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/*

 * assoc.c

 *      rtems assoc routines

 *

 *  $Id: assoc.c,v 1.2 2001-09-27 12:01:15 chris Exp $

 */

#include <rtems.h>

#include "assoc.h"

#include <string.h>             /* strcat, strcmp */

#define STREQ(a,b)      (strcmp((a), (b)) == 0)

#define rtems_assoc_is_default(ap)  ((ap)->name && STREQ(ap->name, RTEMS_ASSOC_DEFAULT_NAME))

const rtems_assoc_t *

rtems_assoc_ptr_by_name(

    const rtems_assoc_t *ap,

    const char *name

  )

{

    const rtems_assoc_t *default_ap = 0;

    if (rtems_assoc_is_default(ap))

        default_ap = ap++;

    for ( ; ap->name; ap++)

        if (strcmp(ap->name, name) == 0)

            return ap;

    return default_ap;

}

const rtems_assoc_t *

rtems_assoc_ptr_by_local(

    const rtems_assoc_t *ap,

    unsigned32     local_value

  )

{

    const rtems_assoc_t *default_ap = 0;

    if (rtems_assoc_is_default(ap))

        default_ap = ap++;

    for ( ; ap->name; ap++)

        if (ap->local_value == local_value)

            return ap;

    return default_ap;

}

const rtems_assoc_t *

rtems_assoc_ptr_by_remote(

    const rtems_assoc_t *ap,

    unsigned32     remote_value

  )

{

    const rtems_assoc_t *default_ap = 0;

    if (rtems_assoc_is_default(ap))

        default_ap = ap++;

    for ( ; ap->name; ap++)

        if (ap->remote_value == remote_value)

            return ap;

    return default_ap;

}

/*

 * Get values

 */

unsigned32

rtems_assoc_remote_by_local(

    const rtems_assoc_t *ap,

    unsigned32     local_value

  )

{

    const rtems_assoc_t *nap;

    nap = rtems_assoc_ptr_by_local(ap, local_value);

    if (nap)

        return nap->remote_value;

    return 0;

}

unsigned32

rtems_assoc_local_by_remote(

    const rtems_assoc_t *ap,

    unsigned32     remote_value

  )

{

    const rtems_assoc_t *nap;

    nap = rtems_assoc_ptr_by_remote(ap, remote_value);

    if (nap)

        return nap->local_value;

    return 0;

}

unsigned32

rtems_assoc_remote_by_name(

    const rtems_assoc_t *ap,

    const char          *name

  )

{

    const rtems_assoc_t *nap;

    nap = rtems_assoc_ptr_by_name(ap, name);

    if (nap)

        return nap->remote_value;

    return 0;

}

unsigned32

rtems_assoc_local_by_name(

    const rtems_assoc_t *ap,

    const char          *name

  )

{

    const rtems_assoc_t *nap;

    nap = rtems_assoc_ptr_by_name(ap, name);

    if (nap)

        return nap->local_value;

    return 0;

}

/*

 * what to return if a value is not found

 * this is not reentrant, but it really shouldn't be invoked anyway

 */

const char *rtems_assoc_name_bad(

    unsigned32 bad_value

);

/* body in separate file to reduce dependency on printf */

const char *

rtems_assoc_name_by_local(

    const rtems_assoc_t *ap,

    unsigned32     local_value

  )

{

    const rtems_assoc_t *nap;

    nap = rtems_assoc_ptr_by_local(ap, local_value);

    if (nap)

        return nap->name;

    return rtems_assoc_name_bad(local_value);

}

const char *

rtems_assoc_name_by_remote(

    const rtems_assoc_t *ap,

    unsigned32     remote_value

  )

{

    const rtems_assoc_t *nap;

    nap = rtems_assoc_ptr_by_remote(ap, remote_value);

    if (nap)

        return nap->name;

    return rtems_assoc_name_bad(remote_value);

}

/*

 * Bitfield functions assume just 1 bit set in each of remote and local

 *      entries; they do not check for this.

 */

unsigned32 rtems_assoc_remote_by_local_bitfield(

    const rtems_assoc_t *ap,

    unsigned32     local_value

  )

{

    unsigned32 b;

    unsigned32 remote_value = 0;

    for (b = 1; b; b <<= 1)

        if (b & local_value)

            remote_value |= rtems_assoc_remote_by_local(ap, b);

    return remote_value;

}

unsigned32 rtems_assoc_local_by_remote_bitfield(

    const rtems_assoc_t *ap,

    unsigned32     remote_value

  )

{

    unsigned32 b;

    unsigned32 local_value = 0;

    for (b = 1; b; b <<= 1)

        if (b & remote_value)

            local_value |= rtems_assoc_local_by_remote(ap, b);

    return local_value;

}

char *

rtems_assoc_name_by_remote_bitfield(

    const rtems_assoc_t *ap,

    unsigned32     value,

    char          *buffer

  )

{

    unsigned32 b;

    *buffer = 0;

    for (b = 1; b; b <<= 1)

        if (b & value)

        {

            if (*buffer)

                strcat(buffer, " ");

            strcat(buffer, rtems_assoc_name_by_remote(ap, b));

        }

    return buffer;

}

char *

rtems_assoc_name_by_local_bitfield(

    const rtems_assoc_t *ap,

    unsigned32     value,

    char          *buffer

  )

{

    unsigned32 b;

    *buffer = 0;

    for (b = 1; b; b <<= 1)

        if (b & value)

        {

            if (*buffer)

                strcat(buffer, " ");

            strcat(buffer, rtems_assoc_name_by_local(ap, b));

        }

    return buffer;

}