#ifndef DETAG2_H
#define DETAG2_H

typedef enum {
  detag2_input_string_token = 1, detag2_html_token, detag2_eof_token,
  detag2_text_token, detag2_tag_token, detag2_tag_innards_token = 11,
  detag2_other_stuff_token = 16, detag2_header_type_token = 26,
  detag2_comment_stuff_token = 57, detag2_tag_innard_char_token,
  detag2_comment_char_token = 61, detag2_text_char_token = 64,
  detag2_ordinary_text_char_token, detag2_entity_text_char_token
} detag2_token_type;

typedef struct detag2_pcb_struct{
  detag2_token_type token_number, reduction_token, error_frame_token;
  int input_code;
  int input_value;
  int line, column;
  int ssx, sn, error_frame_ssx;
  int drt, dssx, dsn;
  int ss[128];
  int vs[128];
  int ag_ap;
  const char *error_message;
  char read_flag;
  char exit_flag;
  int bts[128], btsx;
  unsigned char * pointer;
  unsigned char * la_ptr;
  const unsigned char *key_sp;
  int save_index, key_state;
  char ag_msg[82];
} detag2_pcb_type;

#ifndef PRULE_CONTEXT
#define PRULE_CONTEXT(pcb)  (&((pcb).cs[(pcb).ssx]))
#define PERROR_CONTEXT(pcb) ((pcb).cs[(pcb).error_frame_ssx])
#define PCONTEXT(pcb)       ((pcb).cs[(pcb).ssx])
#endif

#ifndef AG_RUNNING_CODE
/* PCB.exit_flag values */
#define AG_RUNNING_CODE         0
#define AG_SUCCESS_CODE         1
#define AG_SYNTAX_ERROR_CODE    2
#define AG_REDUCTION_ERROR_CODE 3
#define AG_STACK_ERROR_CODE     4
#define AG_SEMANTIC_ERROR_CODE  5
#endif

extern detag2_pcb_type detag2_pcb;
void init_detag2(void);
void detag2(void);
#endif