Andrew's git / gitweb.git / git-compat-util.h
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git-compat-util.hon commit Merge branch 'nd/merge-quit' (c4a38d1)
   1#ifndef GIT_COMPAT_UTIL_H
   2#define GIT_COMPAT_UTIL_H
   3
   4#define _FILE_OFFSET_BITS 64
   5
   6
   7/* Derived from Linux "Features Test Macro" header
   8 * Convenience macros to test the versions of gcc (or
   9 * a compatible compiler).
  10 * Use them like this:
  11 *  #if GIT_GNUC_PREREQ (2,8)
  12 *   ... code requiring gcc 2.8 or later ...
  13 *  #endif
  14*/
  15#if defined(__GNUC__) && defined(__GNUC_MINOR__)
  16# define GIT_GNUC_PREREQ(maj, min) \
  17        ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  18#else
  19 #define GIT_GNUC_PREREQ(maj, min) 0
  20#endif
  21
  22
  23#ifndef FLEX_ARRAY
  24/*
  25 * See if our compiler is known to support flexible array members.
  26 */
  27#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
  28# define FLEX_ARRAY /* empty */
  29#elif defined(__GNUC__)
  30# if (__GNUC__ >= 3)
  31#  define FLEX_ARRAY /* empty */
  32# else
  33#  define FLEX_ARRAY 0 /* older GNU extension */
  34# endif
  35#endif
  36
  37/*
  38 * Otherwise, default to safer but a bit wasteful traditional style
  39 */
  40#ifndef FLEX_ARRAY
  41# define FLEX_ARRAY 1
  42#endif
  43#endif
  44
  45
  46/*
  47 * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression.
  48 * @cond: the compile-time condition which must be true.
  49 *
  50 * Your compile will fail if the condition isn't true, or can't be evaluated
  51 * by the compiler.  This can be used in an expression: its value is "0".
  52 *
  53 * Example:
  54 *      #define foo_to_char(foo)                                        \
  55 *               ((char *)(foo)                                         \
  56 *                + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0))
  57 */
  58#define BUILD_ASSERT_OR_ZERO(cond) \
  59        (sizeof(char [1 - 2*!(cond)]) - 1)
  60
  61#if GIT_GNUC_PREREQ(3, 1)
  62 /* &arr[0] degrades to a pointer: a different type from an array */
  63# define BARF_UNLESS_AN_ARRAY(arr)                                              \
  64        BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \
  65                                                           __typeof__(&(arr)[0])))
  66#else
  67# define BARF_UNLESS_AN_ARRAY(arr) 0
  68#endif
  69/*
  70 * ARRAY_SIZE - get the number of elements in a visible array
  71 *  <at> x: the array whose size you want.
  72 *
  73 * This does not work on pointers, or arrays declared as [], or
  74 * function parameters.  With correct compiler support, such usage
  75 * will cause a build error (see the build_assert_or_zero macro).
  76 */
  77#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x))
  78
  79#define bitsizeof(x)  (CHAR_BIT * sizeof(x))
  80
  81#define maximum_signed_value_of_type(a) \
  82    (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
  83
  84#define maximum_unsigned_value_of_type(a) \
  85    (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
  86
  87/*
  88 * Signed integer overflow is undefined in C, so here's a helper macro
  89 * to detect if the sum of two integers will overflow.
  90 *
  91 * Requires: a >= 0, typeof(a) equals typeof(b)
  92 */
  93#define signed_add_overflows(a, b) \
  94    ((b) > maximum_signed_value_of_type(a) - (a))
  95
  96#define unsigned_add_overflows(a, b) \
  97    ((b) > maximum_unsigned_value_of_type(a) - (a))
  98
  99/*
 100 * Returns true if the multiplication of "a" and "b" will
 101 * overflow. The types of "a" and "b" must match and must be unsigned.
 102 * Note that this macro evaluates "a" twice!
 103 */
 104#define unsigned_mult_overflows(a, b) \
 105    ((a) && (b) > maximum_unsigned_value_of_type(a) / (a))
 106
 107#ifdef __GNUC__
 108#define TYPEOF(x) (__typeof__(x))
 109#else
 110#define TYPEOF(x)
 111#endif
 112
 113#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
 114#define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */
 115
 116#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 117
 118/* Approximation of the length of the decimal representation of this type. */
 119#define decimal_length(x)       ((int)(sizeof(x) * 2.56 + 0.5) + 1)
 120
 121#if defined(__sun__)
 122 /*
 123  * On Solaris, when _XOPEN_EXTENDED is set, its header file
 124  * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
 125  * setting to say we are XPG5 or XPG6.  Also on Solaris,
 126  * XPG6 programs must be compiled with a c99 compiler, while
 127  * non XPG6 programs must be compiled with a pre-c99 compiler.
