/*
** Call sqlite3_declare_vtab() based on the contents of the configuration
** object passed as the only argument. Return SQLITE_OK if successful, or
** an SQLite error code if an error occurs.
*/
int sqlite3Fts5ConfigDeclareVtab(Fts5Config *pConfig){
int i;
int rc = SQLITE_OK;
char *zSql;
zSql = sqlite3Fts5Mprintf(&rc, "CREATE TABLE x(");
for(i=0; zSql && i<pConfig->nCol; i++){
const char *zSep = (i==0?"":", ");
zSql = sqlite3Fts5Mprintf(&rc, "%z%s%Q", zSql, zSep, pConfig->azCol[i]);
}
zSql = sqlite3Fts5Mprintf(&rc, "%z, %Q HIDDEN, %s HIDDEN)",
zSql, pConfig->zName, FTS5_RANK_NAME
);
assert( zSql || rc==SQLITE_NOMEM );
if( zSql ){
rc = sqlite3_declare_vtab(pConfig->db, zSql);
sqlite3_free(zSql);
}
return rc;
}
/*
** Load the contents of the %_config table into memory.
*/
int sqlite3Fts5ConfigLoad(Fts5Config *pConfig, int iCookie){
const char *zSelect = "SELECT k, v FROM %Q.'%q_config'";
char *zSql;
sqlite3_stmt *p = 0;
int rc = SQLITE_OK;
int iVersion = 0;
/* Set default values */
pConfig->pgsz = FTS5_DEFAULT_PAGE_SIZE;
pConfig->nAutomerge = FTS5_DEFAULT_AUTOMERGE;
pConfig->nUsermerge = FTS5_DEFAULT_USERMERGE;
pConfig->nCrisisMerge = FTS5_DEFAULT_CRISISMERGE;
pConfig->nHashSize = FTS5_DEFAULT_HASHSIZE;
zSql = sqlite3Fts5Mprintf(&rc, zSelect, pConfig->zDb, pConfig->zName);
if( zSql ){
rc = sqlite3_prepare_v2(pConfig->db, zSql, -1, &p, 0);
sqlite3_free(zSql);
}
assert( rc==SQLITE_OK || p==0 );
if( rc==SQLITE_OK ){
while( SQLITE_ROW==sqlite3_step(p) ){
const char *zK = (const char*)sqlite3_column_text(p, 0);
sqlite3_value *pVal = sqlite3_column_value(p, 1);
if( 0==sqlite3_stricmp(zK, "version") ){
iVersion = sqlite3_value_int(pVal);
}else{
int bDummy = 0;
sqlite3Fts5ConfigSetValue(pConfig, zK, pVal, &bDummy);
}
}
rc = sqlite3_finalize(p);
}
if( rc==SQLITE_OK && iVersion!=FTS5_CURRENT_VERSION ){
rc = SQLITE_ERROR;
if( pConfig->pzErrmsg ){
assert( 0==*pConfig->pzErrmsg );
*pConfig->pzErrmsg = sqlite3_mprintf(
"invalid fts5 file format (found %d, expected %d) - run 'rebuild'",
iVersion, FTS5_CURRENT_VERSION
);
}
}
if( rc==SQLITE_OK ){
pConfig->iCookie = iCookie;
}
return rc;
