From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001 From: Angelos Mouzakitis Date: Tue, 10 Oct 2023 14:33:42 +0000 Subject: Add submodule dependency files Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec --- roms/skiboot/libc/string/memmove.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 roms/skiboot/libc/string/memmove.c (limited to 'roms/skiboot/libc/string/memmove.c') diff --git a/roms/skiboot/libc/string/memmove.c b/roms/skiboot/libc/string/memmove.c new file mode 100644 index 000000000..76aef6c87 --- /dev/null +++ b/roms/skiboot/libc/string/memmove.c @@ -0,0 +1,36 @@ +/****************************************************************************** + * 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 + +void *memcpy(void *dest, const void *src, size_t n); +void *memmove(void *dest, const void *src, size_t n); +void *memmove(void *dest, const void *src, size_t n) +{ + /* Do the buffers overlap in a bad way? */ + if (src < dest && src + n >= dest) { + char *cdest; + const char *csrc; + int i; + + /* Copy from end to start */ + cdest = dest + n - 1; + csrc = src + n - 1; + for (i = 0; i < n; i++) { + *cdest-- = *csrc--; + } + return dest; + } else { + /* Normal copy is possible */ + return memcpy(dest, src, n); + } +} -- cgit 1.2.3-korg