1/**************************************************************************/
2/* zip_io.cpp */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
25/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
26/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#include "zip_io.h"
32
33#include "core/templates/local_vector.h"
34
35int godot_unzip_get_current_file_info(unzFile p_zip_file, unz_file_info64 &r_file_info, String &r_filepath) {
36 const uLong short_file_path_buffer_size = 16384ul;
37 char short_file_path_buffer[short_file_path_buffer_size];
38
39 int err = unzGetCurrentFileInfo64(p_zip_file, &r_file_info, short_file_path_buffer, short_file_path_buffer_size, nullptr, 0, nullptr, 0);
40 if (unlikely((err != UNZ_OK) || (r_file_info.size_filename > short_file_path_buffer_size))) {
41 LocalVector<char> long_file_path_buffer;
42 long_file_path_buffer.resize(r_file_info.size_filename);
43
44 err = unzGetCurrentFileInfo64(p_zip_file, &r_file_info, long_file_path_buffer.ptr(), long_file_path_buffer.size(), nullptr, 0, nullptr, 0);
45 if (err != UNZ_OK) {
46 return err;
47 }
48 r_filepath = String::utf8(long_file_path_buffer.ptr(), r_file_info.size_filename);
49 } else {
50 r_filepath = String::utf8(short_file_path_buffer, r_file_info.size_filename);
51 }
52
53 return err;
54}
55
56int godot_unzip_locate_file(unzFile p_zip_file, String p_filepath, bool p_case_sensitive) {
57 int err = unzGoToFirstFile(p_zip_file);
58 while (err == UNZ_OK) {
59 unz_file_info64 current_file_info;
60 String current_filepath;
61 err = godot_unzip_get_current_file_info(p_zip_file, current_file_info, current_filepath);
62 if (err == UNZ_OK) {
63 bool filepaths_are_equal = p_case_sensitive ? (p_filepath == current_filepath) : (p_filepath.nocasecmp_to(current_filepath) == 0);
64 if (filepaths_are_equal) {
65 return UNZ_OK;
66 }
67 err = unzGoToNextFile(p_zip_file);
68 }
69 }
70 return err;
71}
72
73//
74
75void *zipio_open(voidpf opaque, const char *p_fname, int mode) {
76 Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
77 ERR_FAIL_NULL_V(fa, nullptr);
78
79 String fname;
80 fname.parse_utf8(p_fname);
81
82 int file_access_mode = 0;
83 if (mode & ZLIB_FILEFUNC_MODE_READ) {
84 file_access_mode |= FileAccess::READ;
85 }
86 if (mode & ZLIB_FILEFUNC_MODE_WRITE) {
87 file_access_mode |= FileAccess::WRITE;
88 }
89 if (mode & ZLIB_FILEFUNC_MODE_CREATE) {
90 file_access_mode |= FileAccess::WRITE_READ;
91 }
92
93 (*fa) = FileAccess::open(fname, file_access_mode);
94 if (fa->is_null()) {
95 return nullptr;
96 }
97
98 return opaque;
99}
100
101uLong zipio_read(voidpf opaque, voidpf stream, void *buf, uLong size) {
102 Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
103 ERR_FAIL_NULL_V(fa, 0);
104 ERR_FAIL_COND_V(fa->is_null(), 0);
105
106 return (*fa)->get_buffer((uint8_t *)buf, size);
107}
108
109uLong zipio_write(voidpf opaque, voidpf stream, const void *buf, uLong size) {
110 Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
111 ERR_FAIL_NULL_V(fa, 0);
112 ERR_FAIL_COND_V(fa->is_null(), 0);
113
114 (*fa)->store_buffer((uint8_t *)buf, size);
115 return size;
116}
117
118long zipio_tell(voidpf opaque, voidpf stream) {
119 Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
120 ERR_FAIL_NULL_V(fa, 0);
121 ERR_FAIL_COND_V(fa->is_null(), 0);
122
123 return (*fa)->get_position();
124}
125
126long zipio_seek(voidpf opaque, voidpf stream, uLong offset, int origin) {
127 Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
128 ERR_FAIL_NULL_V(fa, 0);
129 ERR_FAIL_COND_V(fa->is_null(), 0);
130
131 uint64_t pos = offset;
132 switch (origin) {
133 case ZLIB_FILEFUNC_SEEK_CUR:
134 pos = (*fa)->get_position() + offset;
135 break;
136 case ZLIB_FILEFUNC_SEEK_END:
137 pos = (*fa)->get_length() + offset;
138 break;
139 default:
140 break;
141 }
142
143 (*fa)->seek(pos);
144 return 0;
145}
146
147int zipio_close(voidpf opaque, voidpf stream) {
148 Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
149 ERR_FAIL_NULL_V(fa, 0);
150 ERR_FAIL_COND_V(fa->is_null(), 0);
151
152 fa->unref();
153 return 0;
154}
155
156int zipio_testerror(voidpf opaque, voidpf stream) {
157 Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
158 ERR_FAIL_NULL_V(fa, 1);
159 ERR_FAIL_COND_V(fa->is_null(), 0);
160
161 return (fa->is_valid() && (*fa)->get_error() != OK) ? 1 : 0;
162}
163
164voidpf zipio_alloc(voidpf opaque, uInt items, uInt size) {
165 voidpf ptr = memalloc((size_t)items * size);
166 memset(ptr, 0, items * size);
167 return ptr;
168}
169
170void zipio_free(voidpf opaque, voidpf address) {
171 memfree(address);
172}
173
174zlib_filefunc_def zipio_create_io(Ref<FileAccess> *p_data) {
175 zlib_filefunc_def io;
176 io.opaque = (void *)p_data;
177 io.zopen_file = zipio_open;
178 io.zread_file = zipio_read;
179 io.zwrite_file = zipio_write;
180 io.ztell_file = zipio_tell;
181 io.zseek_file = zipio_seek;
182 io.zclose_file = zipio_close;
183 io.zerror_file = zipio_testerror;
184 io.alloc_mem = zipio_alloc;
185 io.free_mem = zipio_free;
186 return io;
187}
188