godot/core/io/file_access_memory.cpp
2014-02-09 22:10:30 -03:00

189 lines
4.8 KiB
C++

/*************************************************************************/
/* file_access_memory.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2014 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 */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "file_access_memory.h"
#include "os/dir_access.h"
#include "os/copymem.h"
#include "globals.h"
#include "map.h"
static Map<String, Vector<uint8_t> >* files = NULL;
void FileAccessMemory::register_file(String p_name, Vector<uint8_t> p_data) {
if (!files) {
files = memnew((Map<String, Vector<uint8_t> >));
};
String name;
if (Globals::get_singleton())
name = Globals::get_singleton()->globalize_path(p_name);
else
name = p_name;
name = DirAccess::normalize_path(name);
(*files)[name] = p_data;
};
void FileAccessMemory::cleanup() {
if (!files)
return;
memdelete(files);
};
FileAccess* FileAccessMemory::create() {
return memnew(FileAccessMemory);
};
bool FileAccessMemory::file_exists(const String& p_name) {
String name = fix_path(p_name);
name = DirAccess::normalize_path(name);
return files && (files->find(name) != NULL);
};
Error FileAccessMemory::_open(const String& p_path, int p_mode_flags) {
ERR_FAIL_COND_V(!files, ERR_FILE_NOT_FOUND);
String name = fix_path(p_path);
name = DirAccess::normalize_path(name);
Map<String, Vector<uint8_t> >::Element* E = files->find(name);
ERR_FAIL_COND_V(!E, ERR_FILE_NOT_FOUND);
data = &(E->get()[0]);
length = E->get().size();
pos = 0;
return OK;
};
void FileAccessMemory::close() {
data = NULL;
};
bool FileAccessMemory::is_open() const {
return data != NULL;
};
void FileAccessMemory::seek(size_t p_position) {
ERR_FAIL_COND(!data);
pos = p_position;
};
void FileAccessMemory::seek_end(int64_t p_position) {
ERR_FAIL_COND(!data);
pos = length + p_position;
};
size_t FileAccessMemory::get_pos() const {
ERR_FAIL_COND_V(!data, 0);
return pos;
};
size_t FileAccessMemory::get_len() const {
ERR_FAIL_COND_V(!data, 0);
return length;
};
bool FileAccessMemory::eof_reached() const {
return pos >= length;
};
uint8_t FileAccessMemory::get_8() const {
uint8_t ret;
if (pos < length) {
ret = data[pos];
};
++pos;
return ret;
};
int FileAccessMemory::get_buffer(uint8_t *p_dst,int p_length) const {
ERR_FAIL_COND_V(!data, -1);
int left = length - pos;
int read = MIN(p_length, left);
if (read < p_length) {
WARN_PRINT("Reading less data than requested");
};
copymem(p_dst, &data[pos], read);
pos += p_length;
return read;
};
Error FileAccessMemory::get_error() const {
return pos >= length ? ERR_FILE_EOF : OK;
};
void FileAccessMemory::store_8(uint8_t p_byte) {
ERR_FAIL_COND(!data);
ERR_FAIL_COND(pos >= length);
data[pos++] = p_byte;
};
void FileAccessMemory::store_buffer(const uint8_t *p_src,int p_length) {
int left = length - pos;
int write = MIN(p_length, left);
if (write < p_length) {
WARN_PRINT("Writing less data than requested");
};
copymem(&data[pos], p_src, write);
pos += p_length;
};
FileAccessMemory::FileAccessMemory() {
data = NULL;
}