#ifndef SCANNER_H
#define SCANNER_H

#include <sys/types.h>
#include <stdbool.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
	EMPTY
#ifndef __cplusplus
	, STRING, FLOAT, INT, OPERATOR, LIDENT, FIDENT, LOCATION, FUNCALL, EEK
#endif
} Type;

#define MAX_TYPE_NAME_LENGTH 16
extern const char *Type_Name[];

typedef enum
  {
   PLUS, MINUS, MUL, DIV, OP, CP, COMMA,
   LT, /* MUST be the first relational operation for parsing to work */
   LE, GE, GT, ISEQUAL, ABOUTEQ,
   NE, /* MUST be the last relational operation for parsing to work */
   POW, MOD
  } Operator;

#define MAX_OP_NAME_LENGTH 3
extern const char *Op_Name[];

typedef int Location[3];  /* NOTE: Locations are passed by REFERENCE not value */
  /* I.e., to accapt a Location argument, declare the parameter to be of type
     const Location*
  */

typedef enum { X=0, Y=1, Z=2, HYPER} Dimensions;

#define OLOCATION(loc) ((void)memset(loc, 0, sizeof(Location)))
#define IN_OCTANT(loc) (loc[X]>=0 && loc[Y]>=0 && loc[Z]>=0)
#define LOCATION_GETS(la,lb) ((void)memcpy(la, lb, sizeof(Location)))
#define SAME_LOC(la,lb) (memcmp(la,lb,sizeof(Location))==0)
#define LOCATION_SUB(la,lb) (la)[X]-=(lb)[X]; (la)[Y]-=(lb)[Y]; (la)[Z]-=(lb)[Z];
#define LOCATION_ADD(la,lb) (la)[X]+=(lb)[X]; (la)[Y]+=(lb)[Y]; (la)[Z]+=(lb)[Z];

bool loc_in_box(const Location test,
		const Location b, const Location c);

typedef struct Token_struc Token;

typedef struct
{
  int fident;
  int argc;
  Token *argv;
} FunctionCall;

typedef struct Token_struc
{
  Type type;
  union
  {
    char *string;
    double flt;
    long integer;
    Operator op;
    char *lident;
    int fident;
    Location location;
    FunctionCall funcall;
    char *err;
  } u;
} Token;

#define NULLTOKEN ((Token*)0)
#define EMPTY_TVEC ((Token**)0)

int identcode(const char *s, size_t len);
void duperror(Token* tok, const char* erro);
Token **scan(const char **s);
size_t printtok(char *dest, size_t size, size_t field_width,
		int quote_strings, int use_scientific,
		int precision, int verbose_error, const Token *tok);
void print(char *s, size_t size, size_t chars, int quote, int scientific, int precision, Token **n);

#ifdef __cplusplus
}
#endif

#endif