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C2x scanf %wN, %wfN support

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ISO C2x defines scanf length modifiers wN (for intN_t / int_leastN_t /
uintN_t / uint_leastN_t) and wfN (for int_fastN_t / uint_fastN_t).
Add support for those length modifiers, similar to the printf support
previously added.

Tested for x86_64 and x86.
This commit is contained in:
Joseph Myers 2023-09-28 17:27:58 +00:00
parent aea4ddb871
commit cdbf8229bb
8 changed files with 598 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
NEWS
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@ -31,6 +31,13 @@ Major new features:
the process ID associated with the process file descriptor created by
pid_spawn, fork_np, or pidfd_open.
* scanf-family functions now support the wN format length modifiers for
arguments pointing to types intN_t, int_leastN_t, uintN_t or
uint_leastN_t (for example, %w32d to read int32_t or int_least32_t in
decimal, or %w32x to read uint32_t or uint_least32_t in hexadecimal)
and the wfN format length modifiers for arguments pointing to types
int_fastN_t or uint_fastN_t, as specified in draft ISO C2X.
Deprecated and removed features, and other changes affecting compatibility:
[Add deprecations, removals and changes affecting compatibility here]

14
manual/stdio.texi
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@ -3714,6 +3714,20 @@ Specifies that the argument is a @code{ptrdiff_t *}.
This modifier was introduced in @w{ISO C99}.
@item w@var{n}
Specifies that the argument is an @code{int@var{n}_t *} or
@code{int_least@var{n}_t *} (which are the same type), or
@code{uint@var{n}_t *} or @code{uint_least@var{n}_t *} (which are the
same type).
This modifier was introduced in @w{ISO C2X}.
@item wf@var{n}
Specifies that the argument is an @code{int_fast@var{n}_t *} or
@code{uint_fast@var{n}_t *}.
This modifier was introduced in @w{ISO C2X}.
@item z
Specifies that the argument is a @code{size_t *}.

1
stdio-common/Makefile
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@ -243,6 +243,7 @@ tests := \
tst-scanf-binary-c2x \
tst-scanf-binary-gnu11 \
tst-scanf-binary-gnu89 \
tst-scanf-intn \
tst-scanf-round \
tst-scanf-to_inpunct \
tst-setvbuf1 \

479
stdio-common/tst-scanf-intn-main.c Normal file
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@ -0,0 +1,479 @@
/* Test scanf formats for intN_t, int_leastN_t and int_fastN_t types.
Copyright (C) 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 <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include <libc-diag.h>
#include <support/check.h>
/* GCC does not know the %wN or %wfN length modifiers before GCC 13. */
