| /* Copyright (c) 2007 Dmitry Xmelkov |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in |
| the documentation and/or other materials provided with the |
| distribution. |
| * Neither the name of the copyright holders nor the names of |
| contributors may be used to endorse or promote products derived |
| from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. */ |
| |
| /* $Id: strchrnul_P.S 2191 2010-11-05 13:45:57Z arcanum $ */ |
| |
| /** \file */ |
| /** \ingroup avr_pgmspace |
| \fn PGM_P strchrnul_P(PGM_P s, int c) |
| |
| The strchrnul_P() function is like strchr_P() except that if \p c is |
| not found in \p s, then it returns a pointer to the null byte at the |
| end of \p s, rather than \c NULL. (Glibc, GNU extension.) |
| |
| \return The strchrnul_P() function returns a pointer to the matched |
| character, or a pointer to the null byte at the end of \p s (i.e., |
| \c s+strlen(s)) if the character is not found. */ |
| |
| #if !defined(__AVR_TINY__) |
| |
| #if !defined(__DOXYGEN__) |
| |
| #include "asmdef.h" |
| |
| #define src_lo r24 |
| #define val r22 |
| |
| #define ret_lo r24 |
| |
| ENTRY strchrnul_P |
| X_movw ZL, src_lo |
| |
| 1: X_lpm r0, Z+ |
| cp r0, val |
| cpse r0, __zero_reg__ |
| brne 1b |
| |
| sbiw ZL, 1 ; undo post-increment |
| X_movw ret_lo, ZL |
| ret |
| ENDFUNC |
| |
| #endif /* not __DOXYGEN__ */ |
| |
| #endif /* !defined(__AVR_TINY__) */ |