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d1a621b735
Add a collection of tests for formatted scanf input specifiers covering the b, d, i, o, u, x, and X integer conversions, the a, A, e, E, f, F, g, and G floating-point conversions, and the [, c, and s character conversions. Also the hh, h, l, and ll length modifiers are covered with the integer conversions as are the l and L length modifier with the floating-point conversions. The tests cover assignment suppressing and the field width as well, verifying the number of assignments made, the number of characters consumed and the value assigned. Add the common test code here as well as test cases for scanf, and then base Makefile infrastructure plus target-agnostic input data, for the character conversions and the `char', `short', and `long long' integer ones, signed and unsigned, with remaining input data and other functions from the scanf family deferred to subsequent additions. Keep input data disabled and referring to BZ #12701 for entries that are currently incorrectly accepted as valid data, such as '0b' or '0x' with the relevant integer conversions or sequences of an insufficient number of characters with the c conversion. Reviewed-by: Joseph Myers <josmyers@redhat.com>
131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/* Test feature wrapper for formatted character input.
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Copyright (C) 2025 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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#include <string.h>
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#include <support/next_to_fault.h>
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/* Reference data is a sequence of characters to match against
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byte-wise.
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For the 's' conversion specifier the number of characters read
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from input includes any leading white-space characters consumed
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as well, so we also consider it a successful match when the ':'
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character following the reference data matches a terminating null
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character in the output produced by the 'scanf' family function
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under test while the character count hasn't been exhausted yet.
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The buffer is preinitialized to contain repeating '\xa5' character
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so as to catch missing data output. Also no data is expected to be
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written beyond the character sequence received, which is verified
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by checking the following character in the buffer to remain '\xa5'. */
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#define SCANF_BUFFER_SIZE 65536
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static struct support_next_to_fault ntf;
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#define PREPARE initialize_value_init
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static void
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initialize_value_init (int argc, char **argv)
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{
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ntf = support_next_to_fault_allocate (SCANF_BUFFER_SIZE);
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}
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static void __attribute__ ((destructor))
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initialize_value_fini (void)
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{
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support_next_to_fault_free (&ntf);
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}
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#define pointer_to_value(val) (val)
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#define initialize_value(val) \
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do \
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{ \
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val = ntf.buffer; \
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memset (val, 0xa5, SCANF_BUFFER_SIZE); \
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} \
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while (0)
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#define verify_input(f, val, count, errp) \
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({ \
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__label__ out, skip; \
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bool match = true; \
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int err = 0; \
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size_t i; \
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int ch; \
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\
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for (i = 0; i < count; i++) \
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{ \
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ch = read_input (); \
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if (ch < 0) \
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{ \
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err = ch; \
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goto out; \
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} \
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if (ch == ':' && val[i] == '\0' && f == 's') \
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goto skip; \
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if (ch != val[i]) \
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{ \
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match = false; \
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goto out; \
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} \
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} \
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ch = read_input (); \
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if (ch < 0) \
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{ \
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err = ch; \
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goto out; \
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} \
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\
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skip: \
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if (f != 'c' && val[i++] != '\0') \
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{ \
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err = OUTPUT_TERM; \
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goto out; \
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} \
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if (val[i] != '\xa5') \
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{ \
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err = OUTPUT_OVERRUN; \
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goto out; \
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} \
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\
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while (ch != ':') \
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{ \
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ch = read_input (); \
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if (ch < 0) \
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{ \
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err = ch; \
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goto out; \
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} \
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match = false; \
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} \
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\
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out: \
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if (err || !match) \
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{ \
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printf ("error: %s:%d: input buffer: `", __FILE__, __LINE__); \
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for (size_t j = 0; j <= i; j++) \
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printf ("%c", val[j]); \
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printf ("'\n"); \
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} \
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\
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*errp = err; \
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match; \
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})
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