__seterrno is now a common function available on all platforms with slightly

different calling conventions.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3038 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/atari/graphics.s

@@ -11,7 +11,7 @@
 	.constructor	initscrmem,28
 
 	.import	findfreeiocb
-	.import	__seterrno,__do_oserror,__oserror
+	.import	__do_oserror,__oserror
 	.import	fddecusage
 	.import	clriocb
 	.import	fdtoiocb
@@ -46,7 +46,6 @@ parmok:	jsr	findfreeiocb
 	beq	iocbok		; we found one
 
 	lda	#<EMFILE	; "too many open files"
-	ldx	#>EMFILE
 seterr:	jsr	__seterrno
 	lda	#$FF
 	tax

libsrc/atari/lseek.s

@@ -10,7 +10,7 @@
  	.export		_lseek
 	.import		incsp6,__oserror
 	.import		__inviocb,ldax0sp,ldaxysp,fdtoiocb
-	.import		__seterrno,__dos_type
+	.import		__dos_type
 	.import		fd_table
 	.importzp	sreg,ptr1,ptr2,ptr3,ptr4
 	.importzp	tmp1,tmp2,tmp3
@@ -21,12 +21,10 @@
 ; seeking not supported, return -1 and ENOSYS errno value
 no_supp:jsr	incsp6
 	lda	#<ENOSYS
-	ldx	#>ENOSYS
-	jsr	__seterrno
-	ldx	#0
-	stx	__oserror
-	dex
-	txa
+	jsr	__seterrno      ; set __errno, return zero in A
+       	sta	__oserror
+	lda     #$FF
+	tax
 	sta	sreg
 	sta	sreg+1
 	rts

libsrc/atari/open.s

@@ -16,7 +16,7 @@
 	.import	clriocb
 	.import	fddecusage,newfd
 	.import	findfreeiocb
-	.import	__do_oserror,__seterrno,incsp4
+	.import	__do_oserror,incsp4
 	.import	ldaxysp,addysp
 	.import	__oserror
 	.importzp tmp4,tmp2
@@ -39,7 +39,6 @@ parmok:	jsr	findfreeiocb
 	beq	iocbok		; we found one
 
 	lda	#<EMFILE	; "too many open files"
-	ldx	#>EMFILE
 seterr:	jsr	__seterrno
 	jsr	incsp4		; clean up stack
 	lda	#$FF

libsrc/atari/rwcommon.s

@@ -1,4 +1,4 @@
-;				 
+;
 ; common iocb setup routine for read, write
 ; expects __fastcall__ parameters (int fd, void *buf, int count)
 ;
@@ -47,7 +47,7 @@ iocberr:jsr	incsp4		; pop args
 ; this routine updates errno.  do a JMP here right after calling
 ; CIOV.	 we expect status in Y.
 ;
-	.export __do_oserror,__seterrno,__inviocb
+	.export __do_oserror,__inviocb
 __do_oserror:
 	sty	__oserror	; save os dependent error code
 retminus:
@@ -55,17 +55,11 @@ retminus:
 	tax			; return -1
 	rts
 
-__seterrno:
-	sta	__errno
-	stx	__errno+1
-	rts
-
 ;
 ; sets EINVAL error code and returns -1
 ;
 
 __inviocb:
 	lda	#<EINVAL
-	ldx	#>EINVAL
 	jsr	__seterrno
 	jmp	retminus	; return -1