Andrew's git - gitweb.git/blob

   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#if !defined(__APPLE__) && !defined(__FreeBSD__)  && !defined(__USLC__) && !defined(_M_UNIX)
  43#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
  44#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
  45#endif
  46#define _ALL_SOURCE 1
  47#define _GNU_SOURCE 1
  48#define _BSD_SOURCE 1
  49
  50#include <unistd.h>
  51#include <stdio.h>
  52#include <sys/stat.h>
  53#include <fcntl.h>
  54#include <stddef.h>
  55#include <stdlib.h>
  56#include <stdarg.h>
  57#include <string.h>
  58#include <errno.h>
  59#include <limits.h>
  60#include <sys/param.h>
  61#include <sys/types.h>
  62#include <dirent.h>
  63#include <sys/time.h>
  64#include <time.h>
  65#include <signal.h>
  66#include <fnmatch.h>
  67#include <assert.h>
  68#include <regex.h>
  69#include <utime.h>
  70#ifndef __MINGW32__
  71#include <sys/wait.h>
  72#include <sys/poll.h>
  73#include <sys/socket.h>
  74#include <sys/ioctl.h>
  75#ifndef NO_SYS_SELECT_H
  76#include <sys/select.h>
  77#endif
  78#include <netinet/in.h>
  79#include <netinet/tcp.h>
  80#include <arpa/inet.h>
  81#include <netdb.h>
  82#include <pwd.h>
  83#include <inttypes.h>
  84#if defined(__CYGWIN__)
  85#undef _XOPEN_SOURCE
  86#include <grp.h>
  87#define _XOPEN_SOURCE 600
  88#include "compat/cygwin.h"
  89#else
  90#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
  91#include <grp.h>
  92#define _ALL_SOURCE 1
  93#endif
  94#else   /* __MINGW32__ */
  95/* pull in Windows compatibility stuff */
  96#include "compat/mingw.h"
  97#endif  /* __MINGW32__ */
  98
  99#ifndef NO_ICONV
 100#include <iconv.h>
 101#endif
 102
 103#ifndef NO_OPENSSL
 104#include <openssl/ssl.h>
 105#include <openssl/err.h>
 106#endif
 107
 108/* On most systems <limits.h> would have given us this, but
 109 * not on some systems (e.g. GNU/Hurd).
 110 */
 111#ifndef PATH_MAX
 112#define PATH_MAX 4096
 113#endif
 114
 115#ifndef PRIuMAX
 116#define PRIuMAX "llu"
 117#endif
 118
 119#ifndef PRIu32
 120#define PRIu32 "u"
 121#endif
 122
 123#ifndef PRIx32
 124#define PRIx32 "x"
 125#endif
 126
 127#ifndef PATH_SEP
 128#define PATH_SEP ':'
 129#endif
 130
 131#ifndef STRIP_EXTENSION
 132#define STRIP_EXTENSION ""
 133#endif
 134
 135#ifndef has_dos_drive_prefix
 136#define has_dos_drive_prefix(path) 0
 137#endif
 138
 139#ifndef is_dir_sep
 140#define is_dir_sep(c) ((c) == '/')
 141#endif
 142
 143#ifdef __GNUC__
 144#define NORETURN __attribute__((__noreturn__))
 145#else
 146#define NORETURN
 147#ifndef __attribute__
 148#define __attribute__(x)
 149#endif
 150#endif
 151
 152/* General helper functions */
 153extern void usage(const char *err) NORETURN;
 154extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
 155extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 156extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 157
 158extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 159
 160extern int prefixcmp(const char *str, const char *prefix);
 161extern time_t tm_to_time_t(const struct tm *tm);
 162
 163static inline const char *skip_prefix(const char *str, const char *prefix)
 164{
 165        size_t len = strlen(prefix);
 166        return strncmp(str, prefix, len) ? NULL : str + len;
 167}
 168
 169#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 170
 171#ifndef PROT_READ
 172#define PROT_READ 1
 173#define PROT_WRITE 2
 174#define MAP_PRIVATE 1
 175#define MAP_FAILED ((void*)-1)
 176#endif
 177
