1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
3
4 #ifndef FLEX_ARRAY
5 /*
6 * See if our compiler is known to support flexible array members.
7 */
8 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
9 # define FLEX_ARRAY /* empty */
10 #elif defined(__GNUC__)
11 # if (__GNUC__ >= 3)
12 # define FLEX_ARRAY /* empty */
13 # else
14 # define FLEX_ARRAY 0 /* older GNU extension */
15 # endif
16 #endif
17
18 /*
19 * Otherwise, default to safer but a bit wasteful traditional style
20 */
21 #ifndef FLEX_ARRAY
22 # define FLEX_ARRAY 1
23 #endif
24 #endif
25
26 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
27
28 #ifdef __GNUC__
29 #define TYPEOF(x) (__typeof__(x))
30 #else
31 #define TYPEOF(x)
32 #endif
33
34 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
35 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
36
37 /* Approximation of the length of the decimal representation of this type. */
38 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
39
40 #define _ALL_SOURCE 1
41 #define _BSD_SOURCE 1
42 #define HAS_BOOL
43
44 #include <unistd.h>
45 #include <stdio.h>
46 #include <sys/stat.h>
47 #include <sys/statfs.h>
48 #include <fcntl.h>
49 #include <stdbool.h>
50 #include <stddef.h>
51 #include <stdlib.h>
52 #include <stdarg.h>
53 #include <string.h>
54 #include <errno.h>
55 #include <limits.h>
56 #include <sys/param.h>
57 #include <sys/types.h>
58 #include <dirent.h>
59 #include <sys/time.h>
60 #include <time.h>
61 #include <signal.h>
62 #include <fnmatch.h>
63 #include <assert.h>
64 #include <regex.h>
65 #include <utime.h>
66 #include <sys/wait.h>
67 #include <sys/poll.h>
68 #include <sys/socket.h>
69 #include <sys/ioctl.h>
70 #include <inttypes.h>
71 #include <linux/magic.h>
72 #include "types.h"
73 #include <sys/ttydefaults.h>
74 #include <lk/debugfs.h>
75
76 extern const char *graph_line;
77 extern const char *graph_dotted_line;
78 extern char buildid_dir[];
79 extern char tracing_events_path[];
80 extern void perf_debugfs_set_path(const char *mountpoint);
81 const char *perf_debugfs_mount(const char *mountpoint);
82
83 /* On most systems <limits.h> would have given us this, but
84 * not on some systems (e.g. GNU/Hurd).
85 */
86 #ifndef PATH_MAX
87 #define PATH_MAX 4096
88 #endif
89
90 #ifndef PRIuMAX
91 #define PRIuMAX "llu"
92 #endif
93
94 #ifndef PRIu32
95 #define PRIu32 "u"
96 #endif
97
98 #ifndef PRIx32
99 #define PRIx32 "x"
100 #endif
101
102 #ifndef PATH_SEP
103 #define PATH_SEP ':'
104 #endif
105
106 #ifndef STRIP_EXTENSION
107 #define STRIP_EXTENSION ""
108 #endif
109
110 #ifndef has_dos_drive_prefix
111 #define has_dos_drive_prefix(path) 0
112 #endif
113
114 #ifndef is_dir_sep
115 #define is_dir_sep(c) ((c) == '/')
116 #endif
117
118 #ifdef __GNUC__
119 #define NORETURN __attribute__((__noreturn__))
120 #else
121 #define NORETURN
122 #ifndef __attribute__
123 #define __attribute__(x)
124 #endif
125 #endif
126
127 /* General helper functions */
128 extern void usage(const char *err) NORETURN;
129 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
130 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
131 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
132
133 #include "../../../include/linux/stringify.h"
134
135 #define DIE_IF(cnd) \
136 do { if (cnd) \
137 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
138 __stringify(cnd) "\n"); \
139 } while (0)
140
141
142 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
143
144 extern int prefixcmp(const char *str, const char *prefix);
145 extern void set_buildid_dir(void);
146 extern void disable_buildid_cache(void);
147
skip_prefix(const char * str,const char * prefix)148 static inline const char *skip_prefix(const char *str, const char *prefix)
149 {
