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 /* 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 /* General helper functions */
 132 extern void usage(const char *err) NORETURN;
 133 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
 134 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 135 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 136
 137 #include "../../../include/linux/stringify.h"
 138
 139 #define DIE_IF(cnd)     \
 140         do { if (cnd)   \
 141                 die(" at (" __FILE__ ":" __stringify(__LINE__) "): "    \
 142                     __stringify(cnd) "\n");                             \
 143         } while (0)
 144
 145
 146 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 147
 148 extern int prefixcmp(const char *str, const char *prefix);
 149 extern time_t tm_to_time_t(const struct tm *tm);
 150
 151 static inline const char *skip_prefix(const char *str, const char *prefix)
 152 {
 153         size_t len = strlen(prefix);
 154         return strncmp(str, prefix, len) ? NULL : str + len;
 155 }
 156
 157 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 158
 159 #ifndef PROT_READ
 160 #define PROT_READ 1
 161 #define PROT_WRITE 2
 162 #define MAP_PRIVATE 1
 163 #define MAP_FAILED ((void*)-1)
 164 #endif
 165
 166 #define mmap git_mmap
 167 #define munmap git_munmap
 168 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 169 extern int git_munmap(void *start, size_t length);
 170
 171 #else /* NO_MMAP || USE_WIN32_MMAP */
 172
 173 #include <sys/mman.h>
 174
 175 #endif /* NO_MMAP || USE_WIN32_MMAP */
 176
 177 #ifdef NO_MMAP
 178
 179 /* This value must be multiple of (pagesize * 2) */
 180 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 181
 182 #else /* NO_MMAP */
 183
 184 /* This value must be multiple of (pagesize * 2) */
 185 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 186         (sizeof(void*) >= 8 \
 187                 ?  1 * 1024 * 1024 * 1024 \
 188                 : 32 * 1024 * 1024)
 189
 190 #endif /* NO_MMAP */
 191
 192 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 193 #define on_disk_bytes(st) ((st).st_size)
 194 #else
 195 #define on_disk_bytes(st) ((st).st_blocks * 512)
 196 #endif
 197
 198 #define DEFAULT_PACKED_GIT_LIMIT \
 199         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 200
 201 #ifdef NO_PREAD
 202 #define pread git_pread
 203 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 204 #endif
 205 /*
 206  * Forward decl that will remind us if its twin in cache.h changes.
 207  * This function is used in compat/pread.c.  But we can't include
 208  * cache.h there.
 209  */
 210 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 211
 212 #ifdef NO_SETENV
 213 #define setenv gitsetenv
 214 extern int gitsetenv(const char *, const char *, int);
 215 #endif
 216
 217 #ifdef NO_MKDTEMP
 218 #define mkdtemp gitmkdtemp
 219 extern char *gitmkdtemp(char *);
 220 #endif
 221
 222 #ifdef NO_UNSETENV
 223 #define unsetenv gitunsetenv
 224 extern void gitunsetenv(const char *);
 225 #endif
 226
 227 #ifdef NO_STRCASESTR
 228 #define strcasestr gitstrcasestr
 229 extern char *gitstrcasestr(const char *haystack, const char *needle);
 230 #endif
 231
 232 #ifdef NO_STRLCPY
 233 #define strlcpy gitstrlcpy
 234 extern size_t gitstrlcpy(char *, const char *, size_t);
 235 #endif
 236
 237 #ifdef NO_STRTOUMAX
 238 #define strtoumax gitstrtoumax
 239 extern uintmax_t gitstrtoumax(const char *, char **, int);
 240 #endif
 241
 242 #ifdef NO_HSTRERROR
 243 #define hstrerror githstrerror
 244 extern const char *githstrerror(int herror);
 245 #endif
 246
 247 #ifdef NO_MEMMEM
 248 #define memmem gitmemmem
 249 void *gitmemmem(const void *haystack, size_t haystacklen,
 250                 const void *needle, size_t needlelen);
 251 #endif
 252
 253 #ifdef FREAD_READS_DIRECTORIES
 254 #ifdef fopen
 255 #undef fopen
 256 #endif
 257 #define fopen(a,b) git_fopen(a,b)
 258 extern FILE *git_fopen(const char*, const char*);
 259 #endif
 260
 261 #ifdef SNPRINTF_RETURNS_BOGUS
 262 #define snprintf git_snprintf
 263 extern int git_snprintf(char *str, size_t maxsize,
 264                         const char *format, ...);
 265 #define vsnprintf git_vsnprintf
 266 extern int git_vsnprintf(char *str, size_t maxsize,
 267                          const char *format, va_list ap);
