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3e9fd4e9a1
This commit adds some of the missing integer types to stdint.h and adds
limit macros (e.g. INTN_{MIN,MAX}).
The reference used for adding these types is
https://pubs.opengroup.org/onlinepubs/009695399/basedefs/stdint.h.html.
We rely on the compiler-defined __LONG_MAX__ to get the right limits for
size_t, intptr_t, uintptr_t and ptrdiff_t. This compiler constant seem
to have been defined at least since GCC 4.1.2 and clang
3.0.0 on x86_64. It is also defined on ARM (32&64), mips and RISC-V.
Note that the maximum size of size_t is implementation-defined (>65535),
in this case I chose to go with unsigned long on all platforms since
unsigned long == unsigned int on all the platforms we care about. Note
that the kernel uses either unsigned int or unsigned long in
linux/include/uapi/asm-generic/posix_types.h. These should be equivalent
for the plaforms we are targeting.
Also note that the 'fast*' flavor of the types have been chosen to be
always 1 byte for '*fast8*' and always long (a.k.a. intptr_t/uintptr_t) for
the other variants. I have never seen the 'fast*' types in use in the wild
but that seems to be what glibc does.
Signed-off-by: Vincent Dagonneau <v@vda.io>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* Standard definitions and types for NOLIBC
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* Copyright (C) 2023 Vincent Dagonneau <v@vda.io>
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*/
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#ifndef _NOLIBC_STDINT_H
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#define _NOLIBC_STDINT_H
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typedef unsigned char uint8_t;
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typedef signed char int8_t;
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typedef unsigned short uint16_t;
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typedef signed short int16_t;
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typedef unsigned int uint32_t;
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typedef signed int int32_t;
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typedef unsigned long long uint64_t;
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typedef signed long long int64_t;
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typedef unsigned long size_t;
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typedef signed long ssize_t;
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typedef unsigned long uintptr_t;
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typedef signed long intptr_t;
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typedef signed long ptrdiff_t;
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typedef int8_t int_least8_t;
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typedef uint8_t uint_least8_t;
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typedef int16_t int_least16_t;
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typedef uint16_t uint_least16_t;
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typedef int32_t int_least32_t;
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typedef uint32_t uint_least32_t;
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typedef int64_t int_least64_t;
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typedef uint64_t uint_least64_t;
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typedef int8_t int_fast8_t;
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typedef uint8_t uint_fast8_t;
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typedef ssize_t int_fast16_t;
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typedef size_t uint_fast16_t;
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typedef ssize_t int_fast32_t;
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typedef size_t uint_fast32_t;
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typedef ssize_t int_fast64_t;
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typedef size_t uint_fast64_t;
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typedef int64_t intmax_t;
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typedef uint64_t uintmax_t;
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/* limits of integral types */
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#define INT8_MIN (-128)
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#define INT16_MIN (-32767-1)
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#define INT32_MIN (-2147483647-1)
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#define INT64_MIN (-9223372036854775807LL-1)
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#define INT8_MAX (127)
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#define INT16_MAX (32767)
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#define INT32_MAX (2147483647)
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#define INT64_MAX (9223372036854775807LL)
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#define UINT8_MAX (255)
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#define UINT16_MAX (65535)
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#define UINT32_MAX (4294967295U)
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#define UINT64_MAX (18446744073709551615ULL)
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#define INT_LEAST8_MIN INT8_MIN
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#define INT_LEAST16_MIN INT16_MIN
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#define INT_LEAST32_MIN INT32_MIN
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#define INT_LEAST64_MIN INT64_MIN
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#define INT_LEAST8_MAX INT8_MAX
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#define INT_LEAST16_MAX INT16_MAX
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#define INT_LEAST32_MAX INT32_MAX
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#define INT_LEAST64_MAX INT64_MAX
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#define UINT_LEAST8_MAX UINT8_MAX
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#define UINT_LEAST16_MAX UINT16_MAX
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#define UINT_LEAST32_MAX UINT32_MAX
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#define UINT_LEAST64_MAX UINT64_MAX
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#define SIZE_MAX ((size_t)(__LONG_MAX__) * 2 + 1)
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#define INTPTR_MIN (-__LONG_MAX__ - 1)
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#define INTPTR_MAX __LONG_MAX__
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#define PTRDIFF_MIN INTPTR_MIN
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#define PTRDIFF_MAX INTPTR_MAX
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#define UINTPTR_MAX SIZE_MAX
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#define INT_FAST8_MIN INT8_MIN
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#define INT_FAST16_MIN INTPTR_MIN
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#define INT_FAST32_MIN INTPTR_MIN
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#define INT_FAST64_MIN INTPTR_MIN
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#define INT_FAST8_MAX INT8_MAX
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#define INT_FAST16_MAX INTPTR_MAX
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#define INT_FAST32_MAX INTPTR_MAX
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#define INT_FAST64_MAX INTPTR_MAX
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#define UINT_FAST8_MAX UINT8_MAX
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#define UINT_FAST16_MAX SIZE_MAX
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#define UINT_FAST32_MAX SIZE_MAX
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#define UINT_FAST64_MAX SIZE_MAX
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#endif /* _NOLIBC_STDINT_H */
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