Merge mysql.com:/home/cps/mysql/trees/mysql-4.1

into  mysql.com:/home/cps/mysql/trees/mysql-5.0-virgin


sql/examples/ha_tina.cc:
  Auto merged
support-files/mysql.spec.sh:
  SCCS merged

1 files changed, 11 insertions, 11 deletions

diff --git a/sql/examples/ha_tina.cc b/sql/examples/ha_tina.cc
index 541e91f4b46..e00657c66ba 100644
--- a/sql/examples/ha_tina.cc
+++ b/sql/examples/ha_tina.cc
@@ -82,12 +82,16 @@ handlerton tina_hton= {
  ** TINA tables
  *****************************************************************************/
 
-/* 
-  Used for sorting  chains.
+/*
+  Used for sorting chains with qsort().
 */
 int sort_set (tina_set *a, tina_set *b)
 {
-  return ( a->begin > b->begin ? 1 : ( a->begin < b->begin ? -1 : 0 ) );
+  /*
+    We assume that intervals do not intersect. So, it is enought to compare
+    any two points. Here we take start of intervals for comparison.
+  */
+  return ( a->begin > b->begin ? -1 : ( a->begin < b->begin ? 1 : 0 ) );
 }
 
 static byte* tina_get_key(TINA_SHARE *share,uint *length,
@@ -186,7 +190,8 @@ static TINA_SHARE *get_share(const char *table_name, TABLE *table)
     thr_lock_init(&share->lock);
     pthread_mutex_init(&share->mutex,MY_MUTEX_INIT_FAST);
 
-    if ((share->data_file= my_open(data_file_name, O_RDWR, MYF(0))) == -1)
+    if ((share->data_file= my_open(data_file_name, O_RDWR|O_APPEND,
+                                   MYF(0))) == -1)
       goto error2;
 
     /* We only use share->data_file for writing, so we scan to the end to append */
@@ -797,13 +802,8 @@ int ha_tina::rnd_end()
     qsort(chain, (size_t)(chain_ptr - chain), sizeof(tina_set), (qsort_cmp)sort_set);
     for (ptr= chain; ptr < chain_ptr; ptr++)
     {
-      /* We peek a head to see if this is the last chain */
-      if (ptr+1 == chain_ptr)
-        memmove(share->mapped_file + ptr->begin, share->mapped_file + ptr->end,
-                length - (size_t)ptr->end);
-      else
-        memmove((caddr_t)share->mapped_file + ptr->begin, (caddr_t)share->mapped_file + ptr->end,
-                (size_t)((ptr++)->begin - ptr->end));
+      memmove(share->mapped_file + ptr->begin, share->mapped_file + ptr->end,
+              length - (size_t)ptr->end);
       length= length - (size_t)(ptr->end - ptr->begin);
     }