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/*
strcat_P.S
Contributors:
Created by Reiner Patommel
THIS SOFTWARE IS NOT COPYRIGHTED
This source code is offered for use in the public domain. You may
use, modify or distribute it freely.
This code is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
DISCLAIMED. This includes but is not limited to warranties of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "macros.inc"
#define dest_hi r25
#define dest_lo r24
#define src_hi r23
#define src_lo r22
; char *strcat_P(char *dest, const char flash *src)
.text
.global _U(strcat_P)
.type _U(strcat_P), @function
_U(strcat_P):
LOAD_Z(src_lo, src_hi)
LOAD_X(dest_lo, dest_hi)
.strcat_P_skip:
ld __tmp_reg__, X+
tst __tmp_reg__
brne .strcat_P_skip
sbiw XL, 1 ; undo post-increment
.strcat_P_loop:
LPM_R0_ZP
st X+, r0
tst r0
brne .strcat_P_loop
; return dest (unchanged)
ret
.strcat_P_end:
.size _U(strcat_P), .strcat_P_end - _U(strcat_P)
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