mirror of
https://gitlab.gnome.org/GNOME/glib.git
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92e3189613
All versions since Visual C++ 2005 have this available, so we can just use it for G_STRUCT_OFFSET. See: https://msdn.microsoft.com/en-us/library/dz4y9b9a.aspx
471 lines
17 KiB
C
471 lines
17 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This 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 of the License, or (at your option) any later version.
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*
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* This 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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/* This file must not include any other glib header file and must thus
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* not refer to variables from glibconfig.h
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*/
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#ifndef __G_MACROS_H__
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#define __G_MACROS_H__
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#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
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#error "Only <glib.h> can be included directly."
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#endif
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/* We include stddef.h to get the system's definition of NULL
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*/
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#include <stddef.h>
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#define G_GNUC_CHECK_VERSION(major, minor) \
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(defined(__GNUC__) && \
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((__GNUC__ > (major)) || \
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((__GNUC__ == (major)) && \
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(__GNUC_MINOR__ >= (minor)))))
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/* Here we provide G_GNUC_EXTENSION as an alias for __extension__,
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* where this is valid. This allows for warningless compilation of
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* "long long" types even in the presence of '-ansi -pedantic'.
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*/
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
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#define G_GNUC_EXTENSION __extension__
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#else
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#define G_GNUC_EXTENSION
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#endif
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/* Every compiler that we target supports inlining, but some of them may
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* complain about it if we don't say "__inline". If we have C99, or if
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* we are using C++, then we can use "inline" directly. Unfortunately
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* Visual Studio does not support __STDC_VERSION__, so we need to check
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* whether we are on Visual Studio 2013 or earlier to see that we need to
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* say "__inline" in C mode.
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* Otherwise, we say "__inline" to avoid the warning.
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*/
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#define G_CAN_INLINE
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#ifndef __cplusplus
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# ifdef _MSC_VER
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# if (_MSC_VER < 1900)
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# define G_INLINE_DEFINE_NEEDED
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# endif
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# elif !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199900)
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# define G_INLINE_DEFINE_NEEDED
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# endif
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#endif
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#ifdef G_INLINE_DEFINE_NEEDED
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# undef inline
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# define inline __inline
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#endif
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#undef G_INLINE_DEFINE_NEEDED
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/* For historical reasons we need to continue to support those who
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* define G_IMPLEMENT_INLINES to mean "don't implement this here".
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*/
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#ifdef G_IMPLEMENT_INLINES
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# define G_INLINE_FUNC extern
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# undef G_CAN_INLINE
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#else
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# define G_INLINE_FUNC static inline
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#endif /* G_IMPLEMENT_INLINES */
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/* Provide macros to feature the GCC function attribute.
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*/
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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#define G_GNUC_PURE __attribute__((__pure__))
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#define G_GNUC_MALLOC __attribute__((__malloc__))
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#else
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#define G_GNUC_PURE
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#define G_GNUC_MALLOC
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#endif
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#if __GNUC__ >= 4
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#define G_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
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#else
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#define G_GNUC_NULL_TERMINATED
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#endif
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/* Clang feature detection: http://clang.llvm.org/docs/LanguageExtensions.html */
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#ifndef __has_attribute
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#define __has_attribute(x) 0
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#endif
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#if (!defined(__clang__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || \
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(defined(__clang__) && __has_attribute(__alloc_size__))
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#define G_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
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#define G_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
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#else
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#define G_GNUC_ALLOC_SIZE(x)
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#define G_GNUC_ALLOC_SIZE2(x,y)
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#endif
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
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#define G_GNUC_PRINTF( format_idx, arg_idx ) \
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__attribute__((__format__ (__printf__, format_idx, arg_idx)))
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#define G_GNUC_SCANF( format_idx, arg_idx ) \
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__attribute__((__format__ (__scanf__, format_idx, arg_idx)))
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#define G_GNUC_FORMAT( arg_idx ) \
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__attribute__((__format_arg__ (arg_idx)))
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#define G_GNUC_NORETURN \
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__attribute__((__noreturn__))
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#define G_GNUC_CONST \
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__attribute__((__const__))
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#define G_GNUC_UNUSED \
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__attribute__((__unused__))
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#define G_GNUC_NO_INSTRUMENT \
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__attribute__((__no_instrument_function__))