DIAG_PUSH_NEEDS_COMMENT;
#if !__GNUC_PREREQ (13, 0)
DIAG_IGNORE_NEEDS_COMMENT (12, "-Wformat");
DIAG_IGNORE_NEEDS_COMMENT (12, "-Wformat-extra-args");
#endif
#define CHECK_SCANF1(EXPECTED, STR, FMT) \
do \
{ \
var = ((typeof (var)) 0xabababab); \
int ret = SSCANF (L_(STR), L_(FMT), &var); \
TEST_COMPARE (var, (EXPECTED)); \
TEST_COMPARE (ret, 1); \
} \
while (0)
#define CHECK_SCANF1N(EXPECTED, STR, FMT) \
do \
{ \
var = ((typeof (var)) 0xabababab); \
n = 123; \
int ret = SSCANF (L_(STR), L_(FMT), &var, &n); \
TEST_COMPARE (var, (EXPECTED)); \
TEST_COMPARE (n, STRLEN (L_(STR))); \
TEST_COMPARE (ret, 1); \
} \
while (0)
#define CHECK_SCANF_ERR(OK, STR, FMT, ...) \
do \
{ \
int ret = SSCANF (L_(STR), L_(FMT), __VA_ARGS__); \
TEST_VERIFY (ret == (OK)); \
TEST_COMPARE (errno, EINVAL); \
} \
while (0)
static void
test_w8 (void)
{
{
int8_t var, n;
CHECK_SCANF1 (42, "42", "%w8d");
CHECK_SCANF1N (42, "42", "%w8d%w8n");
CHECK_SCANF1 (-43, "-43", "%w8d");
CHECK_SCANF1 (42, "42", "%w8i");
CHECK_SCANF1 (-43, "-43", "%w8i");
CHECK_SCANF1 (123, "0b1111011", "%w8i");
CHECK_SCANF1 (127, "0x7f", "%w8i");
CHECK_SCANF1 (-19, "-023", "%w8i");
}
{
uint8_t var;
int8_t n;
CHECK_SCANF1 (123, "1111011", "%w8b");
CHECK_SCANF1 (19, "023", "%w8o");
CHECK_SCANF1 (50, "50", "%w8u");
CHECK_SCANF1 (65, "41", "%w8x");
CHECK_SCANF1N (65, "41", "%w8x%w8n");
CHECK_SCANF1 (66, "42", "%w8X");
}
{
int_least8_t var, n;
CHECK_SCANF1 (42, "42", "%w8d");
CHECK_SCANF1N (42, "42", "%w8d%w8n");
CHECK_SCANF1 (-43, "-43", "%w8d");
CHECK_SCANF1 (42, "42", "%w8i");
CHECK_SCANF1 (-43, "-43", "%w8i");
CHECK_SCANF1 (123, "0b1111011", "%w8i");
CHECK_SCANF1 (127, "0x7f", "%w8i");
CHECK_SCANF1 (-19, "-023", "%w8i");
}
{
uint_least8_t var;
int_least8_t n;
CHECK_SCANF1 (123, "1111011", "%w8b");
CHECK_SCANF1 (19, "023", "%w8o");
CHECK_SCANF1 (50, "50", "%w8u");
CHECK_SCANF1 (65, "41", "%w8x");
CHECK_SCANF1N (65, "41", "%w8x%w8n");
CHECK_SCANF1 (66, "42", "%w8X");
}
}
static void
test_wf8 (void)
{
{
int_fast8_t var, n;
CHECK_SCANF1 (42, "42", "%wf8d");
CHECK_SCANF1N (42, "42", "%wf8d%wf8n");
CHECK_SCANF1 (-43, "-43", "%wf8d");
CHECK_SCANF1 (42, "42", "%wf8i");
CHECK_SCANF1 (-43, "-43", "%wf8i");
CHECK_SCANF1 (123, "0b1111011", "%wf8i");
CHECK_SCANF1 (127, "0x7f", "%wf8i");
CHECK_SCANF1 (-19, "-023", "%wf8i");
}
{
uint_fast8_t var;
int_fast8_t n;
CHECK_SCANF1 (123, "1111011", "%wf8b");
CHECK_SCANF1 (19, "023", "%wf8o");
CHECK_SCANF1 (50, "50", "%wf8u");
CHECK_SCANF1 (65, "41", "%wf8x");
CHECK_SCANF1N (65, "41", "%wf8x%wf8n");
CHECK_SCANF1 (66, "42", "%wf8X");
}
}
static void
test_w16 (void)
{
{
int16_t var, n;
