1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
6 * See if our compiler is known to support flexible array members.
8 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
9 # define FLEX_ARRAY /* empty */
10 #elif defined(__GNUC__)
12 # define FLEX_ARRAY /* empty */
14 # define FLEX_ARRAY 0 /* older GNU extension */
19 * Otherwise, default to safer but a bit wasteful traditional style
26 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
29 #define TYPEOF(x) (__typeof__(x))
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 */
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)
47 #include <sys/statfs.h>
56 #include <sys/param.h>
57 #include <sys/types.h>
68 #include <sys/socket.h>
69 #include <sys/ioctl.h>
71 #include <linux/kernel.h>
72 #include <linux/magic.h>
73 #include <linux/types.h>
74 #include <sys/ttydefaults.h>
75 #include <api/fs/debugfs.h>
77 #include <linux/bitops.h>
79 extern const char *graph_line;
80 extern const char *graph_dotted_line;
81 extern char buildid_dir[];
82 extern char tracing_events_path[];
83 extern void perf_debugfs_set_path(const char *mountpoint);
84 const char *perf_debugfs_mount(const char *mountpoint);
85 const char *find_tracing_dir(void);
86 char *get_tracing_file(const char *name);
87 void put_tracing_file(char *file);
89 /* On most systems <limits.h> would have given us this, but
90 * not on some systems (e.g. GNU/Hurd).
112 #ifndef STRIP_EXTENSION
113 #define STRIP_EXTENSION ""
116 #ifndef has_dos_drive_prefix
117 #define has_dos_drive_prefix(path) 0
121 #define is_dir_sep(c) ((c) == '/')
125 #define NORETURN __attribute__((__noreturn__))
128 #ifndef __attribute__
129 #define __attribute__(x)
133 #define PERF_GTK_DSO "libperf-gtk.so"
135 /* General helper functions */
136 extern void usage(const char *err) NORETURN;
137 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
138 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
139 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
141 #include "../../../include/linux/stringify.h"
143 #define DIE_IF(cnd) \
145 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
146 __stringify(cnd) "\n"); \
150 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
152 extern int prefixcmp(const char *str, const char *prefix);
153 extern void set_buildid_dir(void);
154 extern void disable_buildid_cache(void);
156 static inline const char *skip_prefix(const char *str, const char *prefix)
158 size_t len = strlen(prefix);
159 return strncmp(str, prefix, len) ? NULL : str + len;
162 #ifdef __GLIBC_PREREQ
163 #if __GLIBC_PREREQ(2, 1)
164 #define HAVE_STRCHRNUL
168 #ifndef HAVE_STRCHRNUL
169 #define strchrnul gitstrchrnul
170 static inline char *gitstrchrnul(const char *s, int c)
172 while (*s && *s != c)
181 extern char *xstrdup(const char *str);
182 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
185 static inline void *zalloc(size_t size)
187 return calloc(1, size);
190 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
192 static inline int has_extension(const char *filename, const char *ext)
194 size_t len = strlen(filename);
195 size_t extlen = strlen(ext);
197 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
200 /* Sane ctype - no locale, and works with signed chars */
213 #ifndef NSEC_PER_MSEC
214 #define NSEC_PER_MSEC 1000000L
217 int parse_nsec_time(const char *str, u64 *ptime);
219 extern unsigned char sane_ctype[256];
220 #define GIT_SPACE 0x01
221 #define GIT_DIGIT 0x02
222 #define GIT_ALPHA 0x04
223 #define GIT_GLOB_SPECIAL 0x08
224 #define GIT_REGEX_SPECIAL 0x10
225 #define GIT_PRINT_EXTRA 0x20
226 #define GIT_PRINT 0x3E
227 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
228 #define isascii(x) (((x) & ~0x7f) == 0)
229 #define isspace(x) sane_istest(x,GIT_SPACE)
230 #define isdigit(x) sane_istest(x,GIT_DIGIT)
231 #define isxdigit(x) \
232 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
233 #define isalpha(x) sane_istest(x,GIT_ALPHA)
234 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
235 #define isprint(x) sane_istest(x,GIT_PRINT)
236 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
237 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
238 #define tolower(x) sane_case((unsigned char)(x), 0x20)
239 #define toupper(x) sane_case((unsigned char)(x), 0)
241 static inline int sane_case(int x, int high)
243 if (sane_istest(x, GIT_ALPHA))
244 x = (x & ~0x20) | high;
248 int mkdir_p(char *path, mode_t mode);
249 int copyfile(const char *from, const char *to);
250 int copyfile_mode(const char *from, const char *to, mode_t mode);
252 s64 perf_atoll(const char *str);
253 char **argv_split(const char *str, int *argcp);
254 void argv_free(char **argv);
255 bool strglobmatch(const char *str, const char *pat);
256 bool strlazymatch(const char *str, const char *pat);
257 int strtailcmp(const char *s1, const char *s2);
258 char *strxfrchar(char *s, char from, char to);
259 unsigned long convert_unit(unsigned long value, char *unit);
260 ssize_t readn(int fd, void *buf, size_t n);
261 ssize_t writen(int fd, void *buf, size_t n);
263 struct perf_event_attr;
265 void event_attr_init(struct perf_event_attr *attr);
268 #define STR(x) _STR(x)
271 * Determine whether some value is a power of two, where zero is
272 * *not* considered a power of two.
275 static inline __attribute__((const))
276 bool is_power_of_2(unsigned long n)
278 return (n != 0 && ((n & (n - 1)) == 0));
281 static inline unsigned next_pow2(unsigned x)
285 return 1ULL << (32 - __builtin_clz(x - 1));
288 static inline unsigned long next_pow2_l(unsigned long x)
290 #if BITS_PER_LONG == 64
291 if (x <= (1UL << 31))
293 return (unsigned long)next_pow2(x >> 32) << 32;
299 size_t hex_width(u64 v);
300 int hex2u64(const char *ptr, u64 *val);
302 char *ltrim(char *s);
303 char *rtrim(char *s);
305 void dump_stack(void);
307 extern unsigned int page_size;
308 extern int cacheline_size;
310 void get_term_dimensions(struct winsize *ws);
317 unsigned long parse_tag_value(const char *str, struct parse_tag *tags);
319 #define SRCLINE_UNKNOWN ((char *) "??:0")
321 static inline int path__join(char *bf, size_t size,
322 const char *path1, const char *path2)
324 return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
327 static inline int path__join3(char *bf, size_t size,
328 const char *path1, const char *path2,
331 return scnprintf(bf, size, "%s%s%s%s%s",
332 path1, path1[0] ? "/" : "",
333 path2, path2[0] ? "/" : "", path3);
338 char *get_srcline(struct dso *dso, unsigned long addr);
339 void free_srcline(char *srcline);
341 int filename__read_int(const char *filename, int *value);
342 int filename__read_str(const char *filename, char **buf, size_t *sizep);
343 int perf_event_paranoid(void);
345 void mem_bswap_64(void *src, int byte_size);
346 void mem_bswap_32(void *src, int byte_size);
348 const char *get_filename_for_perf_kvm(void);
349 bool find_process(const char *name);
350 #endif /* GIT_COMPAT_UTIL_H */