196 lines
5 KiB
C++
196 lines
5 KiB
C++
/*************************************************************************/
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/* file_access_memory.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "file_access_memory.h"
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#include "os/dir_access.h"
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#include "os/copymem.h"
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#include "globals.h"
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#include "map.h"
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static Map<String, Vector<uint8_t> >* files = NULL;
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void FileAccessMemory::register_file(String p_name, Vector<uint8_t> p_data) {
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if (!files) {
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files = memnew((Map<String, Vector<uint8_t> >));
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}
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String name;
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if (Globals::get_singleton())
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name = Globals::get_singleton()->globalize_path(p_name);
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else
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name = p_name;
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name = DirAccess::normalize_path(name);
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(*files)[name] = p_data;
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}
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void FileAccessMemory::cleanup() {
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if (!files)
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return;
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memdelete(files);
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}
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FileAccess* FileAccessMemory::create() {
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return memnew(FileAccessMemory);
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}
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bool FileAccessMemory::file_exists(const String& p_name) {
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String name = fix_path(p_name);
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name = DirAccess::normalize_path(name);
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return files && (files->find(name) != NULL);
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}
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Error FileAccessMemory::open_custom(const uint8_t* p_data, int p_len) {
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data=(uint8_t*)p_data;
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length=p_len;
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pos=0;
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return OK;
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}
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Error FileAccessMemory::_open(const String& p_path, int p_mode_flags) {
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ERR_FAIL_COND_V(!files, ERR_FILE_NOT_FOUND);
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String name = fix_path(p_path);
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name = DirAccess::normalize_path(name);
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Map<String, Vector<uint8_t> >::Element* E = files->find(name);
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ERR_FAIL_COND_V(!E, ERR_FILE_NOT_FOUND);
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data = &(E->get()[0]);
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length = E->get().size();
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pos = 0;
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return OK;
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}
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void FileAccessMemory::close() {
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data = NULL;
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}
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bool FileAccessMemory::is_open() const {
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return data != NULL;
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}
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void FileAccessMemory::seek(size_t p_position) {
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ERR_FAIL_COND(!data);
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pos = p_position;
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}
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void FileAccessMemory::seek_end(int64_t p_position) {
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ERR_FAIL_COND(!data);
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pos = length + p_position;
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}
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size_t FileAccessMemory::get_pos() const {
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ERR_FAIL_COND_V(!data, 0);
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return pos;
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}
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size_t FileAccessMemory::get_len() const {
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ERR_FAIL_COND_V(!data, 0);
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return length;
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}
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bool FileAccessMemory::eof_reached() const {
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return pos > length;
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}
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uint8_t FileAccessMemory::get_8() const {
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uint8_t ret = 0;
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if (pos < length) {
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ret = data[pos];
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}
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++pos;
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return ret;
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}
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int FileAccessMemory::get_buffer(uint8_t *p_dst,int p_length) const {
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ERR_FAIL_COND_V(!data, -1);
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int left = length - pos;
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int read = MIN(p_length, left);
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if (read < p_length) {
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WARN_PRINT("Reading less data than requested");
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};
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copymem(p_dst, &data[pos], read);
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pos += p_length;
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return read;
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}
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Error FileAccessMemory::get_error() const {
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return pos >= length ? ERR_FILE_EOF : OK;
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}
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void FileAccessMemory::store_8(uint8_t p_byte) {
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ERR_FAIL_COND(!data);
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ERR_FAIL_COND(pos >= length);
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data[pos++] = p_byte;
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}
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void FileAccessMemory::store_buffer(const uint8_t *p_src,int p_length) {
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int left = length - pos;
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int write = MIN(p_length, left);
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if (write < p_length) {
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WARN_PRINT("Writing less data than requested");
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}
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copymem(&data[pos], p_src, write);
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pos += p_length;
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}
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FileAccessMemory::FileAccessMemory() {
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data = NULL;
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}
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