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/**************************************************************************/
/* zip_io.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. */
/**************************************************************************/
#include "zip_io.h"
#include "core/templates/local_vector.h"
int godot_unzip_get_current_file_info(unzFile p_zip_file, unz_file_info64 &r_file_info, String &r_filepath) {
const uLong short_file_path_buffer_size = 16384ul;
char short_file_path_buffer[short_file_path_buffer_size];
int err = unzGetCurrentFileInfo64(p_zip_file, &r_file_info, short_file_path_buffer, short_file_path_buffer_size, nullptr, 0, nullptr, 0);
if (unlikely((err != UNZ_OK) || (r_file_info.size_filename > short_file_path_buffer_size))) {
LocalVector<char> long_file_path_buffer;
long_file_path_buffer.resize(r_file_info.size_filename);
err = unzGetCurrentFileInfo64(p_zip_file, &r_file_info, long_file_path_buffer.ptr(), long_file_path_buffer.size(), nullptr, 0, nullptr, 0);
if (err != UNZ_OK) {
return err;
}
r_filepath = String::utf8(long_file_path_buffer.ptr(), r_file_info.size_filename);
} else {
r_filepath = String::utf8(short_file_path_buffer, r_file_info.size_filename);
}
return err;
}
int godot_unzip_locate_file(unzFile p_zip_file, const String &p_filepath, bool p_case_sensitive) {
int err = unzGoToFirstFile(p_zip_file);
while (err == UNZ_OK) {
unz_file_info64 current_file_info;
String current_filepath;
err = godot_unzip_get_current_file_info(p_zip_file, current_file_info, current_filepath);
if (err == UNZ_OK) {
bool filepaths_are_equal = p_case_sensitive ? (p_filepath == current_filepath) : (p_filepath.nocasecmp_to(current_filepath) == 0);
if (filepaths_are_equal) {
return UNZ_OK;
}
err = unzGoToNextFile(p_zip_file);
}
}
return err;
}
//
void *zipio_open(voidpf opaque, const char *p_fname, int mode) {
Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
ERR_FAIL_NULL_V(fa, nullptr);
String fname;
fname.parse_utf8(p_fname);
int file_access_mode = 0;
if (mode & ZLIB_FILEFUNC_MODE_READ) {
file_access_mode |= FileAccess::READ;
}
if (mode & ZLIB_FILEFUNC_MODE_WRITE) {
file_access_mode |= FileAccess::WRITE;
}
if (mode & ZLIB_FILEFUNC_MODE_CREATE) {
file_access_mode |= FileAccess::WRITE_READ;
}
(*fa) = FileAccess::open(fname, file_access_mode);
if (fa->is_null()) {
return nullptr;
}
return opaque;
}
uLong zipio_read(voidpf opaque, voidpf stream, void *buf, uLong size) {
Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
ERR_FAIL_NULL_V(fa, 0);
ERR_FAIL_COND_V(fa->is_null(), 0);
return (*fa)->get_buffer((uint8_t *)buf, size);
}
uLong zipio_write(voidpf opaque, voidpf stream, const void *buf, uLong size) {
Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
ERR_FAIL_NULL_V(fa, 0);
ERR_FAIL_COND_V(fa->is_null(), 0);
(*fa)->store_buffer((uint8_t *)buf, size);
return size;
}
long zipio_tell(voidpf opaque, voidpf stream) {
Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
ERR_FAIL_NULL_V(fa, 0);
ERR_FAIL_COND_V(fa->is_null(), 0);
return (*fa)->get_position();
}
long zipio_seek(voidpf opaque, voidpf stream, uLong offset, int origin) {
Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
ERR_FAIL_NULL_V(fa, 0);
ERR_FAIL_COND_V(fa->is_null(), 0);
uint64_t pos = offset;
switch (origin) {
case ZLIB_FILEFUNC_SEEK_CUR:
pos = (*fa)->get_position() + offset;
break;
case ZLIB_FILEFUNC_SEEK_END:
pos = (*fa)->get_length() + offset;
break;
default:
break;
}
(*fa)->seek(pos);
return 0;
}
int zipio_close(voidpf opaque, voidpf stream) {
Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
ERR_FAIL_NULL_V(fa, 0);
ERR_FAIL_COND_V(fa->is_null(), 0);
fa->unref();
return 0;
}
int zipio_testerror(voidpf opaque, voidpf stream) {
Ref<FileAccess> *fa = reinterpret_cast<Ref<FileAccess> *>(opaque);
ERR_FAIL_NULL_V(fa, 1);
ERR_FAIL_COND_V(fa->is_null(), 0);
return (fa->is_valid() && (*fa)->get_error() != OK) ? 1 : 0;
}
voidpf zipio_alloc(voidpf opaque, uInt items, uInt size) {
voidpf ptr = memalloc((size_t)items * size);
memset(ptr, 0, items * size);
return ptr;
}
void zipio_free(voidpf opaque, voidpf address) {
memfree(address);
}
zlib_filefunc_def zipio_create_io(Ref<FileAccess> *p_data) {
zlib_filefunc_def io;
io.opaque = (void *)p_data;
io.zopen_file = zipio_open;
io.zread_file = zipio_read;
io.zwrite_file = zipio_write;
io.ztell_file = zipio_tell;
io.zseek_file = zipio_seek;
io.zclose_file = zipio_close;
io.zerror_file = zipio_testerror;
io.alloc_mem = zipio_alloc;
io.free_mem = zipio_free;
return io;
}
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