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 <api/fs/tracefs.h> 79 #include <termios.h> 80 #include <linux/bitops.h> 81 #include <termios.h> 82 83 extern const char *graph_line; 84 extern const char *graph_dotted_line; 85 extern char buildid_dir[]; 86 87 /* On most systems <limits.h> would have given us this, but 88 * not on some systems (e.g. GNU/Hurd). 89 */ 90 #ifndef PATH_MAX 91 #define PATH_MAX 4096 92 #endif 93 94 #ifndef PRIuMAX 95 #define PRIuMAX "llu" 96 #endif 97 98 #ifndef PRIu32 99 #define PRIu32 "u" 100 #endif 101 102 #ifndef PRIx32 103 #define PRIx32 "x" 104 #endif 105 106 #ifndef PATH_SEP 107 #define PATH_SEP ':' 108 #endif 109 110 #ifndef STRIP_EXTENSION 111 #define STRIP_EXTENSION "" 112 #endif 113 114 #ifndef has_dos_drive_prefix 115 #define has_dos_drive_prefix(path) 0 116 #endif 117 118 #ifndef is_dir_sep 119 #define is_dir_sep(c) ((c) == '/') 120 #endif 121 122 #ifdef __GNUC__ 123 #define NORETURN __attribute__((__noreturn__)) 124 #else 125 #define NORETURN 126 #ifndef __attribute__ 127 #define __attribute__(x) 128 #endif 129 #endif 130 131 #define PERF_GTK_DSO "libperf-gtk.so" 132 133 /* General helper functions */ 134 extern void usage(const char *err) NORETURN; 135 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); 136 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); 137 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); 138 139 #include "../../../include/linux/stringify.h" 140 141 #define DIE_IF(cnd) \ 142 do { if (cnd) \ 143 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \ 144 __stringify(cnd) "\n"); \ 145 } while (0) 146 147 148 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); 149 150 extern int prefixcmp(const char *str, const char *prefix); 151 extern void set_buildid_dir(const char *dir); 152 153 static inline const char *skip_prefix(const char *str, const char *prefix) 154 { 155 size_t len = strlen(prefix); 156 return strncmp(str, prefix, len) ? NULL : str + len; 157 } 158 159 #ifdef __GLIBC_PREREQ 160 #if __GLIBC_PREREQ(2, 1) 161 #define HAVE_STRCHRNUL 162 #endif 163 #endif 164 165 #ifndef HAVE_STRCHRNUL 166 #define strchrnul gitstrchrnul 167 static inline char *gitstrchrnul(const char *s, int c) 168 { 169 while (*s && *s != c) 170 s++; 171 return (char *)s; 172 } 173 #endif 174 175 /* 176 * Wrappers: 177 */ 178 extern char *xstrdup(const char *str); 179 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak)); 180 181 182 static inline void *zalloc(size_t size) 183 { 184 return calloc(1, size); 185 } 186 187 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; }) 188 189 static inline int has_extension(const char *filename, const char *ext) 190 { 191 size_t len = strlen(filename); 192 size_t extlen = strlen(ext); 193 194 return len > extlen && !memcmp(filename + len - extlen, ext, extlen); 195 } 196 197 /* Sane ctype - no locale, and works with signed chars */ 198 #undef isascii 199 #undef isspace 200 #undef isdigit 201 #undef isxdigit 202 #undef isalpha 203 #undef isprint 204 #undef isalnum 205 #undef islower 206 #undef isupper 207 #undef tolower 208 #undef toupper 209 210 #ifndef NSEC_PER_MSEC 211 #define NSEC_PER_MSEC 1000000L 212 #endif 213 214 int parse_nsec_time(const char *str, u64 *ptime); 215 216 extern unsigned char sane_ctype[256]; 217 #define GIT_SPACE 0x01 218 #define GIT_DIGIT 0x02 219 #define GIT_ALPHA 0x04 220 #define GIT_GLOB_SPECIAL 0x08 221 #define GIT_REGEX_SPECIAL 0x10 222 #define GIT_PRINT_EXTRA 0x20 223 #define GIT_PRINT 0x3E 224 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) 225 #define isascii(x) (((x) & ~0x7f) == 0) 226 #define isspace(x) sane_istest(x,GIT_SPACE) 227 #define isdigit(x) sane_istest(x,GIT_DIGIT) 228 #define isxdigit(x) \ 229 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G') 