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#else /* !__GNUC__ */
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#define G_GNUC_PRINTF( format_idx, arg_idx )
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#define G_GNUC_SCANF( format_idx, arg_idx )
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#define G_GNUC_FORMAT( arg_idx )
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#define G_GNUC_NORETURN
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#define G_GNUC_CONST
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#define G_GNUC_UNUSED
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#define G_GNUC_NO_INSTRUMENT
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#endif /* !__GNUC__ */
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
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#define G_GNUC_DEPRECATED __attribute__((__deprecated__))
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#else
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#define G_GNUC_DEPRECATED
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#endif /* __GNUC__ */
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
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#define G_GNUC_DEPRECATED_FOR(f) \
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__attribute__((deprecated("Use " #f " instead")))
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#else
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#define G_GNUC_DEPRECATED_FOR(f) G_GNUC_DEPRECATED
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#endif /* __GNUC__ */
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
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#define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
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_Pragma ("GCC diagnostic push") \
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_Pragma ("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
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#define G_GNUC_END_IGNORE_DEPRECATIONS \
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_Pragma ("GCC diagnostic pop")
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#elif defined (_MSC_VER) && (_MSC_VER >= 1500)
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#define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
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__pragma (warning (push)) \
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__pragma (warning (disable : 4996))
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#define G_GNUC_END_IGNORE_DEPRECATIONS \
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__pragma (warning (pop))
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#elif defined (__clang__)
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#define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
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_Pragma("clang diagnostic push") \
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_Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"")
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#define G_GNUC_END_IGNORE_DEPRECATIONS \
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_Pragma("clang diagnostic pop")
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#else
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#define G_GNUC_BEGIN_IGNORE_DEPRECATIONS
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#define G_GNUC_END_IGNORE_DEPRECATIONS
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#endif
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
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#define G_GNUC_MAY_ALIAS __attribute__((may_alias))
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#else
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#define G_GNUC_MAY_ALIAS
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#endif
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
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#define G_GNUC_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#else
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#define G_GNUC_WARN_UNUSED_RESULT
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#endif /* __GNUC__ */
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#ifndef G_DISABLE_DEPRECATED
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/* Wrap the gcc __PRETTY_FUNCTION__ and __FUNCTION__ variables with
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* macros, so we can refer to them as strings unconditionally.
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* usage not-recommended since gcc-3.0
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*/
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#if defined (__GNUC__) && (__GNUC__ < 3)
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#define G_GNUC_FUNCTION __FUNCTION__
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#define G_GNUC_PRETTY_FUNCTION __PRETTY_FUNCTION__
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#else /* !__GNUC__ */
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#define G_GNUC_FUNCTION ""
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#define G_GNUC_PRETTY_FUNCTION ""
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#endif /* !__GNUC__ */
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#endif /* !G_DISABLE_DEPRECATED */
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#if __has_feature(attribute_analyzer_noreturn) && defined(__clang_analyzer__)
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#define G_ANALYZER_ANALYZING 1
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#define G_ANALYZER_NORETURN __attribute__((analyzer_noreturn))
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#else
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#define G_ANALYZER_ANALYZING 0
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#define G_ANALYZER_NORETURN
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#endif
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#define G_STRINGIFY(macro_or_string) G_STRINGIFY_ARG (macro_or_string)
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#define G_STRINGIFY_ARG(contents) #contents
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#ifndef __GI_SCANNER__ /* The static assert macro really confuses the introspection parser */
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#define G_PASTE_ARGS(identifier1,identifier2) identifier1 ## identifier2
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#define G_PASTE(identifier1,identifier2) G_PASTE_ARGS (identifier1, identifier2)
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#ifdef __COUNTER__
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#define G_STATIC_ASSERT(expr) typedef char G_PASTE (_GStaticAssertCompileTimeAssertion_, __COUNTER__)[(expr) ? 1 : -1] G_GNUC_UNUSED
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#else
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#define G_STATIC_ASSERT(expr) typedef char G_PASTE (_GStaticAssertCompileTimeAssertion_, __LINE__)[(expr) ? 1 : -1] G_GNUC_UNUSED
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#endif
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#define G_STATIC_ASSERT_EXPR(expr) ((void) sizeof (char[(expr) ? 1 : -1]))
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#endif
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/* Provide a string identifying the current code position */
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#if defined(__GNUC__) && (__GNUC__ < 3) && !defined(__cplusplus)
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#define G_STRLOC __FILE__ ":" G_STRINGIFY (__LINE__) ":" __PRETTY_FUNCTION__ "()"
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#else
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#define G_STRLOC __FILE__ ":" G_STRINGIFY (__LINE__)
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#endif
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/* Provide a string identifying the current function, non-concatenatable */
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#if defined (__GNUC__) && defined (__cplusplus)
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#define G_STRFUNC ((const char*) (__PRETTY_FUNCTION__))
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#elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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#define G_STRFUNC ((const char*) (__func__))
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#elif defined (__GNUC__) || (defined(_MSC_VER) && (_MSC_VER > 1300))
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#define G_STRFUNC ((const char*) (__FUNCTION__))
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#else
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#define G_STRFUNC ((const char*) ("???"))
