Most of the functionality in place.

[idzebra-moved-to-github.git] / isam / rootblk.c

diff --git a/isam/rootblk.c b/isam/rootblk.c
new file mode 100644 (file)
index 0000000..25c1a82
--- /dev/null
+++ b/isam/rootblk.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 1994, Index Data I/S 
+ * All rights reserved.
+ * Sebastian Hammer, Adam Dickmeiss
+ *
+ * $Log: rootblk.c,v $
+ * Revision 1.1  1994-09-26 16:08:00  quinn
+ * Most of the functionality in place.
+ *
+ */
+
+/*
+ * Read and write the blocktype header.
+ */
+
+#include <isam.h>
+#include "rootblk.h"
+
+int is_rb_write(isam_blocktype *ib, is_type_header *hd)
+{
+    int pt = 0, ct = 0, towrite;
+
+    while ((towrite = sizeof(*hd) - pt) > 0)
+    {
+       if (towrite > bf_blocksize(ib->bf))
+               towrite = bf_blocksize(ib->bf);
+       if (bf_write(ib->bf, ct, 0, towrite, (char *)hd + pt) < 0)
+           return -1;
+       pt += bf_blocksize(ib->bf);
+       ct++;
+    }
+    return ct;
+}
+
+int is_rb_read(isam_blocktype *ib, is_type_header *hd)
+{
+    int pt = 0, ct = 0, rs, toread;
+
+    while ((toread = sizeof(*hd) - pt) > 0)
+    {
+       if (toread > bf_blocksize(ib->bf))
+           toread = bf_blocksize(ib->bf);
+       if ((rs = bf_read(ib->bf, ct, 0, toread, (char*)hd + pt)) <= 0)
+           return rs;
+       pt += bf_blocksize(ib->bf);
+       ct++;
+    }
+    return ct;
+}