mirror of https://github.com/RevCurtisP/C02.git
693 lines
22 KiB
C
693 lines
22 KiB
C
/* Simple 6502 Assembler *
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* for C02 Compiler *
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* Uses DASM Syntax but *
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* supports 65C02 Op Codes */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "a02.h"
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#define DEBUG TRUE
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enum otypes {BINFIL, PRGFIL}; //Object File Types
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char objtyp; //Object File Type
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int orgadr; //Origin Address
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int curadr; //Current Address
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int lstadr; //List Address
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struct sym {int block; char name[MAXLBL+1]; int bytes, value, refrd;};
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struct sym symbol; //Current Symbol
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struct sym symtbl[MAXSYM]; //Global Symbol Table
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int symcnt; //Number of Global Labels
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int blknum; //Local Label Block Number (0 = Global)
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char label[MAXSTR]; //Assembly Line Label
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char mnmnc[MAXSTR]; //Opcode Mnemonic
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char oprnd[MAXSTR]; //Opcode Mnemonic
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char cmmnt[MAXSTR]; //Assembly Line Comment
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char mcode[MAXSTR]; //Generated Bytes
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char strng[MAXSTR]; //Parsed String
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int opridx; //Index into Operand
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unsigned char token, opmod; //OpCode Token, Modifier
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unsigned int amode; //Addressing Modes
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int zpage, opval; //ZeroPage Flag, Operand Value
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char hexadr[6]; //Current Address in Hexadecimal
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char bytstr[5]; //String Representation of Byte
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char inplin[MAXSTR]; //Input Buffer
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char *linptr; //Pointer into Input Buffer
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int lineno; //Input File Line Number
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int savlno; //Line Number (Saved)
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int passno; //Assembler Pass Number (1 or 2)
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int endasm; //End Assembly Flag
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char prgnam[256]; //Assembler Path and Name (from Command Line)
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char inpnam[256]; //Input File Name
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char outnam[256]; //Output File Name
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char lstnam[256]; //List File Name
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char incnam[256]; //Include File Name
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FILE *inpfil; //Input File Pointer
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FILE *outfil; //Output File Pointer
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FILE *lstfil; //List File Pointer
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FILE *incfil; //Include File Pointer
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/* Print Error Message and Exit */
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void xerror(char* format, char *s) {
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if (lineno) fprintf(stderr, "%04d: ", lineno);
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fprintf(stderr, format, s);
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exit(EXIT_FAILURE);
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}
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/* Open File with Error Checking */
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FILE * opnfil(char* name, char* mode) {
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if (DEBUG) printf("Opening file '%s' with mode '%s'\n", name, mode);
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FILE *fp = fopen(name, mode);
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if (!fp) xerror("Error Opening File '%s'\n", name);
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return fp;
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}
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/* Skip Character in Input Line *
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* Args: c - Character to Skip *
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* Updates: linptr */
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int skpchr(char c) {
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if (*linptr == c) {linptr++; return TRUE;}
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else return FALSE;
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}
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/* Skip Spaces in Input Line *
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* Updates: linptr */
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void skpspc(void) {
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while (*linptr && *linptr <= ' ') linptr++;
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}
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/* Parse Word from Input Line *
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* Args: skip - Skip Spaces Flag *