230 #define isalpha(x) sane_istest(x,GIT_ALPHA) 231 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) 232 #define isprint(x) sane_istest(x,GIT_PRINT) 233 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20)) 234 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20)) 235 #define tolower(x) sane_case((unsigned char)(x), 0x20) 236 #define toupper(x) sane_case((unsigned char)(x), 0) 237 238 static inline int sane_case(int x, int high) 239 { 240 if (sane_istest(x, GIT_ALPHA)) 241 x = (x & ~0x20) | high; 242 return x; 243 } 244 245 int mkdir_p(char *path, mode_t mode); 246 int rm_rf(char *path); 247 int copyfile(const char *from, const char *to); 248 int copyfile_mode(const char *from, const char *to, mode_t mode); 249 int copyfile_offset(int fromfd, loff_t from_ofs, int tofd, loff_t to_ofs, u64 size); 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 static inline bool strisglob(const char *str) 257 { 258 return strpbrk(str, "*?[") != NULL; 259 } 260 int strtailcmp(const char *s1, const char *s2); 261 char *strxfrchar(char *s, char from, char to); 262 unsigned long convert_unit(unsigned long value, char *unit); 263 ssize_t readn(int fd, void *buf, size_t n); 264 ssize_t writen(int fd, void *buf, size_t n); 265 266 struct perf_event_attr; 267 268 void event_attr_init(struct perf_event_attr *attr); 269 270 #define _STR(x) #x 271 #define STR(x) _STR(x) 272 273 size_t hex_width(u64 v); 274 int hex2u64(const char *ptr, u64 *val); 275 276 char *ltrim(char *s); 277 char *rtrim(char *s); 278 279 void dump_stack(void); 280 void sighandler_dump_stack(int sig); 281 282 extern unsigned int page_size; 283 extern int cacheline_size; 284 285 void get_term_dimensions(struct winsize *ws); 286 void set_term_quiet_input(struct termios *old); 287 288 struct parse_tag { 289 char tag; 290 int mult; 291 }; 292 293 unsigned long parse_tag_value(const char *str, struct parse_tag *tags); 294 295 #define SRCLINE_UNKNOWN ((char *) "??:0") 296 297 static inline int path__join(char *bf, size_t size, 298 const char *path1, const char *path2) 299 { 300 return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2); 301 } 302 303 static inline int path__join3(char *bf, size_t size, 304 const char *path1, const char *path2, 305 const char *path3) 306 { 307 return scnprintf(bf, size, "%s%s%s%s%s", 308 path1, path1[0] ? "/" : "", 309 path2, path2[0] ? "/" : "", path3); 310 } 311 312 struct dso; 313 struct symbol; 314 315 extern bool srcline_full_filename; 316 char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym, 317 bool show_sym); 318 char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym, 319 bool show_sym, bool unwind_inlines); 320 void free_srcline(char *srcline); 321 322 int filename__read_str(const char *filename, char **buf, size_t *sizep); 323 int perf_event_paranoid(void); 324 325 void mem_bswap_64(void *src, int byte_size); 326 void mem_bswap_32(void *src, int byte_size); 327 328 const char *get_filename_for_perf_kvm(void); 329 bool find_process(const char *name); 330 331 #ifdef HAVE_ZLIB_SUPPORT 332 int gzip_decompress_to_file(const char *input, int output_fd); 333 #endif 334 335 #ifdef HAVE_LZMA_SUPPORT 336 int lzma_decompress_to_file(const char *input, int output_fd); 337 #endif 338 339 char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints); 340 341 static inline char *asprintf_expr_in_ints(const char *var, size_t nints, int *ints) 342 { 343 return asprintf_expr_inout_ints(var, true, nints, ints); 344 } 345 346 static inline char *asprintf_expr_not_in_ints(const char *var, size_t nints, int *ints) 347 { 348 return asprintf_expr_inout_ints(var, false, nints, ints); 349 } 350 351 int get_stack_size(const char *str, unsigned long *_size); 352 353 #endif /* GIT_COMPAT_UTIL_H */ 354