#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+#ifdef __GNUC__
+#define TYPEOF(x) (__typeof__(x))
+#else
+#define TYPEOF(x)
+#endif
+
+#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
+
+/* Approximation of the length of the decimal representation of this type. */
+#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
+
#if !defined(__APPLE__) && !defined(__FreeBSD__)
#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 */
extern uintmax_t gitstrtoumax(const char *, char **, int);
#endif
+#ifdef NO_HSTRERROR
+#define hstrerror githstrerror
+extern const char *githstrerror(int herror);
+#endif
+
extern void release_pack_memory(size_t, int);
static inline char* xstrdup(const char *str)