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Annotation of 43BSD/contrib/cpm/src/cpmfio.h, revision 1.1.1.1

1.1       root        1: /*     cpmfio.h        1.5     83/05/13        */
                      2: 
                      3: #define C_NFILE                5       /* max number of concurrently open cp/m files */
                      4: 
                      5: typedef struct c_iobuf {
                      6:        int     c_cnt;          /* bytes left in buffer */
                      7:        int     c_blk;          /* block number within the current extent */
                      8:                                /* (starting at 0) */
                      9:        int     c_seccnt;       /* number of physical sectors left in */
                     10:                                /* the current extent */
                     11:        int     c_ext;          /* current extent's directory index */
                     12:        int     c_extno;        /* extent number within current file */
                     13:        char    *c_buf;         /* next character position */
                     14:        char    *c_base;        /* location of buffer */
                     15:        short   c_flag;         /* access mode (READ or WRITE) */
                     16:        struct directory *c_dirp;       /* pointer to the current */
                     17:                                        /* extent's directory entry */
                     18: }      C_FILE;
                     19: extern C_FILE  c_iob[C_NFILE];
                     20: 
                     21: #define c_getc(p)      (--(p)->c_cnt>=0 ? *(p)->c_buf++&0377 : c_fillbuf(p))
                     22: #define c_putc(x,p)    (--(p)->c_cnt>=0 ? ((int)(*(p)->c_buf++=(unsigned)(x))) : c_flsbuf((unsigned)(x), p))
                     23: 
                     24: C_FILE *c_open(), *c_creat();
                     25: 
                     26: #define READ   0x01
                     27: #define WRITE  0x02
                     28: #define RW     0x03
                     29: #define MODFLG 0x08
                     30: #define BINARY 0x10

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