#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))
+
#ifdef __GNUC__
#define TYPEOF(x) (__typeof__(x))
#else
#else
#define basename gitbasename
extern char *gitbasename(char *);
+#define dirname gitdirname
+extern char *gitdirname(char *);
#endif
#ifndef NO_ICONV
#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)
{
typedef void (*try_to_free_t)(size_t);
extern try_to_free_t set_try_to_free_routine(try_to_free_t);
+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((a),st_add((b),(c)))
+#define st_add4(a,b,c,d) st_add((a),st_add3((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;
+}
+
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
# define xalloca(size) (alloca(size))
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)))
/* 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 *);