 128  */
 129# if __STDC_VERSION__ - 0 >= 199901L
 130# define _XOPEN_SOURCE 600
 131# else
 132# define _XOPEN_SOURCE 500
 133# endif
 134#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
 135      !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
 136      !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
 137      !defined(__CYGWIN__)
 138#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
 139#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
 140#endif
 141#define _ALL_SOURCE 1
 142#define _GNU_SOURCE 1
 143#define _BSD_SOURCE 1
 144#define _DEFAULT_SOURCE 1
 145#define _NETBSD_SOURCE 1
 146#define _SGI_SOURCE 1
 147
 148#if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
 149# if !defined(_WIN32_WINNT)
 150#  define _WIN32_WINNT 0x0600
 151# endif
 152#define WIN32_LEAN_AND_MEAN  /* stops windows.h including winsock.h */
 153#include <winsock2.h>
 154#include <windows.h>
 155#define GIT_WINDOWS_NATIVE
 156#endif
 157
 158#include <unistd.h>
 159#include <stdio.h>
 160#include <sys/stat.h>
 161#include <fcntl.h>
 162#include <stddef.h>
 163#include <stdlib.h>
 164#include <stdarg.h>
 165#include <string.h>
 166#ifdef HAVE_STRINGS_H
 167#include <strings.h> /* for strcasecmp() */
 168#endif
 169#include <errno.h>
 170#include <limits.h>
 171#ifdef NEEDS_SYS_PARAM_H
 172#include <sys/param.h>
 173#endif
 174#include <sys/types.h>
 175#include <dirent.h>
 176#include <sys/time.h>
 177#include <time.h>
 178#include <signal.h>
 179#include <assert.h>
 180#include <regex.h>
 181#include <utime.h>
 182#include <syslog.h>
 183#if !defined(NO_POLL_H)
 184#include <poll.h>
 185#elif !defined(NO_SYS_POLL_H)
 186#include <sys/poll.h>
 187#else
 188/* Pull the compat stuff */
 189#include <poll.h>
 190#endif
 191#ifdef HAVE_BSD_SYSCTL
 192#include <sys/sysctl.h>
 193#endif
 194
 195#if defined(__CYGWIN__)
 196#include "compat/win32/path-utils.h"
 197#endif
 198#if defined(__MINGW32__)
 199/* pull in Windows compatibility stuff */
 200#include "compat/win32/path-utils.h"
 201#include "compat/mingw.h"
 202#elif defined(_MSC_VER)
 203#include "compat/win32/path-utils.h"
 204#include "compat/msvc.h"
 205#else
 206#include <sys/utsname.h>
 207#include <sys/wait.h>
 208#include <sys/resource.h>
 209#include <sys/socket.h>
 210#include <sys/ioctl.h>
 211#include <termios.h>
 212#ifndef NO_SYS_SELECT_H
 213#include <sys/select.h>
 214#endif
 215#include <netinet/in.h>
 216#include <netinet/tcp.h>
 217#include <arpa/inet.h>
 218#include <netdb.h>
 219#include <pwd.h>
 220#include <sys/un.h>
 221#ifndef NO_INTTYPES_H
 222#include <inttypes.h>
 223#else
 224#include <stdint.h>
 225#endif
 226#ifdef NO_INTPTR_T
 227/*
 228 * On I16LP32, ILP32 and LP64 "long" is the safe bet, however
 229 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
 230 * while on IP16 and IP16L32 it is "int" (resp. "short")
 231 * Size needs to match (or exceed) 'sizeof(void *)'.
 232 * We can't take "long long" here as not everybody has it.
 233 */
 234typedef long intptr_t;
 235typedef unsigned long uintptr_t;
 236#endif
 237#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
 238#include <grp.h>
 239#define _ALL_SOURCE 1
 240#endif
 241
 242/* used on Mac OS X */
 243#ifdef PRECOMPOSE_UNICODE
 244#include "compat/precompose_utf8.h"
 245#else
 246#define precompose_str(in,i_nfd2nfc)
 247#define precompose_argv(c,v)
 248#define probe_utf8_pathname_composition()
 249#endif
 250
 251#ifdef MKDIR_WO_TRAILING_SLASH
 252#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
 253int compat_mkdir_wo_trailing_slash(const char*, mode_t);
 254#endif
 255
 256#ifdef NO_STRUCT_ITIMERVAL
 257struct itimerval {
 258        struct timeval it_interval;
 259        struct timeval it_value;
 260};
 261#endif
 262
 263#ifdef NO_SETITIMER
 264#define setitimer(which,value,ovalue)
 265#endif
 266
 267#ifndef NO_LIBGEN_H
 268#include <libgen.h>
 269#else
 270#define basename gitbasename
 271char *gitbasename(char *);
 272#define dirname gitdirname
 273char *gitdirname(char *);
 274#endif
 275
 276#ifndef NO_ICONV
 277#include <iconv.h>
 278#endif
 279
 280#ifndef NO_OPENSSL
 281#ifdef __APPLE__
 282#define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
 283#include <AvailabilityMacros.h>
 284#undef DEPRECATED_ATTRIBUTE
 285#define DEPRECATED_ATTRIBUTE
 286#undef __AVAILABILITY_MACROS_USES_AVAILABILITY
 287#endif
 288#include <openssl/ssl.h>
 289#include <openssl/err.h>
 290#endif
 291
 292#ifdef HAVE_SYSINFO
 293# include <sys/sysinfo.h>
 294#endif
 295
 296/* On most systems <netdb.h> would have given us this, but
 297 * not on some systems (e.g. z/OS).
 298 */
 299#ifndef NI_MAXHOST
 300#define NI_MAXHOST 1025
 301#endif
 302
 303#ifndef NI_MAXSERV
 304#define NI_MAXSERV 32
 305#endif
 306
 307/* On most systems <limits.h> would have given us this, but
 308 * not on some systems (e.g. GNU/Hurd).
