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Diffstat (limited to 'include/bio.h')
| -rw-r--r-- | include/bio.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/include/bio.h b/include/bio.h new file mode 100644 index 000000000..c754d7a57 --- /dev/null +++ b/include/bio.h @@ -0,0 +1,116 @@ +/* +http://code.google.com/p/inferno-os/source/browse/include/bio.h + + Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. + Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +#ifndef _BIO_H_ +#define _BIO_H_ 1 +#if defined(__cplusplus) +extern "C" { +#endif + +#ifdef AUTOLIB +AUTOLIB(bio) +#endif + +#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 */ + vlong 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*); +Biobuf* Bfdopen(int, int); +int Bfildes(Biobuf*); +int Bflush(Biobuf*); +int Bgetc(Biobuf*); +int Bgetd(Biobuf*, double*); +long Bgetrune(Biobuf*); +int Binit(Biobuf*, int, int); +int Binits(Biobuf*, int, int, unsigned char*, int); +int Blinelen(Biobuf*); +vlong Boffset(Biobuf*); +Biobuf* Bopen(char*, int); +int Bprint(Biobuf*, char*, ...); +int Bputc(Biobuf*, int); +int Bputrune(Biobuf*, long); +void* Brdline(Biobuf*, int); +char* Brdstr(Biobuf*, int, int); +long Bread(Biobuf*, void*, long); +vlong Bseek(Biobuf*, vlong, int); +int Bterm(Biobuf*); +int Bungetc(Biobuf*); +int Bungetrune(Biobuf*); +long Bwrite(Biobuf*, void*, long); +int Bvprint(Biobuf*, char*, va_list); + +#if defined(__cplusplus) +} +#endif +#endif |