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Happy new year to the wonderful Godot community! We're starting a new decade with a well-established, non-profit, free and open source game engine, and tons of further improvements in the pipeline from hundreds of contributors. Godot will keep getting better, and we're looking forward to all the games that the community will keep developing and releasing with it.
383 lines
9.4 KiB
C++
383 lines
9.4 KiB
C++
/*************************************************************************/
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/* file_access_zip.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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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#ifdef MINIZIP_ENABLED
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#include "file_access_zip.h"
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#include "core/os/copymem.h"
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#include "core/os/file_access.h"
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ZipArchive *ZipArchive::instance = NULL;
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extern "C" {
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static void *godot_open(void *data, const char *p_fname, int mode) {
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if (mode & ZLIB_FILEFUNC_MODE_WRITE) {
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return NULL;
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}
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FileAccess *f = (FileAccess *)data;
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f->open(p_fname, FileAccess::READ);
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return f->is_open() ? data : NULL;
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}
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static uLong godot_read(void *data, void *fdata, void *buf, uLong size) {
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FileAccess *f = (FileAccess *)data;
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f->get_buffer((uint8_t *)buf, size);
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return size;
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}
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static uLong godot_write(voidpf opaque, voidpf stream, const void *buf, uLong size) {
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return 0;
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}
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static long godot_tell(voidpf opaque, voidpf stream) {
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FileAccess *f = (FileAccess *)opaque;
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return f->get_position();
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}
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static long godot_seek(voidpf opaque, voidpf stream, uLong offset, int origin) {
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FileAccess *f = (FileAccess *)opaque;
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int pos = offset;
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switch (origin) {
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case ZLIB_FILEFUNC_SEEK_CUR:
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pos = f->get_position() + offset;
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break;
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case ZLIB_FILEFUNC_SEEK_END:
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pos = f->get_len() + offset;
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break;
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default:
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break;
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}
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f->seek(pos);
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return 0;
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}
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static int godot_close(voidpf opaque, voidpf stream) {
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FileAccess *f = (FileAccess *)opaque;
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f->close();
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return 0;
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}
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static int godot_testerror(voidpf opaque, voidpf stream) {
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FileAccess *f = (FileAccess *)opaque;
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return f->get_error() != OK ? 1 : 0;
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}
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static voidpf godot_alloc(voidpf opaque, uInt items, uInt size) {
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return memalloc(items * size);
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}
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static void godot_free(voidpf opaque, voidpf address) {
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memfree(address);
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}
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} // extern "C"
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void ZipArchive::close_handle(unzFile p_file) const {
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ERR_FAIL_COND_MSG(!p_file, "Cannot close a file if none is open.");
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FileAccess *f = (FileAccess *)unzGetOpaque(p_file);
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unzCloseCurrentFile(p_file);
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unzClose(p_file);
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memdelete(f);
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}
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unzFile ZipArchive::get_file_handle(String p_file) const {
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ERR_FAIL_COND_V_MSG(!file_exists(p_file), NULL, "File '" + p_file + " doesn't exist.");
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File file = files[p_file];
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FileAccess *f = FileAccess::open(packages[file.package].filename, FileAccess::READ);
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ERR_FAIL_COND_V_MSG(!f, NULL, "Cannot open file '" + packages[file.package].filename + "'.");
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zlib_filefunc_def io;
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zeromem(&io, sizeof(io));
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io.opaque = f;
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io.zopen_file = godot_open;
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io.zread_file = godot_read;
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io.zwrite_file = godot_write;
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io.ztell_file = godot_tell;
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io.zseek_file = godot_seek;
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io.zclose_file = godot_close;
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io.zerror_file = godot_testerror;
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io.alloc_mem = godot_alloc;
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io.free_mem = godot_free;
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unzFile pkg = unzOpen2(packages[file.package].filename.utf8().get_data(), &io);
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ERR_FAIL_COND_V(!pkg, NULL);
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int unz_err = unzGoToFilePos(pkg, &file.file_pos);
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if (unz_err != UNZ_OK || unzOpenCurrentFile(pkg) != UNZ_OK) {
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unzClose(pkg);
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ERR_FAIL_V(NULL);
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}
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return pkg;
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}
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bool ZipArchive::try_open_pack(const String &p_path, bool p_replace_files) {
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//printf("opening zip pack %ls, %i, %i\n", p_name.c_str(), p_name.extension().nocasecmp_to("zip"), p_name.extension().nocasecmp_to("pcz"));
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if (p_path.get_extension().nocasecmp_to("zip") != 0 && p_path.get_extension().nocasecmp_to("pcz") != 0)
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return false;
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zlib_filefunc_def io;
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FileAccess *fa = FileAccess::open(p_path, FileAccess::READ);
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if (!fa)
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return false;
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io.opaque = fa;
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io.zopen_file = godot_open;
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io.zread_file = godot_read;
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io.zwrite_file = godot_write;
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io.ztell_file = godot_tell;
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io.zseek_file = godot_seek;
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io.zclose_file = godot_close;
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io.zerror_file = godot_testerror;
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unzFile zfile = unzOpen2(p_path.utf8().get_data(), &io);
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ERR_FAIL_COND_V(!zfile, false);
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unz_global_info64 gi;
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int err = unzGetGlobalInfo64(zfile, &gi);
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ERR_FAIL_COND_V(err != UNZ_OK, false);
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Package pkg;
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pkg.filename = p_path;
