2 * Copyright © 2012 Ran Benita <ran234@gmail.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
35 #define STATIC_ASSERT(expr, message) do { \
36 switch (0) { case 0: case (expr): ; } \
43 istrcmp(const char *a, const char *b);
46 istrncmp(const char *a, const char *b, size_t n);
49 streq(const char *s1, const char *s2)
51 return strcmp(s1, s2) == 0;
55 streq_not_null(const char *s1, const char *s2)
63 istreq(const char *s1, const char *s2)
65 return istrcmp(s1, s2) == 0;
69 istreq_prefix(const char *s1, const char *s2)
71 return istrncmp(s1, s2, strlen(s1)) == 0;
75 strdup_safe(const char *s)
77 return s ? strdup(s) : NULL;
81 strlen_safe(const char *s)
83 return s ? strlen(s) : 0;
87 isempty(const char *s)
89 return s == NULL || s[0] == '\0';
92 static inline const char *
93 strnull(const char *s)
95 return s ? s : "(null)";
98 static inline const char *
99 strempty(const char *s)
105 memdup(const void *mem, size_t nmemb, size_t size)
107 void *p = calloc(nmemb, size);
109 memcpy(p, mem, nmemb * size);
113 /* ctype.h is locale-dependent and has other oddities. */
117 return ch == ' ' || (ch >= '\t' && ch <= '\r');
123 return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
129 return ch >= '0' && ch <= '9';
135 return is_alpha(ch) || is_digit(ch);
142 (ch >= '0' && ch <= '9') ||
143 (ch >= 'a' && ch <= 'f') ||
144 (ch >= 'A' && ch <= 'F');
150 /* See table in ascii(7). */
151 return ch >= '!' && ch <= '~';
155 * Return the bit position of the most significant bit.
156 * Note: this is 1-based! It's more useful this way, and returns 0 when
159 static inline unsigned
160 msb_pos(uint32_t mask)
171 one_bit_set(uint32_t x)
173 return x && (x & (x - 1)) == 0;
177 map_file(FILE *file, char **string_out, size_t *size_out);
180 unmap_file(char *string, size_t size);
182 #define ARRAY_SIZE(arr) ((sizeof(arr) / sizeof(*(arr))))
184 #define MIN(a, b) ((a) < (b) ? (a) : (b))
185 #define MAX(a, b) ((a) > (b) ? (a) : (b))
187 /* Round up @a so it's divisible by @b. */
188 #define ROUNDUP(a, b) (((a) + (b) - 1) / (b) * (b))
190 #if defined(HAVE_SECURE_GETENV)
191 # define secure_getenv secure_getenv
192 #elif defined(HAVE___SECURE_GETENV)
193 # define secure_getenv __secure_getenv
195 # define secure_getenv getenv
198 #if defined(HAVE___BUILTIN_EXPECT)
199 # define likely(x) __builtin_expect(!!(x), 1)
200 # define unlikely(x) __builtin_expect(!!(x), 0)
202 # define likely(x) (x)
203 # define unlikely(x) (x)
206 /* Compiler Attributes */
208 #if defined(__GNUC__) && (__GNUC__ >= 4) && !defined(__CYGWIN__)
209 # define XKB_EXPORT __attribute__((visibility("default")))
210 #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
211 # define XKB_EXPORT __global
212 #else /* not gcc >= 4 and not Sun Studio >= 8 */
216 #if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 203)
217 # define ATTR_PRINTF(x,y) __attribute__((__format__(__printf__, x, y)))
218 #else /* not gcc >= 2.3 */
219 # define ATTR_PRINTF(x,y)
222 #if (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)) \
223 || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
224 # define ATTR_NORETURN __attribute__((__noreturn__))
226 # define ATTR_NORETURN
229 #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 296)
230 #define ATTR_MALLOC __attribute__((__malloc__))
235 #if defined(__GNUC__) && (__GNUC__ >= 4)
236 # define ATTR_NULL_SENTINEL __attribute__((__sentinel__))
238 # define ATTR_NULL_SENTINEL
239 #endif /* GNUC >= 4 */
241 #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 295)
242 #define ATTR_PACKED __attribute__((__packed__))