/* Copyright 2015 Samsung Electronics Co., Ltd.
 * Copyright 2015 University of Szeged.
 *
 * 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 RE_PARSER_H
#define RE_PARSER_H

#ifndef CONFIG_ECMA_COMPACT_PROFILE_DISABLE_REGEXP_BUILTIN

#include "opcodes-dumper.h"

/**
 * RegExp token type definitions
 */
typedef enum
{
  RE_TOK_EOF, /* EOF */
  RE_TOK_BACKREFERENCE, /* \[0..9] */
  RE_TOK_CHAR, /* any character */
  RE_TOK_ALTERNATIVE, /* | */
  RE_TOK_ASSERT_START, /* ^ */
  RE_TOK_ASSERT_END, /* $ */
  RE_TOK_PERIOD, /* . */
  RE_TOK_START_CAPTURE_GROUP, /* ( */
  RE_TOK_START_NON_CAPTURE_GROUP, /* (?: */
  RE_TOK_END_GROUP, /* ')' */
  RE_TOK_ASSERT_START_POS_LOOKAHEAD, /* (?= */
  RE_TOK_ASSERT_START_NEG_LOOKAHEAD, /* (?! */
  RE_TOK_ASSERT_WORD_BOUNDARY, /* \b */
  RE_TOK_ASSERT_NOT_WORD_BOUNDARY, /* \B */
  RE_TOK_DIGIT, /* \d */
  RE_TOK_NOT_DIGIT, /* \D */
  RE_TOK_WHITE, /* \s */
  RE_TOK_NOT_WHITE, /* \S */
  RE_TOK_WORD_CHAR, /* \w */
  RE_TOK_NOT_WORD_CHAR, /* \W */
  RE_TOK_START_CHAR_CLASS, /* [ ] */
  RE_TOK_START_INV_CHAR_CLASS, /* [^ ] */
} re_token_type_t;
/**
  * RegExp constant of infinite
  */
#define RE_ITERATOR_INFINITE ((uint32_t)-1)

/**
  * Maximum number of decimal escape digits
  */
#define RE_MAX_RE_DECESC_DIGITS 9

/* FIXME: depends on unicode support */
#define RE_CHAR_UNDEF ((ecma_char_t)-1)

#define RE_CONTROL_CHAR_NUL  0x0000 /* \0 */
#define RE_CONTROL_CHAR_BEL  0x0008 /* \b */
#define RE_CONTROL_CHAR_TAB  0x0009 /* \t */
#define RE_CONTROL_CHAR_EOL  0x000a /* \n */
#define RE_CONTROL_CHAR_VT   0x000b /* \v */
#define RE_CONTROL_CHAR_FF   0x000c /* \f */
#define RE_CONTROL_CHAR_CR   0x000d /* \r */

/**
 * RegExp token type
 */
typedef struct
{
  re_token_type_t type; /**< type of the token */
  uint32_t value; /**< value of the token */
  uint32_t qmin; /**< minimum number of token iterations */
  uint32_t qmax; /**< maximum number of token iterations */
  bool greedy; /**< type of iteration */
} re_token_t;

/**
  * RegExp parser context
  */
typedef struct
{
  lit_utf8_byte_t *pattern_start_p; /**< start of input pattern string */
  lit_utf8_byte_t *current_char_p; /**< current character in input pattern */
  int num_of_groups; /**< number of groups */
  uint32_t num_of_classes; /**< number of character classes */
} re_parser_ctx_t;

typedef void (*re_char_class_callback) (void *re_ctx_p, uint32_t start, uint32_t end);

ecma_completion_value_t
re_parse_char_class (re_parser_ctx_t *parser_ctx_p,
                     re_char_class_callback append_char_class,
                     void *re_ctx_p, re_token_t *out_token_p);

ecma_completion_value_t
re_parse_next_token (re_parser_ctx_t *parser_ctx_p, re_token_t *out_token_p);

#endif /* CONFIG_ECMA_COMPACT_PROFILE_DISABLE_REGEXP_BUILTIN */
#endif /* RE_PARSER_H */