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73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
8 years ago
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/* Copyright (C) 1991-2016 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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<http://www.gnu.org/licenses/>. */
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/*
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* ISO C99 Standard: 7.5 Errors <errno.h>
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*/
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#ifndef _ERRNO_H
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/* The includer defined __need_Emath if he wants only the definitions
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of EDOM and ERANGE, and not everything else. */
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#ifndef __need_Emath
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# define _ERRNO_H 1
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# include <features.h>
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#endif
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__BEGIN_DECLS
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/* Get the error number constants from the system-specific file.
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This file will test __need_Emath and _ERRNO_H. */
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#include <bits/errno.h>
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#undef __need_Emath
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#ifdef _ERRNO_H
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/* Declare the `errno' variable, unless it's defined as a macro by
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bits/errno.h. This is the case in GNU, where it is a per-thread
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variable. This redeclaration using the macro still works, but it
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will be a function declaration without a prototype and may trigger
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a -Wstrict-prototypes warning. */
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#ifndef errno
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extern int errno;
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#endif
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#ifdef __USE_GNU
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/* The full and simple forms of the name with which the program was
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invoked. These variables are set up automatically at startup based on
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the value of ARGV[0] (this works only if you use GNU ld). */
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extern char *program_invocation_name, *program_invocation_short_name;
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#endif /* __USE_GNU */
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#endif /* _ERRNO_H */
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__END_DECLS
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#endif /* _ERRNO_H */
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/* The Hurd <bits/errno.h> defines `error_t' as an enumerated type so
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that printing `error_t' values in the debugger shows the names. We
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might need this definition sometimes even if this file was included
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before. */
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#if defined __USE_GNU || defined __need_error_t
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# ifndef __error_t_defined
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typedef int error_t;
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# define __error_t_defined 1
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# endif
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# undef __need_error_t
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#endif
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