mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-23 06:15:38 +00:00
72 lines
2.8 KiB
C++
72 lines
2.8 KiB
C++
|
#ifndef _C4_STD_STRING_VIEW_HPP_
|
||
|
|
#define _C4_STD_STRING_VIEW_HPP_
|
||
|
|
|
||
|
|
/** @file string_view.hpp */
|
||
|
|
|
||
|
|
#ifndef C4CORE_SINGLE_HEADER
|
||
|
|
#include "c4/language.hpp"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if (C4_CPP >= 17 && defined(__cpp_lib_string_view))
|
||
|
|
|
||
|
|
#ifndef C4CORE_SINGLE_HEADER
|
||
|
|
#include "c4/substr.hpp"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <string_view>
|
||
|
|
|
||
|
|
|
||
|
|
namespace c4 {
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
/** create a csubstr from an existing std::string_view. */
|
||
|
|
C4_ALWAYS_INLINE c4::csubstr to_csubstr(std::string_view s) noexcept
|
||
|
|
{
|
||
|
|
return c4::csubstr(s.data(), s.size());
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
C4_ALWAYS_INLINE bool operator== (c4::csubstr ss, std::string_view s) { return ss.compare(s.data(), s.size()) == 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator!= (c4::csubstr ss, std::string_view s) { return ss.compare(s.data(), s.size()) != 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator>= (c4::csubstr ss, std::string_view s) { return ss.compare(s.data(), s.size()) >= 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator> (c4::csubstr ss, std::string_view s) { return ss.compare(s.data(), s.size()) > 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator<= (c4::csubstr ss, std::string_view s) { return ss.compare(s.data(), s.size()) <= 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator< (c4::csubstr ss, std::string_view s) { return ss.compare(s.data(), s.size()) < 0; }
|
||
|
|
|
||
|
|
C4_ALWAYS_INLINE bool operator== (std::string_view s, c4::csubstr ss) { return ss.compare(s.data(), s.size()) == 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator!= (std::string_view s, c4::csubstr ss) { return ss.compare(s.data(), s.size()) != 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator<= (std::string_view s, c4::csubstr ss) { return ss.compare(s.data(), s.size()) >= 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator< (std::string_view s, c4::csubstr ss) { return ss.compare(s.data(), s.size()) > 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator>= (std::string_view s, c4::csubstr ss) { return ss.compare(s.data(), s.size()) <= 0; }
|
||
|
|
C4_ALWAYS_INLINE bool operator> (std::string_view s, c4::csubstr ss) { return ss.compare(s.data(), s.size()) < 0; }
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
/** copy an std::string_view to a writeable substr */
|
||
|
|
inline size_t to_chars(c4::substr buf, std::string_view s)
|
||
|
|
{
|
||
|
|
C4_ASSERT(!buf.overlaps(to_csubstr(s)));
|
||
|
|
size_t sz = s.size();
|
||
|
|
size_t len = buf.len < sz ? buf.len : sz;
|
||
|
|
// calling memcpy with null strings is undefined behavior
|
||
|
|
// and will wreak havoc in calling code's branches.
|
||
|
|
// see https://github.com/biojppm/rapidyaml/pull/264#issuecomment-1262133637
|
||
|
|
if(len)
|
||
|
|
{
|
||
|
|
C4_ASSERT(s.data() != nullptr);
|
||
|
|
C4_ASSERT(buf.str != nullptr);
|
||
|
|
memcpy(buf.str, s.data(), len);
|
||
|
|
}
|
||
|
|
return sz; // return the number of needed chars
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace c4
|
||
|
|
|
||
|
|
#endif // C4_STRING_VIEW_AVAILABLE
|
||
|
|
|
||
|
|
#endif // _C4_STD_STRING_VIEW_HPP_
|