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#else
  89#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
  90#include <grp.h>
  91#define _ALL_SOURCE 1
  92#endif
  93#else   /* __MINGW32__ */
  94/* pull in Windows compatibility stuff */
  95#include "compat/mingw.h"
  96#endif  /* __MINGW32__ */
  97
  98#ifndef NO_ICONV
  99#include <iconv.h>
 100#endif
 101
 102#ifndef NO_OPENSSL
 103#include <openssl/ssl.h>
 104#include <openssl/err.h>
 105#endif
 106
 107/* On most systems <limits.h> would have given us this, but
 108 * not on some systems (e.g. GNU/Hurd).
 109 */
 110#ifndef PATH_MAX
 111#define PATH_MAX 4096
 112#endif
 113
 114#ifndef PRIuMAX
 115#define PRIuMAX "llu"
 116#endif
 117
 118#ifndef PRIu32
 119#define PRIu32 "u"
 120#endif
 121
 122#ifndef PRIx32
 123#define PRIx32 "x"
 124#endif
 125
 126#ifndef PATH_SEP
 127#define PATH_SEP ':'
 128#endif
 129
 130#ifndef STRIP_EXTENSION
 131#define STRIP_EXTENSION ""
 132#endif
 133
 134#ifndef has_dos_drive_prefix
 135#define has_dos_drive_prefix(path) 0
 136#endif
 137
 138#ifndef is_dir_sep
 139#define is_dir_sep(c) ((c) == '/')
 140#endif
 141
 142#ifdef __GNUC__
 143#define NORETURN __attribute__((__noreturn__))
 144#else
 145#define NORETURN
 146#ifndef __attribute__
 147#define __attribute__(x)
 148#endif
 149#endif
 150
 151/* General helper functions */
 152extern void usage(const char *err) NORETURN;
 153extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
 154extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 155extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 156
 157extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 158
 159extern int prefixcmp(const char *str, const char *prefix);
 160extern time_t tm_to_time_t(const struct tm *tm);
 161
 162static inline const char *skip_prefix(const char *str, const char *prefix)
 163{
 164        size_t len = strlen(prefix);
 165        return strncmp(str, prefix, len) ? NULL : str + len;
 166}
 167
 168#ifdef NO_MMAP
 169
 170#ifndef PROT_READ
 171#define PROT_READ 1
 172#define PROT_WRITE 2
 173#define MAP_PRIVATE 1
 174#define MAP_FAILED ((void*)-1)
 175#endif
 176
 177#define mmap git_mmap
 178#define munmap git_munmap
 179extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 180extern int git_munmap(void *start, size_t length);
 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#include <sys/mman.h>
 188
 189/* This value must be multiple of (pagesize * 2) */
 190#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 191        (sizeof(void*) >= 8 \
 192                ?  1 * 1024 * 1024 * 1024 \
 193                : 32 * 1024 * 1024)
 194
 195#endif /* NO_MMAP */
 196
 197#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 198#define on_disk_bytes(st) ((st).st_size)
 199#else
 200#define on_disk_bytes(st) ((st).st_blocks * 512)
 201#endif
 202
 203#define DEFAULT_PACKED_GIT_LIMIT \
 204        ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 205
 206#ifdef NO_PREAD
 207#define pread git_pread
 208extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 209#endif
 210/*
 211 * Forward decl that will remind us if its twin in cache.h changes.
 212 * This function is used in compat/pread.c.  But we can't include
 213 * cache.h there.
