501 lines
11 KiB
C++
501 lines
11 KiB
C++
/*************************************************************************/
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/* file_access_pack.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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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_pack.h"
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#include "core/version.h"
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#include <stdio.h>
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#define PACK_VERSION 1
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Error PackedData::add_pack(const String &p_path) {
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for (int i = 0; i < sources.size(); i++) {
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if (sources[i]->try_open_pack(p_path)) {
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return OK;
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};
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};
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return ERR_FILE_UNRECOGNIZED;
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};
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void PackedData::add_path(const String &pkg_path, const String &path, uint64_t ofs, uint64_t size, const uint8_t *p_md5, PackSource *p_src) {
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PathMD5 pmd5(path.md5_buffer());
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//printf("adding path %ls, %lli, %lli\n", path.c_str(), pmd5.a, pmd5.b);
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bool exists = files.has(pmd5);
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PackedFile pf;
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pf.pack = pkg_path;
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pf.offset = ofs;
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pf.size = size;
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for (int i = 0; i < 16; i++)
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pf.md5[i] = p_md5[i];
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pf.src = p_src;
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files[pmd5] = pf;
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if (!exists) {
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//search for dir
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String p = path.replace_first("res://", "");
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PackedDir *cd = root;
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if (p.find("/") != -1) { //in a subdir
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Vector<String> ds = p.get_base_dir().split("/");
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for (int j = 0; j < ds.size(); j++) {
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if (!cd->subdirs.has(ds[j])) {
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PackedDir *pd = memnew(PackedDir);
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pd->name = ds[j];
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pd->parent = cd;
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cd->subdirs[pd->name] = pd;
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cd = pd;
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} else {
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cd = cd->subdirs[ds[j]];
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}
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}
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}
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String filename = path.get_file();
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// Don't add as a file if the path points to a directoryy
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if (!filename.empty()) {
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cd->files.insert(filename);
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}
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}
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}
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void PackedData::add_pack_source(PackSource *p_source) {
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if (p_source != NULL) {
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sources.push_back(p_source);
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}
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};
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PackedData *PackedData::singleton = NULL;
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PackedData::PackedData() {
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singleton = this;
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root = memnew(PackedDir);
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root->parent = NULL;
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disabled = false;
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add_pack_source(memnew(PackedSourcePCK));
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}
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void PackedData::_free_packed_dirs(PackedDir *p_dir) {
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for (Map<String, PackedDir *>::Element *E = p_dir->subdirs.front(); E; E = E->next())
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_free_packed_dirs(E->get());
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memdelete(p_dir);
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}
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PackedData::~PackedData() {
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for (int i = 0; i < sources.size(); i++) {
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memdelete(sources[i]);
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}
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_free_packed_dirs(root);
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}
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//////////////////////////////////////////////////////////////////
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bool PackedSourcePCK::try_open_pack(const String &p_path) {
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FileAccess *f = FileAccess::open(p_path, FileAccess::READ);
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if (!f)
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return false;
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//printf("try open %ls!\n", p_path.c_str());
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uint32_t magic = f->get_32();
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if (magic != 0x43504447) {
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//maybe at he end.... self contained exe
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f->seek_end();
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f->seek(f->get_position() - 4);
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magic = f->get_32();
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if (magic != 0x43504447) {
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memdelete(f);
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return false;
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}
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f->seek(f->get_position() - 12);
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uint64_t ds = f->get_64();
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f->seek(f->get_position() - ds - 8);
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magic = f->get_32();
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if (magic != 0x43504447) {
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memdelete(f);
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return false;
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}
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}
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uint32_t version = f->get_32();
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uint32_t ver_major = f->get_32();
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uint32_t ver_minor = f->get_32();
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f->get_32(); // ver_rev
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ERR_EXPLAIN("Pack version unsupported: " + itos(version));
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ERR_FAIL_COND_V(version != PACK_VERSION, false);
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ERR_EXPLAIN("Pack created with a newer version of the engine: " + itos(ver_major) + "." + itos(ver_minor));
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ERR_FAIL_COND_V(ver_major > VERSION_MAJOR || (ver_major == VERSION_MAJOR && ver_minor > VERSION_MINOR), false);
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for (int i = 0; i < 16; i++) {
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//reserved
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f->get_32();
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}
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int file_count = f->get_32();
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for (int i = 0; i < file_count; i++) {
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uint32_t sl = f->get_32();
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CharString cs;
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cs.resize(sl + 1);
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f->get_buffer((uint8_t *)cs.ptr(), sl);
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cs[sl] = 0;
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String path;
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path.parse_utf8(cs.ptr());
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uint64_t ofs = f->get_64();
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uint64_t size = f->get_64();
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uint8_t md5[16];
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f->get_buffer(md5, 16);
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PackedData::get_singleton()->add_path(p_path, path, ofs, size, md5, this);
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};
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return true;
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};
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FileAccess *PackedSourcePCK::get_file(const String &p_path, PackedData::PackedFile *p_file) {
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return memnew(FileAccessPack(p_path, *p_file));
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};
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//////////////////////////////////////////////////////////////////
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Error FileAccessPack::_open(const String &p_path, int p_mode_flags) {
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ERR_FAIL_V(ERR_UNAVAILABLE);
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return ERR_UNAVAILABLE;
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}
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void FileAccessPack::close() {
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f->close();
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}
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bool FileAccessPack::is_open() const {
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return f->is_open();
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}
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void FileAccessPack::seek(size_t p_position) {
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if (p_position > pf.size) {
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eof = true;
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} else {
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eof = false;
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}
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f->seek(pf.offset + p_position);
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pos = p_position;
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}
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void FileAccessPack::seek_end(int64_t p_position) {
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seek(pf.size + p_position);
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}
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size_t FileAccessPack::get_position() const {
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return pos;
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}
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size_t FileAccessPack::get_len() const {
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return pf.size;
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}
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bool FileAccessPack::eof_reached() const {
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return eof;
