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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-07-02 15:36:20 +1000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-07-02 15:36:20 +1000 |
commit | 1d880992fd8c8457a2d990ac6622cfd58fb1b261 (patch) | |
tree | c4c843b12e96b5612c315db5a23c5da1a900618c /libc/string/memmove.c | |
download | skiboot-1d880992fd8c8457a2d990ac6622cfd58fb1b261.zip skiboot-1d880992fd8c8457a2d990ac6622cfd58fb1b261.tar.gz skiboot-1d880992fd8c8457a2d990ac6622cfd58fb1b261.tar.bz2 |
Initial commit of Open Source release
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'libc/string/memmove.c')
-rw-r--r-- | libc/string/memmove.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/libc/string/memmove.c b/libc/string/memmove.c new file mode 100644 index 0000000..3acf1a9 --- /dev/null +++ b/libc/string/memmove.c @@ -0,0 +1,42 @@ +/****************************************************************************** + * Copyright (c) 2004, 2008 IBM Corporation + * All rights reserved. + * This program and the accompanying materials + * are made available under the terms of the BSD License + * which accompanies this distribution, and is available at + * http://www.opensource.org/licenses/bsd-license.php + * + * Contributors: + * IBM Corporation - initial implementation + *****************************************************************************/ + +#include "string.h" + + +void * +memmove(void *dest, const void *src, size_t n) +{ + char *cdest; + const char *csrc; + int i; + + /* Do the buffers overlap in a bad way? */ + if (src < dest && src + n >= dest) { + /* Copy from end to start */ + cdest = dest + n - 1; + csrc = src + n - 1; + for (i = 0; i < n; i++) { + *cdest-- = *csrc--; + } + } + else { + /* Normal copy is possible */ + cdest = dest; + csrc = src; + for (i = 0; i < n; i++) { + *cdest++ = *csrc++; + } + } + + return dest; +} |