lib/random.h

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2012 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef RANDOM_H
  18 #define RANDOM_H 1
  19
  20 #include <stddef.h>
  21 #include <stdint.h>
  22
  23 void random_init(void);
  24 void random_set_seed(uint32_t);
  25
  26 void random_bytes(void *, size_t);
  27 uint32_t random_uint32(void);
  28 uint64_t random_uint64(void);
  29
  30 static inline int
  31 random_range(int max)
  32 {
  33     return random_uint32() % max;
  34 }
  35
  36 static inline uint8_t
  37 random_uint8(void)
  38 {
  39     return random_uint32();
  40 }
  41
  42 static inline uint16_t
  43 random_uint16(void)
  44 {
  45     return random_uint32();
  46 }
  47
  48 #endif /* random.h */