Enabled retrieval of zebra metadata in XML when element set names used

[idzebra-moved-to-github.git] / index / recindex.c

diff --git a/index/recindex.c b/index/recindex.c
index 64eea73..10327c0 100644 (file)
--- a/index/recindex.c
+++ b/index/recindex.c
@@ -1,4 +1,4 @@
-/* $Id: recindex.c,v 1.36 2004-08-06 12:28:22 adam Exp $
+/* $Id: recindex.c,v 1.38 2004-09-26 20:19:44 adam Exp $
    Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004
    Index Data Aps
 
@@ -20,16 +20,17 @@ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 02111-1307, USA.
 */
 
+#define RIDX_CHUNK 128
 
 /*
  *  Format of first block
- *      next       (4 bytes)
- *      ref_count  (4 bytes)
- *      block      (504 bytes)
+ *      next       (8 bytes)
+ *      ref_count  (2 bytes)
+ *      block      (500 bytes)
  *
  *  Format of subsequent blocks 
- *      next  (4 bytes)
- *      block (508 bytes)
+ *      next  (8 bytes)
+ *      block (502 bytes)
  *
  *  Format of each record
  *      sysno
@@ -76,8 +77,15 @@ static int read_indx (Records p, SYSNO sysno, void *buf, int itemsize,
 {
     int r;
     zint pos = (sysno-1)*itemsize;
+    int off = (int) (pos%RIDX_CHUNK);
+    int sz1 = RIDX_CHUNK - off;    /* sz1 is size of buffer to read.. */
 
-    r = bf_read (p->index_BFile, 1+pos/128, (int) (pos%128), itemsize, buf);
+    if (sz1 > itemsize)
+       sz1 = itemsize;  /* no more than itemsize bytes */
+
+    r = bf_read (p->index_BFile, 1+pos/RIDX_CHUNK, off, sz1, buf);
+    if (r == 1 && sz1 < itemsize) /* boundary? - must read second part */
+       r = bf_read (p->index_BFile, 2+pos/RIDX_CHUNK, 0, itemsize - sz1, buf + sz1);
     if (r != 1 && !ignoreError)
     {
         logf (LOG_FATAL|LOG_ERRNO, "read in %s at pos %ld",
@@ -90,15 +98,22 @@ static int read_indx (Records p, SYSNO sysno, void *buf, int itemsize,
 static void write_indx (Records p, SYSNO sysno, void *buf, int itemsize)
 {
     zint pos = (sysno-1)*itemsize;
+    int off = (int) (pos%RIDX_CHUNK);
+    int sz1 = RIDX_CHUNK - off;    /* sz1 is size of buffer to read.. */
+
+    if (sz1 > itemsize)
+       sz1 = itemsize;  /* no more than itemsize bytes */
 
-    bf_write (p->index_BFile, 1+pos/128, (int) (pos%128), itemsize, buf);
+    bf_write(p->index_BFile, 1+pos/RIDX_CHUNK, off, sz1, buf);
+    if (sz1 < itemsize)   /* boundary? must write second part */
+       bf_write(p->index_BFile, 2+pos/RIDX_CHUNK, 0, itemsize - sz1, buf + sz1);
 }
 
 static void rec_release_blocks (Records p, SYSNO sysno)
 {
     struct record_index_entry entry;
     zint freeblock;
-    char block_and_ref[sizeof(short) + sizeof(zint)];
+    char block_and_ref[sizeof(zint) + sizeof(short)];
     int dst_type;
     int first = 1;
 
@@ -113,7 +128,8 @@ static void rec_release_blocks (Records p, SYSNO sysno)
     while (freeblock)
     {
         if (bf_read (p->data_BFile[dst_type], freeblock, 0,
-                    sizeof(block_and_ref), block_and_ref) != 1)
+                    first ? sizeof(block_and_ref) : sizeof(zint),
+                    block_and_ref) != 1)
         {
             logf (LOG_FATAL|LOG_ERRNO, "read in rec_del_single");
             exit (1);
@@ -231,7 +247,7 @@ Records rec_open (BFiles bfs, int rw, int compression_method)
     p->tmp_size = 1024;
     p->tmp_buf = (char *) xmalloc (p->tmp_size);
     p->index_fname = "reci";
-    p->index_BFile = bf_open (bfs, p->index_fname, 128, rw);
+    p->index_BFile = bf_open (bfs, p->index_fname, RIDX_CHUNK, rw);
     if (p->index_BFile == NULL)
     {
         logf (LOG_FATAL|LOG_ERRNO, "open %s", p->index_fname);