source: rtems/cpukit/libcsupport/src/assoc32tostring.c

/* SPDX-License-Identifier: BSD-2-Clause */

/*
 * Copyright (c) 2016 embedded brains GmbH & Co. KG
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/assoc.h>

#include <stdbool.h>
#include <string.h>

static size_t space( size_t buffer_size, size_t len )
{
  if ( len < buffer_size ) {
    return buffer_size - len;
  } else {
    return 0;
  }
}

size_t rtems_assoc_32_to_string(
  uint32_t                   value,
  char                      *buffer,
  size_t                     buffer_size,
  const rtems_assoc_32_pair *pairs,
  size_t                     pair_count,
  const char                *separator,
  const char                *fallback
)
{
  size_t len;
  size_t i;

  len = 0;

  for ( i = 0; i < pair_count ; ++i ) {
    const rtems_assoc_32_pair *p;

    p = &pairs[ i ];

    if ( ( value & p->bits ) != 0 ) {
      if ( len > 0 ) {
        len += strlcpy( &buffer[ len ], separator, space( buffer_size, len ) );
      }

      len += strlcpy( &buffer[ len ], p->name, space( buffer_size, len ) );
    }
  }

  if ( len == 0 ) {
    len += strlcpy( buffer, fallback, buffer_size );
  }

  return len;
}