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 82 extern const char *graph_line; 83 extern const char *graph_dotted_line; 84 extern char buildid_dir[]; 85 extern char tracing_events_path[]; 86 extern void perf_debugfs_set_path(const char *mountpoint); 87 const char *perf_debugfs_mount(const char *mountpoint); 88 const char *find_tracing_dir(void); 89 char *get_tracing_file(const char *name); 90 void 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 */ 139 extern void usage(const char *err) NORETURN; 140 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); 141 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); 142 extern 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) 151 152 153 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); 154 155 extern int prefixcmp(const char *str, const char *prefix); 156 extern void set_buildid_dir(void); 157 158 static inline const char *skip_prefix(const char *str, const char *prefix) 159 { 160 size_t len = strlen(prefix); 161 return strncmp(str, prefix, len) ? NULL : str + len; 162 } 163 164 #ifdef __GLIBC_PREREQ 165 #if __GLIBC_PREREQ(2, 1) 166 #define HAVE_STRCHRNUL 167 #endif 168 #endif 169 170 #ifndef HAVE_STRCHRNUL 171 #define strchrnul gitstrchrnul 172 static inline char *gitstrchrnul(const char *s, int c) 173 { 174 while (*s && *s != c) 175 s++; 176 return (char *)s; 177 } 178 #endif 179 180 /* 181 * Wrappers: 182 */ 183 extern char *xstrdup(const char *str); 184 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak)); 185 186 187 static inline void *zalloc(size_t size) 188 { 189 return calloc(1, size); 190 } 191 192 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; }) 193 194 static inline int has_extension(const char *filename, const char *ext) 195 { 196 size_t len = strlen(filename); 197 size_t extlen = strlen(ext); 198 199 return len > extlen && !memcmp(filename + len - extlen, ext, extlen); 200 } 201 202 /* Sane ctype - no locale, and works with signed chars */ 203 #undef isascii 204 #undef isspace 205 #undef isdigit 206 #undef isxdigit 207 #undef isalpha 208 #undef isprint 209 #undef isalnum 210 #undef islower 211 #undef isupper 212 #undef tolower 213 #undef toupper 214 215 #ifndef NSEC_PER_MSEC 216 #define NSEC_PER_MSEC 1000000L 217 #endif 218 219 int parse_nsec_time(const char *str, u64 *ptime); 220 221 extern unsigned char sane_ctype[256]; 222 #define GIT_SPACE 0x01 223 #define GIT_DIGIT 0x02 224 #define GIT_ALPHA 0x04 225 #define GIT_GLOB_SPECIAL 0x08 226 #define GIT_REGEX_SPECIAL 0x10 227 #define GIT_PRINT_EXTRA 0x20 228 #define GIT_PRINT 0x3E 229 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) 230 #define isascii(x) (((x) & ~0x7f) == 0) 231 #define isspace(x) sane_istest(x,GIT_SPACE) 232 #define isdigit(x) sane_istest(x,GIT_DIGIT) 233 #define isxdigit(x) \ 234 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G') 235 #define isalpha(x) sane_istest(x,GIT_ALPHA) 236 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) 237 #define isprint(x) sane_istest(x,GIT_PRINT) 238 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20)) 239 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20)) 240 #define tolower(x) sane_case((unsigned char)(x), 0x20) 241 #define toupper(x) sane_case((unsigned char)(x), 0) 242 243 static inline int sane_case(int x, int high) 244 { 245 if (sane_istest(x, GIT_ALPHA)) 246 x = (x & ~0x20) | high; 247 return x; 248 } 249 250 int mkdir_p(char *path, mode_t mode); 251 int copyfile(const char *from, const char *to); 252 int copyfile_mode(const char *from, const char *to, mode_t mode); 253 254 s64 perf_atoll(const char *str); 255 char **argv_split(const char *str, int *argcp); 256 void argv_free(char **argv); 257 bool strglobmatch(const char *str, const char *pat); 258 bool strlazymatch(const char *str, const char *pat); 259 int strtailcmp(const char *s1, const char *s2); 260 char *strxfrchar(char *s, char from, char to); 261 unsigned long convert_unit(unsigned long value, char *unit); 262 ssize_t readn(int fd, void *buf, size_t n); 263 ssize_t writen(int fd, void *buf, size_t n); 264 265 struct perf_event_attr; 266 267 void event_attr_init(struct perf_event_attr *attr); 268 269 #define _STR(x) #x 270 #define STR(x) _STR(x) 271 272 /* 273 * Determine whether some value is a power of two, where zero is 274 * *not* considered a power of two. 275 */ 276 277 static inline __attribute__((const)) 278 bool is_power_of_2(unsigned long n) 279 { 280 return (n != 0 && ((n & (n - 1)) == 0)); 281 } 282 283 static inline unsigned next_pow2(unsigned x) 284 { 285 if (!x) 286 return 1; 287 return 1ULL << (32 - __builtin_clz(x - 1)); 288 } 289 290 static inline unsigned long next_pow2_l(unsigned long x) 291 { 292 #if BITS_PER_LONG == 64 293 if (x <= (1UL << 31)) 294 return next_pow2(x); 295 return (unsigned long)next_pow2(x >> 32) << 32; 296 #else 297 return next_pow2(x); 298 #endif 299 } 300 301 size_t hex_width(u64 v); 302 int hex2u64(const char *ptr, u64 *val); 303 304 char *ltrim(char *s); 305 char *rtrim(char *s); 306 307 void dump_stack(void); 308 309 extern unsigned int page_size; 310 extern int cacheline_size; 311 312 void get_term_dimensions(struct winsize *ws); 313 void set_term_quiet_input(struct termios *old); 314 315 struct parse_tag { 316 char tag; 317 int mult; 318 }; 319 320 unsigned long parse_tag_value(const char *str, struct parse_tag *tags); 321 322 #define SRCLINE_UNKNOWN ((char *) "??:0") 323 324 static inline int path__join(char *bf, size_t size, 325 const char *path1, const char *path2) 326 { 327 return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2); 328 } 329 330 static inline int path__join3(char *bf, size_t size, 331 const char *path1, const char *path2, 332 const char *path3) 333 { 334 return scnprintf(bf, size, "%s%s%s%s%s", 335 path1, path1[0] ? "/" : "", 336 path2, path2[0] ? "/" : "", path3); 337 } 338 339 struct dso; 340 struct symbol; 341 342 char *get_srcline(struct dso *dso, unsigned long addr, struct symbol *sym, 343 bool show_sym); 344 void free_srcline(char *srcline); 345 346 int filename__read_int(const char *filename, int *value); 347 int filename__read_str(const char *filename, char **buf, size_t *sizep); 348 int perf_event_paranoid(void); 349 350 void mem_bswap_64(void *src, int byte_size); 351 void mem_bswap_32(void *src, int byte_size); 352 353 const char *get_filename_for_perf_kvm(void); 354 bool find_process(const char *name); 355 356 #ifdef HAVE_ZLIB_SUPPORT 357 int gzip_decompress_to_file(const char *input, int output_fd); 358 #endif 359 360 #endif /* GIT_COMPAT_UTIL_H */ 361