#ifndef RCALC_H
#define RCALC_H

typedef union {
  long alignment;
  char ag_vt_2[sizeof(int)];
  char ag_vt_3[sizeof(long)];
} rcalc_vs_type;

typedef enum {
  rcalc_ws_token = 1, rcalc_calculation_token = 3, rcalc_expression_token,
  rcalc_eof_token, rcalc_term_token, rcalc_factor_token = 9,
  rcalc_thousands_token = 15, rcalc_hundreds_token, rcalc_m_token = 18,
  rcalc_hundreds_field_token, rcalc_tens_token, rcalc_c_token = 22,
  rcalc_d_token, rcalc_count_hundreds_token, rcalc_tens_field_token,
  rcalc_units_token, rcalc_x_token = 28, rcalc_l_token,
  rcalc_count_tens_token, rcalc_i_token, rcalc_v_token,
  rcalc_count_units_token, rcalc_roman_numeral_token = 40
} rcalc_token_type;

typedef struct rcalc_pcb_struct{
  rcalc_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];
  rcalc_vs_type vs[128];
  int ag_ap;
  const char *error_message;
  char read_flag;
  char exit_flag;
  int input_context;
  int cs[128];
  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];
} rcalc_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 rcalc_pcb_type rcalc_pcb;
void init_rcalc(void);
void rcalc(void);
#endif