Merge branch 'develop' into ryzomclassic-develop
kaetemi
4 years ago
commit
35e18597ee
@ -0,0 +1,131 @@
|
||||
// NeL - MMORPG Framework <https://wiki.ryzom.dev/>
|
||||
// Copyright (C) 2020 Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
|
||||
//
|
||||
// This program is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Affero General Public License as
|
||||
// published by the Free Software Foundation, either version 3 of the
|
||||
// License, or (at your option) any later version.
|
||||
//
|
||||
// This program is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Affero General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Affero General Public License
|
||||
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
#ifndef NLMISC_STRING_VIEW_H
|
||||
#define NLMISC_STRING_VIEW_H
|
||||
|
||||
#include <nel/misc/types_nl.h>
|
||||
#include <string>
|
||||
|
||||
#ifdef NL_CPP14
|
||||
using namespace std::string_literals;
|
||||
#ifdef NL_CPP17
|
||||
#include <string_view>
|
||||
using namespace std::string_view_literals;
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#ifdef NL_CPP14
|
||||
/// Obtain an std::string from a string literal.
|
||||
#define nlstr(strLit) (strLit##s)
|
||||
#else
|
||||
/// Obtain an std::string from a string literal.
|
||||
#define nlstr(strLit) (std::string(strLit))
|
||||
#endif
|
||||
|
||||
#ifdef NL_CPP17
|
||||
/// Obtain a string view from a string literal.
|
||||
#define nlsv(strLit) (strLit##sv)
|
||||
/// Obtain an std::string from a string view.
|
||||
#define nlsvs(strView) (std::string(strView))
|
||||
#else
|
||||
/// Obtain a string view from a string literal.
|
||||
#define nlsv(strLit) (CStringView(strLit, ::strlen(strLit)))
|
||||
/// Obtain an std::string from a string view.
|
||||
#define nlsvs(strView) (std::string(strView.data(), strView.size()))
|
||||
#endif
|
||||
|
||||
/// Obtain a temporary C-string from a string view. Use directly in argument, do not store.
|
||||
#define nlsvc(strView) ((strView.data()[strView.size()]) ? nlsvs(strView).c_str() : strView.data())
|
||||
|
||||
namespace NLMISC {
|
||||
|
||||
/// String view literals allow bypassing allocation and strlen calls.
|
||||
/// CStringView is a 100% drop-in replacement for (const char *str, size_t len) tuples. It's a non-owning reference.
|
||||
/// Always use `CStringView` where previously `const std::string &` would have been used. It avoids accidental copy.
|
||||
/// Gotcha: CStringView doesn't need to end with \0, so there's no guarantee with functions that expect \0 terminated strings,
|
||||
/// use the `nlsvc` macro to get a temporary C-string from a CStringView.
|
||||
/// Use the `nlsv` macro to get a CStringView from a string literal.
|
||||
/// Use the `nlstr` macro to get an std::string from a string literal.
|
||||
/// Use the `nlsvs` macro to get an std::string from a CStringView.
|
||||
#ifdef NL_CPP17
|
||||
typedef std::string_view CStringView;
|
||||
#else
|
||||
class CStringView
|
||||
{
|
||||
public:
|
||||
CStringView(const std::string &str) : m_Str(&str[0]), m_Len(str.size()) {}
|
||||
CStringView(const char *const str, const size_t len) : m_Str(str), m_Len(len) {}
|
||||
CStringView(const char *const str) : m_Str(str), m_Len(sizeof(str)) {}
|
||||
|
||||
inline const char *data() const { return m_Str; }
|
||||
inline size_t length() const { return m_Len; }
|
||||
inline size_t size() const { return m_Len; }
|
||||
|
||||
inline CStringView substr(const size_t offset, const size_t count = -1) { return CStringView(m_Str + offset, std::min(m_Len - offset, count)); }
|
||||
|
||||
inline bool operator==(const CStringView o) { if (m_Len != o.m_Len) return false; return memcmp(m_Str, o.m_Str, m_Len) == 0; }
|
||||
inline bool operator!=(const CStringView o) { if (m_Len != o.m_Len) return true; return memcmp(m_Str, o.m_Str, m_Len) != 0; }
|
||||
|
||||
struct const_iterator
|
||||
{
|
||||
public:
|
||||
const_iterator() : m_Addr(NULL) { }
|
||||
|
||||
inline void operator++()
|
||||
{
|
||||
++m_Addr;
|
||||
}
|
||||
inline void operator+=(ptrdiff_t v)
|
||||
{
|
||||
m_Addr += v;
|
||||
}
|
||||
inline void operator--()
|
||||
{
|
||||
--m_Addr;
|
||||
}
|
||||
inline void operator-=(ptrdiff_t v)
|
||||
{
|
||||
m_Addr -= v;
|
||||
}
|
||||
inline bool operator!=(const const_iterator &o) const { return m_Addr != o.m_Addr; }
|
||||
inline bool operator==(const const_iterator &o) const { return m_Addr == o.m_Addr; }
|
||||
inline const char &operator*() const { return *m_Addr; }
|
||||
|
||||
private:
|
||||
friend class CStringView;
|
||||
inline const_iterator(const char *addr) : m_Addr(addr) {}
|
||||
const char *m_Addr;
|
||||
|
||||
};
|
||||
|
||||
typedef const_iterator iterator;
|
||||
|
||||
iterator begin() const { return iterator(m_Str); }
|
||||
inline iterator end() const { return iterator(m_Str + m_Len); }
|
||||
|
||||
private:
|
||||
const char *m_Str;
|
||||
size_t m_Len;
|
||||
|
||||
};
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
#endif /* #ifndef NLMISC_STRING_VIEW_H */
|
||||
|
||||
/* end of file */
|
||||
@ -0,0 +1,31 @@
|
||||
// NeL - MMORPG Framework <https://wiki.ryzom.dev/>
|
||||
// Copyright (C) 2020 Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
|
||||
//
|
||||
// This program is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Affero General Public License as
|
||||
// published by the Free Software Foundation, either version 3 of the
|
||||
// License, or (at your option) any later version.
|
||||
//
|
||||
// This program is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Affero General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Affero General Public License
|
||||
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
#include "stdmisc.h"
|
||||
#include "nel/misc/string_view.h"
|
||||
|
||||
// STL includes
|
||||
|
||||
// Project includes
|
||||
|
||||
namespace NLMISC
|
||||
{
|
||||
|
||||
void nothing_here_string_view_nl() { }
|
||||
|
||||
} /* namespace NLMISC */
|
||||
|
||||
/* end of file */
|
||||
Loading…
Reference in New Issue