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- /**************************************************************************/
- /* file_access_zip.cpp */
- /**************************************************************************/
- /* This file is part of: */
- /* GODOT ENGINE */
- /* https://godotengine.org */
- /**************************************************************************/
- /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
- /* 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. */
- /**************************************************************************/
- #ifdef MINIZIP_ENABLED
- #include "file_access_zip.h"
- #include "core/io/file_access.h"
- ZipArchive *ZipArchive::instance = nullptr;
- extern "C" {
- struct ZipData {
- Ref<FileAccess> f;
- };
- static void *godot_open(voidpf opaque, const char *p_fname, int mode) {
- if (mode & ZLIB_FILEFUNC_MODE_WRITE) {
- return nullptr;
- }
- Ref<FileAccess> f = FileAccess::open(String::utf8(p_fname), FileAccess::READ);
- ERR_FAIL_COND_V(f.is_null(), nullptr);
- ZipData *zd = memnew(ZipData);
- zd->f = f;
- return zd;
- }
- static uLong godot_read(voidpf opaque, voidpf stream, void *buf, uLong size) {
- ZipData *zd = (ZipData *)stream;
- zd->f->get_buffer((uint8_t *)buf, size);
- return size;
- }
- static uLong godot_write(voidpf opaque, voidpf stream, const void *buf, uLong size) {
- return 0;
- }
- static long godot_tell(voidpf opaque, voidpf stream) {
- ZipData *zd = (ZipData *)stream;
- return zd->f->get_position();
- }
- static long godot_seek(voidpf opaque, voidpf stream, uLong offset, int origin) {
- ZipData *zd = (ZipData *)stream;
- uint64_t pos = offset;
- switch (origin) {
- case ZLIB_FILEFUNC_SEEK_CUR:
- pos = zd->f->get_position() + offset;
- break;
- case ZLIB_FILEFUNC_SEEK_END:
- pos = zd->f->get_length() + offset;
- break;
- default:
- break;
- }
- zd->f->seek(pos);
- return 0;
- }
- static int godot_close(voidpf opaque, voidpf stream) {
- ZipData *zd = (ZipData *)stream;
- memdelete(zd);
- return 0;
- }
- static int godot_testerror(voidpf opaque, voidpf stream) {
- ZipData *zd = (ZipData *)stream;
- return zd->f->get_error() != OK ? 1 : 0;
- }
- static voidpf godot_alloc(voidpf opaque, uInt items, uInt size) {
- return memalloc((size_t)items * size);
- }
- static void godot_free(voidpf opaque, voidpf address) {
- memfree(address);
- }
- } // extern "C"
- void ZipArchive::close_handle(unzFile p_file) const {
- ERR_FAIL_NULL_MSG(p_file, "Cannot close a file if none is open.");
- unzCloseCurrentFile(p_file);
- unzClose(p_file);
- }
- unzFile ZipArchive::get_file_handle(const String &p_file) const {
- ERR_FAIL_COND_V_MSG(!file_exists(p_file), nullptr, "File '" + p_file + " doesn't exist.");
- File file = files[p_file];
- zlib_filefunc_def io;
- memset(&io, 0, sizeof(io));
- io.opaque = nullptr;
- io.zopen_file = godot_open;
- io.zread_file = godot_read;
- io.zwrite_file = godot_write;
- io.ztell_file = godot_tell;
- io.zseek_file = godot_seek;
- io.zclose_file = godot_close;
- io.zerror_file = godot_testerror;
- io.alloc_mem = godot_alloc;
- io.free_mem = godot_free;
- unzFile pkg = unzOpen2(packages[file.package].filename.utf8().get_data(), &io);
- ERR_FAIL_NULL_V_MSG(pkg, nullptr, "Cannot open file '" + packages[file.package].filename + "'.");
- int unz_err = unzGoToFilePos(pkg, &file.file_pos);
- if (unz_err != UNZ_OK || unzOpenCurrentFile(pkg) != UNZ_OK) {
- unzClose(pkg);
- ERR_FAIL_V(nullptr);
- }
- return pkg;
- }
- bool ZipArchive::try_open_pack(const String &p_path, bool p_replace_files, uint64_t p_offset = 0) {
- // load with offset feature only supported for PCK files
- ERR_FAIL_COND_V_MSG(p_offset != 0, false, "Invalid PCK data. Note that loading files with a non-zero offset isn't supported with ZIP archives.");
- if (p_path.get_extension().nocasecmp_to("zip") != 0 && p_path.get_extension().nocasecmp_to("pcz") != 0) {
- return false;
- }
- zlib_filefunc_def io;
- memset(&io, 0, sizeof(io));
- io.opaque = nullptr;
- io.zopen_file = godot_open;
- io.zread_file = godot_read;
- io.zwrite_file = godot_write;
- io.ztell_file = godot_tell;
- io.zseek_file = godot_seek;
- io.zclose_file = godot_close;
