/* ** Parameter zIn contains a rank() function specification. The format of ** this is: ** ** + Bareword (function name) ** + Open parenthesis - "(" ** + Zero or more SQL literals in a comma separated list ** + Close parenthesis - ")" */ int sqlite3Fts5ConfigParseRank( const char *zIn, /* Input string */ char **pzRank, /* OUT: Rank function name */ char **pzRankArgs /* OUT: Rank function arguments */ ){ const char *p = zIn; const char *pRank; char *zRank = 0; char *zRankArgs = 0; int rc = SQLITE_OK; *pzRank = 0; *pzRankArgs = 0; if( p==0 ){ rc = SQLITE_ERROR; }else{ p = fts5ConfigSkipWhitespace(p); pRank = p; p = fts5ConfigSkipBareword(p); if( p ){ zRank = sqlite3Fts5MallocZero(&rc, 1 + p - pRank); if( zRank ) memcpy(zRank, pRank, p-pRank); }else{ rc = SQLITE_ERROR; } if( rc==SQLITE_OK ){ p = fts5ConfigSkipWhitespace(p); if( *p!='(' ) rc = SQLITE_ERROR; p++; } if( rc==SQLITE_OK ){ const char *pArgs; p = fts5ConfigSkipWhitespace(p); pArgs = p; if( *p!=')' ){ p = fts5ConfigSkipArgs(p); if( p==0 ){ rc = SQLITE_ERROR; }else{ zRankArgs = sqlite3Fts5MallocZero(&rc, 1 + p - pArgs); if( zRankArgs ) memcpy(zRankArgs, pArgs, p-pArgs); } } } } if( rc!=SQLITE_OK ){ sqlite3_free(zRank); assert( zRankArgs==0 ); }else{ *pzRank = zRank; *pzRankArgs = zRankArgs; } return rc; }
/* ** Gobble up the first bareword or quoted word from the input buffer zIn. ** Return a pointer to the character immediately following the last in ** the gobbled word if successful, or a NULL pointer otherwise (failed ** to find close-quote character). ** ** Before returning, set pzOut to point to a new buffer containing a ** nul-terminated, dequoted copy of the gobbled word. If the word was ** quoted, *pbQuoted is also set to 1 before returning. ** ** If *pRc is other than SQLITE_OK when this function is called, it is ** a no-op (NULL is returned). Otherwise, if an OOM occurs within this ** function, *pRc is set to SQLITE_NOMEM before returning. *pRc is *not* ** set if a parse error (failed to find close quote) occurs. */ static const char *fts5ConfigGobbleWord( int *pRc, /* IN/OUT: Error code */ const char *zIn, /* Buffer to gobble string/bareword from */ char **pzOut, /* OUT: malloc'd buffer containing str/bw */ int *pbQuoted /* OUT: Set to true if dequoting required */ ){ const char *zRet = 0; int nIn = (int)strlen(zIn); char *zOut = sqlite3_malloc(nIn+1); assert( *pRc==SQLITE_OK ); *pbQuoted = 0; *pzOut = 0; if( zOut==0 ){ *pRc = SQLITE_NOMEM; }else{ memcpy(zOut, zIn, nIn+1); if( fts5_isopenquote(zOut[0]) ){ int ii = fts5Dequote(zOut); zRet = &zIn[ii]; *pbQuoted = 1; }else{ zRet = fts5ConfigSkipBareword(zIn); if( zRet ){ zOut[zRet-zIn] = '\0'; } } } if( zRet==0 ){ sqlite3_free(zOut); }else{ *pzOut = zOut; } return zRet; }
/* ** 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; }