ttywrite.c

Go to the documentation of this file.

/* ttywrite.c - ttywrite */

#include <xinu.h>

/*------------------------------------------------------------------------
 *  ttywrite  -  Write character(s) to a tty device (interrupts disabled)
 *------------------------------------------------------------------------
 */
devcall ttywrite(
      struct dentry *devptr,    /* Entry in device switch table */
      char  *buff,          /* Buffer of characters     */
      int32 count           /* Count of character to write  */
    )
{
    /* Handle negative and zero counts */

    if (count < 0) {
        return SYSERR;
    } else if (count == 0){
        return OK;
    }

    /* Write count characters one at a time */

    for (; count>0 ; count--) {
        ttyputc(devptr, *buff++);
    }
    return OK;
}