devilutionX/Source/restrict.cpp

//HEADER_GOES_HERE

#include "../types.h"

BOOL __cdecl SystemSupported()
{
    OSVERSIONINFO VersionInformation;
    BOOL ret = FALSE;

    memset(&VersionInformation, 0, sizeof(VersionInformation));
    VersionInformation.dwOSVersionInfoSize = sizeof(VersionInformation);
    if (GetVersionEx(&VersionInformation)
        && VersionInformation.dwPlatformId == VER_PLATFORM_WIN32_NT
        && VersionInformation.dwMajorVersion >= 5) {
        ret = TRUE;
    }
    return ret;
}

BOOL __cdecl RestrictedTest()
{
    FILE *f;
    char Buffer[MAX_PATH];
    BOOL ret = FALSE;

    if (SystemSupported() && GetWindowsDirectory(Buffer, sizeof(Buffer))) {
        strcat(Buffer, "\\Diablo1RestrictedTest.foo");
        f = fopen(Buffer, "wt");
        if (f) {
            fclose(f);
            remove(Buffer);
        } else {
            ret = TRUE;
        }
    }
    return ret;
}

BOOL __cdecl ReadOnlyTest()
{
    char *c;
    FILE *f;
    char Filename[MAX_PATH];
    BOOL ret = FALSE;

    if (GetModuleFileName(ghInst, Filename, sizeof(Filename))) {
        c = strrchr(Filename, '\\');
        if (c) {
            strcpy(c + 1, "Diablo1ReadOnlyTest.foo");
            f = fopen(Filename, "wt");
            if (f) {
                fclose(f);
                remove(Filename);
            } else {
                ret = TRUE;
            }
        }
    }
    return ret;
}