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e535fb910c
C23 defines library macros __STDC_VERSION_<header>_H__ to indicate that a header has support for new / changed features from C23. Now that all the required library features are implemented in glibc, define these macros. I'm not sure this is sufficiently much of a user-visible feature to be worth a mention in NEWS. Tested for x86_64. There are various optional C23 features we don't yet have, of which I might look at the Annex H ones (floating-point encoding conversion functions and _Float16 functions) next. * Optional time bases TIME_MONOTONIC, TIME_ACTIVE, TIME_THREAD_ACTIVE. See <https://sourceware.org/pipermail/libc-alpha/2023-June/149264.html> - we need to review / update that patch. (I think patch 2/2, inventing new names for all the nonstandard CLOCK_* supported by the Linux kernel, is rather more dubious.) * Updating conform/ tests for C23. * Defining the rounding mode macro FE_TONEARESTFROMZERO for RISC-V (as far as I know, the only architecture supported by glibc that has hardware support for this rounding mode for binary floating point) and supporting it throughout glibc and its tests (especially the string/numeric conversions in both directions that explicitly handle each possible rounding mode, and various tests that do likewise). * Annex H floating-point encoding conversion functions. (It's not entirely clear which are optional even given support for Annex H; there's some wording applied inconsistently about only being required when non-arithmetic interchange formats are supported; see the comments I raised on the WG14 reflector on 23 Oct 2025.) * _Float16 functions (and other header and testcase support for this type). * Decimal floating-point support. * Fully supporting __int128 and unsigned __int128 as integer types wider than intmax_t, as permitted by C23. Would need doing in coordination with GCC, see GCC bug 113887 for more discussion of what's involved.
315 lines
8.1 KiB
C
315 lines
8.1 KiB
C
/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/*
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* ISO C99: 7.18 Integer types <stdint.h>
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*/
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#ifndef _STDINT_H
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#define _STDINT_H 1
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#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
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#include <bits/libc-header-start.h>
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#include <bits/types.h>
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#include <bits/wchar.h>
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#include <bits/wordsize.h>
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#if __GLIBC_USE (ISOC23)
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# define __STDC_VERSION_STDINT_H__ 202311L
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#endif
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/* Exact integral types. */
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/* Signed. */
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#include <bits/stdint-intn.h>
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/* Unsigned. */
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#include <bits/stdint-uintn.h>
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/* Small types. */
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#include <bits/stdint-least.h>
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/* Fast types. */
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/* Signed. */
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typedef signed char int_fast8_t;
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#if __WORDSIZE == 64
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typedef long int int_fast16_t;
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typedef long int int_fast32_t;
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typedef long int int_fast64_t;
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#else
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typedef int int_fast16_t;
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typedef int int_fast32_t;
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__extension__
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typedef long long int int_fast64_t;
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#endif
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/* Unsigned. */
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typedef unsigned char uint_fast8_t;
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#if __WORDSIZE == 64
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typedef unsigned long int uint_fast16_t;
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typedef unsigned long int uint_fast32_t;
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typedef unsigned long int uint_fast64_t;
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#else
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typedef unsigned int uint_fast16_t;
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typedef unsigned int uint_fast32_t;
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__extension__
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typedef unsigned long long int uint_fast64_t;
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#endif
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/* Types for `void *' pointers. */
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#if __WORDSIZE == 64
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# ifndef __intptr_t_defined
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typedef long int intptr_t;
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# define __intptr_t_defined
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# endif
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typedef unsigned long int uintptr_t;
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#else
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# ifndef __intptr_t_defined
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typedef int intptr_t;
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# define __intptr_t_defined
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# endif
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typedef unsigned int uintptr_t;
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#endif
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/* Largest integral types. */
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typedef __intmax_t intmax_t;
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typedef __uintmax_t uintmax_t;
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# undef __INT64_C
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# undef __UINT64_C
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# if __WORDSIZE == 64
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# define __INT64_C(c) c ## L
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# define __UINT64_C(c) c ## UL
