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aa4dbb2eeb
Convert 'compare_real', 'read_real', and 'verify_input' macros to functions so as to improve readability and avoid pitfalls. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
132 lines
3.2 KiB
C
132 lines
3.2 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 <stdbool.h>
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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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static bool
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verify_input (char f, type_t val, long long count, int *errp)
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{
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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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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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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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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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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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*errp = err;
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return match;
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}
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