/** BEGIN COPYRIGHT BLOCK
 * Copyright 2001 Sun Microsystems, Inc.
 * Portions copyright 1999, 2001-2003 Netscape Communications Corporation.
 * All rights reserved.
 * END COPYRIGHT BLOCK **/
#ifndef __lexer_h
#define __lexer_h

#ifndef _POOL_H_
#include "base/pool.h"
#endif /* _POOL_H_ */

/* Define error codes */
#define LEXERR_MALLOC	-1		/* insufficient dynamic memory */


typedef struct LEXStream_s LEXStream_t;
typedef int (*LEXStreamGet_t)(LEXStream_t *);
struct LEXStream_s {
    LEXStream_t * lst_next;		/* link for "include" parent stream */
    void * lst_strmid;			/* client stream identifier */
    LEXStreamGet_t lst_get;		/* pointer to stream "get" function */
    char * lst_buf;			/* stream buffer pointer */
    char * lst_cp;			/* current position in buffer */
    int lst_len;			/* remaining bytes in buffer */
    int lst_buflen;			/* buffer length */
    int lst_flags;			/* bit flags */
#define LST_FREEBUF	0x1		/* free lst_buf in stream destroy */
};
NSPR_BEGIN_EXTERN_C

/* Functions in lexer.c */
NSAPI_PUBLIC
int lex_class_check(void * chtab, char code, unsigned long cbits);

NSAPI_PUBLIC
int lex_class_create(int classc, char * classv[], void **pchtab);

NSAPI_PUBLIC void lex_class_destroy(void * chtab);

NSAPI_PUBLIC
LEXStream_t * lex_stream_create(LEXStreamGet_t strmget, void * strmid,
                                char * buf, int buflen);

NSAPI_PUBLIC void lex_stream_destroy(LEXStream_t * lst);

NSAPI_PUBLIC int
lex_token_new(pool_handle_t * pool, int initlen, int growlen, void **token);

NSAPI_PUBLIC int lex_token_start(void * token);

NSAPI_PUBLIC
char * lex_token_info(void * token, int * tdatalen, int * tbufflen);

NSAPI_PUBLIC char * lex_token(void * token);

NSAPI_PUBLIC void lex_token_destroy(void * token);

NSAPI_PUBLIC
char * lex_token_get(void * token, int * tdatalen, int * tbufflen);

NSAPI_PUBLIC char * lex_token_take(void * token);

NSAPI_PUBLIC
int lex_token_append(void * token, int nbytes, char * src);

NSAPI_PUBLIC
int lex_next_char(LEXStream_t * lst, void * chtab, unsigned long cbits);

NSAPI_PUBLIC
int lex_scan_over(LEXStream_t * lst, void * chtab, unsigned long cbits,
			 void * token);

NSAPI_PUBLIC
int lex_scan_string(LEXStream_t * lst, void * token, int flags);

NSAPI_PUBLIC
int lex_scan_to(LEXStream_t * lst, void * chtab, unsigned long cbits,
                void * token);

NSAPI_PUBLIC
int lex_skip_over(LEXStream_t * lst, void * chtab, unsigned long cbits);

NSAPI_PUBLIC
int lex_skip_to(LEXStream_t * lst, void * chtab, unsigned long cbits);

NSPR_END_EXTERN_C

#endif /* __lexer_h */