tools/perf/util/util.h

   1 #ifndef GIT_COMPAT_UTIL_H
   2 #define GIT_COMPAT_UTIL_H
   3
   4 #define _FILE_OFFSET_BITS 64
   5
   6 #ifndef FLEX_ARRAY
   7 /*
   8  * See if our compiler is known to support flexible array members.
   9  */
  10 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
  11 # define FLEX_ARRAY /* empty */
  12 #elif defined(__GNUC__)
  13 # if (__GNUC__ >= 3)
  14 #  define FLEX_ARRAY /* empty */
  15 # else
  16 #  define FLEX_ARRAY 0 /* older GNU extension */
  17 # endif
  18 #endif
  19
  20 /*
  21  * Otherwise, default to safer but a bit wasteful traditional style
  22  */
  23 #ifndef FLEX_ARRAY
  24 # define FLEX_ARRAY 1
  25 #endif
  26 #endif
  27
  28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  29
  30 #ifdef __GNUC__
  31 #define TYPEOF(x) (__typeof__(x))
  32 #else
  33 #define TYPEOF(x)
  34 #endif
  35
  36 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
  37 #define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */
  38
  39 /* Approximation of the length of the decimal representation of this type. */
  40 #define decimal_length(x)       ((int)(sizeof(x) * 2.56 + 0.5) + 1)
  41
  42 #define _ALL_SOURCE 1
  43 #define _GNU_SOURCE 1
  44 #define _BSD_SOURCE 1
  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 <stddef.h>
  52 #include <stdlib.h>
  53 #include <stdarg.h>
  54 #include <string.h>
  55 #include <errno.h>
  56 #include <limits.h>
  57 #include <sys/param.h>
  58 #include <sys/types.h>
  59 #include <dirent.h>
  60 #include <sys/time.h>
  61 #include <time.h>
  62 #include <signal.h>
  63 #include <fnmatch.h>
  64 #include <assert.h>
  65 #include <regex.h>
  66 #include <utime.h>
  67 #include <sys/wait.h>
  68 #include <sys/poll.h>
  69 #include <sys/socket.h>
  70 #include <sys/ioctl.h>
  71 #ifndef NO_SYS_SELECT_H
  72 #include <sys/select.h>
  73 #endif
  74 #include <netinet/in.h>
  75 #include <netinet/tcp.h>
  76 #include <arpa/inet.h>
  77 #include <netdb.h>
  78 #include <pwd.h>
  79 #include <inttypes.h>
  80 #include "../../../include/linux/magic.h"
  81
  82
  83 #ifndef NO_ICONV
  84 #include <iconv.h>
  85 #endif
  86
  87 extern const char *graph_line;
  88 extern const char *graph_dotted_line;
  89
  90 /* On most systems <limits.h> would have given us this, but
  91  * not on some systems (e.g. GNU/Hurd).
