94 lines
4.0 KiB
C
94 lines
4.0 KiB
C
//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Integer types limits and utilities //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#ifndef _KALBASE_LIMITS_H
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#define _KALBASE_LIMITS_H
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//------------------------------------------//
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#define BYTE unsigned char
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#define WORD unsigned short
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#define DWORD unsigned int
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#define QWORD unsigned long
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#define CHAR_BIT 8
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#define BITS_IN(T) (sizeof(T) * CHAR_BIT)
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/* XXX find a generic way */
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#define BYTES_TO_WORDS(B) ((B) >> 1)
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#define BYTES_TO_DWORDS(B) ((B) >> 2)
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#define BYTES_TO_QWORDS(B) ((B) >> 3)
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#define WORDS_TO_BYTES(W) ((W) << 1)
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#define WORDS_TO_DWORDS(W) ((W) >> 1)
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#define WORDS_TO_QWORDS(W) ((W) >> 2)
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#define DWORDS_TO_BYTES(D) ((D) << 2)
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#define DWORDS_TO_WORDS(D) ((D) << 1)
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#define DWORDS_TO_QWORDS(D) ((D) >> 1)
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#define QWORDS_TO_BYTES(Q) ((Q) << 3)
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#define QWORDS_TO_WORDS(Q) ((Q) << 2)
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#define QWORDS_TO_DWORDS(Q) ((Q) << 1)
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//------------------------------------------//
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/* U/L suffixes on hex numbers look odd */
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#define SCHAR_MAX ((signed char) 0x7F)
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#define SHRT_MAX ((short) 0x7FFF)
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#define INT_MAX ((int) 0x7FFFFFFF)
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#define LONG_MAX ((long) 0x7FFFFFFFFFFFFFFFL)
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#define UCHAR_MAX ((unsigned char) 0xFFU)
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#define USHRT_MAX ((unsigned short) 0xFFFFU)
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#define UINT_MAX ((unsigned int) 0xFFFFFFFFU)
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#define ULONG_MAX ((unsigned long) 0xFFFFFFFFFFFFFFFFUL)
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#define SCHAR_MIN ((signed char) -SCHAR_MAX - 1)
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#define SHRT_MIN ((short) -SHRT_MAX - 1)
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#define INT_MIN ((int) -INT_MAX - 1)
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#define LONG_MIN ((long) -LONG_MAX - 1L)
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#ifdef __CHAR_UNSIGNED__
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# define CHAR_MIN ((char)0)
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# define CHAR_MAX ((char)UCHAR_MAX)
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#else
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# define CHAR_MIN ((char)SCHAR_MIN)
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# define CHAR_MAX ((char)SCHAR_MAX)
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#endif
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#define SSIZE_T_MIN LONG_MIN
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#define SSIZE_T_MAX LONG_MAX
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#define SIZE_T_MAX ULONG_MAX
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#ifdef NEED_MORE_USELESS_DATA
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# define UCHAR_MIN ((unsigned char)0)
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# define USHRT_MIN ((unsigned short)0)
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# define UINT_MIN ((unsigned int)0)
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# define ULONG_MIN ((unsigned long)0)
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# ifdef STILL_NEED_MORE_USELESS_DATA
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# error "Not enough useless data!"
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# endif
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#endif
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//------------------------------------------//
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#endif
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