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#include <windows.h>
#include "common.h"
Win32Error::Win32Error(const DWORD dwErr) : m_dwErr(dwErr) {}
Win32Error::~Win32Error()
{
if (m_szMsg)
HeapFree(GetProcessHeap(), 0, m_szMsg);
if (m_wszMsg)
HeapFree(GetProcessHeap(), 0, m_wszMsg);
}
const char* Win32Error::what() const noexcept
{
if (!m_szMsg)
FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
m_dwErr,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(char*)&m_szMsg,
0, NULL
);
return m_szMsg;
}
const TCHAR* Win32Error::twhat() const noexcept
{
#ifdef UNICODE
#define M m_wszMsg
#else
#define M m_szMsg
#endif
if (!M)
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
m_dwErr,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(TCHAR*)&M,
0, NULL
);
return M;
#undef M
}
Library::Library(const TCHAR* const tszLibrary)
{
m_hModule = LoadLibrary(tszLibrary);
if (!m_hModule)
throw Win32Error(GetLastError());
}
Library::~Library()
{
FreeLibrary(m_hModule);
}
FARPROC Library::GetProcAddress(const char* const szProc)
{
return ::GetProcAddress(m_hModule, szProc);
}
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