mirror of
https://github.com/RevCurtisP/C02.git
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110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/************************************
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* C02 Declaration Compiling Routines *
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************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <errno.h>
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#include "common.h"
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#include "asm.h"
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#include "parse.h"
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#include "label.h"
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#include "vars.h"
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#include "cond.h"
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#include "expr.h"
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#include "stmnt.h"
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#include "dclrtn.h"
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/* Add Function Definition */
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void addfnc()
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{
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expect('(');
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strcpy(fncnam, word); //Save Function Name
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prmcnt = 0; //Set Number of Parameters
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skpspc(); //Skip Spaces
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if (isalph()) { //Parse Parameters
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reqvar(FALSE); //Get First Parameter
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strcpy(prmtra, value);
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prmcnt++;
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if (look(',')) {
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reqvar(FALSE); //Get Second Parameter
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strcpy(prmtry, value);
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prmcnt++;
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if (look(',')) {
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reqvar(FALSE); //Third Parameter
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strcpy(prmtrx, value);
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prmcnt++;
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}
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}
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}
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expect(')');
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if (look(';')) //Forward Definition
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return;
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setlbl(fncnam); //Set Function Entry Point
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if (prmcnt > 0)
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asmlin("STA", prmtra); //Store First Parameter
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if (prmcnt > 1)
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asmlin("STY", prmtry); //Store Second Parameter
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if (prmcnt > 2)
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asmlin("STX", prmtrx); //Store Third Parameter
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endlbl[0] = 0; //Create Dummy End Label
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pshlbl(LTFUNC, endlbl); //and Push onto Stack
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bgnblk('{'); //Start Program Block
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}
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/* (Check For and) Parse Variable Declaration*/
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void pdecl(int m, int t)
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{
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DEBUG("Processing variable declarations(s) of type %d\n", t);
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while(TRUE) {
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getwrd();
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if (match('(')) {
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if (m != MTNONE) {
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ERROR("Illegal Modifier %d in Function Definion", m, EXIT_FAILURE);
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}
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addfnc(); //Add Function Call
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return;
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}
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addvar(m, t);
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if (!look(','))
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break;
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}
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expect(';');
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DEBUG("Variable Declaration Completed\n", 0);
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SCMNT(""); //Clear Assembler Comment
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}
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/* Check for and Parse Type Keyword */
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int ptype(int m)
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{
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int result = TRUE;
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if (wordis("VOID"))
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pdecl(m, VTVOID); //Parse 'void' declaration
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else if (wordis("CHAR"))
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pdecl(m, VTCHAR); //Parse 'char' declaration
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else
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result = FALSE;
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//DEBUG("Returning %d from function ptype\n", result)'
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return result;
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}
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/* Check for and Parse Modifier */
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int pmodfr()
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{
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DEBUG("Parsing modifier '%s'\n", word);
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int result = TRUE;
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if (wordis("ALIGNED")) {
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getwrd();
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ptype(MTALGN);
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}
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else if (wordis("ZEROPAGE")) {
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getwrd();
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ptype(MTZP);
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}
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else
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result = FALSE;
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return result;
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}
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