Updated WIN32 code specific sections. Changed header.

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

diff --git a/isam/physical.c b/isam/physical.c
index 9dccb47..3664ecf 100644 (file)
--- a/isam/physical.c
+++ b/isam/physical.c
@@ -1,10 +1,35 @@
 /*
- * Copyright (C) 1994, Index Data I/S 
+ * Copyright (C) 1994-1999, Index Data
  * All rights reserved.
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: physical.c,v $
- * Revision 1.7  1995-12-06 14:48:27  quinn
+ * Revision 1.15  1999-02-02 14:51:22  adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.14  1997/09/09 13:38:12  adam
+ * Partial port to WIN95/NT.
+ *
+ * Revision 1.13  1996/10/29 13:56:57  adam
+ * Include of zebrautl.h instead of alexutil.h.
+ *
+ * Revision 1.12  1996/03/20 16:17:11  quinn
+ * Bug hunting
+ *
+ * Revision 1.11  1996/03/20  13:29:17  quinn
+ * Bug-fix
+ *
+ * Revision 1.10  1996/03/19  19:22:44  quinn
+ * Fixed update-bug
+ *
+ * Revision 1.9  1996/02/06  10:19:57  quinn
+ * Attempt at fixing bug. Not all blocks were read before they were unlinked
+ * prior to a remap operation.
+ *
+ * Revision 1.8  1996/01/29  09:47:11  quinn
+ * Fixed mean little bug in the read-table code.
+ *
+ * Revision 1.7  1995/12/06  14:48:27  quinn
  * Fixed some strange bugs.
  *
  * Revision 1.6  1995/09/04  12:33:47  adam
@@ -33,7 +58,9 @@
 
 #include <assert.h>
 #include <stdio.h>
+#include <string.h>
 
+#include <log.h>
 #include <isam.h>
 
 static int is_freestore_alloc(ISAM is, int type)
@@ -78,7 +105,7 @@ int is_p_read_partial(is_mtable *tab, is_mblock *block)
     is_mbuf *buf;
 
     assert(block->state == IS_MBSTATE_UNREAD);
-    block->data = buf =  xmalloc_mbuf(IS_MBUF_TYPE_LARGE);
+    block->data = buf = xmalloc_mbuf(IS_MBUF_TYPE_LARGE);
     toread = tab->is->types[tab->pos_type].blocksize;
     if (toread > is_mbuf_size[buf->type])
     {
@@ -96,6 +123,7 @@ int is_p_read_partial(is_mtable *tab, is_mblock *block)
     /* extract header info */
     buf->offset = 0;
     memcpy(&block->num_records, buf->data, sizeof(block->num_records));
+    assert(block->num_records > 0);
     buf->offset += sizeof(block->num_records);
     memcpy(&block->nextpos, buf->data + buf->offset,
        sizeof(block->nextpos));
@@ -106,6 +134,9 @@ int is_p_read_partial(is_mtable *tab, is_mblock *block)
            sizeof(tab->num_records));
        buf->offset +=sizeof(tab->num_records);
     }
+    logf(LOG_DEBUG, "R: Block #%d: num %d nextpos %d total %d",
+        block->diskpos, block->num_records, block->nextpos,
+       block == tab->data ? tab->num_records : -1);
     buf->num = (toread - buf->offset) / is_keysize(tab->is);
     if (buf->num >= block->num_records)
     {
@@ -113,7 +144,7 @@ int is_p_read_partial(is_mtable *tab, is_mblock *block)
        block->state = IS_MBSTATE_CLEAN;
     }
     else
-       block->bread = buf->num * is_keysize(tab->is);
+       block->bread = buf->offset + buf->num * is_keysize(tab->is);
     return 0;
 }
 
@@ -197,10 +228,16 @@ void is_p_sync(is_mtable *tab)
                sizeof(tab->num_records));
            sum += sizeof(tab->num_records);
        }
+       logf (LOG_DEBUG, "W: Block #%d contains %d records.", p->diskpos,
+           p->num_records);
+       assert(p->num_records > 0);
        for (b = p->data; b; b = b->next)
        {
-           memcpy(type->dbuf + sum, b->data + b->offset, v = b->num *
-               is_keysize(tab->is));
+            logf(LOG_DEBUG, "   buf: offset %d, keys %d, type %d, ref %d",
+               b->offset, b->num, b->type, b->refcount);
+           if ((v = b->num * is_keysize(tab->is)) > 0)
+               memcpy(type->dbuf + sum, b->data + b->offset, v);
+
            sum += v;
            assert(sum <= type->blocksize);
        }
@@ -209,7 +246,6 @@ void is_p_sync(is_mtable *tab)
            logf (LOG_FATAL, "Failed to write block.");
            exit(1);
        }
-       logf (LOG_DEBUG, "W: Block #%d contains %d records.", p->diskpos, p->num_records);
     }
 }
 
@@ -221,11 +257,13 @@ void is_p_unmap(is_mtable *tab)
     is_mblock *p;
 
     for (p = tab->data; p; p = p->next)
+    {
        if (p->diskpos >= 0)
        {
            is_freestore_free(tab->is, tab->pos_type, p->diskpos);
            p->diskpos = -1;
        }
+    }
 }
 
 static is_mbuf *mbuf_takehead(is_mbuf **mb, int *num, int keysize)
@@ -287,9 +325,27 @@ void is_p_align(is_mtable *tab)
            }
            else
            {
-               tab->data = tab->data->next;
-               tab->data->state = IS_MBSTATE_DIRTY;
-               next = tab->data;
+               next = tab->data->next;
+               if (next)
+               {
+                   if (next->state < IS_MBSTATE_CLEAN)
+                   {
+                       if (is_p_read_full(tab, next) < 0)
+                       {
+                           logf(LOG_FATAL, "Error during re-alignment");
+                           abort();
+                       }
+                       if (next->nextpos && !next->next)
+                       {
+                           next->next = xmalloc_mblock();
+                           next->next->diskpos = next->nextpos;
+                           next->next->state = IS_MBSTATE_UNREAD;
+                           next->next->data = 0;
+                       }
+                   }
+                   next->state = IS_MBSTATE_DIRTY; /* force re-process */
+                   tab->data = next;
+               }
            }
            if (mblock->diskpos >= 0)
                is_freestore_free(tab->is, tab->pos_type, mblock->diskpos);