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#endif
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/* Guard C code in headers, while including them from C++ */
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#ifdef __cplusplus
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#define G_BEGIN_DECLS extern "C" {
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#define G_END_DECLS }
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#else
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#define G_BEGIN_DECLS
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#define G_END_DECLS
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#endif
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/* Provide definitions for some commonly used macros.
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* Some of them are only provided if they haven't already
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* been defined. It is assumed that if they are already
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* defined then the current definition is correct.
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*/
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#ifndef NULL
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# ifdef __cplusplus
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# define NULL (0L)
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# else /* !__cplusplus */
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# define NULL ((void*) 0)
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# endif /* !__cplusplus */
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#endif
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#ifndef FALSE
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#define FALSE (0)
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#endif
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#ifndef TRUE
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#define TRUE (!FALSE)
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#endif
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#undef MAX
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#define MAX(a, b) (((a) > (b)) ? (a) : (b))
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#undef MIN
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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#undef ABS
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#define ABS(a) (((a) < 0) ? -(a) : (a))
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#undef CLAMP
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#define CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
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/* Count the number of elements in an array. The array must be defined
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* as such; using this with a dynamically allocated array will give
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* incorrect results.
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*/
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#define G_N_ELEMENTS(arr) (sizeof (arr) / sizeof ((arr)[0]))
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/* Macros by analogy to GINT_TO_POINTER, GPOINTER_TO_INT
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*/
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#define GPOINTER_TO_SIZE(p) ((gsize) (p))
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#define GSIZE_TO_POINTER(s) ((gpointer) (gsize) (s))
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/* Provide convenience macros for handling structure
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* fields through their offsets.
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*/
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#if (defined(__GNUC__) && __GNUC__ >= 4) || defined (_MSC_VER)
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#define G_STRUCT_OFFSET(struct_type, member) \
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((glong) offsetof (struct_type, member))
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#else
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#define G_STRUCT_OFFSET(struct_type, member) \
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((glong) ((guint8*) &((struct_type*) 0)->member))
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#endif
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#define G_STRUCT_MEMBER_P(struct_p, struct_offset) \
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((gpointer) ((guint8*) (struct_p) + (glong) (struct_offset)))
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#define G_STRUCT_MEMBER(member_type, struct_p, struct_offset) \
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(*(member_type*) G_STRUCT_MEMBER_P ((struct_p), (struct_offset)))
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/* Provide simple macro statement wrappers:
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* G_STMT_START { statements; } G_STMT_END;
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* This can be used as a single statement, like:
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* if (x) G_STMT_START { ... } G_STMT_END; else ...
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* This intentionally does not use compiler extensions like GCC's '({...})' to
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* avoid portability issue or side effects when compiled with different compilers.
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* MSVC complains about "while(0)": C4127: "Conditional expression is constant",
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* so we use __pragma to avoid the warning since the use here is intentional.
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*/
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#if !(defined (G_STMT_START) && defined (G_STMT_END))
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#define G_STMT_START do
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#if defined (_MSC_VER) && (_MSC_VER >= 1500)
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#define G_STMT_END \
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__pragma(warning(push)) \
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__pragma(warning(disable:4127)) \
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while(0) \
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__pragma(warning(pop))
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#else
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#define G_STMT_END while (0)
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#endif
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#endif
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/* Deprecated -- do not use. */
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#ifndef G_DISABLE_DEPRECATED
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#ifdef G_DISABLE_CONST_RETURNS
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#define G_CONST_RETURN
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#else
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#define G_CONST_RETURN const
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#endif
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#endif
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/*
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* The G_LIKELY and G_UNLIKELY macros let the programmer give hints to
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* the compiler about the expected result of an expression. Some compilers
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* can use this information for optimizations.
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*
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* The _G_BOOLEAN_EXPR macro is intended to trigger a gcc warning when
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* putting assignments in g_return_if_fail ().
