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Fixed silly mistake in cluster index calculation.

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git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@899 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2004-04-24 16:02:39 +00:00
parent 490a27b857
commit 6f7b41e257
1 changed files with 2 additions and 2 deletions
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4
kernel/fattab.c
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@ -177,7 +177,7 @@ unsigned link_fat(struct dpb FAR * dpbp, CLUSTER Cluster1,
/* form an index so that we can read the block as a */
/* byte array */
idx = (((unsigned)Cluster1 << 1) + (unsigned)Cluster1) % dpbp->dpb_secsize;
idx = (((unsigned)Cluster1 >> 1) + (unsigned)Cluster1) % dpbp->dpb_secsize;
/* Test to see if the cluster straddles the block. If */
/* it does, get the next block and use both to form the */
@ -294,7 +294,7 @@ CLUSTER next_cluster(struct dpb FAR * dpbp, CLUSTER ClusterNum)
/* form an index so that we can read the block as a */
/* byte array */
idx = ((((unsigned)ClusterNum << 1) + (unsigned)ClusterNum) >> 1) %
idx = (((unsigned)ClusterNum >> 1) + (unsigned)ClusterNum) %
dpbp->dpb_secsize;
clusterbuff.bytes[0] = bp->b_buffer[idx];