CHECK_SCANF1 (12345, "12345", "%w16d");
CHECK_SCANF1N (23456, "23456", "%w16d%w16n");
CHECK_SCANF1 (-10101, "-10101", "%w16d");
CHECK_SCANF1 (30000, "30000", "%w16i");
CHECK_SCANF1 (-19876, "-19876", "%w16i");
CHECK_SCANF1 (16384, "0b100000000000000", "%w16i");
CHECK_SCANF1 (32767, "0x7fff", "%w16i");
CHECK_SCANF1 (-16383, "-037777", "%w16i");
}
{
uint16_t var;
int16_t n;
CHECK_SCANF1 (32767, "111111111111111", "%w16b");
CHECK_SCANF1 (4095, "07777", "%w16o");
CHECK_SCANF1 (9999, "9999", "%w16u");
CHECK_SCANF1 (23456, "5ba0", "%w16x");
CHECK_SCANF1N (23456, "5ba0", "%w16x%w16n");
CHECK_SCANF1 (23457, "5ba1", "%w16X");
}
{
int_least16_t var, n;
CHECK_SCANF1 (12345, "12345", "%w16d");
CHECK_SCANF1N (23456, "23456", "%w16d%w16n");
CHECK_SCANF1 (-10101, "-10101", "%w16d");
CHECK_SCANF1 (30000, "30000", "%w16i");
CHECK_SCANF1 (-19876, "-19876", "%w16i");
CHECK_SCANF1 (16384, "0b100000000000000", "%w16i");
CHECK_SCANF1 (32767, "0x7fff", "%w16i");
CHECK_SCANF1 (-16383, "-037777", "%w16i");
}
{
uint_least16_t var;
int_least16_t n;
CHECK_SCANF1 (32767, "111111111111111", "%w16b");
CHECK_SCANF1 (4095, "07777", "%w16o");
CHECK_SCANF1 (9999, "9999", "%w16u");
CHECK_SCANF1 (23456, "5ba0", "%w16x");
CHECK_SCANF1N (23456, "5ba0", "%w16x%w16n");
CHECK_SCANF1 (23457, "5ba1", "%w16X");
}
}
static void
test_wf16 (void)
{
{
int_fast16_t var, n;
CHECK_SCANF1 (12345, "12345", "%wf16d");
CHECK_SCANF1N (23456, "23456", "%wf16d%wf16n");
CHECK_SCANF1 (-10101, "-10101", "%wf16d");
CHECK_SCANF1 (30000, "30000", "%wf16i");
CHECK_SCANF1 (-19876, "-19876", "%wf16i");
CHECK_SCANF1 (16384, "0b100000000000000", "%wf16i");
CHECK_SCANF1 (32767, "0x7fff", "%wf16i");
CHECK_SCANF1 (-16383, "-037777", "%wf16i");
}
{
uint_fast16_t var;
int_fast16_t n;
CHECK_SCANF1 (32767, "111111111111111", "%wf16b");
CHECK_SCANF1 (4095, "07777", "%wf16o");
CHECK_SCANF1 (9999, "9999", "%wf16u");
CHECK_SCANF1 (23456, "5ba0", "%wf16x");
CHECK_SCANF1N (23456, "5ba0", "%wf16x%wf16n");
CHECK_SCANF1 (23457, "5ba1", "%wf16X");
}
#if INT_FAST16_MAX >= INT32_MAX
{
int_fast16_t var, n;
CHECK_SCANF1 (1234567, "1234567", "%wf16d");
CHECK_SCANF1N (2345678, "2345678", "%wf16d%wf16n");
CHECK_SCANF1 (-1010101, "-1010101", "%wf16d");
CHECK_SCANF1 (3000000, "3000000", "%wf16i");
CHECK_SCANF1 (-98765432, "-98765432", "%wf16i");
CHECK_SCANF1 (1048576, "0b100000000000000000000", "%wf16i");
CHECK_SCANF1 (1048575, "0xfffff", "%wf16i");
CHECK_SCANF1 (-1048575, "-03777777", "%wf16i");
}
{
uint_fast16_t var;
int_fast16_t n;
CHECK_SCANF1 (1234567, "100101101011010000111", "%wf16b");
CHECK_SCANF1 (1048575, "03777777", "%wf16o");
CHECK_SCANF1 (999999, "999999", "%wf16u");
CHECK_SCANF1 (987654, "f1206", "%wf16x");
