singkong.c

/*
singkong.c
- Used in Singkong.jar and Java 8 bundle, for Windows.
- Author: Noprianto <nopri.anto@icloud.com>, 2020
- Website: nopri.github.io
- License: public domain
- Compile: gcc singkong.c -mwindows -Os -s -o singkong.exe
*/

#include<stdio.h>
#include<windows.h>

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
    DWORD version = 0;
    DWORD major = 0;
    DWORD minor = 0;
    DWORD build = 0;
    char versions[32];

    char error[512];
    char errors[512];

    STARTUPINFO startup_info;
    PROCESS_INFORMATION process_info;
    
    version = GetVersion();
    major = (DWORD)(LOBYTE(LOWORD(version)));
    minor = (DWORD)(HIBYTE(LOWORD(version)));
    if (version < 0x80000000) build = (DWORD)(HIWORD(version));
    sprintf(versions, "%d.%d.%d", major, minor, build);
    
    sprintf(error,  "Singkong runs wherever Java (version 5.0 or later) is available, including Windows 98 with Java 5.0. If you are using Windows and Java is not installed, this bundle might be used to run Singkong. However, this bundle was tested only on Windows 7 or later, and this system runs Windows 95/98/Me/2000/XP/Server 2003 (%s).", versions);
    sprintf(errors, "Singkong runs wherever Java (version 5.0 or later) is available, including Windows 98 with Java 5.0. If you are using Windows and Java is not installed, this bundle might be used to run Singkong. However, this bundle was tested only on Windows 7 or later, and this system runs Windows Vista (%s).", versions);

    if (major < 6) {
        MessageBox(NULL, error, "Singkong", MB_OK);
    } else {
        if (minor < 1) {
            MessageBox(NULL, errors, "Singkong", MB_OK);
        } else {            
            ZeroMemory(&startup_info, sizeof(startup_info));
            startup_info.cb = sizeof(startup_info);
            ZeroMemory(&process_info, sizeof(process_info));
            GetStartupInfo (&startup_info);
            if (CreateProcess(NULL, "jre.exe -o . -y", NULL, NULL, FALSE, 0, NULL, NULL, &startup_info, &process_info)) {
                WaitForSingleObject(process_info.hProcess, INFINITE);
            }

            ZeroMemory(&startup_info, sizeof(startup_info));
            startup_info.cb = sizeof(startup_info);
            ZeroMemory(&process_info, sizeof(process_info));
            GetStartupInfo (&startup_info);
            if (CreateProcess(NULL, "jre\\bin\\javaw.exe -jar Singkong.jar", NULL, NULL, FALSE, 0, NULL, NULL, &startup_info, &process_info)) {
                WaitForSingleObject(process_info.hProcess, INFINITE);
            }
        }
    }
    return 0;
}