pcsx2/common/ZipHelpers.h

142 lines
3.6 KiB
C++

// SPDX-FileCopyrightText: 2002-2024 PCSX2 Dev Team
// SPDX-License-Identifier: GPL-3.0+
#pragma once
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "zip.h"
#include "Console.h"
static inline std::unique_ptr<zip_t, void (*)(zip_t*)> zip_open_managed(const char* filename, int flags, zip_error_t* ze)
{
zip_source_t* zs = zip_source_file_create(filename, 0, 0, ze);
zip_t* zip = nullptr;
if (zs && !(zip = zip_open_from_source(zs, flags, ze)))
{
// have to clean up source
zip_source_free(zs);
}
return std::unique_ptr<zip_t, void (*)(zip_t*)>(zip, [](zip_t* zf) {
if (!zf)
return;
int err = zip_close(zf);
if (err != 0)
{
Console.Error("Failed to close zip file: %d", err);
zip_discard(zf);
}
});
}
static inline std::unique_ptr<zip_t, void (*)(zip_t*)> zip_open_buffer_managed(const void* buffer, size_t size, int flags, int freep, zip_error_t* ze)
{
zip_source_t* zs = zip_source_buffer_create(buffer, size, freep, ze);
zip_t* zip = nullptr;
if (zs && !(zip = zip_open_from_source(zs, flags, ze)))
{
// have to clean up source
zip_source_free(zs);
}
return std::unique_ptr<zip_t, void (*)(zip_t*)>(zip, [](zip_t* zf) {
if (!zf)
return;
int err = zip_close(zf);
if (err != 0)
{
Console.Error("Failed to close zip file: %d", err);
zip_discard(zf);
}
});
}
static inline std::unique_ptr<zip_file_t, int (*)(zip_file_t*)> zip_fopen_managed(zip_t* zip, const char* filename, zip_flags_t flags)
{
return std::unique_ptr<zip_file_t, int (*)(zip_file_t*)>(zip_fopen(zip, filename, flags), zip_fclose);
}
static inline std::unique_ptr<zip_file_t, int (*)(zip_file_t*)> zip_fopen_index_managed(zip_t* zip, zip_uint64_t index, zip_flags_t flags)
{
return std::unique_ptr<zip_file_t, int (*)(zip_file_t*)>(zip_fopen_index(zip, index, flags), zip_fclose);
}
template<typename T>
static inline std::optional<T> ReadFileInZipToContainer(zip_t* zip, const char* name)
{
std::optional<T> ret;
const zip_int64_t file_index = zip_name_locate(zip, name, ZIP_FL_NOCASE);
if (file_index >= 0)
{
zip_stat_t zst;
if (zip_stat_index(zip, file_index, ZIP_FL_NOCASE, &zst) == 0)
{
zip_file_t* zf = zip_fopen_index(zip, file_index, ZIP_FL_NOCASE);
if (zf)
{
ret = T();
ret->resize(static_cast<size_t>(zst.size));
if (zip_fread(zf, ret->data(), ret->size()) != static_cast<zip_int64_t>(ret->size()))
{
ret.reset();
}
}
}
}
return ret;
}
template <typename T>
static inline std::optional<T> ReadFileInZipToContainer(zip_file_t* file, u32 chunk_size = 4096)
{
std::optional<T> ret = T();
for (;;)
{
const size_t pos = ret->size();
ret->resize(pos + chunk_size);
const s64 read = zip_fread(file, ret->data() + pos, chunk_size);
if (read < 0)
{
// read error
ret.reset();
break;
}
// if less than chunk size, we're EOF
if (read != static_cast<s64>(chunk_size))
{
ret->resize(pos + static_cast<size_t>(read));
break;
}
}
return ret;
}
static inline std::optional<std::string> ReadFileInZipToString(zip_t* zip, const char* name)
{
return ReadFileInZipToContainer<std::string>(zip, name);
}
static inline std::optional<std::string> ReadFileInZipToString(zip_file_t* file, u32 chunk_size = 4096)
{
return ReadFileInZipToContainer<std::string>(file, chunk_size);
}
static inline std::optional<std::vector<u8>> ReadBinaryFileInZip(zip_t* zip, const char* name)
{
return ReadFileInZipToContainer<std::vector<u8>>(zip, name);
}
static inline std::optional<std::vector<u8>> ReadBinaryFileInZip(zip_file_t* file, u32 chunk_size = 4096)
{
return ReadFileInZipToContainer<std::vector<u8>>(file, chunk_size);
}