}
/*
** Arguments nArg/azArg contain the string arguments passed to the xCreate
** or xConnect method of the virtual table. This function attempts to
** allocate an instance of Fts5Config containing the results of parsing
** those arguments.
**
** If successful, SQLITE_OK is returned and *ppOut is set to point to the
** new Fts5Config object. If an error occurs, an SQLite error code is
** returned, *ppOut is set to NULL and an error message may be left in
** *pzErr. It is the responsibility of the caller to eventually free any
** such error message using sqlite3_free().
*/
int sqlite3Fts5ConfigParse(
Fts5Global *pGlobal,
sqlite3 *db,
int nArg, /* Number of arguments */
const char **azArg, /* Array of nArg CREATE VIRTUAL TABLE args */
Fts5Config **ppOut, /* OUT: Results of parse */
char **pzErr /* OUT: Error message */
){
int rc = SQLITE_OK; /* Return code */
Fts5Config *pRet; /* New object to return */
int i;
int nByte;
*ppOut = pRet = (Fts5Config*)sqlite3_malloc(sizeof(Fts5Config));
if( pRet==0 ) return SQLITE_NOMEM;
memset(pRet, 0, sizeof(Fts5Config));
pRet->db = db;
pRet->iCookie = -1;
nByte = nArg * (sizeof(char*) + sizeof(u8));
pRet->azCol = (char**)sqlite3Fts5MallocZero(&rc, nByte);
pRet->abUnindexed = (u8*)&pRet->azCol[nArg];
pRet->zDb = sqlite3Fts5Strndup(&rc, azArg[1], -1);
pRet->zName = sqlite3Fts5Strndup(&rc, azArg[2], -1);
pRet->bColumnsize = 1;
pRet->eDetail = FTS5_DETAIL_FULL;
#ifdef SQLITE_DEBUG
pRet->bPrefixIndex = 1;
#endif
if( rc==SQLITE_OK && sqlite3_stricmp(pRet->zName, FTS5_RANK_NAME)==0 ){
*pzErr = sqlite3_mprintf("reserved fts5 table name: %s", pRet->zName);
rc = SQLITE_ERROR;
}
for(i=3; rc==SQLITE_OK && i<nArg; i++){
const char *zOrig = azArg[i];
const char *z;
char *zOne = 0;
char *zTwo = 0;
int bOption = 0;
int bMustBeCol = 0;
z = fts5ConfigGobbleWord(&rc, zOrig, &zOne, &bMustBeCol);
z = fts5ConfigSkipWhitespace(z);
if( z && *z=='=' ){
bOption = 1;
z++;
if( bMustBeCol ) z = 0;
}
z = fts5ConfigSkipWhitespace(z);
if( z && z[0] ){
int bDummy;
z = fts5ConfigGobbleWord(&rc, z, &zTwo, &bDummy);
if( z && z[0] ) z = 0;
}
if( rc==SQLITE_OK ){
if( z==0 ){
*pzErr = sqlite3_mprintf("parse error in \"%s\"", zOrig);
rc = SQLITE_ERROR;
}else{
if( bOption ){
rc = fts5ConfigParseSpecial(pGlobal, pRet, zOne, zTwo?zTwo:"", pzErr);
}else{
rc = fts5ConfigParseColumn(pRet, zOne, zTwo, pzErr);
zOne = 0;
}
}
}
sqlite3_free(zOne);
sqlite3_free(zTwo);
}
/* If a tokenizer= option was successfully parsed, the tokenizer has
** already been allocated. Otherwise, allocate an instance of the default
** tokenizer (unicode61) now. */
if( rc==SQLITE_OK && pRet->pTok==0 ){
rc = fts5ConfigDefaultTokenizer(pGlobal, pRet);
}
/* If no zContent option was specified, fill in the default values. */
if( rc==SQLITE_OK && pRet->zContent==0 ){
const char *zTail = 0;
assert( pRet->eContent==FTS5_CONTENT_NORMAL
|| pRet->eContent==FTS5_CONTENT_NONE
);
if( pRet->eContent==FTS5_CONTENT_NORMAL ){
zTail = "content";
}else if( pRet->bColumnsize ){
zTail = "docsize";
}
if( zTail ){
pRet->zContent = sqlite3Fts5Mprintf(
&rc, "%Q.'%q_%s'", pRet->zDb, pRet->zName, zTail
);
}
}
if( rc==SQLITE_OK && pRet->zContentRowid==0 ){
pRet->zContentRowid = sqlite3Fts5Strndup(&rc, "rowid", -1);
}
/* Formulate the zContentExprlist text */
if( rc==SQLITE_OK ){
rc = fts5ConfigMakeExprlist(pRet);
}
if( rc!=SQLITE_OK ){
sqlite3Fts5ConfigFree(pRet);
*ppOut = 0;
}
return rc;
