mkxp/binding-mri/filesystem-binding.cpp

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/*
** filesystem-binding.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-util.h"
#include "sharedstate.h"
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#include "filesystem.h"
#include "ruby/encoding.h"
#include "ruby/intern.h"
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#include <QDebug>
DEF_TYPE(FileInt);
static VALUE
fileIntForPath(const char *path)
{
SDL_RWops *ops = SDL_AllocRW();
shState->fileSystem().openRead(*ops, path);
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VALUE klass = rb_const_get(rb_cObject, rb_intern("FileInt"));
VALUE obj = rb_obj_alloc(klass);
setPrivateData(obj, ops, FileIntType);
return obj;
}
RB_METHOD(fileIntRead)
{
int length = -1;
rb_get_args(argc, argv, "i", &length, RB_ARG_END);
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SDL_RWops *ops = getPrivateData<SDL_RWops>(self);
if (length == -1)
{
Sint64 cur = SDL_RWtell(ops);
Sint64 end = SDL_RWseek(ops, 0, SEEK_END);
length = end - cur;
SDL_RWseek(ops, cur, SEEK_SET);
}
if (length == 0)
return Qnil;
VALUE data = rb_str_new(0, length);
SDL_RWread(ops, RSTRING_PTR(data), 1, length);
return data;
}
RB_METHOD(fileIntClose)
{
RB_UNUSED_PARAM;
SDL_RWops *ops = getPrivateData<SDL_RWops>(self);
SDL_RWclose(ops);
return Qnil;
}
RB_METHOD(fileIntGetByte)
{
RB_UNUSED_PARAM;
SDL_RWops *ops = getPrivateData<SDL_RWops>(self);
unsigned char byte;
size_t result = SDL_RWread(ops, &byte, 1, 1);
return (result == 1) ? rb_fix_new(byte) : Qnil;
}
RB_METHOD(fileIntBinmode)
{
RB_UNUSED_PARAM;
return Qnil;
}
static void
fileIntFreeInstance(void *inst)
{
SDL_RWops *ops = static_cast<SDL_RWops*>(inst);
SDL_RWclose(ops);
SDL_FreeRW(ops);
}
VALUE
kernelLoadDataInt(const char *filename)
{
rb_gc_start();
VALUE port = fileIntForPath(filename);
VALUE marsh = rb_const_get(rb_cObject, rb_intern("Marshal"));
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// FIXME need to catch exceptions here with begin rescue
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VALUE result = rb_funcall(marsh, rb_intern("load"), 1, port);
rb_funcall(port, rb_intern("close"), 0);
return result;
}
RB_METHOD(kernelLoadData)
{
RB_UNUSED_PARAM;
const char *filename;
rb_get_args(argc, argv, "z", &filename, RB_ARG_END);
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return kernelLoadDataInt(filename);
}
RB_METHOD(kernelSaveData)
{
RB_UNUSED_PARAM;
VALUE obj;
VALUE filename;
rb_get_args(argc, argv, "oS", &obj, &filename, RB_ARG_END);
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VALUE file = rb_funcall(rb_cFile, rb_intern("open"), 2, filename, rb_str_new_cstr("w"));
VALUE marsh = rb_const_get(rb_cObject, rb_intern("Marshal"));
rb_funcall(marsh, rb_intern("dump"), 2, obj, file);
rb_funcall(file, rb_intern("close"), 0);
return Qnil;
}
static VALUE stringForceUTF8(VALUE arg)
{
if (rb_type(arg) != RUBY_T_STRING)
return arg;
rb_enc_associate(arg, rb_utf8_encoding());
return arg;
}
RB_METHOD(_marshalLoad)
{
RB_UNUSED_PARAM;
VALUE port, proc = Qnil;
rb_get_args(argc, argv, "o|o", &port, &proc, RB_ARG_END);
if (rb_type(proc) != RUBY_T_NIL)
rb_raise(rb_eNotImpError, "MKXP: Marshal with custom proc not (yet) implemented");
VALUE utf8Proc = rb_proc_new(RUBY_METHOD_FUNC(stringForceUTF8), Qnil);
VALUE marsh = rb_const_get(rb_cObject, rb_intern("Marshal"));
return rb_funcall(marsh, rb_intern("_mkxp_load_alias"), 2, port, utf8Proc);
}
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void
fileIntBindingInit()
{
initType(FileIntType, "FileInt", fileIntFreeInstance);
VALUE klass = rb_define_class("FileInt", rb_cIO);
_rb_define_method(klass, "read", fileIntRead);
_rb_define_method(klass, "getbyte", fileIntGetByte);
_rb_define_method(klass, "binmode", fileIntBinmode);
_rb_define_method(klass, "close", fileIntClose);
_rb_define_module_function(rb_mKernel, "load_data", kernelLoadData);
_rb_define_module_function(rb_mKernel, "save_data", kernelSaveData);
/* We overload the built-in 'Marshal::load()' function to silently
* insert our utf8proc that ensures all read strings will be
* UTF-8 encoded */
VALUE marsh = rb_const_get(rb_cObject, rb_intern("Marshal"));
rb_define_alias(rb_singleton_class(marsh), "_mkxp_load_alias", "load");
_rb_define_module_function(marsh, "load", _marshalLoad);
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}