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