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/*===========================================================================
//
// gccsupport.cxx
//
// Miscellaneous generic support functions required by GCC
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2004, 2005, 2008 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): jlarmour
// Contributors:
// Date: 2005-03-06
// Purpose: This file provides miscellaneous support functions that have
// been assumed to be present by GCC.
// Description: These functions and definitions are usually defaults
// for when the "real" implementation does not exist.
// These are intentionally very basic implementations. Users
// should pull in the real implementations from other packages
// rather than these. These are purely here for GCC's
// requirements and nothing more.
//
//####DESCRIPTIONEND####
//
//==========================================================================*/
/* INCLUDES */
#include <pkgconf/infra.h> /* Configuration of infra package */
#include <pkgconf/isoinfra.h> /* Configuration of isoinfra package */
#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 <stddef.h> /* Compiler defns such as size_t, NULL etc. */
#include <stdio.h>
#include <cyg/infra/diag.h> /* Diagnostic output */
/* GLOBALS */
#ifndef CYGINT_ISO_STDIO_FILETYPES
typedef long FILE;
#endif
#ifndef CYGINT_ISO_STDIO_STREAMS
FILE *stdout, *stderr; /* In practice, ignored */
#endif
/* FUNCTIONS */
#ifndef CYGINT_ISO_STDIO_CHAR_IO
__externC int
fputs( const char *string, FILE * /* ignored */ ) __THROW
{
diag_write_string( string );
return 0;
}
__externC int
fputc( int c, FILE * /* ignored */ ) __THROW
{
diag_write_char( (char)c );
return c;
}
#endif
#ifndef CYGINT_ISO_STDIO_DIRECT_IO
/* Recent GCC can "optimise" fputs(string, stream)
* to fwrite(string, 1, len, stream).
* No idea why they think that's a good idea though! */
__externC size_t
fwrite( const void *ptr, size_t object_size, size_t num_objects,
FILE * /* ignored */ ) __THROW
{
const char *str = static_cast<const char *>(ptr);
/* double check GCC use before assuming. Hmm, is it possible
* GCC could optimise away the terminating NULL?
*/
if (object_size == 1 && str[num_objects] == '\0')
diag_write_string( str );
else
return 0;
return num_objects;
}
#endif
#ifndef CYGINT_ISO_STRING_MEMFUNCS
__externC int
memcmp( const void *s1, const void *s2, size_t n )
{
const unsigned char *m1 = (const unsigned char *) s1;
const unsigned char *m2 = (const unsigned char *) s2;
while (n--)
{
if (*m1 != *m2)
{
return *m1 - *m2;
}
m1++;
m2++;
}
return 0;
} // memcmp()
#endif
#ifndef CYGINT_ISO_STRING_STRFUNCS
__externC int
strncmp( const char *s1, const char *s2, size_t n )
{
if (n == 0)
{
return 0;
}
while (n-- != 0 && *s1 == *s2)
{
if (n == 0 || *s1 == '\0' || *s2 == '\0')
break;
s1++;
s2++;
}
return (*(unsigned char *) s1) - (*(unsigned char *) s2);
} // strncmp()
__externC int
strcmp( const char *s1, const char *s2 )
{
// Could do simple and direct implementation, but smaller is better
return strncmp( s1, s2, (size_t)-1 );
} // strcmp()
__externC char *
strcat( char *s1, const char *s2 )
{
char *s = s1;
while (*s1)
s1++;
while ((*s1++ = *s2++))
;
return s;
} // strcat()
__externC char *
strcpy( char *s1, const char *s2 )
{
char *s = s1;
while ((*s1++ = *s2++) != '\0')
;
return s;
} // strcpy()
#endif
/* EOF gccsupport.cxx */
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