error.c

/*
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version
 *  2 of the License, or (at your option) any later version.
 *
 *  Copyright 2004 Spiro Trikaliotis
 *
 */

#include <windows.h>

#include <stdarg.h>
#include <stdio.h>
#include <assert.h>

#include "arch.h"


char *arch_strerror(unsigned int ErrorCode)
{
    static char ErrorMessageBuffer[2048];
    int n;

    // Write the error message into the buffer

    n = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS
                      | FORMAT_MESSAGE_MAX_WIDTH_MASK,
                      NULL,
                      ErrorCode,
                      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
                      (LPTSTR) &ErrorMessageBuffer,
                      sizeof(ErrorMessageBuffer)-1,
                      NULL);

    // make sure there is a trailing zero

    ErrorMessageBuffer[n] = 0;

    return ErrorMessageBuffer;
}

void arch_error(int AUnused, unsigned int ErrorCode, const char *Format, ...)
{
    va_list ap;
    char ErrorMessageBuffer[2048];
    char ErrorMessageBuffer2[2048];
    char *errorText = NULL;

    UNREFERENCED_PARAMETER(AUnused);

    // Write the optional string into the output

    if (Format && *Format)
    {
        va_start(ap, Format);

        _vsnprintf(ErrorMessageBuffer2, sizeof(ErrorMessageBuffer2), Format, ap);

        va_end(ap);

        // make sure there is a trailing zero

        ErrorMessageBuffer2[sizeof(ErrorMessageBuffer2) - 1] = 0;
    }

    // Get the error message

    if (ErrorCode != 0)
    {
        errorText = arch_strerror(ErrorCode);
    }

    // Append the message to the buffer. Make sure not to overwrite the buffer

    if (errorText)
    {
        _snprintf(ErrorMessageBuffer, sizeof(ErrorMessageBuffer), "%s: %s", ErrorMessageBuffer2, errorText);

        ErrorMessageBuffer[sizeof(ErrorMessageBuffer)-1] = 0;
    }
    else
    {
        assert(sizeof(ErrorMessageBuffer) >= sizeof(ErrorMessageBuffer2));

        strcpy(ErrorMessageBuffer, ErrorMessageBuffer2);
    }

    fprintf(stderr, "%s\n", ErrorMessageBuffer);

#if DBG

    {
        int n = strlen(ErrorMessageBuffer);

        if (n == sizeof(ErrorMessageBuffer))
            --n;

        ErrorMessageBuffer[n] = '\n';
        ErrorMessageBuffer[n+1] = 0;
        OutputDebugString(ErrorMessageBuffer);
    }

#endif
}