diff options
Diffstat (limited to 'git-compat-util.h')
| -rw-r--r-- | git-compat-util.h | 573 |
1 files changed, 45 insertions, 528 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index e123288e8f..4678e21c4c 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -23,26 +23,9 @@ #include <crtdbg.h> #endif -struct strbuf; - - -#define _FILE_OFFSET_BITS 64 +#include "compat/posix.h" - -/* 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 +struct strbuf; #if defined(__GNUC__) || defined(__clang__) # define PRAGMA(pragma) _Pragma(#pragma) @@ -110,12 +93,19 @@ DISABLE_WARNING(-Wsign-compare) # define BARF_UNLESS_COPYABLE(dst, src) \ BUILD_ASSERT_OR_ZERO(__builtin_types_compatible_p(__typeof__(*(dst)), \ __typeof__(*(src)))) + +# define BARF_UNLESS_SIGNED(var) BUILD_ASSERT_OR_ZERO(((__typeof__(var)) -1) < 0) +# define BARF_UNLESS_UNSIGNED(var) BUILD_ASSERT_OR_ZERO(((__typeof__(var)) -1) > 0) #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))) + +# define BARF_UNLESS_SIGNED(var) 0 +# define BARF_UNLESS_UNSIGNED(var) 0 #endif + /* * ARRAY_SIZE - get the number of elements in a visible array * @x: the array whose size you want. @@ -176,71 +166,6 @@ DISABLE_WARNING(-Wsign-compare) /* 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 - -/* - * 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 __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) { @@ -253,45 +178,6 @@ static inline int _have_unix_sockets(void) #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) { @@ -308,48 +194,6 @@ static inline int is_xplatform_dir_sep(int c) #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 */ @@ -370,60 +214,6 @@ static inline const char *precompose_string_if_needed(const char *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 @@ -441,34 +231,6 @@ char *gitdirname(char *); # 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 @@ -492,11 +254,6 @@ static inline int noop_core_config(const char *var UNUSED, #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) { @@ -824,25 +581,6 @@ static inline bool strip_suffix(const char *str, const char *suffix, 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) */ @@ -858,176 +596,17 @@ int git_munmap(void *start, size_t length); #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 +int git_open_cloexec(const char *name, int flags); +#define git_open(name) git_open_cloexec(name, O_RDONLY) static inline size_t st_add(size_t a, size_t b) { @@ -1089,6 +668,22 @@ static inline int cast_size_t_to_int(size_t a) return (int)a; } +static inline uint64_t u64_mult(uint64_t a, uint64_t b) +{ + if (unsigned_mult_overflows(a, b)) + die("uint64_t overflow: %"PRIuMAX" * %"PRIuMAX, + (uintmax_t)a, (uintmax_t)b); + return a * b; +} + +static inline uint64_t u64_add(uint64_t a, uint64_t b) +{ + if (unsigned_add_overflows(a, b)) + die("uint64_t overflow: %"PRIuMAX" + %"PRIuMAX, + (uintmax_t)a, (uintmax_t)b); + return a + b; +} + /* * 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 @@ -1295,12 +890,6 @@ static inline size_t xsize_t(off_t len) 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 @@ -1366,34 +955,6 @@ static inline int strtol_i(char const *s, int base, int *result) 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 @@ -1418,39 +979,12 @@ int git_regcomp(regex_t *preg, const char *pattern, int cflags); # 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; @@ -1460,6 +994,8 @@ 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__) +/* ASSERT: like assert(), but won't be compiled out with NDEBUG */ +#define ASSERT(a) if (!(a)) BUG("Assertion `" #a "' failed.") __attribute__((format (printf, 3, 4))) void bug_fl(const char *file, int line, const char *fmt, ...); #define bug(...) bug_fl(__FILE__, __LINE__, __VA_ARGS__) @@ -1480,41 +1016,6 @@ void bug_fl(const char *file, int line, const char *fmt, ...); # 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 @@ -1583,4 +1084,20 @@ static inline void *container_of_or_null_offset(void *ptr, size_t offset) ((uintptr_t)&(ptr)->member - (uintptr_t)(ptr)) #endif /* !__GNUC__ */ +/* + * Prevent an overly clever compiler from optimizing an expression + * out, triggering a false positive when building with the + * -Wunreachable-code option. false_but_the_compiler_does_not_know_it_ + * is defined in a compilation unit separate from where the macro is + * used, initialized to 0, and never modified. + */ +#define NOT_CONSTANT(expr) ((expr) || false_but_the_compiler_does_not_know_it_) +extern int false_but_the_compiler_does_not_know_it_; + +#ifdef CHECK_ASSERTION_SIDE_EFFECTS +#undef assert +extern int not_supposed_to_survive; +#define assert(expr) ((void)(not_supposed_to_survive || (expr))) +#endif /* CHECK_ASSERTION_SIDE_EFFECTS */ + #endif |