### Implement Pattern Scanner for Wesnoth

Source: https://context7.com/gamehackingacademy/patternscanner/llms.txt

Uses Windows API to enumerate processes, read module memory, and perform byte-by-byte pattern matching to locate specific opcodes.

```cpp
#include <windows.h>
#include <tlhelp32.h>
#include <stdio.h>

// Define the opcode pattern to search for (sub instruction: sub [edx+04], eax)
unsigned char bytes[] = { 0x29, 0x42, 0x04 };

int main(int argc, char** argv) {
    HANDLE process_snapshot = 0;
    HANDLE module_snapshot = 0;
    PROCESSENTRY32 pe32 = { 0 };
    MODULEENTRY32 me32;

    pe32.dwSize = sizeof(PROCESSENTRY32);
    me32.dwSize = sizeof(MODULEENTRY32);

    // Create snapshot of all running processes
    process_snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    Process32First(process_snapshot, &pe32);

    do {
        // Find the Wesnoth process
        if (wcscmp(pe32.szExeFile, L"wesnoth.exe") == 0) {
            // Create snapshot of all modules in the process
            module_snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pe32.th32ProcessID);

            // Open process handle with full access
            HANDLE process = OpenProcess(PROCESS_ALL_ACCESS, true, pe32.th32ProcessID);

            Module32First(module_snapshot, &me32);
            do {
                // Find the main executable module
                if (wcscmp(me32.szModule, L"wesnoth.exe") == 0) {
                    // Allocate buffer for module memory
                    unsigned char *buffer = (unsigned char*)calloc(1, me32.modBaseSize);
                    DWORD bytes_read = 0;

                    // Read entire module memory into buffer
                    ReadProcessMemory(process, (void*)me32.modBaseAddr, buffer, me32.modBaseSize, &bytes_read);

                    // Scan buffer for pattern matches
                    for (unsigned int i = 0; i < me32.modBaseSize - sizeof(bytes); i++) {
                        for (int j = 0; j < sizeof(bytes); j++) {
                            if (bytes[j] != buffer[i + j]) {
                                break;
                            }
                            // Pattern found - print the absolute memory address
                            if (j + 1 == sizeof(bytes)) {
                                printf("%x\n", i + (DWORD)me32.modBaseAddr);
                            }
                        }
                    }

                    free(buffer);
                    break;
                }
            } while (Module32Next(module_snapshot, &me32));

            CloseHandle(process);
            break;
        }
    } while (Process32Next(process_snapshot, &pe32));

    return 0;
}

// Expected output (example memory addresses):
// 4a2f10
// 4b8c24
// 4c1a88
```

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