slow start on isam-d

[idzebra-moved-to-github.git] / isamc / merge-d.c

diff --git a/isamc/merge-d.c b/isamc/merge-d.c
index 47902e4..16032c8 100644 (file)
--- a/isamc/merge-d.c
+++ b/isamc/merge-d.c
@@ -31,19 +31,41 @@ static char *hexdump(unsigned char *p, int len, char *buff) {
 
 
 /* isamd - heikki's append-only isam 
-*/
+ *
+ * The record pointers arre kept in a linked list of buffers, as usual.
+ * When modifying the list, we just store diffs at the end of it (either
+ * in the only block, or in a separate block). Occasionally we have too
+ * many blocks, and then we merge the diffs into the list.
+ */
 
 
 
 ISAMD_P isamd_append (ISAMD is, ISAMD_P ipos, ISAMD_I data)
 {
-    
+  char i_item[128];    /* one input item */
+  char *i_ptr=i_item;
+  int i_more =1;
+  int i_mode;     /* 0 for delete, 1 for insert */ 
+
+  int retval=0;
+  
+  while (i_more)
+  {
+     i_ptr = i_item;
+     i_more = (*data->read_item)(data->clientData, &i_ptr, &i_mode); 
+     if (!retval)
+       memcpy(&retval,i_item, sizeof(retval));
+  }
+  return retval;
 } /*  isamh_append */
 
 
 /*
  * $Log: merge-d.c,v $
- * Revision 1.1  1999-07-14 13:14:47  heikki
+ * Revision 1.2  1999-07-14 15:05:30  heikki
+ * slow start on isam-d
+ *
+ * Revision 1.1  1999/07/14 13:14:47  heikki
  * Created empty
  *
  *