 309 */
 310#ifndef PATH_MAX
 311#define PATH_MAX 4096
 312#endif
 313
 314#ifndef PRIuMAX
 315#define PRIuMAX "llu"
 316#endif
 317
 318#ifndef SCNuMAX
 319#define SCNuMAX PRIuMAX
 320#endif
 321
 322#ifndef PRIu32
 323#define PRIu32 "u"
 324#endif
 325
 326#ifndef PRIx32
 327#define PRIx32 "x"
 328#endif
 329
 330#ifndef PRIo32
 331#define PRIo32 "o"
 332#endif
 333
 334typedef uintmax_t timestamp_t;
 335#define PRItime PRIuMAX
 336#define parse_timestamp strtoumax
 337#define TIME_MAX UINTMAX_MAX
 338
 339#ifndef PATH_SEP
 340#define PATH_SEP ':'
 341#endif
 342
 343#ifdef HAVE_PATHS_H
 344#include <paths.h>
 345#endif
 346#ifndef _PATH_DEFPATH
 347#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
 348#endif
 349
 350#ifndef platform_core_config
 351static inline int noop_core_config(const char *var, const char *value, void *cb)
 352{
 353        return 0;
 354}
 355#define platform_core_config noop_core_config
 356#endif
 357
 358#ifndef has_dos_drive_prefix
 359static inline int git_has_dos_drive_prefix(const char *path)
 360{
 361        return 0;
 362}
 363#define has_dos_drive_prefix git_has_dos_drive_prefix
 364#endif
 365
 366#ifndef skip_dos_drive_prefix
 367static inline int git_skip_dos_drive_prefix(char **path)
 368{
 369        return 0;
 370}
 371#define skip_dos_drive_prefix git_skip_dos_drive_prefix
 372#endif
 373
 374#ifndef is_dir_sep
 375static inline int git_is_dir_sep(int c)
 376{
 377        return c == '/';
 378}
 379#define is_dir_sep git_is_dir_sep
 380#endif
 381
 382#ifndef offset_1st_component
 383static inline int git_offset_1st_component(const char *path)
 384{
 385        return is_dir_sep(path[0]);
 386}
 387#define offset_1st_component git_offset_1st_component
 388#endif
 389
 390#ifndef find_last_dir_sep
 391static inline char *git_find_last_dir_sep(const char *path)
 392{
 393        return strrchr(path, '/');
 394}
 395#define find_last_dir_sep git_find_last_dir_sep
 396#endif
 397
 398#ifndef query_user_email
 399#define query_user_email() NULL
 400#endif
 401
 402#ifdef __TANDEM
 403#include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)>
 404#include <floss.h(floss_getpwuid)>
 405#ifndef NSIG
 406/*
 407 * NonStop NSE and NSX do not provide NSIG. SIGGUARDIAN(99) is the highest
 408 * known, by detective work using kill -l as a list is all signals
 409 * instead of signal.h where it should be.
 410 */
 411# define NSIG 100
 412#endif
 413#endif
 414
 415#if defined(__HP_cc) && (__HP_cc >= 61000)
 416#define NORETURN __attribute__((noreturn))
 417#define NORETURN_PTR
 418#elif defined(__GNUC__) && !defined(NO_NORETURN)
 419#define NORETURN __attribute__((__noreturn__))
 420#define NORETURN_PTR __attribute__((__noreturn__))
 421#elif defined(_MSC_VER)
 422#define NORETURN __declspec(noreturn)
 423#define NORETURN_PTR
 424#else
 425#define NORETURN
 426#define NORETURN_PTR
 427#ifndef __GNUC__
 428#ifndef __attribute__
 429#define __attribute__(x)
 430#endif
 431#endif
 432#endif
 433
 434/* The sentinel attribute is valid from gcc version 4.0 */
 435#if defined(__GNUC__) && (__GNUC__ >= 4)
 436#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
 437#else
 438#define LAST_ARG_MUST_BE_NULL
 439#endif
 440
 441#define MAYBE_UNUSED __attribute__((__unused__))
 442
 443#include "compat/bswap.h"
 444
 445#include "wildmatch.h"
 446
 447struct strbuf;
 448
 449/* General helper functions */
 450void vreportf(const char *prefix, const char *err, va_list params);
 451NORETURN void usage(const char *err);
 452NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
 453NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
 454NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 455int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
 456int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 457void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
 458void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
 459
 460#ifndef NO_OPENSSL
 461#ifdef APPLE_COMMON_CRYPTO
 462#include "compat/apple-common-crypto.h"
 463#else
 464#include <openssl/evp.h>
 465#include <openssl/hmac.h>
 466#endif /* APPLE_COMMON_CRYPTO */
 467#include <openssl/x509v3.h>
 468#endif /* NO_OPENSSL */
 469
 470/*
 471 * Let callers be aware of the constant return value; this can help
 472 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
 473 * because some compilers may not support variadic macros. Since we're only
 474 * trying to help gcc, anyway, it's OK; other compilers will fall back to
 475 * using the function as usual.
 476 */
 477#if defined(__GNUC__)
 478static inline int const_error(void)
 479{
 480        return -1;
 481}
 482#define error(...) (error(__VA_ARGS__), const_error())
 483#define error_errno(...) (error_errno(__VA_ARGS__), const_error())
 484#endif
 485
 486void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
 487void set_error_routine(void (*routine)(const char *err, va_list params));
 488extern void (*get_error_routine(void))(const char *err, va_list params);
 489void set_warn_routine(void (*routine)(const char *warn, va_list params));
 490extern void (*get_warn_routine(void))(const char *warn, va_list params);
 491void set_die_is_recursing_routine(int (*routine)(void));
 492
 493int starts_with(const char *str, const char *prefix);
 494int istarts_with(const char *str, const char *prefix);
 495
 496/*
 497 * If the string "str" begins with the string found in "prefix", return 1.
 498 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
 499 * the string right after the prefix).
 500 *
 501 * Otherwise, return 0 and leave "out" untouched.
