191 lines
5.2 KiB
C++
191 lines
5.2 KiB
C++
/*************************************************************************/
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/* pkc_packer.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 "pck_packer.h"
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#include "core/os/file_access.h"
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static uint64_t _align(uint64_t p_n, int p_alignment) {
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if (p_alignment == 0)
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return p_n;
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uint64_t rest = p_n % p_alignment;
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if (rest == 0)
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return p_n;
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else
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return p_n + (p_alignment - rest);
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};
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static void _pad(FileAccess *p_file, int p_bytes) {
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for (int i = 0; i < p_bytes; i++) {
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p_file->store_8(0);
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};
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};
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void PCKPacker::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("pck_start", "pck_name", "alignment"), &PCKPacker::pck_start);
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ObjectTypeDB::bind_method(_MD("add_file", "pck_path", "source_path"), &PCKPacker::add_file);
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ObjectTypeDB::bind_method(_MD("flush", "verbose"), &PCKPacker::flush);
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};
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Error PCKPacker::pck_start(const String &p_file, int p_alignment) {
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file = FileAccess::open(p_file, FileAccess::WRITE);
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if (file == NULL) {
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return ERR_CANT_CREATE;
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};
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alignment = p_alignment;
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file->store_32(0x43504447); // MAGIC
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file->store_32(0); // # version
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file->store_32(0); // # major
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file->store_32(0); // # minor
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file->store_32(0); // # revision
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for (int i = 0; i < 16; i++) {
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file->store_32(0); // reserved
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};
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files.clear();
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return OK;
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};
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Error PCKPacker::add_file(const String &p_file, const String &p_src) {
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FileAccess *f = FileAccess::open(p_src, FileAccess::READ);
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if (!f) {
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return ERR_FILE_CANT_OPEN;
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};
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File pf;
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pf.path = p_file;
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pf.src_path = p_src;
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pf.size = f->get_len();
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pf.offset_offset = 0;
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files.push_back(pf);
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f->close();
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memdelete(f);
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return OK;
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};
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Error PCKPacker::flush(bool p_verbose) {
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if (!file) {
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ERR_FAIL_COND_V(!file, ERR_INVALID_PARAMETER);
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return ERR_INVALID_PARAMETER;
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};
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// write the index
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file->store_32(files.size());
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for (int i = 0; i < files.size(); i++) {
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file->store_pascal_string(files[i].path);
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files[i].offset_offset = file->get_pos();
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file->store_64(0); // offset
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file->store_64(files[i].size); // size
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// # empty md5
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file->store_32(0);
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file->store_32(0);
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file->store_32(0);
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file->store_32(0);
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};
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uint64_t ofs = file->get_pos();
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ofs = _align(ofs, alignment);
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_pad(file, ofs - file->get_pos());
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const uint32_t buf_max = 65536;
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uint8_t *buf = memnew_arr(uint8_t, buf_max);
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int count = 0;
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for (int i = 0; i < files.size(); i++) {
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FileAccess *src = FileAccess::open(files[i].src_path, FileAccess::READ);
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uint64_t to_write = files[i].size;
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while (to_write > 0) {
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int read = src->get_buffer(buf, MIN(to_write, buf_max));
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file->store_buffer(buf, read);
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to_write -= read;
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};
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uint64_t pos = file->get_pos();
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file->seek(files[i].offset_offset); // go back to store the file's offset
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file->store_64(ofs);
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file->seek(pos);
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ofs = _align(ofs + files[i].size, alignment);
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_pad(file, ofs - pos);
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src->close();
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memdelete(src);
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count += 1;
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if (p_verbose) {
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if (count % 100 == 0) {
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printf("%i/%i (%.2f)\r", count, files.size(), float(count) / files.size() * 100);
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fflush(stdout);
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};
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};
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};
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if (p_verbose)
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printf("\n");
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file->close();
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memdelete(buf);
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return OK;
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};
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PCKPacker::PCKPacker() {
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file = NULL;
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};
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PCKPacker::~PCKPacker() {
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if (file != NULL) {
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memdelete(file);
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};
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file = NULL;
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};
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