mirror of git://sourceware.org/git/glibc.git
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/* Test feature wrapper for formatted 'scanf' 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 <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <support/support.h>
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static char *sscanf_buf;
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static size_t sscanf_buf_size;
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static void __attribute__ ((destructor))
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scanf_under_test_fini (void)
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{
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free (sscanf_buf);
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}
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#define scanf_under_test(...) \
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({ \
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__label__ out; \
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size_t i = 0; \
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int result; \
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int ch; \
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\
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do \
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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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result = ch; \
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goto out; \
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} \
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if (i == sscanf_buf_size) \
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{ \
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sscanf_buf_size += SIZE_CHUNK; \
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/* Add an extra byte for the terminating null character. */ \
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sscanf_buf = xrealloc (sscanf_buf, sscanf_buf_size + 1); \
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} \
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sscanf_buf[i++] = ch; \
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} \
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while (ch != ':'); \
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sscanf_buf[i++] = '\0'; \
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\
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ch = ungetc (ch, stdin); \
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if (ch == EOF) \
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{ \
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result = INPUT_ERROR; \
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goto out; \
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} \
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\
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result = sscanf (sscanf_buf, __VA_ARGS__); \
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if (result == EOF) \
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result = INPUT_EOF; \
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\
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out: \
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result; \
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})
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