diff packages/language/c/libc/current/src/string/strcpy.cxx @ 0:3111d98ba7b3 ecos-v1_1-release

Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
parents
children 443894e2e912
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+//===========================================================================
+//
+//      strcpy.cxx
+//
+//      ANSI standard strcpy() routine
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// 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 Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jlarmour
+// Contributors:  jlarmour@cygnus.co.uk
+// Date:        1998-02-13
+// Purpose:     
+// Description: 
+// Usage:       
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>   // Configuration header
+
+// Include the C library?
+#ifdef CYGPKG_LIBC     
+
+// 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 "clibincl/stringsupp.hxx"  // Useful string function support and
+                                    // prototypes
+
+// EXPORTED SYMBOLS
+
+externC char *
+strcpy( char *s1, const char *s2 ) CYGPRI_LIBC_WEAK_ALIAS("_strcpy");
+
+// FUNCTIONS
+
+char *
+_strcpy( char *s1, const char *s2 )
+{
+    CYG_REPORT_FUNCNAMETYPE( "_strcpy", "returning addr %08x" );
+    CYG_REPORT_FUNCARG2( "s1=%08x, s2=%08x", s1, s2 );
+
+    CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" );
+    CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" );
+
+#if defined(CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST) || defined(__OPTIMIZE_SIZE__)
+    char *s = s1;
+    
+    while ((*s1++ = *s2++) != '\0')
+        ;
+
+    CYG_REPORT_RETVAL( s );
+    
+    return s;
+#else
+    char *dst = s1;
+    const char *src = s2;
+    CYG_WORD *aligned_dst;
+    const CYG_WORD *aligned_src;
+    
+    // If SRC or DEST is unaligned, then copy bytes.
+    if (CYG_LIBC_STR_UNALIGNED2 (src, dst))
+    {
+        while ((*dst++ = *src++) != '\0')
+            ;
+
+        CYG_REPORT_RETVAL( s1 );
+    
+        return s1;
+    }
+    
+    aligned_dst = (CYG_WORD *)dst;
+    aligned_src = (const CYG_WORD *)src;
+    
+    // SRC and DEST are both "CYG_WORD" aligned, try to do "CYG_WORD"
+    // sized copies.
+    while (!CYG_LIBC_STR_DETECTNULL(*aligned_src))
+    {
+        *aligned_dst++ = *aligned_src++;
+    }
+    
+    dst = (char*)aligned_dst;
+    src = (char*)aligned_src;
+    
+    while ((*dst++ = *src++) != '\0')
+           ;
+
+    CYG_REPORT_RETVAL( s1 );
+    
+    return s1;
+#endif // not defined(CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST) ||
+       //     defined(__OPTIMIZE_SIZE__)
+} // _strcpy()
+
+#endif // ifdef CYGPKG_LIBC     
+
+// EOF strcpy.cxx