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* *word - Buffer for Word *
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* Updates: linptr *
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* Returns: Word Found (TRUE/FALSE) */
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int pword(int skip, char* word) {
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int wrdlen = 0;
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if (skip) skpspc();
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while (isalnum(*linptr) || *linptr == '_') {
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word[wrdlen++] = toupper(*linptr);
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linptr++;
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}
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word[wrdlen] = 0; //Terminate String
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if (wrdlen) return TRUE; else return FALSE;
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}
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struct sym *fndsym(int block, char* name) {
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for (int i=0; i < symcnt; i++) {
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if (symtbl[i].block != block || strcmp(symtbl[i].name,name)) continue;
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return &symtbl[i];
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}
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return NULL;
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}
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/* Set Symbol Value and Size */
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void setsym(int value, int bytes) {
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if (DEBUG) printf("Setting Symbol %s to %d\n", symbol.name, value);
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symbol.value = value;
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if (bytes) symbol.bytes = bytes;
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else symbol.bytes = (value > 0xFF) ? 2 : 1;
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symbol.refrd = FALSE;
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}
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/* Add Character to Beginning of String */
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void pfxstr(char c, char* s) {
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for (int i=strlen(s)+1; i; i--)
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s[i] = s[i-1]; //Copy All Characters to the Right
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s[0] = c; //Insert Character at Beginning
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}
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/* Parse Label from Input Line
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* Sets: label
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* Updates: linptr
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* Returns: Label Found (TRUE/FALSE) */
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int plabel(void) {
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if (DEBUG) puts("Parsing Label");
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int block = (skpchr('.')) ? blknum : 0; //Local Label Block Number
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int found = pword(FALSE, label); //Parse Word without Skipping Spaces
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if (DEBUG) {
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if (found) printf("Found Label %s\n", label);
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else puts("No Label Found");
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}
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skpchr(':'); //Skip Optional Label Terminator
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if (found && passno == 1) {
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if (label[0] && fndsym(block, label)) xerror("Duplicate Label %s Encountered\n", label);
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if (DEBUG) printf("Initializing Symbol %s\n", label);
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symbol.block = block;
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if (strlen(label) > MAXLBL) xerror("Label %s Too Long\n", label);
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strcpy(symbol.name, label);
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setsym(curadr, 0);
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}
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if (block) pfxstr('.', label);
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skpspc(); //Skip to Mnemonic, Comment, or EOL
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return found;
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}
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/* Copy Character to Operand and Increment */
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int cpychr(int c) {
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if (c && toupper(*linptr) != c) return FALSE;
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if (opridx < MAXSTR) oprnd[opridx++] = toupper(*linptr);
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linptr++;
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return TRUE;
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}
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/* Evaluate Binary Number */
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int evlbin() {
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int result = 0;
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cpychr('%');
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while (isdigit(*linptr)) {
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if (*linptr > '1') break;
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result = (result << 1) + *linptr - '0';
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cpychr(0);
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}
