diff options
Diffstat (limited to 'git-compat-util.h')
| -rw-r--r-- | git-compat-util.h | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index 4824c8cad4..4f0028ce60 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -97,8 +97,14 @@ struct strbuf; # 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 @@ -341,11 +347,13 @@ struct itimerval { #endif #ifdef NO_SETITIMER -static inline int setitimer(int which UNUSED, - const struct itimerval *value UNUSED, - struct itimerval *newvalue UNUSED) { +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 @@ -1020,6 +1028,14 @@ static inline unsigned long cast_size_t_to_ulong(size_t a) return (unsigned long)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 @@ -1092,7 +1108,7 @@ int xstrncmpz(const char *s, const char *t, size_t len); #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)) + \ - BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) + BARF_UNLESS_COPYABLE((dst), (src))) static inline void copy_array(void *dst, const void *src, size_t n, size_t size) { if (n) @@ -1100,13 +1116,18 @@ static inline void copy_array(void *dst, const void *src, size_t n, size_t size) } #define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \ - BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) + 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: @@ -1476,14 +1497,19 @@ int open_nofollow(const char *path, int flags); #endif #ifndef _POSIX_THREAD_SAFE_FUNCTIONS -static inline void flockfile(FILE *fh UNUSED) +static inline void git_flockfile(FILE *fh UNUSED) { ; /* nothing */ } -static inline void funlockfile(FILE *fh UNUSED) +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 |