// asmmain.cpp  --- main program assembler, tsaiwn@csie.nctu.edu.tw
/******************************* 
   *** SISC Simple Assebler @CopyLeft by tsaiwn@csie.nctu.edu.tw
   for UNIX user:
   gcc asmmain.cpp asmutil.cpp asmpass1.cpp asmpass2.cpp asmutil2.cpp
   ./a.out
  ********** for PC user using TC++3.0 and/or other IDE:
   open a project and then add the above 5 "*.cpp" 
          files into the project
      Note that do NOT add the ".h" file like asmprot.h
 *********************************/
#define MAXSYM 999
#include<stdio.h>
#include<string.h>
#include "asmprot.h"
int lineNumber = 0;
int numInst = 0;  /* number of instructions */
int pc;  /*program counter*/
char token[20][38];  /* for tokens */
char comment[80];
FILE* fpIn, *fpOut;
char bufIn[80], bufOut[80];
char symbolTable[MAXSYM][10];
////////////////////////////////////////////////////////
// 注意, 以下的 opTable 應該參考課本 SIC 或 SIC/XE 的指令修正  
char opTable[][6]={   // each item has max of 5 chars (5+1 == 6)
     "NOP", "LOAD", "LDI", "STORE",
     "MOVE", "ADD", "FADD", "OR", "AND", "XOR",
     "ROT", "BR", "HALT","XXXXX","XXXXX","XXXXX",
     "GETC", "PUTC", "GETI", "PUTI", "GETS", "PUTS",
     "CMP", "JLT", "JEQ", "JGT"
   };
int numOp = sizeof(opTable) / sizeof opTable[0];
int numSym=0;  // number of items in Symbol table
/*** 以上也要在 asmprot.h 宣告 ***/

char fileIn[80], fileOut[80];
int main()
{
       /** printf("numOp=%d\n", numOp);  **/
   fprintf(stderr, "Filename of ASM source: ");
   fgets(fileIn, sizeof(fileIn), stdin);
   myChop(fileIn);
   fprintf(stderr, "output Filename for OBJ code: ");
   fgets(fileOut, sizeof(fileOut), stdin);
   myChop(fileOut);
   if( strcmp(fileIn,fileOut) == 0) {
      fprintf(stderr, 
         "%!Filename of OBJ can not equale to Input filename\n");
      return -1;  // tell him error 
   }
   fpIn = fopen(fileIn, "rt");
   if(! fpIn){
      fprintf(stderr, "Open source error: %s\n", fileIn);
      return -1;  // open error 
   }

   while(!feof(fpIn)){
       if(getNextLine(fpIn, bufIn)){
           printf("%4.3d   %s\n", ++lineNumber, bufIn);
       }else break;  //EOF
   }
   fclose(fpIn);

  /**********/
   fpIn = fopen(fileIn, "rt");
   fpOut = fopen(fileOut, "at");   // 或是用 "wt" 
   printf("\n===Assembling %s ...\n", fileIn);
   fprintf(fpOut, ";;;===Assembling %s ...\n", fileIn);
   lineNumber = 0;
   if(pass1(fpIn, fpOut) == 0){
      /**********/
      fclose(fpIn);
      fpIn = fopen(fileIn, "rt");
      pass2(fpIn, fpOut);
   }else{
      printf("Error found at Pass1.\n");
   }
   printf("=== Thank you for using the assembler.\n");
   fclose(fpIn);
   fclose(fpOut);
  /**********/
}//main(