| #ifndef GIT_COMPAT_UTIL_H |
| #define GIT_COMPAT_UTIL_H |
| |
| #if __STDC_VERSION__ - 0 < 199901L |
| /* |
| * Git is in a testing period for mandatory C99 support in the compiler. If |
| * your compiler is reasonably recent, you can try to enable C99 support (or, |
| * for MSVC, C11 support). If you encounter a problem and can't enable C99 |
| * support with your compiler (such as with "-std=gnu99") and don't have access |
| * to one with this support, such as GCC or Clang, you can remove this #if |
| * directive, but please report the details of your system to |
| * git@vger.kernel.org. |
| */ |
| #error "Required C99 support is in a test phase. Please see git-compat-util.h for more details." |
| #endif |
| |
| #ifdef USE_MSVC_CRTDBG |
| /* |
| * For these to work they must appear very early in each |
| * file -- before most of the standard header files. |
| */ |
| #include <stdlib.h> |
| #include <crtdbg.h> |
| #endif |
| |
| struct strbuf; |
| |
| |
| #define _FILE_OFFSET_BITS 64 |
| |
| |
| /* Derived from Linux "Features Test Macro" header |
| * Convenience macros to test the versions of gcc (or |
| * a compatible compiler). |
| * Use them like this: |
| * #if GIT_GNUC_PREREQ (2,8) |
| * ... code requiring gcc 2.8 or later ... |
| * #endif |
| */ |
| #if defined(__GNUC__) && defined(__GNUC_MINOR__) |
| # define GIT_GNUC_PREREQ(maj, min) \ |
| ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
| #else |
| #define GIT_GNUC_PREREQ(maj, min) 0 |
| #endif |
| |
| |
| #ifndef FLEX_ARRAY |
| /* |
| * See if our compiler is known to support flexible array members. |
| */ |
| |
| /* |
| * Check vendor specific quirks first, before checking the |
| * __STDC_VERSION__, as vendor compilers can lie and we need to be |
| * able to work them around. Note that by not defining FLEX_ARRAY |
| * here, we can fall back to use the "safer but a bit wasteful" one |
| * later. |
| */ |
| #if defined(__SUNPRO_C) && (__SUNPRO_C <= 0x580) |
| #elif defined(__GNUC__) |
| # if (__GNUC__ >= 3) |
| # define FLEX_ARRAY /* empty */ |
| # else |
| # define FLEX_ARRAY 0 /* older GNU extension */ |
| # endif |
| #elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) |
| # define FLEX_ARRAY /* empty */ |
| #endif |
| |
| /* |
| * Otherwise, default to safer but a bit wasteful traditional style |
| */ |
| #ifndef FLEX_ARRAY |
| # define FLEX_ARRAY 1 |
| #endif |
| #endif |
| |
| |
| /* |
| * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression. |
| * @cond: the compile-time condition which must be true. |
| * |
| * Your compile will fail if the condition isn't true, or can't be evaluated |
| * by the compiler. This can be used in an expression: its value is "0". |
| * |
| * Example: |
| * #define foo_to_char(foo) \ |
| * ((char *)(foo) \ |
| * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0)) |
| */ |
| #define BUILD_ASSERT_OR_ZERO(cond) \ |
| (sizeof(char [1 - 2*!(cond)]) - 1) |
| |
| #if GIT_GNUC_PREREQ(3, 1) |
| /* &arr[0] degrades to a pointer: a different type from an array */ |
| # define BARF_UNLESS_AN_ARRAY(arr) \ |
| BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ |
| __typeof__(&(arr)[0]))) |
| # define BARF_UNLESS_COPYABLE(dst, src) \ |
| BUILD_ASSERT_OR_ZERO(__builtin_types_compatible_p(__typeof__(*(dst)), \ |
| __typeof__(*(src)))) |
| #else |
| # define BARF_UNLESS_AN_ARRAY(arr) 0 |
| # define BARF_UNLESS_COPYABLE(dst, src) \ |
| BUILD_ASSERT_OR_ZERO(0 ? ((*(dst) = *(src)), 0) : \ |
| sizeof(*(dst)) == sizeof(*(src))) |
| #endif |
| /* |
| * ARRAY_SIZE - get the number of elements in a visible array |
| * @x: the array whose size you want. |
| * |
| * This does not work on pointers, or arrays declared as [], or |
| * function parameters. With correct compiler support, such usage |
| * will cause a build error (see the build_assert_or_zero macro). |
| */ |
| #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x)) |
| |
| #define bitsizeof(x) (CHAR_BIT * sizeof(x)) |
| |
| #define maximum_signed_value_of_type(a) \ |
| (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) |
| |
| #define maximum_unsigned_value_of_type(a) \ |
| (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) |
| |
| /* |
| * Signed integer overflow is undefined in C, so here's a helper macro |
| * to detect if the sum of two integers will overflow. |
| * |
| * Requires: a >= 0, typeof(a) equals typeof(b) |
| */ |
| #define signed_add_overflows(a, b) \ |
| ((b) > maximum_signed_value_of_type(a) - (a)) |
| |
| #define unsigned_add_overflows(a, b) \ |
| ((b) > maximum_unsigned_value_of_type(a) - (a)) |
| |
| /* |
| * Returns true if the multiplication of "a" and "b" will |
| * overflow. The types of "a" and "b" must match and must be unsigned. |
| * Note that this macro evaluates "a" twice! |
| */ |
| #define unsigned_mult_overflows(a, b) \ |
| ((a) && (b) > maximum_unsigned_value_of_type(a) / (a)) |
| |
| /* |
| * Returns true if the left shift of "a" by "shift" bits will |
| * overflow. The type of "a" must be unsigned. |
| */ |
| #define unsigned_left_shift_overflows(a, shift) \ |
| ((shift) < bitsizeof(a) && \ |
| (a) > maximum_unsigned_value_of_type(a) >> (shift)) |
| |
| #ifdef __GNUC__ |
| #define TYPEOF(x) (__typeof__(x)) |
| #else |
| #define TYPEOF(x) |
| #endif |
| |
| #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) |
| #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ |
| |
| #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
| |
| /* Approximation of the length of the decimal representation of this type. */ |
| #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) |
| |
| #ifdef __MINGW64__ |
| #define _POSIX_C_SOURCE 1 |
| #elif defined(__sun__) |
| /* |