}
/*
** Parse a "special" CREATE VIRTUAL TABLE directive and update
** configuration object pConfig as appropriate.
**
** If successful, object pConfig is updated and SQLITE_OK returned. If
** an error occurs, an SQLite error code is returned and an error message
** may be left in *pzErr. It is the responsibility of the caller to
** eventually free any such error message using sqlite3_free().
*/
static int fts5ConfigParseSpecial(
Fts5Global *pGlobal,
Fts5Config *pConfig, /* Configuration object to update */
const char *zCmd, /* Special command to parse */
const char *zArg, /* Argument to parse */
char **pzErr /* OUT: Error message */
){
int rc = SQLITE_OK;
int nCmd = (int)strlen(zCmd);
if( sqlite3_strnicmp("prefix", zCmd, nCmd)==0 ){
const int nByte = sizeof(int) * FTS5_MAX_PREFIX_INDEXES;
const char *p;
int bFirst = 1;
if( pConfig->aPrefix==0 ){
pConfig->aPrefix = sqlite3Fts5MallocZero(&rc, nByte);
if( rc ) return rc;
}
p = zArg;
while( 1 ){
int nPre = 0;
while( p[0]==' ' ) p++;
if( bFirst==0 && p[0]==',' ){
p++;
while( p[0]==' ' ) p++;
}else if( p[0]=='\0' ){
break;
}
if( p[0]<'0' || p[0]>'9' ){
*pzErr = sqlite3_mprintf("malformed prefix=... directive");
rc = SQLITE_ERROR;
break;
}
if( pConfig->nPrefix==FTS5_MAX_PREFIX_INDEXES ){
*pzErr = sqlite3_mprintf(
"too many prefix indexes (max %d)", FTS5_MAX_PREFIX_INDEXES
);
rc = SQLITE_ERROR;
break;
}
while( p[0]>='0' && p[0]<='9' && nPre<1000 ){
nPre = nPre*10 + (p[0] - '0');
p++;
}
if( rc==SQLITE_OK && (nPre<=0 || nPre>=1000) ){
*pzErr = sqlite3_mprintf("prefix length out of range (max 999)");
rc = SQLITE_ERROR;
break;
}
pConfig->aPrefix[pConfig->nPrefix] = nPre;
pConfig->nPrefix++;
bFirst = 0;
}
assert( pConfig->nPrefix<=FTS5_MAX_PREFIX_INDEXES );
return rc;
}
if( sqlite3_strnicmp("tokenize", zCmd, nCmd)==0 ){
const char *p = (const char*)zArg;
int nArg = (int)strlen(zArg) + 1;
char **azArg = sqlite3Fts5MallocZero(&rc, sizeof(char*) * nArg);
char *pDel = sqlite3Fts5MallocZero(&rc, nArg * 2);
char *pSpace = pDel;
if( azArg && pSpace ){
if( pConfig->pTok ){
*pzErr = sqlite3_mprintf("multiple tokenize=... directives");
rc = SQLITE_ERROR;
}else{
for(nArg=0; p && *p; nArg++){
const char *p2 = fts5ConfigSkipWhitespace(p);
if( *p2=='\'' ){
p = fts5ConfigSkipLiteral(p2);
}else{
p = fts5ConfigSkipBareword(p2);
}
if( p ){
memcpy(pSpace, p2, p-p2);
azArg[nArg] = pSpace;
sqlite3Fts5Dequote(pSpace);
pSpace += (p - p2) + 1;
p = fts5ConfigSkipWhitespace(p);
}
}
if( p==0 ){
*pzErr = sqlite3_mprintf("parse error in tokenize directive");
rc = SQLITE_ERROR;
}else{
rc = sqlite3Fts5GetTokenizer(pGlobal,
(const char**)azArg, nArg, &pConfig->pTok, &pConfig->pTokApi,
pzErr
);
}
}
}
sqlite3_free(azArg);
sqlite3_free(pDel);
return rc;
}
if( sqlite3_strnicmp("content", zCmd, nCmd)==0 ){
if( pConfig->eContent!=FTS5_CONTENT_NORMAL ){
*pzErr = sqlite3_mprintf("multiple content=... directives");
rc = SQLITE_ERROR;
}else{
if( zArg[0] ){
pConfig->eContent = FTS5_CONTENT_EXTERNAL;
pConfig->zContent = sqlite3Fts5Mprintf(&rc, "%Q.%Q", pConfig->zDb,zArg);
}else{
pConfig->eContent = FTS5_CONTENT_NONE;
}
}
return rc;
}
if( sqlite3_strnicmp("content_rowid", zCmd, nCmd)==0 ){
if( pConfig->zContentRowid ){
*pzErr = sqlite3_mprintf("multiple content_rowid=... directives");
rc = SQLITE_ERROR;
}else{
pConfig->zContentRowid = sqlite3Fts5Strndup(&rc, zArg, -1);
}
return rc;
}
if( sqlite3_strnicmp("columnsize", zCmd, nCmd)==0 ){
if( (zArg[0]!='0' && zArg[0]!='1') || zArg[1]!='\0' ){
*pzErr = sqlite3_mprintf("malformed columnsize=... directive");
rc = SQLITE_ERROR;
}else{
pConfig->bColumnsize = (zArg[0]=='1');
}
return rc;
}
if( sqlite3_strnicmp("detail", zCmd, nCmd)==0 ){
const Fts5Enum aDetail[] = {
{ "none", FTS5_DETAIL_NONE },
{ "full", FTS5_DETAIL_FULL },
{ "columns", FTS5_DETAIL_COLUMNS },
{ 0, 0 }
};
if( (rc = fts5ConfigSetEnum(aDetail, zArg, &pConfig->eDetail)) ){
*pzErr = sqlite3_mprintf("malformed detail=... directive");
}
return rc;
}
*pzErr = sqlite3_mprintf("unrecognized option: \"%.*s\"", nCmd, zCmd);
return SQLITE_ERROR;
}