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return result;
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}
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/* Evaluate Binary Number */
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int evlchr() {
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int result = 0;
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cpychr('\'');
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result = *linptr;
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cpychr(0);
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cpychr('\'');
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return result;
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}
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/* Evaluate Decimal Number */
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int evldec() {
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int result = 0;
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while (isdigit(*linptr)) {
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result = result * 10 + *linptr - '0';
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cpychr(0);
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}
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return result;
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}
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/* Evaluate Hexadecimal Number */
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int evlhex() {
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int result = 0;
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cpychr('$');
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while (isxdigit(*linptr)) {
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int digit = *linptr - '0';
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if (digit > 9) digit = digit - 7;
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result = (result << 4) + digit;
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cpychr(0);
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}
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return result;
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}
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/* Evaluate Symbol */
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struct sym *evlsym() {
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char name[MAXSTR];
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int block = (cpychr('.')) ? blknum : 0;
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pword(TRUE, name);
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for (int i=0; name[i]; i++) if (opridx<MAXSTR) oprnd[opridx++] = name[i];
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struct sym *result = fndsym(block, name);
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if (passno == 2 && result == NULL) xerror("Undefined Symbol %s\n", name);
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if (result) result->refrd = TRUE; //Symbol was Referenced
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return result;
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}
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/* Evaluate Term in Operand */
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int evltrm() {
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int result;
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skpspc();
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if (isalpha(*linptr) || *linptr == '.') {
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struct sym *target = evlsym();
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result = (target) ? target->value : 0x100;
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}
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else if (isdigit(*linptr))
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result = evldec();
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else switch(*linptr) {
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case '$': result = evlhex(); break;
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case '%': result = evlbin(); break;
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case '\'': result = evlchr(); break;
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default: result = -1;
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}
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skpspc();
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if (DEBUG) printf("Term Evaluated to %d\n", result);
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return result;
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}
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/* Evaluate Operand */
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int evlopd(int maxsiz) {
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int result = 0;
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int hilo = 0; //Return LSB (1) or MSB (2)
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int prns; //Optional Parenthesis after Hi/Low Operator
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if (DEBUG) puts("Evaluating Operand");
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skpspc();
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if (cpychr('<')) hilo = 1;
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else if (cpychr('>')) hilo = 2;
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if (hilo) prns = cpychr('(');
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result = evltrm();
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if (result >= 0)
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while (cpychr('+')) {
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int opdval = evltrm();
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if (opdval < 0) break;
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result += opdval;
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}
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if (hilo) {
