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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
//============================================================
//
// winutil.c - Win32 OSD core utility functions
//
//============================================================
// standard windows headers
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <direct.h>
// MAME headers
#include "emu.h"
// MAMEOS headers
#include "winutil.h"
#include "strconv.h"
//============================================================
// win_error_to_file_error
//============================================================
file_error win_error_to_file_error(DWORD error)
{
file_error filerr;
// convert a Windows error to a file_error
switch (error)
{
case ERROR_SUCCESS:
filerr = FILERR_NONE;
break;
case ERROR_OUTOFMEMORY:
filerr = FILERR_OUT_OF_MEMORY;
break;
case ERROR_FILE_NOT_FOUND:
case ERROR_FILENAME_EXCED_RANGE:
case ERROR_PATH_NOT_FOUND:
filerr = FILERR_NOT_FOUND;
break;
case ERROR_ACCESS_DENIED:
filerr = FILERR_ACCESS_DENIED;
break;
case ERROR_SHARING_VIOLATION:
filerr = FILERR_ALREADY_OPEN;
break;
default:
filerr = FILERR_FAILURE;
break;
}
return filerr;
}
//============================================================
// win_attributes_to_entry_type
//============================================================
osd_dir_entry_type win_attributes_to_entry_type(DWORD attributes)
{
if (attributes == 0xFFFFFFFF)
return ENTTYPE_NONE;
else if (attributes & FILE_ATTRIBUTE_DIRECTORY)
return ENTTYPE_DIR;
else
return ENTTYPE_FILE;
}
//============================================================
// win_is_gui_application
//============================================================
BOOL win_is_gui_application(void)
{
static BOOL is_gui_frontend;
static BOOL is_first_time = TRUE;
HMODULE module;
BYTE *image_ptr;
IMAGE_DOS_HEADER *dos_header;
IMAGE_NT_HEADERS *nt_headers;
IMAGE_OPTIONAL_HEADER *opt_header;
// is this the first time we've been ran?
if (is_first_time)
{
is_first_time = FALSE;
// get the current module
module = GetModuleHandleUni();
if (!module)
return FALSE;
image_ptr = (BYTE*) module;
// access the DOS header
dos_header = (IMAGE_DOS_HEADER *) image_ptr;
if (dos_header->e_magic != IMAGE_DOS_SIGNATURE)
return FALSE;
// access the NT headers
nt_headers = (IMAGE_NT_HEADERS *) ((BYTE*)(dos_header) + (DWORD)(dos_header->e_lfanew));
if (nt_headers->Signature != IMAGE_NT_SIGNATURE)
return FALSE;
// access the optional header
opt_header = &nt_headers->OptionalHeader;
switch (opt_header->Subsystem)
{
case IMAGE_SUBSYSTEM_WINDOWS_GUI:
is_gui_frontend = TRUE;
break;
case IMAGE_SUBSYSTEM_WINDOWS_CUI:
is_gui_frontend = FALSE;
break;
}
}
return is_gui_frontend;
}
//============================================================
// osd_subst_env
//============================================================
void osd_subst_env(char **dst, const char *src)
{
TCHAR buffer[MAX_PATH];
TCHAR *t_src = tstring_from_utf8(src);
ExpandEnvironmentStrings(t_src, buffer, ARRAY_LENGTH(buffer));
*dst = utf8_from_tstring(buffer);
}
//-------------------------------------------------
// Universal way to get module handle
//-------------------------------------------------
HMODULE WINAPI GetModuleHandleUni()
{
MEMORY_BASIC_INFORMATION mbi;
VirtualQuery((LPCVOID)GetModuleHandleUni, &mbi, sizeof(mbi));
return (HMODULE)mbi.AllocationBase;
}
//-----------------------------------------------------------
// Lazy loaded function using LoadLibrary / GetProcAddress
//-----------------------------------------------------------
lazy_loaded_function::lazy_loaded_function(const char * name, const wchar_t* dll_name)
: lazy_loaded_function(name, &dll_name, 1)
{
}
lazy_loaded_function::lazy_loaded_function(const char * name, const wchar_t** dll_names, int dll_count)
: m_name(name), m_module(NULL), m_initialized(false), m_pfn(nullptr)
{
for (int i = 0; i < dll_count; i++)
m_dll_names.push_back(std::wstring(dll_names[i]));
}
lazy_loaded_function::~lazy_loaded_function()
{
if (m_module != nullptr)
{
FreeLibrary(m_module);
m_module = nullptr;
}
}
int lazy_loaded_function::initialize()
{
if (m_module == nullptr)
{
for (int i = 0; i < m_dll_names.size(); i++)
{
m_module = LoadLibraryW(m_dll_names[i].c_str());
if (m_module != NULL)
break;
}
if (m_module == NULL)
{
osd_printf_verbose("Could not find DLL to dynamically link function %s.\n", m_name.c_str());
return ERROR_DLL_NOT_FOUND;
}
}
if (m_pfn == nullptr)
{
m_pfn = GetProcAddress(m_module, m_name.c_str());
if (m_pfn == nullptr)
{
osd_printf_verbose("Could not find function address to dynamically link function %s.\n", m_name.c_str());
return ERROR_NOT_FOUND;
}
}
m_initialized = true;
return 0;
}
void lazy_loaded_function::check_init()
{
if (!m_initialized)
fatalerror("Attempt to use function pointer for function %s prior to init!", name());
}
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