| * On Solaris, when _XOPEN_EXTENDED is set, its header file |
| * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE |
| * setting to say we are XPG5 or XPG6. Also on Solaris, |
| * XPG6 programs must be compiled with a c99 compiler, while |
| * non XPG6 programs must be compiled with a pre-c99 compiler. |
| */ |
| # if __STDC_VERSION__ - 0 >= 199901L |
| # define _XOPEN_SOURCE 600 |
| # else |
| # define _XOPEN_SOURCE 500 |
| # endif |
| #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ |
| !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ |
| !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ |
| !defined(__CYGWIN__) |
| #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
| #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ |
| #endif |
| #define _ALL_SOURCE 1 |
| #define _GNU_SOURCE 1 |
| #define _BSD_SOURCE 1 |
| #define _DEFAULT_SOURCE 1 |
| #define _NETBSD_SOURCE 1 |
| #define _SGI_SOURCE 1 |
| |
| #if GIT_GNUC_PREREQ(4, 5) |
| #define UNUSED __attribute__((unused)) \ |
| __attribute__((deprecated ("parameter declared as UNUSED"))) |
| #elif defined(__GNUC__) |
| #define UNUSED __attribute__((unused)) \ |
| __attribute__((deprecated)) |
| #else |
| #define UNUSED |
| #endif |
| |
| #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ |
| # if !defined(_WIN32_WINNT) |
| # define _WIN32_WINNT 0x0600 |
| # endif |
| #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ |
| #include <winsock2.h> |
| #ifndef NO_UNIX_SOCKETS |
| #include <afunix.h> |
| #endif |
| #include <windows.h> |
| #define GIT_WINDOWS_NATIVE |
| #endif |
| |
| #if defined(NO_UNIX_SOCKETS) || !defined(GIT_WINDOWS_NATIVE) |
| static inline int _have_unix_sockets(void) |
| { |
| #if defined(NO_UNIX_SOCKETS) |
| return 0; |
| #else |
| return 1; |
| #endif |
| } |
| #define have_unix_sockets _have_unix_sockets |
| #endif |
| |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <string.h> |
| #ifdef HAVE_STRINGS_H |
| #include <strings.h> /* for strcasecmp() */ |
| #endif |
| #include <errno.h> |
| #include <limits.h> |
| #include <locale.h> |
| #ifdef NEEDS_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| #include <sys/types.h> |
| #include <dirent.h> |
| #include <sys/time.h> |
| #include <time.h> |
| #include <signal.h> |
| #include <assert.h> |
| #include <regex.h> |
| #include <utime.h> |
| #include <syslog.h> |
| #if !defined(NO_POLL_H) |
| #include <poll.h> |
| #elif !defined(NO_SYS_POLL_H) |
| #include <sys/poll.h> |
| #else |
| /* Pull the compat stuff */ |
| #include <poll.h> |
| #endif |
| #ifdef HAVE_BSD_SYSCTL |
| #include <sys/sysctl.h> |
| #endif |
| |
| /* Used by compat/win32/path-utils.h, and more */ |
| static inline int is_xplatform_dir_sep(int c) |
| { |
| return c == '/' || c == '\\'; |
| } |
| |
| #if defined(__CYGWIN__) |
| #include "compat/win32/path-utils.h" |
| #endif |
| #if defined(__MINGW32__) |
| /* pull in Windows compatibility stuff */ |
| #include "compat/win32/path-utils.h" |
| #include "compat/mingw.h" |
| #elif defined(_MSC_VER) |
| #include "compat/win32/path-utils.h" |
| #include "compat/msvc.h" |
| #else |
| #include <sys/utsname.h> |
| #include <sys/wait.h> |
| #include <sys/resource.h> |
| #include <sys/socket.h> |
| #include <sys/ioctl.h> |
| #include <sys/statvfs.h> |
| #include <termios.h> |
| #ifndef NO_SYS_SELECT_H |
| #include <sys/select.h> |
| #endif |
| #include <netinet/in.h> |
| #include <netinet/tcp.h> |
| #include <arpa/inet.h> |
| #include <netdb.h> |
| #include <pwd.h> |
| #include <sys/un.h> |
| #ifndef NO_INTTYPES_H |
| #include <inttypes.h> |
| #else |
| #include <stdint.h> |
| #endif |
| #ifdef HAVE_ARC4RANDOM_LIBBSD |
| #include <bsd/stdlib.h> |
| #endif |
| #ifdef HAVE_GETRANDOM |
| #include <sys/random.h> |
| #endif |
| #ifdef NO_INTPTR_T |
| /* |
| * On I16LP32, ILP32 and LP64 "long" is the safe bet, however |
| * on LLP86, IL33LLP64 and P64 it needs to be "long long", |
| * while on IP16 and IP16L32 it is "int" (resp. "short") |
| * Size needs to match (or exceed) 'sizeof(void *)'. |
| * We can't take "long long" here as not everybody has it. |
| */ |
| typedef long intptr_t; |
| typedef unsigned long uintptr_t; |
| #endif |
| #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
| #include <grp.h> |
| #define _ALL_SOURCE 1 |
| #endif |
| |
| /* used on Mac OS X */ |
| #ifdef PRECOMPOSE_UNICODE |
| #include "compat/precompose_utf8.h" |
| #else |
| static inline const char *precompose_argv_prefix(int argc UNUSED, |
| const char **argv UNUSED, |
| const char *prefix) |
| { |
| return prefix; |
| } |
| static inline const char *precompose_string_if_needed(const char *in) |
| { |
| return in; |
| } |
| |
| #define probe_utf8_pathname_composition() |
| #endif |
| |
| #ifdef MKDIR_WO_TRAILING_SLASH |
| #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) |
| int compat_mkdir_wo_trailing_slash(const char*, mode_t); |
| #endif |
| |
| #ifdef time |
| #undef time |
| #endif |
| static inline time_t git_time(time_t *tloc) |
| { |
| struct timeval tv; |
| |
| /* |
| * Avoid time(NULL), which can disagree with gettimeofday(2) |
| * and filesystem timestamps. |
| */ |
| gettimeofday(&tv, NULL); |
| |
| if (tloc) |
| *tloc = tv.tv_sec; |
| return tv.tv_sec; |
| } |
| #define time git_time |
| |
| #ifdef NO_STRUCT_ITIMERVAL |
| struct itimerval { |
| struct timeval it_interval; |
| struct timeval it_value; |
| }; |
| #endif |
| |
| #ifdef NO_SETITIMER |
| static inline int git_setitimer(int which UNUSED, |
| const struct itimerval *value UNUSED, |
| struct itimerval *newvalue UNUSED) { |
| return 0; /* pretend success */ |
| } |
| #undef setitimer |
| #define setitimer(which,value,ovalue) git_setitimer(which,value,ovalue) |
| #endif |
| |
| #ifndef NO_LIBGEN_H |
