diff options
Diffstat (limited to 'modules/codec/c++/csv.hpp')
| -rw-r--r-- | modules/codec/c++/csv.hpp | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/modules/codec/c++/csv.hpp b/modules/codec/c++/csv.hpp index 2d11bff..82010d7 100644 --- a/modules/codec/c++/csv.hpp +++ b/modules/codec/c++/csv.hpp @@ -12,6 +12,23 @@ struct Csv {}; } namespace impl { +struct csv_helper { + static bool is_whitespace(int8_t ch){ + /** + * @TODO supply relevant control characters for checks. + * Newlines are whitespace technically, but also control characters in CSV. + * Contrary to JSON for example. + */ + return ch == '\t' || ch == ' '; + } + + static void skip_whitespace(buffer_view& buff){ + while(buff.read_composite_length() > 0 && csv_helper::is_whitespace(buff.read())){ + buff.read_advance(1u); + } + } +}; + template<typename Schema, typename FromDecode> struct csv_encode { static_assert(always_false<Schema, FromDecode>, "Case not supported"); @@ -176,6 +193,33 @@ struct csv_encode<schema::Primitive<T,N>, FromDecode> { return make_void(); } }; + +template<typename Schema, typename FromDecode> +struct csv_decode { + static_assert(always_false<Schema, FromDecode>, "Case not supported"); +}; + +template<typename T, size_t Dim, typename FromDecode> +struct csv_decode<schema::Array<T,Dim>, FromDecode> { + static_assert(Dim == 1, "Only one dimension is allowed."); + static_assert(!is_array<T>::value, "Array of an array is not allowed."); + static_assert(is_tuple<T>::value || is_struct<T>::value, "Only struct or tuples allowed inside a csv array"); + + using Schema = schema::Array<T,Dim>; + + static error_or<void> decode(data<Schema, encode::Csv>& from, data<Schema, FromDecode>& to){ + buffer_view view{from.get_buffer()}; + if constexpr (is_struct<T>::value) { + auto eov = csv_decode<T, FromDecode>::check_header(view); + if(eov.is_error()){ + return eov; + } + } + + uint64_t len{}; + return make_error<err::not_implemented>(); + } +}; } template<typename Schema> |