/* Copyright (C) 2003, 2004 Dave Bayer. Subject to the terms and conditions of the MIT License. */

/*. NCHARS */
#define NCHARS 256

/*. filterRules */
typedef struct filterRules
{
	char *fromStr, *toStr;
	unsigned fromState, toState, mark;
	unsigned fromLen, toLen;
	struct filterRules *next;
} filterRules;

/*. filterMark */
typedef struct filterMark
{
	unsigned mark, index;
	struct filterMark *next;
} filterMark;

/*. filterTable */
typedef filterRules *filterTable[NCHARS];

/*. filterState */
typedef struct filterState
{
	filterTable *table;
	unsigned state;
	unsigned  (*filt)( char **ps, char **pt, unsigned state );
} filterState;

/* function prototypes */
void markFree( void *data );
void initFilterTable( filterTable *table, filterRules *rules, unsigned nstates, BOOL clear );
void stateFilter( line *buf1, line *buf2, void *data );

#ifdef TESTCODE
void filterTest( void );
#endif