- io.zerror_file = godot_testerror;
- unzFile zfile = unzOpen2(p_path.utf8().get_data(), &io);
- ERR_FAIL_NULL_V(zfile, false);
- unz_global_info64 gi;
- int err = unzGetGlobalInfo64(zfile, &gi);
- ERR_FAIL_COND_V(err != UNZ_OK, false);
- Package pkg;
- pkg.filename = p_path;
- pkg.zfile = zfile;
- packages.push_back(pkg);
- int pkg_num = packages.size() - 1;
- for (uint64_t i = 0; i < gi.number_entry; i++) {
- char filename_inzip[256];
- unz_file_info64 file_info;
- err = unzGetCurrentFileInfo64(zfile, &file_info, filename_inzip, sizeof(filename_inzip), nullptr, 0, nullptr, 0);
- ERR_CONTINUE(err != UNZ_OK);
- File f;
- f.package = pkg_num;
- unzGetFilePos(zfile, &f.file_pos);
- String fname = String("res://") + String::utf8(filename_inzip);
- files[fname] = f;
- uint8_t md5[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
- PackedData::get_singleton()->add_path(p_path, fname, 1, 0, md5, this, p_replace_files, false);
- //printf("packed data add path %s, %s\n", p_name.utf8().get_data(), fname.utf8().get_data());
- if ((i + 1) < gi.number_entry) {
- unzGoToNextFile(zfile);
- }
- }
- return true;
- }
- bool ZipArchive::file_exists(const String &p_name) const {
- return files.has(p_name);
- }
- Ref<FileAccess> ZipArchive::get_file(const String &p_path, PackedData::PackedFile *p_file) {
- return memnew(FileAccessZip(p_path, *p_file));
- }
- ZipArchive *ZipArchive::get_singleton() {
- if (instance == nullptr) {
- instance = memnew(ZipArchive);
- }
- return instance;
- }
- ZipArchive::ZipArchive() {
- instance = this;
- }
- ZipArchive::~ZipArchive() {
- for (int i = 0; i < packages.size(); i++) {
- unzClose(packages[i].zfile);
- }
- packages.clear();
- }
- Error FileAccessZip::open_internal(const String &p_path, int p_mode_flags) {
- _close();
- ERR_FAIL_COND_V(p_mode_flags & FileAccess::WRITE, FAILED);
- ZipArchive *arch = ZipArchive::get_singleton();
- ERR_FAIL_NULL_V(arch, FAILED);
- zfile = arch->get_file_handle(p_path);
- ERR_FAIL_NULL_V(zfile, FAILED);
- int err = unzGetCurrentFileInfo64(zfile, &file_info, nullptr, 0, nullptr, 0, nullptr, 0);
- ERR_FAIL_COND_V(err != UNZ_OK, FAILED);
- return OK;
- }
- void FileAccessZip::_close() {
- if (!zfile) {
- return;
- }
- ZipArchive *arch = ZipArchive::get_singleton();
- ERR_FAIL_NULL(arch);
- arch->close_handle(zfile);
- zfile = nullptr;
- }
- bool FileAccessZip::is_open() const {
- return zfile != nullptr;
- }
- void FileAccessZip::seek(uint64_t p_position) {
- ERR_FAIL_NULL(zfile);
- unzSeekCurrentFile(zfile, p_position);
- }
- void FileAccessZip::seek_end(int64_t p_position) {
- ERR_FAIL_NULL(zfile);
- unzSeekCurrentFile(zfile, get_length() + p_position);
- }
- uint64_t FileAccessZip::get_position() const {
- ERR_FAIL_NULL_V(zfile, 0);
- return unztell64(zfile);
- }
- uint64_t FileAccessZip::get_length() const {
- ERR_FAIL_NULL_V(zfile, 0);
- return file_info.uncompressed_size;
- }
- bool FileAccessZip::eof_reached() const {
- ERR_FAIL_NULL_V(zfile, true);
- return at_eof;
- }
- uint8_t FileAccessZip::get_8() const {
- uint8_t ret = 0;
- get_buffer(&ret, 1);
- return ret;
- }
- uint64_t FileAccessZip::get_buffer(uint8_t *p_dst, uint64_t p_length) const {
- ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
- ERR_FAIL_NULL_V(zfile, -1);
- at_eof = unzeof(zfile);
- if (at_eof) {
- return 0;
- }
- int64_t read = unzReadCurrentFile(zfile, p_dst, p_length);
- ERR_FAIL_COND_V(read < 0, read);
- if ((uint64_t)read < p_length) {
- at_eof = true;
- }
- return read;
- }
- Error FileAccessZip::get_error() const {
- if (!zfile) {
- return ERR_UNCONFIGURED;
- }
- if (eof_reached()) {
- return ERR_FILE_EOF;
- }
- return OK;
- }
- void FileAccessZip::flush() {
- ERR_FAIL();
- }
- void FileAccessZip::store_8(uint8_t p_dest) {
- ERR_FAIL();
- }
- bool FileAccessZip::file_exists(const String &p_name) {
- return false;
- }
- void FileAccessZip::close() {
- _close();
- }
- FileAccessZip::FileAccessZip(const String &p_path, const PackedData::PackedFile &p_file) {
- open_internal(p_path, FileAccess::READ);
- }
- FileAccessZip::~FileAccessZip() {
- _close();
- }
- #endif // MINIZIP_ENABLED
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