 502 *
 503 * Examples:
 504 *
 505 *   [extract branch name, fail if not a branch]
 506 *   if (!skip_prefix(ref, "refs/heads/", &branch)
 507 *      return -1;
 508 *
 509 *   [skip prefix if present, otherwise use whole string]
 510 *   skip_prefix(name, "refs/heads/", &name);
 511 */
 512static inline int skip_prefix(const char *str, const char *prefix,
 513                              const char **out)
 514{
 515        do {
 516                if (!*prefix) {
 517                        *out = str;
 518                        return 1;
 519                }
 520        } while (*str++ == *prefix++);
 521        return 0;
 522}
 523
 524/*
 525 * If the string "str" is the same as the string in "prefix", then the "arg"
 526 * parameter is set to the "def" parameter and 1 is returned.
 527 * If the string "str" begins with the string found in "prefix" and then a
 528 * "=" sign, then the "arg" parameter is set to "str + strlen(prefix) + 1"
 529 * (i.e., to the point in the string right after the prefix and the "=" sign),
 530 * and 1 is returned.
 531 *
 532 * Otherwise, return 0 and leave "arg" untouched.
 533 *
 534 * When we accept both a "--key" and a "--key=<val>" option, this function
 535 * can be used instead of !strcmp(arg, "--key") and then
 536 * skip_prefix(arg, "--key=", &arg) to parse such an option.
 537 */
 538int skip_to_optional_arg_default(const char *str, const char *prefix,
 539                                 const char **arg, const char *def);
 540
 541static inline int skip_to_optional_arg(const char *str, const char *prefix,
 542                                       const char **arg)
 543{
 544        return skip_to_optional_arg_default(str, prefix, arg, "");
 545}
 546
 547/*
 548 * Like skip_prefix, but promises never to read past "len" bytes of the input
 549 * buffer, and returns the remaining number of bytes in "out" via "outlen".
 550 */
 551static inline int skip_prefix_mem(const char *buf, size_t len,
 552                                  const char *prefix,
 553                                  const char **out, size_t *outlen)
 554{
 555        size_t prefix_len = strlen(prefix);
 556        if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) {
 557                *out = buf + prefix_len;
 558                *outlen = len - prefix_len;
 559                return 1;
 560        }
 561        return 0;
 562}
 563
 564/*
 565 * If buf ends with suffix, return 1 and subtract the length of the suffix
 566 * from *len. Otherwise, return 0 and leave *len untouched.
 567 */
 568static inline int strip_suffix_mem(const char *buf, size_t *len,
 569                                   const char *suffix)
 570{
 571        size_t suflen = strlen(suffix);
 572        if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
 573                return 0;
 574        *len -= suflen;
 575        return 1;
 576}
 577
 578/*
 579 * If str ends with suffix, return 1 and set *len to the size of the string
 580 * without the suffix. Otherwise, return 0 and set *len to the size of the
 581 * string.
 582 *
 583 * Note that we do _not_ NUL-terminate str to the new length.
 584 */
 585static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
 586{
 587        *len = strlen(str);
 588        return strip_suffix_mem(str, len, suffix);
 589}
 590
 591static inline int ends_with(const char *str, const char *suffix)
 592{
 593        size_t len;
 594        return strip_suffix(str, suffix, &len);
 595}
 596
 597#define SWAP(a, b) do {                                         \
 598        void *_swap_a_ptr = &(a);                               \
 599        void *_swap_b_ptr = &(b);                               \
 600        unsigned char _swap_buffer[sizeof(a)];                  \
 601        memcpy(_swap_buffer, _swap_a_ptr, sizeof(a));           \
 602        memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) +            \
 603               BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b)));   \
 604        memcpy(_swap_b_ptr, _swap_buffer, sizeof(a));           \
 605} while (0)
 606
 607#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
 608
 609#ifndef PROT_READ
 610#define PROT_READ 1
 611#define PROT_WRITE 2
 612#define MAP_PRIVATE 1
 613#endif
 614
 615#define mmap git_mmap
 616#define munmap git_munmap
 617void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 618int git_munmap(void *start, size_t length);
 619
 620#else /* NO_MMAP || USE_WIN32_MMAP */
 621
 622#include <sys/mman.h>
 623
 624#endif /* NO_MMAP || USE_WIN32_MMAP */
 625
 626#ifdef NO_MMAP
 627
 628/* This value must be multiple of (pagesize * 2) */
 629#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 630
 631#else /* NO_MMAP */
 632
 633/* This value must be multiple of (pagesize * 2) */
 634#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 635        (sizeof(void*) >= 8 \
 636                ?  1 * 1024 * 1024 * 1024 \
 637                : 32 * 1024 * 1024)
 638
 639#endif /* NO_MMAP */
 640
 641#ifndef MAP_FAILED
 642#define MAP_FAILED ((void *)-1)
 643#endif
 644
 645#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 646#define on_disk_bytes(st) ((st).st_size)
 647#else
 648#define on_disk_bytes(st) ((st).st_blocks * 512)
 649#endif
 650
 651#ifdef NEEDS_MODE_TRANSLATION
 652#undef S_IFMT
 653#undef S_IFREG
 654#undef S_IFDIR
 655#undef S_IFLNK
 656#undef S_IFBLK
 657#undef S_IFCHR
 658#undef S_IFIFO
 659#undef S_IFSOCK
 660#define S_IFMT   0170000
 661#define S_IFREG  0100000
 662#define S_IFDIR  0040000
 663#define S_IFLNK  0120000
 664#define S_IFBLK  0060000
 665#define S_IFCHR  0020000
 666#define S_IFIFO  0010000
 667#define S_IFSOCK 0140000
 668#ifdef stat
 669#undef stat
 670#endif
 671#define stat(path, buf) git_stat(path, buf)
 672int git_stat(const char *, struct stat *);
 673#ifdef fstat
 674#undef fstat
 675#endif
 676#define fstat(fd, buf) git_fstat(fd, buf)
 677int git_fstat(int, struct stat *);
 678#ifdef lstat
 679#undef lstat
 680#endif
 681#define lstat(path, buf) git_lstat(path, buf)
 682int git_lstat(const char *, struct stat *);
 683#endif
 684
 685#define DEFAULT_PACKED_GIT_LIMIT \
 686        ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256))
 687
 688#ifdef NO_PREAD
 689#define pread git_pread
 690ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 691#endif
 692/*
 693 * Forward decl that will remind us if its twin in cache.h changes.