CHECK_SCANF1N (987654, "f1206", "%wf16x%wf16n");
CHECK_SCANF1 (987655, "f1207", "%wf16X");
}
#endif
#if INT_FAST16_MAX >= INT64_MAX
{
int_fast16_t var, n;
CHECK_SCANF1 (123456789012LL, "123456789012", "%wf16d");
CHECK_SCANF1N (234567890123LL, "234567890123", "%wf16d%wf16n");
CHECK_SCANF1 (-10101010101LL, "-10101010101", "%wf16d");
CHECK_SCANF1 (3000000000000000LL, "3000000000000000", "%wf16i");
CHECK_SCANF1 (-9876543210LL, "-9876543210", "%wf16i");
CHECK_SCANF1 (1LL << 40, "0b10000000000000000000000000000000000000000",
"%wf16i");
CHECK_SCANF1 (1LL << 41, "0x20000000000", "%wf16i");
CHECK_SCANF1 (-(1LL << 42), "-0100000000000000", "%wf16i");
}
{
uint_fast16_t var;
int_fast16_t n;
CHECK_SCANF1 (123456789012ULL, "1110010111110100110010001101000010100",
"%wf16b");
CHECK_SCANF1 (1ULL << 40, "20000000000000", "%wf16o");
CHECK_SCANF1 (999999999999ULL, "999999999999", "%wf16u");
CHECK_SCANF1 (9876543210ULL, "24cb016ea", "%wf16x");
CHECK_SCANF1N (9876543210ULL, "24cb016ea", "%wf16x%wf16n");
CHECK_SCANF1 (9876543211ULL, "24cb016eb", "%wf16X");
}
#endif
}
static void
test_w32 (void)
{
{
int32_t var, n;
CHECK_SCANF1 (1234567, "1234567", "%w32d");
CHECK_SCANF1N (2345678, "2345678", "%w32d%w32n");
CHECK_SCANF1 (-1010101, "-1010101", "%w32d");
CHECK_SCANF1 (3000000, "3000000", "%w32i");
CHECK_SCANF1 (-98765432, "-98765432", "%w32i");
CHECK_SCANF1 (1048576, "0b100000000000000000000", "%w32i");
CHECK_SCANF1 (1048575, "0xfffff", "%w32i");
CHECK_SCANF1 (-1048575, "-03777777", "%w32i");
}
{
uint32_t var;
int32_t n;
CHECK_SCANF1 (1234567, "100101101011010000111", "%w32b");
CHECK_SCANF1 (1048575, "03777777", "%w32o");
CHECK_SCANF1 (999999, "999999", "%w32u");
CHECK_SCANF1 (987654, "f1206", "%w32x");
CHECK_SCANF1N (987654, "f1206", "%w32x%w32n");
CHECK_SCANF1 (987655, "f1207", "%w32X");
}
{
int_least32_t var, n;
CHECK_SCANF1 (1234567, "1234567", "%w32d");
CHECK_SCANF1N (2345678, "2345678", "%w32d%w32n");
CHECK_SCANF1 (-1010101, "-1010101", "%w32d");
CHECK_SCANF1 (3000000, "3000000", "%w32i");
CHECK_SCANF1 (-98765432, "-98765432", "%w32i");
CHECK_SCANF1 (1048576, "0b100000000000000000000", "%w32i");
CHECK_SCANF1 (1048575, "0xfffff", "%w32i");
CHECK_SCANF1 (-1048575, "-03777777", "%w32i");
}
{
uint_least32_t var;
int_least32_t n;
CHECK_SCANF1 (1234567, "100101101011010000111", "%w32b");
CHECK_SCANF1 (1048575, "03777777", "%w32o");
CHECK_SCANF1 (999999, "999999", "%w32u");
CHECK_SCANF1 (987654, "f1206", "%w32x");
CHECK_SCANF1N (987654, "f1206", "%w32x%w32n");
CHECK_SCANF1 (987655, "f1207", "%w32X");
}
}
static void
test_wf32 (void)
{
{
int_fast32_t var, n;
CHECK_SCANF1 (1234567, "1234567", "%wf32d");
