libpurple/glibcompat.h

/* pidgin
 *
 * Pidgin is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
 */

#ifndef _GLIBCOMPAT_H_
#define _GLIBCOMPAT_H_
/*
 * SECTION:glibcompat
 * @section_id: libpurple-glibcompat
 * @short_description: <filename>glibcompat.h</filename>
 * @title: GLib version-dependent definitions
 *
 * This file is internal to libpurple. Do not use!
 * Also, any public API should not depend on this file.
 */

#include <glib.h>

#if !GLIB_CHECK_VERSION(2, 36, 0)

#include <errno.h>
#include <fcntl.h>
#ifndef _WIN32
#include <unistd.h>
#endif

static inline gboolean g_close(gint fd, GError **error)
{
	int res;
	int errsv;

	res = close(fd);

	if (G_LIKELY(res == 0))
		return TRUE;
	if (G_UNLIKELY(errno == EINTR))
		return TRUE;

	errsv = errno;
	g_set_error_literal(error, G_FILE_ERROR,
		g_file_error_from_errno(errsv), g_strerror(errsv));
	errno = errsv;

	return FALSE;
}

#endif /* < 2.36.0 */


/* glib's definition of g_stat+GStatBuf seems to be broken on mingw64-w32 (and
 * possibly other 32-bit windows), so instead of relying on it,
 * we'll define our own.
 */
#if defined(_WIN32) && !defined(_MSC_VER) && !defined(_WIN64)
#  include <glib/gstdio.h>
typedef struct _stat GStatBufW32;
static inline int
purple_g_stat(const gchar *filename, GStatBufW32 *buf)
{
	return g_stat(filename, (GStatBuf*)buf);
}
#  define GStatBuf GStatBufW32
#  define g_stat purple_g_stat
#endif


#ifdef __clang__

#undef G_GNUC_BEGIN_IGNORE_DEPRECATIONS
#define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
	_Pragma ("clang diagnostic push") \
	_Pragma ("clang diagnostic ignored \"-Wdeprecated-declarations\"")

#undef G_GNUC_END_IGNORE_DEPRECATIONS
#define G_GNUC_END_IGNORE_DEPRECATIONS \
	_Pragma ("clang diagnostic pop")

#endif /* __clang__ */

/******************************************************************************
 * g_assert_* macros
 *****************************************************************************/
#if !GLIB_CHECK_VERSION(2, 38, 0)
#define g_assert_true(expr)             G_STMT_START { \
                                             if G_LIKELY (expr) ; else \
                                               g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
                                                                    "'" #expr "' should be TRUE"); \
                                        } G_STMT_END
#define g_assert_false(expr)            G_STMT_START { \
                                             if G_LIKELY (!(expr)) ; else \
                                               g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
                                                                    "'" #expr "' should be FALSE"); \
                                        } G_STMT_END
#define g_assert_null(expr)             G_STMT_START { if G_LIKELY ((expr) == NULL) ; else \
                                               g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
                                                                    "'" #expr "' should be NULL"); \
                                        } G_STMT_END
#endif

#if !GLIB_CHECK_VERSION(2, 40, 0)
#define g_assert_nonnull(expr)          G_STMT_START { \
                                             if G_LIKELY ((expr) != NULL) ; else \
                                               g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
                                                                    "'" #expr "' should not be NULL"); \
                                        } G_STMT_END
#endif
                                        
#if !GLIB_CHECK_VERSION(2, 46, 0)
#define g_assert_cmpmem(m1, l1, m2, l2) G_STMT_START {\
                                             gconstpointer __m1 = m1, __m2 = m2; \
                                             int __l1 = l1, __l2 = l2; \
                                             if (__l1 != __l2) \
                                               g_assertion_message_cmpnum (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
                                                                           #l1 " (len(" #m1 ")) == " #l2 " (len(" #m2 "))", __l1, "==", __l2, 'i'); \
                                             else if (memcmp (__m1, __m2, __l1) != 0) \
                                               g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
                                                                    "assertion failed (" #m1 " == " #m2 ")"); \
                                        } G_STMT_END
#endif

#endif /* _GLIBCOMPAT_H_ */