  92  */
  93 #ifndef PATH_MAX
  94 #define PATH_MAX 4096
  95 #endif
  96
  97 #ifndef PRIuMAX
  98 #define PRIuMAX "llu"
  99 #endif
 100
 101 #ifndef PRIu32
 102 #define PRIu32 "u"
 103 #endif
 104
 105 #ifndef PRIx32
 106 #define PRIx32 "x"
 107 #endif
 108
 109 #ifndef PATH_SEP
 110 #define PATH_SEP ':'
 111 #endif
 112
 113 #ifndef STRIP_EXTENSION
 114 #define STRIP_EXTENSION ""
 115 #endif
 116
 117 #ifndef has_dos_drive_prefix
 118 #define has_dos_drive_prefix(path) 0
 119 #endif
 120
 121 #ifndef is_dir_sep
 122 #define is_dir_sep(c) ((c) == '/')
 123 #endif
 124
 125 #ifdef __GNUC__
 126 #define NORETURN __attribute__((__noreturn__))
 127 #else
 128 #define NORETURN
 129 #ifndef __attribute__
 130 #define __attribute__(x)
 131 #endif
 132 #endif
 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 time_t tm_to_time_t(const struct tm *tm);
 153
 154 static inline const char *skip_prefix(const char *str, const char *prefix)
 155 {
 156         size_t len = strlen(prefix);
 157         return strncmp(str, prefix, len) ? NULL : str + len;
 158 }
 159
 160 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 161
 162 #ifndef PROT_READ
 163 #define PROT_READ 1
 164 #define PROT_WRITE 2
 165 #define MAP_PRIVATE 1
 166 #define MAP_FAILED ((void*)-1)
 167 #endif
 168
 169 #define mmap git_mmap
 170 #define munmap git_munmap
 171 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 172 extern int git_munmap(void *start, size_t length);
 173
 174 #else /* NO_MMAP || USE_WIN32_MMAP */
 175
 176 #include <sys/mman.h>
 177
 178 #endif /* NO_MMAP || USE_WIN32_MMAP */
 179
 180 #ifdef NO_MMAP
 181
 182 /* This value must be multiple of (pagesize * 2) */
 183 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 184
 185 #else /* NO_MMAP */
 186
 187 /* This value must be multiple of (pagesize * 2) */
 188 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 189         (sizeof(void*) >= 8 \
 190                 ?  1 * 1024 * 1024 * 1024 \
 191                 : 32 * 1024 * 1024)
 192
 193 #endif /* NO_MMAP */
 194
 195 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 196 #define on_disk_bytes(st) ((st).st_size)
 197 #else
 198 #define on_disk_bytes(st) ((st).st_blocks * 512)
 199 #endif
 200
 201 #define DEFAULT_PACKED_GIT_LIMIT \
 202         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 203
 204 #ifdef NO_PREAD
 205 #define pread git_pread
 206 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 207 #endif
 208 /*
 209  * Forward decl that will remind us if its twin in cache.h changes.
 210  * This function is used in compat/pread.c.  But we can't include
 211  * cache.h there.
 212  */
 213 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 214
 215 #ifdef NO_SETENV
 216 #define setenv gitsetenv
 217 extern int gitsetenv(const char *, const char *, int);
 218 #endif
 219
 220 #ifdef NO_MKDTEMP
 221 #define mkdtemp gitmkdtemp
 222 extern char *gitmkdtemp(char *);
 223 #endif
 224
 225 #ifdef NO_UNSETENV
 226 #define unsetenv gitunsetenv
 227 extern void gitunsetenv(const char *);
 228 #endif
 229
 230 #ifdef NO_STRCASESTR
 231 #define strcasestr gitstrcasestr
 232 extern char *gitstrcasestr(const char *haystack, const char *needle);
 233 #endif
 234
 235 #ifdef NO_STRLCPY
 236 #define strlcpy gitstrlcpy
 237 extern size_t gitstrlcpy(char *, const char *, size_t);
 238 #endif
 239
 240 #ifdef NO_STRTOUMAX
 241 #define strtoumax gitstrtoumax
 242 extern uintmax_t gitstrtoumax(const char *, char **, int);
 243 #endif
 244
 245 #ifdef NO_HSTRERROR
 246 #define hstrerror githstrerror
 247 extern const char *githstrerror(int herror);
 248 #endif
 249
 250 #ifdef NO_MEMMEM
 251 #define memmem gitmemmem
 252 void *gitmemmem(const void *haystack, size_t haystacklen,
 253                 const void *needle, size_t needlelen);
 254 #endif
 255
 256 #ifdef FREAD_READS_DIRECTORIES
 257 #ifdef fopen
 258 #undef fopen
 259 #endif
 260 #define fopen(a,b) git_fopen(a,b)
 261 extern FILE *git_fopen(const char*, const char*);
 262 #endif
 263
 264 #ifdef SNPRINTF_RETURNS_BOGUS
 265 #define snprintf git_snprintf
 266 extern int git_snprintf(char *str, size_t maxsize,
 267                         const char *format, ...);
 268 #define vsnprintf git_vsnprintf
