585 lines
16 KiB
C
585 lines
16 KiB
C
/*
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** 2011 Jun 13
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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******************************************************************************
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**
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** This file is not part of the production FTS code. It is only used for
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** testing. It contains a Tcl command that can be used to test if a document
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** matches an FTS NEAR expression.
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**
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** As of March 2012, it also contains a version 1 tokenizer used for testing
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** that the sqlite3_tokenizer_module.xLanguage() method is invoked correctly.
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*/
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#include <tcl.h>
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#include <string.h>
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#include <assert.h>
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#if defined(SQLITE_TEST)
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#if defined(SQLITE_ENABLE_FTS3) || defined(SQLITE_ENABLE_FTS4)
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/* Required so that the "ifdef SQLITE_ENABLE_FTS3" below works */
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#include "fts3Int.h"
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#define NM_MAX_TOKEN 12
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typedef struct NearPhrase NearPhrase;
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typedef struct NearDocument NearDocument;
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typedef struct NearToken NearToken;
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struct NearDocument {
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int nToken; /* Length of token in bytes */
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NearToken *aToken; /* Token array */
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};
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struct NearToken {
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int n; /* Length of token in bytes */
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const char *z; /* Pointer to token string */
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};
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struct NearPhrase {
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int nNear; /* Preceding NEAR value */
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int nToken; /* Number of tokens in this phrase */
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NearToken aToken[NM_MAX_TOKEN]; /* Array of tokens in this phrase */
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};
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static int nm_phrase_match(
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NearPhrase *p,
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NearToken *aToken
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){
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int ii;
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for(ii=0; ii<p->nToken; ii++){
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NearToken *pToken = &p->aToken[ii];
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if( pToken->n>0 && pToken->z[pToken->n-1]=='*' ){
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if( aToken[ii].n<(pToken->n-1) ) return 0;
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if( memcmp(aToken[ii].z, pToken->z, pToken->n-1) ) return 0;
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}else{
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if( aToken[ii].n!=pToken->n ) return 0;
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if( memcmp(aToken[ii].z, pToken->z, pToken->n) ) return 0;
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}
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}
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return 1;
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}
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static int nm_near_chain(
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int iDir, /* Direction to iterate through aPhrase[] */
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NearDocument *pDoc, /* Document to match against */
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int iPos, /* Position at which iPhrase was found */
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int nPhrase, /* Size of phrase array */
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NearPhrase *aPhrase, /* Phrase array */
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int iPhrase /* Index of phrase found */
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){
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int iStart;
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int iStop;
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int ii;
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int nNear;
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int iPhrase2;
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NearPhrase *p;
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NearPhrase *pPrev;
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assert( iDir==1 || iDir==-1 );
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if( iDir==1 ){
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if( (iPhrase+1)==nPhrase ) return 1;
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nNear = aPhrase[iPhrase+1].nNear;
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}else{
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if( iPhrase==0 ) return 1;
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nNear = aPhrase[iPhrase].nNear;
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}
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pPrev = &aPhrase[iPhrase];
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iPhrase2 = iPhrase+iDir;
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p = &aPhrase[iPhrase2];
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iStart = iPos - nNear - p->nToken;
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iStop = iPos + nNear + pPrev->nToken;
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if( iStart<0 ) iStart = 0;
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if( iStop > pDoc->nToken - p->nToken ) iStop = pDoc->nToken - p->nToken;
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for(ii=iStart; ii<=iStop; ii++){
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if( nm_phrase_match(p, &pDoc->aToken[ii]) ){
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if( nm_near_chain(iDir, pDoc, ii, nPhrase, aPhrase, iPhrase2) ) return 1;
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}
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}
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return 0;
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}
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static int nm_match_count(
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NearDocument *pDoc, /* Document to match against */
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int nPhrase, /* Size of phrase array */
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NearPhrase *aPhrase, /* Phrase array */
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int iPhrase /* Index of phrase to count matches for */
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){
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int nOcc = 0;
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int ii;
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NearPhrase *p = &aPhrase[iPhrase];
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for(ii=0; ii<(pDoc->nToken + 1 - p->nToken); ii++){
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if( nm_phrase_match(p, &pDoc->aToken[ii]) ){
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/* Test forward NEAR chain (i>iPhrase) */
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if( 0==nm_near_chain(1, pDoc, ii, nPhrase, aPhrase, iPhrase) ) continue;
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/* Test reverse NEAR chain (i<iPhrase) */
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if( 0==nm_near_chain(-1, pDoc, ii, nPhrase, aPhrase, iPhrase) ) continue;
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/* This is a real match. Increment the counter. */
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nOcc++;
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}
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}
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return nOcc;
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}
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/*
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** Tclcmd: fts3_near_match DOCUMENT EXPR ?OPTIONS?
