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[/] [trunk/] [modules/] [messages/] [getmsg.asm] - Rev 255

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;The MIT License
;
;Copyright (c) 2009 Dylan Smith
;
;Permission is hereby granted, free of charge, to any person obtaining a copy
;of this software and associated documentation files (the "Software"), to deal
;in the Software without restriction, including without limitation the rights
;to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
;copies of the Software, and to permit persons to whom the Software is
;furnished to do so, subject to the following conditions:
;
;The above copyright notice and this permission notice shall be included in
;all copies or substantial portions of the Software.
;
;THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
;AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
;OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
;THE SOFTWARE.

; Get an error message.
F_getmessage
        ld a, l                 ; Get message ID from caller.

        ld hl, STR_SUCCESS      ; pointer at start of table
        and a                   ; code 0 (success?)
        ret z                   ; return now.
        push de                 ; Save destination address
        ld d, a                 ; set counter
        xor a                   ; reset A to search for terminator
        ld bc, ERR_TABLE_END - STR_SUCCESS
.findloop
        cpir                    ; find next null
        jp po, .nomsg           ; cpir ran out of data?
        dec d                   ; decrement loop counter
        jr nz, .findloop        ; if Z is not set go for another run

        pop de                  ; get destination address back
        xor a
.strcpy
        ldi
        cp (hl)                 ; End of the string?
        jr nz, .strcpy
        ld (de), a              ; stick the null on the end
        ret

.nomsg
        pop de
        scf
        ret

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