Mercurial > ecos
diff packages/language/c/libc/string/current/src/memmove.cxx @ 115:6ed91473a1cd ecos-sw-2000-08-21
Merge from eCos master repository on 2000-08-21-22:40:54-BST
| author | jlarmour |
|---|---|
| date | Fri, 25 Aug 2000 17:32:38 +0000 |
| parents | |
| children | 4c750ce71ae3 |
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new file mode 100644 --- /dev/null +++ b/packages/language/c/libc/string/current/src/memmove.cxx @@ -0,0 +1,102 @@ +//=========================================================================== +// +// memmove.cxx +// +// ANSI standard memmove() routine +// +//=========================================================================== +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Red Hat eCos Public License +// Version 1.1 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://www.redhat.com/ +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Configurable Operating System, +// released September 30, 1998. +// +// The Initial Developer of the Original Code is Red Hat. +// Portions created by Red Hat are +// Copyright (C) 1998, 1999, 2000 Red Hat, Inc. +// All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//=========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): jlarmour +// Contributors: +// Date: 2000-04-14 +// Purpose: +// Description: +// Usage: +// +//####DESCRIPTIONEND#### +// +//=========================================================================== + +// CONFIGURATION + +#include <pkgconf/libc_string.h> // Configuration header + +// INCLUDES + +#include <cyg/infra/cyg_type.h> // Common type definitions +#include <cyg/infra/cyg_trac.h> // Tracing support +#include <cyg/infra/cyg_ass.h> // Assertion support +#include <string.h> // Header for this file +#include <stddef.h> // Compiler definitions such as size_t, NULL etc. +#include <cyg/libc/string/stringsupp.hxx> // Useful string function support and + // prototypes + +// EXPORTED SYMBOLS + +externC void * +memmove( void *s1, const void *s2, size_t n ) \ + CYGBLD_ATTRIB_WEAK_ALIAS(__memmove); + +// FUNCTIONS + +void * +__memmove( void *s1, const void *s2, size_t n ) +{ + char *dst = (char *)s1; + const char *src = (const char *)s2; + + CYG_REPORT_FUNCNAMETYPE( "__memmove", "returning %08x" ); + CYG_REPORT_FUNCARG3( "s1=%08x, s2=%08x, n=%d", s1, s2, n ); + + CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" ); + CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" ); + + if ((src < dst) && (dst < (src + n))) + { + // Have to copy backwards + src += n; + dst += n; + while (n--) + { + *--dst = *--src; + } + } + else + { + while (n--) + { + *dst++ = *src++; + } + } + + CYG_REPORT_RETVAL( s1 ); + + return s1; +} // __memmove() + +// EOF memmove.cxx
