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/**
* slibc — Yet another C library
* Copyright © 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
/**
* Copy a memory segment to another, possibly overlapping, segment.
*
* @param whither The destination memory segment.
* @param whence The source memory segment.
* @param size The number of bytes to copy.
* @return `whither` is returned.
*/
void* memmove(void* whither, const void* whence, size_t size)
{
/* TODO improve implementation of memcpy */
char* d = whither;
const char* s = whence;
if ((size_t)(d - s) < size)
while (size--)
d[size] = s[size];
else
while (size--)
*d++ = *s++;
return whither;
}
/**
* Copy a memory segment to another, possibly overlapping, segment.
*
* This is a slibc extension added for completeness.
* It is only available if GNU extensions are available.
*
* @param whither The destination memory segment.
* @param whence The source memory segment.
* @param size The number of bytes to copy.
* @return `whither + size` is returned.
*/
void* mempmove(void* whither, const void* whence, size_t size)
{
return (char*)memmove(whither, whence, size) + size;
}
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