fix(furdb): improve program execution

furdb/include/context.hpp

@@ -13,7 +13,10 @@ struct context {
     furvm::function_h mainFunction;
 
     bool running = true;
-    bool halt    = false;
+    bool halt    = true;
+
+    void kill() const;
+    void init();
 
     void run();
 

furdb/src/command.cpp

@@ -2,6 +2,7 @@
 
 #include "furvm/executor.hpp"
 #include "furvm/function.hpp"
+#include "furvm/instruction.hpp"
 #include "furvm/module.hpp"
 #include "furvm/thing.hpp"
 
@@ -9,6 +10,7 @@
 #include <cstddef>
 #include <iostream>
 #include <random>
+#include <string>
 #include <utility>
 
 command_info command::parse(std::string_view line) {
@@ -55,6 +57,17 @@ void quit_command::execute(context& ctx, const command_info& info) {
 }
 
 void run_command::execute(context& ctx, const command_info& info) {
+    if (!ctx.executor->done()) {
+        std::cout << "A program is currently running, do you want to kill it? (y/N) ";
+        std::string answer;
+        if (!std::getline(std::cin, answer)) {
+            ctx.running = false;
+            return;
+        }
+        if (answer != "y" && answer != "Y" && answer != "yes") return;
+        ctx.kill();
+    }
+    std::cout << "Running the program\n";
     ctx.run();
 }
 

furdb/src/context.cpp

@@ -5,14 +5,27 @@
 #include <iostream>
 #include <stdexcept>
 
+void context::kill() const {
+    while (!executor->done())
+        executor->pop_frame();
+}
+
+void context::init() {
+    kill();
+    executor->push_frame(mod, *mainFunction);
+    executor->clear_flags();
+}
+
 void context::run() {
-    if ((executor->flags() & furvm::executor_flags::Done) != furvm::executor_flags::Done)
-        executor->push_frame(mod, *mainFunction);
-    while ((executor->flags() & furvm::executor_flags::Done) != furvm::executor_flags::Done && !halt) {
+    if (executor->done()) init();
+    executor->unsuspend();
+
+    halt = false;
+    while (!executor->done() && !halt)
         executor->step();
-    }
-    if ((executor->flags() & furvm::executor_flags::Done) == furvm::executor_flags::Done) {
+    if (executor->done()) {
         std::cout << "Execution finished\n";
+        halt = true;
     }
 }