+int gzopen(const char *zpath, int oflags, FILE **f_r, pid_t *pid_r,
+ const char *gziplevel /* 0 for read; may be 0, or "-1" etc. */);
+ /* returns errno value from open */
+void gzclose(FILE **f, pid_t *p, const char *what);
+ /* also OK with f==0, or p==-1 */
+
+char *masprintf(const char *fmt, ...) FMT(1,2);
+
+#define EXECLP_HELPER(helper, ...) do{ \
+ char *helper_path= masprintf("%s/%s",get_libdir(),helper); \
+ execlp(helper_path,helper, __VA_ARGS__); \
+ sysassert(errno==ENOENT); \
+ fatal("Failed to find helper program %s.\n" \
+ "(Are you in the correct directory?)", helper); \
+ }while(0)
+
+
+#define ARRAYSIZE(a) ((sizeof((a)) / sizeof((a)[0])))
+#define FILLZERO(obj) (memset(&(obj),0,sizeof((obj))))
+
+#define STRING2(x) #x
+#define STRING(x) STRING2(x)