309548bec3
C2X adds a printf %b format (see <http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2630.pdf>, accepted for C2X), for outputting integers in binary. It also has recommended practice for a corresponding %B format (like %b, but %#B starts the output with 0B instead of 0b). Add support for these formats to glibc. One existing test uses %b as an example of an unknown format, to test how glibc printf handles unknown formats; change that to %v. Use of %b and %B as user-registered format specifiers continues to work (and we already have a test that covers that, tst-printfsz.c). Note that C2X also has scanf %b support, plus support for binary constants starting 0b in strtol (base 0 and 2) and scanf %i (strtol base 0 and scanf %i coming from a previous paper that added binary integer literals). I intend to implement those features in a separate patch or patches; as discussed in the thread starting at <https://sourceware.org/pipermail/libc-alpha/2020-December/120414.html>, they will be more complicated because they involve adding extra public symbols to ensure compatibility with existing code that might not expect 0b constants to be handled by strtol base 0 and 2 and scanf %i, whereas simply adding a new format specifier poses no such compatibility concerns. Note that the actual conversion from integer to string uses existing code in _itoa.c. That code has special cases for bases 8, 10 and 16, probably so that the compiler can optimize division by an integer constant in the code for those bases. If desired such special cases could easily be added for base 2 as well, but that would be an optimization, not actually needed for these printf formats to work. Tested for x86_64 and x86. Also tested with build-many-glibcs.py for aarch64-linux-gnu with GCC mainline to make sure that the test does indeed build with GCC 12 (where format checking warnings are enabled for most of the test).
113 lines
4.1 KiB
Makefile
113 lines
4.1 KiB
Makefile
# Copyright (C) 1995-2021 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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# Sub-makefile for wcsmbs portion of the library.
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#
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subdir := wcsmbs
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include ../Makeconfig
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headers := wchar.h bits/wchar.h bits/wchar2.h bits/wchar-ldbl.h uchar.h \
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bits/types/__mbstate_t.h bits/types/mbstate_t.h bits/types/wint_t.h
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routines := wcscat wcschr wcscmp wcscpy wcscspn wcsdup wcslen wcsncat \
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wcsncmp wcsncpy wcspbrk wcsrchr wcsspn wcstok wcsstr wmemchr \
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wmemcmp wmemcpy wmemmove wmemset wcpcpy wcpncpy wmempcpy \
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btowc wctob mbsinit \
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mbrlen mbrtowc wcrtomb mbsrtowcs wcsrtombs \
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mbsnrtowcs wcsnrtombs wcsnlen wcschrnul \
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wcstol wcstoul wcstoll wcstoull wcstod wcstold wcstof \
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wcstol_l wcstoul_l wcstoll_l wcstoull_l \
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wcstod_l wcstold_l wcstof_l \
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wcstod_nan wcstold_nan wcstof_nan \
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wcscoll wcsxfrm \
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wcwidth wcswidth \
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wcscoll_l wcsxfrm_l \
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wcscasecmp wcsncase wcscasecmp_l wcsncase_l \
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wcsmbsload mbsrtowcs_l \
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isoc99_wscanf isoc99_vwscanf isoc99_fwscanf isoc99_vfwscanf \
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isoc99_swscanf isoc99_vswscanf \
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mbrtoc16 c16rtomb mbrtoc32 c32rtomb
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strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen \
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wcpcpy wcsncpy wcpncpy wcscat wcsncat wcschrnul wcsspn wcspbrk \
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wcscspn wmemchr wmemset
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tests := tst-wcstof wcsmbs-tst1 tst-wcsnlen tst-btowc tst-mbrtowc \
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tst-wcrtomb tst-wcpncpy tst-mbsrtowcs tst-wchar-h tst-mbrtowc2 \
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tst-c16c32-1 wcsatcliff tst-wcstol-locale tst-wcstod-nan-locale \
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tst-wcstod-round test-char-types tst-fgetwc-after-eof \
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tst-wcstod-nan-sign tst-c16-surrogate tst-c32-state \
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$(addprefix test-,$(strop-tests)) tst-mbstowcs \
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tst-wprintf-binary
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include ../Rules
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ifeq ($(run-built-tests),yes)
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LOCALES := de_DE.ISO-8859-1 de_DE.UTF-8 en_US.ANSI_X3.4-1968 hr_HR.ISO-8859-2 \
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ja_JP.EUC-JP zh_TW.EUC-TW tr_TR.UTF-8 tr_TR.ISO-8859-9
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include ../gen-locales.mk
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$(objpfx)tst-btowc.out: $(gen-locales)
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$(objpfx)tst-c16c32-1.out: $(gen-locales)
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$(objpfx)tst-mbrtowc.out: $(gen-locales)
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$(objpfx)tst-mbrtowc2.out: $(gen-locales)
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$(objpfx)tst-wcrtomb.out: $(gen-locales)
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$(objpfx)wcsmbs-tst1.out: $(gen-locales)
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$(objpfx)tst-wcstol-locale.out: $(gen-locales)
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$(objpfx)tst-wcstod-nan-locale.out: $(gen-locales)
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$(objpfx)tst-c16-surrogate.out: $(gen-locales)
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$(objpfx)tst-c32-state.out: $(gen-locales)
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endif
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$(objpfx)tst-wcstod-round: $(libm)
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CFLAGS-wcwidth.c += -I../wctype
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CFLAGS-wcswidth.c += -I../wctype
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strtox-CFLAGS = -I../include
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CFLAGS-wcstol.c += $(strtox-CFLAGS)
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CFLAGS-wcstoul.c += $(strtox-CFLAGS)
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CFLAGS-wcstoll.c += $(strtox-CFLAGS)
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CFLAGS-wcstoull.c += $(strtox-CFLAGS)
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CFLAGS-wcstod.c += $(strtox-CFLAGS)
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CFLAGS-wcstold.c += $(strtox-CFLAGS)
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CFLAGS-wcstof128.c += $(strtox-CFLAGS)
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CFLAGS-wcstof.c += $(strtox-CFLAGS)
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CFLAGS-wcstol_l.c += $(strtox-CFLAGS)
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CFLAGS-wcstoul_l.c += $(strtox-CFLAGS)
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CFLAGS-wcstoll_l.c += $(strtox-CFLAGS)
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CFLAGS-wcstoull_l.c += $(strtox-CFLAGS)
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CFLAGS-wcstod_l.c += $(strtox-CFLAGS)
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CFLAGS-wcstold_l.c += $(strtox-CFLAGS)
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CFLAGS-wcstof128_l.c += $(strtox-CFLAGS)
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CFLAGS-wcstof_l.c += $(strtox-CFLAGS)
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CPPFLAGS-tst-wchar-h.c += -D_FORTIFY_SOURCE=2
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CFLAGS-isoc99_wscanf.c += -fexceptions
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CFLAGS-isoc99_fwscanf.c += -fexceptions
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CFLAGS-isoc99_vwscanf.c += -fexceptions
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CFLAGS-isoc99_vfwscanf.c += -fexceptions
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CPPFLAGS += $(libio-mtsafe)
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# We need to find the default version of strtold_l in stdlib.
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CPPFLAGS-wcstold_l.c += -I../stdlib
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$(objpfx)tst-wcstod-nan-locale: $(libm)
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$(objpfx)tst-wcstod-nan-sign: $(libm)
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