refimpl/bvb_sysdeps_stub.c

/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <endian.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "bvb_sysdeps.h"

int bvb_memcmp(const void* src1, const void* src2, size_t n) {
  return memcmp(src1, src2, n);
}

void* bvb_memcpy(void* dest, const void* src, size_t n) {
  return memcpy(dest, src, (size_t)n);
}

void* bvb_memset(void* dest, const int c, size_t n) {
  return memset(dest, c, n);
}

size_t bvb_strlen(const char* str) {
  return strlen(str);
}

int bvb_safe_memcmp(const void* s1, const void* s2, size_t n) {
  const unsigned char* us1 = s1;
  const unsigned char* us2 = s2;
  int result = 0;

  if (0 == n)
    return 0;

  /*
   * Code snippet without data-dependent branch due to Nate Lawson
   * (nate@root.org) of Root Labs.
   */
  while (n--)
    result |= *us1++ ^ *us2++;

  return result != 0;
}

void bvb_error(const char* format, ...) {
  va_list ap;
  va_start(ap, format);
  fprintf(stderr, "ERROR: ");
  vfprintf(stderr, format, ap);
  va_end(ap);
  exit(1);
}

#ifdef BVB_ENABLE_DEBUG
void bvb_debug(const char* format, ...) {
  va_list ap;
  va_start(ap, format);
  fprintf(stderr, "DEBUG: ");
  vfprintf(stderr, format, ap);
  va_end(ap);
}
#endif

void* bvb_malloc(size_t size) {
  return malloc(size);
}

void bvb_free(void* ptr) {
  free(ptr);
}