 178#define mmap git_mmap
 179#define munmap git_munmap
 180extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 181extern int git_munmap(void *start, size_t length);
 182
 183#else /* NO_MMAP || USE_WIN32_MMAP */
 184
 185#include <sys/mman.h>
 186
 187#endif /* NO_MMAP || USE_WIN32_MMAP */
 188
 189#ifdef NO_MMAP
 190
 191/* This value must be multiple of (pagesize * 2) */
 192#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 193
 194#else /* NO_MMAP */
 195
 196/* This value must be multiple of (pagesize * 2) */
 197#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 198        (sizeof(void*) >= 8 \
 199                ?  1 * 1024 * 1024 * 1024 \
 200                : 32 * 1024 * 1024)
 201
 202#endif /* NO_MMAP */
 203
 204#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 205#define on_disk_bytes(st) ((st).st_size)
 206#else
 207#define on_disk_bytes(st) ((st).st_blocks * 512)
 208#endif
 209
 210#define DEFAULT_PACKED_GIT_LIMIT \
 211        ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 212
 213#ifdef NO_PREAD
 214#define pread git_pread
 215extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 216#endif
 217/*
 218 * Forward decl that will remind us if its twin in cache.h changes.
 219 * This function is used in compat/pread.c.  But we can't include
 220 * cache.h there.
 221 */
 222extern ssize_t read_in_full(int fd, void *buf, size_t count);
 223
 224#ifdef NO_SETENV
 225#define setenv gitsetenv
 226extern int gitsetenv(const char *, const char *, int);
 227#endif
 228
 229#ifdef NO_MKDTEMP
 230#define mkdtemp gitmkdtemp
 231extern char *gitmkdtemp(char *);
 232#endif
 233
 234#ifdef NO_UNSETENV
 235#define unsetenv gitunsetenv
 236extern void gitunsetenv(const char *);
 237#endif
 238
 239#ifdef NO_STRCASESTR
 240#define strcasestr gitstrcasestr
 241extern char *gitstrcasestr(const char *haystack, const char *needle);
 242#endif
 243
 244#ifdef NO_STRLCPY
 245#define strlcpy gitstrlcpy
 246extern size_t gitstrlcpy(char *, const char *, size_t);
 247#endif
 248
 249#ifdef NO_STRTOUMAX
 250#define strtoumax gitstrtoumax
 251extern uintmax_t gitstrtoumax(const char *, char **, int);
 252#endif
 253
 254#ifdef NO_HSTRERROR
 255#define hstrerror githstrerror
 256extern const char *githstrerror(int herror);
 257#endif
 258
 259#ifdef NO_MEMMEM
 260#define memmem gitmemmem
 261void *gitmemmem(const void *haystack, size_t haystacklen,
 262                const void *needle, size_t needlelen);
 263#endif
 264
 265#ifdef FREAD_READS_DIRECTORIES
 266#ifdef fopen
 267#undef fopen
 268#endif
 269#define fopen(a,b) git_fopen(a,b)
 270extern FILE *git_fopen(const char*, const char*);
 271#endif
 272
 273#ifdef SNPRINTF_RETURNS_BOGUS
 274#define snprintf git_snprintf
 275extern int git_snprintf(char *str, size_t maxsize,
 276                        const char *format, ...);
 277#define vsnprintf git_vsnprintf
 278extern int git_vsnprintf(char *str, size_t maxsize,
 279                         const char *format, va_list ap);
 280#endif
 281
 282#ifdef __GLIBC_PREREQ
 283#if __GLIBC_PREREQ(2, 1)
 284#define HAVE_STRCHRNUL
 285#endif
 286#endif
 287
 288#ifndef HAVE_STRCHRNUL
 289#define strchrnul gitstrchrnul
 290static inline char *gitstrchrnul(const char *s, int c)
 291{
 292        while (*s && *s != c)
 293                s++;
 294        return (char *)s;
 295}
 296#endif
 297
 298extern void release_pack_memory(size_t, int);
 299
 300extern char *xstrdup(const char *str);
 301extern void *xmalloc(size_t size);
