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construct/include/ircd/fs/path.h

94 lines
3.3 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_FS_PATH_H
// Forward declarations for boost because it is not included here.
namespace boost::filesystem
{
struct path;
}
namespace ircd::fs
{
using path_views = vector_view<const string_view>;
using path_strings = vector_view<const std::string>;
extern const size_t NAME_MAX_LEN;
extern const size_t PATH_MAX_LEN;
// convenience tls buffers of appropriate size.
extern const mutable_buffer path_scratch;
extern const mutable_buffer name_scratch;
filesystem::path _path(std::string);
filesystem::path _path(const string_view &);
filesystem::path _path(const path_views &);
filesystem::path _path(const path_strings &);
string_view path(const mutable_buffer &, const path_views &);
string_view path(const mutable_buffer &, const path_strings &);
string_view path(const mutable_buffer &, const filesystem::path &);
template<class... A> std::string path_string(A&&...);
const char *path_cstr(const string_view &path); // rotating internal TLS buffer
bool is_relative(const string_view &path);
bool is_absolute(const string_view &path);
string_view extension(const mutable_buffer &, const string_view &path, const string_view &replace);
string_view extension(const mutable_buffer &, const string_view &path);
string_view relative(const mutable_buffer &, const string_view &root, const string_view &path);
string_view filename(const mutable_buffer &, const string_view &path);
string_view parent(const mutable_buffer &, const string_view &path);
long pathconf(const string_view &path, const int &arg);
size_t name_max_len(const string_view &path);
size_t path_max_len(const string_view &path);
string_view cwd(const mutable_buffer &buf);
std::string cwd();
}
/// Configuration items storing the base paths used at runtime for program
/// operation. The defaults are generated at ./configure time and obtained
/// from macros in config.h. As conf items, these values may be overriden by
/// environment variables and may be updated by conf loads from the database.
///
namespace ircd::fs::base
{
extern conf::item<std::string> prefix; // e.g. /usr
extern conf::item<std::string> bin; // e.g. /usr/bin
extern conf::item<std::string> etc; // e.g. /etc
extern conf::item<std::string> include; // e.g. /usr/include/ircd
extern conf::item<std::string> lib; // e.g. /usr/lib
extern conf::item<std::string> modules; // e.g. /usr/lib/modules/ircd
extern conf::item<std::string> share; // e.g. /usr/share/ircd
extern conf::item<std::string> run; // e.g. /var/run/ircd
extern conf::item<std::string> log; // e.g. /var/log/ircd
extern conf::item<std::string> db; // e.g. /var/db/ircd
}
template<class... A>
std::string
ircd::fs::path_string(A&&... a)
{
const size_t &size
{
PATH_MAX_LEN | SHRINK_TO_FIT
};
return util::string(size, [&a...]
(const mutable_buffer &buf)
{
return path(buf, std::forward<A>(a)...);
});
}