| #include <libgen.h> |
| #else |
| #define basename gitbasename |
| char *gitbasename(char *); |
| #define dirname gitdirname |
| char *gitdirname(char *); |
| #endif |
| |
| #ifndef NO_ICONV |
| #include <iconv.h> |
| #endif |
| |
| #ifndef NO_OPENSSL |
| #ifdef __APPLE__ |
| #undef __AVAILABILITY_MACROS_USES_AVAILABILITY |
| #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 |
| #include <AvailabilityMacros.h> |
| #undef DEPRECATED_ATTRIBUTE |
| #define DEPRECATED_ATTRIBUTE |
| #undef __AVAILABILITY_MACROS_USES_AVAILABILITY |
| #endif |
| #include <openssl/ssl.h> |
| #include <openssl/err.h> |
| #endif |
| |
| #ifdef HAVE_SYSINFO |
| # include <sys/sysinfo.h> |
| #endif |
| |
| /* On most systems <netdb.h> would have given us this, but |
| * not on some systems (e.g. z/OS). |
| */ |
| #ifndef NI_MAXHOST |
| #define NI_MAXHOST 1025 |
| #endif |
| |
| #ifndef NI_MAXSERV |
| #define NI_MAXSERV 32 |
| #endif |
| |
| /* On most systems <limits.h> would have given us this, but |
| * not on some systems (e.g. GNU/Hurd). |
| */ |
| #ifndef PATH_MAX |
| #define PATH_MAX 4096 |
| #endif |
| |
| #ifndef NAME_MAX |
| #define NAME_MAX 255 |
| #endif |
| |
| typedef uintmax_t timestamp_t; |
| #define PRItime PRIuMAX |
| #define parse_timestamp strtoumax |
| #define TIME_MAX UINTMAX_MAX |
| #define TIME_MIN 0 |
| |
| #ifndef PATH_SEP |
| #define PATH_SEP ':' |
| #endif |
| |
| #ifdef HAVE_PATHS_H |
| #include <paths.h> |
| #endif |
| #ifndef _PATH_DEFPATH |
| #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" |
| #endif |
| |
| #ifndef platform_core_config |
| struct config_context; |
| static inline int noop_core_config(const char *var UNUSED, |
| const char *value UNUSED, |
| const struct config_context *ctx UNUSED, |
| void *cb UNUSED) |
| { |
| return 0; |
| } |
| #define platform_core_config noop_core_config |
| #endif |
| |
| int lstat_cache_aware_rmdir(const char *path); |
| #if !defined(__MINGW32__) && !defined(_MSC_VER) |
| #define rmdir lstat_cache_aware_rmdir |
| #endif |
| |
| #ifndef has_dos_drive_prefix |
| static inline int git_has_dos_drive_prefix(const char *path UNUSED) |
| { |
| return 0; |
| } |
| #define has_dos_drive_prefix git_has_dos_drive_prefix |
| #endif |
| |
| #ifndef skip_dos_drive_prefix |
| static inline int git_skip_dos_drive_prefix(char **path UNUSED) |
| { |
| return 0; |
| } |
| #define skip_dos_drive_prefix git_skip_dos_drive_prefix |
| #endif |
| |
| static inline int git_is_dir_sep(int c) |
| { |
| return c == '/'; |
| } |
| #ifndef is_dir_sep |
| #define is_dir_sep git_is_dir_sep |
| #endif |
| |
| #ifndef offset_1st_component |
| static inline int git_offset_1st_component(const char *path) |
| { |
| return is_dir_sep(path[0]); |
| } |
| #define offset_1st_component git_offset_1st_component |
| #endif |
| |
| #ifndef is_valid_path |
| #define is_valid_path(path) 1 |
| #endif |
| |
| #ifndef is_path_owned_by_current_user |
| |
| #ifdef __TANDEM |
| #define ROOT_UID 65535 |
| #else |
| #define ROOT_UID 0 |
| #endif |
| |
| /* |
| * Do not use this function when |
| * (1) geteuid() did not say we are running as 'root', or |
| * (2) using this function will compromise the system. |
| * |
| * PORTABILITY WARNING: |
| * This code assumes uid_t is unsigned because that is what sudo does. |
| * If your uid_t type is signed and all your ids are positive then it |
| * should all work fine. |
| * If your version of sudo uses negative values for uid_t or it is |
| * buggy and return an overflowed value in SUDO_UID, then git might |
| * fail to grant access to your repository properly or even mistakenly |
| * grant access to someone else. |
| * In the unlikely scenario this happened to you, and that is how you |
| * got to this message, we would like to know about it; so sent us an |
| * email to git@vger.kernel.org indicating which platform you are |
| * using and which version of sudo, so we can improve this logic and |
| * maybe provide you with a patch that would prevent this issue again |
| * in the future. |
| */ |
| static inline void extract_id_from_env(const char *env, uid_t *id) |
| { |
| const char *real_uid = getenv(env); |
| |
| /* discard anything empty to avoid a more complex check below */ |
| if (real_uid && *real_uid) { |
| char *endptr = NULL; |
| unsigned long env_id; |
| |
| errno = 0; |
| /* silent overflow errors could trigger a bug here */ |
| env_id = strtoul(real_uid, &endptr, 10); |
| if (!*endptr && !errno) |
| *id = env_id; |
| } |
| } |
| |
| static inline int is_path_owned_by_current_uid(const char *path, |
| struct strbuf *report UNUSED) |
| { |
| struct stat st; |
| uid_t euid; |
| |
| if (lstat(path, &st)) |
| return 0; |
| |
| euid = geteuid(); |
| if (euid == ROOT_UID) |
| { |
| if (st.st_uid == ROOT_UID) |
| return 1; |
| else |
| extract_id_from_env("SUDO_UID", &euid); |
| } |
| |
| return st.st_uid == euid; |
| } |
| |
| #define is_path_owned_by_current_user is_path_owned_by_current_uid |
| #endif |
| |
| #ifndef find_last_dir_sep |
| static inline char *git_find_last_dir_sep(const char *path) |
| { |
| return strrchr(path, '/'); |
| } |
| #define find_last_dir_sep git_find_last_dir_sep |
| #endif |
| |
| #ifndef has_dir_sep |
| static inline int git_has_dir_sep(const char *path) |
| { |
| return !!strchr(path, '/'); |
| } |
| #define has_dir_sep(path) git_has_dir_sep(path) |
| #endif |
| |
| #ifndef query_user_email |
| #define query_user_email() NULL |
| #endif |
| |
| #ifdef __TANDEM |
| #include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)> |
| #include <floss.h(floss_getpwuid)> |
| #ifndef NSIG |
| /* |
| * NonStop NSE and NSX do not provide NSIG. SIGGUARDIAN(99) is the highest |
| * known, by detective work using kill -l as a list is all signals |