 302extern void *xmemdupz(const void *data, size_t len);
 303extern char *xstrndup(const char *str, size_t len);
 304extern void *xrealloc(void *ptr, size_t size);
 305extern void *xcalloc(size_t nmemb, size_t size);
 306extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 307extern ssize_t xread(int fd, void *buf, size_t len);
 308extern ssize_t xwrite(int fd, const void *buf, size_t len);
 309extern int xdup(int fd);
 310extern FILE *xfdopen(int fd, const char *mode);
 311extern int xmkstemp(char *template);
 312extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
 313extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1);
 314
 315static inline size_t xsize_t(off_t len)
 316{
 317        return (size_t)len;
 318}
 319
 320static inline int has_extension(const char *filename, const char *ext)
 321{
 322        size_t len = strlen(filename);
 323        size_t extlen = strlen(ext);
 324        return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 325}
 326
 327/* Sane ctype - no locale, and works with signed chars */
 328#undef isascii
 329#undef isspace
 330#undef isdigit
 331#undef isalpha
 332#undef isalnum
 333#undef tolower
 334#undef toupper
 335extern unsigned char sane_ctype[256];
 336#define GIT_SPACE 0x01
 337#define GIT_DIGIT 0x02
 338#define GIT_ALPHA 0x04
 339#define GIT_GLOB_SPECIAL 0x08
 340#define GIT_REGEX_SPECIAL 0x10
 341#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 342#define isascii(x) (((x) & ~0x7f) == 0)
 343#define isspace(x) sane_istest(x,GIT_SPACE)
 344#define isdigit(x) sane_istest(x,GIT_DIGIT)
 345#define isalpha(x) sane_istest(x,GIT_ALPHA)
 346#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 347#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
 348#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
 349#define tolower(x) sane_case((unsigned char)(x), 0x20)
 350#define toupper(x) sane_case((unsigned char)(x), 0)
 351
 352static inline int sane_case(int x, int high)
 353{
 354        if (sane_istest(x, GIT_ALPHA))
 355                x = (x & ~0x20) | high;
 356        return x;
 357}
 358
 359static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 360{
 361        unsigned long ul;
 362        char *p;
 363
 364        errno = 0;
 365        ul = strtoul(s, &p, base);
 366        if (errno || *p || p == s || (unsigned int) ul != ul)
 367                return -1;
 368        *result = ul;
 369        return 0;
 370}
 371
 372static inline int strtol_i(char const *s, int base, int *result)
 373{
 374        long ul;
 375        char *p;
 376
 377        errno = 0;
 378        ul = strtol(s, &p, base);
 379        if (errno || *p || p == s || (int) ul != ul)
 380                return -1;
 381        *result = ul;
 382        return 0;
 383}
 384
 385#ifdef INTERNAL_QSORT
 386void git_qsort(void *base, size_t nmemb, size_t size,
 387               int(*compar)(const void *, const void *));
 388#define qsort git_qsort
 389#endif
 390
 391#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 392# define FORCE_DIR_SET_GID S_ISGID
 393#else
 394# define FORCE_DIR_SET_GID 0
 395#endif
 396
 397#ifdef NO_NSEC
 398#undef USE_NSEC
 399#define ST_CTIME_NSEC(st) 0
 400#define ST_MTIME_NSEC(st) 0
 401#else
 402#ifdef USE_ST_TIMESPEC
 403#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
 404#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
 405#else
 406#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 407#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 408#endif
 409#endif
 410
 411#endif