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fortran_kernel.cpp
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440 lines (398 loc) · 15.8 KB
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#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#ifdef _WIN32
# include <io.h>
# define fileno _fileno
# define dup _dup
# define dup2 _dup2
# define close _close
# include <fcntl.h>
#else
# include <unistd.h>
#endif
#include <xeus/xinterpreter.hpp>
#include <xeus/xkernel.hpp>
#include <xeus/xkernel_configuration.hpp>
#include <nlohmann/json.hpp>
#include <lpython/fortran_kernel.h>
#include <lpython/parser/parser.h>
#include <lpython/semantics/ast_to_asr.h>
#include <libasr/codegen/asr_to_llvm.h>
#include <lpython/fortran_evaluator.h>
#include <libasr/asr_utils.h>
#include <libasr/string_utils.h>
namespace nl = nlohmann;
namespace LFortran
{
class RedirectStdout
{
public:
RedirectStdout(std::string &out) : _out{out} {
stdout_fileno = fileno(stdout);
std::cout << std::flush;
fflush(stdout);
saved_stdout = dup(stdout_fileno);
#ifdef _WIN32
if (_pipe(out_pipe, 65536, O_BINARY) != 0) {
#else
if (pipe(out_pipe) != 0) {
#endif
throw LFortranException("pipe() failed");
}
dup2(out_pipe[1], stdout_fileno);
close(out_pipe[1]);
printf("X");
}
~RedirectStdout() {
fflush(stdout);
read(out_pipe[0], buffer, MAX_LEN);
dup2(saved_stdout, stdout_fileno);
_out = std::string(&buffer[1]);
}
private:
std::string &_out;
static const size_t MAX_LEN=1024;
char buffer[MAX_LEN+1] = {0};
int out_pipe[2];
int saved_stdout;
int stdout_fileno;
};
class custom_interpreter : public xeus::xinterpreter
{
private:
FortranEvaluator e;
public:
custom_interpreter() : e{CompilerOptions()} {}
virtual ~custom_interpreter() = default;
private:
void configure_impl() override;
nl::json execute_request_impl(int execution_counter,
const std::string& code,
bool silent,
bool store_history,
nl::json user_expressions,
bool allow_stdin) override;
nl::json complete_request_impl(const std::string& code,
int cursor_pos) override;
nl::json inspect_request_impl(const std::string& code,
int cursor_pos,
int detail_level) override;
nl::json is_complete_request_impl(const std::string& code) override;
nl::json kernel_info_request_impl() override;
void shutdown_request_impl() override;
};
nl::json custom_interpreter::execute_request_impl(int execution_counter, // Typically the cell number
const std::string& code, // Code to execute
bool /*silent*/,
bool /*store_history*/,
nl::json /*user_expressions*/,
bool /*allow_stdin*/)
{
FortranEvaluator::EvalResult r;
std::string std_out;
std::string code0;
CompilerOptions cu;
try {
if (startswith(code, "%%showast")) {
code0 = code.substr(code.find("\n")+1);
LocationManager lm;
diag::Diagnostics diagnostics;
Result<std::string>
res = e.get_ast(code0, lm, diagnostics);
nl::json result;
if (res.ok) {
publish_stream("stdout", res.result);
result["status"] = "ok";
result["payload"] = nl::json::array();
result["user_expressions"] = nl::json::object();
} else {
std::string msg = diagnostics.render(code0, lm, cu);
publish_stream("stderr", msg);
result["status"] = "error";
result["ename"] = "CompilerError";
result["evalue"] = msg;
result["traceback"] = nl::json::array();
}
return result;
}
if (startswith(code, "%%showasr")) {
code0 = code.substr(code.find("\n")+1);
LocationManager lm;
diag::Diagnostics diagnostics;
Result<std::string>
res = e.get_asr(code0, lm, diagnostics);
nl::json result;
if (res.ok) {
publish_stream("stdout", res.result);
result["status"] = "ok";
result["payload"] = nl::json::array();
result["user_expressions"] = nl::json::object();
} else {
std::string msg = diagnostics.render(code0, lm, cu);
publish_stream("stderr", msg);
result["status"] = "error";
