refactor BASIC interpreter code

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

libs/basic/CMakeLists.txt

@@ -4,15 +4,15 @@ SPDX-FileCopyrightText: 2021 Avinal Kumar <avinal.xlvii@gmail.com>
 #]=======================================================================]
 
 cmake_minimum_required(VERSION 3.16)
-project(basic LANGUAGES C CXX)
+project(basic LANGUAGES C)
 
 file(GLOB BASIC_SRC src/*.c)
 add_library(basic "")
 target_sources(basic PRIVATE ${BASIC_SRC})
 target_include_directories(basic PRIVATE include/basic)
 
-add_executable(basic_exec main.cc)
-target_include_directories(basic_exec PRIVATE include/basic include)
-target_link_libraries(basic_exec PRIVATE basic)
+#add_executable(basic_exec main.cc)
+#target_include_directories(basic_exec PRIVATE include/basic)
+#target_link_libraries(basic_exec PRIVATE basic)
 
 

libs/basic/include/basic.hpp

@@ -1,60 +0,0 @@
-/**
- * SPDX-License-Identifier: Apache-2.0
- * SPDX-FileCopyrightText: 2021 Avinal Kumar <avinal.xlvii@gmail.com>
- *
- * @file	basic.hpp
- * @brief	Wrapper around basic
- */
-
-#ifndef BASIC_BASIC_HPP_
-#define BASIC_BASIC_HPP_
-
-#include <string>
-extern "C" {
-#include "basic/parser.h"
-}
-
-class basic {
-private:
-  std::string last_error = "";
-  static std::string output;
-  static int out(int ch) {
-    output.push_back(ch);
-    return 1;
-  }
-
-  static int in() { return getchar(); }
-
-public:
-  basic();
-  ~basic();
-  bool evaluate_line(const std::string& line);
-  std::string run();
-  std::string get_error();
-};
-
-std::string basic::output = "";
-
-basic::basic() {
-  basic_init(1024 * 8, 2048);
-  basic_register_io(out, in);
-}
-
-basic::~basic() { basic_destroy(); }
-
-bool basic::evaluate_line(const std::string& line) {
-  char* input = const_cast<char*>(line.c_str());
-  basic_eval(input);
-  if (evaluate_last_error()) {
-    last_error.append(evaluate_last_error());
-    clear_last_error();
-    return false;
-  }
-  return true;
-}
-
-std::string basic::get_error() { return last_error; }
-
-std::string basic::run() { return output; }
-
-#endif  // BASIC_BASIC_HPP_

libs/basic/include/basic/basic.hpp

@@ -0,0 +1,57 @@
+/**
+ * SPDX-License-Identifier: Apache-2.0
+ * SPDX-FileCopyrightText: 2021 Avinal Kumar <avinal.xlvii@gmail.com>
+ *
+ * @file	basic.hpp
+ * @brief	Wrapper around basic
+ */
+
+#ifndef BASIC_BASIC_HPP_
+#define BASIC_BASIC_HPP_
+
+#include <string>
+extern "C" {
+#include "parser.h"
+}
+
+class basic {
+private:
+  std::string last_error = "";
+  static std::string output;
+  static int out(int ch) {
+    output.push_back(ch);
+    return 1;
+  }
+
+  static int in() { return getchar(); }
+
+public:
+  basic() {
+    basic_init(1024 * 8, 2048);
+    basic_register_io(out, in);
+  }
+
+  ~basic() { basic_destroy(); }
+
+  bool evaluate_line(const std::string& line) {
+    char* input = const_cast<char*>(line.c_str());
+    basic_eval(input);
+    if (evaluate_last_error()) {
+      last_error.append(evaluate_last_error());
+      clear_last_error();
+      return false;
+    }
+    return true;
+  }
+
+  std::string get_error() { return last_error; }
+
+  std::string run() {
+    evaluate_line("RUN");
+    return output;
+  }
+
+  void clear_output() { output = ""; }
+};
+
+#endif  // BASIC_BASIC_HPP_

libs/basic/include/basic/parser.h

@@ -8,9 +8,9 @@
 #ifndef BASIC_PARSER_H_
 #define BASIC_PARSER_H_
 
-#include <io.h>
+#include "io.h"
 #include <stdbool.h>
-#include <tokenizer.h>
+#include "tokenizer.h"
 
 float evaluate(char* expression_string);