lib/type-props.h

   1 /*
   2  * Copyright (c) 2008 Nicira Networks.
   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 TYPE_PROPS_H
  18 #define TYPE_PROPS_H 1
  19
  20 #include <limits.h>
  21
  22 #define TYPE_IS_INTEGER(TYPE) ((TYPE) 1.5 == (TYPE) 1)
  23 #define TYPE_IS_SIGNED(TYPE) ((TYPE) 0 > (TYPE) -1)
  24 #define TYPE_VALUE_BITS(TYPE) (sizeof(TYPE) * CHAR_BIT - TYPE_IS_SIGNED(TYPE))
  25 #define TYPE_MINIMUM(TYPE) (TYPE_IS_SIGNED(TYPE) \
  26                             ? ~(TYPE)0 << TYPE_VALUE_BITS(TYPE) \
  27                             : 0)
  28 #define TYPE_MAXIMUM(TYPE) (TYPE_IS_SIGNED(TYPE) \
  29                             ? ~(~(TYPE)0 << TYPE_VALUE_BITS(TYPE)) \
  30                             : (TYPE)-1)
  31
  32 #endif /* type-props.h */