEVENT
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.DA CS.QUIT
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L.MSG.USAGE .DA MSG.USAGE ; msg for usage / help text
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L.MSG.NEWLINE .DA MSG.MSG.NEWLINE
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L.FMT.FORMAT .DA FMT.FORMAT
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L.FMT.STRING .DA FMT.STRING
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L.FMT.TERM .DA FMT.TERM
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.DA 0
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*--------------------------------------
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* Called once at process creation
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* Put code for loading LIB here
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*--------------------------------------
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CS.INIT clc
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lda L.FMT.FORMAT ; set default format
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sta ZPPtrFormat
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lda L.FMT.FORMAT+1
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sta ZPPtrFormat+1
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lda L.FMT.STRING ; set default string separator
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sta ZPPtrString
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lda L.FMT.STRING+1
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sta ZPPtrString+1
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lda L.FMT.TERM ; set default seq terminator string
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sta ZPPtrTerm
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lda L.FMT.TERM+1
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sta ZPPtrTerm+1
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rts
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*--------------------------------------
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* Called until exit with CS
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* if RUN exits with CC, RUN entered again
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*--------------------------------------
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CS.RUN
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.1 inc ArgIndex ; Check next argument
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lda ArgIndex
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>SYSCALL ArgV ; check for an arg at index in A
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bcc .10 ; if it exists, keep checking
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jmp .8 ; otherwise, we're done with args
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.10 >STYA ZPPtr1 ; ArgV pointer was in Y,A so stick into ZPPtr1
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lda (ZPPtr1)
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cmp #'-' ; does arg have a hyphen?
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bne .11 ; if not, check for string/numeric args
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jsr CS.RUN.CheckOpt ; if it had a hyphen, check and set arg if recognized
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bcs .9 ; if we didn't recognize the arg, go to usage and exit
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bit bHelp ; was the arg 'Help'?
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bpl .1 ; no, loop again to check next
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jmp .9 ; it was, so display usage and exit
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*--- Checking of argument -F ----------
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.11 bit bFormat ; did we just see the -f option?
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bpl .12 ; no, jump to next arg flag
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lda ArgIndex ; yes, then get the pointer to the arg string
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>SYSCALL ArgV ; and set it to the pointer for the -f
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>STYA ZPPtrFormat ; string storage
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lda #0 ; and clear out that we processed the -f
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sta bFormat ; argument so that we don't try it again
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jmp .1 ; and then go process the next arg
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*--- Checking of argument -S ----------
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.12 bit bString ; did we just see the -s option?
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bpl .13 ; no, jump to next arg flag
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lda ArgIndex ; yes, then get the pointer to the next arg string
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>SYSCALL ArgV ; and set it to the pointer for the -s
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>STYA ZPPtrString ; string storage
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lda #0 ; and clear out that we processed the -s
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sta bString ; argument so that we don't try to do it again
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jmp .1 ; and then go process the next arg
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*--- Checking of argument -T ----------
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.13 bit bTerminating ; did we just see the -t option?
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bpl .2 ; no, jump to numeric processing
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lda ArgIndex ; yes, then get the pointer to the arg string
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>SYSCALL ArgV ; and set it to the pointer for the -t
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>STYA ZPPtrTerm ; string storage
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lda #0 ; and clear out that we processed the -t
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sta bTerminating ; argument so that we don't try it again
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jmp .1 ; and then go process the next arg
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*--- Display usage and error out ------
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.9
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>PUSHW L.MSG.USAGE ; push address for usage text
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>PUSHBI 0
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>SYSCALL PrintF ; print usage message
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lda #E.SYN ; set OS return code as Syntax Error
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sec ; indicate we don't want CS.RUN called again
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rts ; return to OS
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*--- Successful exit ------------------
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.99
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lda #0 ; set OS return code to success
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sec ; indicate we don't want CS.RUN called again
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rts ; return to OS
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*--- Processing numerical args --------
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.2 lda ArgIndex
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>SYSCALL ArgV ; check for an arg at index in A
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.20 >SYSCALL AToI ; get the next value on the command line
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>STYA wIncr ; temporarily store it as the increment value
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inc NumArgIndex
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lda NumArgIndex ; check what argument value we were looking at
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cmp #1 ; because if it was the first, then it is probably wFirst
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bne .3
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>LDYA wIncr ; copy the value to wFirst
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>STYA wFirst
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.3 cmp #2 ; but if we were looking at second value, then
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bne .4 ; we assume it is 'wLast' for the moment
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>LDYA wIncr ; and copy it over
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>STYA wLast
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.4 cmp #3 ; if we're looking at third value, then we must have had
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bne .5 ; an increment value, so we need to swap what we recorded
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ldx wLast ; as wLast and swap it with the just-read wIncr
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ldy wIncr
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stx wIncr
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sty wLast
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ldx wLast+1 ; as wLast and swap it with the just-read wIncr
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ldy wIncr+1
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stx wIncr+1
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sty wLast+1
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.5 jmp .1 ; go check for another argument
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*--- Done with args so figure out -----
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*--- what numerical args are for ------
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.8 lda NumArgIndex ; check that we got 1 to 3 numeric arguments.
