dbuf.h

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/* Copyright (C) 1998 Oregon Graduate Institute of Science & Technology
 * 
 * See the file COPYRIGHT, which should have been supplied with this
 * package, for licensing details.  We may be contacted through email
 * at <quasar-help@cse.ogi.edu>.
 */

#ifndef DBUF_H
#define DBUF_H

#include <stdlib.h>

typedef unsigned char uchar;

struct dbuf;
typedef struct dbuf dbuf;

typedef struct {
    void (*free)(dbuf *);
    dbuf *(*copy)(dbuf *);
    dbuf *(*copy_mut)(dbuf *);
    dbuf *(*sub)(dbuf *, size_t, size_t);
    dbuf *(*sub_mut)(dbuf *, size_t, size_t);
    void (*grow)(dbuf *, size_t);
    size_t (*xpnd)(dbuf *);
    void (*ins)(dbuf *, size_t, size_t);
    void (*del)(dbuf *, size_t, size_t);
} dbuf_vtab;

struct dbuf {
    uchar *cur;
    uchar *end;
    const dbuf_vtab *vtab;
};


#define dbCUR(db)       (db)->cur
#define dbLEN(db)       ((db)->end - (db)->cur)
#define dbEND(db)       (db)->end

#define dbFREE(db)              (*(db)->vtab->free)(db)
#define dbCOPY(db)              (*(db)->vtab->copy)(db)
#define dbCOPY_mut(db)          (*(db)->vtab->copy_mut)(db)
#define dbSUB(db,pos,len)       (*(db)->vtab->sub)(db,pos,len)
#define dbSUB_mut(db,pos,len)   (*(db)->vtab->sub_mut)(db,pos,len)
#define dbGROW(db,len)          (*(db)->vtab->grow)(db,len)
#define dbXPND(db)              (*(db)->vtab->xpnd)(db)
#define dbINS(db,pos,len)       (*(db)->vtab->ins)(db,pos,len)
#define dbDEL(db,pos,len)       (*(db)->vtab->del)(db,pos,len)


dbuf *new_raw_dbuf(size_t bufsize);

#endif /* DBUF_H */

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