symboltable.h

#include <string.h>
void yyerror(char const *s);
#define SYMBOL_INTEGER 1
#define SYMBOL_STR 2
#define SYMBOL_ARRAY_INT 3
#define SYMBOL_ARRAY_STR 4

struct Fieldlist
{
	char *name;				//name of the field
	int fieldIndex;			//the position of the field in the field list
	struct Typetable *type; //pointer to type table entry of the field's type
	struct Fieldlist *next; //pointer to the next field
};
struct Fieldlist *Fhead, *Ftail;
struct Fieldlist *FLookup(char *name, struct Fieldlist *list);
void FInstall(struct Typetable *type, char *name);

struct Typetable
{
	char *name;				  //type name
	int size;				  //size of the type
	struct Fieldlist *fields; //pointer to the head of fields list
	struct Typetable *next;   // pointer to the next type table entry
};
struct Typetable *Thead, *Ttail;
struct Typetable *TLookup(char *name);
void TInstall(char *name, int size, struct Fieldlist *fields);

struct Paramstruct
{
	int amp;
	char *name;
	struct Typetable *type;
	struct Paramstruct *next;
};
struct Paramstruct *Phead = NULL, *Ptail = NULL;
void PInstall(char *name, struct Typetable *type);
struct Paramstruct *PLookup(char *name);

struct Gsymbol
{

	char *name;					   //name of the variable or function
	struct Typetable *type;		   //pointer to the Typetable entry of variable type/return type of the function
	int size;					   //size of an array or a user defined type. (The default types have size 1)
	int binding;				   // Address of the Identifier in Memory
	struct Paramstruct *paramlist; //pointer to the head of the formal parameter list in the case of functions
	int flabel;					   //label for identifying the starting address of the function's code in the memory
	struct Gsymbol *next;		   // Pointer to next Symbol Table Entry */
};
struct Gsymbol *GLookup(char *name);														// Look up for a global identifier
void GInstall(char *name, struct Typetable *type, int size, struct Paramstruct *paramlist); // Installation
struct Gsymbol *Ghead, *Gtail;

int totalCount = 4096;
int fbind = 0;

struct Lsymbol
{
	/* Here only name, type, binding and pointer to next entry needed */
	char *name;				//name of the variable
	struct Typetable *type; //pointer to the Typetable entry of variable type
	/***The TYPE field must be a TypeStruct if user defined types are allowed***/
	int binding;		  //stores memory address allocated to the variable
	struct Lsymbol *next; //points to the next Local Symbol Table entry
};
struct Lsymbol *Lhead, *Ltail;
struct Lsymbol *LLookup(char *name);
void LInstall(char *name, struct Typetable *type);