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glibc/stdio-common/tst-printf-binary-main.c
Joseph Myers 2d4728e606 Update printf %b/%B C2x support 
WG14 recently accepted two additions to the printf/scanf %b/%B
support: there are now PRIb* and SCNb* macros in <inttypes.h>, and
printf %B is now an optional feature defined in normative text,
instead of recommended practice, with corresponding PRIB* macros that
can also be used to test whether that optional feature is supported.
See N3072 items 14 and 15 for details (those changes were accepted,
some other changes in that paper weren't).

Add the corresponding PRI* macros to glibc and update one place in the
manual referring to %B as recommended.  (SCNb* should naturally be
added at the same time as the corresponding scanf %b support.)

Tested for x86_64 and x86.
2023-03-14 16:58:35 +00:00

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/* Test binary printf formats.
Copyright (C) 2021-2023 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
<https://www.gnu.org/licenses/>. */
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include <libc-diag.h>
#include <support/check.h>
/* GCC does not know the %b or %B formats before GCC 12. */
DIAG_PUSH_NEEDS_COMMENT;
#if !__GNUC_PREREQ (12, 0)
DIAG_IGNORE_NEEDS_COMMENT (11, "-Wformat");
DIAG_IGNORE_NEEDS_COMMENT (11, "-Wformat-extra-args");
#endif
#define CHECK_PRINTF(EXPECTED, FMT, ...) \
do \
{ \
int ret = SNPRINTF (buf, sizeof buf / sizeof buf[0], L_(FMT), \
__VA_ARGS__); \
TEST_COMPARE_STRING_MACRO (buf, L_(EXPECTED)); \
TEST_COMPARE (ret, STRLEN (L_(EXPECTED))); \
} \
while (0)
static int
do_test (void)
{
CHAR buf[1024];
CHECK_PRINTF ("0", "%b", 0u);
CHECK_PRINTF ("0", "%B", 0u);
CHECK_PRINTF ("0", "%#b", 0u);
CHECK_PRINTF ("0", "%#B", 0u);
CHECK_PRINTF ("1", "%b", 1u);
CHECK_PRINTF ("1", "%B", 1u);
CHECK_PRINTF ("10", "%b", 2u);
CHECK_PRINTF ("10", "%B", 2u);
CHECK_PRINTF ("11", "%b", 3u);
CHECK_PRINTF ("11", "%B", 3u);
CHECK_PRINTF ("10000111011001010100001100100001", "%b", 0x87654321);
CHECK_PRINTF ("10000111011001010100001100100001", "%B", 0x87654321);
CHECK_PRINTF ("100001100100001", "%hb", (int) 0x87654321);
CHECK_PRINTF ("100001100100001", "%hB", (int) 0x87654321);
CHECK_PRINTF ("100001", "%hhb", (int) 0x87654321);
CHECK_PRINTF ("100001", "%hhB", (int) 0x87654321);
CHECK_PRINTF ("10000111011001010100001100100001", "%lb", 0x87654321ul);
CHECK_PRINTF ("10000111011001010100001100100001", "%lB", 0x87654321ul);
CHECK_PRINTF ("11111110110111001011101010011001"
"10000111011001010100001100100001", "%llb",
0xfedcba9987654321ull);
CHECK_PRINTF ("11111110110111001011101010011001"
"10000111011001010100001100100001", "%llB",
0xfedcba9987654321ull);
#if LONG_WIDTH >= 64
CHECK_PRINTF ("11111110110111001011101010011001"
"10000111011001010100001100100001", "%lb",
0xfedcba9987654321ul);
CHECK_PRINTF ("11111110110111001011101010011001"
"10000111011001010100001100100001", "%lB",
0xfedcba9987654321ul);
#endif
CHECK_PRINTF ("0b11", "%#" PRIb8, (uint8_t) 3);
CHECK_PRINTF ("0b11", "%#" PRIb16, (uint16_t) 3);
CHECK_PRINTF ("0b10000111011001010100001100100001", "%#" PRIb32,
(uint32_t) 0x87654321);
CHECK_PRINTF ("0b11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIb64,
(uint64_t) 0xfedcba9987654321ull);
CHECK_PRINTF ("0b11", "%#" PRIbLEAST8, (uint_least8_t) 3);
CHECK_PRINTF ("0b11", "%#" PRIbLEAST16, (uint_least16_t) 3);
CHECK_PRINTF ("0b10000111011001010100001100100001", "%#" PRIbLEAST32,
(uint_least32_t) 0x87654321);
CHECK_PRINTF ("0b11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIbLEAST64,
(uint_least64_t) 0xfedcba9987654321ull);
CHECK_PRINTF ("0b11", "%#" PRIbFAST8, (uint_fast8_t) 3);