CHECK_SCANF1N (2345678, "2345678", "%wf32d%wf32n");
CHECK_SCANF1 (-1010101, "-1010101", "%wf32d");
CHECK_SCANF1 (3000000, "3000000", "%wf32i");
CHECK_SCANF1 (-98765432, "-98765432", "%wf32i");
CHECK_SCANF1 (1048576, "0b100000000000000000000", "%wf32i");
CHECK_SCANF1 (1048575, "0xfffff", "%wf32i");
CHECK_SCANF1 (-1048575, "-03777777", "%wf32i");
}
{
uint_fast32_t var;
int_fast32_t n;
CHECK_SCANF1 (1234567, "100101101011010000111", "%wf32b");
CHECK_SCANF1 (1048575, "03777777", "%wf32o");
CHECK_SCANF1 (999999, "999999", "%wf32u");
CHECK_SCANF1 (987654, "f1206", "%wf32x");
CHECK_SCANF1N (987654, "f1206", "%wf32x%wf32n");
CHECK_SCANF1 (987655, "f1207", "%wf32X");
}
#if INT_FAST32_MAX >= INT64_MAX
{
int_fast32_t var, n;
CHECK_SCANF1 (123456789012LL, "123456789012", "%wf32d");
CHECK_SCANF1N (234567890123LL, "234567890123", "%wf32d%wf32n");
CHECK_SCANF1 (-10101010101LL, "-10101010101", "%wf32d");
CHECK_SCANF1 (3000000000000000LL, "3000000000000000", "%wf32i");
CHECK_SCANF1 (-9876543210LL, "-9876543210", "%wf32i");
CHECK_SCANF1 (1LL << 40, "0b10000000000000000000000000000000000000000",
"%wf32i");
CHECK_SCANF1 (1LL << 41, "0x20000000000", "%wf32i");
CHECK_SCANF1 (-(1LL << 42), "-0100000000000000", "%wf32i");
}
{
uint_fast32_t var;
int_fast32_t n;
CHECK_SCANF1 (123456789012ULL, "1110010111110100110010001101000010100",
"%wf32b");
CHECK_SCANF1 (1ULL << 40, "20000000000000", "%wf32o");
CHECK_SCANF1 (999999999999ULL, "999999999999", "%wf32u");
CHECK_SCANF1 (9876543210ULL, "24cb016ea", "%wf32x");
CHECK_SCANF1N (9876543210ULL, "24cb016ea", "%wf32x%wf32n");
CHECK_SCANF1 (9876543211ULL, "24cb016eb", "%wf32X");
}
#endif
}
static void
test_w64 (void)
{
{
int64_t var, n;
CHECK_SCANF1 (123456789012LL, "123456789012", "%w64d");
CHECK_SCANF1N (234567890123LL, "234567890123", "%w64d%w64n");
CHECK_SCANF1 (-10101010101LL, "-10101010101", "%w64d");
CHECK_SCANF1 (3000000000000000LL, "3000000000000000", "%w64i");
CHECK_SCANF1 (-9876543210LL, "-9876543210", "%w64i");
CHECK_SCANF1 (1LL << 40, "0b10000000000000000000000000000000000000000",
"%w64i");
CHECK_SCANF1 (1LL << 41, "0x20000000000", "%w64i");
CHECK_SCANF1 (-(1LL << 42), "-0100000000000000", "%w64i");
}
{
uint64_t var;
int64_t n;
CHECK_SCANF1 (123456789012ULL, "1110010111110100110010001101000010100",
"%w64b");
CHECK_SCANF1 (1ULL << 40, "20000000000000", "%w64o");
CHECK_SCANF1 (999999999999ULL, "999999999999", "%w64u");
CHECK_SCANF1 (9876543210ULL, "24cb016ea", "%w64x");
CHECK_SCANF1N (9876543210ULL, "24cb016ea", "%w64x%w64n");
CHECK_SCANF1 (9876543211ULL, "24cb016eb", "%w64X");
}
{
int_least64_t var, n;
CHECK_SCANF1 (123456789012LL, "123456789012", "%w64d");
