FreeTDS API

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macros.h
1/* FreeTDS - Library of routines accessing Sybase and Microsoft databases
2 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Brian Bruns
3 * Copyright (C) 2010-2017 Frediano Ziglio
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
19 */
20
21#ifndef _freetds_macros_h_
22#define _freetds_macros_h_
23
24#ifndef _freetds_config_h_
25#error should include config.h before
26#endif
27
28#if HAVE_STDDEF_H
29#include <stddef.h>
30#endif /* HAVE_STDDEF_H */
31
32#include "tds_sysdep_public.h"
33#include <freetds/sysdep_types.h>
34
35#define TDS_ZERO_FREE(x) do {free((x)); (x) = NULL;} while(0)
36#define TDS_VECTOR_SIZE(x) (sizeof(x)/sizeof(x[0]))
37
38#ifdef offsetof
39#define TDS_OFFSET(type, field) offsetof(type, field)
40#else
41#define TDS_OFFSET(type, field) (((char*)&((type*)0)->field)-((char*)0))
42#endif
43
44#if ENABLE_EXTRA_CHECKS
45# if defined(__llvm__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
46# define TDS_COMPILE_CHECK(name,check) \
47 _Static_assert(check,#name)
48# elif defined(__GNUC__) && __GNUC__ >= 2
49# define TDS_COMPILE_CHECK(name,check) \
50 extern int name[(check)?1:-1] __attribute__ ((unused))
51# else
52# define TDS_COMPILE_CHECK(name,check) \
53 extern int name[(check)?1:-1]
54# endif
55# define TDS_EXTRA_CHECK(stmt) stmt
56#else
57# define TDS_COMPILE_CHECK(name,check) \
58 extern int disabled_check_##name
59# define TDS_EXTRA_CHECK(stmt)
60#endif
61
62#if defined(__GNUC__) && __GNUC__ >= 3
63# define TDS_LIKELY(x) __builtin_expect(!!(x), 1)
64# define TDS_UNLIKELY(x) __builtin_expect(!!(x), 0)
65#else
66# define TDS_LIKELY(x) (x)
67# define TDS_UNLIKELY(x) (x)
68#endif
69
70#if ENABLE_EXTRA_CHECKS && defined(__GNUC__) && __GNUC__ >= 4
71#define TDS_WUR __attribute__ ((__warn_unused_result__))
72#else
73#define TDS_WUR
74#endif
75
76#define TDS_INT2PTR(i) ((void*)(((char*)0)+((TDS_INTPTR)(i))))
77#define TDS_PTR2INT(p) ((int)(((char*)(p))-((char*)0)))
78
79#endif