#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 * [email protected]. */ #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 … /* 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) … #else #define GIT_GNUC_PREREQ … #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 … # else #define FLEX_ARRAY … # endif #elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) #define FLEX_ARRAY … #endif /* * Otherwise, default to safer but a bit wasteful traditional style */ #ifndef FLEX_ARRAY #define FLEX_ARRAY … #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) … #if GIT_GNUC_PREREQ(3, 1) /* &arr[0] degrades to a pointer: a different type from an array */ #define BARF_UNLESS_AN_ARRAY(arr) … #define BARF_UNLESS_COPYABLE(dst, src) … #else #define BARF_UNLESS_AN_ARRAY … #define BARF_UNLESS_COPYABLE … #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) … #define bitsizeof(x) … #define maximum_signed_value_of_type(a) … #define maximum_unsigned_value_of_type(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) … #define unsigned_add_overflows(a, b) … /* * 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) … /* * 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) … #ifdef __GNUC__ #define TYPEOF(x) … #else #define TYPEOF … #endif #define MSB(x, bits) … #define HAS_MULTI_BITS(i) … #define DIV_ROUND_UP(n,d) … /* Approximation of the length of the decimal representation of this type. */ #define decimal_length(x) … #ifdef __MINGW64__ #define _POSIX_C_SOURCE … #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 … # else #define _XOPEN_SOURCE … # 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 … #define _XOPEN_SOURCE_EXTENDED … #endif #define _ALL_SOURCE … #define _GNU_SOURCE … #define _BSD_SOURCE … #define _DEFAULT_SOURCE … #define _NETBSD_SOURCE … #define _SGI_SOURCE … /* * UNUSED marks a function parameter that is always unused. It also * can be used to annotate a function, a variable, or a type that is * always unused. * * A callback interface may dictate that a function accepts a * parameter at that position, but the implementation of the function * may not need to use the parameter. In such a case, mark the parameter * with UNUSED. * * When a parameter may be used or unused, depending on conditional * compilation, consider using MAYBE_UNUSED instead. */ #if GIT_GNUC_PREREQ(4, 5) #define UNUSED … #elif defined(__GNUC__) #define UNUSED … #else #define UNUSED #endif #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ # if !defined(_WIN32_WINNT) #define _WIN32_WINNT … # endif #define WIN32_LEAN_AND_MEAN … #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) { … } #define 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) { … } #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 … #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) { … } static inline const char *precompose_string_if_needed(const char *in) { … } #define probe_utf8_pathname_composition() … #endif #ifdef MKDIR_WO_TRAILING_SLASH #define mkdir … 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) { … } #define 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 … #endif #ifndef NO_LIBGEN_H #include <libgen.h> #else #define basename … char *gitbasename(char *); #define dirname … 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 … #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 … #endif #ifndef NI_MAXSERV #define NI_MAXSERV … #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 … #endif #ifndef NAME_MAX #define NAME_MAX … #endif timestamp_t; #define PRItime … #define parse_timestamp … #define TIME_MAX … #define TIME_MIN … #ifndef PATH_SEP #define PATH_SEP … #endif #ifdef HAVE_PATHS_H #include <paths.h> #endif #ifndef _PATH_DEFPATH #define _PATH_DEFPATH … #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) { … } #define platform_core_config … #endif int lstat_cache_aware_rmdir(const char *path); #if !defined(__MINGW32__) && !defined(_MSC_VER) #define rmdir … #endif #ifndef has_dos_drive_prefix static inline int git_has_dos_drive_prefix(const char *path UNUSED) { … } #define has_dos_drive_prefix … #endif #ifndef skip_dos_drive_prefix static inline int git_skip_dos_drive_prefix(char **path UNUSED) { … } #define skip_dos_drive_prefix … #endif static inline int git_is_dir_sep(int c) { … } #ifndef is_dir_sep #define is_dir_sep … #endif #ifndef offset_1st_component static inline int git_offset_1st_component(const char *path) { … } #define offset_1st_component … #endif #ifndef fspathcmp #define fspathcmp … #endif #ifndef fspathncmp #define fspathncmp … #endif #ifndef is_valid_path #define is_valid_path(path) … #endif #ifndef is_path_owned_by_current_user #ifdef __TANDEM #define ROOT_UID … #else #define ROOT_UID … #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 [email protected] 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) { … } static inline int is_path_owned_by_current_uid(const char *path, struct strbuf *report UNUSED) { … } #define is_path_owned_by_current_user … #endif #ifndef find_last_dir_sep static inline char *git_find_last_dir_sep(const char *path) { … } #define find_last_dir_sep … #endif #ifndef has_dir_sep static inline int git_has_dir_sep(const char *path) { … } #define has_dir_sep(path) … #endif #ifndef query_user_email #define query_user_email() … #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 … #endif #endif #if defined(__HP_cc) && (__HP_cc >= 61000) #define NORETURN … #define NORETURN_PTR #elif defined(__GNUC__) && !defined(NO_NORETURN) #define NORETURN … #define NORETURN_PTR … #elif defined(_MSC_VER) #define 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 … /* warn_unused_result exists as of gcc 3.4.0, but be lazy and check 4.0 */ #define RESULT_MUST_BE_USED … #else #define LAST_ARG_MUST_BE_NULL #define RESULT_MUST_BE_USED #endif /* * MAYBE_UNUSED marks a function parameter that may be unused, but * whose use is not an error. It also can be used to annotate a * function, a variable, or a type that may be unused. * * Depending on a configuration, all uses of such a thing may become * #ifdef'ed away. Marking it with UNUSED would give a warning in a * compilation where it is indeed used, and not marking it at all * would give a warning in a compilation where it is unused. In such * a case, MAYBE_UNUSED is the appropriate annotation to use. */ #define MAYBE_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) { … } #define error(...) … #define error_errno(...) … #endif report_fn; 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) { … } /* * 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) { … } /* * 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) { … } /* * 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) { … } #define SWAP(a, b) … #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) #ifndef PROT_READ #define PROT_READ … #define PROT_WRITE … #define MAP_PRIVATE … #endif #define mmap … #define 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 … #else /* NO_MMAP */ /* This value must be multiple of (pagesize * 2) */ #define DEFAULT_PACKED_GIT_WINDOW_SIZE … #endif /* NO_MMAP */ #ifndef MAP_FAILED #define MAP_FAILED … #endif #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT #define on_disk_bytes … #else #define on_disk_bytes(st) … #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 … #define S_IFREG … #define S_IFDIR … #define S_IFLNK … #define S_IFBLK … #define S_IFCHR … #define S_IFIFO … #define S_IFSOCK … #ifdef stat #undef stat #endif #define stat … int git_stat(const char *, struct stat *); #ifdef fstat #undef fstat #endif #define fstat … int git_fstat(int, struct stat *); #ifdef lstat #undef lstat #endif #define lstat … int git_lstat(const char *, struct stat *); #endif #define DEFAULT_PACKED_GIT_LIMIT … #ifdef NO_PREAD #define pread … ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); #endif #ifdef NO_SETENV #define setenv … int gitsetenv(const char *, const char *, int); #endif #ifdef NO_MKDTEMP #define mkdtemp … char *gitmkdtemp(char *); #endif #ifdef NO_UNSETENV #define unsetenv … int gitunsetenv(const char *); #endif #ifdef NO_STRCASESTR #define strcasestr … char *gitstrcasestr(const char *haystack, const char *needle); #endif #ifdef NO_STRLCPY #define strlcpy … size_t gitstrlcpy(char *, const char *, size_t); #endif #ifdef NO_STRTOUMAX #define strtoumax … uintmax_t gitstrtoumax(const char *, char **, int); #define strtoimax … intmax_t gitstrtoimax(const char *, char **, int); #endif #ifdef NO_HSTRERROR #define hstrerror … const char *githstrerror(int herror); #endif #ifdef NO_MEMMEM #define memmem … 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 … char *gitstrdup(const char *s); #endif #ifdef NO_GETPAGESIZE #define getpagesize … #endif #ifndef O_CLOEXEC #define O_CLOEXEC … #endif #ifdef FREAD_READS_DIRECTORIES # if !defined(SUPPRESS_FOPEN_REDEFINITION) # ifdef fopen # undef fopen # endif #define fopen(a,b) … # endif FILE *git_fopen(const char*, const char*); #endif #ifdef SNPRINTF_RETURNS_BOGUS #ifdef snprintf #undef snprintf #endif #define snprintf … int git_snprintf(char *str, size_t maxsize, const char *format, ...); #ifdef vsnprintf #undef vsnprintf #endif #define vsnprintf … int git_vsnprintf(char *str, size_t