mkxp-freebird/binding-mruby/binding-mruby.cpp

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/*
** binding-mruby.cpp
**
** This file is part of mkxp.
**
** Copyright (C) 2013 Jonas Kulla <Nyocurio@gmail.com>
**
** mkxp is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 2 of the License, or
** (at your option) any later version.
**
** mkxp is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
*/
#include "binding.h"
#include <mruby.h>
#include <mruby/string.h>
#include <mruby/array.h>
#include <mruby/class.h>
#include <mruby/irep.h>
#include <mruby/compile.h>
#include <mruby/proc.h>
#include <mruby/dump.h>
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#include <stdio.h>
#include <zlib.h>
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#include <string>
#include <SDL_messagebox.h>
#include <SDL_rwops.h>
#include <SDL_timer.h>
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#include "sharedstate.h"
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#include "texpool.h"
#include "eventthread.h"
#include "filesystem.h"
#include "exception.h"
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#include "binding-util.h"
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#include "binding-types.h"
#include "mrb-ext/marshal.h"
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static void mrbBindingExecute();
static void mrbBindingTerminate();
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ScriptBinding scriptBindingImpl =
{
mrbBindingExecute,
mrbBindingTerminate
};
ScriptBinding *scriptBinding = &scriptBindingImpl;
void fileBindingInit(mrb_state *);
void timeBindingInit(mrb_state *);
void marshalBindingInit(mrb_state *);
void kernelBindingInit(mrb_state *);
void tableBindingInit(mrb_state *);
void etcBindingInit(mrb_state *);
void fontBindingInit(mrb_state *);
void bitmapBindingInit(mrb_state *);
void spriteBindingInit(mrb_state *);
void planeBindingInit(mrb_state *);
void viewportBindingInit(mrb_state *);
void windowBindingInit(mrb_state *);
void tilemapBindingInit(mrb_state *);
void inputBindingInit(mrb_state *);
void audioBindingInit(mrb_state *);
void graphicsBindingInit(mrb_state *);
/* From module_rpg.c */
extern const uint8_t mrbModuleRPG[];
static void mrbBindingInit(mrb_state *mrb)
{
int arena = mrb_gc_arena_save(mrb);
/* Init standard classes */
fileBindingInit(mrb);
timeBindingInit(mrb);
marshalBindingInit(mrb);
kernelBindingInit(mrb);
/* Init RGSS classes */
tableBindingInit(mrb);
etcBindingInit(mrb);
fontBindingInit(mrb);
bitmapBindingInit(mrb);
spriteBindingInit(mrb);
planeBindingInit(mrb);
viewportBindingInit(mrb);
windowBindingInit(mrb);
tilemapBindingInit(mrb);
/* Init RGSS modules */
inputBindingInit(mrb);
audioBindingInit(mrb);
graphicsBindingInit(mrb);
/* Load RPG module */
mrb_load_irep(mrb, mrbModuleRPG);
mrb_define_global_const(mrb, "MKXP", mrb_true_value());
mrb_gc_arena_restore(mrb, arena);
}
static mrb_value
mkxpTimeOp(mrb_state *mrb, mrb_value)
{
mrb_int iterations = 1;
const char *opName = "";
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mrb_value block;
mrb_get_args(mrb, "|iz&", &iterations, &opName, &block);
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Uint64 start = SDL_GetPerformanceCounter();
for (int i = 0; i < iterations; ++i)
mrb_yield(mrb, block, mrb_nil_value());
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Uint64 diff = SDL_GetPerformanceCounter() - start;
double avg = (double) diff / iterations;
double sec = avg / SDL_GetPerformanceFrequency();
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float ms = sec * 1000;
printf("<%s> [%f ms]\n", opName, ms);
fflush(stdout);
return mrb__float_value(ms);
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}
static const char *
mrbValueString(mrb_value value)
{
return mrb_string_p(value) ? RSTRING_PTR(value) : 0;
}
static void
showExcMessageBox(mrb_state *mrb, mrb_value exc)
{
/* Display actual exception in a message box */
mrb_value mesg = mrb_funcall(mrb, exc, "message", 0);
mrb_value line = mrb_attr_get(mrb, exc, mrb_intern_lit(mrb, "line"));
mrb_value file = mrb_attr_get(mrb, exc, mrb_intern_lit(mrb, "file"));
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const char *excClass = mrb_class_name(mrb, mrb_class(mrb, exc));
char msgBoxText[512];
snprintf(msgBoxText, 512, "Script '%s' line %d: %s occured.\n\n%s",
mrbValueString(file), mrb_fixnum(line), excClass, mrbValueString(mesg));
shState->eThread().showMessageBox(msgBoxText, SDL_MESSAGEBOX_ERROR);
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}
static void
checkException(mrb_state *mrb)
{
if (!mrb->exc)
return;
mrb_value exc = mrb_obj_value(mrb->exc);
MrbData &mrbData = *getMrbData(mrb);
/* Check if an actual exception occured, or just a shutdown was called */
if (mrb_obj_class(mrb, exc) != mrbData.exc[Shutdown])
showExcMessageBox(mrb, exc);
}
static void
showError(const std::string &msg)
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{
shState->eThread().showMessageBox(msg.c_str());
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}
static void
runCustomScript(mrb_state *mrb, mrbc_context *ctx, const char *filename)
