From 15081be9938d0b84634e81b7f0e433ff62406430 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Wed, 7 Feb 2018 20:33:55 +0000 Subject: Define char16_t, char32_t consistently with uint_least16_t, uint_least32_t (bug 17979). As noted in bug 17979 (and as I noted earlier in ), uchar.h has gratuitously complicated code to determine the types for char16_t and char32_t, and to reject including that header for pre-C11 compilers not defining __CHAR16_TYPE__ and __CHAR32_TYPE__. Since those types are always required to match uint_least16_t and uint_least32_t, which glibc knows how to define without reference to such predefined macros, it's safe just to define those types the same as the *least* types are defined in stdint.h, so allowing the header to work with (for example) GCC 4.3. This patch implements that. bits/types.h is made to define __int_leastN_t and __uint_leastN_t so the logic for those types can stay in a single place, and stdint.h is made to use those __*_t to define the public *_t types. uchar.h is then made to use __uint_least16_t and __uint_least32_t to define char16_t and char32_t, so simplifying the logic there. A new test is added that verifies the types chosen for char16_t and char32_t do indeed match the types the compiler uses for u"" and U"" string literals. Tested for x86_64. (I have not tested with any of the older compilers for which this would actually make a difference to whether you can include uchar.h.) [BZ #17979] * posix/bits/types.h (__int_least8_t): New typedef. (__uint_least8_t): Likewise. (__int_least16_t): Likewise. (__uint_least16_t): Likewise. (__int_least32_t): Likewise. (__uint_least32_t): Likewise. (__int_least64_t): Likewise. (__uint_least64_t): Likewise. * sysdeps/generic/stdint.h (int_least8_t): Define using __int_least8_t. (int_least16_t): Define using __int_least16_t. (int_least32_t): Define using __int_least32_t. (int_least64_t): Define using __int_least64_t. (uint_least8_t): Define using __uint_least8_t. (uint_least16_t): Define using __uint_least16_t. (uint_least32_t): Define using __uint_least32_t. (uint_least64_t): Define using __uint_least64_t. * wcsmbs/uchar.h: Include . (char16_t): Define using __uint_least16_t conditional only on [!__USE_ISOCXX11]. (char32_t): Define using __uint_least32_t conditional only on [!__USE_ISOCXX11]. * wcsmbs/test-char-types.c: New file. * wcsmbs/Makefile (tests): Add test-char-types. --- wcsmbs/Makefile | 2 +- wcsmbs/test-char-types.c | 31 +++++++++++++++++++++++++++++++ wcsmbs/uchar.h | 17 +++++------------ 3 files changed, 37 insertions(+), 13 deletions(-) create mode 100644 wcsmbs/test-char-types.c (limited to 'wcsmbs') diff --git a/wcsmbs/Makefile b/wcsmbs/Makefile index 653e289663..3ee91d2e1a 100644 --- a/wcsmbs/Makefile +++ b/wcsmbs/Makefile @@ -50,7 +50,7 @@ strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen \ tests := tst-wcstof wcsmbs-tst1 tst-wcsnlen tst-btowc tst-mbrtowc \ tst-wcrtomb tst-wcpncpy tst-mbsrtowcs tst-wchar-h tst-mbrtowc2 \ tst-c16c32-1 wcsatcliff tst-wcstol-locale tst-wcstod-nan-locale \ - tst-wcstod-round \ + tst-wcstod-round test-char-types \ $(addprefix test-,$(strop-tests)) include ../Rules diff --git a/wcsmbs/test-char-types.c b/wcsmbs/test-char-types.c new file mode 100644 index 0000000000..31237619d2 --- /dev/null +++ b/wcsmbs/test-char-types.c @@ -0,0 +1,31 @@ +/* Test char16_t and char32_t types consistent with compiler. + Copyright (C) 2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include + +const char16_t *s16 = u""; +const char32_t *s32 = U""; + +static int +do_test (void) +{ + /* This is a compilation test. */ + return 0; +} + +#include diff --git a/wcsmbs/uchar.h b/wcsmbs/uchar.h index 4d78f70fa2..4d9b2ec14d 100644 --- a/wcsmbs/uchar.h +++ b/wcsmbs/uchar.h @@ -28,20 +28,13 @@ #define __need_size_t #include +#include #include -#if defined __GNUC__ && !defined __USE_ISOCXX11 -/* Define the 16-bit and 32-bit character types. Use the information - provided by the compiler. */ -# if !defined __CHAR16_TYPE__ || !defined __CHAR32_TYPE__ -# if defined __STDC_VERSION__ && __STDC_VERSION__ < 201000L -# error " requires ISO C11 mode" -# else -# error "definitions of __CHAR16_TYPE__ and/or __CHAR32_TYPE__ missing" -# endif -# endif -typedef __CHAR16_TYPE__ char16_t; -typedef __CHAR32_TYPE__ char32_t; +#ifndef __USE_ISOCXX11 +/* Define the 16-bit and 32-bit character types. */ +typedef __uint_least16_t char16_t; +typedef __uint_least32_t char32_t; #endif -- cgit v1.2.3-65-gdbad