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<h1>contrib/openisis/ldb.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> openisis - an open implementation of the CDS/ISIS database</span>
<a name="l00003"></a>00003 <span class="comment"> Version 0.8.x (patchlevel see file Version)</span>
<a name="l00004"></a>00004 <span class="comment"> Copyright (C) 2001-2003 by Erik Grziwotz, erik@openisis.org</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00007"></a>00007 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span>
<a name="l00008"></a>00008 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00009"></a>00009 <span class="comment"> version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00014"></a>00014 <span class="comment"> Lesser General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> You should have received a copy of the GNU Lesser General Public</span>
<a name="l00017"></a>00017 <span class="comment"> License along with this library; if not, write to the Free Software</span>
<a name="l00018"></a>00018 <span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment"> see README for more information</span>
<a name="l00021"></a>00021 <span class="comment">EOH */</span>
<a name="l00022"></a>00022 <span class="preprocessor">#ifndef LDB_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="comment">/*</span>
<a name="l00025"></a>00025 <span class="comment"> $Id: ldb.h,v 1.19 2003/04/08 00:20:52 kripke Exp $</span>
<a name="l00026"></a>00026 <span class="comment"> package interface of the general db access functions.</span>
<a name="l00027"></a>00027 <span class="comment">*/</span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="preprocessor">#include "luti.h"</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include "lll.h"</span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="comment">/* #define LDB_MAGIC 0x0FE91515 read OPENISIS */</span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">enum</span> { <span class="comment">/* MFR members */</span>
<a name="l00036"></a>00036 LMFR_MFN = 1, <span class="comment">/* the rowid */</span>
<a name="l00037"></a>00037 LMFR_RECL, <span class="comment">/* total external length (even), negative for locked record */</span>
<a name="l00038"></a>00038 LMFR_BWB, <span class="comment">/* block of rec's previous version */</span>
<a name="l00039"></a>00039 LMFR_BWP, <span class="comment">/* pos of " */</span>
<a name="l00040"></a>00040 LMFR_BASE, <span class="comment">/* offset of contents area */</span>
<a name="l00041"></a>00041 LMFR_NVF, <span class="comment">/* number of fields */</span>
<a name="l00042"></a>00042 LMFR_STAT, <span class="comment">/* state, if != 0, about to be deleted */</span>
<a name="l00043"></a>00043 LMFR__FL, <span class="comment">/* offset of repeated part */</span>
<a name="l00044"></a>00044 LMFR_TAG = 0,
<a name="l00045"></a>00045 LMFR_POS,
<a name="l00046"></a>00046 LMFR_LEN,
<a name="l00047"></a>00047 LMFR__RL <span class="comment">/* length of repeated part */</span>
<a name="l00048"></a>00048 };
<a name="l00049"></a>00049
<a name="l00050"></a>00050
<a name="l00055"></a>00055 <span class="keyword">extern</span> <span class="keywordtype">int</span> *ldb_readRec ( <span class="keywordtype">int</span> db, <span class="keywordtype">int</span> rowid );
<a name="l00056"></a>00056
<a name="l00057"></a>00057
<a name="l00062"></a>00062 <span class="keyword">typedef</span> <span class="keywordtype">int</span> lxref;
<a name="l00063"></a>00063
<a name="l00064"></a>00064
<a name="l00069"></a>00069 <span class="keyword">extern</span> <span class="keywordtype">int</span> *ldb_readRecAtOff ( <span class="keywordtype">int</span> dbid, lxref off, <span class="keywordtype">int</span> *nxtoff );
<a name="l00070"></a>00070
<a name="l00071"></a>00071
<a name="l00072"></a>00072
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="comment">/*</span>
<a name="l00075"></a>00075 <span class="comment">** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</span>
<a name="l00076"></a>00076 <span class="comment">** detailed search structures and functions</span>
<a name="l00077"></a>00077 <span class="comment">**</span>
<a name="l00078"></a>00078 <span class="comment">** ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</span>
<a name="l00079"></a>00079 <span class="comment">*/</span>
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="keyword">enum</span> {
<a name="l00082"></a>00082 LDB_MAX_KEYLEN = 31, <span class="comment">/* actually, it's 30 for isis-1 */</span>
<a name="l00083"></a>00083 LDB_TERMBUF = 128, <span class="comment">/* ints */</span>
<a name="l00084"></a>00084 LDB_INDEXES = 2
<a name="l00085"></a>00085 };
<a name="l00086"></a>00086
<a name="l00087"></a>00087
<a name="l00111"></a><a class="code" href="unionLdbP.html">00111</a> <span class="keyword">typedef</span> <span class="keyword">union </span>{
<a name="l00112"></a>00112 <span class="keywordtype">char</span> bytes[8];
<a name="l00113"></a>00113 lll val;
<a name="l00114"></a>00114 } <a class="code" href="unionLdbP.html">LdbP</a>;
<a name="l00115"></a>00115
<a name="l00116"></a>00116
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">/* all macros operate on pointers */</span>
<a name="l00119"></a>00119 <span class="comment">/* access parts */</span>
<a name="l00120"></a>00120 <span class="preprocessor">#define LDBP_ROW( p ) (0xffffffL & (int)((p)->val >> 40))</span>
<a name="l00121"></a>00121 <span class="preprocessor"></span><span class="preprocessor">#define LDBP_TAG( p ) ( 0xffffL & (int)((p)->val >> 24))</span>
