20162004.h

#ifndef __MYHEADER__
#define __MYHEADER__

#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>

// Constants
#define MAXBUF 100
#define TOKENBUF 4
#define MEGA 1048576 // 2^20
#define HASHSIZE 20
#define SYMHASHSIZE 41
#define ESHASHSIZE 31
#define TOKLEN 31
#define TRMAXLEN 70
#define ADDRLEN 6

// Data Structures
struct historyNode{
    int n;
    char name[MAXBUF];
    struct historyNode *next;
    struct historyNode *last; // only used by head node to quickly find last node in list
};

struct opcodeNode{
    char op[10];
    unsigned char hex;
    char format[4];
    struct opcodeNode* next;
    struct opcodeNode* last;
};

struct symbolNode{
    char label[TOKLEN];
    unsigned int loc;
    struct symbolNode* next;
    struct symbolNode* last;
};

typedef struct intermediateRecordNode{
    unsigned int linenumber;
    unsigned int loc;
    long long int objectCode;
    int isComment;
    char label[TOKLEN];
    char opcode[TOKLEN];
    char operand[TOKLEN];
    char buffer[MAXBUF];
    char flag;
    int n, i, x, b, p, e;
} IMRNODE;

struct esNode{
    char SYMBOL[7];
    char flag; // indicates whether control section or symbol
    int address;
    int length;
    struct esNode* next;
    struct esNode* last;
};

struct textRecordNode{
    char record[TRMAXLEN];
    struct textRecordNode* next;
};

extern struct intermediateRecordNode** intermediateRecord;
extern int imIndex;

// Virtual Memory
extern unsigned char MEMORY[MEGA];

// Hash tables
extern struct opcodeNode* HASHTABLE[HASHSIZE]; // Operation Code Table
extern struct symbolNode* SYMTAB[SYMHASHSIZE]; // Symbol Table
extern int SYMTABCOUNT;


/* Function Declerations */
int runCommand(char**, int);

// general functions
void getInput(char*);
char** parseInput(char*, int*);
int removeCommas(char*);
void addHistory(char*);
int hexToInt(char*);
int power(int, int);
void printError(int);
void freeHistory(void);
void freeHashtable(void);
void freeArguments(char**);
int readline(char*, FILE*);
struct historyNode* getSetHistHead(void);
int findFile(char*);
int cmpExtension(const char*, const char*);
int stringToInt(char*);
int skipSpaces(const char*, int*);
int getToken(const char*, char*, int, int*);
struct textRecordNode* TRALLOC(void);
int isNumber(char*);
int newHexToInt(char*, int);
int newStringToInt(char*, int);


// Functions regarding memory
int memDump(char**, int);
int memEdit(char**, int);
int memFill(char**, int);
int memReset(void);

// opcode functions
int opInsert(void);
int opMnem(char**);
struct opcodeNode* opSearch(char*, int);
int opPrintOpcodelist(void);
int hashcode(char*, int);

// general shell command function
int funcHelp(void);
int funcDir(void);
int funcQuit(void);
int funcHistory(char*);
int funcType(char*);

// assembler functions
int asmAssemble(char*);
int asmFirstPass(char*);
int asmSecondPass(char*);
void initializeASM(int);
int asmSymTabInsert(char*, int, int);
int asmAddIMRecord(const int, int*, char*, char*, char*, char*, char);
int asmOperandLength(char*);
int asmIsSymbol(char*);
int asmCheckSymbol(char*, int);
int asmParseLine(char*, char*, char*, char*);
struct symbolNode* symSearch(char*, int);
int asmIsRegister(struct symbolNode*);
int asmCreateObjectCode(unsigned int, IMRNODE*, struct opcodeNode*, unsigned int, int);
void asmByteObjectCodeCreator(struct intermediateRecordNode*);
int asmPrintSymTab(void);
int asmWordObjectCodeCreator(struct intermediateRecordNode*);

// linker-loader functions
int llSetProgaddr(char*);
int llLoadProgram(char**, int);
int llFirstPass(FILE*, int);
int llSecondPass(FILE*, int);
struct esNode* esSearch(char*, int);
void llExtSymTabInsert(char*, int, int, char);
void printESTAB(void);
void resetESTAB(void);
void llPrintError(int, char*);
int llFindOpcodeFormat(unsigned char);
int llRun(void);
int llTargetAddress(int, int);
int llFetchFromMemory(int, int);
void llSetRegVal(int, int);
int llInterpretTA(int, unsigned char, int);
void llLoadToAddress(int address, int value, int n);
void llPrintReg(void);
int llBreakPoint(char**, int);
void llPrintBP(void);
int llAddBP(int, char*);
void llClearBP(int mode);
int llGetRegVal(int);

#endif