bio.h (2392B)
1 #ifndef _BIO_H_ 2 #define _BIO_H_ 1 3 #if defined(__cplusplus) 4 extern "C" { 5 #endif 6 7 #ifdef AUTOLIB 8 AUTOLIB(bio) 9 #endif 10 11 #include <fcntl.h> /* for O_RDONLY, O_WRONLY */ 12 13 typedef struct Biobuf Biobuf; 14 15 enum { 16 Bsize = 8 * 1024, 17 Bungetsize = 4, /* space for ungetc */ 18 Bmagic = 0x314159, 19 Beof = -1, 20 Bbad = -2, 21 22 Binactive = 0, /* states */ 23 Bractive, 24 Bwactive, 25 Bracteof, 26 27 Bend 28 }; 29 30 struct Biobuf { 31 int icount; /* neg num of bytes at eob */ 32 int ocount; /* num of bytes at bob */ 33 int rdline; /* num of bytes after rdline */ 34 int runesize; /* num of bytes of last getrune */ 35 int state; /* r/w/inactive */ 36 int fid; /* open file */ 37 int flag; /* magic if malloc'ed */ 38 long long offset; /* offset of buffer in file */ 39 int bsize; /* size of buffer */ 40 unsigned char* bbuf; /* pointer to beginning of buffer */ 41 unsigned char* ebuf; /* pointer to end of buffer */ 42 unsigned char* gbuf; /* pointer to good data in buf */ 43 unsigned char b[Bungetsize + Bsize]; 44 }; 45 46 #define BGETC(bp) \ 47 ((bp)->icount ? (bp)->bbuf[(bp)->bsize + (bp)->icount++] : Bgetc((bp))) 48 #define BPUTC(bp, c) \ 49 ((bp)->ocount ? (bp)->bbuf[(bp)->bsize + (bp)->ocount++] = (c), 0 : Bputc((bp), (c))) 50 #define BOFFSET(bp) \ 51 (((bp)->state == Bractive) ? (bp)->offset + (bp)->icount : (((bp)->state == Bwactive) ? (bp)->offset + ((bp)->bsize + (bp)->ocount) : -1)) 52 #define BLINELEN(bp) \ 53 (bp)->rdline 54 #define BFILDES(bp) \ 55 (bp)->fid 56 57 int Bbuffered(Biobuf*); 58 Biobuf* Bfdopen(int, int); 59 int Bfildes(Biobuf*); 60 int Bflush(Biobuf*); 61 int Bgetc(Biobuf*); 62 int Bgetd(Biobuf*, double*); 63 long Bgetrune(Biobuf*); 64 int Binit(Biobuf*, int, int); 65 int Binits(Biobuf*, int, int, unsigned char*, int); 66 int Blinelen(Biobuf*); 67 long long Boffset(Biobuf*); 68 Biobuf* Bopen(char*, int); 69 int Bprint(Biobuf*, char*, ...); 70 int Bputc(Biobuf*, int); 71 int Bputrune(Biobuf*, long); 72 void* Brdline(Biobuf*, int); 73 char* Brdstr(Biobuf*, int, int); 74 long Bread(Biobuf*, void*, long); 75 long long Bseek(Biobuf*, long long, int); 76 int Bterm(Biobuf*); 77 int Bungetc(Biobuf*); 78 int Bungetrune(Biobuf*); 79 long Bwrite(Biobuf*, void*, long); 80 int Bvprint(Biobuf*, char*, ...); 81 82 #if defined(__cplusplus) 83 } 84 #endif 85 #endif