kvisc/ka/crt/str/strcpy.k

; The OS/K Team licenses this file to you under the MIT license.
; See the LICENSE file in the project root for more information.

;
; void strcpy(char *, const char *)
;
strcpy:
    mov rcx, STRLEN_MAX
    movsb.rep.nz ax0, ax1
    ret

;
; void strncpy(char *, const char *, int)
;
strncpy:
    mov rcx, ax2
    ret.cxz

    movsb.rep.nz ax0, ax1
    ret

;
; void strnzcpy(char *, const char *, int)
;
strnzcpy:
    mov rcx, ax2
    ret.cxz

    dec rcx
    jmp.cxz .1

    movsb.rep.nz ax0, ax1

.1:
    mov b[ax0], zero
    ret