tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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/* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
43#define _DEFAULT_SOURCE 1
44#define HAS_BOOL
45
46#include <unistd.h>
47#include <stdio.h>
48#include <sys/stat.h>
49#include <sys/statfs.h>
50#include <fcntl.h>
51#include <stdbool.h>
52#include <stddef.h>
53#include <stdlib.h>
54#include <stdarg.h>
55#include <string.h>
56#include <errno.h>
57#include <limits.h>
58#include <sys/param.h>
59#include <sys/types.h>
60#include <dirent.h>
61#include <sys/time.h>
62#include <time.h>
63#include <signal.h>
64#include <fnmatch.h>
65#include <assert.h>
66#include <regex.h>
67#include <utime.h>
68#include <sys/wait.h>
69#include <poll.h>
70#include <sys/socket.h>
71#include <sys/ioctl.h>
72#include <inttypes.h>
73#include <linux/kernel.h>
74#include <linux/magic.h>
75#include <linux/types.h>
76#include <sys/ttydefaults.h>
77#include <api/fs/debugfs.h>
78#include <termios.h>
79#include <linux/bitops.h>
80#include <termios.h>
81
82extern const char *graph_line;
83extern const char *graph_dotted_line;
84extern char buildid_dir[];
85extern char tracing_events_path[];
86extern void perf_debugfs_set_path(const char *mountpoint);
87const char *perf_debugfs_mount(const char *mountpoint);
88const char *find_tracing_dir(void);
89char *get_tracing_file(const char *name);
90void put_tracing_file(char *file);
91
92/* On most systems <limits.h> would have given us this, but
93 * not on some systems (e.g. GNU/Hurd).
94 */
95#ifndef PATH_MAX
96#define PATH_MAX 4096
97#endif
98
99#ifndef PRIuMAX
100#define PRIuMAX "llu"
101#endif
102
103#ifndef PRIu32
104#define PRIu32 "u"
105#endif
106
107#ifndef PRIx32
108#define PRIx32 "x"
109#endif
110
111#ifndef PATH_SEP
112#define PATH_SEP ':'
113#endif
114
115#ifndef STRIP_EXTENSION
116#define STRIP_EXTENSION ""
117#endif
118
119#ifndef has_dos_drive_prefix
120#define has_dos_drive_prefix(path) 0
121#endif
122
123#ifndef is_dir_sep
124#define is_dir_sep(c) ((c) == '/')
125#endif
126
127#ifdef __GNUC__
128#define NORETURN __attribute__((__noreturn__))
129#else
130#define NORETURN
131#ifndef __attribute__
132#define __attribute__(x)
133#endif
134#endif
135
136#define PERF_GTK_DSO "libperf-gtk.so"
137
138/* General helper functions */
139extern void usage(const char *err) NORETURN;
140extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
141extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
142extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
143
144#include "../../../include/linux/stringify.h"
145
146#define DIE_IF(cnd) \
147 do { if (cnd) \
148 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
149 __stringify(cnd) "\n"); \
150 } while (0)
151
152
153extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
154
155extern int prefixcmp(const char *str, const char *prefix);
156extern void set_buildid_dir(void);
157extern void disable_buildid_cache(void);
158
159static inline const char *skip_prefix(const char *str, const char *prefix)
160{
161 size_t len = strlen(prefix);
162 return strncmp(str, prefix, len) ? NULL : str + len;
163}
164
165#ifdef __GLIBC_PREREQ
166#if __GLIBC_PREREQ(2, 1)
167#define HAVE_STRCHRNUL
168#endif
169#endif
170
171#ifndef HAVE_STRCHRNUL
172#define strchrnul gitstrchrnul
173static inline char *gitstrchrnul(const char *s, int c)
174{
175 while (*s && *s != c)
176 s++;
177 return (char *)s;
178}
179#endif
180
181/*
182 * Wrappers:
183 */
184extern char *xstrdup(const char *str);
185extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
186
187
188static inline void *zalloc(size_t size)
189{
190 return calloc(1, size);
191}
192
193#define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
194
195static inline int has_extension(const char *filename, const char *ext)
196{
197 size_t len = strlen(filename);
198 size_t extlen = strlen(ext);
199
200 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
201}
202
203/* Sane ctype - no locale, and works with signed chars */
204#undef isascii
205#undef isspace
206#undef isdigit
207#undef isxdigit
208#undef isalpha
209#undef isprint
210#undef isalnum
211#undef islower
