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#ifndef _BIOH_
#define _BIOH_ 1
#include <sys/types.h> /* for off_t */
#include <fcntl.h> /* for O_RDONLY, O_WRONLY */
typedef struct Biobuf Biobuf;
enum
{
Bsize = 8*1024,
Bungetsize = 4, /* space for ungetc */
Bmagic = 0x314159,
Beof = -1,
Bbad = -2,
Binactive = 0, /* states */
Bractive,
Bwactive,
Bracteof,
Bend
};
struct Biobuf
{
int icount; /* neg num of bytes at eob */
int ocount; /* num of bytes at bob */
int rdline; /* num of bytes after rdline */
int runesize; /* num of bytes of last getrune */
int state; /* r/w/inactive */
int fid; /* open file */
int flag; /* magic if malloc'ed */
off_t offset; /* offset of buffer in file */
int bsize; /* size of buffer */
unsigned char* bbuf; /* pointer to beginning of buffer */
unsigned char* ebuf; /* pointer to end of buffer */
unsigned char* gbuf; /* pointer to good data in buf */
unsigned char b[Bungetsize+Bsize];
};
#define BGETC(bp)\
((bp)->icount?(bp)->bbuf[(bp)->bsize+(bp)->icount++]:Bgetc((bp)))
#define BPUTC(bp,c)\
((bp)->ocount?(bp)->bbuf[(bp)->bsize+(bp)->ocount++]=(c),0:Bputc((bp),(c)))
#define BOFFSET(bp)\
(((bp)->state==Bractive)?\
(bp)->offset + (bp)->icount:\
(((bp)->state==Bwactive)?\
(bp)->offset + ((bp)->bsize + (bp)->ocount):\
-1))
#define BLINELEN(bp)\
(bp)->rdline
#define BFILDES(bp)\
(bp)->fid
int Bbuffered(Biobuf*);
int Bfildes(Biobuf*);
int Bflush(Biobuf*);
int Bgetc(Biobuf*);
int Bgetd(Biobuf*, double*);
int Binit(Biobuf*, int, int);
int Binits(Biobuf*, int, int, unsigned char*, int);
int Blinelen(Biobuf*);
off_t Boffset(Biobuf*);
Biobuf* Bopen(char*, int);
int Bprint(Biobuf*, char*, ...);
int Bputc(Biobuf*, int);
void* Brdline(Biobuf*, int);
long Bread(Biobuf*, void*, long);
off_t Bseek(Biobuf*, off_t, int);
int Bterm(Biobuf*);
int Bungetc(Biobuf*);
int Bungetrune(Biobuf*);
long Bwrite(Biobuf*, void*, long);
char* Brdstr(Biobuf*, int, int);
long Bgetrune(Biobuf*);
int Bputrune(Biobuf*, long);
#endif
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