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#ifndef OPTABLE_H
#define OPTABLE_H
#include <stdio.h>
#include <stdbool.h>
#include "stack.h"
#include "errorhandler.h"
#define OPTABLE_MAX_SIZE 1024
#define DEFINED_FUNC_MAX_LENGTH 1024
#define WORD_LEN_LIMIT 255
typedef struct optable optable;
typedef struct wordop wordop;
typedef struct forthmachine forthmachine;
typedef void (*stackop)(forthmachine* fm);
typedef void (*directiveop)(forthmachine* fm, int len, char* line, int* i);
typedef enum {
compileditem_stackop = 0,
compileditem_literal = 1,
compileditem_ifcontrol = 2,
compileditem_doloopcontrol = 3,
} compileditem_type;
typedef struct {
compileditem_type type;
union {
wordop* wordop;
stackitem literal;
struct {
int jumpto;
};
int loopbackto;
};
} compileditem;
typedef enum {
optype_builtin = 0,
optype_compiled = 1,
} optype;
struct wordop {
char* word;
optype optype;
union {
stackop op;
struct {
compileditem* oplist;
int oplistlen;
};
};
};
struct optable {
int len;
wordop* optable;
errorhandler errorhandler;
};
/**
* getop returns the first wordop in the optable which is called by the word given as a parameter
* if none exist, returns 0
*/
wordop* optable_getop(optable* optable, char *word);
void optable_defineop(optable* optable, char *input, int* starti);
optable* optable_new(errorhandler errorhandler);
struct forthmachine {
optable* ot;
stack* s;
char* outputbuffer;
errorhandler errorhandler;
stack* lcs;
};
#define MAX_OUTPUT_BUFFER_SIZE 1024
forthmachine* forthmachine_new(errorhandler errorhandler);
void forthmachine_eval(forthmachine* fm, int len, char* line);
#endif //OPTABLE_H
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