 694 * This function is used in compat/pread.c.  But we can't include
 695 * cache.h there.
 696 */
 697ssize_t read_in_full(int fd, void *buf, size_t count);
 698
 699#ifdef NO_SETENV
 700#define setenv gitsetenv
 701int gitsetenv(const char *, const char *, int);
 702#endif
 703
 704#ifdef NO_MKDTEMP
 705#define mkdtemp gitmkdtemp
 706char *gitmkdtemp(char *);
 707#endif
 708
 709#ifdef NO_UNSETENV
 710#define unsetenv gitunsetenv
 711void gitunsetenv(const char *);
 712#endif
 713
 714#ifdef NO_STRCASESTR
 715#define strcasestr gitstrcasestr
 716char *gitstrcasestr(const char *haystack, const char *needle);
 717#endif
 718
 719#ifdef NO_STRLCPY
 720#define strlcpy gitstrlcpy
 721size_t gitstrlcpy(char *, const char *, size_t);
 722#endif
 723
 724#ifdef NO_STRTOUMAX
 725#define strtoumax gitstrtoumax
 726uintmax_t gitstrtoumax(const char *, char **, int);
 727#define strtoimax gitstrtoimax
 728intmax_t gitstrtoimax(const char *, char **, int);
 729#endif
 730
 731#ifdef NO_HSTRERROR
 732#define hstrerror githstrerror
 733const char *githstrerror(int herror);
 734#endif
 735
 736#ifdef NO_MEMMEM
 737#define memmem gitmemmem
 738void *gitmemmem(const void *haystack, size_t haystacklen,
 739                const void *needle, size_t needlelen);
 740#endif
 741
 742#ifdef OVERRIDE_STRDUP
 743#ifdef strdup
 744#undef strdup
 745#endif
 746#define strdup gitstrdup
 747char *gitstrdup(const char *s);
 748#endif
 749
 750#ifdef NO_GETPAGESIZE
 751#define getpagesize() sysconf(_SC_PAGESIZE)
 752#endif
 753
 754#ifndef O_CLOEXEC
 755#define O_CLOEXEC 0
 756#endif
 757
 758#ifdef FREAD_READS_DIRECTORIES
 759# if !defined(SUPPRESS_FOPEN_REDEFINITION)
 760#  ifdef fopen
 761#   undef fopen
 762#  endif
 763#  define fopen(a,b) git_fopen(a,b)
 764# endif
 765FILE *git_fopen(const char*, const char*);
 766#endif
 767
 768#ifdef SNPRINTF_RETURNS_BOGUS
 769#ifdef snprintf
 770#undef snprintf
 771#endif
 772#define snprintf git_snprintf
 773int git_snprintf(char *str, size_t maxsize,
 774                 const char *format, ...);
 775#ifdef vsnprintf
 776#undef vsnprintf
 777#endif
 778#define vsnprintf git_vsnprintf
 779int git_vsnprintf(char *str, size_t maxsize,
 780                  const char *format, va_list ap);
 781#endif
 782
 783#ifdef __GLIBC_PREREQ
 784#if __GLIBC_PREREQ(2, 1)
 785#define HAVE_STRCHRNUL
 786#endif
 787#endif
 788
 789#ifndef HAVE_STRCHRNUL
 790#define strchrnul gitstrchrnul
 791static inline char *gitstrchrnul(const char *s, int c)
 792{
 793        while (*s && *s != c)
 794                s++;
 795        return (char *)s;
 796}
 797#endif
 798
 799#ifdef NO_INET_PTON
 800int inet_pton(int af, const char *src, void *dst);
 801#endif
 802
 803#ifdef NO_INET_NTOP
 804const char *inet_ntop(int af, const void *src, char *dst, size_t size);
 805#endif
 806
 807#ifdef NO_PTHREADS
 808#define atexit git_atexit
 809int git_atexit(void (*handler)(void));
 810#endif
 811
 812typedef void (*try_to_free_t)(size_t);
 813try_to_free_t set_try_to_free_routine(try_to_free_t);
 814
 815static inline size_t st_add(size_t a, size_t b)
 816{
 817        if (unsigned_add_overflows(a, b))
 818                die("size_t overflow: %"PRIuMAX" + %"PRIuMAX,
 819                    (uintmax_t)a, (uintmax_t)b);
 820        return a + b;
 821}
 822#define st_add3(a,b,c)   st_add(st_add((a),(b)),(c))
 823#define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d))
 824
 825static inline size_t st_mult(size_t a, size_t b)
 826{
 827        if (unsigned_mult_overflows(a, b))
 828                die("size_t overflow: %"PRIuMAX" * %"PRIuMAX,
 829                    (uintmax_t)a, (uintmax_t)b);
 830        return a * b;
 831}
 832
 833static inline size_t st_sub(size_t a, size_t b)
 834{
 835        if (a < b)
 836                die("size_t underflow: %"PRIuMAX" - %"PRIuMAX,
