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84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
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/* Test scanf formats for nan, nan(), nan(n-char-sequence) types.
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Copyright The GNU Toolchain Authors.
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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 <stdint.h>
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#include <stdio.h>
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#include <support/check.h>
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#define CHECK_SCANF_RET(OK, STR, FMT, ...) \
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do \
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{ \
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int ret = sscanf (STR, FMT, __VA_ARGS__); \
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TEST_VERIFY (ret == (OK)); \
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} \
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while (0)
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/* Valid nan types:
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1. nan
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2. nan()
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3. nan([a-zA-Z0-9_]+)
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Any other nan format is invalid and should produce a conversion error.
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The return value denotes the number of valid conversions. On conversion
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error the rest of the input is discarded. */
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static int
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do_test (void)
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{
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int a;
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float b;
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double c;
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long double d;
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/* All valid inputs. */
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CHECK_SCANF_RET (1, "nan", "%lf", &c);
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CHECK_SCANF_RET (1, "nan()", "%lf", &c);
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CHECK_SCANF_RET (1, "nan(12345)", "%lf", &c);
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CHECK_SCANF_RET (2, "nan12", "%lf%d", &c, &a);
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CHECK_SCANF_RET (2, "nan nan()", "%f%Lf", &b, &d);
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CHECK_SCANF_RET (2, "nan nan(12345foo)", "%lf%Lf", &c, &d);
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CHECK_SCANF_RET (3, "nan nan() 12.234", "%lf%Lf%f", &c, &d, &b);
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CHECK_SCANF_RET (4, "nannan()nan(foo)1234", "%lf%f%Lf%d", &c, &b, &d, &a);
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/* Partially valid inputs. */
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CHECK_SCANF_RET (1, "nan( )", "%3lf", &c);
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CHECK_SCANF_RET (1, "nan nan(", "%lf%f", &c, &b);
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/* Invalid inputs. */
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/* Dangling parentheses. */
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CHECK_SCANF_RET (0, "nan(", "%lf", &c);
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CHECK_SCANF_RET (0, "nan(123", "%lf", &c);
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CHECK_SCANF_RET (0, "nan(12345", "%lf%d", &c, &a);
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/* Field width is not sufficient for valid conversion. */
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CHECK_SCANF_RET (0, "nan()", "%4Lf", &d);
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CHECK_SCANF_RET (0, "nan(1", "%5lf", &c);
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/* Space is not a valid character. */
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CHECK_SCANF_RET (0, "nan( )", "%lf", &c);
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CHECK_SCANF_RET (0, "nan( )12.34", "%Lf%f", &d, &b);
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CHECK_SCANF_RET (0, "nan(12 foo)", "%f", &b);
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/* Period '.' is not a valid character. */
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CHECK_SCANF_RET (0, "nan(12.34) nan(FooBar)", "%lf%Lf", &c, &d);
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return 0;
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}
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#include <support/test-driver.c>
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