| * instead of signal.h where it should be. |
| */ |
| # define NSIG 100 |
| #endif |
| #endif |
| |
| #if defined(__HP_cc) && (__HP_cc >= 61000) |
| #define NORETURN __attribute__((noreturn)) |
| #define NORETURN_PTR |
| #elif defined(__GNUC__) && !defined(NO_NORETURN) |
| #define NORETURN __attribute__((__noreturn__)) |
| #define NORETURN_PTR __attribute__((__noreturn__)) |
| #elif defined(_MSC_VER) |
| #define NORETURN __declspec(noreturn) |
| #define NORETURN_PTR |
| #else |
| #define NORETURN |
| #define NORETURN_PTR |
| #ifndef __GNUC__ |
| #ifndef __attribute__ |
| #define __attribute__(x) |
| #endif |
| #endif |
| #endif |
| |
| /* The sentinel attribute is valid from gcc version 4.0 */ |
| #if defined(__GNUC__) && (__GNUC__ >= 4) |
| #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) |
| /* warn_unused_result exists as of gcc 3.4.0, but be lazy and check 4.0 */ |
| #define RESULT_MUST_BE_USED __attribute__ ((warn_unused_result)) |
| #else |
| #define LAST_ARG_MUST_BE_NULL |
| #define RESULT_MUST_BE_USED |
| #endif |
| |
| #define MAYBE_UNUSED __attribute__((__unused__)) |
| |
| #include "compat/bswap.h" |
| |
| #include "wrapper.h" |
| |
| /* General helper functions */ |
| NORETURN void usage(const char *err); |
| NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int die_message(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int die_message_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| |
| #ifndef NO_OPENSSL |
| #ifdef APPLE_COMMON_CRYPTO |
| #include "compat/apple-common-crypto.h" |
| #else |
| #include <openssl/evp.h> |
| #include <openssl/hmac.h> |
| #endif /* APPLE_COMMON_CRYPTO */ |
| #include <openssl/x509v3.h> |
| #endif /* NO_OPENSSL */ |
| |
| #ifdef HAVE_OPENSSL_CSPRNG |
| #include <openssl/rand.h> |
| #endif |
| |
| /* |
| * Let callers be aware of the constant return value; this can help |
| * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, |
| * because other compilers may be confused by this. |
| */ |
| #if defined(__GNUC__) |
| static inline int const_error(void) |
| { |
| return -1; |
| } |
| #define error(...) (error(__VA_ARGS__), const_error()) |
| #define error_errno(...) (error_errno(__VA_ARGS__), const_error()) |
| #endif |
| |
| typedef void (*report_fn)(const char *, va_list params); |
| |
| void set_die_routine(NORETURN_PTR report_fn routine); |
| report_fn get_die_message_routine(void); |
| void set_error_routine(report_fn routine); |
| report_fn get_error_routine(void); |
| void set_warn_routine(report_fn routine); |
| report_fn get_warn_routine(void); |
| void set_die_is_recursing_routine(int (*routine)(void)); |
| |
| /* |
| * If the string "str" begins with the string found in "prefix", return true. |
| * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in |
| * the string right after the prefix). |
| * |
| * Otherwise, return false and leave "out" untouched. |
| * |
| * Examples: |
| * |
| * [extract branch name, fail if not a branch] |
| * if (!skip_prefix(ref, "refs/heads/", &branch) |
| * return -1; |
| * |
| * [skip prefix if present, otherwise use whole string] |
| * skip_prefix(name, "refs/heads/", &name); |
| */ |
| static inline bool skip_prefix(const char *str, const char *prefix, |
| const char **out) |
| { |
| do { |
| if (!*prefix) { |
| *out = str; |
| return true; |
| } |
| } while (*str++ == *prefix++); |
| return false; |
| } |
| |
| /* |
| * Like skip_prefix, but promises never to read past "len" bytes of the input |
| * buffer, and returns the remaining number of bytes in "out" via "outlen". |
| */ |
| static inline bool skip_prefix_mem(const char *buf, size_t len, |
| const char *prefix, |
| const char **out, size_t *outlen) |
| { |
| size_t prefix_len = strlen(prefix); |
| if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { |
| *out = buf + prefix_len; |
| *outlen = len - prefix_len; |
| return true; |
| } |
| return false; |
| } |
| |
| /* |
| * If buf ends with suffix, return true and subtract the length of the suffix |
| * from *len. Otherwise, return false and leave *len untouched. |
| */ |
| static inline bool strip_suffix_mem(const char *buf, size_t *len, |
| const char *suffix) |
| { |
| size_t suflen = strlen(suffix); |
| if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) |
| return false; |
| *len -= suflen; |
| return true; |
| } |
| |
| /* |
| * If str ends with suffix, return true and set *len to the size of the string |
| * without the suffix. Otherwise, return false and set *len to the size of the |
| * string. |
| * |
| * Note that we do _not_ NUL-terminate str to the new length. |
| */ |
| static inline bool strip_suffix(const char *str, const char *suffix, |
| size_t *len) |
| { |
| *len = strlen(str); |
| return strip_suffix_mem(str, len, suffix); |
| } |
| |
| #define SWAP(a, b) do { \ |
| void *_swap_a_ptr = &(a); \ |
| void *_swap_b_ptr = &(b); \ |
| unsigned char _swap_buffer[sizeof(a)]; \ |
| memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \ |
| memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \ |
| BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \ |
| memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \ |
| } while (0) |
| |
| #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) |
| |
| #ifndef PROT_READ |
| #define PROT_READ 1 |
| #define PROT_WRITE 2 |
| #define MAP_PRIVATE 1 |
| #endif |
| |
| #define mmap git_mmap |
| #define munmap git_munmap |
| void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
| int git_munmap(void *start, size_t length); |
| |
| #else /* NO_MMAP || USE_WIN32_MMAP */ |
| |
| #include <sys/mman.h> |
| |
| #endif /* NO_MMAP || USE_WIN32_MMAP */ |
| |
| #ifdef NO_MMAP |
| |
| /* This value must be multiple of (pagesize * 2) */ |