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cmp #1
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bmi .9 ; otherwise, display help and error out
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cmp #4
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bpl .9
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cmp #1 ; if we only got one, then it was wLast
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bne .81
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lda wFirst ; copy what we thought was wFirst to wLast
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sta wLast
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lda wFirst+1
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sta wLast+1
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ldy #1 ; set 1 as wFirst
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lda #0
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>STYA wFirst
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>STYA wIncr ; and set 1 as wIncr
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jmp .82
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.81 cmp #2 ; check to see if we didn't get an increment
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bne .82
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ldy #1 ; if not, then just store +1 as the increment
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lda #0
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>STYA wIncr
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.82 jsr CS.RUN.Seq ; everything is set, go 'seq' fame and fortune
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jmp .99
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*--------------------------------------
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* Called if option S.PS.F.EVENT enabled in Header
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* Timer Event : every 10th seconds
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*--------------------------------------
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CS.DOEVENT sec ; we don't use this since we don't have timer events
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rts
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*--------------------------------------
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* Called once, when RUN exited with CS
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* Put code for unloading LIB here
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*--------------------------------------
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CS.QUIT clc ; nothing to do on exit except clear carry and return
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rts
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*--------------------------------------
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* CheckOpt assumes a set ZPPtr1 which is the address of the command line argument being examined.
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* We start at 1 to look past the '-' as position 0 since that was checked by the caller.
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* OptionList is a list of possible options and each character correlates with a memory offset
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* in OptionVars, which are only one byte since they are in ZP but this also allows for us to
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* simply use indexed addressing to reference them easily as well instead of doing 16-bit
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* address juggling.
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* The options are checked in reverse from end-to-start and indexed by X.
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*--------------------------------------
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CS.RUN.CheckOpt ldy #1 ; set up y to look at second character of passed in arg
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lda (ZPPtr1),y ; check second character of passed in argument into A
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ldx #OptionVars-OptionList-1 ; clever way to put size of OptionList into X
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.2 cmp OptionList,x ; compare the arg we got to the OptionList at X
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beq .3 ; if it is a match, go handle it.
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dex ; if not, decrement so we can check next OptionList
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bpl .2 ; if we haven't reached end of OptionList, go check next
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sec ; set carry if we didn't find a match
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rts ; return to caller
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.3 ldy OptionVars,x ; since we matched, find ZP addr of matching option into Y
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lda #$ff ; we will set this ZP option to $FF
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sta 0,y ; store A into the ZP address we have in Y
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clc ; clear carry since we found a match
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rts ; return to caller
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*--------------------------------------
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*--------------------------------------
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* CS.RUN.Seq - Entry point for when args are handled and we're ready to 'seq'.
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* This is anything we need to do before actually 'seq'encing.
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*--------------------------------------
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CS.RUN.Seq jsr CS.DetermineDir ; determine if we're doing increment or decrement
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*--------------------------------------
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* CS.DoSeq - the actual 'SEQ' work once everything is set up.
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*--------------------------------------
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CS.DoSeq
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*--- Print the number in ZPPtrFormat --
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.1 >PUSHW ZPPtrFormat ; set up the format that we're printing sequence with
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>PUSHW wFirst ; current seq value is kept in wFirst
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>PUSHBI 2
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>SYSCALL PrintF ; print the current seq count.
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*--- Print the string sepators --------
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>LDYA ZPPtrString
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jsr CS.PrintFEscYA ; print string separator
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lda Direction ; check which direction we're counting
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cmp #DIR_INCREMENT ; going up?
