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skrzyp |
//===========================================================================
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//
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// strlen.cxx
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//
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// ANSI standard strlen() routine
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//
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//===========================================================================
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// ####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public License.
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// -------------------------------------------
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// ####ECOSGPLCOPYRIGHTEND####
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//===========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): jlarmour
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// Contributors: nickg
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// Date: 2000-04-14
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// Purpose:
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// Description: strlen() function, to satisfy C++ runtime needs. This
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// function functions correctly, but in the interests of
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// keeping code size down, it uses the smallest implementation
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// possible, and is consequently not very fast.
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// Usage:
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//
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//####DESCRIPTIONEND####
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//
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//===========================================================================
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// CONFIGURATION
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#include <pkgconf/system.h> // Configuration header
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#include <pkgconf/infra.h> // Configuration header
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//==========================================================================
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// INCLUDES
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#include <cyg/infra/cyg_type.h> // Common type definitions
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#include <cyg/infra/cyg_trac.h> // Tracing support
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#include <cyg/infra/cyg_ass.h> // Assertion support
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#include <stddef.h> // Compiler definitions such as size_t, NULL etc.
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//==========================================================================
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// EXPORTED SYMBOLS
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extern "C" size_t
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strlen( const char *s ) CYGBLD_ATTRIB_WEAK_ALIAS(__strlen);
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//==========================================================================
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// FUNCTIONS
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extern "C" size_t
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__strlen( const char *s )
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{
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int retval;
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CYG_REPORT_FUNCNAMETYPE( "__strlen", "returning length %d" );
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CYG_REPORT_FUNCARG1( "s=%08x", s );
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CYG_CHECK_DATA_PTR( s, "s is not a valid pointer!" );
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const char *start = s;
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while (*s)
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s++;
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retval = s - start;
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CYG_REPORT_RETVAL( retval );
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return retval;
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} // __strlen()
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//==========================================================================
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// EOF strlen.cxx
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