| #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
| |
| #else /* NO_MMAP */ |
| |
| /* This value must be multiple of (pagesize * 2) */ |
| #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
| (sizeof(void*) >= 8 \ |
| ? 1 * 1024 * 1024 * 1024 \ |
| : 32 * 1024 * 1024) |
| |
| #endif /* NO_MMAP */ |
| |
| #ifndef MAP_FAILED |
| #define MAP_FAILED ((void *)-1) |
| #endif |
| |
| #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT |
| #define on_disk_bytes(st) ((st).st_size) |
| #else |
| #define on_disk_bytes(st) ((st).st_blocks * 512) |
| #endif |
| |
| #ifdef NEEDS_MODE_TRANSLATION |
| #undef S_IFMT |
| #undef S_IFREG |
| #undef S_IFDIR |
| #undef S_IFLNK |
| #undef S_IFBLK |
| #undef S_IFCHR |
| #undef S_IFIFO |
| #undef S_IFSOCK |
| #define S_IFMT 0170000 |
| #define S_IFREG 0100000 |
| #define S_IFDIR 0040000 |
| #define S_IFLNK 0120000 |
| #define S_IFBLK 0060000 |
| #define S_IFCHR 0020000 |
| #define S_IFIFO 0010000 |
| #define S_IFSOCK 0140000 |
| #ifdef stat |
| #undef stat |
| #endif |
| #define stat(path, buf) git_stat(path, buf) |
| int git_stat(const char *, struct stat *); |
| #ifdef fstat |
| #undef fstat |
| #endif |
| #define fstat(fd, buf) git_fstat(fd, buf) |
| int git_fstat(int, struct stat *); |
| #ifdef lstat |
| #undef lstat |
| #endif |
| #define lstat(path, buf) git_lstat(path, buf) |
| int git_lstat(const char *, struct stat *); |
| #endif |
| |
| #define DEFAULT_PACKED_GIT_LIMIT \ |
| ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256)) |
| |
| #ifdef NO_PREAD |
| #define pread git_pread |
| ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); |
| #endif |
| |
| #ifdef NO_SETENV |
| #define setenv gitsetenv |
| int gitsetenv(const char *, const char *, int); |
| #endif |
| |
| #ifdef NO_MKDTEMP |
| #define mkdtemp gitmkdtemp |
| char *gitmkdtemp(char *); |
| #endif |
| |
| #ifdef NO_UNSETENV |
| #define unsetenv gitunsetenv |
| int gitunsetenv(const char *); |
| #endif |
| |
| #ifdef NO_STRCASESTR |
| #define strcasestr gitstrcasestr |
| char *gitstrcasestr(const char *haystack, const char *needle); |
| #endif |
| |
| #ifdef NO_STRLCPY |
| #define strlcpy gitstrlcpy |
| size_t gitstrlcpy(char *, const char *, size_t); |
| #endif |
| |
| #ifdef NO_STRTOUMAX |
| #define strtoumax gitstrtoumax |
| uintmax_t gitstrtoumax(const char *, char **, int); |
| #define strtoimax gitstrtoimax |
| intmax_t gitstrtoimax(const char *, char **, int); |
| #endif |
| |
| #ifdef NO_HSTRERROR |
| #define hstrerror githstrerror |
| const char *githstrerror(int herror); |
| #endif |
| |
| #ifdef NO_MEMMEM |
| #define memmem gitmemmem |
| void *gitmemmem(const void *haystack, size_t haystacklen, |
| const void *needle, size_t needlelen); |
| #endif |
| |
| #ifdef OVERRIDE_STRDUP |
| #ifdef strdup |
| #undef strdup |
| #endif |
| #define strdup gitstrdup |
| char *gitstrdup(const char *s); |
| #endif |
| |
| #ifdef NO_GETPAGESIZE |
| #define getpagesize() sysconf(_SC_PAGESIZE) |
| #endif |
| |
| #ifndef O_CLOEXEC |
| #define O_CLOEXEC 0 |
| #endif |
| |
| #ifdef FREAD_READS_DIRECTORIES |
| # if !defined(SUPPRESS_FOPEN_REDEFINITION) |
| # ifdef fopen |
| # undef fopen |
| # endif |
| # define fopen(a,b) git_fopen(a,b) |
| # endif |
| FILE *git_fopen(const char*, const char*); |
| #endif |
| |
| #ifdef SNPRINTF_RETURNS_BOGUS |
| #ifdef snprintf |
| #undef snprintf |
| #endif |
| #define snprintf git_snprintf |
| int git_snprintf(char *str, size_t maxsize, |
| const char *format, ...); |
| #ifdef vsnprintf |
| #undef vsnprintf |
| #endif |
| #define vsnprintf git_vsnprintf |
| int git_vsnprintf(char *str, size_t maxsize, |
| const char *format, va_list ap); |
| #endif |
| |
| #ifdef OPEN_RETURNS_EINTR |
| #undef open |
| #define open git_open_with_retry |
| int git_open_with_retry(const char *path, int flag, ...); |
| #endif |
| |
| #ifdef __GLIBC_PREREQ |
| #if __GLIBC_PREREQ(2, 1) |
| #define HAVE_STRCHRNUL |
| #endif |
| #endif |
| |
| #ifndef HAVE_STRCHRNUL |
| #define strchrnul gitstrchrnul |
| static inline char *gitstrchrnul(const char *s, int c) |
| { |
| while (*s && *s != c) |
| s++; |
| return (char *)s; |
| } |
| #endif |
| |
| #ifdef NO_INET_PTON |
| int inet_pton(int af, const char *src, void *dst); |
| #endif |
| |
| #ifdef NO_INET_NTOP |
| const char *inet_ntop(int af, const void *src, char *dst, size_t size); |
| #endif |
| |
| #ifdef NO_PTHREADS |
| #define atexit git_atexit |
| int git_atexit(void (*handler)(void)); |
| #endif |
| |
| static inline size_t st_add(size_t a, size_t b) |
| { |
| if (unsigned_add_overflows(a, b)) |
| die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, |
| (uintmax_t)a, (uintmax_t)b); |
| return a + b; |
| } |
| #define st_add3(a,b,c) st_add(st_add((a),(b)),(c)) |
| #define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d)) |
| |
| static inline size_t st_mult(size_t a, size_t b) |
| { |
| if (unsigned_mult_overflows(a, b)) |
| die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, |
| (uintmax_t)a, (uintmax_t)b); |
| return a * b; |
| } |
| |
| static inline size_t st_sub(size_t a, size_t b) |
| { |
| if (a < b) |
| die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, |
| (uintmax_t)a, (uintmax_t)b); |
| return a - b; |
| } |
| |
| static inline size_t st_left_shift(size_t a, unsigned shift) |
| { |
| if (unsigned_left_shift_overflows(a, shift)) |
| die("size_t overflow: %"PRIuMAX" << %u", |
| (uintmax_t)a, shift); |
| return a << shift; |
| } |
| |
| static inline unsigned long cast_size_t_to_ulong(size_t a) |
| { |
| if (a != (unsigned long)a) |
| die("object too large to read on this platform: %" |
| PRIuMAX" is cut off to %lu", |
| (uintmax_t)a, (unsigned long)a); |
| return (unsigned long)a; |