 837                    (uintmax_t)a, (uintmax_t)b);
 838        return a - b;
 839}
 840
 841#ifdef HAVE_ALLOCA_H
 842# include <alloca.h>
 843# define xalloca(size)      (alloca(size))
 844# define xalloca_free(p)    do {} while (0)
 845#else
 846# define xalloca(size)      (xmalloc(size))
 847# define xalloca_free(p)    (free(p))
 848#endif
 849char *xstrdup(const char *str);
 850void *xmalloc(size_t size);
 851void *xmallocz(size_t size);
 852void *xmallocz_gently(size_t size);
 853void *xmemdupz(const void *data, size_t len);
 854char *xstrndup(const char *str, size_t len);
 855void *xrealloc(void *ptr, size_t size);
 856void *xcalloc(size_t nmemb, size_t size);
 857void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 858void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 859int xopen(const char *path, int flags, ...);
 860ssize_t xread(int fd, void *buf, size_t len);
 861ssize_t xwrite(int fd, const void *buf, size_t len);
 862ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
 863int xdup(int fd);
 864FILE *xfopen(const char *path, const char *mode);
 865FILE *xfdopen(int fd, const char *mode);
 866int xmkstemp(char *temp_filename);
 867int xmkstemp_mode(char *temp_filename, int mode);
 868char *xgetcwd(void);
 869FILE *fopen_for_writing(const char *path);
 870FILE *fopen_or_warn(const char *path, const char *mode);
 871
 872/*
 873 * FREE_AND_NULL(ptr) is like free(ptr) followed by ptr = NULL. Note
 874 * that ptr is used twice, so don't pass e.g. ptr++.
 875 */
 876#define FREE_AND_NULL(p) do { free(p); (p) = NULL; } while (0)
 877
 878#define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc)))
 879#define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x)));
 880#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc)))
 881
 882#define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \
 883        BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src))))
 884static inline void copy_array(void *dst, const void *src, size_t n, size_t size)
 885{
 886        if (n)
 887                memcpy(dst, src, st_mult(size, n));
 888}
 889
 890#define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \
 891        BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src))))
 892static inline void move_array(void *dst, const void *src, size_t n, size_t size)
 893{
 894        if (n)
 895                memmove(dst, src, st_mult(size, n));
 896}
 897
 898/*
 899 * These functions help you allocate structs with flex arrays, and copy
 900 * the data directly into the array. For example, if you had:
 901 *
 902 *   struct foo {
 903 *     int bar;
 904 *     char name[FLEX_ARRAY];
 905 *   };
 906 *
 907 * you can do:
 908 *
 909 *   struct foo *f;
 910 *   FLEX_ALLOC_MEM(f, name, src, len);
 911 *
 912 * to allocate a "foo" with the contents of "src" in the "name" field.
 913 * The resulting struct is automatically zero'd, and the flex-array field
 914 * is NUL-terminated (whether the incoming src buffer was or not).
 915 *
 916 * The FLEXPTR_* variants operate on structs that don't use flex-arrays,
 917 * but do want to store a pointer to some extra data in the same allocated
 918 * block. For example, if you have:
 919 *
 920 *   struct foo {
 921 *     char *name;
 922 *     int bar;
 923 *   };
 924 *
 925 * you can do:
 926 *
 927 *   struct foo *f;
 928 *   FLEXPTR_ALLOC_STR(f, name, src);
 929 *
 930 * and "name" will point to a block of memory after the struct, which will be
 931 * freed along with the struct (but the pointer can be repointed anywhere).
 932 *
 933 * The *_STR variants accept a string parameter rather than a ptr/len
 934 * combination.
 935 *
 936 * Note that these macros will evaluate the first parameter multiple
 937 * times, and it must be assignable as an lvalue.