<a name="l00122"></a>00122 <span class="preprocessor"></span><span class="preprocessor">#define LDBP_POS( p ) (0xff7fffL & (int)((p)->val))</span>
<a name="l00123"></a>00123 <span class="preprocessor"></span><span class="preprocessor">#define LDBP_MARK( p ) ( 0x8000 & (int)((p)->val))</span>
<a name="l00124"></a>00124 <span class="preprocessor"></span>
<a name="l00125"></a>00125 <span class="preprocessor">#define LDBP_SETMARK( p ) ((p)->val |= LLL( 0x8000))</span>
<a name="l00126"></a>00126 <span class="preprocessor"></span><span class="preprocessor">#define LDBP_CLRMARK( p ) ((p)->val &= LLL(0xffffffffffff7fff))</span>
<a name="l00127"></a>00127 <span class="preprocessor"></span><span class="comment">/* value w/o the mark bit */</span>
<a name="l00128"></a>00128 <span class="preprocessor">#define LDBP_IGNMARK( p ) ((p)->val & LLL(0xffffffffffff7fff))</span>
<a name="l00129"></a>00129 <span class="preprocessor"></span>
<a name="l00130"></a>00130 <span class="comment">/* compare according to rowid, tag, pos */</span>
<a name="l00131"></a>00131 <span class="preprocessor">#define LDBP_EQ( a, b ) ((a)->val == (b)->val)</span>
<a name="l00132"></a>00132 <span class="preprocessor"></span><span class="preprocessor">#define LDBP_GT( a, b ) ((a)->val > (b)->val)</span>
<a name="l00133"></a>00133 <span class="preprocessor"></span><span class="comment">/* compare IGNORING MARK according to rowid, tag, pos */</span>
<a name="l00134"></a>00134 <span class="preprocessor">#define LDBP_EQM( a, b ) (LDBP_IGNMARK(a) == LDBP_IGNMARK(b))</span>
<a name="l00135"></a>00135 <span class="preprocessor"></span><span class="preprocessor">#define LDBP_GTM( a, b ) (LDBP_IGNMARK(a) > LDBP_IGNMARK(b))</span>
<a name="l00136"></a>00136 <span class="preprocessor"></span>
<a name="l00137"></a>00137 <span class="comment">/* manipulation: set bottom / top for row of given posting */</span>
<a name="l00138"></a>00138 <span class="preprocessor">#define LDBP_SETROWBOT( d, s ) ((d)->val = (s)->val & LLL(0xffffff0000000000))</span>
<a name="l00139"></a>00139 <span class="preprocessor"></span><span class="preprocessor">#define LDBP_SETROWTOP( d, s ) ((d)->val = (s)->val | LLL( 0xffffffffff))</span>
<a name="l00140"></a>00140 <span class="preprocessor"></span>
<a name="l00141"></a>00141
<a name="l00147"></a><a class="code" href="structLdbPost.html">00147</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00148"></a>00148 <span class="keywordtype">short</span> mode; <span class="comment">/* in: merge flags */</span>
<a name="l00149"></a>00149 <span class="keywordtype">short</span> near; <span class="comment">/* in: near distance; in OR mode: collect pos info */</span>
<a name="l00150"></a>00150 <span class="keywordtype">int</span> tag; <span class="comment">/* in: tag, to which postings are restricted */</span>
<a name="l00151"></a>00151 <span class="keywordtype">int</span> skp; <span class="comment">/* in: ignore mfns < skp */</span>
<a name="l00152"></a>00152 <span class="keywordtype">int</span> len; <span class="comment">/* in: length (# of postings) of buffer (if 0 : default length) */</span>
<a name="l00153"></a>00153 <span class="keywordtype">int</span> fil; <span class="comment">/* io: number of postings actually used */</span>
<a name="l00154"></a>00154 <span class="keywordtype">int</span> cut; <span class="comment">/* io: min mfn ignored due to buffer length */</span>
<a name="l00155"></a>00155 <a class="code" href="unionLdbP.html">LdbP</a> p[OPENISIS_SETLEN];
<a name="l00160"></a>00160 } <a class="code" href="structLdbPost.html">LdbPost</a>;
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="keyword">enum</span> {
<a name="l00163"></a>00163 LDB_OR,
<a name="l00164"></a>00164 LDB_AND,
<a name="l00165"></a>00165 LDB_NOT, <span class="comment">/* like AND, but keep unmarked postings */</span>
<a name="l00166"></a>00166 LDB_PFX = 4, <span class="comment">/* prefix match */</span>
<a name="l00167"></a>00167 LDB_KEEPMARKS = 8 <span class="comment">/* do not compact after AND/NOT */</span>
<a name="l00168"></a>00168 };
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="keyword">enum</span> {
<a name="l00171"></a>00171 LDB_NEAR_F = 0x7fff, <span class="comment">/* the (F): same occurence of field */</span>
<a name="l00172"></a>00172 LDB_NEAR_G = -0x8000 <span class="comment">/* the (G): same field */</span>
<a name="l00173"></a>00173 };
<a name="l00174"></a>00174
<a name="l00177"></a>00177 <span class="keyword">extern</span> <span class="keywordtype">int</span> ldb_search ( <span class="keywordtype">int</span> db, <span class="keyword">const</span> <span class="keywordtype">char</span> *key, <a class="code" href="structLdbPost.html">LdbPost</a> *post,
<a name="l00178"></a>00178 <a class="code" href="structOpenIsisRec.html">OpenIsisRec</a> *rec );
<a name="l00179"></a>00179
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="keyword">extern</span> <span class="keywordtype">int</span> ldb_p2s ( <a class="code" href="structOpenIsisSet.html">OpenIsisSet</a> *<span class="keyword">set</span>, <a class="code" href="structLdbPost.html">LdbPost</a> *post );
<a name="l00182"></a>00182
<a name="l00183"></a>00183 <span class="keyword">extern</span> <a class="code" href="structDb.html">Db</a>* ldb_getdb (<span class="keywordtype">int</span> dbid);
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <span class="preprocessor">#define LDB_H</span>
<a name="l00186"></a>00186 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* LDB_H */</span>
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