! _strncpy() Author: Kees J. Bot ! 1 Jan 1994 .sect .text; .sect .rom; .sect .data; .sect .bss ! char *_strncpy(char *s1, const char *s2, size_t ecx) ! Copy string s2 to s1. ! .sect .text .define __strncpy .align 16 __strncpy: mov edi, 12(ebp) ! edi = string s2 xorb al, al ! Look for a zero byte mov edx, ecx ! Save maximum count cld repne scasb ! Look for end of s2 sub edx, ecx ! Number of bytes in s2 including null xchg ecx, edx mov esi, 12(ebp) ! esi = string s2 mov edi, 8(ebp) ! edi = string s1 rep movsb ! Copy bytes ret