Subversion Repositories planix.SVN

#pragma src     "/sys/src/libbio"
#pragma lib     "libbio.a"

typedef struct  Biobuf  Biobuf;
typedef struct  Biobufhdr       Biobufhdr;

enum
{
        Bsize           = 8*1024,
        Bungetsize      = UTFmax+1,             /* space for ungetc */
        Bmagic          = 0x314159,
        Beof            = -1,
        Bbad            = -2,

        Binactive       = 0,            /* states */
        Bractive,
        Bwactive,
        Bracteof,
};

struct  Biobufhdr
{
        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 */
        vlong   offset;         /* offset of buffer in file */
        int     bsize;          /* size of buffer */
        uchar*  bbuf;           /* pointer to beginning of buffer */
        uchar*  ebuf;           /* pointer to end of buffer */
        uchar*  gbuf;           /* pointer to good data in buf */
};

struct  Biobuf
{
        Biobufhdr;
        uchar   b[Bungetsize+Bsize];
};

/* Dregs, redefined as functions for backwards compatibility */
#define BGETC(bp)       Bgetc(bp)
#define BPUTC(bp,c)     Bputc(bp,c)
#define BOFFSET(bp)     Boffset(bp)
#define BLINELEN(bp)    Blinelen(bp)
#define BFILDES(bp)     Bfildes(bp)

int     Bbuffered(Biobufhdr*);
int     Bfildes(Biobufhdr*);
int     Bflush(Biobufhdr*);
int     Bgetc(Biobufhdr*);
int     Bgetd(Biobufhdr*, double*);
long    Bgetrune(Biobufhdr*);
int     Binit(Biobuf*, int, int);
int     Binits(Biobufhdr*, int, int, uchar*, int);
int     Blinelen(Biobufhdr*);
vlong   Boffset(Biobufhdr*);
Biobuf* Bopen(char*, int);
int     Bprint(Biobufhdr*, char*, ...);
int     Bvprint(Biobufhdr*, char*, va_list);
int     Bputc(Biobufhdr*, int);
int     Bputrune(Biobufhdr*, long);
void*   Brdline(Biobufhdr*, int);
char*   Brdstr(Biobufhdr*, int, int);
long    Bread(Biobufhdr*, void*, long);
vlong   Bseek(Biobufhdr*, vlong, int);
int     Bterm(Biobufhdr*);
int     Bungetc(Biobufhdr*);
int     Bungetrune(Biobufhdr*);
long    Bwrite(Biobufhdr*, void*, long);

#pragma varargck        argpos  Bprint  2