Add a basic debug info command

Author: sourrust

src/commands/debugger.c

@@ -0,0 +1,24 @@
+#include "debugger.h"
+
+#include <stdio.h>
+#include <lua.h>
+
+#include "laco.h"
+
+void laco_print_debug_info(struct LacoState* laco,
+                           const char* function_name) {
+  lua_State* L = laco_get_laco_lua_state(laco);
+  lua_Debug debug_info = {0};
+
+  lua_getfield(L, LUA_GLOBALSINDEX, function_name);
+
+  lua_getinfo(L, ">Sl", &debug_info);
+
+  printf(
+    "What:            \t%s\n"
+    "Source file:     \t%s\n"
+    "Line defined on: \t%d\n"
+    "Current line:    \t%d\n",
+    debug_info.what, debug_info.source,
+    debug_info.linedefined, debug_info.currentline);
+}

src/commands/debugger.h

@@ -0,0 +1,9 @@
+#ifndef LACO_DEBUGGER_H
+#define LACO_DEBUGGER_H
+
+struct LacoState;
+
+void laco_print_debug_info(struct LacoState* laco,
+                           const char* function_name);
+
+#endif /* LACO_DEBUGGER_H */