/*
 * Mimas conversion tools
 *
 * Copyright (C) 2010 Benjamin Moody
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

typedef struct _parse_node {
  unsigned int type;
  char *strval;
  long int longval;
  symbol *symval;
  struct _parse_node *left;
  struct _parse_node *right;
} parse_node;

/* Parsing flags */
enum {
  PARSE_INCLUDE_EMPTY_LINES    = 0x0001,
  PARSE_INCLUDE_EMPTY_COMMENTS = 0x0002,
  PARSE_REFLOW_COMMENTS        = 0x0004,
  PARSE_ZMASM_LABELS           = 0x0008,
  PARSE_OCTAL_AT               = 0x0010,
  PARSE_NO_PRECEDENCE          = 0x0020,
  PARSE_ROMCALLS_NO_UNDERSCORE = 0x0040,
  PARSE_ORG_IS_RORG            = 0x0080
};

/* Pseudo-expression/token types */
enum {
  XX_EOL = 1024,
  XX_LPAREN,
  XX_RPAREN,
  XX_LBRACK,
  XX_RBRACK,
  XX_COMMA,
  XX_LOGAND,
  XX_LOGOR,
  XX_STRING
};

int is_whitespace(int c);
int is_wc(int c);

parse_node *new_parse_node(unsigned int type);
parse_node *new_parse_node_long(unsigned int type, long int longval);
parse_node *parse_expr_list(const char **in, symbol_tab *stab,
			    unsigned int flags);
parse_node *parse_label(const char *name, symbol_tab *stab,
			unsigned int flags);
void free_parse_tree(parse_node *n);
parse_node *dup_parse_tree(const parse_node *n);