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# else
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# define __INT64_C(c) c ## LL
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# define __UINT64_C(c) c ## ULL
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# endif
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/* Limits of integral types. */
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/* Minimum of signed 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 (-__INT64_C(9223372036854775807)-1)
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/* Maximum of signed integral types. */
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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 (__INT64_C(9223372036854775807))
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/* Maximum of unsigned integral types. */
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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 (__UINT64_C(18446744073709551615))
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/* Minimum of signed integral types having a minimum size. */
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# define INT_LEAST8_MIN (-128)
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# define INT_LEAST16_MIN (-32767-1)
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# define INT_LEAST32_MIN (-2147483647-1)
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# define INT_LEAST64_MIN (-__INT64_C(9223372036854775807)-1)
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/* Maximum of signed integral types having a minimum size. */
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# define INT_LEAST8_MAX (127)
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# define INT_LEAST16_MAX (32767)
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# define INT_LEAST32_MAX (2147483647)
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# define INT_LEAST64_MAX (__INT64_C(9223372036854775807))
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/* Maximum of unsigned integral types having a minimum size. */
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# define UINT_LEAST8_MAX (255)
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# define UINT_LEAST16_MAX (65535)
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# define UINT_LEAST32_MAX (4294967295U)
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# define UINT_LEAST64_MAX (__UINT64_C(18446744073709551615))
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/* Minimum of fast signed integral types having a minimum size. */
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# define INT_FAST8_MIN (-128)
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# if __WORDSIZE == 64
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# define INT_FAST16_MIN (-9223372036854775807L-1)
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# define INT_FAST32_MIN (-9223372036854775807L-1)
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# else
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# define INT_FAST16_MIN (-2147483647-1)
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# define INT_FAST32_MIN (-2147483647-1)
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# endif
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# define INT_FAST64_MIN (-__INT64_C(9223372036854775807)-1)
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/* Maximum of fast signed integral types having a minimum size. */
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# define INT_FAST8_MAX (127)
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# if __WORDSIZE == 64
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# define INT_FAST16_MAX (9223372036854775807L)
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# define INT_FAST32_MAX (9223372036854775807L)
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# else
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# define INT_FAST16_MAX (2147483647)
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# define INT_FAST32_MAX (2147483647)
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# endif
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# define INT_FAST64_MAX (__INT64_C(9223372036854775807))
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/* Maximum of fast unsigned integral types having a minimum size. */
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# define UINT_FAST8_MAX (255)
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# if __WORDSIZE == 64
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# define UINT_FAST16_MAX (18446744073709551615UL)
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# define UINT_FAST32_MAX (18446744073709551615UL)
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# else
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# define UINT_FAST16_MAX (4294967295U)
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# define UINT_FAST32_MAX (4294967295U)
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# endif
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# define UINT_FAST64_MAX (__UINT64_C(18446744073709551615))
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/* Values to test for integral types holding `void *' pointer. */
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# if __WORDSIZE == 64
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# define INTPTR_MIN (-9223372036854775807L-1)
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# define INTPTR_MAX (9223372036854775807L)
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# define UINTPTR_MAX (18446744073709551615UL)
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# else
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# define INTPTR_MIN (-2147483647-1)
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# define INTPTR_MAX (2147483647)
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# define UINTPTR_MAX (4294967295U)
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# endif
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/* Minimum for largest signed integral type. */
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# define INTMAX_MIN (-__INT64_C(9223372036854775807)-1)
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/* Maximum for largest signed integral type. */
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# define INTMAX_MAX (__INT64_C(9223372036854775807))
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/* Maximum for largest unsigned integral type. */
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# define UINTMAX_MAX (__UINT64_C(18446744073709551615))
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/* Limits of other integer types. */
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/* Limits of `ptrdiff_t' type. */
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# if __WORDSIZE == 64
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# define PTRDIFF_MIN (-9223372036854775807L-1)
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# define PTRDIFF_MAX (9223372036854775807L)
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# else