212#undef isupper
213#undef tolower
214#undef toupper
215
216#ifndef NSEC_PER_MSEC
217#define NSEC_PER_MSEC 1000000L
218#endif
219
220int parse_nsec_time(const char *str, u64 *ptime);
221
222extern unsigned char sane_ctype[256];
223#define GIT_SPACE 0x01
224#define GIT_DIGIT 0x02
225#define GIT_ALPHA 0x04
226#define GIT_GLOB_SPECIAL 0x08
227#define GIT_REGEX_SPECIAL 0x10
228#define GIT_PRINT_EXTRA 0x20
229#define GIT_PRINT 0x3E
230#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
231#define isascii(x) (((x) & ~0x7f) == 0)
232#define isspace(x) sane_istest(x,GIT_SPACE)
233#define isdigit(x) sane_istest(x,GIT_DIGIT)
234#define isxdigit(x) \
235 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
236#define isalpha(x) sane_istest(x,GIT_ALPHA)
237#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
238#define isprint(x) sane_istest(x,GIT_PRINT)
239#define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
240#define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
241#define tolower(x) sane_case((unsigned char)(x), 0x20)
242#define toupper(x) sane_case((unsigned char)(x), 0)
243
244static inline int sane_case(int x, int high)
245{
246 if (sane_istest(x, GIT_ALPHA))
247 x = (x & ~0x20) | high;
248 return x;
249}
250
251int mkdir_p(char *path, mode_t mode);
252int copyfile(const char *from, const char *to);
253int copyfile_mode(const char *from, const char *to, mode_t mode);
254
255s64 perf_atoll(const char *str);
256char **argv_split(const char *str, int *argcp);
257void argv_free(char **argv);
258bool strglobmatch(const char *str, const char *pat);
259bool strlazymatch(const char *str, const char *pat);
260int strtailcmp(const char *s1, const char *s2);
261char *strxfrchar(char *s, char from, char to);
262unsigned long convert_unit(unsigned long value, char *unit);
263ssize_t readn(int fd, void *buf, size_t n);
264ssize_t writen(int fd, void *buf, size_t n);
265
266struct perf_event_attr;
267
268void event_attr_init(struct perf_event_attr *attr);
269
270#define _STR(x) #x
271#define STR(x) _STR(x)
272
273/*
274 * Determine whether some value is a power of two, where zero is
275 * *not* considered a power of two.
276 */
277
278static inline __attribute__((const))
279bool is_power_of_2(unsigned long n)
280{
281 return (n != 0 && ((n & (n - 1)) == 0));
282}
283
284static inline unsigned next_pow2(unsigned x)
285{
286 if (!x)
287 return 1;
288 return 1ULL << (32 - __builtin_clz(x - 1));
289}
290
291static inline unsigned long next_pow2_l(unsigned long x)
292{
293#if BITS_PER_LONG == 64
294 if (x <= (1UL << 31))
295 return next_pow2(x);
296 return (unsigned long)next_pow2(x >> 32) << 32;
297#else
298 return next_pow2(x);
299#endif
300}
301
302size_t hex_width(u64 v);
303int hex2u64(const char *ptr, u64 *val);
304
305char *ltrim(char *s);
306char *rtrim(char *s);
307
308void dump_stack(void);
309
310extern unsigned int page_size;
311extern int cacheline_size;
312
313void get_term_dimensions(struct winsize *ws);
314void set_term_quiet_input(struct termios *old);
315
316struct parse_tag {
317 char tag;
318 int mult;
319};
320
321unsigned long parse_tag_value(const char *str, struct parse_tag *tags);
322
323#define SRCLINE_UNKNOWN ((char *) "??:0")
324
325static inline int path__join(char *bf, size_t size,
326 const char *path1, const char *path2)
327{
328 return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
329}
330
331static inline int path__join3(char *bf, size_t size,
332 const char *path1, const char *path2,
333 const char *path3)
334{
335 return scnprintf(bf, size, "%s%s%s%s%s",
336 path1, path1[0] ? "/" : "",
337 path2, path2[0] ? "/" : "", path3);
338}
339
340struct dso;
341
342char *get_srcline(struct dso *dso, unsigned long addr);
343void free_srcline(char *srcline);
344
345int filename__read_int(const char *filename, int *value);
346int filename__read_str(const char *filename, char **buf, size_t *sizep);
347int perf_event_paranoid(void);
348
349void mem_bswap_64(void *src, int byte_size);
350void mem_bswap_32(void *src, int byte_size);
351
352const char *get_filename_for_perf_kvm(void);
353bool find_process(const char *name);
354#endif /* GIT_COMPAT_UTIL_H */