-/*
- * Copyright (C) 1994-1999, Index Data
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: scan.c,v $
- * Revision 1.12 1999-02-02 14:50:28 adam
- * Updated WIN32 code specific sections. Changed header.
- *
- * Revision 1.11 1998/06/22 11:34:45 adam
- * Changed scan callback function so it doesn't stop further scanning.
- *
- * Revision 1.10 1998/03/06 16:58:04 adam
- * Fixed bug which related to scanning of large indexes.
- *
- * Revision 1.9 1997/10/27 14:33:04 adam
- * Moved towards generic character mapping depending on "structure"
- * field in abstract syntax file. Fixed a few memory leaks. Fixed
- * bug with negative integers when doing searches with relational
- * operators.
- *
- * Revision 1.8 1996/02/02 13:43:52 adam
- * The public functions simply use char instead of Dict_char to represent
- * search strings. Dict_char is used internally only.
- *
- * Revision 1.7 1995/12/11 09:04:50 adam
- * Bug fix: the lookup/scan/lookgrep didn't handle empty dictionary.
- *
- * Revision 1.6 1995/11/20 11:58:04 adam
- * Support for YAZ in standard located directories, such as /usr/local/..
- *
- * Revision 1.5 1995/10/09 16:18:32 adam
- * Function dict_lookup_grep got extra client data parameter.
- *
- * Revision 1.4 1995/10/06 13:52:00 adam
- * Bug fixes. Handler may abort further scanning.
- *
- * Revision 1.3 1995/10/06 11:06:07 adam
- * Bug fixes.
- *
- * Revision 1.2 1995/10/06 10:43:16 adam
- * Minor changes.
- *
- * Revision 1.1 1995/10/06 09:04:18 adam
- * First version of scan.
- *
- */
+/* This file is part of the Zebra server.
+ Copyright (C) 1994-2011 Index Data
+
+ 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 this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+*/
+
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
-#include <dict.h>
+#include "dict-p.h"
-int dict_scan_trav (Dict dict, Dict_ptr ptr, int pos, Dict_char *str,
- int start, int *count, void *client,
- int (*userfunc)(char *, const char *, int, void *),
- int dir)
+static void scan_direction(Dict dict, Dict_ptr ptr, int pos, Dict_char *str,
+ int start, int *count, void *client,
+ int (*userfunc)(char *, const char *, int, void *),
+ int dir)
{
int lo, hi, j;
void *p;
short *indxp;
char *info;
- dict_bf_readp (dict->dbf, ptr, &p);
+ dict_bf_readp(dict->dbf, ptr, &p);
hi = DICT_nodir(p)-1;
- if (start == 0 && dir == -1)
- lo = hi;
- else
+ if (start != -1)
lo = start;
- indxp = (short*) ((char*) p+DICT_pagesize(dict)-sizeof(short));
+ else
+ {
+ if (dir == -1)
+ lo = hi;
+ else
+ lo = 0;
+ }
+ indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short));
while (lo <= hi && lo >= 0 && *count > 0)
{
for (j = 0; info[j] != DICT_EOS; j++)
str[pos+j] = info[j];
str[pos+j] = DICT_EOS;
- (*userfunc)((char*) str, info+(j+1)*sizeof(Dict_char),
- *count * dir, client);
- --(*count);
+ if ((*userfunc)((char*) str, info+(j+1)*sizeof(Dict_char),
+ *count * dir, client))
+ {
+ *count = 0;
+ }
+ else
+ --(*count);
}
else
{
/* char * information */
info = (char*)p - indxp[-lo];
- memcpy (&dc, info+sizeof(Dict_ptr), sizeof(Dict_char));
+ memcpy(&dc, info+sizeof(Dict_ptr), sizeof(Dict_char));
str[pos] = dc;
- memcpy (&subptr, info, sizeof(Dict_ptr));
- if (info[sizeof(Dict_ptr)+sizeof(Dict_char)])
+ memcpy(&subptr, info, sizeof(Dict_ptr));
+ if (dir>0 && info[sizeof(Dict_ptr)+sizeof(Dict_char)])
{
- str[pos+1] = DICT_EOS;
- if ((*userfunc)((char*) str,
- info+sizeof(Dict_ptr)+sizeof(Dict_char),
- *count * dir, client))
- return 1;
- --(*count);
+ str[pos+1] = DICT_EOS;
+ if ((*userfunc)((char*) str,
+ info+sizeof(Dict_ptr)+sizeof(Dict_char),
+ *count * dir, client))
+ {
+ *count = 0;
+ }
+ else
+ --(*count);
}
- if (*count > 0 && subptr)
+ if (*count>0 && subptr)
{
- dict_scan_trav (dict, subptr, pos+1, str, 0, count,
- client, userfunc, dir);
- dict_bf_readp (dict->dbf, ptr, &p);
- indxp = (short*) ((char*) p+DICT_pagesize(dict)-sizeof(short));
+ scan_direction(dict, subptr, pos+1, str, -1, count,
+ client, userfunc, dir);
+ dict_bf_readp(dict->dbf, ptr, &p);
+ indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short));
}
