85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
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/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#pragma src "/sys/src/lib/bio"
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#pragma lib "libbio.a"
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typedef struct Biobuf Biobuf;
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typedef struct Biobufhdr Biobufhdr;
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enum
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{
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Bsize = 8*1024,
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Bungetsize = UTFmax+1, /* space for ungetc */
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Bmagic = 0x314159,
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Beof = -1,
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Bbad = -2,
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Binactive = 0, /* states */
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Bractive,
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Bwactive,
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Bracteof,
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};
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struct Biobufhdr
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{
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int icount; /* neg num of bytes at eob */
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int ocount; /* num of bytes at bob */
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int rdline; /* num of bytes after rdline */
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int runesize; /* num of bytes of last getrune */
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int state; /* r/w/inactive */
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int fid; /* open file */
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int flag; /* magic if malloc'ed */
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int64_t offset; /* offset of buffer in file */
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int bsize; /* size of buffer */
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uint8_t* bbuf; /* pointer to beginning of buffer */
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uint8_t* ebuf; /* pointer to end of buffer */
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uint8_t* gbuf; /* pointer to good data in buf */
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};
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struct Biobuf
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{
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Biobufhdr;
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uint8_t b[Bungetsize+Bsize];
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};
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/* Dregs, redefined as functions for backwards compatibility */
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#define BGETC(bp) Bgetc(bp)
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#define BPUTC(bp,c) Bputc(bp,c)
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#define BOFFSET(bp) Boffset(bp)
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#define BLINELEN(bp) Blinelen(bp)
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#define BFILDES(bp) Bfildes(bp)
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int Bbuffered(Biobufhdr*);
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int Bfildes(Biobufhdr*);
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int Bflush(Biobufhdr*);
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int Bgetc(Biobufhdr*);
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int Bgetd(Biobufhdr*, double*);
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int32_t Bgetrune(Biobufhdr*);
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int Binit(Biobuf*, int, int);
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int Binits(Biobufhdr*, int, int, uint8_t*, int);
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int Blinelen(Biobufhdr*);
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int64_t Boffset(Biobufhdr*);
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Biobuf* Bopen(char*, int);
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Biobuf* Bfdopen(int, int);
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int Bprint(Biobufhdr*, char*, ...);
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int Bvprint(Biobufhdr*, char*, va_list);
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int Bputc(Biobufhdr*, int);
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int Bputrune(Biobufhdr*, int32_t);
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void* Brdline(Biobufhdr*, int);
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char* Brdstr(Biobufhdr*, int, int);
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int32_t Bread(Biobufhdr*, void*, int32_t);
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int64_t Bseek(Biobufhdr*, int64_t, int);
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int Bterm(Biobufhdr*);
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int Bungetc(Biobufhdr*);
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int Bungetrune(Biobufhdr*);
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int32_t Bwrite(Biobufhdr*, void*, int32_t);
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#pragma varargck argpos Bprint 2
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