1 //===========================================================================
5 // ANSI standard strlen() routine
7 //===========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
12 // Copyright (C) 2003 Nick Garnett <nickg@calivar.com>
14 // eCos is free software; you can redistribute it and/or modify it under
15 // the terms of the GNU General Public License as published by the Free
16 // Software Foundation; either version 2 or (at your option) any later version.
18 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
19 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
23 // You should have received a copy of the GNU General Public License along
24 // with eCos; if not, write to the Free Software Foundation, Inc.,
25 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
27 // As a special exception, if other files instantiate templates or use macros
28 // or inline functions from this file, or you compile this file and link it
29 // with other works to produce a work based on this file, this file does not
30 // by itself cause the resulting work to be covered by the GNU General Public
31 // License. However the source code for this file must still be made available
32 // in accordance with section (3) of the GNU General Public License.
34 // This exception does not invalidate any other reasons why a work based on
35 // this file might be covered by the GNU General Public License.
37 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
38 // at http://sources.redhat.com/ecos/ecos-license/
39 // -------------------------------------------
40 //####ECOSGPLCOPYRIGHTEND####
41 //===========================================================================
42 //#####DESCRIPTIONBEGIN####
44 // Author(s): jlarmour
45 // Contributors: nickg
48 // Description: strlen() function, to satisfy C++ runtime needs. This
49 // function functions correctly, but in the interests of
50 // keeping code size down, it uses the smallest implementation
51 // possible, and is consequently not very fast.
54 //####DESCRIPTIONEND####
56 //===========================================================================
60 #include <pkgconf/system.h> // Configuration header
61 #include <pkgconf/infra.h> // Configuration header
63 //==========================================================================
66 #include <cyg/infra/cyg_type.h> // Common type definitions
67 #include <cyg/infra/cyg_trac.h> // Tracing support
68 #include <cyg/infra/cyg_ass.h> // Assertion support
69 #include <stddef.h> // Compiler definitions such as size_t, NULL etc.
71 //==========================================================================
75 strlen( const char *s ) CYGBLD_ATTRIB_WEAK_ALIAS(__strlen);
77 //==========================================================================
81 __strlen( const char *s )
85 CYG_REPORT_FUNCNAMETYPE( "__strlen", "returning length %d" );
86 CYG_REPORT_FUNCARG1( "s=%08x", s );
88 CYG_CHECK_DATA_PTR( s, "s is not a valid pointer!" );
90 const char *start = s;
97 CYG_REPORT_RETVAL( retval );
103 //==========================================================================