{
/* Execute custom script */
FILE *f = fopen(filename, "r");
if (!f)
{
static char buffer[256];
snprintf(buffer, sizeof(buffer), "Unable to open script '%s'", filename);
showError(buffer);
return;
}
ctx->filename = strdup(filename);
ctx->lineno = 1;
/* Run code */
mrb_load_file_cxt(mrb, f, ctx);
free(ctx->filename);
fclose(f);
}
static void
runMrbFile(mrb_state *mrb, const char *filename)
{
/* Execute compiled script */
FILE *f = fopen(filename, "r");
if (!f)
{
static char buffer[256];
snprintf(buffer, sizeof(buffer), "Unable to open compiled script '%s'", filename);
showError(buffer);
return;
}
mrb_irep *irep = mrb_read_irep_file(mrb, f);
if (!irep)
{
static char buffer[256];
snprintf(buffer, sizeof(buffer), "Unable to read compiled script '%s'", filename);
showError(buffer);
return;
}
RProc *proc = mrb_proc_new(mrb, irep);
mrb_run(mrb, proc, mrb_top_self(mrb));
fclose(f);
}
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static void
runRMXPScripts(mrb_state *mrb, mrbc_context *ctx)
{
const std::string &scriptPack = shState->rtData().config.game.scripts;
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if (scriptPack.empty())
{
showError("No game scripts specified (missing Game.ini?)");
return;
}
if (!shState->fileSystem().exists(scriptPack.c_str()))
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{
showError(std::string("Unable to open '") + scriptPack + "'");
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return;
}
/* We use a secondary util state to unmarshal the scripts */
mrb_state *scriptMrb = mrb_open();
SDL_RWops ops;
shState->fileSystem().openRead(ops, scriptPack.c_str());
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mrb_value scriptArray = mrb_nil_value();
std::string readError;
try
{
scriptArray = marshalLoadInt(scriptMrb, &ops);
}
catch (const Exception &e)
{
readError = std::string(": ") + e.msg;
}
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SDL_RWclose(&ops);
if (!mrb_array_p(scriptArray))
{
showError(std::string("Failed to read script data") + readError);
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mrb_close(scriptMrb);
return;
}
int scriptCount = mrb_ary_len(scriptMrb, scriptArray);
std::string decodeBuffer;
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decodeBuffer.resize(0x1000);
for (int i = 0; i < scriptCount; ++i)
{
mrb_value script = mrb_ary_entry(scriptArray, i);
mrb_value scriptChksum = mrb_ary_entry(script, 0);
mrb_value scriptName = mrb_ary_entry(script, 1);
mrb_value scriptString = mrb_ary_entry(script, 2);
(void) scriptChksum;
int result = Z_OK;
unsigned long bufferLen;
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while (true)
{
unsigned char *bufferPtr =
reinterpret_cast<unsigned char*>(const_cast<char*>(decodeBuffer.c_str()));
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unsigned char *sourcePtr =
reinterpret_cast<unsigned char*>(RSTRING_PTR(scriptString));
bufferLen = decodeBuffer.length();
result = uncompress(bufferPtr, &bufferLen,
sourcePtr, RSTRING_LEN(scriptString));
bufferPtr[bufferLen] = '\0';
if (result != Z_BUF_ERROR)
break;
decodeBuffer.resize(decodeBuffer.size()*2);
}
if (result != Z_OK)
{
static char buffer[256];
snprintf(buffer, sizeof(buffer), "Error decoding script %d: '%s'",
i, RSTRING_PTR(scriptName));
showError(buffer);
break;
}
ctx->filename = RSTRING_PTR(scriptName);
ctx->lineno = 1;
int ai = mrb_gc_arena_save(mrb);
/* Execute code */
mrb_load_nstring_cxt(mrb, decodeBuffer.c_str(), bufferLen, ctx);
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mrb_gc_arena_restore(mrb, ai);
if (mrb->exc)
break;
}
mrb_close(scriptMrb);
}
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static void mrbBindingExecute()
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{
mrb_state *mrb = mrb_open();
shState->setBindingData(mrb);
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MrbData mrbData(mrb);
mrb->ud = &mrbData;
mrb_define_module_function(mrb, mrb->kernel_module, "time_op",
mkxpTimeOp, MRB_ARGS_OPT(2) | MRB_ARGS_BLOCK());
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mrbBindingInit(mrb);
mrbc_context *ctx = mrbc_context_new(mrb);
ctx->capture_errors = 1;
const Config &conf = shState->rtData().config;
const std::string &customScript = conf.customScript;
// const std::string &mrbFile = conf.mrbFile;
(void) runMrbFile; // FIXME mrbFile support on ice for now
if (!customScript.empty())
runCustomScript(mrb, ctx, customScript.c_str());
// else if (!mrbFile.empty())
// runMrbFile(mrb, mrbFile.c_str());
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else
runRMXPScripts(mrb, ctx);
checkException(mrb);
shState->rtData().rqTermAck = true;
shState->texPool().disable();
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mrbc_context_free(mrb, ctx);
mrb_close(mrb);
}
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static void mrbBindingTerminate()
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{
mrb_state *mrb = static_cast<mrb_state*>(shState->bindingData());
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MrbData *data = static_cast<MrbData*>(mrb->ud);
mrb_raise(mrb, data->exc[Shutdown], "");
}