 269 extern int git_vsnprintf(char *str, size_t maxsize,
 270                          const char *format, va_list ap);
 271 #endif
 272
 273 #ifdef __GLIBC_PREREQ
 274 #if __GLIBC_PREREQ(2, 1)
 275 #define HAVE_STRCHRNUL
 276 #endif
 277 #endif
 278
 279 #ifndef HAVE_STRCHRNUL
 280 #define strchrnul gitstrchrnul
 281 static inline char *gitstrchrnul(const char *s, int c)
 282 {
 283         while (*s && *s != c)
 284                 s++;
 285         return (char *)s;
 286 }
 287 #endif
 288
 289 /*
 290  * Wrappers:
 291  */
 292 extern char *xstrdup(const char *str);
 293 extern void *xmalloc(size_t size) __attribute__((weak));
 294 extern void *xmemdupz(const void *data, size_t len);
 295 extern char *xstrndup(const char *str, size_t len);
 296 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
 297
 298 static inline void *zalloc(size_t size)
 299 {
 300         return calloc(1, size);
 301 }
 302
 303 static inline size_t xsize_t(off_t len)
 304 {
 305         return (size_t)len;
 306 }
 307
 308 static inline int has_extension(const char *filename, const char *ext)
 309 {
 310         size_t len = strlen(filename);
 311         size_t extlen = strlen(ext);
 312         return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 313 }
 314
 315 /* Sane ctype - no locale, and works with signed chars */
 316 #undef isascii
 317 #undef isspace
 318 #undef isdigit
 319 #undef isxdigit
 320 #undef isalpha
 321 #undef isprint
 322 #undef isalnum
 323 #undef tolower
 324 #undef toupper
 325 extern unsigned char sane_ctype[256];
 326 #define GIT_SPACE               0x01
 327 #define GIT_DIGIT               0x02
 328 #define GIT_ALPHA               0x04
 329 #define GIT_GLOB_SPECIAL        0x08
 330 #define GIT_REGEX_SPECIAL       0x10
 331 #define GIT_PRINT_EXTRA         0x20
 332 #define GIT_PRINT               0x3E
 333 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 334 #define isascii(x) (((x) & ~0x7f) == 0)
 335 #define isspace(x) sane_istest(x,GIT_SPACE)
 336 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 337 #define isxdigit(x)     \
 338         (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
 339 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 340 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 341 #define isprint(x) sane_istest(x,GIT_PRINT)
 342 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 343 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 344 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 345 #define toupper(x) sane_case((unsigned char)(x), 0)
 346
 347 static inline int sane_case(int x, int high)
 348 {
 349         if (sane_istest(x, GIT_ALPHA))
 350                 x = (x & ~0x20) | high;
 351         return x;
 352 }
 353
 354 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 355 {
 356         unsigned long ul;
 357         char *p;
 358
 359         errno = 0;
 360         ul = strtoul(s, &p, base);
 361         if (errno || *p || p == s || (unsigned int) ul != ul)
 362                 return -1;
 363         *result = ul;
 364         return 0;
 365 }
 366
 367 static inline int strtol_i(char const *s, int base, int *result)
 368 {
 369         long ul;
 370         char *p;
 371
 372         errno = 0;
 373         ul = strtol(s, &p, base);
 374         if (errno || *p || p == s || (int) ul != ul)
 375                 return -1;
 376         *result = ul;
 377         return 0;
 378 }
 379
 380 #ifdef INTERNAL_QSORT
 381 void git_qsort(void *base, size_t nmemb, size_t size,
 382                int(*compar)(const void *, const void *));
 383 #define qsort git_qsort
 384 #endif
 385
 386 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 387 # define FORCE_DIR_SET_GID S_ISGID
 388 #else
 389 # define FORCE_DIR_SET_GID 0
 390 #endif
 391
 392 #ifdef NO_NSEC
 393 #undef USE_NSEC
 394 #define ST_CTIME_NSEC(st) 0
 395 #define ST_MTIME_NSEC(st) 0
 396 #else
 397 #ifdef USE_ST_TIMESPEC
 398 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 399 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 400 #else
 401 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 402 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 403 #endif
 404 #endif
 405
 406 #endif