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/* Optimized, inlined string functions. ARM version.
Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _STRING_H
# error "Never use <bits/string.h> directly; include <string.h> instead."
#endif
/* We must defeat the generic optimized versions of these functions in
<bits/string2.h> since they don't work on the ARM. */
#define _HAVE_STRING_ARCH_strcpy 1
#define _HAVE_STRING_ARCH_stpcpy 1
/* We only provide optimizations if GNU CC is used and this is a little
endian system (the code below does not work on big endian machines).
With current versions of GCC these optimi\ations produce quite a large
amount of code so we only enable them if the user specifically asked
for it. */
#if !defined __NO_STRING_INLINES && defined __GNUC__ && __GNUC__ >= 2 \
&& !defined __ARMEB__ && defined __USE_STRING_INLINES
/* Copy SRC to DEST. */
#define strcpy(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \
? __strcpy_small (dest, src, strlen (src) + 1) \
: (char *) memcpy (dest, src, strlen (src) + 1)) \
: strcpy (dest, src)))
#define __strcpy_small(dest, src, srclen) \
(__extension__ ({ char *__dest = (char *) (dest); \
const char *__src = (const char *) (src); \
size_t __srclen = (srclen); \
switch (__srclen) \
{ \
case 5: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 1: \
*__dest++ = '\0'; \
break; \
case 6: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 2: \
*((unsigned short int *) __dest) = \
__src[0]; \
__dest += 2; \
break; \
case 7: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 3: \
*((unsigned short int *) __dest) = \
*((const unsigned short int *) (__src)); \
__dest[2] = '\0'; \
__dest += 3; \
break; \
case 8: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 4: \
*((unsigned long int *) __dest) = \
*((const unsigned short int *) (__src)) | \
(__src[2] << 16); \
__dest += 4; \
break; \
} \
(__dest - __srclen) ; }))
/* Copy SRC to DEST, returning pointer to final NUL byte. */
#define __stpcpy(dest, src) \
(__extension__ (__builtin_constant_p (src) \
? (__string2_1bptr_p (src) && strlen (src) + 1 <= 8 \
? __stpcpy_small (dest, src, strlen (src) + 1) \
: ((char *) __mempcpy (dest, src, strlen (src) + 1) - 1))\
: __stpcpy (dest, src)))
#define __stpcpy_small(dest, src, srclen) \
(__extension__ ({ char *__dest = (char *) (dest); \
const char *__src = (const char *) (src); \
switch (srclen) \
{ \
case 5: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 1: \
*__dest++ = '\0'; \
break; \
case 6: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 2: \
*((unsigned short int *) __dest) = \
__src[0]; \
__dest += 2; \
break; \
case 7: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 3: \
*((unsigned short int *) __dest) = \
*((const unsigned short int *) (__src)); \
__dest[2] = '\0'; \
__dest += 3; \
break; \
case 8: \
*((unsigned long int *) __dest) = \
*((const unsigned long int *) (__src)); \
__dest += 4; \
__src += 4; \
case 4: \
*((unsigned long int *) __dest) = \
*((const unsigned short int *) (__src)) | \
(__src[2] << 16); \
__dest += 4; \
break; \
} \
__dest; }))
#endif
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