Mercurial > gnulib
view lib/count-one-bits.h @ 40172:31ab89a208b9
strtod, strtold: Use the locale's decimal point.
* lib/strtod.c: Include <locale.h>, <stdio.h>, <langinfo.h>.
(decimal_point_char): New function, copied from lib/vasnprintf.c.
(parse_number): Add a radixchar argument. Use it instead of '.'.
(STRTOD): Invoke decimal_point_char and pass the result to parse_number.
* m4/strtod.m4 (gl_PREREQ_STRTOD): Test whether nl_langinfo exists.
* m4/strtold.m4 (gl_PREREQ_STRTOLD): Likewise.
* tests/test-strtod1.c: New file.
* tests/test-strtod1.sh: New file.
* modules/strtod-tests (Files): Add test-strtod1.{sh,c}. Add
locale-fr.m4 and its dependencies.
(configure.ac): Invoke gt_LOCALE_FR, gt_LOCALE_FR_UTF8.
(Makefile.am): Arrange to compile test-strtod1.c and run
test-strtod1.sh.
* tests/test-strtold1.c: New file.
* tests/test-strtold1.sh: New file.
* modules/strtold-tests (Files): Add test-strtold1.{sh,c}. Add
locale-fr.m4 and its dependencies.
(configure.ac): Invoke gt_LOCALE_FR, gt_LOCALE_FR_UTF8.
(Makefile.am): Arrange to compile test-strtold1.c and run
test-strtold1.sh.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Fri, 01 Feb 2019 03:12:28 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
/* count-one-bits.h -- counts the number of 1-bits in a word. Copyright (C) 2007-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* Written by Ben Pfaff. */ #ifndef COUNT_ONE_BITS_H #define COUNT_ONE_BITS_H 1 #include <limits.h> #include <stdlib.h> #ifndef _GL_INLINE_HEADER_BEGIN #error "Please include config.h first." #endif _GL_INLINE_HEADER_BEGIN #ifndef COUNT_ONE_BITS_INLINE # define COUNT_ONE_BITS_INLINE _GL_INLINE #endif /* Expand to code that computes the number of 1-bits of the local variable 'x' of type TYPE (an unsigned integer type) and return it from the current function. */ #define COUNT_ONE_BITS_GENERIC(TYPE) \ do \ { \ int count = 0; \ int bits; \ for (bits = 0; bits < sizeof (TYPE) * CHAR_BIT; bits += 32) \ { \ count += count_one_bits_32 (x); \ x = x >> 31 >> 1; \ } \ return count; \ } \ while (0) /* Assuming the GCC builtin is BUILTIN and the MSC builtin is MSC_BUILTIN, expand to code that computes the number of 1-bits of the local variable 'x' of type TYPE (an unsigned integer type) and return it from the current function. */ #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) # define COUNT_ONE_BITS(BUILTIN, MSC_BUILTIN, TYPE) return BUILTIN (x) #else /* Compute and return the number of 1-bits set in the least significant 32 bits of X. */ COUNT_ONE_BITS_INLINE int count_one_bits_32 (unsigned int x) { x = ((x & 0xaaaaaaaaU) >> 1) + (x & 0x55555555U); x = ((x & 0xccccccccU) >> 2) + (x & 0x33333333U); x = (x >> 16) + (x & 0xffff); x = ((x & 0xf0f0) >> 4) + (x & 0x0f0f); return (x >> 8) + (x & 0x00ff); } # if 1500 <= _MSC_VER && (defined _M_IX86 || defined _M_X64) /* While gcc falls back to its own generic code if the machine on which it's running doesn't support popcount, with Microsoft's compiler we need to detect and fallback ourselves. */ # pragma intrinsic __cpuid # pragma intrinsic __popcnt # pragma intrinsic __popcnt64 /* Return nonzero if popcount is supported. */ /* 1 if supported, 0 if not supported, -1 if unknown. */ extern int popcount_support; COUNT_ONE_BITS_INLINE int popcount_supported (void) { if (popcount_support < 0) { int cpu_info[4]; __cpuid (cpu_info, 1); popcount_support = (cpu_info[2] >> 23) & 1; /* See MSDN. */ } return popcount_support; } # define COUNT_ONE_BITS(BUILTIN, MSC_BUILTIN, TYPE) \ do \ { \ if (popcount_supported ()) \ return MSC_BUILTIN (x); \ else \ COUNT_ONE_BITS_GENERIC (TYPE); \ } \ while (0) # else # define COUNT_ONE_BITS(BUILTIN, MSC_BUILTIN, TYPE) \ COUNT_ONE_BITS_GENERIC (TYPE) # endif #endif /* Compute and return the number of 1-bits set in X. */ COUNT_ONE_BITS_INLINE int count_one_bits (unsigned int x) { COUNT_ONE_BITS (__builtin_popcount, __popcnt, unsigned int); } /* Compute and return the number of 1-bits set in X. */ COUNT_ONE_BITS_INLINE int count_one_bits_l (unsigned long int x) { COUNT_ONE_BITS (__builtin_popcountl, __popcnt, unsigned long int); } #if HAVE_UNSIGNED_LONG_LONG_INT /* Compute and return the number of 1-bits set in X. */ COUNT_ONE_BITS_INLINE int count_one_bits_ll (unsigned long long int x) { COUNT_ONE_BITS (__builtin_popcountll, __popcnt64, unsigned long long int); } #endif _GL_INLINE_HEADER_END #endif /* COUNT_ONE_BITS_H */