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 #include <termios.h>
76
77 extern const char *graph_line;
78 extern const char *graph_dotted_line;
79 extern char buildid_dir[];
80 extern char tracing_events_path[];
81 extern void perf_debugfs_set_path(const char *mountpoint);
82 const char *perf_debugfs_mount(const char *mountpoint);
83 const char *find_tracing_dir(void);
84 char *get_tracing_file(const char *name);
85 void put_tracing_file(char *file);
86
87 /* On most systems <limits.h> would have given us this, but
88 * not on some systems (e.g. GNU/Hurd).
89 */
90 #ifndef PATH_MAX
91 #define PATH_MAX 4096
92 #endif
93
94 #ifndef PRIuMAX
95 #define PRIuMAX "llu"
96 #endif
97
98 #ifndef PRIu32
99 #define PRIu32 "u"
100 #endif
101
102 #ifndef PRIx32
103 #define PRIx32 "x"
104 #endif
105
106 #ifndef PATH_SEP
107 #define PATH_SEP ':'
108 #endif
109
110 #ifndef STRIP_EXTENSION
111 #define STRIP_EXTENSION ""
112 #endif
113
114 #ifndef has_dos_drive_prefix
115 #define has_dos_drive_prefix(path) 0
116 #endif
117
118 #ifndef is_dir_sep
119 #define is_dir_sep(c) ((c) == '/')
120 #endif
121
122 #ifdef __GNUC__
123 #define NORETURN __attribute__((__noreturn__))
124 #else
125 #define NORETURN
126 #ifndef __attribute__
127 #define __attribute__(x)
128 #endif
129 #endif
130
131 /* General helper functions */
132 extern void usage(const char *err) NORETURN;
133 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
134 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
135 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
136
137 #include "../../../include/linux/stringify.h"
138
139 #define DIE_IF(cnd) \
140 do { if (cnd) \
141 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
142 __stringify(cnd) "\n"); \
143 } while (0)
144
145
146 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
147
148 extern int prefixcmp(const char *str, const char *prefix);
149 extern void set_buildid_dir(void);
150 extern void disable_buildid_cache(void);
151
skip_prefix(const char * str,const char * prefix)152 static inline const char *skip_prefix(const char *str, const char *prefix)
153 {
154 size_t len = strlen(prefix);
155 return strncmp(str, prefix, len) ? NULL : str + len;
156 }
157
158 #ifdef __GLIBC_PREREQ
159 #if __GLIBC_PREREQ(2, 1)
160 #define HAVE_STRCHRNUL
161 #endif
162 #endif
163
164 #ifndef HAVE_STRCHRNUL
165 #define strchrnul gitstrchrnul
gitstrchrnul(const char * s,int c)166 static inline char *gitstrchrnul(const char *s, int c)
167 {
168 while (*s && *s != c)
169 s++;
170 return (char *)s;
171 }
172 #endif
173
174 /*
175 * Wrappers:
176 */
177 extern char *xstrdup(const char *str);
178 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
179
180
zalloc(size_t size)181 static inline void *zalloc(size_t size)
182 {
183 return calloc(1, size);
184 }
185
has_extension(const char * filename,const char * ext)186 static inline int has_extension(const char *filename, const char *ext)
187 {
188 size_t len = strlen(filename);
189 size_t extlen = strlen(ext);
190
191 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
192 }
193
194 /* Sane ctype - no locale, and works with signed chars */
195 #undef isascii
196 #undef isspace
197 #undef isdigit
198 #undef isxdigit
199 #undef isalpha
200 #undef isprint
201 #undef isalnum
202 #undef islower
203 #undef isupper
204 #undef tolower
205 #undef toupper
206
207 #ifndef NSEC_PER_MSEC
208 #define NSEC_PER_MSEC 1000000L
209 #endif
210
211 int parse_nsec_time(const char *str, u64 *ptime);
212
213 extern unsigned char sane_ctype[256];
214 #define GIT_SPACE 0x01
215 #define GIT_DIGIT 0x02
216 #define GIT_ALPHA 0x04
217 #define GIT_GLOB_SPECIAL 0x08
218 #define GIT_REGEX_SPECIAL 0x10
219 #define GIT_PRINT_EXTRA 0x20
220 #define GIT_PRINT 0x3E
221 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
222 #define isascii(x) (((x) & ~0x7f) == 0)
223 #define isspace(x) sane_istest(x,GIT_SPACE)
224 #define isdigit(x) sane_istest(x,GIT_DIGIT)
225 #define isxdigit(x) \
226 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
227 #define isalpha(x) sane_istest(x,GIT_ALPHA)
228 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
229 #define isprint(x) sane_istest(x,GIT_PRINT)
230 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
231 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
232 #define tolower(x) sane_case((unsigned char)(x), 0x20)
233 #define toupper(x) sane_case((unsigned char)(x), 0)
234
sane_case(int x,int high)235 static inline int sane_case(int x, int high)
236 {
237 if (sane_istest(x, GIT_ALPHA))
238 x = (x & ~0x20) | high;
239 return x;
240 }
241
242 int mkdir_p(char *path, mode_t mode);
243 int copyfile(const char *from, const char *to);
244
245 s64 perf_atoll(const char *str);
246 char **argv_split(const char *str, int *argcp);
247 void argv_free(char **argv);
248 bool strglobmatch(const char *str, const char *pat);
249 bool strlazymatch(const char *str, const char *pat);
250 int strtailcmp(const char *s1, const char *s2);
251 char *strxfrchar(char *s, char from, char to);
252 unsigned long convert_unit(unsigned long value, char *unit);
253 int readn(int fd, void *buf, size_t size);
254
255 struct perf_event_attr;
256
257 void event_attr_init(struct perf_event_attr *attr);
258
259 #define _STR(x) #x
260 #define STR(x) _STR(x)
261
262 /*
263 * Determine whether some value is a power of two, where zero is
264 * *not* considered a power of two.
265 */
266
267 static inline __attribute__((const))
is_power_of_2(unsigned long n)268 bool is_power_of_2(unsigned long n)
269 {
270 return (n != 0 && ((n & (n - 1)) == 0));
271 }
272
273 size_t hex_width(u64 v);
274 int hex2u64(const char *ptr, u64 *val);
275
276 char *ltrim(char *s);
277 char *rtrim(char *s);
278
279 void dump_stack(void);
280
281 extern unsigned int page_size;
282
283 void get_term_dimensions(struct winsize *ws);
284 #endif /* GIT_COMPAT_UTIL_H */
285