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#include <exception>
#include <windows.h>
#include <wininet.h>
#include <libxml/xmlerror.h>
#include "err.h"
#include "util.h"
#include "win32.h"
/* Strip trailing punctuation. */
static void Strip(wchar_t* s, DWORD* len)
{
int i;
for (i = *len-1; i >= 0; i--)
if (s[i] == '\r' || s[i] == '\n' || s[i] == '.')
s[i] = 0;
*len = i+1;
}
Err::Err(ErrType t, Buf<const wchar_t> msg)
{
const wchar_t fmt[] = L"%s: %s.";
switch (t) {
case GENERIC:
what = std::wstring(Len(msg)+2, 0);
Swprintf(what, L"%s.", msg.data);
break;
case WINDOWS:
{
wchar_t* err;
DWORD lenErr = FormatMessageW(
FORMAT_MESSAGE_ALLOCATE_BUFFER
|FORMAT_MESSAGE_FROM_SYSTEM
|FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr,
GetLastError(),
MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
(wchar_t*)&err,
0, nullptr);
Strip(err, &lenErr);
what = std::wstring(Len(fmt)+Len(msg)+lenErr, 0);
Swprintf(what, fmt, msg.data, err);
HeapFree(GetProcessHeap(), 0, err);
break;
}
case WININET:
{
DWORD code = GetLastError();
if (code == ERROR_INTERNET_EXTENDED_ERROR) {
DWORD lenErr;
InternetGetLastResponseInfo(&code, nullptr, &lenErr);
std::wstring err(lenErr, 0);
if (InternetGetLastResponseInfoW(&code, err.data(), &lenErr)) {
Strip(err.data(), &lenErr);
what = std::wstring(Len(fmt)+Len(msg)+lenErr, 0);
Swprintf(what, fmt, msg.data, err.c_str());
} else
what = Err(WINDOWS, msg).what;
} else {
wchar_t* err;
DWORD lenErr = FormatMessageW(
FORMAT_MESSAGE_ALLOCATE_BUFFER
|FORMAT_MESSAGE_FROM_SYSTEM
|FORMAT_MESSAGE_FROM_HMODULE
|FORMAT_MESSAGE_IGNORE_INSERTS,
GetModuleHandle(L"wininet.dll"),
code,
MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
(wchar_t*)&err,
0, nullptr);
Strip(err, &lenErr);
what = std::wstring(Len(fmt)+Len(msg)+lenErr, 0);
Swprintf(what, fmt, msg.data, err);
HeapFree(GetProcessHeap(), 0, err);
}
break;
}
case LIBXML2:
{
std::wstring err = WideFromNarrow(xmlGetLastError()->message);
what = std::wstring(Len(fmt)+Len(msg)+err.size(), 0);
Swprintf(what, fmt, msg.data, err.c_str());
break;
}
}
}
std::wstring What(std::exception_ptr ex)
{
try {
std::rethrow_exception(ex);
} catch (const Err& e) {
return e.what;
} catch (const std::exception& e) {
return WideFromNarrow(e.what());
} catch (...) {
return L"Unknown exception";
}
}
void OnTerminate()
{
EBMessageBox(What(), L"Fatal Error", MB_ICONERROR);
}
|