CHECK_PRINTF ("0b11", "%#" PRIbFAST16, (uint_fast16_t) 3);
CHECK_PRINTF ("0b10000111011001010100001100100001", "%#" PRIbFAST32,
(uint_fast32_t) 0x87654321);
CHECK_PRINTF ("0b11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIbFAST64,
(uint_fast64_t) 0xfedcba9987654321ull);
CHECK_PRINTF ("0b10000111011001010100001100100001", "%#" PRIbPTR,
(uintptr_t) 0x87654321);
CHECK_PRINTF ("0b11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIbMAX,
(uintmax_t) 0xfedcba9987654321ull);
CHECK_PRINTF ("0B11", "%#" PRIB8, (uint8_t) 3);
CHECK_PRINTF ("0B11", "%#" PRIB16, (uint16_t) 3);
CHECK_PRINTF ("0B10000111011001010100001100100001", "%#" PRIB32,
(uint32_t) 0x87654321);
CHECK_PRINTF ("0B11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIB64,
(uint64_t) 0xfedcba9987654321ull);
CHECK_PRINTF ("0B11", "%#" PRIBLEAST8, (uint_least8_t) 3);
CHECK_PRINTF ("0B11", "%#" PRIBLEAST16, (uint_least16_t) 3);
CHECK_PRINTF ("0B10000111011001010100001100100001", "%#" PRIBLEAST32,
(uint_least32_t) 0x87654321);
CHECK_PRINTF ("0B11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIBLEAST64,
(uint_least64_t) 0xfedcba9987654321ull);
CHECK_PRINTF ("0B11", "%#" PRIBFAST8, (uint_fast8_t) 3);
CHECK_PRINTF ("0B11", "%#" PRIBFAST16, (uint_fast16_t) 3);
CHECK_PRINTF ("0B10000111011001010100001100100001", "%#" PRIBFAST32,
(uint_fast32_t) 0x87654321);
CHECK_PRINTF ("0B11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIBFAST64,
(uint_fast64_t) 0xfedcba9987654321ull);
CHECK_PRINTF ("0B10000111011001010100001100100001", "%#" PRIBPTR,
(uintptr_t) 0x87654321);
CHECK_PRINTF ("0B11111110110111001011101010011001"
"10000111011001010100001100100001", "%#" PRIBMAX,
(uintmax_t) 0xfedcba9987654321ull);
CHECK_PRINTF (" 1010", "%5b", 10u);
CHECK_PRINTF (" 1010", "%5B", 10u);
CHECK_PRINTF ("01010", "%05b", 10u);
CHECK_PRINTF ("01010", "%05B", 10u);
CHECK_PRINTF ("1011 ", "%-5b", 11u);
CHECK_PRINTF ("1011 ", "%-5B", 11u);
CHECK_PRINTF ("0b10011", "%#b", 19u);
CHECK_PRINTF ("0B10011", "%#B", 19u);
CHECK_PRINTF (" 0b10011", "%#10b", 19u);
CHECK_PRINTF (" 0B10011", "%#10B", 19u);
CHECK_PRINTF ("0b00010011", "%0#10b", 19u);
CHECK_PRINTF ("0B00010011", "%0#10B", 19u);
CHECK_PRINTF ("0b00010011", "%#010b", 19u);
CHECK_PRINTF ("0B00010011", "%#010B", 19u);
CHECK_PRINTF ("0b10011 ", "%#-10b", 19u);
CHECK_PRINTF ("0B10011 ", "%#-10B", 19u);
CHECK_PRINTF ("00010011", "%.8b", 19u);
CHECK_PRINTF ("00010011", "%.8B", 19u);
CHECK_PRINTF ("0b00010011", "%#.8b", 19u);
CHECK_PRINTF ("0B00010011", "%#.8B", 19u);
CHECK_PRINTF (" 00010011", "%15.8b", 19u);
CHECK_PRINTF (" 00010011", "%15.8B", 19u);
CHECK_PRINTF ("00010011 ", "%-15.8b", 19u);
CHECK_PRINTF ("00010011 ", "%-15.8B", 19u);
CHECK_PRINTF (" 0b00010011", "%#15.8b", 19u);
CHECK_PRINTF (" 0B00010011", "%#15.8B", 19u);
CHECK_PRINTF ("0b00010011 ", "%-#15.8b", 19u);
CHECK_PRINTF ("0B00010011 ", "%-#15.8B", 19u);
/* GCC diagnoses ignored flags. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (12, "-Wformat");
/* '0' flag ignored with '-'. */
CHECK_PRINTF ("1011 ", "%0-5b", 11u);
CHECK_PRINTF ("1011 ", "%0-5B", 11u);
CHECK_PRINTF ("0b10011 ", "%#0-10b", 19u);
CHECK_PRINTF ("0B10011 ", "%#0-10B", 19u);
/* '0' flag ignored with precision. */
CHECK_PRINTF (" 00010011", "%015.8b", 19u);
CHECK_PRINTF (" 00010011", "%015.8B", 19u);
CHECK_PRINTF (" 0b00010011", "%0#15.8b", 19u);
CHECK_PRINTF (" 0B00010011", "%0#15.8B", 19u);
DIAG_POP_NEEDS_COMMENT;
/* Test positional argument handling. */
CHECK_PRINTF ("test 1011 test2 100010001000100010001000100010001",
"%2$s %1$b %4$s %3$llb", 11u, "test", 0x111111111ull, "test2");
return 0;
}
DIAG_POP_NEEDS_COMMENT;
#include <support/test-driver.c>
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