2 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
30 #define va_copy __va_copy
32 #define va_copy(dst, src) ((dst) = (src))
37 /* Build-time assertion building block. */
38 #define BUILD_ASSERT__(EXPR) \
39 sizeof(struct { unsigned int build_assert_failed : (EXPR) ? 1 : -1; })
41 /* Build-time assertion for use in a statement context. */
42 #define BUILD_ASSERT(EXPR) (void) BUILD_ASSERT__(EXPR)
44 /* Build-time assertion for use in a declaration context. */
45 #define BUILD_ASSERT_DECL(EXPR) \
46 extern int (*build_assert(void))[BUILD_ASSERT__(EXPR)]
47 #else /* __cplusplus */
48 #include <boost/static_assert.hpp>
49 #define BUILD_ASSERT BOOST_STATIC_ASSERT
50 #define BUILD_ASSERT_DECL BOOST_STATIC_ASSERT
51 #endif /* __cplusplus */
53 extern const char *program_name;
55 /* Returns the number of elements in ARRAY. */
56 #define ARRAY_SIZE(ARRAY) (sizeof ARRAY / sizeof *ARRAY)
58 /* Returns X / Y, rounding up. X must be nonnegative to round correctly. */
59 #define DIV_ROUND_UP(X, Y) (((X) + ((Y) - 1)) / (Y))
61 /* Returns X rounded up to the nearest multiple of Y. */
62 #define ROUND_UP(X, Y) (DIV_ROUND_UP(X, Y) * (Y))
64 /* Returns X rounded down to the nearest multiple of Y. */
65 #define ROUND_DOWN(X, Y) ((X) / (Y) * (Y))
67 /* Returns true if X is a power of 2, otherwise false. */
68 #define IS_POW2(X) ((X) && !((X) & ((X) - 1)))
71 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
75 #define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
78 #define NOT_REACHED() abort()
80 /* Given POINTER, the address of the given MEMBER in a STRUCT object, returns
82 #define CONTAINER_OF(POINTER, STRUCT, MEMBER) \
83 ((STRUCT *) (void *) ((char *) (POINTER) - offsetof (STRUCT, MEMBER)))
89 void set_program_name(const char *);
91 void ovs_print_version(char *date, char *time,
92 uint8_t min_ofp, uint8_t max_ofp);
93 #define OVS_PRINT_VERSION(min_ofp, max_ofp) \
94 ovs_print_version(__DATE__, __TIME__, (min_ofp), (max_ofp))
96 void out_of_memory(void) NO_RETURN;
97 void *xmalloc(size_t) MALLOC_LIKE;
98 void *xcalloc(size_t, size_t) MALLOC_LIKE;
99 void *xzalloc(size_t) MALLOC_LIKE;
100 void *xrealloc(void *, size_t);
101 void *xmemdup(const void *, size_t) MALLOC_LIKE;
102 char *xmemdup0(const char *, size_t) MALLOC_LIKE;
103 char *xstrdup(const char *) MALLOC_LIKE;
104 char *xasprintf(const char *format, ...) PRINTF_FORMAT(1, 2) MALLOC_LIKE;
105 char *xvasprintf(const char *format, va_list) PRINTF_FORMAT(1, 0) MALLOC_LIKE;
106 void *x2nrealloc(void *p, size_t *n, size_t s);
108 void ovs_strlcpy(char *dst, const char *src, size_t size);
110 void ovs_fatal(int err_no, const char *format, ...)
111 PRINTF_FORMAT(2, 3) NO_RETURN;
112 void ovs_error(int err_no, const char *format, ...) PRINTF_FORMAT(2, 3);
113 void ovs_hex_dump(FILE *, const void *, size_t, uintptr_t offset, bool ascii);
115 bool str_to_int(const char *, int base, int *);
116 bool str_to_long(const char *, int base, long *);
117 bool str_to_llong(const char *, int base, long long *);
118 bool str_to_uint(const char *, int base, unsigned int *);
119 bool str_to_ulong(const char *, int base, unsigned long *);
120 bool str_to_ullong(const char *, int base, unsigned long long *);
122 bool str_to_double(const char *, double *);
124 int hexit_value(int c);
127 char *dir_name(const char *file_name);
128 char *abs_file_name(const char *dir, const char *file_name);
130 void ignore(bool x OVS_UNUSED);