#include "limits.h"
#include "tape.h"         /* Cover possibly undefined structures */
#include "quint.h"        /* Cover possibly undefined structures */
#include "macro.h"        /* Cover possibly undefined structures */

extern char filename[PATHSIZE];     /* name of the file that was just read */
extern char ans[ANS_LENGTH];   /* buffer for tokens that are input by user*/


/*******  declared in tm.c  */

extern char tm_state;  /* the turing machine state */
extern int tm_num_exe; /* number of executions of quints*/
extern int trace;     /* flag whether or not to show the tape at each step*/
extern int debug;     /* turn debug on or off    */
extern int max_step;   /* maximum steps to take with 'go' */

/*** 'WATCH' variables****/

extern char watch_state[];   /* buffer for states to watch */
extern int nwatchstate;

extern char watch_symbol[];  /* buffer for symbols to watch */
extern int nwatchsymbol;


/*************************************************************************
      STATUS VALUES
**************************************************************************/

#define OK              1   /* successful completion-- no message  */
#define COM_TOO_LONG   -1   /* quintuple comment is too long */
#define END_IN_LR      -2   /* quintuple fails to end in 'l' or 'r' */
#define QEXISTS        -3   /* quintuple already exists */
#define NEEDS_5        -4   /* quintuple must have five characters */
#define NO_MLIST       -5   /* no macro list exists */
#define HALTED         -6   /* machine has halted.  */
#define HALTED_FINAL   -7   /* machine has halted in a final state */
#define MEM_ERROR      -8   /* memory allocation error-- out of memory(?) */
#define OUT_OF_MEMORY MEM_ERROR         /* Out of Memory */
#define NO_SUCH_Q      -9   /* no such quintuple exists  */
#define NO_QLIST      -10   /* there is no quintuple list */
#define EMPTY_QLIST   -11   /* the quintuple list is empty */
#define NO_READ_OPEN  -12   /* can't open a file to read */
#define EMPTY_QFILE   -13   /* the .tm file has no quintuples */
#define EMPTY_MFILE   -14   /* the .mac file has no macro words */
#define NO_STR_END    -15   /* the end of string wasn't found on a file line*/
#define NO_MACRO      -16   /* there is no macro list */
#define EMPTY_MACRO   -17   /* the macro list is empty */
#define NO_WRITE_OPEN -18   /* a file can't be opened for write */
#define WORD_TOO_LONG -19   /* a word was too long */
#define CANT_INSERT   -20   /* can't insert a macro word at this location */
#define SHOW_TAPE     -22   /* tells the program to show the tape */
#define NO_SHOW_TAPE  -23   /* tells the program not to show the tape */
#define NON_HAVE_STATE -24  /* no quintuple has the requested col 1 state */
#define STATE_BUT_NO_SYM -25 /* quint has the col 1 state, but not the sym*/
#define WORD_NOT_FOUND -26  /* couldn't find the input macro word on the list*/
#define NO_TAPE       -27   /* there is no tape. */
#define CANT_RUN_RUN  -28   /* can't put 'run' in a macro... recursive call */
#define AT_BREAK_POINT -29  /* one_step has encountered a break point */
#define AT_STATE_WATCH -30  /* one_step has found state watch point */
#define AT_SYMBOL_WATCH -31 /* one_step has found symbol watch point */

/*******************************
  Some function prototypes
********************************/
extern void message(char*, int);
extern char getline(FILE*, char*, int);