X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=dict%2Flookup.c;h=465479d38b556951cc718019a683fb084dc3a4af;hb=e172ced0dcc937dfc433a33c7e20962b9e6b5ea0;hp=0cb226048e433428efa6060d142755d6a174aa41;hpb=3c5ad6ec79e41c91b818e9953b08c6217795693d;p=idzebra-moved-to-github.git

diff --git a/dict/lookup.c b/dict/lookup.c
index 0cb2260..465479d 100644
--- a/dict/lookup.c
+++ b/dict/lookup.c
@@ -1,13 +1,26 @@
-/*
- * Copyright (C) 1994, Index Data I/S 
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: lookup.c,v $
- * Revision 1.1  1994-08-16 16:26:48  adam
- * Added dict.
- *
- */
+/* $Id: lookup.c,v 1.11 2002-08-02 19:26:55 adam Exp $
+   Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
+   Index Data Aps
+
+This file is part of the Zebra server.
+
+Zebra is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Zebra; see the file LICENSE.zebra.  If not, write to the
+Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+*/
+
+
 
 #include <stdlib.h>
 #include <string.h>
@@ -16,9 +29,77 @@
 
 #include <dict.h>
 
-int dict_lookup (Dict dict, Dict_char *p)
+static char *dict_look (Dict dict, const Dict_char *str, Dict_ptr ptr)
 {
-    return 0;
-}
+    int mid, lo, hi;
+    int cmp;
+    void *p;
+    short *indxp;
+    char *info;
+
+    dict_bf_readp (dict->dbf, ptr, &p);
+    mid = lo = 0;
+    hi = DICT_nodir(p)-1;
+    indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short));    
+    while (lo <= hi)
+    {
+        mid = (lo+hi)/2;
+        if (indxp[-mid] > 0)
+        {
+            /* string (Dict_char *) DICT_EOS terminated */
+            /* unsigned char        length of information */
+            /* char *               information */
+            info = (char*)p + indxp[-mid];
+            cmp = dict_strcmp((Dict_char*) info, str);
+            if (!cmp)
+                return info+(dict_strlen ((Dict_char*) info)+1)
+                    *sizeof(Dict_char);
+        }
+        else
+        {
+            Dict_char dc;
+            Dict_ptr subptr;
 
+            /* Dict_ptr             subptr */
+            /* Dict_char            sub char */
+            /* unsigned char        length of information */
+            /* char *               information */
+            info = (char*)p - indxp[-mid];
+            memcpy (&dc, info+sizeof(Dict_ptr), sizeof(Dict_char));
+            cmp = dc- *str;
+            if (!cmp)
+            {
+                memcpy (&subptr, info, sizeof(Dict_ptr));
+                if (*++str == DICT_EOS)
+                {
+                    if (info[sizeof(Dict_ptr)+sizeof(Dict_char)])
+                        return info+sizeof(Dict_ptr)+sizeof(Dict_char);
+                    return NULL;
+                }
+                else
+                {
+                    if (subptr == 0)
+                        return NULL;
+                    ptr = subptr;
+                    dict_bf_readp (dict->dbf, ptr, &p);
+                    mid = lo = 0;
+                    hi = DICT_nodir(p)-1;
+                    indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short));
+                    continue;
+                }
+            }
+        }
+        if (cmp < 0)
+            lo = mid+1;
+        else
+            hi = mid-1;
+    }
+    return NULL;
+}
 
+char *dict_lookup (Dict dict, const char *p)
+{
+    if (!dict->head.root)
+        return NULL;
+    return dict_look (dict, (const Dict_char *) p, dict->head.root);
+}