| 0,0 → 1,43 |
|---|
| # _strncat() Author: Kees J. Bot |
| # 1 Jan 1994 |
| # char *_strncat(char *s1, const char *s2, size_t edx) |
| # Append string s2 to s1. |
| # |
| |
| .intel_syntax |
| |
| .global __strncat |
| |
| .text |
| .align 16 |
| __strncat: |
| push ebp |
| mov ebp, esp |
| push esi |
| push edi |
| mov edi, [ebp+8] # String s1 |
| mov ecx, -1 |
| xorb al, al # Null byte |
| cld |
| repne |
| scasb # Look for the zero byte in s1 |
| dec edi # Back one up (and clear 'Z' flag) |
| push edi # Save end of s1 |
| mov edi, [12+ebp] # edi = string s2 |
| mov ecx, edx # Maximum count |
| repne |
| scasb # Look for the end of s2 |
| jne no0 |
| inc ecx # Exclude null byte |
| no0: sub edx, ecx # Number of bytes in s2 |
| mov ecx, edx |
| mov esi, [12+ebp] # esi = string s2 |
| pop edi # edi = end of string s1 |
| rep |
| movsb # Copy bytes |
| stosb # Add a terminating null |
| mov eax, [8+ebp] # Return s1 |
| pop edi |
| pop esi |
| pop ebp |
| ret |