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*/
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#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
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#define _G_BOOLEAN_EXPR(expr) \
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G_GNUC_EXTENSION ({ \
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int _g_boolean_var_; \
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if (expr) \
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_g_boolean_var_ = 1; \
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else \
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_g_boolean_var_ = 0; \
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_g_boolean_var_; \
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})
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#define G_LIKELY(expr) (__builtin_expect (_G_BOOLEAN_EXPR((expr)), 1))
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#define G_UNLIKELY(expr) (__builtin_expect (_G_BOOLEAN_EXPR((expr)), 0))
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#else
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#define G_LIKELY(expr) (expr)
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#define G_UNLIKELY(expr) (expr)
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#endif
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
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#define G_DEPRECATED __attribute__((__deprecated__))
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#elif defined(_MSC_VER) && (_MSC_VER >= 1300)
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#define G_DEPRECATED __declspec(deprecated)
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#else
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#define G_DEPRECATED
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#endif
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
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#define G_DEPRECATED_FOR(f) __attribute__((__deprecated__("Use '" #f "' instead")))
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#elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320)
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#define G_DEPRECATED_FOR(f) __declspec(deprecated("is deprecated. Use '" #f "' instead"))
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#else
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#define G_DEPRECATED_FOR(f) G_DEPRECATED
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#endif
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
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#define G_UNAVAILABLE(maj,min) __attribute__((deprecated("Not available before " #maj "." #min)))
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#elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320)
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#define G_UNAVAILABLE(maj,min) __declspec(deprecated("is not available before " #maj "." #min))
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#else
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#define G_UNAVAILABLE(maj,min) G_DEPRECATED
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#endif
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#ifndef _GLIB_EXTERN
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#define _GLIB_EXTERN extern
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#endif
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/* These macros are used to mark deprecated functions in GLib headers,
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* and thus have to be exposed in installed headers. But please
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* do *not* use them in other projects. Instead, use G_DEPRECATED
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* or define your own wrappers around it.
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*/
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#ifdef GLIB_DISABLE_DEPRECATION_WARNINGS
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#define GLIB_DEPRECATED _GLIB_EXTERN
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#define GLIB_DEPRECATED_FOR(f) _GLIB_EXTERN
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#define GLIB_UNAVAILABLE(maj,min) _GLIB_EXTERN
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#else
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#define GLIB_DEPRECATED G_DEPRECATED _GLIB_EXTERN
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#define GLIB_DEPRECATED_FOR(f) G_DEPRECATED_FOR(f) _GLIB_EXTERN
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#define GLIB_UNAVAILABLE(maj,min) G_UNAVAILABLE(maj,min) _GLIB_EXTERN
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#endif
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#ifdef __GNUC__
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/* these macros are private */
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#define _GLIB_AUTOPTR_FUNC_NAME(TypeName) glib_autoptr_cleanup_##TypeName
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#define _GLIB_AUTOPTR_TYPENAME(TypeName) TypeName##_autoptr
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#define _GLIB_AUTO_FUNC_NAME(TypeName) glib_auto_cleanup_##TypeName
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#define _GLIB_CLEANUP(func) __attribute__((cleanup(func)))
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#define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName) \
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typedef ModuleObjName *_GLIB_AUTOPTR_TYPENAME(ModuleObjName); \
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static inline void _GLIB_AUTOPTR_FUNC_NAME(ModuleObjName) (ModuleObjName **_ptr) { \
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_GLIB_AUTOPTR_FUNC_NAME(ParentName) ((ParentName **) _ptr); } \
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/* these macros are API */
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#define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func) \
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typedef TypeName *_GLIB_AUTOPTR_TYPENAME(TypeName); \
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
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static inline void _GLIB_AUTOPTR_FUNC_NAME(TypeName) (TypeName **_ptr) { if (*_ptr) (func) (*_ptr); } \
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G_GNUC_END_IGNORE_DEPRECATIONS
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#define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func) \
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
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static inline void _GLIB_AUTO_FUNC_NAME(TypeName) (TypeName *_ptr) { (func) (_ptr); } \
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G_GNUC_END_IGNORE_DEPRECATIONS
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#define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none) \
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
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static inline void _GLIB_AUTO_FUNC_NAME(TypeName) (TypeName *_ptr) { if (*_ptr != none) (func) (*_ptr); } \
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G_GNUC_END_IGNORE_DEPRECATIONS
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#define g_autoptr(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_TYPENAME(TypeName)
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#define g_auto(TypeName) _GLIB_CLEANUP(_GLIB_AUTO_FUNC_NAME(TypeName)) TypeName
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#define g_autofree _GLIB_CLEANUP(g_autoptr_cleanup_generic_gfree)
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#else /* not GNU C */
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/* this (dummy) macro is private */
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#define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName)
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/* these (dummy) macros are API */
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#define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func)
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#define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func)
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#define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none)
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/* no declaration of g_auto() or g_autoptr() here */
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#endif
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#endif /* __G_MACROS_H__ */
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