#include "macros.h"
#include <psapi.h>
#include <tlhelp32.h>

IMPLEMENT_THUNK( psapi, WINDOWS, DWORD, WINAPI, GetModuleFileNameExA, (HANDLE hProcess, HMODULE hModule, LPSTR lpFileName, DWORD nSize ) )
{
    DWORD   dwProcessId = 0;
    DWORD   dwResult = 0;

    if ( !hProcess || hProcess == GetCurrentProcess() || GetCurrentProcessId() == (dwProcessId = GetProcessId( hProcess )) )
        return GetModuleFileNameA( hModule, lpFileName, nSize );

    HANDLE  hSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPMODULE, dwProcessId );

    if ( IsValidHandle( hSnapshot ) )
    {
        MODULEENTRY32   me;

        me.dwSize = sizeof(me);
        if ( Module32First( hSnapshot, &me ) )
        {
            BOOL    fFound = FALSE;

            if ( NULL == hModule )
                fFound = TRUE;
            else do
            {
                fFound = (me.hModule == hModule);
            } while ( !fFound && Module32Next( hSnapshot, &me ) );

            if ( fFound )
            {
                dwResult = _tcslen( me.szExePath );

                if ( dwResult > nSize && nSize > 0 )
                    lpFileName[nSize -1] = 0;

                _tcsncpy( lpFileName, me.szExePath, nSize );
            }
        }

        CloseHandle( hSnapshot );
    }

    return dwResult;
}