| } |
| |
| static inline uint32_t cast_size_t_to_uint32_t(size_t a) |
| { |
| if (a != (uint32_t)a) |
| die("object too large to read on this platform: %" |
| PRIuMAX" is cut off to %u", |
| (uintmax_t)a, (uint32_t)a); |
| return (uint32_t)a; |
| } |
| |
| static inline int cast_size_t_to_int(size_t a) |
| { |
| if (a > INT_MAX) |
| die("number too large to represent as int on this platform: %"PRIuMAX, |
| (uintmax_t)a); |
| return (int)a; |
| } |
| |
| /* |
| * Limit size of IO chunks, because huge chunks only cause pain. OS X |
| * 64-bit is buggy, returning EINVAL if len >= INT_MAX; and even in |
| * the absence of bugs, large chunks can result in bad latencies when |
| * you decide to kill the process. |
| * |
| * We pick 8 MiB as our default, but if the platform defines SSIZE_MAX |
| * that is smaller than that, clip it to SSIZE_MAX, as a call to |
| * read(2) or write(2) larger than that is allowed to fail. As the last |
| * resort, we allow a port to pass via CFLAGS e.g. "-DMAX_IO_SIZE=value" |
| * to override this, if the definition of SSIZE_MAX given by the platform |
| * is broken. |
| */ |
| #ifndef MAX_IO_SIZE |
| # define MAX_IO_SIZE_DEFAULT (8*1024*1024) |
| # if defined(SSIZE_MAX) && (SSIZE_MAX < MAX_IO_SIZE_DEFAULT) |
| # define MAX_IO_SIZE SSIZE_MAX |
| # else |
| # define MAX_IO_SIZE MAX_IO_SIZE_DEFAULT |
| # endif |
| #endif |
| |
| #ifdef HAVE_ALLOCA_H |
| # include <alloca.h> |
| # define xalloca(size) (alloca(size)) |
| # define xalloca_free(p) do {} while (0) |
| #else |
| # define xalloca(size) (xmalloc(size)) |
| # define xalloca_free(p) (free(p)) |
| #endif |
| |
| /* |
| * FREE_AND_NULL(ptr) is like free(ptr) followed by ptr = NULL. Note |
| * that ptr is used twice, so don't pass e.g. ptr++. |
| */ |
| #define FREE_AND_NULL(p) do { free(p); (p) = NULL; } while (0) |
| |
| #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) |
| #define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x))) |
| #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) |
| |
| #define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ |
| BARF_UNLESS_COPYABLE((dst), (src))) |
| static inline void copy_array(void *dst, const void *src, size_t n, size_t size) |
| { |
| if (n) |
| memcpy(dst, src, st_mult(size, n)); |
| } |
| |
| #define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \ |
| BARF_UNLESS_COPYABLE((dst), (src))) |
| static inline void move_array(void *dst, const void *src, size_t n, size_t size) |
| { |
| if (n) |
| memmove(dst, src, st_mult(size, n)); |
| } |
| |
| #define DUP_ARRAY(dst, src, n) do { \ |
| size_t dup_array_n_ = (n); \ |
| COPY_ARRAY(ALLOC_ARRAY((dst), dup_array_n_), (src), dup_array_n_); \ |
| } while (0) |
| |
| /* |
| * These functions help you allocate structs with flex arrays, and copy |
| * the data directly into the array. For example, if you had: |
| * |
| * struct foo { |
| * int bar; |
| * char name[FLEX_ARRAY]; |
| * }; |
| * |
| * you can do: |
| * |
| * struct foo *f; |
| * FLEX_ALLOC_MEM(f, name, src, len); |
| * |
| * to allocate a "foo" with the contents of "src" in the "name" field. |
| * The resulting struct is automatically zero'd, and the flex-array field |
| * is NUL-terminated (whether the incoming src buffer was or not). |
| * |
| * The FLEXPTR_* variants operate on structs that don't use flex-arrays, |
| * but do want to store a pointer to some extra data in the same allocated |
| * block. For example, if you have: |
| * |
| * struct foo { |
| * char *name; |
| * int bar; |
| * }; |
| * |
| * you can do: |
| * |
| * struct foo *f; |
| * FLEXPTR_ALLOC_STR(f, name, src); |
| * |
| * and "name" will point to a block of memory after the struct, which will be |
| * freed along with the struct (but the pointer can be repointed anywhere). |
| * |
| * The *_STR variants accept a string parameter rather than a ptr/len |
| * combination. |
| * |
| * Note that these macros will evaluate the first parameter multiple |
| * times, and it must be assignable as an lvalue. |
| */ |
| #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ |
| size_t flex_array_len_ = (len); \ |
| (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ |
| memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ |
| } while (0) |
| #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ |
| size_t flex_array_len_ = (len); \ |
| (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ |
| memcpy((x) + 1, (buf), flex_array_len_); \ |
| (x)->ptrname = (void *)((x)+1); \ |
| } while(0) |
| #define FLEX_ALLOC_STR(x, flexname, str) \ |
| FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) |
| #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ |
| FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) |
| |
| #define alloc_nr(x) (((x)+16)*3/2) |
| |
| /** |
| * Dynamically growing an array using realloc() is error prone and boring. |
| * |
| * Define your array with: |
| * |
| * - a pointer (`item`) that points at the array, initialized to `NULL` |
| * (although please name the variable based on its contents, not on its |
| * type); |
| * |
| * - an integer variable (`alloc`) that keeps track of how big the current |
| * allocation is, initialized to `0`; |
| * |
| * - another integer variable (`nr`) to keep track of how many elements the |
| * array currently has, initialized to `0`. |
| * |
| * Then before adding `n`th element to the item, call `ALLOC_GROW(item, n, |
| * alloc)`. This ensures that the array can hold at least `n` elements by |
| * calling `realloc(3)` and adjusting `alloc` variable. |
| * |
| * ------------ |
| * sometype *item; |
| * size_t nr; |
| * size_t alloc |
| * |
| * for (i = 0; i < nr; i++) |
| * if (we like item[i] already) |