result["ename"] = "CompilerError";
result["evalue"] = msg;
result["traceback"] = nl::json::array();
}
return result;
}
if (startswith(code, "%%showllvm")) {
code0 = code.substr(code.find("\n")+1);
LocationManager lm;
diag::Diagnostics diagnostics;
Result<std::string>
res = e.get_llvm(code0, lm, diagnostics);
nl::json result;
if (res.ok) {
publish_stream("stdout", res.result);
result["status"] = "ok";
result["payload"] = nl::json::array();
result["user_expressions"] = nl::json::object();
} else {
std::string msg = diagnostics.render(code0, lm, cu);
publish_stream("stderr", msg);
result["status"] = "error";
result["ename"] = "CompilerError";
result["evalue"] = msg;
result["traceback"] = nl::json::array();
}
return result;
}
if (startswith(code, "%%showasm")) {
code0 = code.substr(code.find("\n")+1);
LocationManager lm;
diag::Diagnostics diagnostics;
Result<std::string>
res = e.get_asm(code0, lm, diagnostics);
nl::json result;
if (res.ok) {
publish_stream("stdout", res.result);
result["status"] = "ok";
result["payload"] = nl::json::array();
result["user_expressions"] = nl::json::object();
} else {
std::string msg = diagnostics.render(code0, lm, cu);
publish_stream("stderr", msg);
result["status"] = "error";
result["ename"] = "CompilerError";
result["evalue"] = msg;
result["traceback"] = nl::json::array();
}
return result;
}
if (startswith(code, "%%showcpp")) {
code0 = code.substr(code.find("\n")+1);
LocationManager lm;
diag::Diagnostics diagnostics;
Result<std::string>
res = e.get_cpp(code0, lm, diagnostics);
nl::json result;
if (res.ok) {
publish_stream("stdout", res.result);
result["status"] = "ok";
result["payload"] = nl::json::array();
result["user_expressions"] = nl::json::object();
} else {
std::string msg = diagnostics.render(code0, lm, cu);
publish_stream("stderr", msg);
result["status"] = "error";
result["ename"] = "CompilerError";
result["evalue"] = msg;
result["traceback"] = nl::json::array();
}
return result;
}
if (startswith(code, "%%showfmt")) {
code0 = code.substr(code.find("\n")+1);
LocationManager lm;
diag::Diagnostics diagnostics;
Result<std::string>
res = e.get_fmt(code0, lm, diagnostics);
nl::json result;
if (res.ok) {
publish_stream("stdout", res.result);
result["status"] = "ok";
result["payload"] = nl::json::array();
result["user_expressions"] = nl::json::object();
} else {
std::string msg = diagnostics.render(code0, lm, cu);
publish_stream("stderr", msg);
result["status"] = "error";
result["ename"] = "CompilerError";
result["evalue"] = msg;
result["traceback"] = nl::json::array();
}
return result;
}
RedirectStdout s(std_out);
code0 = code;
LocationManager lm;
diag::Diagnostics diagnostics;
Result<FortranEvaluator::EvalResult>
res = e.evaluate(code0, false, lm, diagnostics);
if (res.ok) {
r = res.result;
} else {
std::string msg = diagnostics.render(code0, lm, cu);
publish_stream("stderr", msg);
nl::json result;
result["status"] = "error";
result["ename"] = "CompilerError";
result["evalue"] = msg;
result["traceback"] = nl::json::array();
return result;
}
} catch (const LFortranException &e) {
publish_stream("stderr", "LFortran Exception: " + e.msg());
nl::json result;
result["status"] = "error";
result["ename"] = "LFortranException";
result["evalue"] = e.msg();
result["traceback"] = nl::json::array();
return result;
}
if (std_out.size() > 0) {
publish_stream("stdout", std_out);
}
switch (r.type) {
case (LFortran::FortranEvaluator::EvalResult::integer4) : {
nl::json pub_data;
pub_data["text/plain"] = std::to_string(r.i32);
publish_execution_result(execution_counter, std::move(pub_data), nl::json::object());
break;
}
case (LFortran::FortranEvaluator::EvalResult::integer8) : {
nl::json pub_data;
pub_data["text/plain"] = std::to_string(r.i64);
