void CmdBase::PrintUsage(const Args& args, Str::StringRef syntax, Str::StringRef description) const {
if(description.empty()) {
Print("%s: %s %s", _("usage"), args.Argv(0).c_str(), syntax.c_str());
} else {
Print("%s: %s %s — %s", _("usage"), args.Argv(0).c_str(), syntax.c_str(), description.c_str());
}
}
//TODO: error handling?
int VMBase::Create(Str::StringRef name, Type type)
{
if (module) {
Com_Printf(S_ERROR "Attempting to re-create an already-loaded VM");
return -1;
}
const std::string& libPath = FS::GetLibPath();
bool debug = Cvar_Get("vm_debug", "0", CVAR_INIT)->integer;
if (type == TYPE_NATIVE) {
std::string exe = FS::Path::Build(libPath, name + EXE_EXT);
Com_Printf("Trying to load native module %s\n", exe.c_str());
module = NaCl::LoadModule(exe.c_str(), nullptr, debug);
} else if (type == TYPE_NACL) {
// Extract the nexe from the pak so that sel_ldr can load it
std::string nexe = name + "-" ARCH_STRING ".nexe";
try {
FS::File out = FS::HomePath::OpenWrite(nexe);
FS::PakPath::CopyFile(nexe, out);
out.Close();
} catch (std::system_error& err) {
Com_Printf(S_ERROR "Failed to extract NaCl module %s: %s\n", nexe.c_str(), err.what());
return -1;
}
std::string sel_ldr = FS::Path::Build(libPath, "sel_ldr" EXE_EXT);
std::string irt = FS::Path::Build(libPath, "irt_core-" ARCH_STRING ".nexe");
#ifdef __linux__
std::string bootstrap = FS::Path::Build(libPath, "nacl_helper_bootstrap");
NaCl::LoaderParams params = {sel_ldr.c_str(), irt.c_str(), bootstrap.c_str()};
#else
NaCl::LoaderParams params = {sel_ldr.c_str(), irt.c_str(), nullptr};
#endif
Com_Printf("Trying to load NaCl module %s\n", nexe.c_str());
module = NaCl::LoadModule(FS::Path::Build(FS::GetHomePath(), nexe).c_str(), ¶ms, debug);
} else {
Com_Printf(S_ERROR "Invalid VM type");
return -1;
}
if (!module) {
Com_Printf(S_ERROR "Couldn't load VM %s", name.c_str());
return -1;
}
if (debug)
Com_Printf("Waiting for GDB connection on localhost:4014\n");
// Read the ABI version from the root socket.
// If this fails, we assume the remote process failed to start
std::vector<char> buffer;
if (!module.GetRootSocket().RecvMsg(buffer) || buffer.size() != sizeof(int)) {
Com_Printf(S_ERROR "The '%s' VM did not start.", name.c_str());
return -1;
}
Com_Printf("Loaded module with the NaCl ABI");
return *reinterpret_cast<int*>(buffer.data());
}
intptr_t DynamicLib::InternalLoadSym(Str::StringRef sym,
std::string& errorString) {
#ifdef _WIN32
intptr_t p = reinterpret_cast<intptr_t>(
GetProcAddress(static_cast<HMODULE>(handle), sym.c_str()));
if (!p)
errorString = Win32StrError(GetLastError());
return p;
#else
intptr_t p = reinterpret_cast<intptr_t>(dlsym(handle, sym.c_str()));
if (!p)
errorString = dlerror();
return p;
#endif
}
bool ParseCvarValue(Str::StringRef value, std::size_t& result) {
if ( value.empty() || !Str::cisdigit(value[0]) )
{
return false;
}
result = std::stoul(value);
return true;
}
void Rocket_AddConsoleText(Str::StringRef text)
{
// HACK: Ugly way to force pre-engine-upgrade behavior. TODO: Make it work without this hack
static char buffer[ MAX_STRING_CHARS ];
Q_strncpyz( buffer, text.c_str(), sizeof(buffer) );
if ( !Q_stricmp( "\n", buffer ) )
{
return;
}
RocketConsoleTextElement::lines.push_front( ConsoleLine( Rocket::Core::String( va( "%s\n", buffer ) ) ) );
}
Args::Args(Str::StringRef cmd) {
const char* in = cmd.begin();
//Skip leading whitespace
SkipSpaces(in, cmd.end());
//Return if the cmd is empty
if (in == cmd.end())
return;
//Build arg tokens
std::string currentToken;
while (true) {
//Check for end of current token
if (SkipSpaces(in, cmd.end())) {
args.push_back(std::move(currentToken));
if (in == cmd.end())
return;
currentToken.clear();
}
//Handle quoted strings
if (in[0] == '\"') {
in++;
//Read all characters until quote end
while (in != cmd.end()) {
if (in[0] == '\"') {
in++;
break;
} else if (in + 1 != cmd.end() && in[0] == '\\') {
currentToken.push_back(in[1]);
in += 2;
} else {
currentToken.push_back(in[0]);
in++;
}
}
} else {
if (in + 1 != cmd.end() && in[0] == '\\') {
currentToken.push_back(in[1]);
in += 2;
} else {
currentToken.push_back(in[0]);
in++;
}
}
}
}
DynamicLib DynamicLib::Open(Str::StringRef filename, std::string& errorString) {
#ifdef _WIN32
void* handle = LoadLibraryW(Str::UTF8To16(filename).c_str());
if (!handle)
errorString = Win32StrError(GetLastError());
#else
// Handle relative paths correctly
const char* dlopenFilename = filename.c_str();
std::string relativePath;
if (filename.find('/') == std::string::npos) {
relativePath = "./" + filename;
dlopenFilename = relativePath.c_str();
}
void* handle = dlopen(dlopenFilename, RTLD_NOW);
if (!handle)
errorString = dlerror();
#endif
DynamicLib out;
out.handle = handle;
return out;
}
void Drop(Str::StringRef message) {
// Transform into a fatal error if too many errors are generated in quick
// succession.
static Sys::SteadyClock::time_point lastError;
Sys::SteadyClock::time_point now = Sys::SteadyClock::now();
static int errorCount = 0;
if (now - lastError < std::chrono::milliseconds(100)) {
if (++errorCount > 3)
Sys::Error(message);
} else
errorCount = 0;
lastError = now;
throw DropErr(message.c_str());
}
void Field::RunCommand(Str::StringRef defaultCommand) {
if (GetText().empty()) {
return;
}
std::string current = Str::UTF32To8(GetText());
if (current[0] == '/' or current[0] == '\\') {
Cmd::BufferCommandText(current.c_str() + 1, true);
} else if (defaultCommand.empty()) {
Cmd::BufferCommandText(current, true);
} else {
Cmd::BufferCommandText(defaultCommand + " " + Cmd::Escape(current), true);
}
AddToHistory(hist, std::move(current));
Clear();
}
std::string Escape(Str::StringRef text) {
if (text.empty()) {
return "\"\"";
}
bool escaped = false;
bool maybeComment = false;
std::string res = "\"";
for (char c: text) {
if (c == '\\') {
res.append("\\\\");
} else if (c == '\"') {
res.append("\\\"");
} else if (c == '$') {
res.append("\\$");
} else {
if (Str::cisspace(c) || c == ';') {
escaped = true;
}
res.push_back(c);
}
if (maybeComment && (c == '/' || c == '*')) {
escaped = true;
maybeComment = false;
} else if (c == '/') {
maybeComment = true;
} else {
maybeComment = false;
}
}
if (escaped) {
res += "\"";
} else {
res.erase(0, 1);
}
return res;
}