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*/
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static int fts3_near_match_cmd(
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ClientData clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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int nTotal = 0;
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int rc;
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int ii;
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int nPhrase;
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NearPhrase *aPhrase = 0;
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NearDocument doc = {0, 0};
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Tcl_Obj **apDocToken;
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Tcl_Obj *pRet;
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Tcl_Obj *pPhrasecount = 0;
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Tcl_Obj **apExprToken;
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int nExprToken;
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UNUSED_PARAMETER(clientData);
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/* Must have 3 or more arguments. */
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if( objc<3 || (objc%2)==0 ){
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Tcl_WrongNumArgs(interp, 1, objv, "DOCUMENT EXPR ?OPTION VALUE?...");
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rc = TCL_ERROR;
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goto near_match_out;
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}
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for(ii=3; ii<objc; ii+=2){
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enum NM_enum { NM_PHRASECOUNTS };
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struct TestnmSubcmd {
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char *zName;
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enum NM_enum eOpt;
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} aOpt[] = {
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{ "-phrasecountvar", NM_PHRASECOUNTS },
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{ 0, 0 }
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};
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int iOpt;
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if( Tcl_GetIndexFromObjStruct(
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interp, objv[ii], aOpt, sizeof(aOpt[0]), "option", 0, &iOpt)
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){
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return TCL_ERROR;
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}
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switch( aOpt[iOpt].eOpt ){
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case NM_PHRASECOUNTS:
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pPhrasecount = objv[ii+1];
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break;
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}
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}
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rc = Tcl_ListObjGetElements(interp, objv[1], &doc.nToken, &apDocToken);
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if( rc!=TCL_OK ) goto near_match_out;
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doc.aToken = (NearToken *)ckalloc(doc.nToken*sizeof(NearToken));
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for(ii=0; ii<doc.nToken; ii++){
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doc.aToken[ii].z = Tcl_GetStringFromObj(apDocToken[ii], &doc.aToken[ii].n);
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}
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rc = Tcl_ListObjGetElements(interp, objv[2], &nExprToken, &apExprToken);
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if( rc!=TCL_OK ) goto near_match_out;
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nPhrase = (nExprToken + 1) / 2;
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aPhrase = (NearPhrase *)ckalloc(nPhrase * sizeof(NearPhrase));
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memset(aPhrase, 0, nPhrase * sizeof(NearPhrase));
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for(ii=0; ii<nPhrase; ii++){
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Tcl_Obj *pPhrase = apExprToken[ii*2];
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Tcl_Obj **apToken;
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int nToken;
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int jj;
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rc = Tcl_ListObjGetElements(interp, pPhrase, &nToken, &apToken);
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if( rc!=TCL_OK ) goto near_match_out;
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if( nToken>NM_MAX_TOKEN ){
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Tcl_AppendResult(interp, "Too many tokens in phrase", 0);
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rc = TCL_ERROR;
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goto near_match_out;
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}
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for(jj=0; jj<nToken; jj++){
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NearToken *pT = &aPhrase[ii].aToken[jj];
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pT->z = Tcl_GetStringFromObj(apToken[jj], &pT->n);
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}
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aPhrase[ii].nToken = nToken;
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}
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for(ii=1; ii<nPhrase; ii++){
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Tcl_Obj *pNear = apExprToken[2*ii-1];
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int nNear;
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rc = Tcl_GetIntFromObj(interp, pNear, &nNear);
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if( rc!=TCL_OK ) goto near_match_out;
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aPhrase[ii].nNear = nNear;
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}
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pRet = Tcl_NewObj();
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Tcl_IncrRefCount(pRet);
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for(ii=0; ii<nPhrase; ii++){
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int nOcc = nm_match_count(&doc, nPhrase, aPhrase, ii);
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Tcl_ListObjAppendElement(interp, pRet, Tcl_NewIntObj(nOcc));
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nTotal += nOcc;
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}
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if( pPhrasecount ){
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Tcl_ObjSetVar2(interp, pPhrasecount, 0, pRet, 0);
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}
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Tcl_DecrRefCount(pRet);
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Tcl_SetObjResult(interp, Tcl_NewBooleanObj(nTotal>0));
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near_match_out:
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ckfree((char *)aPhrase);
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ckfree((char *)doc.aToken);
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return rc;
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}
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/*
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** Tclcmd: fts3_configure_incr_load ?CHUNKSIZE THRESHOLD?
