/* Determine the length of a string. For Intel 80x86, x>=3. Copyright (C) 1991,1992,1993,1996,1997,2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Torbjorn Granlund (tege@sics.se). The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <string.h> size_t strlen (const char *str) { int cnt; asm("cld\n" /* Search forward. */ /* Some old versions of gas need `repne' instead of `repnz'. */ "repnz\n" /* Look for a zero byte. */ "scasb" /* %0, %1, %3 */ : "=c" (cnt) : "D" (str), "0" (-1), "a" (0)); return -2 - cnt; } libc_hidden_builtin_def (strlen)