 214 */
 215extern ssize_t read_in_full(int fd, void *buf, size_t count);
 216
 217#ifdef NO_SETENV
 218#define setenv gitsetenv
 219extern int gitsetenv(const char *, const char *, int);
 220#endif
 221
 222#ifdef NO_MKDTEMP
 223#define mkdtemp gitmkdtemp
 224extern char *gitmkdtemp(char *);
 225#endif
 226
 227#ifdef NO_UNSETENV
 228#define unsetenv gitunsetenv
 229extern void gitunsetenv(const char *);
 230#endif
 231
 232#ifdef NO_STRCASESTR
 233#define strcasestr gitstrcasestr
 234extern char *gitstrcasestr(const char *haystack, const char *needle);
 235#endif
 236
 237#ifdef NO_STRLCPY
 238#define strlcpy gitstrlcpy
 239extern size_t gitstrlcpy(char *, const char *, size_t);
 240#endif
 241
 242#ifdef NO_STRTOUMAX
 243#define strtoumax gitstrtoumax
 244extern uintmax_t gitstrtoumax(const char *, char **, int);
 245#endif
 246
 247#ifdef NO_HSTRERROR
 248#define hstrerror githstrerror
 249extern const char *githstrerror(int herror);
 250#endif
 251
 252#ifdef NO_MEMMEM
 253#define memmem gitmemmem
 254void *gitmemmem(const void *haystack, size_t haystacklen,
 255                const void *needle, size_t needlelen);
 256#endif
 257
 258#ifdef FREAD_READS_DIRECTORIES
 259#ifdef fopen
 260#undef fopen
 261#endif
 262#define fopen(a,b) git_fopen(a,b)
 263extern FILE *git_fopen(const char*, const char*);
 264#endif
 265
 266#ifdef SNPRINTF_RETURNS_BOGUS
 267#define snprintf git_snprintf
 268extern int git_snprintf(char *str, size_t maxsize,
 269                        const char *format, ...);
 270#define vsnprintf git_vsnprintf
 271extern int git_vsnprintf(char *str, size_t maxsize,
 272                         const char *format, va_list ap);
 273#endif
 274
 275#ifdef __GLIBC_PREREQ
 276#if __GLIBC_PREREQ(2, 1)
 277#define HAVE_STRCHRNUL
 278#endif
 279#endif
 280
 281#ifndef HAVE_STRCHRNUL
 282#define strchrnul gitstrchrnul
 283static inline char *gitstrchrnul(const char *s, int c)
 284{
 285        while (*s && *s != c)
 286                s++;
 287        return (char *)s;
 288}
 289#endif
 290
 291extern void release_pack_memory(size_t, int);
 292
 293extern char *xstrdup(const char *str);
 294extern void *xmalloc(size_t size);
 295extern void *xmemdupz(const void *data, size_t len);
 296extern char *xstrndup(const char *str, size_t len);
 297extern void *xrealloc(void *ptr, size_t size);
 298extern void *xcalloc(size_t nmemb, size_t size);
 299extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 300extern ssize_t xread(int fd, void *buf, size_t len);
 301extern ssize_t xwrite(int fd, const void *buf, size_t len);
 302extern int xdup(int fd);
 303extern FILE *xfdopen(int fd, const char *mode);
 304extern int xmkstemp(char *template);
 305
 306static inline size_t xsize_t(off_t len)
 307{
 308        return (size_t)len;
 309}
 310
 311static inline int has_extension(const char *filename, const char *ext)
 312{
 313        size_t len = strlen(filename);
 314        size_t extlen = strlen(ext);
 315        return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 316}
 317
 318/* Sane ctype - no locale, and works with signed chars */
 319#undef isspace
 320#undef isdigit
 321#undef isalpha
 322#undef isalnum
 323#undef tolower
 324#undef toupper
 325extern unsigned char sane_ctype[256];
 326#define GIT_SPACE 0x01
 327#define GIT_DIGIT 0x02
 328#define GIT_ALPHA 0x04
 329#define GIT_SPECIAL 0x08
 330#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 331#define isspace(x) sane_istest(x,GIT_SPACE)
 332#define isdigit(x) sane_istest(x,GIT_DIGIT)
 333#define isalpha(x) sane_istest(x,GIT_ALPHA)
 334#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 335#define isspecial(x) sane_istest(x,GIT_SPECIAL)
 336#define tolower(x) sane_case((unsigned char)(x), 0x20)
 337#define toupper(x) sane_case((unsigned char)(x), 0)
 338
 339static inline int sane_case(int x, int high)
 340{
 341        if (sane_istest(x, GIT_ALPHA))
 342                x = (x & ~0x20) | high;
 343        return x;
 344}
 345
 346static inline int strtoul_ui(char const *s, int base, unsigned int *result)
 347{
 348        unsigned long ul;
 349        char *p;
 350
 351        errno = 0;
 352        ul = strtoul(s, &p, base);
 353        if (errno || *p || p == s || (unsigned int) ul != ul)
 354                return -1;
 355        *result = ul;
 356        return 0;
 357}
 358
 359static inline int strtol_i(char const *s, int base, int *result)
 360{
 361        long ul;
 362        char *p;
 363
 364        errno = 0;
 365        ul = strtol(s, &p, base);
 366        if (errno || *p || p == s || (int) ul != ul)
 367                return -1;
 368        *result = ul;
 369        return 0;
 370}
 371
 372#ifdef INTERNAL_QSORT
 373void git_qsort(void *base, size_t nmemb, size_t size,
 374               int(*compar)(const void *, const void *));
 375#define qsort git_qsort
 376#endif
 377
 378#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
 379# define FORCE_DIR_SET_GID S_ISGID
 380#else
 381# define FORCE_DIR_SET_GID 0
 382#endif
 383
 384#endif