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if (result < 0) xerror("Hi/Low Operator Requires Operand", "");
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if (prns) cpychr(')'); //
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switch (hilo) {
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case 1: result = result & 0xFF; break; //LSB
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case 2: result = result >> 8; break; //MSB
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}
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}
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if (DEBUG) printf("Operand Evaluated to %d\n", result);
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if (result > maxsiz) xerror("Operand Value too Large\n", "");
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return result;
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}
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/* Write Byte to Output File */
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void outbyt(int b) {
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if (curadr > -1) curadr++;
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if (passno != 2) return;
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fputc(b & 0xFF, outfil);
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sprintf(bytstr, "%02X ", b);
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if (strlen(mcode) < 9) strcat(mcode, bytstr);
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}
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/* Write Word to Output File */
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void outwrd(int w) {
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outbyt(w & 0xff);
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outbyt(w >> 8);
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}
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/* Lookup Opcode */
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int lkpopc(struct opc opl[]) {
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if (DEBUG) printf("Looking up Mnemonic %s\n", mnmnc);
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token = 0xFF; //Set Token to Invalid
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char mne[5]; strncpy(mne, mnmnc, 4); mne[4] = 0; //Truncate Mnemonic to Four Characters
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for (int i=0; opl[i].name[0]; i++) {
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if (strcmp(opl[i].name, mne)) continue;
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token = opl[i].token;
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amode = opl[i].amode;
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if (DEBUG) printf("Found token %02X, amode %04X\n", token, amode);
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return TRUE;
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}
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return FALSE;
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}
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/* Assemble BYTE Pseudo-Op */
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void asmbyt(void) {
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if (DEBUG) puts("Assembling BYTE Pseudo-Op");
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do {
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if (cpychr('"')) { //String Operand
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while (!cpychr('"')) {outbyt(*linptr); cpychr(0); }
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skpspc();
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} else
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outbyt(evlopd(0xFF)); //Evaluate Operand
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} while (cpychr(','));
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}
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/* Assemble HEX Pseudo-Op */
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void asmhex(void) {
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if (DEBUG) puts("Assembling HEX Pseudo-Op");
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do {outbyt(evlhex(0xFF)); } while (cpychr(','));
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}
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/* Assemble WORD Pseudo-Op */
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void asmwrd(void) {
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do {
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outwrd(evlopd(0xFFFF)); //Evaluate Operand
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} while (cpychr(','));
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}
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/* Assemble FILL Pseudo-Op */
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void asmaln(void) {
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if (DEBUG) puts("Assembling ALIGN Pseudo-Op");
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int size = evlopd(0xFFFF); if (size < 2) return;
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if (DEBUG) printf("Aligning to %d Bytes\n", size);
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int fill = size - (curadr % size); if (fill == size) return;
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if (DEBUG) printf("Filling %d Bytes\n", fill);
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for (int i=0; i<fill; i++) outbyt(0);
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}
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/* Assemble FILL Pseudo-Op */
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void asmfll(void) {
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if (DEBUG) puts("Assembling FILL Pseudo-Op");
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int size = evlopd(0xFFFF);
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if (DEBUG) printf("Filling %d Bytes\n", size);
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for (int i=0; i<size; i++) outbyt(0);
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}
