path: root/cpukit/libblock/src/media-path.c

/**
 * @file
 *
 * @ingroup RTEMSMedia
 *
 * @brief Media implementation.
 */

/*
 * Copyright (c) 2009, 2010 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Obere Lagerstr. 30
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <assert.h>

#include <rtems/media.h>

char *rtems_media_create_path(
  const char *prefix,
  const char *name,
  rtems_device_major_number major
)
{
  size_t const size = strlen(prefix) + 1 + strlen(name) + 1 + 10 + 1;
  char *const s = malloc(size);

  if (s != NULL) {
#ifndef NDEBUG
    int rv = 
#endif
    snprintf(s, size, "%s/%s-%" PRIu32, prefix, name, major);
    assert(rv < (int) size);
  }

  return s;
}

char *rtems_media_replace_prefix(const char *new_prefix, const char *path)
{
  const char *const name_try = strrchr(path, '/');
  const char *const name = (name_try == NULL) ? path : name_try + 1;
  size_t const new_prefix_len = strlen(new_prefix);
  size_t const name_size = strlen(name) + 1;
  size_t const size = new_prefix_len + 1 + name_size;
  char *const s = malloc(size);

  if (s != NULL) {
    memcpy(s, new_prefix, new_prefix_len);
    s [new_prefix_len] = '/';
    memcpy(s + new_prefix_len + 1, name, name_size);
  }

  return s;
}

char *rtems_media_append_minor(
  const char *path,
  rtems_device_minor_number minor
)
{
  size_t const size = strlen(path) + 1 + 10 + 1;
  char *const s = malloc(size);

  if (s != NULL) {
#ifndef NDEBUG
    int rv = 
#endif
    snprintf(s, size, "%s-%" PRIu32, path, minor);
    assert(rv < (int) size);
  }

  return s;
}