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**
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** Normally, FTS uses hard-coded values to determine the minimum doclist
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** size eligible for incremental loading, and the size of the chunks loaded
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** when a doclist is incrementally loaded. This command allows the built-in
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** values to be overridden for testing purposes.
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**
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** If present, the first argument is the chunksize in bytes to load doclists
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** in. The second argument is the minimum doclist size in bytes to use
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** incremental loading with.
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**
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** Whether or not the arguments are present, this command returns a list of
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** two integers - the initial chunksize and threshold when the command is
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** invoked. This can be used to restore the default behavior after running
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** tests. For example:
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**
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** # Override incr-load settings for testing:
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** set cfg [fts3_configure_incr_load $new_chunksize $new_threshold]
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**
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** .... run tests ....
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**
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** # Restore initial incr-load settings:
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** eval fts3_configure_incr_load $cfg
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*/
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static int fts3_configure_incr_load_cmd(
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ClientData clientData,
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Tcl_Interp *interp,
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int objc,
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Tcl_Obj *CONST objv[]
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){
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#ifdef SQLITE_ENABLE_FTS3
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extern int test_fts3_node_chunksize;
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extern int test_fts3_node_chunk_threshold;
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Tcl_Obj *pRet;
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if( objc!=1 && objc!=3 ){
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Tcl_WrongNumArgs(interp, 1, objv, "?CHUNKSIZE THRESHOLD?");
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return TCL_ERROR;
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}
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pRet = Tcl_NewObj();
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Tcl_IncrRefCount(pRet);
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Tcl_ListObjAppendElement(
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interp, pRet, Tcl_NewIntObj(test_fts3_node_chunksize));
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Tcl_ListObjAppendElement(
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interp, pRet, Tcl_NewIntObj(test_fts3_node_chunk_threshold));
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if( objc==3 ){
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int iArg1;
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int iArg2;
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if( Tcl_GetIntFromObj(interp, objv[1], &iArg1)
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|| Tcl_GetIntFromObj(interp, objv[2], &iArg2)
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){
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Tcl_DecrRefCount(pRet);
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return TCL_ERROR;
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}
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test_fts3_node_chunksize = iArg1;
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test_fts3_node_chunk_threshold = iArg2;
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}
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Tcl_SetObjResult(interp, pRet);
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Tcl_DecrRefCount(pRet);
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#endif
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UNUSED_PARAMETER(clientData);
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return TCL_OK;
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}
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#ifdef SQLITE_ENABLE_FTS3
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/**************************************************************************
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** Beginning of test tokenizer code.
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**
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** For language 0, this tokenizer is similar to the default 'simple'
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** tokenizer. For other languages L, the following:
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**
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** * Odd numbered languages are case-sensitive. Even numbered
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** languages are not.
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**
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** * Language ids 100 or greater are considered an error.
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**
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** The implementation assumes that the input contains only ASCII characters
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** (i.e. those that may be encoded in UTF-8 using a single byte).
