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support: Report errno constants in TEST_COMPARE failures
If the expression is errno, decode it as an errno constant using strerrorname_np. Reviewed-by: Arjun Shankar <arjun@redhat.com>
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@ -17,7 +17,9 @@
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <support/check.h>
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static void
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@ -31,7 +33,14 @@ report (const char *which, const char *expr, long long value, int positive,
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printf ("%lld", value);
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unsigned long long mask
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= (~0ULL) >> (8 * (sizeof (unsigned long long) - size));
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printf (" (0x%llx); from: %s\n", (unsigned long long) value & mask, expr);
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const char *errno_constant = NULL;
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if (strcmp (expr, "errno") == 0
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&& positive && (unsigned long long int) value <= INT_MAX)
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errno_constant = strerrorname_np (value);
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printf (" (0x%llx", (unsigned long long) value & mask);
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if (errno_constant != NULL)
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printf (", %s", errno_constant);
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printf ("); from: %s\n", expr);
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}
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void
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