#ifndef PREPROCESSOR_H
#define PREPROCESSOR_H

#include "lexer.h"


typedef enum comment_type comment_type;
typedef enum directive_type directive_type;
typedef struct stmt stmt;
typedef struct linked_list linked_list;
typedef struct keyword keyword;
typedef struct cursor cursor;
typedef struct whitespace whitespace;
typedef struct comment comment;
typedef struct source source;
typedef void *(keyword_cb)(void *ctx, int dbg);

enum directive_type {
	DIR_NONE,
	DIR_INCLUDE,
	NUM_DIRS
};

enum comment_type {
	COMM_NONE,
	COMM_MULTI,
	COMM_SINGLE,
	NUM_COMMS
};

struct linked_list {
	void *data;
	linked_list *next;
};

struct keyword {
	char *name;
	int id;
	keyword_cb *found_keyword;
};

struct cursor {
	int line;
	int column;
};

struct whitespace {
	int spaces;
	int bspaces;
	int tabs;
	int vtabs;
	int lines;
};

struct comment {
	enum comment_type type;
	char *text;
	cursor start_pos;
	cursor end_pos;
	whitespace wsp;
};

struct source {
	source *parent;
	source **include_list;
	comment **comments;
	char *filename;
	char *text;
	int included : 1;
	int tab_width;
	cursor cur;
	stmt *root;
	stmt *last;
};

/*extern keyword *find_keyword(const char *key, keyword **keywords, int dbg);*/
extern char *skip_whitespace(source *src, whitespace *wspace, int count_lines, int count_columns, int dbg);
extern char *skip_comment(source *src, whitespace *wspace, comment_type *type, int dbg);
extern int find_keyword(const char *key, keyword **keywords, void *ctx, void **callback_ret, int dbg);
extern source *preprocess(source *parent, const char *filename, int dbg);
#endif