1 files changed, 25 insertions, 0 deletions
diff --git a/src/libbio/boffset.c b/src/libbio/boffset.c
new file mode 100644
index 00000000..df28aaf7
--- /dev/null
+++ b/src/libbio/boffset.c
@@ -0,0 +1,25 @@
+#include	"lib9.h"
+#include	<bio.h>
+
+off_t
+Boffset(Biobuf *bp)
+{
+	off_t n;
+
+	switch(bp->state) {
+	default:
+		fprint(2, "Boffset: unknown state %d\n", bp->state);
+		n = Beof;
+		break;
+
+	case Bracteof:
+	case Bractive:
+		n = bp->offset + bp->icount;
+		break;
+
+	case Bwactive:
+		n = bp->offset + (bp->bsize + bp->ocount);
+		break;
+	}
+	return n;
+}