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}
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uint8_t FileAccessPack::get_8() const {
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if (pos >= pf.size) {
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eof = true;
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return 0;
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}
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pos++;
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return f->get_8();
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}
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int FileAccessPack::get_buffer(uint8_t *p_dst, int p_length) const {
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if (eof)
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return 0;
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int64_t to_read = p_length;
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if (to_read + pos > pf.size) {
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eof = true;
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to_read = int64_t(pf.size) - int64_t(pos);
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}
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pos += p_length;
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if (to_read <= 0)
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return 0;
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f->get_buffer(p_dst, to_read);
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return to_read;
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}
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void FileAccessPack::set_endian_swap(bool p_swap) {
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FileAccess::set_endian_swap(p_swap);
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f->set_endian_swap(p_swap);
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}
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Error FileAccessPack::get_error() const {
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if (eof)
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return ERR_FILE_EOF;
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return OK;
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}
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void FileAccessPack::flush() {
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ERR_FAIL();
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}
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void FileAccessPack::store_8(uint8_t p_dest) {
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ERR_FAIL();
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}
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void FileAccessPack::store_buffer(const uint8_t *p_src, int p_length) {
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ERR_FAIL();
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}
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bool FileAccessPack::file_exists(const String &p_name) {
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return false;
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}
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FileAccessPack::FileAccessPack(const String &p_path, const PackedData::PackedFile &p_file) :
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pf(p_file),
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f(FileAccess::open(pf.pack, FileAccess::READ)) {
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if (!f) {
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ERR_EXPLAIN("Can't open pack-referenced file: " + String(pf.pack));
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ERR_FAIL_COND(!f);
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}
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f->seek(pf.offset);
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pos = 0;
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eof = false;
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}
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FileAccessPack::~FileAccessPack() {
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if (f)
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memdelete(f);
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}
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//////////////////////////////////////////////////////////////////////////////////
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// DIR ACCESS
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//////////////////////////////////////////////////////////////////////////////////
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Error DirAccessPack::list_dir_begin() {
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list_dirs.clear();
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list_files.clear();
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for (Map<String, PackedData::PackedDir *>::Element *E = current->subdirs.front(); E; E = E->next()) {
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list_dirs.push_back(E->key());
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}
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for (Set<String>::Element *E = current->files.front(); E; E = E->next()) {
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list_files.push_back(E->get());
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}
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return OK;
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}
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String DirAccessPack::get_next() {
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if (list_dirs.size()) {
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cdir = true;
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String d = list_dirs.front()->get();
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list_dirs.pop_front();
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return d;
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} else if (list_files.size()) {
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cdir = false;
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String f = list_files.front()->get();
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list_files.pop_front();
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return f;
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} else {
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return String();
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}
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}
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bool DirAccessPack::current_is_dir() const {
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return cdir;
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}
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bool DirAccessPack::current_is_hidden() const {
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return false;
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}
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void DirAccessPack::list_dir_end() {
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list_dirs.clear();
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list_files.clear();
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}
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int DirAccessPack::get_drive_count() {
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return 0;
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}
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String DirAccessPack::get_drive(int p_drive) {
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return "";
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}
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Error DirAccessPack::change_dir(String p_dir) {
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String nd = p_dir.replace("\\", "/");
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bool absolute = false;
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if (nd.begins_with("res://")) {
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nd = nd.replace_first("res://", "");
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absolute = true;
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}
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nd = nd.simplify_path();
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if (nd == "") nd = ".";
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if (nd.begins_with("/")) {
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nd = nd.replace_first("/", "");
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absolute = true;
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}
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Vector<String> paths = nd.split("/");
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PackedData::PackedDir *pd;
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if (absolute)
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pd = PackedData::get_singleton()->root;
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else
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pd = current;
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for (int i = 0; i < paths.size(); i++) {
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String p = paths[i];
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if (p == ".") {
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continue;
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} else if (p == "..") {
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if (pd->parent) {
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pd = pd->parent;
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}
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} else if (pd->subdirs.has(p)) {
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pd = pd->subdirs[p];
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} else {
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return ERR_INVALID_PARAMETER;
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}
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}
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current = pd;
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return OK;
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}
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String DirAccessPack::get_current_dir() {
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PackedData::PackedDir *pd = current;
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String p = current->name;
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while (pd->parent) {
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pd = pd->parent;
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p = pd->name.plus_file(p);
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}
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return "res://" + p;
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}
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bool DirAccessPack::file_exists(String p_file) {
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return current->files.has(p_file);
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}
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bool DirAccessPack::dir_exists(String p_dir) {
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return current->subdirs.has(p_dir);
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}
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Error DirAccessPack::make_dir(String p_dir) {
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return ERR_UNAVAILABLE;
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}
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Error DirAccessPack::rename(String p_from, String p_to) {
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return ERR_UNAVAILABLE;
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}
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Error DirAccessPack::remove(String p_name) {
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return ERR_UNAVAILABLE;
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}
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size_t DirAccessPack::get_space_left() {
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return 0;
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}
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DirAccessPack::DirAccessPack() {
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current = PackedData::get_singleton()->root;
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cdir = false;
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}
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DirAccessPack::~DirAccessPack() {
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}
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