extern long_long scm_num2long_long SCM_P ((SCM num, char *pos, char *s_caller));
extern unsigned long scm_num2ulong SCM_P ((SCM num, char *pos, char *s_caller));
extern void scm_init_numbers SCM_P ((void));
extern long_long scm_num2long_long SCM_P ((SCM num, char *pos, char *s_caller));
extern unsigned long scm_num2ulong SCM_P ((SCM num, char *pos, char *s_caller));
extern void scm_init_numbers SCM_P ((void));