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Nicer error message when loading the Universal CRT fails

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Kovid Goyal 2015-12-11 01:07:56 +05:30
parent 897a1a137e
commit 963b0eeea6
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 26 additions and 12 deletions
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38
setup/installer/windows/main.c
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@ -58,38 +58,52 @@ static ENTRYPROC load_launcher_dll() {
int i = 0;
DWORD sz = 0;
HMODULE dll = 0;
ENTRYPROC entrypoint = 0;
ENTRYPROC entrypoint = NULL;
if ((sz = GetModuleFileNameW(NULL, buf, MAX_PATH)) >= MAX_PATH - 30)
ExitProcess(show_error(L"Installation directory path too long", L"", 1));
if ((sz = GetModuleFileNameW(NULL, buf, MAX_PATH)) >= MAX_PATH - 30) {
show_error(L"Installation directory path too long", L"", 1);
return NULL;
}
while (sz > 0) {
if (buf[sz] == L'\\' || buf[sz] == L'/') break;
sz--;
}
if (sz <= 0)
ExitProcess(show_error(L"Executable path has no path separators", L"", 1));
if (sz <= 0) {
show_error(L"Executable path has no path separators", L"", 1);
return NULL;
}
buf[sz+1] = L'a'; buf[sz+2] = L'p'; buf[sz+3] = L'p'; buf[sz+4] = L'\\';
buf[sz+5] = L'D'; buf[sz+6] = L'L'; buf[sz+7] = L'L'; buf[sz+8] = L's';
buf[sz+9] = 0; buf[sz+10] = 0;
if (SetDllDirectoryW(buf) == 0) {
show_last_error(L"Failed to set DLL directory");
ExitProcess(1);
return NULL;
}
if (!LoadLibraryW(L"ucrtbase.dll")) {
show_last_error(L"Unable to find ucrtbase.dll. You should install all Windows updates on your computer to get this file.");
return NULL;
}
if (!(dll = LoadLibraryW(L"calibre-launcher.dll"))) {
show_last_error(L"Failed to load: calibre-launcher.dll");
return NULL;
}
if (!(entrypoint = (ENTRYPROC) GetProcAddress(dll, "execute_python_entrypoint"))) {
show_last_error(L"Failed to get the calibre-launcher dll entry point");
return NULL;
}
dll = LoadLibraryW(L"calibre-launcher.dll");
if (!dll) ExitProcess(show_last_error(L"Failed to get the calibre-launcher dll handle"));
entrypoint = (ENTRYPROC) GetProcAddress(dll, "execute_python_entrypoint");
if (!entrypoint) ExitProcess(show_last_error(L"Failed to get the calibre-launcher dll entry point"));
return entrypoint;
}
int __stdcall start_here() {
int ret = 0;
ENTRYPROC entrypoint = load_launcher_dll();
if (!entrypoint) return 1;
#ifdef GUI_APP
// This should really be returning the value set in the WM_QUIT message, but I cannot be bothered figuring out how to get that.
load_launcher_dll()(BASENAME, MODULE, FUNCTION, 1);
entrypoint(BASENAME, MODULE, FUNCTION, 1);
#else
ret = load_launcher_dll()(BASENAME, MODULE, FUNCTION, 0);
ret = entrypoint(BASENAME, MODULE, FUNCTION, 0);
#endif
ExitProcess(ret);
return ret;