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iterate through directory entries in lexigraphical order

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Jeff Becker 2021-10-06 14:04:11 -04:00
parent 5a5765edd5
commit 00f81b1dac
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GPG Key ID: F357B3B42F6F9B05
1 changed files with 14 additions and 24 deletions
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38
llarp/util/fs.hpp
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@ -1,12 +1,7 @@
#pragma once
#include <functional>
#if defined(WIN32) || defined(_WIN32)
#define PATH_SEP "\\"
#else
#define PATH_SEP "/"
#endif
#include <set>
#ifdef USE_GHC_FILESYSTEM
#include <ghc/filesystem.hpp>
@ -61,36 +56,31 @@ namespace llarp
return std::make_optional<T>(pathname, mode);
}
using PathVisitor = std::function<bool(const fs::path&)>;
using PathIter = std::function<void(const fs::path&, PathVisitor)>;
static PathIter IterDir = [](const fs::path& path, PathVisitor visit) {
#ifdef _MSC_VER
for (auto& p : fs::directory_iterator(path))
{
if (!visit(p.path()))
{
break;
}
}
#else
template <typename PathVisitor>
static void
IterDir(const fs::path& path, PathVisitor visit)
{
DIR* d = opendir(path.string().c_str());
if (d == nullptr)
return;
struct dirent* ent = nullptr;
std::set<fs::path> entries;
do
{
ent = readdir(d);
if (!ent)
if (not ent)
break;
if (ent->d_name[0] == '.')
continue;
fs::path p = path / fs::path(ent->d_name);
if (!visit(p))
break;
entries.emplace(path / fs::path(ent->d_name));
} while (ent);
closedir(d);
#endif
for (const auto& p : entries)
{
if (not visit(p))
return;
}
};
} // namespace util
} // namespace llarp