150 size_t len = strlen(prefix);
151 return strncmp(str, prefix, len) ? NULL : str + len;
152 }
153
154 #ifdef __GLIBC_PREREQ
155 #if __GLIBC_PREREQ(2, 1)
156 #define HAVE_STRCHRNUL
157 #endif
158 #endif
159
160 #ifndef HAVE_STRCHRNUL
161 #define strchrnul gitstrchrnul
gitstrchrnul(const char * s,int c)162 static inline char *gitstrchrnul(const char *s, int c)
163 {
164 while (*s && *s != c)
165 s++;
166 return (char *)s;
167 }
168 #endif
169
170 /*
171 * Wrappers:
172 */
173 extern char *xstrdup(const char *str);
174 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
175
176
zalloc(size_t size)177 static inline void *zalloc(size_t size)
178 {
179 return calloc(1, size);
180 }
181
has_extension(const char * filename,const char * ext)182 static inline int has_extension(const char *filename, const char *ext)
183 {
184 size_t len = strlen(filename);
185 size_t extlen = strlen(ext);
186
187 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
188 }
189
190 /* Sane ctype - no locale, and works with signed chars */
191 #undef isascii
192 #undef isspace
193 #undef isdigit
194 #undef isxdigit
195 #undef isalpha
196 #undef isprint
197 #undef isalnum
198 #undef islower
199 #undef isupper
200 #undef tolower
201 #undef toupper
202
203 #ifndef NSEC_PER_MSEC
204 #define NSEC_PER_MSEC 1000000L
205 #endif
206
207 extern unsigned char sane_ctype[256];
208 #define GIT_SPACE 0x01
209 #define GIT_DIGIT 0x02
210 #define GIT_ALPHA 0x04
211 #define GIT_GLOB_SPECIAL 0x08
212 #define GIT_REGEX_SPECIAL 0x10
213 #define GIT_PRINT_EXTRA 0x20
214 #define GIT_PRINT 0x3E
215 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
216 #define isascii(x) (((x) & ~0x7f) == 0)
217 #define isspace(x) sane_istest(x,GIT_SPACE)
218 #define isdigit(x) sane_istest(x,GIT_DIGIT)
219 #define isxdigit(x) \
220 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
221 #define isalpha(x) sane_istest(x,GIT_ALPHA)
222 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
223 #define isprint(x) sane_istest(x,GIT_PRINT)
224 #define islower(x) (sane_istest(x,GIT_ALPHA) && sane_istest(x,0x20))
225 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !sane_istest(x,0x20))
226 #define tolower(x) sane_case((unsigned char)(x), 0x20)
227 #define toupper(x) sane_case((unsigned char)(x), 0)
228
sane_case(int x,int high)229 static inline int sane_case(int x, int high)
230 {
231 if (sane_istest(x, GIT_ALPHA))
232 x = (x & ~0x20) | high;
233 return x;
234 }
235
236 int mkdir_p(char *path, mode_t mode);
237 int copyfile(const char *from, const char *to);
238
239 s64 perf_atoll(const char *str);
240 char **argv_split(const char *str, int *argcp);
241 void argv_free(char **argv);
242 bool strglobmatch(const char *str, const char *pat);
243 bool strlazymatch(const char *str, const char *pat);
244 int strtailcmp(const char *s1, const char *s2);
245 char *strxfrchar(char *s, char from, char to);
246 unsigned long convert_unit(unsigned long value, char *unit);
247 int readn(int fd, void *buf, size_t size);
248
249 struct perf_event_attr;
250
251 void event_attr_init(struct perf_event_attr *attr);
252
253 #define _STR(x) #x
254 #define STR(x) _STR(x)
255
256 /*
257 * Determine whether some value is a power of two, where zero is
258 * *not* considered a power of two.
259 */
260
261 static inline __attribute__((const))
is_power_of_2(unsigned long n)262 bool is_power_of_2(unsigned long n)
263 {
264 return (n != 0 && ((n & (n - 1)) == 0));
265 }
266
267 size_t hex_width(u64 v);
268 int hex2u64(const char *ptr, u64 *val);
269
270 char *ltrim(char *s);
271 char *rtrim(char *s);
272
273 void dump_stack(void);
274
275 extern unsigned int page_size;
276
277 struct winsize;
278 void get_term_dimensions(struct winsize *ws);
279 #endif /* GIT_COMPAT_UTIL_H */
280