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# if __WORDSIZE32_PTRDIFF_LONG
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# define PTRDIFF_MIN (-2147483647L-1)
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# define PTRDIFF_MAX (2147483647L)
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# else
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# define PTRDIFF_MIN (-2147483647-1)
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# define PTRDIFF_MAX (2147483647)
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# endif
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# endif
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/* Limits of `sig_atomic_t'. */
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# define SIG_ATOMIC_MIN (-2147483647-1)
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# define SIG_ATOMIC_MAX (2147483647)
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/* Limit of `size_t' type. */
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# if __WORDSIZE == 64
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# define SIZE_MAX (18446744073709551615UL)
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# else
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# if __WORDSIZE32_SIZE_ULONG
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# define SIZE_MAX (4294967295UL)
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# else
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# define SIZE_MAX (4294967295U)
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# endif
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# endif
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/* Limits of `wchar_t'. */
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# ifndef WCHAR_MIN
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/* These constants might also be defined in <wchar.h>. */
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# define WCHAR_MIN __WCHAR_MIN
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# define WCHAR_MAX __WCHAR_MAX
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# endif
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/* Limits of `wint_t'. */
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# define WINT_MIN (0u)
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# define WINT_MAX (4294967295u)
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/* Signed. */
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# define INT8_C(c) c
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# define INT16_C(c) c
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# define INT32_C(c) c
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# if __WORDSIZE == 64
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# define INT64_C(c) c ## L
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# else
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# define INT64_C(c) c ## LL
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# endif
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/* Unsigned. */
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# define UINT8_C(c) c
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# define UINT16_C(c) c
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# define UINT32_C(c) c ## U
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# if __WORDSIZE == 64
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# define UINT64_C(c) c ## UL
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# else
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# define UINT64_C(c) c ## ULL
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# endif
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/* Maximal type. */
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# if __WORDSIZE == 64
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# define INTMAX_C(c) c ## L
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# define UINTMAX_C(c) c ## UL
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# else
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# define INTMAX_C(c) c ## LL
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# define UINTMAX_C(c) c ## ULL
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# endif
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#if __GLIBC_USE (IEC_60559_BFP_EXT_C23)
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# define INT8_WIDTH 8
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# define UINT8_WIDTH 8
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# define INT16_WIDTH 16
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# define UINT16_WIDTH 16
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# define INT32_WIDTH 32
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# define UINT32_WIDTH 32
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# define INT64_WIDTH 64
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# define UINT64_WIDTH 64
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# define INT_LEAST8_WIDTH 8
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# define UINT_LEAST8_WIDTH 8
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# define INT_LEAST16_WIDTH 16
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# define UINT_LEAST16_WIDTH 16
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# define INT_LEAST32_WIDTH 32
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# define UINT_LEAST32_WIDTH 32
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# define INT_LEAST64_WIDTH 64
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# define UINT_LEAST64_WIDTH 64
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# define INT_FAST8_WIDTH 8
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# define UINT_FAST8_WIDTH 8
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# define INT_FAST16_WIDTH __WORDSIZE
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# define UINT_FAST16_WIDTH __WORDSIZE
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# define INT_FAST32_WIDTH __WORDSIZE
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# define UINT_FAST32_WIDTH __WORDSIZE
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# define INT_FAST64_WIDTH 64
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# define UINT_FAST64_WIDTH 64
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# define INTPTR_WIDTH __WORDSIZE
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# define UINTPTR_WIDTH __WORDSIZE
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# define INTMAX_WIDTH 64
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# define UINTMAX_WIDTH 64
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# define PTRDIFF_WIDTH __WORDSIZE
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# define SIG_ATOMIC_WIDTH 32
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# define SIZE_WIDTH __WORDSIZE
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# define WCHAR_WIDTH 32
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# define WINT_WIDTH 32
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#endif
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#endif /* stdint.h */
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