| * return; |
| * |
| * // we did not like any existing one, so add one |
| * ALLOC_GROW(item, nr + 1, alloc); |
| * item[nr++] = value you like; |
| * ------------ |
| * |
| * You are responsible for updating the `nr` variable. |
| * |
| * If you need to specify the number of elements to allocate explicitly |
| * then use the macro `REALLOC_ARRAY(item, alloc)` instead of `ALLOC_GROW`. |
| * |
| * Consider using ALLOC_GROW_BY instead of ALLOC_GROW as it has some |
| * added niceties. |
| * |
| * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. |
| */ |
| #define ALLOC_GROW(x, nr, alloc) \ |
| do { \ |
| if ((nr) > alloc) { \ |
| if (alloc_nr(alloc) < (nr)) \ |
| alloc = (nr); \ |
| else \ |
| alloc = alloc_nr(alloc); \ |
| REALLOC_ARRAY(x, alloc); \ |
| } \ |
| } while (0) |
| |
| /* |
| * Similar to ALLOC_GROW but handles updating of the nr value and |
| * zeroing the bytes of the newly-grown array elements. |
| * |
| * DO NOT USE any expression with side-effect for any of the |
| * arguments. |
| */ |
| #define ALLOC_GROW_BY(x, nr, increase, alloc) \ |
| do { \ |
| if (increase) { \ |
| size_t new_nr = nr + (increase); \ |
| if (new_nr < nr) \ |
| BUG("negative growth in ALLOC_GROW_BY"); \ |
| ALLOC_GROW(x, new_nr, alloc); \ |
| memset((x) + nr, 0, sizeof(*(x)) * (increase)); \ |
| nr = new_nr; \ |
| } \ |
| } while (0) |
| |
| static inline char *xstrdup_or_null(const char *str) |
| { |
| return str ? xstrdup(str) : NULL; |
| } |
| |
| static inline size_t xsize_t(off_t len) |
| { |
| if (len < 0 || (uintmax_t) len > SIZE_MAX) |
| die("Cannot handle files this big"); |
| return (size_t) len; |
| } |
| |
| #ifndef HOST_NAME_MAX |
| #define HOST_NAME_MAX 256 |
| #endif |
| |
| #include "sane-ctype.h" |
| |
| /* |
| * Like skip_prefix, but compare case-insensitively. Note that the comparison |
| * is done via tolower(), so it is strictly ASCII (no multi-byte characters or |
| * locale-specific conversions). |
| */ |
| static inline int skip_iprefix(const char *str, const char *prefix, |
| const char **out) |
| { |
| do { |
| if (!*prefix) { |
| *out = str; |
| return 1; |
| } |
| } while (tolower(*str++) == tolower(*prefix++)); |
| return 0; |
| } |
| |
| /* |
| * Like skip_prefix_mem, but compare case-insensitively. Note that the |
| * comparison is done via tolower(), so it is strictly ASCII (no multi-byte |
| * characters or locale-specific conversions). |
| */ |
| static inline int skip_iprefix_mem(const char *buf, size_t len, |
| const char *prefix, |
| const char **out, size_t *outlen) |
| { |
| do { |
| if (!*prefix) { |
| *out = buf; |
| *outlen = len; |
| return 1; |
| } |
| } while (len-- > 0 && tolower(*buf++) == tolower(*prefix++)); |
| return 0; |
| } |
| |
| static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
| { |
| unsigned long ul; |
| char *p; |
| |
| errno = 0; |
| /* negative values would be accepted by strtoul */ |
| if (strchr(s, '-')) |
| return -1; |
| ul = strtoul(s, &p, base); |
| if (errno || *p || p == s || (unsigned int) ul != ul) |
| return -1; |
| *result = ul; |
| return 0; |
| } |
| |
| static inline int strtol_i(char const *s, int base, int *result) |
| { |
| long ul; |
| char *p; |
| |
| errno = 0; |
| ul = strtol(s, &p, base); |
| if (errno || *p || p == s || (int) ul != ul) |
| return -1; |
| *result = ul; |
| return 0; |
| } |
| |
| void git_stable_qsort(void *base, size_t nmemb, size_t size, |
| int(*compar)(const void *, const void *)); |
| #ifdef INTERNAL_QSORT |
| #define qsort git_stable_qsort |
| #endif |
| |
| #define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar) |
| static inline void sane_qsort(void *base, size_t nmemb, size_t size, |
| int(*compar)(const void *, const void *)) |
| { |
| if (nmemb > 1) |
| qsort(base, nmemb, size, compar); |
| } |
| |
| #define STABLE_QSORT(base, n, compar) \ |
| git_stable_qsort((base), (n), sizeof(*(base)), compar) |
| |
| #ifndef HAVE_ISO_QSORT_S |
| int git_qsort_s(void *base, size_t nmemb, size_t size, |
| int (*compar)(const void *, const void *, void *), void *ctx); |
| #define qsort_s git_qsort_s |
| #endif |
| |
| #define QSORT_S(base, n, compar, ctx) do { \ |
| if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \ |
| BUG("qsort_s() failed"); \ |
| } while (0) |
| |
| #ifndef REG_STARTEND |
| #error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" |
| #endif |
| |
| static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, |
| size_t nmatch, regmatch_t pmatch[], int eflags) |
| { |
| assert(nmatch > 0 && pmatch); |
| pmatch[0].rm_so = 0; |
| pmatch[0].rm_eo = size; |
| return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); |
| } |
| |
| #ifdef USE_ENHANCED_BASIC_REGULAR_EXPRESSIONS |
| int git_regcomp(regex_t *preg, const char *pattern, int cflags); |
| #define regcomp git_regcomp |
| #endif |
| |
| #ifndef DIR_HAS_BSD_GROUP_SEMANTICS |
| # define FORCE_DIR_SET_GID S_ISGID |
| #else |
| # define FORCE_DIR_SET_GID 0 |
| #endif |
| |
| #ifdef NO_NSEC |
| #undef USE_NSEC |
| #define ST_CTIME_NSEC(st) 0 |
| #define ST_MTIME_NSEC(st) 0 |
| #else |
| #ifdef USE_ST_TIMESPEC |
| #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) |
| #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) |
| #else |
| #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) |
| #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) |
| #endif |
| #endif |
| |
| #ifdef UNRELIABLE_FSTAT |
| #define fstat_is_reliable() 0 |
| #else |
| #define fstat_is_reliable() 1 |
| #endif |
| |
| #ifndef va_copy |
| /* |
| * Since an obvious implementation of va_list would be to make it a |
| * pointer into the stack frame, a simple assignment will work on |
| * many systems. But let's try to be more portable. |
