dep: Add rapidyaml

dep/rapidyaml/include/c4/std/tuple.hpp

@@ -0,0 +1,184 @@
+#ifndef _C4_STD_TUPLE_HPP_
+#define _C4_STD_TUPLE_HPP_
+
+/** @file tuple.hpp */
+
+#ifndef C4CORE_SINGLE_HEADER
+#include "c4/format.hpp"
+#endif
+
+#include <tuple>
+
+/** this is a work in progress */
+#undef C4_TUPLE_TO_CHARS
+
+namespace c4 {
+
+#ifdef C4_TUPLE_TO_CHARS
+namespace detail {
+
+template< size_t Curr, class... Types >
+struct tuple_helper
+{
+    static size_t do_cat(substr buf, std::tuple< Types... > const& tp)
+    {
+        size_t num = to_chars(buf, std::get<Curr>(tp));
+        buf = buf.len >= num ? buf.sub(num) : substr{};
+        num += tuple_helper< Curr+1, Types... >::do_cat(buf, tp);
+        return num;
+    }
+
+    static size_t do_uncat(csubstr buf, std::tuple< Types... > & tp)
+    {
+        size_t num = from_str_trim(buf, &std::get<Curr>(tp));
+        if(num == csubstr::npos) return csubstr::npos;
+        buf = buf.len >= num ? buf.sub(num) : substr{};
+        num += tuple_helper< Curr+1, Types... >::do_uncat(buf, tp);
+        return num;
+    }
+
+    template< class Sep >
+    static size_t do_catsep_more(substr buf, Sep const& sep, std::tuple< Types... > const& tp)
+    {
+        size_t ret = to_chars(buf, sep), num = ret;
+        buf  = buf.len >= ret ? buf.sub(ret) : substr{};
+        ret  = to_chars(buf, std::get<Curr>(tp));
+        num += ret;
+        buf  = buf.len >= ret ? buf.sub(ret) : substr{};
+        ret  = tuple_helper< Curr+1, Types... >::do_catsep_more(buf, sep, tp);
+        num += ret;
+        return num;
+    }
+
+    template< class Sep >
+    static size_t do_uncatsep_more(csubstr buf, Sep & sep, std::tuple< Types... > & tp)
+    {
+        size_t ret = from_str_trim(buf, &sep), num = ret;
+        if(ret == csubstr::npos) return csubstr::npos;
+        buf  = buf.len >= ret ? buf.sub(ret) : substr{};
+        ret  = from_str_trim(buf, &std::get<Curr>(tp));
+        if(ret == csubstr::npos) return csubstr::npos;
+        num += ret;
+        buf  = buf.len >= ret ? buf.sub(ret) : substr{};
+        ret  = tuple_helper< Curr+1, Types... >::do_uncatsep_more(buf, sep, tp);
+        if(ret == csubstr::npos) return csubstr::npos;
+        num += ret;
+        return num;
+    }
+
+    static size_t do_format(substr buf, csubstr fmt, std::tuple< Types... > const& tp)
+    {
+        auto pos = fmt.find("{}");
+        if(pos != csubstr::npos)
+        {
+            size_t num = to_chars(buf, fmt.sub(0, pos));
+            size_t out = num;
+            buf  = buf.len >= num ? buf.sub(num) : substr{};
+            num  = to_chars(buf, std::get<Curr>(tp));
+            out += num;
+            buf  = buf.len >= num ? buf.sub(num) : substr{};
+            num  = tuple_helper< Curr+1, Types... >::do_format(buf, fmt.sub(pos + 2), tp);
+            out += num;
+            return out;
+        }
+        else
+        {
+            return format(buf, fmt);
+        }
+    }
+
+    static size_t do_unformat(csubstr buf, csubstr fmt, std::tuple< Types... > & tp)
+    {
+        auto pos = fmt.find("{}");
+        if(pos != csubstr::npos)
+        {
+            size_t num = pos;
+            size_t out = num;
+            buf  = buf.len >= num ? buf.sub(num) : substr{};
+            num  = from_str_trim(buf, &std::get<Curr>(tp));
+            out += num;
+            buf  = buf.len >= num ? buf.sub(num) : substr{};
+            num  = tuple_helper< Curr+1, Types... >::do_unformat(buf, fmt.sub(pos + 2), tp);
+            out += num;
+            return out;
+        }
+        else
+        {
+            return tuple_helper< sizeof...(Types), Types... >::do_unformat(buf, fmt, tp);
+        }
+    }
+
+};
+
+/** @todo VS compilation fails for this class */
+template< class... Types >
+struct tuple_helper< sizeof...(Types), Types... >
+{
+    static size_t do_cat(substr /*buf*/, std::tuple<Types...> const& /*tp*/) { return 0; }
+    static size_t do_uncat(csubstr /*buf*/, std::tuple<Types...> & /*tp*/) { return 0; }
+
+    template< class Sep > static size_t do_catsep_more(substr /*buf*/, Sep const& /*sep*/, std::tuple<Types...> const& /*tp*/) { return 0; }
+    template< class Sep > static size_t do_uncatsep_more(csubstr /*buf*/, Sep & /*sep*/, std::tuple<Types...> & /*tp*/) { return 0; }
+
+    static size_t do_format(substr buf, csubstr fmt, std::tuple<Types...> const& /*tp*/)
+    {
+        return to_chars(buf, fmt);
+    }
+
+    static size_t do_unformat(csubstr buf, csubstr fmt, std::tuple<Types...> const& /*tp*/)
+    {
+        return 0;
+    }
+};
+
+} // namespace detail
+
+template< class... Types >
+inline size_t cat(substr buf, std::tuple< Types... > const& tp)
+{
+    return detail::tuple_helper< 0, Types... >::do_cat(buf, tp);
+}
+
+template< class... Types >
+inline size_t uncat(csubstr buf, std::tuple< Types... > & tp)
+{
+    return detail::tuple_helper< 0, Types... >::do_uncat(buf, tp);
+}
+
+template< class Sep, class... Types >
+inline size_t catsep(substr buf, Sep const& sep, std::tuple< Types... > const& tp)
+{
+    size_t num = to_chars(buf, std::cref(std::get<0>(tp)));
+    buf  = buf.len >= num ? buf.sub(num) : substr{};
+    num += detail::tuple_helper< 1, Types... >::do_catsep_more(buf, sep, tp);
+    return num;
+}
+
+template< class Sep, class... Types >
+inline size_t uncatsep(csubstr buf, Sep & sep, std::tuple< Types... > & tp)
+{
+    size_t ret = from_str_trim(buf, &std::get<0>(tp)), num = ret;
+    if(ret == csubstr::npos) return csubstr::npos;
+    buf  = buf.len >= ret ? buf.sub(ret) : substr{};
+    ret  = detail::tuple_helper< 1, Types... >::do_uncatsep_more(buf, sep, tp);
+    if(ret == csubstr::npos) return csubstr::npos;
+    num += ret;
+    return num;
+}
+
+template< class... Types >
+inline size_t format(substr buf, csubstr fmt, std::tuple< Types... > const& tp)
+{
+    return detail::tuple_helper< 0, Types... >::do_format(buf, fmt, tp);
+}
+
+template< class... Types >
+inline size_t unformat(csubstr buf, csubstr fmt, std::tuple< Types... > & tp)
+{
+    return detail::tuple_helper< 0, Types... >::do_unformat(buf, fmt, tp);
+}
+#endif // C4_TUPLE_TO_CHARS
+
+} // namespace c4
+
+#endif /* _C4_STD_TUPLE_HPP_ */