 938 */
 939#define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \
 940        size_t flex_array_len_ = (len); \
 941        (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \
 942        memcpy((void *)(x)->flexname, (buf), flex_array_len_); \
 943} while (0)
 944#define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \
 945        size_t flex_array_len_ = (len); \
 946        (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \
 947        memcpy((x) + 1, (buf), flex_array_len_); \
 948        (x)->ptrname = (void *)((x)+1); \
 949} while(0)
 950#define FLEX_ALLOC_STR(x, flexname, str) \
 951        FLEX_ALLOC_MEM((x), flexname, (str), strlen(str))
 952#define FLEXPTR_ALLOC_STR(x, ptrname, str) \
 953        FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str))
 954
 955static inline char *xstrdup_or_null(const char *str)
 956{
 957        return str ? xstrdup(str) : NULL;
 958}
 959
 960static inline size_t xsize_t(off_t len)
 961{
 962        size_t size = (size_t) len;
 963
 964        if (len != (off_t) size)
 965                die("Cannot handle files this big");
 966        return size;
 967}
 968
 969__attribute__((format (printf, 3, 4)))
 970int xsnprintf(char *dst, size_t max, const char *fmt, ...);
 971
 972#ifndef HOST_NAME_MAX
 973#define HOST_NAME_MAX 256
 974#endif
 975
 976int xgethostname(char *buf, size_t len);
 977
 978/* in ctype.c, for kwset users */
 979extern const unsigned char tolower_trans_tbl[256];
 980
 981/* Sane ctype - no locale, and works with signed chars */
 982#undef isascii
 983#undef isspace
 984#undef isdigit
 985#undef isalpha
 986#undef isalnum
 987#undef isprint
 988#undef islower
 989#undef isupper
 990#undef tolower
 991#undef toupper
 992#undef iscntrl
 993#undef ispunct
 994#undef isxdigit
 995
 996extern const unsigned char sane_ctype[256];
 997#define GIT_SPACE 0x01
 998#define GIT_DIGIT 0x02
 999#define GIT_ALPHA 0x04
1000#define GIT_GLOB_SPECIAL 0x08
1001#define GIT_REGEX_SPECIAL 0x10
1002#define GIT_PATHSPEC_MAGIC 0x20
1003#define GIT_CNTRL 0x40
1004#define GIT_PUNCT 0x80
1005#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
1006#define isascii(x) (((x) & ~0x7f) == 0)
1007#define isspace(x) sane_istest(x,GIT_SPACE)
1008#define isdigit(x) sane_istest(x,GIT_DIGIT)
1009#define isalpha(x) sane_istest(x,GIT_ALPHA)
1010#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
1011#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
1012#define islower(x) sane_iscase(x, 1)
1013#define isupper(x) sane_iscase(x, 0)
1014#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
1015#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
1016#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
1017#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
1018                GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
1019#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
1020#define tolower(x) sane_case((unsigned char)(x), 0x20)
1021#define toupper(x) sane_case((unsigned char)(x), 0)
1022#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
1023
1024static inline int sane_case(int x, int high)
1025{
1026        if (sane_istest(x, GIT_ALPHA))
1027                x = (x & ~0x20) | high;
1028        return x;
1029}
1030
1031static inline int sane_iscase(int x, int is_lower)
1032{
1033        if (!sane_istest(x, GIT_ALPHA))
1034                return 0;
1035
1036        if (is_lower)
1037                return (x & 0x20) != 0;
1038        else
1039                return (x & 0x20) == 0;
1040}
1041
1042/*
1043 * Like skip_prefix, but compare case-insensitively. Note that the comparison
1044 * is done via tolower(), so it is strictly ASCII (no multi-byte characters or
1045 * locale-specific conversions).
1046 */
1047static inline int skip_iprefix(const char *str, const char *prefix,
1048                               const char **out)
1049{
1050        do {
1051                if (!*prefix) {
1052                        *out = str;
1053                        return 1;
1054                }
1055        } while (tolower(*str++) == tolower(*prefix++));
1056        return 0;
1057}
1058
1059static inline int strtoul_ui(char const *s, int base, unsigned int *result)
1060{
1061        unsigned long ul;
1062        char *p;
1063
1064        errno = 0;
1065        /* negative values would be accepted by strtoul */
1066        if (strchr(s, '-'))
1067                return -1;
1068        ul = strtoul(s, &p, base);
1069        if (errno || *p || p == s || (unsigned int) ul != ul)
1070                return -1;
1071        *result = ul;
1072        return 0;
1073}
1074
1075static inline int strtol_i(char const *s, int base, int *result)
1076{
1077        long ul;
1078        char *p;
1079
1080        errno = 0;
1081        ul = strtol(s, &p, base);
1082        if (errno || *p || p == s || (int) ul != ul)
1083                return -1;
1084        *result = ul;
1085        return 0;
1086}
1087
1088#ifdef INTERNAL_QSORT
1089void git_qsort(void *base, size_t nmemb, size_t size,
1090               int(*compar)(const void *, const void *));
1091#define qsort git_qsort
1092#endif
1093
1094#define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar)
1095static inline void sane_qsort(void *base, size_t nmemb, size_t size,
1096                              int(*compar)(const void *, const void *))
1097{
1098        if (nmemb > 1)
1099                qsort(base, nmemb, size, compar);
1100}
1101
1102#ifndef HAVE_ISO_QSORT_S
1103int git_qsort_s(void *base, size_t nmemb, size_t size,
1104                int (*compar)(const void *, const void *, void *), void *ctx);
1105#define qsort_s git_qsort_s
1106#endif
1107
1108#define QSORT_S(base, n, compar, ctx) do {                      \
1109        if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \
1110                BUG("qsort_s() failed");                        \
1111} while (0)
1112
1113#ifndef REG_STARTEND
1114#error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd"
1115#endif
1116
1117static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size,
1118                              size_t nmatch, regmatch_t pmatch[], int eflags)
1119{
1120        assert(nmatch > 0 && pmatch);
1121        pmatch[0].rm_so = 0;
1122        pmatch[0].rm_eo = size;
1123        return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND);
1124}
1125
1126#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
1127# define FORCE_DIR_SET_GID S_ISGID
1128#else
1129# define FORCE_DIR_SET_GID 0
1130#endif
1131
1132#ifdef NO_NSEC
1133#undef USE_NSEC
1134#define ST_CTIME_NSEC(st) 0
1135#define ST_MTIME_NSEC(st) 0
1136#else
1137#ifdef USE_ST_TIMESPEC
1138#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
1139#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
1140#else
1141#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
1142#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
1143#endif
1144#endif
1145
1146#ifdef UNRELIABLE_FSTAT
1147#define fstat_is_reliable() 0
1148#else
1149#define fstat_is_reliable() 1
1150#endif
1151
1152#ifndef va_copy
1153/*
1154 * Since an obvious implementation of va_list would be to make it a
1155 * pointer into the stack frame, a simple assignment will work on
1156 * many systems.  But let's try to be more portable.
