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#pragma once
// Wrappers of some glib functions (why are we using glib then?) which we want, but glib.h is a bit C like
#ifdef __cplusplus
# include <cstdint>
extern "C" {
#else
# include <stdint.h>
#endif
const char * next_char(const char *);
uint32_t get_codepoint(const char *);
#ifdef __cplusplus
}
# include <string_view>
# include <algorithm>
struct utf8_string_view {
struct iter {
constexpr explicit iter(const char * p) : pos {p} { }
[[nodiscard]] auto
operator!=(const iter & other) const
{
return pos != other.pos;
}
auto &
operator++()
{
pos = next_char(pos);
return *this;
}
[[nodiscard]] auto
operator*() const
{
return get_codepoint(pos);
}
private:
const char * pos;
};
template<typename Str>
// cppcheck-suppress noExplicitConstructor; NOLINTNEXTLINE(hicpp-explicit-conversions)
constexpr utf8_string_view(const Str & str) : begin_ {str.data()}, end_ {str.data() + str.length()}
{
}
// cppcheck-suppress noExplicitConstructor; NOLINTNEXTLINE(hicpp-explicit-conversions)
constexpr utf8_string_view(const char * const str) : utf8_string_view {std::string_view {str}} { }
[[nodiscard]] auto
begin() const
{
return iter {begin_};
}
[[nodiscard]] auto
end() const
{
return iter {end_};
}
[[nodiscard]] size_t length() const;
private:
const char *begin_, *end_;
};
template<> struct std::iterator_traits<utf8_string_view::iter> {
using difference_type = size_t;
using value_type = uint32_t;
using pointer = void;
using reference = void;
using iterator_category = std::forward_iterator_tag;
};
[[nodiscard]] inline size_t
utf8_string_view::length() const
{
return std::distance(begin(), end());
}
#endif
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