////////////////////////////////////////////////////////////
// error.cpp
//
// Error message functions for EDrive, a multiplatform driving simulator
//
// Error messages are written to the file "error.log", although you
// could make some trivial changes to display them instead.
//
// Copyright 2004 by Evan Alexander Weaver
//
// Despite the copyright, this is free software. See edrive.cpp for details.
//
// Date last modified: 31 May 2004

#include <stdio.h>
#include <stdarg.h>
#include "error.h"

// If you are debugging on windows and want to pop up a message box, uncomment:
//#include <windows.h>

// Output the string in "msg" to the file "error.log". If the file can't
// be written to, nothing bad happens.
//
void error(const char *msg)
{
    // each time EDrive starts we want to start with a fresh log file
    static bool firsttime = true;

    FILE *fp = fopen("error.log", firsttime ? "w" : "a");
    firsttime = false;
    if (fp) {
	fprintf(fp, "%s\n", msg);
	fclose(fp);
    }

    // Uncomment the following line if you are debugging in Windows and
    // want to pop up an annoying message box:
    //MessageBox(NULL, msg, "EDrive Error", MB_OK);
}

// Output printf-style formatted data.
// Lazy Programmer Alert: don't try to output more than 399 characters in
// one call.
//
void errorf(const char *fmt, ...)
{
    char msg[400];
    va_list ap;
    va_start(ap, fmt);
    vsprintf(msg, fmt, ap);
    error(msg);
    va_end(ap);
}