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//===========================================================================

//

//      bsdstring.cxx

//

//      BSD string routines

//

//===========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 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.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//===========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     jlarmour

// Contributors:  

// Date:          2001-11-27

// Purpose:       Provide string functions derived from BSD

// Description: 

// Usage:         #include <string.h>

//

//####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>                // size_t, NULL etc.

#include <ctype.h>                 // toupper/tolower

// FUNCTIONS

/*---------------------------------------------------------------------*/

/* strcasecmp */

__externC int

__strcasecmp( const char *s1, const char *s2 )

{

    CYG_REPORT_FUNCNAMETYPE( "strcasecmp", "returning %d" );

    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!" );

    while (*s1 != '\0' && tolower(*s1) == tolower(*s2))

    {

        s1++;

        s2++;

    }

    int ret = tolower(*(unsigned char *) s1) - tolower(*(unsigned char *) s2);

    CYG_REPORT_RETVAL( ret );

    return ret;

}

__externC int

strcasecmp( const char *s1, const char *s2 ) \

  CYGBLD_ATTRIB_WEAK_ALIAS(__strcasecmp);

/*---------------------------------------------------------------------*/

/* strncasecmp */

__externC int

__strncasecmp( const char *s1, const char *s2, size_t n )

{

    CYG_REPORT_FUNCNAMETYPE( "strncasecmp", "returning %d" );

    CYG_REPORT_FUNCARG3( "s1=%08x, s2=%08x, n=%d", s1, s2, n );

    if (n == 0)

    {

        CYG_REPORT_RETVAL(0);

        return 0;

    }

    CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" );

    CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" );

    while (n-- != 0 && tolower(*s1) == tolower(*s2))

    {

        if (n == 0 || *s1 == '\0' || *s2 == '\0')

            break;

        s1++;

        s2++;

    }

    int ret = tolower(*(unsigned char *) s1) - tolower(*(unsigned char *) s2);

    CYG_REPORT_RETVAL( ret );

    return ret;

}

__externC int

strncasecmp( const char *s1, const char *s2, size_t n ) \

  CYGBLD_ATTRIB_WEAK_ALIAS(__strncasecmp);

/*---------------------------------------------------------------------*/

/* bcmp */

__externC int

__bcmp( const void *s1, const void *s2, size_t n )

{

    // Don't bother tracing - memcmp can do that

    return memcmp (s1, s2, n);

}

__externC int

bcmp( const void *s1, const void *s2, size_t n ) \

  CYGBLD_ATTRIB_WEAK_ALIAS(__bcmp);

/*---------------------------------------------------------------------*/

/* bcopy */

__externC void

__bcopy( const void *src, void *dest, size_t n )

{

    // Don't bother tracing - memmove can do that

    memmove (dest, src, n);

}

__externC void

bcopy( const void *src, void *dest, size_t n ) \

  CYGBLD_ATTRIB_WEAK_ALIAS(__bcopy);

/*---------------------------------------------------------------------*/

/* bzero */

__externC void

__bzero( void *s, size_t n )

{

    // Don't bother tracing - memset can do that

    memset( s, 0, n );

}

__externC void

bzero( void *s, size_t n ) CYGBLD_ATTRIB_WEAK_ALIAS(__bzero);

/*---------------------------------------------------------------------*/

/* index */

__externC char *

__index( const char *s, int c )

{

    // Don't bother tracing - strchr can do that

    return strchr(s, c);

}

__externC char *

index( const char *s, int c ) CYGBLD_ATTRIB_WEAK_ALIAS(__index);

/*---------------------------------------------------------------------*/

/* rindex */

__externC char *

__rindex( const char *s, int c )

{

    // Don't bother tracing - strrchr can do that

    return strrchr(s, c);

}

__externC char *

rindex( const char *s, int c ) CYGBLD_ATTRIB_WEAK_ALIAS(__rindex);

/*---------------------------------------------------------------------*/

/* swab */

__externC void

__swab( const void *from, void *to, size_t n )

{

    const char *f = (const char *)from;

    char *t = (char *)to;

    size_t ptr;

    CYG_REPORT_FUNCNAME( "swab" );

    CYG_REPORT_FUNCARG3( "from=%08x, to=%08x, n=%d", from, to, n );

    if (n) {

        CYG_CHECK_DATA_PTR( from, "from is not a valid pointer!" );

        CYG_CHECK_DATA_PTR( to, "to is not a valid pointer!" );

    }

    for (ptr = 1; ptr < n; ptr += 2)

    {

        char p = f[ptr];

        char q = f[ptr-1];

        t[ptr-1] = p;

        t[ptr  ] = q;

    }

    if (ptr == n)          /* I.e., if n is odd, */

        t[ptr-1] = '\0';   /* then pad with a NUL. */

    CYG_REPORT_RETURN();

}

__externC void

swab( const void *from, void *to, size_t n ) \

  CYGBLD_ATTRIB_WEAK_ALIAS(__swab);

/*---------------------------------------------------------------------*/

// EOF bsdstring.cxx