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;
; 2003-03-07, Ullrich von Bassewitz
; 2011-01-28, Stefan Haubenthal
; 2014-09-10, Greg King
;
; Set up arguments for main
;
.constructor initmainargs, 24
.import __argc, __argv
.import ptr1
.include "telestrat.inc"
.macpack generic
MAXARGS = 10 ; Maximum number of arguments allowed
; Assume that the program was loaded, a moment ago, by the traditional LOAD
; statement. Save the "most-recent filename" as argument #0.
initmainargs:
ldx #0 ; Limit the length
L0: lda BUFEDT,x
beq L3
cmp #' '
bne L1
lda #0
beq L3
L1: sta name,x
inx
cpx #FNAME_LEN
bne L0
lda #0
L3:
sta name,x
inc __argc ; argc always is equal to, at least, 1
ldy #1 * 2 ; Point to second argv slot
next: lda BUFEDT,x
beq done ; End of line reached
inx
cmp #' ' ; Skip leading spaces
beq next
found: cmp #'"' ; Is the argument quoted?
beq setterm ; Jump if so
dex ; Reset pointer to first argument character
lda #' ' ; A space ends the argument
setterm:sta term ; Set end of argument marker
; Now, store a pointer, to the argument, into the next slot.
txa ; Get low byte
clc
adc #<BUFEDT
bcc L4
inc L5+1
L4:
sta argv,y ; argv[y]=&arg
L5:
lda #>BUFEDT
sta argv+1,y
iny
iny
inc __argc ; Found another arg
; Search for the end of the argument
argloop:lda BUFEDT,x
beq done
inx
cmp term
bne argloop
; We've found the end of the argument. X points one character behind it, and
; A contains the terminating character. To make the argument a valid C string,
; replace the terminating character by a zero.
lda #0
sta BUFEDT-1,x
; Check if the maximum number of command line arguments is reached. If not,
; parse the next one.
lda __argc ; Get low byte of argument count
cmp #MAXARGS ; Maximum number of arguments reached?
bcc next ; Parse next one if not
done: lda #<argv
ldx #>argv
sta __argv
stx __argv + 1
rts
.segment "INIT"
term: .res 1
.data
name: .res FNAME_LEN + 1
args: .res SCREEN_XSIZE * 2 - 1
param_found:
.res 1
; char* argv[MAXARGS+1]={name};
argv:
.addr name
.res MAXARGS * 2