#include <stdio.h>
#include <stdlib.h>

#include "globals.h"


/* ===============================================
   skipSpaces(fp): skip white spaces in input
   =============================================== */
void skipSpaces( FILE *fp )
{
   int c;

   c = getc(fp);
   while ( isspace(c) )
   {
      c = getc(fp);
   }

   ungetc( c, fp );
}

/* ===============================================
   readToken(T, fp): read next token into T
   =============================================== */
void readToken( char T[], FILE *fp )
{
   int c;

   skipSpaces(fp);

   c = getc(fp);
   while ( ! isspace(c) )
   {
      *T++ = c;
      c = getc(fp);
   }

   *T = '\0';
}


/* ================================================================
   readMacro(fp): read macro definition
   ================================================================ */
void readMacro( FILE *fp )
{

}

/* ================================================================
   readComp(fp): read Logic-sim component definition
   ================================================================ */
void readComp( FILE *fp )
{
   /* -----------------------------------------------
      Read coordinate
      ----------------------------------------------- */
   readToken(coord, fp);


}



/* ================================================================
   readLogSimCmd(fp): read ONE logci-sim component (stop till ';')
   ================================================================ */
void readLogSimCmd( FILE *fp )
{
   int c;

   /* -----------------------------------------------
      Read circuit name (or Define circuitName)
      ----------------------------------------------- */
   readToken(circuit, fp);

   if ( strcmp( circuit, "Define" ) == 0 )
   {
      macro = 1;
      readToken(circuit, fp);

      readMacro( fp );
   }
   else
   {
      macro = 0;

      readComp( fp );
   }
}




int main(int argc, char *argv[])
{

   FILE *fp;
   FILE *ofp;

   if ( argc < 2 )
   {
      printf("Usage: %s circuit-file\n", argv[0]);
      exit(1);
   }

   if ( (fp = fopen(argv[1], "r")) == NULL )
   {
      printf("Error: cannot open circuit-file %s\n", argv[1]);
      exit(1);
   }

/*
   if ( (ofp = fopen("sim4.cc", "w")) == NULL )
   {
      printf("Error: cannot open OUTPUT circuit-file sim4.cc\n");
      exit(1);
   }
*/
   ofp = stdout;

   readComp(fp);

   if ( macro )
   {
      processMacro(ofp);
   }
   else
   {
      processComp(ofp);
   }
}