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*/
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typedef struct test_tokenizer {
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sqlite3_tokenizer base;
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} test_tokenizer;
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typedef struct test_tokenizer_cursor {
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sqlite3_tokenizer_cursor base;
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const char *aInput; /* Input being tokenized */
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int nInput; /* Size of the input in bytes */
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int iInput; /* Current offset in aInput */
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int iToken; /* Index of next token to be returned */
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char *aBuffer; /* Buffer containing current token */
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int nBuffer; /* Number of bytes allocated at pToken */
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int iLangid; /* Configured language id */
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} test_tokenizer_cursor;
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static int testTokenizerCreate(
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int argc, const char * const *argv,
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sqlite3_tokenizer **ppTokenizer
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){
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test_tokenizer *pNew;
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UNUSED_PARAMETER(argc);
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UNUSED_PARAMETER(argv);
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pNew = sqlite3_malloc(sizeof(test_tokenizer));
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if( !pNew ) return SQLITE_NOMEM;
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memset(pNew, 0, sizeof(test_tokenizer));
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*ppTokenizer = (sqlite3_tokenizer *)pNew;
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return SQLITE_OK;
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}
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static int testTokenizerDestroy(sqlite3_tokenizer *pTokenizer){
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test_tokenizer *p = (test_tokenizer *)pTokenizer;
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sqlite3_free(p);
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return SQLITE_OK;
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}
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static int testTokenizerOpen(
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sqlite3_tokenizer *pTokenizer, /* The tokenizer */
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const char *pInput, int nBytes, /* String to be tokenized */
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sqlite3_tokenizer_cursor **ppCursor /* OUT: Tokenization cursor */
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){
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int rc = SQLITE_OK; /* Return code */
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test_tokenizer_cursor *pCsr; /* New cursor object */
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UNUSED_PARAMETER(pTokenizer);
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pCsr = (test_tokenizer_cursor *)sqlite3_malloc(sizeof(test_tokenizer_cursor));
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if( pCsr==0 ){
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rc = SQLITE_NOMEM;
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}else{
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memset(pCsr, 0, sizeof(test_tokenizer_cursor));
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pCsr->aInput = pInput;
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if( nBytes<0 ){
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pCsr->nInput = (int)strlen(pInput);
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}else{
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pCsr->nInput = nBytes;
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}
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}
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*ppCursor = (sqlite3_tokenizer_cursor *)pCsr;
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return rc;
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}
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static int testTokenizerClose(sqlite3_tokenizer_cursor *pCursor){
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test_tokenizer_cursor *pCsr = (test_tokenizer_cursor *)pCursor;
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sqlite3_free(pCsr->aBuffer);
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sqlite3_free(pCsr);
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return SQLITE_OK;
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}
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static int testIsTokenChar(char c){
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return (c>='a' && c<='z') || (c>='A' && c<='Z');
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}
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static int testTolower(char c){
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char ret = c;
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if( ret>='A' && ret<='Z') ret = ret - ('A'-'a');
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return ret;
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}
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static int testTokenizerNext(
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sqlite3_tokenizer_cursor *pCursor, /* Cursor returned by testTokenizerOpen */
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const char **ppToken, /* OUT: *ppToken is the token text */
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int *pnBytes, /* OUT: Number of bytes in token */
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int *piStartOffset, /* OUT: Starting offset of token */
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int *piEndOffset, /* OUT: Ending offset of token */
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int *piPosition /* OUT: Position integer of token */
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){
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test_tokenizer_cursor *pCsr = (test_tokenizer_cursor *)pCursor;
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int rc = SQLITE_OK;
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const char *p;
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const char *pEnd;
