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mescc: Mes C Library: Support ARM tcc: Add __memmove.

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* lib/string/__memmove.c: New file.
* include/mes/lib.h (__memmove): Add prototype.
This commit is contained in:
Jan (janneke) Nieuwenhuizen 2020-11-22 20:42:49 +01:00
parent bebb8dabfb
commit 82a2388db2
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2 changed files with 34 additions and 0 deletions
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1
include/mes/lib.h
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@ -72,5 +72,6 @@ unsigned long __mesabi_umod (unsigned long a, unsigned long b);
unsigned long __mesabi_udiv (unsigned long a, unsigned long b); unsigned long __mesabi_udiv (unsigned long a, unsigned long b);
void *__memcpy (void *dest, void const *src, size_t n); void *__memcpy (void *dest, void const *src, size_t n);
void *__memmove (void *dest, void const *src, size_t n);
#endif //__MES_LIB_H #endif //__MES_LIB_H

33
lib/string/__memmove.c Normal file
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@ -0,0 +1,33 @@
/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mes/lib.h>
void *
__memmove (void *dest, void const *src, size_t n)
{
if (dest < src)
return __memcpy (dest, src, n);
char *p = dest + n;
char const *q = src + n;
while (n--)
*--p = *--q;
return dest;
}