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Annotation of xinu/h/io.h, revision 1.1.1.1

1.1       root        1: /* io.h -  fgetc, fputc, getchar, isbaddev, putchar */
                      2: 
                      3: #include <iodisp.h>
                      4: 
                      5: #if defined(NDEVS) && NDEVS > 0
                      6: #define        INTVECI ((int)devveci0) /* lowest input interrupt dispatch loc  */
                      7: #define        INTVECO ((int)devveco0) /* lowest output interrupt dispatch loc */
                      8: #define DVECSIZE (INTVECO-INTVECI)/* bytes per dispatch vector-to loc  */
                      9: #else
                     10: #define INTVECI NULLPTR                /* dummy definitions                    */
                     11: #define INTVECO NULLPTR
                     12: #define DVECSIZE 0
                     13: #endif
                     14: 
                     15: struct intmap  {               /* device-to-interrupt routine mapping  */
                     16:        int     (*iin)();       /* address of input interrupt routine   */
                     17:        int     icode;          /* argument passed to input routine     */
                     18:        int     (*iout)();      /* address of output interrupt routine  */
                     19:        int     ocode;          /* argument passed to output routine    */
                     20:        };
                     21: 
                     22: #ifdef NDEVS
                     23: extern struct  intmap intmap[NDEVS];
                     24: #define        isbaddev(f)     ( (f)<0 || (f)>=NDEVS )
                     25: #endif
                     26: 
                     27: #define        BADDEV          -1
                     28: 
                     29: /* In-line I/O procedures */
                     30: 
                     31: #define        getchar()       getc(CONSOLE)
                     32: #define        putchar(ch)     putc(CONSOLE,(ch))
                     33: #define        fgetc(unit)     getc((unit))
                     34: #define        fputc(unit,ch)  putc((unit),(ch))

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