publish_execution_result(execution_counter, std::move(pub_data), nl::json::object());
break;
}
case (LFortran::FortranEvaluator::EvalResult::real4) : {
nl::json pub_data;
pub_data["text/plain"] = std::to_string(r.f32);
publish_execution_result(execution_counter, std::move(pub_data), nl::json::object());
break;
}
case (LFortran::FortranEvaluator::EvalResult::real8) : {
nl::json pub_data;
pub_data["text/plain"] = std::to_string(r.f64);
publish_execution_result(execution_counter, std::move(pub_data), nl::json::object());
break;
}
case (LFortran::FortranEvaluator::EvalResult::complex4) : {
nl::json pub_data;
pub_data["text/plain"] = "(" + std::to_string(r.c32.re) + ", " + std::to_string(r.c32.im) + ")";
publish_execution_result(execution_counter, std::move(pub_data), nl::json::object());
break;
}
case (LFortran::FortranEvaluator::EvalResult::complex8) : {
nl::json pub_data;
pub_data["text/plain"] = "(" + std::to_string(r.c64.re) + ", " + std::to_string(r.c64.im) + ")";
publish_execution_result(execution_counter, std::move(pub_data), nl::json::object());
break;
}
case (LFortran::FortranEvaluator::EvalResult::statement) : {
break;
}
case (LFortran::FortranEvaluator::EvalResult::none) : {
break;
}
default : throw LFortranException("Return type not supported");
}
nl::json result;
result["status"] = "ok";
result["payload"] = nl::json::array();
result["user_expressions"] = nl::json::object();
return result;
}
void custom_interpreter::configure_impl()
{
// Perform some operations
}
nl::json custom_interpreter::complete_request_impl(const std::string& code,
int cursor_pos)
{
nl::json result;
// Code starts with 'H', it could be the following completion
if (code[0] == 'H')
{
result["status"] = "ok";
result["matches"] = {"Hello", "Hey", "Howdy"};
result["cursor_start"] = 5;
result["cursor_end"] = cursor_pos;
}
// No completion result
else
{
result["status"] = "ok";
result["matches"] = nl::json::array();
result["cursor_start"] = cursor_pos;
result["cursor_end"] = cursor_pos;
}
return result;
}
nl::json custom_interpreter::inspect_request_impl(const std::string& code,
int /*cursor_pos*/,
int /*detail_level*/)
{
nl::json result;
if (code.compare("print") == 0)
{
result["found"] = true;
result["text/plain"] = "Print objects to the text stream file, [...]";
}
else
{
result["found"] = false;
}
result["status"] = "ok";
return result;
}
nl::json custom_interpreter::is_complete_request_impl(const std::string& /*code*/)
{
nl::json result;
// if (is_complete(code))
// {
result["status"] = "complete";
// }
// else
// {
// result["status"] = "incomplete";
// result["indent"] = 4;
//}
return result;
}
nl::json custom_interpreter::kernel_info_request_impl()
{
nl::json result;
std::string version = LFORTRAN_VERSION;
std::string banner = ""
"LFortran " + version + "\n"
"Jupyter kernel for Fortran";
result["banner"] = banner;
result["implementation"] = "LFortran";
result["implementation_version"] = version;
result["language_info"]["name"] = "fortran";
result["language_info"]["version"] = "2018";
result["language_info"]["mimetype"] = "text/x-fortran";
result["language_info"]["file_extension"] = ".f90";
return result;
}
void custom_interpreter::shutdown_request_impl() {
std::cout << "Bye!!" << std::endl;
}
int run_kernel(const std::string &connection_filename)
{
// Load configuration file
xeus::xconfiguration config = xeus::load_configuration(connection_filename);
// Create interpreter instance
using interpreter_ptr = std::unique_ptr<custom_interpreter>;
interpreter_ptr interpreter = interpreter_ptr(new custom_interpreter());
// Create kernel instance and start it
xeus::xkernel kernel(config, xeus::get_user_name(), std::move(interpreter));
kernel.start();
return 0;
}
}