godot/platform/android/file_access_android.cpp

/*************************************************************************/
/*  file_access_android.cpp                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
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/*************************************************************************/
#include "file_access_android.h"
#include "print_string.h"




AAssetManager *FileAccessAndroid::asset_manager=NULL;


/*void FileAccessAndroid::make_default() {

	create_func=create_android;
}*/

FileAccess* FileAccessAndroid::create_android() {

	return memnew(FileAccessAndroid);
}


Error FileAccessAndroid::_open(const String& p_path, int p_mode_flags) {

	String path=fix_path(p_path).simplify_path();
	if (path.begins_with("/"))
		path=path.substr(1,path.length());
	else if (path.begins_with("res://"))
		path=path.substr(6,path.length());


	ERR_FAIL_COND_V(p_mode_flags&FileAccess::WRITE,ERR_UNAVAILABLE); //can't write on android..
	a=AAssetManager_open(asset_manager,path.utf8().get_data(),AASSET_MODE_STREAMING);
	if (!a)
		return ERR_CANT_OPEN;
	//ERR_FAIL_COND_V(!a,ERR_FILE_NOT_FOUND);
	len=AAsset_getLength(a);
	pos=0;
	eof=false;

	return OK;
}

void FileAccessAndroid::close() {

	if (!a)
		return;
	AAsset_close(a);
	a=NULL;
}

bool FileAccessAndroid::is_open() const {

	return a!=NULL;
}

void FileAccessAndroid::seek(size_t p_position) {

	ERR_FAIL_COND(!a);
	AAsset_seek(a,p_position,SEEK_SET);
	pos=p_position;
	if (pos>len) {
		pos=len;
		eof=true;
	} else {
		eof=false;
	}

}

void FileAccessAndroid::seek_end(int64_t p_position) {

	ERR_FAIL_COND(!a);
	AAsset_seek(a,p_position,SEEK_END);
	pos=len+p_position;

}

size_t FileAccessAndroid::get_pos() const {

	return pos;
}

size_t FileAccessAndroid::get_len() const {

	return len;
}

bool FileAccessAndroid::eof_reached() const {

	return eof;
}

uint8_t FileAccessAndroid::get_8() const {


	if (pos>=len) {
		eof=true;
		return 0;
	}


	uint8_t byte;
	AAsset_read(a,&byte,1);
	pos++;
	return byte;

}

int FileAccessAndroid::get_buffer(uint8_t *p_dst, int p_length) const {


	off_t r = AAsset_read(a,p_dst,p_length);

	if (pos+p_length >len ) {
		eof=true;
	}

	if (r>=0) {

		pos+=r;
		if (pos>len) {
			pos=len;
		}

	}
	return r;

}

Error FileAccessAndroid::get_error() const {

	return eof?ERR_FILE_EOF:OK; //not sure what else it may happen
}

void FileAccessAndroid::store_8(uint8_t p_dest) {

	ERR_FAIL();

}

bool FileAccessAndroid::file_exists(const String& p_path) {

	String path=fix_path(p_path).simplify_path();
	if (path.begins_with("/"))
		path=path.substr(1,path.length());
	else if (path.begins_with("res://"))
		path=path.substr(6,path.length());

	AAsset *at=AAssetManager_open(asset_manager,path.utf8().get_data(),AASSET_MODE_STREAMING);

	if (!at)
		return false;

	AAsset_close(at);
	return true;

}


FileAccessAndroid::FileAccessAndroid() {
	a=NULL;
	eof=false;
}


FileAccessAndroid::~FileAccessAndroid()
{
	close();
}