dolphin/Source/Core/Common/FileSearch.cpp

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// Copyright 2008 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
2021-12-10 03:22:16 +01:00
#include "Common/FileSearch.h"
#include <algorithm>
#include <filesystem>
#include <functional>
#include <iterator>
#include <system_error>
#include "Common/CommonPaths.h"
#include "Common/Logging/Log.h"
#include "Common/StringUtil.h"
#ifdef _MSC_VER
#include <Windows.h>
#else
#ifdef ANDROID
#include "jni/AndroidCommon/AndroidCommon.h"
#endif
#include <cstring>
#include "Common/CommonFuncs.h"
#include "Common/FileUtil.h"
#endif
namespace fs = std::filesystem;
namespace Common
{
std::vector<std::string> DoFileSearch(const std::vector<std::string>& directories,
const std::vector<std::string>& exts, bool recursive)
{
const bool accept_all = exts.empty();
std::vector<fs::path> native_exts;
for (const auto& ext : exts)
native_exts.push_back(StringToPath(ext));
// N.B. This avoids doing any copies
auto ext_matches = [&native_exts](const fs::path& path) {
const std::basic_string_view<fs::path::value_type> native_path = path.native();
return std::any_of(native_exts.cbegin(), native_exts.cend(), [&native_path](const auto& ext) {
const auto compare_len = ext.native().length();
if (native_path.length() < compare_len)
return false;
const auto substr_to_compare = native_path.substr(native_path.length() - compare_len);
#ifdef _WIN32
return CompareStringOrdinal(substr_to_compare.data(), static_cast<int>(compare_len),
ext.c_str(), static_cast<int>(compare_len), TRUE) == CSTR_EQUAL;
#else
return strncasecmp(substr_to_compare.data(), ext.c_str(), compare_len) == 0;
#endif
});
};
std::vector<std::string> result;
auto add_filtered = [&](const fs::directory_entry& entry) {
auto& path = entry.path();
if (accept_all || (!entry.is_directory() && ext_matches(path)))
result.emplace_back(PathToString(path));
};
for (const auto& directory : directories)
{
#ifdef ANDROID
if (IsPathAndroidContent(directory))
{
const std::vector<std::string> partial_result =
DoFileSearchAndroidContent(directory, exts, recursive);
result.insert(result.end(), std::make_move_iterator(partial_result.begin()),
std::make_move_iterator(partial_result.end()));
}
else
#endif
{
fs::path directory_path = StringToPath(directory);
std::error_code error;
if (recursive)
{
for (auto it = fs::recursive_directory_iterator(std::move(directory_path), error);
it != fs::recursive_directory_iterator(); it.increment(error))
add_filtered(*it);
}
else
{
for (auto it = fs::directory_iterator(std::move(directory_path), error);
it != fs::directory_iterator(); it.increment(error))
add_filtered(*it);
}
if (error)
ERROR_LOG_FMT(COMMON, "{} error on {}: {}", __func__, directory, error.message());
}
}
// Remove duplicates (occurring because caller gave e.g. duplicate or overlapping directories -
// not because std::filesystem returns duplicates). Also note that this pathname-based uniqueness
// isn't as thorough as std::filesystem::equivalent.
std::sort(result.begin(), result.end());
result.erase(std::unique(result.begin(), result.end()), result.end());
// Dolphin expects to be able to use "/" (DIR_SEP) everywhere.
// std::filesystem uses the OS separator.
constexpr fs::path::value_type os_separator = fs::path::preferred_separator;
static_assert(os_separator == DIR_SEP_CHR || os_separator == '\\', "Unsupported path separator");
if constexpr (os_separator != DIR_SEP_CHR)
{
for (auto& path : result)
std::replace(path.begin(), path.end(), '\\', DIR_SEP_CHR);
}
return result;
}
} // namespace Common