 268 #endif
 269
 270 #ifdef __GLIBC_PREREQ
 271 #if __GLIBC_PREREQ(2, 1)
 272 #define HAVE_STRCHRNUL
 273 #endif
 274 #endif
 275
 276 #ifndef HAVE_STRCHRNUL
 277 #define strchrnul gitstrchrnul
 278 static inline char *gitstrchrnul(const char *s, int c)
 279 {
 280         while (*s && *s != c)
 281                 s++;
 282         return (char *)s;
 283 }
 284 #endif
 285
 286 /*
 287  * Wrappers:
 288  */
 289 extern char *xstrdup(const char *str);
 290 extern void *xmalloc(size_t size);
 291 extern void *xmemdupz(const void *data, size_t len);
 292 extern char *xstrndup(const char *str, size_t len);
 293 extern void *xrealloc(void *ptr, size_t size);
 294 extern void *xcalloc(size_t nmemb, size_t size);
 295 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 296 extern ssize_t xread(int fd, void *buf, size_t len);
 297 extern ssize_t xwrite(int fd, const void *buf, size_t len);
 298 extern int xdup(int fd);
 299 extern FILE *xfdopen(int fd, const char *mode);
 300 extern int xmkstemp(char *template);
 301
 302 static inline size_t xsize_t(off_t len)
 303 {
 304         return (size_t)len;
 305 }
 306
 307 static inline int has_extension(const char *filename, const char *ext)
 308 {
 309         size_t len = strlen(filename);
 310         size_t extlen = strlen(ext);
 311         return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 312 }
 313
 314 /* Sane ctype - no locale, and works with signed chars */
 315 #undef isascii
 316 #undef isspace
 317 #undef isdigit
 318 #undef isxdigit
 319 #undef isalpha
 320 #undef isprint
 321 #undef isalnum
 322 #undef tolower
 323 #undef toupper
 324 extern unsigned char sane_ctype[256];
 325 #define GIT_SPACE               0x01
 326 #define GIT_DIGIT               0x02
 327 #define GIT_ALPHA               0x04
 328 #define GIT_GLOB_SPECIAL        0x08
 329 #define GIT_REGEX_SPECIAL       0x10
 330 #define GIT_PRINT_EXTRA         0x20
 331 #define GIT_PRINT               0x3E
 332 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 333 #define isascii(x) (((x) & ~0x7f) == 0)
 334 #define isspace(x) sane_istest(x,GIT_SPACE)
 335 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 336 #define isxdigit(x)     \
 337         (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
 338 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 339 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 340 #define isprint(x) sane_istest(x,GIT_PRINT)
 341 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 342 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 343 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 344 #define toupper(x) sane_case((unsigned char)(x), 0)
 345
 346 static inline int sane_case(int x, int high)
 347 {
 348         if (sane_istest(x, GIT_ALPHA))
 349                 x = (x & ~0x20) | high;
 350         return x;
 351 }
 352
 353 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 354 {
 355         unsigned long ul;
 356         char *p;
 357
 358         errno = 0;
 359         ul = strtoul(s, &p, base);
 360         if (errno || *p || p == s || (unsigned int) ul != ul)
 361                 return -1;
 362         *result = ul;
 363         return 0;
 364 }
 365
 366 static inline int strtol_i(char const *s, int base, int *result)
 367 {
 368         long ul;
 369         char *p;
 370
 371         errno = 0;
 372         ul = strtol(s, &p, base);
 373         if (errno || *p || p == s || (int) ul != ul)
 374                 return -1;
 375         *result = ul;
 376         return 0;
 377 }
 378
 379 #ifdef INTERNAL_QSORT
 380 void git_qsort(void *base, size_t nmemb, size_t size,
 381                int(*compar)(const void *, const void *));
 382 #define qsort git_qsort
 383 #endif
 384
 385 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 386 # define FORCE_DIR_SET_GID S_ISGID
 387 #else
 388 # define FORCE_DIR_SET_GID 0
 389 #endif
 390
 391 #ifdef NO_NSEC
 392 #undef USE_NSEC
 393 #define ST_CTIME_NSEC(st) 0
 394 #define ST_MTIME_NSEC(st) 0
 395 #else
 396 #ifdef USE_ST_TIMESPEC
 397 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 398 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 399 #else
 400 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 401 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 402 #endif
 403 #endif
 404
 405 #endif