FreeTDS API: include/freetds/macros.h Source File

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 _tdsguard_dWrEWKe6Aqdq6AyZsaKD0V_
22#define _tdsguard_dWrEWKe6Aqdq6AyZsaKD0V_
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#define TDS_ZERO_FREE(x) do {free((x)); (x) = NULL;} while(0)
33#define TDS_VECTOR_SIZE(x) (sizeof(x)/sizeof(x[0]))
34
35#ifdef offsetof
36#define TDS_OFFSET(type, field) offsetof(type, field)
37#else
38#define TDS_OFFSET(type, field) (((char*)&((type*)0)->field)-((char*)0))
39#endif
40
41#if ENABLE_EXTRA_CHECKS
42# define TDS_EXTRA_CHECK(stmt) stmt
43#else
44# define TDS_EXTRA_CHECK(stmt)
45#endif
46
47# if defined(__llvm__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
48# define TDS_COMPILE_CHECK(name,check) \
49 _Static_assert(check,#name)
50# else
51# define TDS_COMPILE_CHECK(name,check) \
52 typedef char _tds_check_##name[(check)?1:-1] TDS_UNUSED
53# endif
54
55#if defined(__GNUC__) && __GNUC__ >= 3
56# define TDS_LIKELY(x) __builtin_expect(!!(x), 1)
57# define TDS_UNLIKELY(x) __builtin_expect(!!(x), 0)
58#else
59# define TDS_LIKELY(x) (x)
60# define TDS_UNLIKELY(x) (x)
61#endif
62
63#if ENABLE_EXTRA_CHECKS && defined(__GNUC__) && __GNUC__ >= 4
64#define TDS_WUR __attribute__ ((__warn_unused_result__))
65#else
66#define TDS_WUR
67#endif
68
69#if defined(__GNUC__) && __GNUC__ >= 2
70#define TDS_UNUSED __attribute__ ((unused))
71#else
72#define TDS_UNUSED
73#endif
74
75#define TDS_INT2PTR(i) ((void*)(((char*)0)+((ptrdiff_t)(i))))
76#define TDS_PTR2INT(p) ((int)(((char*)(p))-((char*)0)))
77
78#define TDS_MAX(a,b) ( (a) > (b) ? (a) : (b) )
79#define TDS_MIN(a,b) ( (a) < (b) ? (a) : (b) )
80#define TDS_CLAMP(x,a,b) ( (x) < (a) ? (a) : (x) > (b) ? (b) : (x) )
81
82#define tds_new(type, n) ((type *) malloc(sizeof(type) * (n)))
83#define tds_new0(type, n) ((type *) calloc(n, sizeof(type)))
84
85#endif