| */ |
| #ifdef __va_copy |
| #define va_copy(dst, src) __va_copy(dst, src) |
| #else |
| #define va_copy(dst, src) ((dst) = (src)) |
| #endif |
| #endif |
| |
| /* usage.c: only to be used for testing BUG() implementation (see test-tool) */ |
| extern int BUG_exit_code; |
| |
| /* usage.c: if bug() is called we should have a BUG_if_bug() afterwards */ |
| extern int bug_called_must_BUG; |
| |
| __attribute__((format (printf, 3, 4))) NORETURN |
| void BUG_fl(const char *file, int line, const char *fmt, ...); |
| #define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__) |
| __attribute__((format (printf, 3, 4))) |
| void bug_fl(const char *file, int line, const char *fmt, ...); |
| #define bug(...) bug_fl(__FILE__, __LINE__, __VA_ARGS__) |
| #define BUG_if_bug(...) do { \ |
| if (bug_called_must_BUG) \ |
| BUG_fl(__FILE__, __LINE__, __VA_ARGS__); \ |
| } while (0) |
| |
| #ifndef FSYNC_METHOD_DEFAULT |
| #ifdef __APPLE__ |
| #define FSYNC_METHOD_DEFAULT FSYNC_METHOD_WRITEOUT_ONLY |
| #else |
| #define FSYNC_METHOD_DEFAULT FSYNC_METHOD_FSYNC |
| #endif |
| #endif |
| |
| #ifndef SHELL_PATH |
| # define SHELL_PATH "/bin/sh" |
| #endif |
| |
| #ifndef _POSIX_THREAD_SAFE_FUNCTIONS |
| static inline void git_flockfile(FILE *fh UNUSED) |
| { |
| ; /* nothing */ |
| } |
| static inline void git_funlockfile(FILE *fh UNUSED) |
| { |
| ; /* nothing */ |
| } |
| #undef flockfile |
| #undef funlockfile |
| #undef getc_unlocked |
| #define flockfile(fh) git_flockfile(fh) |
| #define funlockfile(fh) git_funlockfile(fh) |
| #define getc_unlocked(fh) getc(fh) |
| #endif |
| |
| #ifdef FILENO_IS_A_MACRO |
| int git_fileno(FILE *stream); |
| # ifndef COMPAT_CODE_FILENO |
| # undef fileno |
| # define fileno(p) git_fileno(p) |
| # endif |
| #endif |
| |
| #ifdef NEED_ACCESS_ROOT_HANDLER |
| int git_access(const char *path, int mode); |
| # ifndef COMPAT_CODE_ACCESS |
| # ifdef access |
| # undef access |
| # endif |
| # define access(path, mode) git_access(path, mode) |
| # endif |
| #endif |
| |
| /* |
| * Our code often opens a path to an optional file, to work on its |
| * contents when we can successfully open it. We can ignore a failure |
| * to open if such an optional file does not exist, but we do want to |
| * report a failure in opening for other reasons (e.g. we got an I/O |
| * error, or the file is there, but we lack the permission to open). |
| * |
| * Call this function after seeing an error from open() or fopen() to |
| * see if the errno indicates a missing file that we can safely ignore. |
| */ |
| static inline int is_missing_file_error(int errno_) |
| { |
| return (errno_ == ENOENT || errno_ == ENOTDIR); |
| } |
| |
| int cmd_main(int, const char **); |
| |
| /* |
| * Intercept all calls to exit() and route them to trace2 to |
| * optionally emit a message before calling the real exit(). |
| */ |
| int common_exit(const char *file, int line, int code); |
| #define exit(code) exit(common_exit(__FILE__, __LINE__, (code))) |
| |
| /* |
| * You can mark a stack variable with UNLEAK(var) to avoid it being |
| * reported as a leak by tools like LSAN or valgrind. The argument |
| * should generally be the variable itself (not its address and not what |
| * it points to). It's safe to use this on pointers which may already |
| * have been freed, or on pointers which may still be in use. |
| * |
| * Use this _only_ for a variable that leaks by going out of scope at |
| * program exit (so only from cmd_* functions or their direct helpers). |
| * Normal functions, especially those which may be called multiple |
| * times, should actually free their memory. This is only meant as |
| * an annotation, and does nothing in non-leak-checking builds. |
| */ |
| #ifdef SUPPRESS_ANNOTATED_LEAKS |
| void unleak_memory(const void *ptr, size_t len); |
| #define UNLEAK(var) unleak_memory(&(var), sizeof(var)) |
| #else |
| #define UNLEAK(var) do {} while (0) |
| #endif |
| |
| #define z_const |
| #include <zlib.h> |
| |
| #if ZLIB_VERNUM < 0x1290 |
| /* |
| * This is uncompress2, which is only available in zlib >= 1.2.9 |
| * (released as of early 2017). See compat/zlib-uncompress2.c. |
| */ |
| int uncompress2(Bytef *dest, uLongf *destLen, const Bytef *source, |
| uLong *sourceLen); |
| #endif |
| |
| /* |
| * This include must come after system headers, since it introduces macros that |
| * replace system names. |
| */ |
| #include "banned.h" |
| |
| /* |
| * container_of - Get the address of an object containing a field. |
| * |
| * @ptr: pointer to the field. |
| * @type: type of the object. |
| * @member: name of the field within the object. |
| */ |
| #define container_of(ptr, type, member) \ |
| ((type *) ((char *)(ptr) - offsetof(type, member))) |
| |
| /* |
| * helper function for `container_of_or_null' to avoid multiple |
| * evaluation of @ptr |
| */ |
| static inline void *container_of_or_null_offset(void *ptr, size_t offset) |
| { |
| return ptr ? (char *)ptr - offset : NULL; |
| } |
| |
| /* |
| * like `container_of', but allows returned value to be NULL |
| */ |
| #define container_of_or_null(ptr, type, member) \ |
| (type *)container_of_or_null_offset(ptr, offsetof(type, member)) |
| |
| /* |
| * like offsetof(), but takes a pointer to a variable of type which |
| * contains @member, instead of a specified type. |
| * @ptr is subject to multiple evaluation since we can't rely on __typeof__ |
| * everywhere. |
| */ |
| #if defined(__GNUC__) /* clang sets this, too */ |
| #define OFFSETOF_VAR(ptr, member) offsetof(__typeof__(*ptr), member) |
| #else /* !__GNUC__ */ |
| #define OFFSETOF_VAR(ptr, member) \ |
| ((uintptr_t)&(ptr)->member - (uintptr_t)(ptr)) |
| #endif /* !__GNUC__ */ |
| |
| #endif |