main.c

< 虚拟机设计与实现> 的source code, linux版本

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+                                                                   +
+ main.c - this is the boot-strap file which conatins the entry     +
+          exit point of the HEC engine                             +
+                                                                   +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ includes                                                          + 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

#include <stdio.h>		/* ANSI C includes ------------------------*/

#include "common.h"		/* universal elements ---------------------*/
#include "cmdline.h"
#include "error.h"
#include "exenv.h"
#include "init.h"
#include "reformat.h"
#include "interrupt.h"
#include "run.h"
#include "dbgdata.h"

//#define DBG_MAIN		1

#ifdef DBG_MAIN
#define DBG_MAIN0(str)				printf("main(): "); printf(str);
#define DBG_MAIN1(str,arg1)			printf("main(): "); printf(str,arg1);
#define DBG_MAIN2(str,arg1,arg2)	printf("main(): "); printf(str,arg1,arg2);
#else
#define DBG_MAIN0(str)
#define DBG_MAIN1(str,arg1)
#define DBG_MAIN2(str,arg1,arg2) 
#endif	

int main(int argc, char *argv[])
{
	struct CmdLine cl;

	nErrors = 0;
	RAM = NULL;
	interruptOn = TRUE;

    DebugData_init();

	/*1) establishing error log */

	DBG_MAIN0("1) establishing error log\n");
    setUpErrorFile();
	if (nErrors > 1)
	{
		closeErrorFile();
		shutDown(SHUTDOWN_ERROR);
    }

	/*2) handle command line arguments, set computer switches */

	DBG_MAIN0("2) invoking handleArguments()\n");
	cl = handleArguments(argc, argv);
	if (cl.ok == FALSE)
	{
		closeErrorFile();
		shutDown(SHUTDOWN_ERROR);
	}

	/*3) init execution environment and load bytecode */

	DBG_MAIN0("3) invoking initHEC()\n");
	if (initHEC(cl) == FALSE)
	{ 
		DebugData_free();
		closeHEC();
		closeErrorFile();
		shutDown(SHUTDOWN_ERROR);
	}

	/*4) re-format numeric operands to native and verify */
	
	DBG_MAIN0("4) invoking reformat()\n");
	if (reformat() == FALSE)
	{ 
		DebugData_free();
		closeHEC();
		closeErrorFile();
		shutDown(SHUTDOWN_ERROR);
	}

	/*5) begin execution*/

	printDebugData(&debugData);

	DBG_MAIN0("5) invoking run()\n");
	runHEC(cl.debug);
    
	DebugData_free();
	closeHEC();
    closeErrorFile();
	printf("main(): exiting with (%d) errors\n", nErrors);
	return SHUTDOWN_OK;

} /*end main*/