#ifndef _OQ_H_c5781c8d_
#define _OQ_H_c5781c8d_

/* This file is in the public domain. */

typedef struct oq OQ;
typedef struct oqe OQE;

struct oq {
  unsigned int len;
  OQE *head;
  OQE **tail;
  } ;

/*
 * Value passed as the length argument to the oq_queue_* functions to
 *  mean "use strlen of the buffer argument".
 *
 * This could be -1 except that that's too likely to occur by accident.
 */
#define OQ_STRLEN (-12345)

extern void oq_init(OQ *);
extern void oq_queue_point(OQ *, const void *, int);
extern void oq_queue_copy(OQ *, const void *, int);
extern void oq_queue_free(OQ *, void *, int);
extern int oq_writev(OQ *, int);
extern int oq_dropdata(OQ *, int);
extern unsigned int oq_qlen(OQ *);
extern int oq_empty(OQ *);
extern int oq_nonempty(OQ *);
extern int oq_canthappen(void *, int);
extern void oq_flush(OQ *);
extern void oq_cbwalk(OQ *, void (*)(const char *, int), int);

#endif