Sound API: Add fading sounds

[dragonfireclient.git] / src / script / common / c_internal.cpp

diff --git a/src/script/common/c_internal.cpp b/src/script/common/c_internal.cpp
index b7dfb178cb736022c20ec673b0ff0fc4819a2489..b349f9dd1f7d928ebc537872380e884c4248857d 100644 (file)
--- a/src/script/common/c_internal.cpp
+++ b/src/script/common/c_internal.cpp
@@ -19,6 +19,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "common/c_internal.h"
 #include "debug.h"
+#include "log.h"
+#include "settings.h"
 
 std::string script_get_backtrace(lua_State *L)
 {
@@ -61,17 +63,65 @@ int script_exception_wrapper(lua_State *L, lua_CFunction f)
                return f(L);  // Call wrapped function and return result.
        } catch (const char *s) {  // Catch and convert exceptions.
                lua_pushstring(L, s);
-       } catch (LuaError& e) {
+       } catch (std::exception &e) {
                lua_pushstring(L, e.what());
        }
        return lua_error(L);  // Rethrow as a Lua error.
 }
 
-void script_error(lua_State *L)
+/*
+ * Note that we can't get tracebacks for LUA_ERRMEM or LUA_ERRERR (without
+ * hacking Lua internals).  For LUA_ERRMEM, this is because memory errors will
+ * not execute the the error handler, and by the time lua_pcall returns the
+ * execution stack will have already been unwound.  For LUA_ERRERR, there was
+ * another error while trying to generate a backtrace from a LUA_ERRRUN.  It is
+ * presumed there is an error with the internal Lua state and thus not possible
+ * to gather a coherent backtrace.  Realistically, the best we can do here is
+ * print which C function performed the failing pcall.
+ */
+void script_error(lua_State *L, int pcall_result, const char *mod, const char *fxn)
 {
-       const char *s = lua_tostring(L, -1);
-       std::string str(s ? s : "");
-       throw LuaError(L, str);
+       if (pcall_result == 0)
+               return;
+
+       const char *err_type;
+       switch (pcall_result) {
+       case LUA_ERRRUN:
+               err_type = "Runtime";
+               break;
+       case LUA_ERRMEM:
+               err_type = "OOM";
+               break;
+       case LUA_ERRERR:
+               err_type = "Double fault";
+               break;
+       default:
+               err_type = "Unknown";
+       }
+
+       if (!mod)
+               mod = "??";
+
+       if (!fxn)
+               fxn = "??";
+
+       const char *err_descr = lua_tostring(L, -1);
+       if (!err_descr)
+               err_descr = "<no description>";
+
+       char buf[256];
+       snprintf(buf, sizeof(buf), "%s error from mod '%s' in callback %s(): ",
+               err_type, mod, fxn);
+
+       std::string err_msg(buf);
+       err_msg += err_descr;
+
+       if (pcall_result == LUA_ERRMEM) {
+               err_msg += "\nCurrent Lua memory usage: "
+                       + itos(lua_gc(L, LUA_GCCOUNT, 0) >> 10) + " MB";
+       }
+
+       throw LuaError(err_msg);
 }
 
 // Push the list of callbacks (a lua table).
@@ -80,33 +130,63 @@ void script_error(lua_State *L)
 // - runs the callbacks
 // - replaces the table and arguments with the return value,
 //     computed depending on mode
-void script_run_callbacks(lua_State *L, int nargs, RunCallbacksMode mode)
+void script_run_callbacks_f(lua_State *L, int nargs,
+       RunCallbacksMode mode, const char *fxn)
 {
-       assert(lua_gettop(L) >= nargs + 1);
+       FATAL_ERROR_IF(lua_gettop(L) < nargs + 1, "Not enough arguments");
 
        // Insert error handler
-       lua_pushcfunction(L, script_error_handler);
-       int errorhandler = lua_gettop(L) - nargs - 1;
-       lua_insert(L, errorhandler);
+       PUSH_ERROR_HANDLER(L);
+       int error_handler = lua_gettop(L) - nargs - 1;
+       lua_insert(L, error_handler);
 
-       // Insert minetest.run_callbacks between error handler and table
-       lua_getglobal(L, "minetest");
+       // Insert run_callbacks between error handler and table
+       lua_getglobal(L, "core");
        lua_getfield(L, -1, "run_callbacks");
        lua_remove(L, -2);
-       lua_insert(L, errorhandler + 1);
+       lua_insert(L, error_handler + 1);
 
        // Insert mode after table
        lua_pushnumber(L, (int) mode);
-       lua_insert(L, errorhandler + 3);
+       lua_insert(L, error_handler + 3);
 
        // Stack now looks like this:
        // ... <error handler> <run_callbacks> <table> <mode> <arg#1> <arg#2> ... <arg#n>
 
-       if (lua_pcall(L, nargs + 2, 1, errorhandler)) {
-               script_error(L);
-       }
+       int result = lua_pcall(L, nargs + 2, 1, error_handler);
+       if (result != 0)
+               script_error(L, result, NULL, fxn);
 
-       lua_remove(L, -2); // Remove error handler
+       lua_remove(L, error_handler);
 }
 
+void log_deprecated(lua_State *L, const std::string &message)
+{
+       static bool configured = false;
+       static bool do_log     = false;
+       static bool do_error   = false;
+
+       // Only read settings on first call
+       if (!configured) {
+               std::string value = g_settings->get("deprecated_lua_api_handling");
+               if (value == "log") {
+                       do_log = true;
+               } else if (value == "error") {
+                       do_log   = true;
+                       do_error = true;
+               }
+       }
+
+       if (do_log) {
+               warningstream << message << std::endl;
+               // L can be NULL if we get called by log_deprecated(const std::string &msg)
+               // from scripting_game.cpp.
+               if (L) {
+                       if (do_error)
+                               script_error(L, LUA_ERRRUN, NULL, NULL);
+                       else
+                               infostream << script_get_backtrace(L) << std::endl;
+               }
+       }
+}