/* Copyright 2005-2006 Garrett Rooney.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef DDL_LEXER_H
#define DDL_LEXER_H

#include "etl_stream.h"

#include "parser.h"

/* A lexer for the ETL Data Definition Language. */
typedef struct etl_ddl_lexer_t etl_ddl_lexer_t;

#define ETL_DDL_TOK_EOI 47 /* sufficiently big... */

typedef struct {
  int type;
  char *data;
  int line;
} etl_token_t;

/* Return a lexer that will scan the contents of BB, allocated in POOL. */
etl_ddl_lexer_t *etl_ddl_lexer_create(etl_stream_t *stream);

void etl_ddl_lexer_destroy(etl_ddl_lexer_t *l);

/* Scan forward to find the next token in LEXER, returning it in *TOK, using
 * POOL for temporary allocations. */
etl_error_t *
etl_ddl_lexer_scan(etl_token_t **tok, etl_ddl_lexer_t *lexer);

void etl_ddl_token_destroy(etl_token_t *tok);

#endif /* DDL_LEXER_H */