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/*
* The PCI Library -- Win32 helper functions
*
* Copyright (c) 2023 Pali Rohár <pali@kernel.org>
*
* Can be freely distributed and used under the terms of the GNU GPL v2+
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <windows.h>
#include <stdio.h> /* for sprintf() */
#include "win32-helpers.h"
const char *
win32_strerror(DWORD win32_error_id)
{
/*
* Use static buffer which is large enough.
* Hopefully no Win32 API error message string is longer than 4 kB.
*/
static char buffer[4096];
DWORD len;
len = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, win32_error_id, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buffer, sizeof(buffer), NULL);
/* FormatMessage() automatically appends ".\r\n" to the error message. */
if (len && buffer[len-1] == '\n')
buffer[--len] = '\0';
if (len && buffer[len-1] == '\r')
buffer[--len] = '\0';
if (len && buffer[len-1] == '.')
buffer[--len] = '\0';
if (!len)
sprintf(buffer, "Unknown Win32 error %lu", win32_error_id);
return buffer;
}
BOOL
win32_is_non_nt_system(void)
{
OSVERSIONINFOA version;
version.dwOSVersionInfoSize = sizeof(version);
return GetVersionExA(&version) && version.dwPlatformId < VER_PLATFORM_WIN32_NT;
}
BOOL
win32_is_32bit_on_64bit_system(void)
{
BOOL (WINAPI *MyIsWow64Process)(HANDLE, PBOOL);
HMODULE kernel32;
BOOL is_wow64;
/*
* Check for 64-bit system via IsWow64Process() function exported
* from 32-bit kernel32.dll library available on the 64-bit systems.
* Resolve pointer to this function at runtime as this code path is
* primary running on 32-bit systems where are not available 64-bit
* functions.
*/
kernel32 = GetModuleHandle(TEXT("kernel32.dll"));
if (!kernel32)
return FALSE;
MyIsWow64Process = (void *)GetProcAddress(kernel32, "IsWow64Process");
if (!MyIsWow64Process)
return FALSE;
if (!MyIsWow64Process(GetCurrentProcess(), &is_wow64))
return FALSE;
return is_wow64;
}
BOOL
win32_is_32bit_on_win8_64bit_system(void)
{
#ifdef _WIN64
return FALSE;
#else
OSVERSIONINFOA version;
/* Check for Windows 8 (NT 6.2). */
version.dwOSVersionInfoSize = sizeof(version);
if (!GetVersionExA(&version) ||
version.dwPlatformId != VER_PLATFORM_WIN32_NT ||
version.dwMajorVersion < 6 ||
(version.dwMajorVersion == 6 && version.dwMinorVersion < 2))
return FALSE;
return win32_is_32bit_on_64bit_system();
#endif
}
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