maxsize, const char *format, va_list ap); #endif #ifdef OPEN_RETURNS_EINTR #undef open #define open … 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 … 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 … int git_atexit(void (*handler)(void)); #endif static inline size_t st_add(size_t a, size_t b) { … } #define st_add3(a,b,c) … #define st_add4(a,b,c,d) … static inline size_t st_mult(size_t a, size_t b) { … } static inline size_t st_sub(size_t a, size_t b) { … } static inline size_t st_left_shift(size_t a, unsigned shift) { … } static inline unsigned long cast_size_t_to_ulong(size_t a) { … } static inline uint32_t cast_size_t_to_uint32_t(size_t a) { … } static inline int cast_size_t_to_int(size_t 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 … # if defined(SSIZE_MAX) && (SSIZE_MAX < MAX_IO_SIZE_DEFAULT) #define MAX_IO_SIZE … # else #define MAX_IO_SIZE … # endif #endif #ifdef HAVE_ALLOCA_H # include <alloca.h> #define xalloca(size) … #define xalloca_free(p) … #else #define xalloca … #define xalloca_free … #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) … #define ALLOC_ARRAY(x, alloc) … #define CALLOC_ARRAY(x, alloc) … #define REALLOC_ARRAY(x, alloc) … #define COPY_ARRAY(dst, src, n) … static inline void copy_array(void *dst, const void *src, size_t n, size_t size) { … } #define MOVE_ARRAY(dst, src, n) … static inline void move_array(void *dst, const void *src, size_t n, size_t size) { … } #define DUP_ARRAY(dst, src, n) … /* * 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) … #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) … #define FLEX_ALLOC_STR(x, flexname, str) … #define FLEXPTR_ALLOC_STR(x, ptrname, str) … #define alloc_nr(x) … /** * 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) … /* * 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) … static inline char *xstrdup_or_null(const char *str) { … } static inline size_t xsize_t(off_t len) { … } #ifndef HOST_NAME_MAX #define HOST_NAME_MAX … #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) { … } /* * 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) { … } static inline int strtoul_ui(char const *s, int base, unsigned int *result) { … } static inline int strtol_i(char const *s, int base, int *result) { … } void git_stable_qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *)); #ifdef INTERNAL_QSORT #define qsort … #endif #define QSORT(base, n, compar) … static inline void sane_qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *)) { … } #define STABLE_QSORT(base, n, 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 … #endif #define QSORT_S(base, n, compar, ctx) … #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) { … } #ifdef USE_ENHANCED_BASIC_REGULAR_EXPRESSIONS int git_regcomp(regex_t *preg, const char *pattern, int cflags); #define regcomp … #endif #ifndef DIR_HAS_BSD_GROUP_SEMANTICS #define FORCE_DIR_SET_GID … #else #define FORCE_DIR_SET_GID … #endif #ifdef NO_NSEC #undef USE_NSEC #define ST_CTIME_NSEC … #define ST_MTIME_NSEC … #else #ifdef USE_ST_TIMESPEC #define ST_CTIME_NSEC … #define ST_MTIME_NSEC … #else #define ST_CTIME_NSEC(st) … #define ST_MTIME_NSEC(st) … #endif #endif #ifdef UNRELIABLE_FSTAT #define fstat_is_reliable … #else #define fstat_is_reliable() … #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 … #else #define va_copy … #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(...) … __attribute__((format (printf, 3, 4))) void bug_fl(const char *file, int line, const char *fmt, ...); #define bug(...) … #define BUG_if_bug(...) … #ifndef FSYNC_METHOD_DEFAULT #ifdef __APPLE__ #define FSYNC_METHOD_DEFAULT … #else #define FSYNC_METHOD_DEFAULT … #endif #endif #ifndef SHELL_PATH #define SHELL_PATH … #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 … #define funlockfile … #define getc_unlocked … #endif #ifdef FILENO_IS_A_MACRO int git_fileno(FILE *stream); # ifndef COMPAT_CODE_FILENO # undef fileno #define fileno … # 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 … # 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_) { … } 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) … /* * 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 … #else #define UNLEAK(var) … #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) … /* * 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) { … } /* * like `container_of', but allows returned value to be NULL */ #define container_of_or_null(ptr, 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) … #else /* !__GNUC__ */ #define OFFSETOF_VAR … #endif /* !__GNUC__ */ #endif
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