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/* Assemble EQU Pseudo-Op */
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void asmequ(void) {
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if (label[0] == 0) xerror("EQUate without Label", 0);
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setsym(evlopd(0xFFFF), 0);
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}
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/* Assemble ORG Pseudo-Op */
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void asmorg(void) {
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orgadr = evlopd(0xFFFF);
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if (passno == 1 && symbol.name[0]) {
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symbol.value = orgadr;
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symbol.bytes = 2;
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}
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if (passno == 2 && objtyp == PRGFIL)
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outwrd(orgadr);
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curadr = orgadr;
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lstadr = orgadr;
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}
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/* Assemble PROCESSOR Pseudo-Op */
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void asmprc(void) {
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skpspc();
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while (isalnum(*linptr)) cpychr(0);
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if (DEBUG) printf("Ignoring Operand %s\n", oprnd);
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}
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/* Assemble SUBROUTINE Pseudo-Op */
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void asmsub(void) {
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blknum++;
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sprintf(oprnd, "%d", blknum); opridx = strlen(oprnd);
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if (DEBUG) printf("Block Number set to %s\n", oprnd);
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}
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/* Assemble INCLUDE Pseudo-Op */
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void asminf(void) {
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int incidx = 0;
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if (DEBUG) puts("Assembling INCLUDE Pseudo-Op");
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if (incfil) xerror("Nested INCLUDE not Allowed", "");
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if (!cpychr('"')) xerror("File Name Must be Quoted", "");
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printf("%d: '%c'\n", linptr, *linptr);
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while (*linptr && !cpychr('"')) {
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char c = *linptr; if (c == '/') c = '\\'; //Reverse Slashes for DOS/Windows
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incnam[incidx++] = c;
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cpychr(0);
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}
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incnam[incidx] = 0; //Terminate Include Name
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if (incidx == 0) xerror("INCLUDE requires file name\n", "");
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if (DEBUG) printf("Include File Set to Name to ''\n", incnam);
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}
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/* Assemble END Pseudo-Op */
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void asmend(void) {
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endasm = TRUE;
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}
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/* Assemble Pseudo-Op */
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int asmpso(int dot) {
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if (lkpopc(psolst) == FALSE && dot == FALSE) return FALSE;
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skpspc();
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if (DEBUG) printf("Assembling Pseudo-Op %s, Token '%c'\n", mnmnc, token);
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switch (token) {
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case '=': asmequ(); break; //EQU
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case 'B': asmbyt(); break; //BYTE
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case 'H': asmhex(); break; //BYTE
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case 'W': asmwrd(); break; //WORD
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case 'F': asmfll(); break; //FILL
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case 'S': asmsub(); break; //SUBRoutine
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case 'I': asminf(); break; //INCLude
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case '*': asmorg(); break; //ORG
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case 'P': asmprc(); break; //PROCessor
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case 'E': asmend(); break; //END
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case 'A': asmaln(); break; //ALIGn
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default: xerror("Undefined Pseudo-Op %s\n", mnmnc);
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}
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if (dot) pfxstr('.', mnmnc);
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return TRUE;
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}
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/* Check for Valid Addressing Mode */
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int chkmod(int mode) {
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char* s = NULL; //Pointer to Addressing Mode Description
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for (int i=0; amdesc[i].amode; i++)
