#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include "errarg.h"
#include "error.h"
#include "lib.h"
#include "stringclass.h"
#include "cset.h"
#include "cmap.h"
#include "defs.h"
unsigned hash_string(const char *, int);
int next_size(int);
extern string capitalize_fields;
extern string reverse_fields;
extern string abbreviate_fields;
extern string period_before_last_name;
extern string period_before_initial;
extern string period_before_hyphen;
extern string period_before_other;
extern string sort_fields;
extern int annotation_field;
extern string annotation_macro;
extern string discard_fields;
extern string articles;
extern int abbreviate_label_ranges;
extern string label_range_indicator;
extern int date_as_label;
extern string join_authors_exactly_two;
extern string join_authors_last_two;
extern string join_authors_default;
extern string separate_label_second_parts;
extern string et_al;
extern int et_al_min_elide;
extern int et_al_min_total;
extern int compatible_flag;
extern int set_label_spec(const char *);
extern int set_date_label_spec(const char *);
extern int set_short_label_spec(const char *);
extern int short_label_flag;
void clear_labels();
void command_error(const char *,
const errarg &arg1 = empty_errarg,
const errarg &arg2 = empty_errarg,
const errarg &arg3 = empty_errarg);
struct reference;
void compute_labels(reference **, int);