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c002791a30
Currently, MSVC complains when you have a macro of the form TYPE_MAXIMUM(uint64_t) because a part of macro becomes ~(uint64_t)0 << 64 with a warning: C4293: '<<' : shift count negative or too big, undefined behavior. This commit makes changes to the macro to prevent that warning. Suggested-by: Ben Pfaff <blp@nicira.com> Signed-off-by: Gurucharan Shetty <gshetty@nicira.com> Acked-by: Ben Pfaff <blp@nicira.com>
40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
/*
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* Copyright (c) 2008, 2011 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TYPE_PROPS_H
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#define TYPE_PROPS_H 1
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#include <limits.h>
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#define TYPE_IS_INTEGER(TYPE) ((TYPE) 1.5 == (TYPE) 1)
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#define TYPE_IS_SIGNED(TYPE) ((TYPE) 1 > (TYPE) -1)
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#define TYPE_VALUE_BITS(TYPE) (sizeof(TYPE) * CHAR_BIT - TYPE_IS_SIGNED(TYPE))
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#define TYPE_MINIMUM(TYPE) (TYPE_IS_SIGNED(TYPE) \
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? ~(TYPE)0 << (sizeof(TYPE) * 8 - 1) \
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: 0)
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#define TYPE_MAXIMUM(TYPE) (TYPE_IS_SIGNED(TYPE) \
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? ~(~(TYPE)0 << (sizeof(TYPE) * 8 - 1)) \
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: (TYPE)-1)
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/* Number of decimal digits required to format an integer of the given TYPE.
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* Includes space for a sign, if TYPE is signed, but not for a null
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* terminator.
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*
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* The value is an overestimate. */
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#define INT_STRLEN(TYPE) (TYPE_IS_SIGNED(TYPE) + TYPE_VALUE_BITS(TYPE) / 3 + 1)
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#endif /* type-props.h */
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