forked from Telodendria/Telodendria
Jordan Bancino
9292f1d9da
Note that since all the headers are not documented yet, this will fail because an undocumented function is a fatal error in hdoc.
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/*
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* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef TELODENDRIA_INT_H
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#define TELODENDRIA_INT_H
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/***
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* @Nm Int
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* @Nd Fixed-width integer types.
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* @Dd April 27 2023
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*
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* This header provides cross-platform, fixed-width integer types.
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* Specifically, it uses preprocessor magic to define the following
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* types:
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* .Bl -bullet -offset indent
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* .It
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* Int8 and UInt8
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* .It
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* Int16 and UInt16
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* .It
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* Int32 and UInt32
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* .El
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* .Pp
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* Note that there is no 64-bit integer type, because the ANSI C
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* standard makes no guarantee that such a type will exist, even
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* though it does on most platforms.
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* .Pp
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* The reason Telodendria provides its own header for this is
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* because ANSI C does not define fixed-width types, and while it
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* should be safe to rely on C99 fixed-width types in most cases,
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* there may be cases where even that is not possible.
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*
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* @ignore-typedefs
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*/
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#include <limits.h>
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#define BIT64_MAX 18446744073709551615
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#define BIT32_MAX 4294967295
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#define BIT16_MAX 65535
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#define BIT8_MAX 255
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#ifndef UCHAR_MAX
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#error Size of char data type is unknown. Define UCHAR_MAX.
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#endif
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#ifndef USHRT_MAX
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#error Size of short data type is unknown. Define USHRT_MAX.
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#endif
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#ifndef UINT_MAX
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#error Size of int data type is unknown. Define UINT_MAX.
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#endif
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#ifndef ULONG_MAX
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#error Size of long data type is unknown. Define ULONG_MAX.
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#endif
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#if UCHAR_MAX == BIT8_MAX
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typedef signed char Int8;
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typedef unsigned char UInt8;
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#else
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#error Unable to determine suitable data type for 8-bit integers.
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#endif
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#if UINT_MAX == BIT16_MAX
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typedef signed int Int16;
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typedef unsigned int UInt16;
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#elif USHRT_MAX == BIT16_MAX
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typedef signed short Int16;
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typedef unsigned short UInt16;
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#elif UCHAR_MAX == BIT16_MAX
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typedef signed char Int16;
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typedef unsigned char UInt16;
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#else
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#error Unable to determine suitable data type for 16-bit integers.
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#endif
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#if ULONG_MAX == BIT32_MAX
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typedef signed long Int32;
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typedef unsigned long UInt32;
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#elif UINT_MAX == BIT32_MAX
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typedef signed int Int32;
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typedef unsigned int UInt32;
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#elif USHRT_MAX == BIT32_MAX
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typedef signed short Int32;
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typedef unsigned short UInt32;
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#elif UCHAR_MAX == BIT32_MAX
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typedef signed char Int32;
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typedef unsigned char UInt32;
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#else
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#error Unable to determine suitable data type for 32-bit integers.
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#endif
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/* The ANSI C standard only guarantees a data size of up to 32 bits. */
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#endif
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