ramread.c

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/* ramread.c  -  ramread */

#include <xinu.h>
#include <ramdisk.h>

/*------------------------------------------------------------------------
 * ramread  -  Read a block from a ram disk
 *------------------------------------------------------------------------
 */
devcall ramread (
      struct dentry *devptr,    /* Entry in device switch table */
      char  *buff,          /* Buffer to hold disk block    */
      int32 blk         /* Block number of block to read*/
    )
{
    int32   bpos;           /* Byte position of blk     */

    bpos = RM_BLKSIZ * blk;
    memcpy(buff, &Ram.disk[bpos], RM_BLKSIZ);
    return OK;
}