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#ifndef NEWSBOAT_FILTER_PARSER_H_
#define NEWSBOAT_FILTER_PARSER_H_
#include <string>
#include <sys/types.h>
#include <regex.h>
enum { LOGOP_INVALID = 0, LOGOP_AND = 1, LOGOP_OR, MATCHOP_EQ, MATCHOP_NE, MATCHOP_RXEQ, MATCHOP_RXNE, MATCHOP_LT, MATCHOP_GT, MATCHOP_LE, MATCHOP_GE, MATCHOP_CONTAINS, MATCHOP_CONTAINSNOT, MATCHOP_BETWEEN };
struct expression {
expression(const std::string& n, const std::string& lit, int o);
expression(int o = LOGOP_INVALID);
~expression();
std::string name;
std::string literal;
int op;
expression * l, * r;
expression * parent;
regex_t * regex;
};
class FilterParser {
public:
FilterParser();
FilterParser(const FilterParser& p);
~FilterParser();
void add_logop(int op);
void add_matchexpr(char * name, int op, char * lit);
void open_block();
void close_block();
bool parse_string(const std::string& str);
void cleanup();
inline expression * get_root() { return root; }
FilterParser& operator=(FilterParser& p);
const std::wstring& get_error() { return errmsg; }
private:
void print_tree_r(expression * e, unsigned int depth);
void cleanup_r(expression * e);
expression * root;
expression * curpos;
bool next_must_descend_right;
std::string strexpr;
std::wstring errmsg;
};
#endif /* NEWSBOAT_FILTER_PARSER_H_ */
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