diff options
Diffstat (limited to 'git-compat-util.h')
| -rw-r--r-- | git-compat-util.h | 92 |
1 files changed, 85 insertions, 7 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index bc8fc8cf85..693a336ff5 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -3,6 +3,23 @@ #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. @@ -25,7 +42,40 @@ #endif #endif -#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) + +/* + * 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]))) +#else +# define BARF_UNLESS_AN_ARRAY(arr) 0 +#endif +/* + * ARRAY_SIZE - get the number of elements in a visible array + * <at> 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) \ @@ -137,6 +187,7 @@ #elif defined(_MSC_VER) #include "compat/msvc.h" #else +#include <sys/utsname.h> #include <sys/wait.h> #include <sys/resource.h> #include <sys/socket.h> @@ -178,7 +229,7 @@ typedef unsigned long uintptr_t; #else #define precompose_str(in,i_nfd2nfc) #define precompose_argv(c,v) -#define probe_utf8_pathname_composition(a,b) +#define probe_utf8_pathname_composition() #endif #ifdef MKDIR_WO_TRAILING_SLASH @@ -202,6 +253,8 @@ struct itimerval { #else #define basename gitbasename extern char *gitbasename(char *); +#define dirname gitdirname +extern char *gitdirname(char *); #endif #ifndef NO_ICONV @@ -245,6 +298,10 @@ extern char *gitbasename(char *); #define PRIuMAX "llu" #endif +#ifndef SCNuMAX +#define SCNuMAX PRIuMAX +#endif + #ifndef PRIu32 #define PRIu32 "u" #endif @@ -280,6 +337,14 @@ static inline int git_has_dos_drive_prefix(const char *path) #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) +{ + return 0; +} +#define skip_dos_drive_prefix git_skip_dos_drive_prefix +#endif + #ifndef is_dir_sep static inline int git_is_dir_sep(int c) { @@ -338,7 +403,6 @@ struct strbuf; /* General helper functions */ extern void vreportf(const char *prefix, const char *err, va_list params); -extern void vwritef(int fd, const char *prefix, const char *err, va_list params); extern NORETURN void usage(const char *err); extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); @@ -374,6 +438,7 @@ static inline int const_error(void) extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)); extern void set_error_routine(void (*routine)(const char *err, va_list params)); extern void set_die_is_recursing_routine(int (*routine)(void)); +extern void set_error_handle(FILE *); extern int starts_with(const char *str, const char *prefix); @@ -517,7 +582,7 @@ extern int git_lstat(const char *, struct stat *); #endif #define DEFAULT_PACKED_GIT_LIMIT \ - ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) + ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? 8192 : 256)) #ifdef NO_PREAD #define pread git_pread @@ -665,16 +730,20 @@ extern char *xstrndup(const char *str, size_t len); extern void *xrealloc(void *ptr, size_t size); extern void *xcalloc(size_t nmemb, size_t size); extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); +extern void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); +extern int xopen(const char *path, int flags, ...); extern ssize_t xread(int fd, void *buf, size_t len); extern ssize_t xwrite(int fd, const void *buf, size_t len); extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset); extern int xdup(int fd); +extern FILE *xfopen(const char *path, const char *mode); extern FILE *xfdopen(int fd, const char *mode); extern int xmkstemp(char *template); extern int xmkstemp_mode(char *template, int mode); extern int odb_mkstemp(char *template, size_t limit, const char *pattern); extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1); extern char *xgetcwd(void); +extern FILE *fopen_for_writing(const char *path); #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x))) @@ -690,6 +759,9 @@ static inline size_t xsize_t(off_t len) return (size_t)len; } +__attribute__((format (printf, 3, 4))) +extern int xsnprintf(char *dst, size_t max, const char *fmt, ...); + /* in ctype.c, for kwset users */ extern const unsigned char tolower_trans_tbl[256]; @@ -760,6 +832,9 @@ static inline int strtoul_ui(char const *s, int base, unsigned int *result) 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; @@ -865,9 +940,6 @@ int access_or_die(const char *path, int mode, unsigned flag); /* Warn on an inaccessible file that ought to be accessible */ void warn_on_inaccessible(const char *path); -/* Get the passwd entry for the UID of the current process. */ -struct passwd *xgetpwuid_self(void); - #ifdef GMTIME_UNRELIABLE_ERRORS struct tm *git_gmtime(const time_t *); struct tm *git_gmtime_r(const time_t *, struct tm *); @@ -883,4 +955,10 @@ struct tm *git_gmtime_r(const time_t *, struct tm *); # define SHELL_PATH "/bin/sh" #endif +#ifndef _POSIX_THREAD_SAFE_FUNCTIONS +#define flockfile(fh) +#define funlockfile(fh) +#define getc_unlocked(fh) getc(fh) +#endif + #endif |