SQLite

  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);

#-------------------------------------------------------------------------
# Syntax errors in the prefix= option.
#
foreach {tn opt} {
  1 {prefix=x}  
  2 {prefix='x'}
  3 {prefix='$'}
  4 {prefix='1,2,'}
  5 {prefix=',1'}
} {
  set res [list 1 {malformed prefix=... directive}]
  do_catchsql_test 2.$tn "CREATE VIRTUAL TABLE f1 USING fts5(x, $opt)" $res
}

#-------------------------------------------------------------------------
# Syntax errors in the 'rank' option.

do_catchsql_test 5.3 {
  CREATE VIRTUAL TABLE yy USING fts5(x, [y]]);
} {1 {unrecognized token: "]"}}

#-------------------------------------------------------------------------
# Errors in prefix= directives.
#



do_catchsql_test 6.2 {
  CREATE VIRTUAL TABLE abc USING fts5(a, prefix='1, 2, 1001');
} {1 {prefix length out of range (max 999)}}
do_catchsql_test 6.3 {
  CREATE VIRTUAL TAbLE abc USING fts5(a, prefix='1, 2, 0000');
} {1 {prefix length out of range (max 999)}}
do_catchsql_test 6.4 {
  CREATE VIRTUAL TABLE abc USING fts5(a, prefix='1  , 1000000');
} {1 {prefix length out of range (max 999)}}

#-------------------------------------------------------------------------
# Duplicate tokenize= and other options.
#
do_catchsql_test 7.1 {
  CREATE VIRTUAL TABLE abc USING fts5(a, tokenize=porter, tokenize=ascii);
} {1 {multiple tokenize=... directives}}

do_execsql_test 9.3.4 {
  INSERT INTO abc(abc, rank) VALUES('crisismerge', 50000000);
} {}

do_catchsql_test 9.4.1 {
  INSERT INTO abc(abc, rank) VALUES('nosuchoption', 1);
} {1 {SQL logic error or missing database}}

#-------------------------------------------------------------------------
# Too many prefix indexes. Maximum allowed is 31.
#
foreach {tn spec} {
  1 {prefix="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32"}
  2 {prefix="1 2 3 4", prefix="5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32"}
} {
  set sql "CREATE VIRTUAL TABLE xyz USING fts5(x, $spec)"
  do_catchsql_test 10.$tn $sql {1 {too many prefix indexes (max 31)}}
}

finish_test

  5 x {xb*}
  6 x {xc*}
} {
  set res [db eval "SELECT rowid FROM t5 WHERE gmatch($col, \$pattern)"]
  set query "$col : $pattern"
  do_execsql_test 6.$tn { SELECT rowid FROM t5($query) } $res
}

#-------------------------------------------------------------------------
# Check that the various ways of creating prefix indexes produce the
# same database on disk.
#
save_prng_state
foreach {tn create} {
  1 { CREATE VIRTUAL TABLE tt USING fts5(x, y, prefix="1,2,3") }
  2 { CREATE VIRTUAL TABLE tt USING fts5(x, y, prefix="1 2 3") }
  3 { CREATE VIRTUAL TABLE tt USING fts5(x, y, prefix=1, prefix=2, prefix=3) }
  4 { CREATE VIRTUAL TABLE tt USING fts5(x, y, prefix="1 2", prefix=3) }
} {
  execsql { DROP TABLE IF EXISTS tt }
  restore_prng_state
  execsql $create
  execsql {
    INSERT INTO tt VALUES('cc b ggg ccc aa eee hh', 'aa g b hh a e');
    INSERT INTO tt VALUES('cc bb cc gg j g cc', 'ii jjj ggg jjj cc cc');
    INSERT INTO tt VALUES('h eee cc h iii', 'aaa iii dd iii dd');
    INSERT INTO tt VALUES('jjj hh eee c e b gg', 'j bbb jj ddd jj');
    INSERT INTO tt VALUES('ii hhh aaa ff c hhh iii', 'j cc hh bb e');
    INSERT INTO tt VALUES('e fff hhh i aaa', 'g b aa gg c aa dd');
    INSERT INTO tt VALUES('i aaa ccc gg hhh aa h', 'j bbb bbb d ff');
    INSERT INTO tt VALUES('g f gg ff ff jjj d', 'jjj d j fff fff ee j');
    INSERT INTO tt VALUES('a cc e ccc jjj c', 'ccc iii d bb a eee g');
    INSERT INTO tt VALUES('jj hh hh bb bbb gg', 'j c jjj bb iii f');
    INSERT INTO tt VALUES('a ggg g cc ccc aa', 'jjj j j aaa c');
    INSERT INTO tt VALUES('ddd j dd b i', 'aaa bbb iii ggg ff ccc ddd');
    INSERT INTO tt VALUES('jj ii hh c ii h gg', 'hhh bbb ddd bbb hh g ggg');
    INSERT INTO tt VALUES('aa hhh ccc h ggg ccc', 'iii d jj a ff ii');
  }

  #db eval {SELECT rowid, fts5_decode(rowid, block) aS r FROM tt_data} {puts $r}

  if {$tn==1} {
    set ::checksum [execsql {SELECT md5sum(id, block) FROM tt_data}]
  } else {
    do_execsql_test 7.$tn {
      SELECT md5sum(id, block) FROM tt_data
    } [list $::checksum]
  }
}

finish_test