log.cpp

游戏中我们经常看到的影子效果

//////////////////////////////////////////////////////////////////////////////////////////
//	LOG.cpp
//	Functions for an error log
//	Downloaded from: www.paulsprojects.net
//	Created:	20th July 2002
//	Modified:	8th November 2002	-	Added "Output Misc"
//
//	Copyright (c) 2006, Paul Baker
//	Distributed under the New BSD Licence. (See accompanying file License.txt or copy at
//	http://www.paulsprojects.net/NewBSDLicense.txt)
//////////////////////////////////////////////////////////////////////////////////////////	
#include <stdarg.h>
#include <string.h>
#include "LOG.h"

//Initiate log
bool LOG::Init(char * newFilename)
{
	//Save filename
	if(filename)
		delete [] filename;

	filename=new char[strlen(newFilename)];
	if(!filename)
		return false;

	strcpy(filename, newFilename);

	//Open file, overwriting any previous contents
	logFile=fopen(filename, "wb");
	if(!logFile)
		return false;

	//Close the file
	fclose(logFile);
	logFile=NULL;

	return true;
}

//Output a newline
void LOG::OutputNewLine()
{
	//Open file to append
	logFile=fopen(filename, "a+");
	if(!logFile)
		return;

	//Write the newline
	putc('\n', logFile);

	//close the file
	fclose(logFile);
	logFile=NULL;
}

//Output Success
void LOG::OutputSuccess(char * text, ...)
{
	//Compile string to output
	va_list argList;
	va_start(argList, text);

	//Open file to append
	logFile=fopen(filename, "a+");
	if(!logFile)
		return;

	//Write the text
	fprintf(logFile, "<-> ");
	vfprintf(logFile, text, argList);
	putc('\n', logFile);

	//close the file
	fclose(logFile);
	logFile=NULL;
	va_end(argList);
}

//Output An Error
void LOG::OutputError(char * text, ...)
{
	//Compile string to output
	va_list argList;
	va_start(argList, text);

	//Open file to append
	logFile=fopen(filename, "a+");
	if(!logFile)
		return;

	//Write the text
	fprintf(logFile, "<!> ");
	vfprintf(logFile, text, argList);
	putc('\n', logFile);

	//close the file
	fclose(logFile);
	logFile=NULL;
	va_end(argList);
}

//Output Miscellaneous
void LOG::OutputMisc(char * text, ...)
{
	//Compile string to output
	va_list argList;
	va_start(argList, text);

	//Open file to append
	logFile=fopen(filename, "a+");
	if(!logFile)
		return;

	//Write the text
	fprintf(logFile, "<#> ");
	vfprintf(logFile, text, argList);
	putc('\n', logFile);

	//close the file
	fclose(logFile);
	logFile=NULL;
	va_end(argList);
}