; - The "file-name" might be a path-name; don't copy the directory-components.
; - Add a control-character quoting mechanism.
- .constructor initmainargs, 24
- .import __argc, __argv
+ .constructor initmainargs, 24
+ .import __argc, __argv
- .include "c128.inc"
+ .include "cbm_kernal.inc"
+ .include "c128.inc"
-MAXARGS = 10 ; Maximum number of arguments allowed
-REM = $8f ; BASIC token-code
-NAME_LEN = 16 ; maximum length of command-name
+MAXARGS = 10 ; Maximum number of arguments allowed
+REM = $8f ; BASIC token-code
+NAME_LEN = 16 ; Maximum length of command-name
-
-; Get possible command-line arguments. Goes into the special INIT segment,
+; Get possible command-line arguments. Goes into the special ONCE segment,
; which may be reused after the startup code is run
-.segment "INIT"
+.segment "ONCE"
initmainargs:
; Assume that the program was loaded, a moment ago, by the traditional LOAD
; statement. Save the "most-recent filename" as argument #0.
-; Because the buffer, that we're copying into, was zeroed out,
-; we don't need to add a NUL character.
-;
- ldy FNAM_LEN
- cpy #NAME_LEN + 1
- bcc L1
- ldy #NAME_LEN - 1 ; limit the length
+
+ lda #0 ; The terminating NUL character
+ ldy FNAM_LEN
+ cpy #NAME_LEN + 1
+ bcc L1
+ ldy #NAME_LEN ; Limit the length
+ bne L1 ; Branch always
L0: lda #FNAM ; Load vector address for FETCH routine
ldx FNAM_BANK ; Load bank for FETCH routine
jsr INDFET ; Load byte from (FETVEC),y
- sta name,y ; Save byte from filename
-L1: dey
- bpl L0
- inc __argc ; argc always is equal to, at least, 1
+L1: sta name,y ; Save byte from filename
+ dey
+ bpl L0
+ inc __argc ; argc always is equal to, at least, 1
; Find the "rem" token.
-;
- ldx #0
-L2: lda BASIC_BUF,x
- beq done ; no "rem," no args.
- inx
- cmp #REM
- bne L2
- ldy #1 * 2
+
+ ldx #0
+L2: lda BASIC_BUF,x
+ beq done ; No "rem," no args.
+ inx
+ cmp #REM
+ bne L2
+ ldy #1 * 2
; Find the next argument
beq done ; End of line reached
inx
cmp #' ' ; Skip leading spaces
- beq next ;
+ beq next
; Found start of next argument. We've incremented the pointer in X already, so
; it points to the second character of the argument. This is useful since we
; necessary.
txa ; Get low byte
- sta argv,y ; argv[y]= &arg
- iny
- lda #>BASIC_BUF
- sta argv,y
- iny
+ sta argv,y ; argv[y]= &arg
+ iny
+ lda #>BASIC_BUF
+ sta argv,y
+ iny
inc __argc ; Found another arg
; Search for the end of the argument
; (The last vector in argv[] already is NULL.)
-done: lda #<argv
- ldx #>argv
- sta __argv
- stx __argv + 1
- rts
+done: lda #<argv
+ ldx #>argv
+ sta __argv
+ stx __argv + 1
+ rts
-; These arrays are zeroed before initmainargs is called.
-; char name[16+1];
-; char* argv[MAXARGS+1]={name};
-;
-.bss
-term: .res 1
-name: .res NAME_LEN + 1
+.segment "INIT"
+
+term: .res 1
+name: .res NAME_LEN + 1
.data
-argv: .addr name
- .res MAXARGS * 2
+; char* argv[MAXARGS+1]={name};
+argv: .addr name
+ .res MAXARGS * 2