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p = &pCsr->aInput[pCsr->iInput];
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pEnd = &pCsr->aInput[pCsr->nInput];
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/* Skip past any white-space */
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assert( p<=pEnd );
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while( p<pEnd && testIsTokenChar(*p)==0 ) p++;
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if( p==pEnd ){
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rc = SQLITE_DONE;
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}else{
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/* Advance to the end of the token */
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const char *pToken = p;
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int nToken;
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while( p<pEnd && testIsTokenChar(*p) ) p++;
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nToken = (int)(p-pToken);
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/* Copy the token into the buffer */
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if( nToken>pCsr->nBuffer ){
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sqlite3_free(pCsr->aBuffer);
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pCsr->aBuffer = sqlite3_malloc(nToken);
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}
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if( pCsr->aBuffer==0 ){
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rc = SQLITE_NOMEM;
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}else{
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int i;
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if( pCsr->iLangid & 0x00000001 ){
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for(i=0; i<nToken; i++) pCsr->aBuffer[i] = pToken[i];
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}else{
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for(i=0; i<nToken; i++) pCsr->aBuffer[i] = testTolower(pToken[i]);
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}
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pCsr->iToken++;
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pCsr->iInput = (int)(p - pCsr->aInput);
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*ppToken = pCsr->aBuffer;
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*pnBytes = nToken;
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*piStartOffset = (int)(pToken - pCsr->aInput);
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*piEndOffset = (int)(p - pCsr->aInput);
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*piPosition = pCsr->iToken;
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}
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}
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return rc;
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}
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static int testTokenizerLanguage(
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sqlite3_tokenizer_cursor *pCursor,
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int iLangid
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){
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int rc = SQLITE_OK;
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test_tokenizer_cursor *pCsr = (test_tokenizer_cursor *)pCursor;
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pCsr->iLangid = iLangid;
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if( pCsr->iLangid>=100 ){
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rc = SQLITE_ERROR;
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}
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return rc;
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}
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#endif
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static int fts3_test_tokenizer_cmd(
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ClientData clientData,
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Tcl_Interp *interp,
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int objc,
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|
Tcl_Obj *CONST objv[]
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){
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|
#ifdef SQLITE_ENABLE_FTS3
|
|
static const sqlite3_tokenizer_module testTokenizerModule = {
|
|
1,
|
|
testTokenizerCreate,
|
|
testTokenizerDestroy,
|
|
testTokenizerOpen,
|
|
testTokenizerClose,
|
|
testTokenizerNext,
|
|
testTokenizerLanguage
|
|
};
|
|
const sqlite3_tokenizer_module *pPtr = &testTokenizerModule;
|
|
if( objc!=1 ){
|
|
Tcl_WrongNumArgs(interp, 1, objv, "");
|
|
return TCL_ERROR;
|
|
}
|
|
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(
|
|
(const unsigned char *)&pPtr, sizeof(sqlite3_tokenizer_module *)
|
|
));
|
|
#endif
|
|
UNUSED_PARAMETER(clientData);
|
|
return TCL_OK;
|
|
}
|
|
|
|
static int fts3_test_varint_cmd(
|
|
ClientData clientData,
|
|
Tcl_Interp *interp,
|
|
int objc,
|
|
Tcl_Obj *CONST objv[]
|
|
){
|
|
#ifdef SQLITE_ENABLE_FTS3
|
|
char aBuf[24];
|
|
int rc;
|
|
Tcl_WideInt w, w2;
|
|
int nByte, nByte2;
|
|
|
|
if( objc!=2 ){
|
|
Tcl_WrongNumArgs(interp, 1, objv, "INTEGER");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
rc = Tcl_GetWideIntFromObj(interp, objv[1], &w);
|
|
if( rc!=TCL_OK ) return rc;
|
|
|
|
nByte = sqlite3Fts3PutVarint(aBuf, w);
|
|
nByte2 = sqlite3Fts3GetVarint(aBuf, &w2);
|
|
if( w!=w2 || nByte!=nByte2 ){
|
|
char *zErr = sqlite3_mprintf("error testing %lld", w);
|
|
Tcl_ResetResult(interp);
|
|
Tcl_AppendResult(interp, zErr, 0);
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if( w<=2147483647 && w>=0 ){
|
|
int i;
|
|
nByte2 = fts3GetVarint32(aBuf, &i);
|
|
if( (int)w!=i || nByte!=nByte2 ){
|
|
char *zErr = sqlite3_mprintf("error testing %lld (32-bit)", w);
|
|
Tcl_ResetResult(interp);
|
|
Tcl_AppendResult(interp, zErr, 0);
|
|
return TCL_ERROR;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
UNUSED_PARAMETER(clientData);
|
|
return TCL_OK;
|
|
}
|
|
|
|
/*
|
|
** End of tokenizer code.
|
|
**************************************************************************/
|
|
|
|
int Sqlitetestfts3_Init(Tcl_Interp *interp){
|
|
Tcl_CreateObjCommand(interp, "fts3_near_match", fts3_near_match_cmd, 0, 0);
|
|
Tcl_CreateObjCommand(interp,
|
|
"fts3_configure_incr_load", fts3_configure_incr_load_cmd, 0, 0
|
|
);
|
|
Tcl_CreateObjCommand(
|
|
interp, "fts3_test_tokenizer", fts3_test_tokenizer_cmd, 0, 0
|
|
);
|
|
|
|
Tcl_CreateObjCommand(
|
|
interp, "fts3_test_varint", fts3_test_varint_cmd, 0, 0
|
|
);
|
|
return TCL_OK;
|
|
}
|
|
#endif /* SQLITE_ENABLE_FTS3 || SQLITE_ENABLE_FTS4 */
|
|
#endif /* ifdef SQLITE_TEST */
|