CHECK_SCANF1N (234567890123LL, "234567890123", "%w64d%w64n");
CHECK_SCANF1 (-10101010101LL, "-10101010101", "%w64d");
CHECK_SCANF1 (3000000000000000LL, "3000000000000000", "%w64i");
CHECK_SCANF1 (-9876543210LL, "-9876543210", "%w64i");
CHECK_SCANF1 (1LL << 40, "0b10000000000000000000000000000000000000000",
"%w64i");
CHECK_SCANF1 (1LL << 41, "0x20000000000", "%w64i");
CHECK_SCANF1 (-(1LL << 42), "-0100000000000000", "%w64i");
}
{
uint_least64_t var;
int_least64_t n;
CHECK_SCANF1 (123456789012ULL, "1110010111110100110010001101000010100",
"%w64b");
CHECK_SCANF1 (1ULL << 40, "20000000000000", "%w64o");
CHECK_SCANF1 (999999999999ULL, "999999999999", "%w64u");
CHECK_SCANF1 (9876543210ULL, "24cb016ea", "%w64x");
CHECK_SCANF1N (9876543210ULL, "24cb016ea", "%w64x%w64n");
CHECK_SCANF1 (9876543211ULL, "24cb016eb", "%w64X");
}
}
static void
test_wf64 (void)
{
{
int_fast64_t var, n;
CHECK_SCANF1 (123456789012LL, "123456789012", "%wf64d");
CHECK_SCANF1N (234567890123LL, "234567890123", "%wf64d%wf64n");
CHECK_SCANF1 (-10101010101LL, "-10101010101", "%wf64d");
CHECK_SCANF1 (3000000000000000LL, "3000000000000000", "%wf64i");
CHECK_SCANF1 (-9876543210LL, "-9876543210", "%wf64i");
CHECK_SCANF1 (1LL << 40, "0b10000000000000000000000000000000000000000",
"%wf64i");
CHECK_SCANF1 (1LL << 41, "0x20000000000", "%wf64i");
CHECK_SCANF1 (-(1LL << 42), "-0100000000000000", "%wf64i");
}
{
uint_fast64_t var;
int_fast64_t n;
CHECK_SCANF1 (123456789012ULL, "1110010111110100110010001101000010100",
"%wf64b");
CHECK_SCANF1 (1ULL << 40, "20000000000000", "%wf64o");
CHECK_SCANF1 (999999999999ULL, "999999999999", "%wf64u");
CHECK_SCANF1 (9876543210ULL, "24cb016ea", "%wf64x");
CHECK_SCANF1N (9876543210ULL, "24cb016ea", "%wf64x%wf64n");
CHECK_SCANF1 (9876543211ULL, "24cb016eb", "%wf64X");
}
}
static int
do_test (void)
{
int a, b;
test_w8 ();
test_wf8 ();
test_w16 ();
test_wf16 ();
test_w32 ();
test_wf32 ();
test_w64 ();
test_wf64 ();
/* Bad N in %wN and %wfN are required to produce an error return (of
the number of input items assigned) from scanf functions (and can
also be seen to be invalid at compile time). */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (13, "-Wformat");
DIAG_IGNORE_NEEDS_COMMENT (13, "-Wformat-extra-args");
CHECK_SCANF_ERR (0, "1", "%w1d", &a);
CHECK_SCANF_ERR (0, "1", "%w123d", &a);
CHECK_SCANF_ERR (0, "1", "%w99999999999999999999d", &a);
CHECK_SCANF_ERR (0, "1", "%wf1d", &a);
CHECK_SCANF_ERR (0, "1", "%wf123d", &a);
CHECK_SCANF_ERR (0, "1", "%wf99999999999999999999d", &a);
CHECK_SCANF_ERR (1, "1 1", "%d %w1d", &a, &b);
CHECK_SCANF_ERR (1, "1 1", "%d %w123d", &a, &b);
CHECK_SCANF_ERR (1, "1 1", "%d %w99999999999999999999d", &a, &b);
