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)
42 /* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
43 #define _DEFAULT_SOURCE 1
49 #include <sys/statfs.h>
58 #include <sys/param.h>
59 #include <sys/types.h>
70 #include <sys/socket.h>
71 #include <sys/ioctl.h>
73 #include <linux/magic.h>
75 #include <sys/ttydefaults.h>
76 #include <api/fs/debugfs.h>
78 #include <linux/bitops.h>
80 extern const char *graph_line;
81 extern const char *graph_dotted_line;
82 extern char buildid_dir[];
83 extern char tracing_events_path[];
84 extern void perf_debugfs_set_path(const char *mountpoint);
85 const char *perf_debugfs_mount(const char *mountpoint);
86 const char *find_tracing_dir(void);
87 char *get_tracing_file(const char *name);
88 void put_tracing_file(char *file);
90 /* On most systems <limits.h> would have given us this, but
91 * not on some systems (e.g. GNU/Hurd).
113 #ifndef STRIP_EXTENSION
114 #define STRIP_EXTENSION ""
117 #ifndef has_dos_drive_prefix
118 #define has_dos_drive_prefix(path) 0
122 #define is_dir_sep(c) ((c) == '/')
126 #define NORETURN __attribute__((__noreturn__))
129 #ifndef __attribute__
130 #define __attribute__(x)
134 #define PERF_GTK_DSO "libperf-gtk.so"
136 /* General helper functions */
137 extern void usage(const char *err) NORETURN;
138 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
139 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
140 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
142 #include "../../../include/linux/stringify.h"
144 #define DIE_IF(cnd) \
146 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
147 __stringify(cnd) "\n"); \
151 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
153 extern int prefixcmp(const char *str, const char *prefix);
154 extern void set_buildid_dir(void);
155 extern void disable_buildid_cache(void);
157 static inline const char *skip_prefix(const char *str, const char *prefix)
159 size_t len = strlen(prefix);
160 return strncmp(str, prefix, len) ? NULL : str + len;
163 #ifdef __GLIBC_PREREQ
164 #if __GLIBC_PREREQ(2, 1)
165 #define HAVE_STRCHRNUL
169 #ifndef HAVE_STRCHRNUL
170 #define strchrnul gitstrchrnul
171 static inline char *gitstrchrnul(const char *s, int c)
173 while (*s && *s != c)
182 extern char *xstrdup(const char *str);
183 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
186 static inline void *zalloc(size_t size)
188 return calloc(1, size);
191 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
193 static inline int has_extension(const char *filename, const char *ext)
195 size_t len = strlen(filename);
196 size_t extlen = strlen(ext);
198 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
201 /* Sane ctype - no locale, and works with signed chars */
214 #ifndef NSEC_PER_MSEC
215 #define NSEC_PER_MSEC 1000000L
218 int parse_nsec_time(const char *str, u64 *ptime);
220 extern unsigned char sane_ctype[256];
221 #define GIT_SPACE 0x01
222 #define GIT_DIGIT 0x02
223 #define GIT_ALPHA 0x04
224 #define GIT_GLOB_SPECIAL 0x08
225 #define GIT_REGEX_SPECIAL 0x10
226 #define GIT_PRINT_EXTRA 0x20
227 #define GIT_PRINT 0x3E
228 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
229 #define isascii(x) (((x) & ~0x7f) == 0)
230 #define isspace(x) sane_istest(x,GIT_SPACE)
231 #define isdigit(x) sane_istest(x,GIT_DIGIT)
232 #define isxdigit(x) \
233 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
234 #define isalpha(x) sane_istest(x,GIT_ALPHA)
235 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
236 #define isprint(x) sane_istest(x,GIT_PRINT)
237 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
238 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
239 #define tolower(x) sane_case((unsigned char)(x), 0x20)
240 #define toupper(x) sane_case((unsigned char)(x), 0)
242 static inline int sane_case(int x, int high)
244 if (sane_istest(x, GIT_ALPHA))
245 x = (x & ~0x20) | high;
249 int mkdir_p(char *path, mode_t mode);
250 int copyfile(const char *from, const char *to);
251 int copyfile_mode(const char *from, const char *to, mode_t mode);
253 s64 perf_atoll(const char *str);
254 char **argv_split(const char *str, int *argcp);
255 void argv_free(char **argv);
256 bool strglobmatch(const char *str, const char *pat);
257 bool strlazymatch(const char *str, const char *pat);
258 int strtailcmp(const char *s1, const char *s2);
259 char *strxfrchar(char *s, char from, char to);
260 unsigned long convert_unit(unsigned long value, char *unit);
261 ssize_t readn(int fd, void *buf, size_t n);
262 ssize_t writen(int fd, void *buf, size_t n);
264 struct perf_event_attr;
266 void event_attr_init(struct perf_event_attr *attr);
269 #define STR(x) _STR(x)
272 * Determine whether some value is a power of two, where zero is
273 * *not* considered a power of two.
276 static inline __attribute__((const))
277 bool is_power_of_2(unsigned long n)
279 return (n != 0 && ((n & (n - 1)) == 0));
282 static inline unsigned next_pow2(unsigned x)
286 return 1ULL << (32 - __builtin_clz(x - 1));
289 static inline unsigned long next_pow2_l(unsigned long x)
291 #if BITS_PER_LONG == 64
292 if (x <= (1UL << 31))
294 return (unsigned long)next_pow2(x >> 32) << 32;
300 size_t hex_width(u64 v);
301 int hex2u64(const char *ptr, u64 *val);
303 char *ltrim(char *s);
304 char *rtrim(char *s);
306 void dump_stack(void);
308 extern unsigned int page_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")
323 char *get_srcline(struct dso *dso, unsigned long addr);
324 void free_srcline(char *srcline);
326 int filename__read_int(const char *filename, int *value);
327 int filename__read_str(const char *filename, char **buf, size_t *sizep);
328 int perf_event_paranoid(void);
330 void mem_bswap_64(void *src, int byte_size);
331 void mem_bswap_32(void *src, int byte_size);
333 const char *get_filename_for_perf_kvm(void);
334 #endif /* GIT_COMPAT_UTIL_H */