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if (amdesc[i].amode == mode) {s = amdesc[i].desc; break;}
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if (DEBUG) printf("Checking Addressing Mode %s, %04X against %04X\n", s, mode, amode);
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if (mode & amode) return TRUE;
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xerror("Invalid Addressing Mode %s", s);
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}
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/* Assemble Branch Opcode */
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void asmbrn(void) {
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int offset = 0;
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if (DEBUG) printf("Assembling Branch Opcode Token 0x%02X\n", token);
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zpage = TRUE;
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if (isalpha(*linptr) || *linptr =='.') {
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struct sym *target = evlsym();
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if (target) offset = (target->value - curadr - 2);
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}
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else if (cpychr('+')) offset = evlopd(0xFF);
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else if (cpychr('-')) offset = -evlopd(0xFF);
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else xerror("Illegal Branch Operand\n", "");
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if ((offset > 127 || offset < -128) && passno == 2)
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xerror("Branch Out of Range\n", "");
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if (DEBUG) printf("Branch Offset %d\n", offset);
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opval = offset & 0xFF;
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}
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/* Assemble Immediate Mode Instruction */
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void asmimd(void) {
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if (DEBUG) printf("Assembling Immediate Opcode Token 0x%02X\n", token);
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opval = evlopd(0xFF);
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zpage = TRUE;
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opmod = 0x08; //Immediate
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}
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/* Assemble Indirect Mode Instruction */
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void asmind(void) {
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if (DEBUG) puts("Assembling Indirect Mode Instruction");
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zpage = TRUE; opval = evlopd(0xFFFF);
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if (cpychr(',') && cpychr('X') && chkmod(INDCX)) cpychr(')'); ////(Indirect,X) opmod=0
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else if (cpychr(')')) {
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if (cpychr(',') && cpychr('Y') && chkmod(INDCY)) opmod = 0x10; //(Indirect),Y
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else if (chkmod(INDCT)) opmod = 0x11; //(Indirect)
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if (token == 0x4C) zpage = FALSE; //JMP (Indirect Absolute)
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}
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else chkmod(0); //Illegal Addressing Mode
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if (zpage && opval > 0x00FF) xerror("Operand Value too Large\n", "");
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}
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/* Assemble Implied/Accumulator/Absolute/ZeroPage Mode Instruction */
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void asmiaz(void) {
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opval = evlopd(0xFFFF);
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if (opval < 0) {
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if (amode != IMPLD) //Implied
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if (chkmod(ACMLT)) opmod = 0x08; //Accumulator
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return;
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}
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if (DEBUG) printf("Assembling Absolute/ZeroPage 0x%02X\n", token);
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zpage = (opval <= 0xff) ? TRUE : FALSE;
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if (zpage && chkmod(ZPAGE)) opmod = 0x04; //ZeroPage
|
|
else if (chkmod(ABSLT)) opmod = 0x0C; //Absolute
|
|
if (cpychr(',')) {
|
|
if (cpychr('X')) {
|
|
if (zpage && chkmod(ZPAGX)) opmod = 0x14; //ZeroPage,X
|
|
else if (chkmod(ABSLX)) opmod = 0x1C; //Absolute,X
|
|
} else if (cpychr('Y')) {
|
|
if (zpage && (token == 0x82 || token == 0xA2))
|
|
opmod = 0x14; //ZeroPage,Y
|
|
else {zpage = FALSE; opmod = 0x18;} //Absolute,Y
|
|
} else chkmod(0); //Illegal Addressing Mode
|
|
}
|
|
}
|
|
|
|
/* Fix Opcode (if needed) */
|
|
unsigned char fixopc(void) {
|
|
if (DEBUG) printf("Fixing OpCode $%02X+$%02X\n", token, opmod);
|
|
for (int i=0; opfix[i].token; i++)
|
|
if (opfix[i].token == token && opfix[i].opmod == opmod)
|
|
return opfix[i].opcode;
|
|
return token + opmod;
|
|
}
|
|
|
|
/* Ouput Opcode Debug Info */
|
|
void dbgopc(void) {
|
|
if (DEBUG) printf("token=$%02X, opmod=$%02X, Address Mode: ", token, opmod);
|
|
switch (opmod) {
|
|
case 0x00: if (amode == IMPLD) puts("Implied"); else puts("(Indirect,X)"); break;
|
|
case 0x08: if (opval < 0) puts("Accumulator"); else puts("#Immediate"); break;
|
|
case 0x10: puts("(Indirect),Y"); break;
|
|
case 0x11: puts("(Indirect)"); break;
|
|
case 0x04: puts("ZeroPage"); break;
|
|
case 0x0C: puts("Absolute"); break;
|
|
case 0x14: if ((token == 0x82 || token == 0xA2)) puts("ZeroPage,Y");
|
|
else puts("ZeroPage,X"); break;
|
|
case 0x1C: puts("Absolute,X"); break;