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pkg.zfile = zfile;
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packages.push_back(pkg);
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int pkg_num = packages.size() - 1;
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for (uint64_t i = 0; i < gi.number_entry; i++) {
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char filename_inzip[256];
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unz_file_info64 file_info;
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err = unzGetCurrentFileInfo64(zfile, &file_info, filename_inzip, sizeof(filename_inzip), NULL, 0, NULL, 0);
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ERR_CONTINUE(err != UNZ_OK);
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File f;
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f.package = pkg_num;
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unzGetFilePos(zfile, &f.file_pos);
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String fname = String("res://") + filename_inzip;
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files[fname] = f;
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uint8_t md5[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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PackedData::get_singleton()->add_path(p_path, fname, 1, 0, md5, this, p_replace_files);
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//printf("packed data add path %ls, %ls\n", p_name.c_str(), fname.c_str());
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if ((i + 1) < gi.number_entry) {
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unzGoToNextFile(zfile);
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}
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}
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return true;
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}
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bool ZipArchive::file_exists(String p_name) const {
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return files.has(p_name);
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}
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FileAccess *ZipArchive::get_file(const String &p_path, PackedData::PackedFile *p_file) {
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return memnew(FileAccessZip(p_path, *p_file));
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}
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ZipArchive *ZipArchive::get_singleton() {
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if (instance == NULL) {
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instance = memnew(ZipArchive);
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}
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return instance;
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}
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ZipArchive::ZipArchive() {
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instance = this;
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//fa_create_func = FileAccess::get_create_func();
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}
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ZipArchive::~ZipArchive() {
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for (int i = 0; i < packages.size(); i++) {
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FileAccess *f = (FileAccess *)unzGetOpaque(packages[i].zfile);
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unzClose(packages[i].zfile);
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memdelete(f);
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}
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packages.clear();
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}
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Error FileAccessZip::_open(const String &p_path, int p_mode_flags) {
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close();
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ERR_FAIL_COND_V(p_mode_flags & FileAccess::WRITE, FAILED);
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ZipArchive *arch = ZipArchive::get_singleton();
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ERR_FAIL_COND_V(!arch, FAILED);
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zfile = arch->get_file_handle(p_path);
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ERR_FAIL_COND_V(!zfile, FAILED);
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int err = unzGetCurrentFileInfo64(zfile, &file_info, NULL, 0, NULL, 0, NULL, 0);
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ERR_FAIL_COND_V(err != UNZ_OK, FAILED);
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return OK;
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}
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void FileAccessZip::close() {
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if (!zfile)
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return;
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ZipArchive *arch = ZipArchive::get_singleton();
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ERR_FAIL_COND(!arch);
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arch->close_handle(zfile);
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zfile = NULL;
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}
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bool FileAccessZip::is_open() const {
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return zfile != NULL;
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}
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void FileAccessZip::seek(size_t p_position) {
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ERR_FAIL_COND(!zfile);
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unzSeekCurrentFile(zfile, p_position);
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}
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void FileAccessZip::seek_end(int64_t p_position) {
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ERR_FAIL_COND(!zfile);
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unzSeekCurrentFile(zfile, get_len() + p_position);
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}
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size_t FileAccessZip::get_position() const {
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ERR_FAIL_COND_V(!zfile, 0);
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return unztell(zfile);
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}
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size_t FileAccessZip::get_len() const {
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ERR_FAIL_COND_V(!zfile, 0);
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return file_info.uncompressed_size;
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}
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bool FileAccessZip::eof_reached() const {
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ERR_FAIL_COND_V(!zfile, true);
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return at_eof;
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}
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uint8_t FileAccessZip::get_8() const {
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uint8_t ret = 0;
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get_buffer(&ret, 1);
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return ret;
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}
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int FileAccessZip::get_buffer(uint8_t *p_dst, int p_length) const {
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ERR_FAIL_COND_V(!zfile, -1);
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at_eof = unzeof(zfile);
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if (at_eof)
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return 0;
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int read = unzReadCurrentFile(zfile, p_dst, p_length);
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ERR_FAIL_COND_V(read < 0, read);
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if (read < p_length)
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at_eof = true;
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return read;
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}
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Error FileAccessZip::get_error() const {
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if (!zfile) {
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return ERR_UNCONFIGURED;
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}
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if (eof_reached()) {
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return ERR_FILE_EOF;
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}
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return OK;
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}
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void FileAccessZip::flush() {
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ERR_FAIL();
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}
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void FileAccessZip::store_8(uint8_t p_dest) {
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ERR_FAIL();
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}
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bool FileAccessZip::file_exists(const String &p_name) {
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return false;
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}
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FileAccessZip::FileAccessZip(const String &p_path, const PackedData::PackedFile &p_file) :
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zfile(NULL) {
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_open(p_path, FileAccess::READ);
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}
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FileAccessZip::~FileAccessZip() {
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close();
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}
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#endif
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