mirror of
https://github.com/cc65/cc65.git
synced 2024-11-03 10:07:02 +00:00
30 lines
569 B
ArmAsm
30 lines
569 B
ArmAsm
|
;
|
||
|
|
; Ullrich von Bassewitz, 17.05.2000
|
||
|
|
;
|
||
|
|
; char* __fastcall__ strerror (int errcode);
|
||
|
|
; /* Map an error number to an error message */
|
||
|
|
;
|
||
|
|
|
||
|
|
.export _strerror
|
||
|
|
.import __sys_errlist
|
||
|
|
|
||
|
|
.include "errno.inc"
|
||
|
|
|
||
|
|
_strerror:
|
||
|
|
cpx #$00 ; High byte must be zero
|
||
|
|
bne @L1 ; Jump if invalid error
|
||
|
|
cmp #EMAX ; Valid error code (map EUNKNOWN to 0)?
|
||
|
|
bcc @L2 ; Jump if ok
|
||
|
|
@L1: lda #$00 ; "Unknown error"
|
||
|
|
@L2: asl a ; * 2
|
||
|
|
tay
|
||
|
|
|
||
|
|
; Load the pointer to the error message and return
|
||
|
|
|
||
|
|
lda __sys_errlist+1,y
|
||
|
|
tax
|
||
|
|
lda __sys_errlist,y
|
||
|
|
rts
|
||
|
|
|
||
|
|
|