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bne .2 ; nope, go to decrement code
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*--- Do INCREMENTAL math on the seq ---
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clc ; ADDING wIncr to wFirst
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lda wFirst ; do 16-bit addition of wFirst + wIncr
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adc wIncr
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sta wFirst
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lda wFirst+1
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adc wIncr+1
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sta wFirst+1
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jsr CS.CmpFirstLast ; is wFirst >= wLast?
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bcs .1 ; no, so keep going
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lda wFirst ; check to see if wFirst == wLast
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cmp wLast
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bne .9
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lda wFirst+1
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cmp wLast+1
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bne .9
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jmp .1 ; wFirst == wLast, so go around one more time
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*--- Do DECREMENTAL math on the seq ---
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.2 sec ; SUBTRACTING wIncr from wFirst
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lda wFirst
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sbc wIncr
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sta wFirst
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lda wFirst+1
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sbc wIncr+1
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sta wFirst+1
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jsr CS.CmpFirstLast ; is wFirst still >= wLast?
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bcc .1 ; yes, keep going.
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lda wFirst ; check to see if wFirst == wLast
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cmp wLast
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bne .9
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lda wFirst+1
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cmp wLast+1
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bne .9
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jmp .1 ; wFirst == wLast, so go around one more time
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*--- Done with sequence, finish up ----
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.9
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>LDYA ZPPtrTerm ; set up terminating string
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jsr CS.PrintFEscYA ; print terminating string
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rts ; done with SEQ!
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* TODO: negatives in incr shouldn't be allowed.
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*--------------------------------------
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CS.PrintFEscYA jsr X.STRESC
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>PUSHYA
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>PUSHBI 0
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>SYSCALL PrintF
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rts
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*--------------------------------------
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* CS.DetermineDir - checks that increment value in relation +/- to
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* wFirst / wLast, and then sets the Direction flag.
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*--------------------------------------
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CS.DetermineDir jsr CS.CmpFirstLast ; compare first/last values
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bcc .1 ; if first < last, then we're counting forward
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lda #DIR_INCREMENT
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jmp .2
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.1 lda #DIR_DECREMENT
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.2 sta Direction ; set the direction
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rts ; and return to caller.
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*--------------------------------------
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* CS.CmpFirstLast - compares wFirst to wLast value and sets carry based on
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* if wFirst greater than or equal to wLast, or clear carry
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* if wFirst is less than wLast.
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*
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* IN: n/a (uses global wFirst/wLast)
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* OUT: carry flag; set if wFirst >= wLast, clear if wFirst < wLast.
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*--------------------------------------
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CS.CmpFirstLast >PUSHW wFirst ; using FPU macro, so push first,
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>PUSHW wLast ; and call the macro
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>FPU iGE
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lda (pStack) ; get result from stack
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bne .1 ; yes, wFirst is >= wLast
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>POP 2 ; wFirst < wLast
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sec ; return to caller with carry set
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rts
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.1 >POP 2 ; wFirst is >= wLast
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clc ; return to caller with carry clear
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rts
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*--------------------------------------
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.INB usr/src/shared/x.stresc.s
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*--------------------------------------
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CS.END
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*--------------------------------------
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MSG.USAGE .CS "Usage : SEQ [options] [first [incr]] last\r\n"
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.CS " -F fmt : numeric format\r\n"
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.CS " -S sep : string separator\r\n"
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.CZ " -T trm : terminating string\r\n"
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MSG.MSG.NEWLINE .CZ "\r\n"
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*--------------------------------------
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FMT.FORMAT .AZ "%I"
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FMT.STRING .CZ "\r\n"
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FMT.TERM .AZ ""
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*--------------------------------------
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OptionList .AS "FfSsTtHh"
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OptionVars .DA #bFormat,#bFormat,#bString,#bString,#bTerminating,#bTerminating,#bHelp,#bHelp
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*--------------------------------------
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.INB usr/src/shared/x.stresc.g
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*--------------------------------------
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* Per Process DATA segment (0 filled before INIT)
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*--------------------------------------
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.DUMMY
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.OR 0
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DS.START
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DS.END .ED
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*--------------------------------------
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MAN
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SAVE usr/src/bin/seq.s
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ASM
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