1157 */
1158#ifdef __va_copy
1159#define va_copy(dst, src) __va_copy(dst, src)
1160#else
1161#define va_copy(dst, src) ((dst) = (src))
1162#endif
1163#endif
1164
1165#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
1166#define HAVE_VARIADIC_MACROS 1
1167#endif
1168
1169/* usage.c: only to be used for testing BUG() implementation (see test-tool) */
1170extern int BUG_exit_code;
1171
1172#ifdef HAVE_VARIADIC_MACROS
1173__attribute__((format (printf, 3, 4))) NORETURN
1174void BUG_fl(const char *file, int line, const char *fmt, ...);
1175#define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__)
1176#else
1177__attribute__((format (printf, 1, 2))) NORETURN
1178void BUG(const char *fmt, ...);
1179#endif
1180
1181/*
1182 * Preserves errno, prints a message, but gives no warning for ENOENT.
1183 * Returns 0 on success, which includes trying to unlink an object that does
1184 * not exist.
1185 */
1186int unlink_or_warn(const char *path);
1187 /*
1188  * Tries to unlink file.  Returns 0 if unlink succeeded
1189  * or the file already didn't exist.  Returns -1 and
1190  * appends a message to err suitable for
1191  * 'error("%s", err->buf)' on error.
1192  */
1193int unlink_or_msg(const char *file, struct strbuf *err);
1194/*
1195 * Preserves errno, prints a message, but gives no warning for ENOENT.
1196 * Returns 0 on success, which includes trying to remove a directory that does
1197 * not exist.
1198 */
1199int rmdir_or_warn(const char *path);
1200/*
1201 * Calls the correct function out of {unlink,rmdir}_or_warn based on
1202 * the supplied file mode.
1203 */
1204int remove_or_warn(unsigned int mode, const char *path);
1205
1206/*
1207 * Call access(2), but warn for any error except "missing file"
1208 * (ENOENT or ENOTDIR).
1209 */
1210#define ACCESS_EACCES_OK (1U << 0)
1211int access_or_warn(const char *path, int mode, unsigned flag);
1212int access_or_die(const char *path, int mode, unsigned flag);
1213
1214/* Warn on an inaccessible file if errno indicates this is an error */
1215int warn_on_fopen_errors(const char *path);
1216
1217#ifdef GMTIME_UNRELIABLE_ERRORS
1218struct tm *git_gmtime(const time_t *);
1219struct tm *git_gmtime_r(const time_t *, struct tm *);
1220#define gmtime git_gmtime
1221#define gmtime_r git_gmtime_r
1222#endif
1223
1224#if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__)
1225#define USE_PARENS_AROUND_GETTEXT_N 1
1226#endif
1227
1228#ifndef SHELL_PATH
1229# define SHELL_PATH "/bin/sh"
1230#endif
1231
1232#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
1233#define flockfile(fh)
1234#define funlockfile(fh)
1235#define getc_unlocked(fh) getc(fh)
1236#endif
1237
1238#ifdef FILENO_IS_A_MACRO
1239int git_fileno(FILE *stream);
1240# ifndef COMPAT_CODE_FILENO
1241#  undef fileno
1242#  define fileno(p) git_fileno(p)
1243# endif
1244#endif
1245
1246#ifdef NEED_ACCESS_ROOT_HANDLER
1247int git_access(const char *path, int mode);
1248# ifndef COMPAT_CODE_ACCESS
1249#  ifdef access
1250#  undef access
1251#  endif
1252#  define access(path, mode) git_access(path, mode)
1253# endif
1254#endif
1255
1256/*
1257 * Our code often opens a path to an optional file, to work on its
1258 * contents when we can successfully open it.  We can ignore a failure
1259 * to open if such an optional file does not exist, but we do want to
1260 * report a failure in opening for other reasons (e.g. we got an I/O
1261 * error, or the file is there, but we lack the permission to open).
1262 *
1263 * Call this function after seeing an error from open() or fopen() to
1264 * see if the errno indicates a missing file that we can safely ignore.
1265 */
1266static inline int is_missing_file_error(int errno_)
1267{
1268        return (errno_ == ENOENT || errno_ == ENOTDIR);
1269}
1270
1271int cmd_main(int, const char **);
1272
1273/*
1274 * Intercept all calls to exit() and route them to trace2 to
1275 * optionally emit a message before calling the real exit().
1276 */
1277int trace2_cmd_exit_fl(const char *file, int line, int code);
1278#define exit(code) exit(trace2_cmd_exit_fl(__FILE__, __LINE__, (code)))
1279
1280/*
1281 * You can mark a stack variable with UNLEAK(var) to avoid it being
1282 * reported as a leak by tools like LSAN or valgrind. The argument
1283 * should generally be the variable itself (not its address and not what
1284 * it points to). It's safe to use this on pointers which may already
1285 * have been freed, or on pointers which may still be in use.
1286 *
1287 * Use this _only_ for a variable that leaks by going out of scope at
1288 * program exit (so only from cmd_* functions or their direct helpers).
1289 * Normal functions, especially those which may be called multiple
1290 * times, should actually free their memory. This is only meant as
1291 * an annotation, and does nothing in non-leak-checking builds.
1292 */
1293#ifdef SUPPRESS_ANNOTATED_LEAKS
1294void unleak_memory(const void *ptr, size_t len);
1295#define UNLEAK(var) unleak_memory(&(var), sizeof(var))
1296#else
1297#define UNLEAK(var) do {} while (0)
1298#endif
1299
1300/*
1301 * This include must come after system headers, since it introduces macros that
1302 * replace system names.
1303 */
1304#include "banned.h"
1305
1306#endif