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#include <iostream>
#include <fstream>
#include <sstream>
#include "igt-shell.h"
#include "v8-helpers.h"
using namespace v8;
static const char* ToCString(const String::Utf8Value& value) {
return *value ? *value : "<invalid string>";
}
static void ReportException(Isolate* iso, TryCatch* try_catch)
{
HandleScope handle_scope(iso);
String::Utf8Value exception(iso, try_catch->Exception());
const char* exception_string = ToCString(exception);
Local<Message> message = try_catch->Message();
if (message.IsEmpty()) {
fprintf(stderr, "%s\n", exception_string);
} else {
String::Utf8Value filename(iso,
message->GetScriptOrigin().ResourceName());
Local<Context> ctx(iso->GetCurrentContext());
fprintf(stderr, "%s:%i: %s\n",
ToCString(filename),
message->GetLineNumber(ctx).FromJust(),
exception_string);
String::Utf8Value sourceline(iso,
message->GetSourceLine(ctx).ToLocalChecked());
fprintf(stderr, "%s\n", ToCString(sourceline));
int start = message->GetStartColumn(ctx).FromJust();
for (int i = 0; i < start; i++)
fprintf(stderr, " ");
int end = message->GetEndColumn(ctx).FromJust();
for (int i = start; i < end; i++)
fprintf(stderr, "^");
fprintf(stderr, "\n");
Local<Value> stack_trace_string;
if (try_catch->StackTrace(ctx).ToLocal(&stack_trace_string) &&
stack_trace_string->IsString() &&
Local<String>::Cast(stack_trace_string)->Length() > 0) {
String::Utf8Value stack_trace(iso, stack_trace_string);
fprintf(stderr, "%s\n", ToCString(stack_trace));
}
}
}
static bool ExecuteString(Isolate* iso, Local<String> source,
Local<Value> name, bool print_result,
bool report_exceptions)
{
HandleScope handle_scope(iso);
TryCatch try_catch(iso);
ScriptOrigin origin(name);
Local<Context> ctx(iso->GetCurrentContext());
Local<Script> script;
if (!Script::Compile(ctx, source, &origin).ToLocal(&script)) {
if (report_exceptions)
ReportException(iso, &try_catch);
return false;
}
Local<Value> result;
if (!script->Run(ctx).ToLocal(&result)) {
if (report_exceptions)
ReportException(iso, &try_catch);
return false;
}
if (print_result && !result->IsUndefined()) {
String::Utf8Value str(iso, result);
printf("%s\n", ToCString(str));
}
return true;
}
static void Print(const FunctionCallbackInfo<Value>& args)
{
auto iso = args.GetIsolate();
HandleScope handle_scope(iso);
for (int i = 0; i < args.Length(); i++) {
String::Utf8Value str(iso, args[i]);
printf("%s%s", i ? " " : "", ToCString(str));
}
printf("\n");
fflush(stdout);
}
static MaybeLocal<String> ReadStream(Isolate* iso, std::istream &in)
{
std::stringstream out;
out << in.rdbuf();
std::string str = out.str();
return String::NewFromUtf8(iso, str.c_str(), NewStringType::kNormal,
str.length());
}
static MaybeLocal<String> ReadFile(Isolate* iso, const char* filename)
{
std::ifstream stream(filename);
if (!stream)
iso->ThrowException(AsString(iso, "Error opening file").ToLocalChecked());
return ReadStream(iso, stream);
}
static void Read(const FunctionCallbackInfo<Value>& args)
{
auto iso = args.GetIsolate();
if (args.Length() != 1) {
iso->ThrowException(AsString(iso, "Bad parameters").ToLocalChecked());
return;
}
String::Utf8Value filename(iso, args[0]);
if (*filename == NULL) {
iso->ThrowException(AsString(iso, "Bad parameters").ToLocalChecked());
return;
}
Local<String> source;
if (!ReadFile(iso, *filename).ToLocal(&source)) {
iso->ThrowException(AsString(iso, "Error reading file").ToLocalChecked());
return;
}
args.GetReturnValue().Set(source);
}
static void Load(const FunctionCallbackInfo<Value>& args)
{
auto iso = args.GetIsolate();
for (int i = 0; i < args.Length(); i++) {
HandleScope handle_scope(iso);
String::Utf8Value filename(iso, args[i]);
if (*filename == NULL) {
iso->ThrowException(AsString(iso, "Bad parameters").ToLocalChecked());
return;
}
Local<String> source;
if (!ReadFile(iso, *filename).ToLocal(&source)) {
iso->ThrowException(AsString(iso, "Error loading file").ToLocalChecked());
return;
}
if (!ExecuteString(iso, source, args[i], false, false)) {
iso->ThrowException(AsString(iso, "Error executing file").ToLocalChecked());
return;
}
}
}
static void Quit(const FunctionCallbackInfo<Value>& args)
{
int exit_code =
args[0]->Int32Value(args.GetIsolate()->GetCurrentContext()).FromMaybe(0);
fflush(stdout);
fflush(stderr);
exit(exit_code);
}
static void igt_toy_ctor(Isolate *iso, Local<ObjectTemplate> igt)
{
HandleScope handle_scope(iso);
auto tmpl = ObjectTemplate::New(iso);
static const v8_helper_fn funcs[] = {
{ "print", Print },
{ "read", Read },
{ "load", Load },
{ "quit", Quit },
{ },
};
v8_helper_funcs(iso, tmpl, funcs);
igt->Set(iso, "toy", tmpl);
}
static struct igt_builtin igt_toy = {
.name = "toy",
.ctor = igt_toy_ctor
};
__attribute__((constructor))
void __igt_register_toy__(void)
{
igt_register_builtin(&igt_toy);
}
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