|
|
case 0x18: puts("Absolute,Y"); break;
|
|
default: puts("UNKOWN");
|
|
}
|
|
if (opval < 0) puts("No Operand");
|
|
else {
|
|
printf("Operand Value %d, ", opval);
|
|
if (zpage) puts("Zero Page"); else puts("Absolute");
|
|
}
|
|
}
|
|
|
|
/* Assemble Opcode */
|
|
int asmopc(int dot) {
|
|
opmod = 0;
|
|
if (asmpso(dot)) return TRUE; //Check For/Assemble Pseudo-Op
|
|
if (lkpopc(opclst) == FALSE) xerror("Invalid Mnemonic %s\n", mnmnc);
|
|
if (DEBUG) printf("Assembling Opcode Token 0x%02X, ", token);
|
|
if (DEBUG) printf("Addressing Mode Mask 0x%04X\n", amode);
|
|
skpspc();
|
|
if (amode == RELTV) asmbrn(); //Branch (Relative) Instruction
|
|
else if (cpychr('#')) asmimd(); //Assemble Implied Instruction
|
|
else if (cpychr('(')) asmind(); //Assemble Indirect Instruction
|
|
else asmiaz(); //Assemble Implied/Accumulator/Absolute/ZeroPage Instruction
|
|
if (DEBUG) dbgopc();
|
|
int opcode = fixopc();
|
|
if (DEBUG) printf("Writing OpCode $%02X\n", opcode);
|
|
outbyt(opcode);
|
|
if (opval >= 0) {
|
|
if (zpage) outbyt(opval); //Byte Operand
|
|
else outwrd(opval); //Word Operand
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Parse Opcode Mnemonic from Input Line
|
|
* Sets: mnmnc
|
|
* Updates: linptr
|
|
* Returns: Label Found (TRUE/FALSE) */
|
|
int pmnmnc(void) {
|
|
if (DEBUG) puts("Parsing Mnemonic");
|
|
int dot = cpychr('.'); //Optional Dot before Pseudo-Op
|
|
int found = pword(TRUE, mnmnc);
|
|
opridx = 0; //Initialize Operand Index
|
|
if (found) asmopc(dot);
|
|
oprnd[opridx] = 0; //Terminate Operand String
|
|
return found;
|
|
}
|
|
|
|
/* Parse Comment from Input Line
|
|
* Sets: cmmnt
|
|
* Updates: linptr */
|
|
void pcmmnt(void) {
|
|
skpspc();
|
|
int i = 0;
|
|
while (*linptr >= ' ') cmmnt[i++] = *linptr++;
|
|
cmmnt[i] = 0; //Terminate Comment
|
|
if (DEBUG) {if (i) printf("Comment: %s\n"); else puts("No Comment Found");}
|
|
}
|
|
|
|
/* Add Label to Symbol Table */
|
|
void addsym() {
|
|
if (symbol.value<0) xerror("Origin Not Set", "");
|
|
memcpy(&symtbl[symcnt++], &symbol, sizeof(symbol));
|
|
}
|
|
|
|
|
|
/* Open Include File */
|
|
void opninc(void) {
|
|
if (DEBUG) printf("Opening Include File %s\n", incnam);
|
|
if (lstfil) fputs("\n", lstfil);
|
|
incfil = opnfil(incnam, "r");
|
|
savlno = lineno;
|
|
lineno = 1;
|
|
}
|
|
|
|
/* Close Include File */
|
|
void clsinc(void) {
|
|
if (DEBUG) printf("Closing Include File %s\n", incnam);
|
|
if (lstfil) fputs("\n", lstfil);
|
|
fclose(incfil);
|
|
incfil = NULL;
|
|
incnam[0] = 0;
|
|
lineno = savlno;
|
|
endasm = FALSE; //Clear End Flag for Return to Maun File
|
|
}
|
|
|
|
/* Assemble Input File (Two Pass) *
|
|
* Args: pass - Assembly Pass (1 or 2) *
|
|
* Requires: inpfil - Input File Pointer *
|
|
* Uses: inplin - Input Line Buffer *
|
|
* lineno - Input File Line Number */
|
|
void asmfil(int pass) {
|
|
endasm = FALSE; //Reset End Assembly Flag
|
|
passno = pass; //Assembly Pass Number
|
|
if (DEBUG) printf("Assembling Pass %d\n", pass);
|
|
lineno = 1; //Initialize Input File Line Number
|
|
blknum = 1; //Initialize Local Block Number
|
|
orgadr = -1; //Origin Address Not Set
|
|
curadr = orgadr; //Set Current Address to Origin
|
|
rewind(inpfil); //Start at Beginning of Input File
|
|
while (TRUE) {
|
|
if (incfil) linptr = fgets(inplin, MAXSTR, incfil);
|
|
else linptr = fgets(inplin, MAXSTR, inpfil);
|
|
if (endasm || linptr == NULL) {if (incfil) {clsinc(); continue;} else break;}
|
|
if (DEBUG) printf("%05d %04X: %s", lineno, curadr, inplin);
|
|
lstadr = curadr; //Set List Address
|
|
mcode[0] = 0; //Clear Generated Macbine Code
|
|
plabel(); //Parse Label
|
|
pmnmnc(); //Parse Mnemonic
|
|
pcmmnt(); //Parse Comment
|
|
if (passno == 1 && label[0]) addsym(); //Add Label to Table
|
|
if (passno == 2) {
|
|
if (lstadr < 0) hexadr[0] = 0; else sprintf(hexadr, "%04X", lstadr);
|
|
fprintf(lstfil, "%05d %-4s %-9s%-7s %-5s %-16s %s\n", lineno, hexadr, mcode, label, mnmnc, oprnd, cmmnt );
|
|
fflush(lstfil); //Flush Output Buffer in case of Segmentation Fault
|
|
}
|
|
lineno++;
|
|
if (incnam[0] && incfil == NULL) opninc(); //Open Include File
|
|
}
|
|
}
|
|
|
|
/* Print Symbol Table */
|
|
void prtsym(void) {
|
|
fprintf(lstfil, "\n%s Symbol Table\nBlock Name Size Value Rfd\n", "Global");
|
|
for (int i=0; i<symcnt; i++) {
|
|
int refrd = (symtbl[i].refrd) ? '*' : ' ';
|
|
fprintf(lstfil, "%5d %-8s %4d %5d %c \n", symtbl[i].block, symtbl[i].name, symtbl[i].bytes, symtbl[i].value, refrd);
|
|
}
|
|
}
|
|
|
|
/* Parse Command Line Option */
|
|
int pcoptn(char *argval) {
|
|
if (argval[0] != '-') return FALSE;
|
|
char option = toupper(argval[1]);
|
|
if (DEBUG) printf(" Option '%c'\n", option);
|
|
switch(option) {
|
|
case 'P': objtyp = PRGFIL; break; //Commodore PRG File
|
|
default: xerror("Illegal Command Line Option %s\n", argval);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Parse Command Line Arguments */
|
|
void pcargs(int argc, char *argv[]) {
|
|
int argnum = 0;
|
|
for (int arg = 0; arg<argc; arg++) {
|
|
if (DEBUG) printf("Arg %d='%s'\n", arg, argv[arg]);
|
|
if (arg == 0) {strcpy(prgnam, argv[arg]); continue;}
|
|
if (pcoptn(argv[arg])) continue;
|
|
switch (argnum++) {
|
|
case 0: strcpy(inpnam, argv[arg]); break;
|
|
case 1: strcpy(outnam, argv[arg]); break;
|
|
case 2: strcpy(lstnam, argv[arg]); break;
|
|
default: xerror("Too Many Arguments\n", "");
|
|
}
|
|
}
|
|
///if (argnum<2) usage();
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
lstnam[0] = 0; lstfil = NULL; //Default to No List File
|
|
incnam[0] = 0; incfil = NULL; //Include File Not Opened
|
|
lineno = 0; //No Line Number (yet)
|
|
objtyp = BINFIL; //Default Object File Type to Binary
|
|
pcargs(argc, argv); //Parse Command Line Arguments
|
|
inpfil = opnfil(inpnam, "r"); //Open Input File
|
|
outfil = opnfil(outnam, "wb"); //Open Output File
|
|
if (lstnam[0]) //If List File Name Specified
|
|
lstfil = opnfil(lstnam, "w"); // Open List File
|
|
asmfil(1); //Assemble Input File (First Pass)
|
|
asmfil(2); //Assemble Input File (First Pass)
|
|
if (lstfil && symcnt) prtsym(); //Print Symbol Table
|
|
exit(0); //Exit with No Errors
|
|
}
|
|
|