CHECK_SCANF_ERR (1, "1 1", "%d %wf1d", &a, &b);
CHECK_SCANF_ERR (1, "1 1", "%d %wf123d", &a, &b);
CHECK_SCANF_ERR (1, "1 1", "%d %wf99999999999999999999d", &a, &b);
CHECK_SCANF_ERR (0, "1", "%1$w1d", &a);
CHECK_SCANF_ERR (0, "1", "%1$w123d", &a);
CHECK_SCANF_ERR (0, "1", "%1$w99999999999999999999d", &a);
CHECK_SCANF_ERR (0, "1", "%1$wf1d", &a);
CHECK_SCANF_ERR (0, "1", "%1$wf123d", &a);
CHECK_SCANF_ERR (0, "1", "%1$wf99999999999999999999d", &a);
DIAG_POP_NEEDS_COMMENT;
return 0;
}
DIAG_POP_NEEDS_COMMENT;
#include <support/test-driver.c>

24
stdio-common/tst-scanf-intn.c Normal file
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@ -0,0 +1,24 @@
/* Test scanf formats for intN_t, int_leastN_t and int_fastN_t types.
Narrow string version.
Copyright (C) 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/>. */
#define SSCANF sscanf
#define STRLEN strlen
#define L_(C) C
#include <tst-scanf-intn-main.c>

48
stdio-common/vfscanf-internal.c
View File

@ -381,6 +381,7 @@ __vfscanf_internal (FILE *s, const char *format, va_list argptr,
while (*f != '\0')
{
unsigned int argpos;
bool is_fast;
/* Extract the next argument, which is of type TYPE.
For a %N$... spec, this is the Nth argument from the beginning;
otherwise it is the next argument after the state now in ARG. */
@ -602,6 +603,53 @@ __vfscanf_internal (FILE *s, const char *format, va_list argptr,
else if (sizeof (ptrdiff_t) > sizeof (int))
flags |= LONG;
break;
case L_('w'):
{
is_fast = false;
if (*f == L_('f'))
{
++f;
is_fast = true;
}
int bitwidth = 0;
if (ISDIGIT (*f))
bitwidth = read_int (&f);
if (is_fast)
switch (bitwidth)
{
case 8:
bitwidth = INT_FAST8_WIDTH;
break;
case 16:
bitwidth = INT_FAST16_WIDTH;
break;
case 32:
bitwidth = INT_FAST32_WIDTH;
break;
case 64:
bitwidth = INT_FAST64_WIDTH;
break;
}
switch (bitwidth)
{
case 8:
flags |= CHAR;
break;
case 16:
flags |= SHORT;
break;
case 32:
break;
case 64:
flags |= LONGDBL | LONG;
break;
default:
/* ISO C requires this error to be detected. */
__set_errno (EINVAL);
goto errout;
}
}
break;
default:
/* Not a recognized modifier. Backup. */
--f;

1
wcsmbs/Makefile
View File

@ -196,6 +196,7 @@ tests := \
tst-wscanf-binary-c2x \
tst-wscanf-binary-gnu11 \
tst-wscanf-binary-gnu89 \
tst-wscanf-intn \
tst-wscanf-to_inpunct \
wcsatcliff \
wcsmbs-tst1 \

24
wcsmbs/tst-wscanf-intn.c Normal file
View File

@ -0,0 +1,24 @@
/* Test scanf formats for intN_t, int_leastN_t and int_fastN_t types.
Wide string version.
Copyright (C) 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/>. */
#define SSCANF swscanf
#define STRLEN wcslen
#define L_(C) L ## C
#include "../stdio-common/tst-scanf-intn-main.c"