+ if (*count>0 && dir<0 && info[sizeof(Dict_ptr)+sizeof(Dict_char)])
+ {
+ str[pos+1] = DICT_EOS;
+ if ((*userfunc)((char*) str,
+ info+sizeof(Dict_ptr)+sizeof(Dict_char),
+ *count * dir, client))
+ {
+ *count = 0;
+ }
+ else
+ --(*count);
+ }
}
lo += dir;
}
- return 0;
}
-int dict_scan_r (Dict dict, Dict_ptr ptr, int pos, Dict_char *str,
+void dict_scan_r(Dict dict, Dict_ptr ptr, int pos, Dict_char *str,
int *before, int *after, void *client,
int (*userfunc)(char *, const char *, int, void *))
{
short *indxp;
char *info;
- dict_bf_readp (dict->dbf, ptr, &p);
+ dict_bf_readp(dict->dbf, ptr, &p);
if (!p)
- return 0;
+ return;
mid = lo = 0;
hi = DICT_nodir(p)-1;
- indxp = (short*) ((char*) p+DICT_pagesize(dict)-sizeof(short));
+ indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short));
while (lo <= hi)
{
mid = (lo+hi)/2;
/* unsigned char length of information */
/* char * information */
info = (char*)p + indxp[-mid];
- cmp = dict_strcmp ((Dict_char*) info, str + pos);
+ cmp = dict_strcmp((Dict_char*) info, str + pos);
if (!cmp)
{
if (*after)
{
- (*userfunc)((char *) str, info+
- (dict_strlen((Dict_char*) info)+1)
- *sizeof(Dict_char),
- *after, client);
- --(*after);
+ if ((*userfunc)((char *) str, info+
+ (dict_strlen((Dict_char*) info)+1)
+ *sizeof(Dict_char),
+ *after, client))
+ {
+ *after = 0;
+ }
+ else
+ --(*after);
}
break;
}
/* unsigned char length of information */
/* char * information */
info = (char*)p - indxp[-mid];
- memcpy (&dc, info+sizeof(Dict_ptr), sizeof(Dict_char));
+ memcpy(&dc, info+sizeof(Dict_ptr), sizeof(Dict_char));
cmp = dc - str[pos];
if (!cmp)
{
- memcpy (&subptr, info, sizeof(Dict_ptr));
+ memcpy(&subptr, info, sizeof(Dict_ptr));
if (str[pos+1] == DICT_EOS)
{
if (info[sizeof(Dict_ptr)+sizeof(Dict_char)])
{
if (*after)
{
- (*userfunc)((char*) str,
- info+sizeof(Dict_ptr)+
- sizeof(Dict_char),
- *after, client);
- --(*after);
+ if ((*userfunc)((char*) str,
+ info+sizeof(Dict_ptr)+
+ sizeof(Dict_char),
+ *after, client))
+ {
+ *after = 0;
+ }
+ else
+ --(*after);
}
}
if (*after && subptr)
- if (dict_scan_trav (dict, subptr, pos+1, str, 0,
- after, client, userfunc, 1))
- return 1;
+ scan_direction(dict, subptr, pos+1, str, -1,
+ after, client, userfunc, 1);
}
- else if (subptr)
+ else
{
- if (dict_scan_r (dict, subptr, pos+1, str, before, after,
- client, userfunc))
- return 1;
+ if (subptr)
+ dict_scan_r(dict, subptr, pos+1, str, before, after,
+ client, userfunc);
+ if (info[sizeof(Dict_ptr)+sizeof(Dict_char)])
+ {
+ if (*before)
+ {
+ str[pos+1] = DICT_EOS;
+ if ((*userfunc)((char*) str,
+ info+sizeof(Dict_ptr)+
+ sizeof(Dict_char),
+ - *before, client))
+ {
+ *before = 0;
+ }
+ else
+ --(*before);
+ }
+ }
}
break;
}
if (lo>hi && cmp < 0)
++mid;
if (*after)
- if (dict_scan_trav (dict, ptr, pos, str, cmp ? mid : mid+1, after,
- client, userfunc, 1))
- return 1;
- if (*before && mid > 1)
- if (dict_scan_trav (dict, ptr, pos, str, mid-1, before,
- client, userfunc, -1))
- return 1;
- return 0;
+ scan_direction(dict, ptr, pos, str, cmp ? mid : mid+1, after,
+ client, userfunc, 1);
+ if (*before && mid > 0)
+ scan_direction(dict, ptr, pos, str, mid-1, before,
+ client, userfunc, -1);
}
-int dict_scan (Dict dict, char *str, int *before, int *after, void *client,
- int (*f)(char *name, const char *info, int pos, void *client))
+int dict_scan(Dict dict, char *str, int *before, int *after, void *client,
+ int (*f)(char *name, const char *info, int pos, void *client))
{
int i;
- logf (LOG_DEBUG, "dict_scan");
+ yaz_log(YLOG_DEBUG, "dict_scan");
for (i = 0; str[i]; i++)
{
- logf (LOG_DEBUG, " %3d %c", str[i],
- (str[i] > ' ' && str[i] < 127) ? str[i] : '?');
+ yaz_log(YLOG_DEBUG, "start_term pos %d %3d %c", i, str[i],
+ (str[i] > ' ' && str[i] < 127) ? str[i] : '?');
}
- if (dict->head.last <= 1)
+ if (!dict->head.root)
return 0;
- return dict_scan_r (dict, 1, 0, (Dict_char *) str, before, after, client,
- f);
+ dict_scan_r(dict, dict->head.root, 0, (Dict_char *) str,
+ before, after, client, f);
+ return 0;
}
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
projects / idzebra-moved-to-github.git / blobdiff