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Diffstat (limited to 'include/jsoncons_ext/csv/decode_csv.hpp')
| -rw-r--r-- | include/jsoncons_ext/csv/decode_csv.hpp | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/include/jsoncons_ext/csv/decode_csv.hpp b/include/jsoncons_ext/csv/decode_csv.hpp new file mode 100644 index 0000000..b91c58b --- /dev/null +++ b/include/jsoncons_ext/csv/decode_csv.hpp @@ -0,0 +1,208 @@ +/// Copyright 2013 Daniel Parker +// Distributed under the Boost license, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + +// See https://github.com/danielaparker/jsoncons for latest version + +#ifndef JSONCONS_CSV_DECODE_CSV_HPP +#define JSONCONS_CSV_DECODE_CSV_HPP + +#include <jsoncons_ext/csv/csv_options.hpp> +#include <jsoncons_ext/csv/csv_reader.hpp> +#include <jsoncons_ext/csv/csv_encoder.hpp> +#include <jsoncons_ext/csv/csv_cursor.hpp> + +namespace jsoncons { +namespace csv { + + template <class T,class Source> + typename std::enable_if<type_traits::is_basic_json<T>::value && + type_traits::is_sequence_of<Source,typename T::char_type>::value,T>::type + decode_csv(const Source& s, const basic_csv_decode_options<typename Source::value_type>& options = basic_csv_decode_options<typename Source::value_type>()) + { + using char_type = typename Source::value_type; + + json_decoder<T> decoder; + + basic_csv_reader<char_type,jsoncons::string_source<char_type>> reader(s,decoder,options); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template <class T,class Source> + typename std::enable_if<!type_traits::is_basic_json<T>::value && + type_traits::is_char_sequence<Source>::value,T>::type + decode_csv(const Source& s, const basic_csv_decode_options<typename Source::value_type>& options = basic_csv_decode_options<typename Source::value_type>()) + { + using char_type = typename Source::value_type; + + basic_csv_cursor<char_type> cursor(s, options); + jsoncons::json_decoder<basic_json<char_type>> decoder; + + std::error_code ec; + T val = decode_traits<T,char_type>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + template <class T,class CharT> + typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type + decode_csv(std::basic_istream<CharT>& is, const basic_csv_decode_options<CharT>& options = basic_csv_decode_options<CharT>()) + { + using char_type = CharT; + + json_decoder<T> decoder; + + basic_csv_reader<char_type,jsoncons::stream_source<char_type>> reader(is,decoder,options); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template <class T,class CharT> + typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type + decode_csv(std::basic_istream<CharT>& is, const basic_csv_decode_options<CharT>& options = basic_csv_decode_options<CharT>()) + { + basic_csv_cursor<CharT> cursor(is, options); + jsoncons::json_decoder<basic_json<CharT>> decoder; + + std::error_code ec; + T val = decode_traits<T,CharT>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + template <class T, class InputIt> + typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type + decode_csv(InputIt first, InputIt last, + const basic_csv_decode_options<typename std::iterator_traits<InputIt>::value_type>& options = + basic_csv_decode_options<typename std::iterator_traits<InputIt>::value_type>()) + { + using char_type = typename std::iterator_traits<InputIt>::value_type; + + jsoncons::json_decoder<T> decoder; + basic_csv_reader<char_type, iterator_source<InputIt>> reader(iterator_source<InputIt>(first,last), decoder, options); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template <class T, class InputIt> + typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type + decode_csv(InputIt first, InputIt last, + const basic_csv_decode_options<typename std::iterator_traits<InputIt>::value_type>& options = + basic_csv_decode_options<typename std::iterator_traits<InputIt>::value_type>()) + { + using char_type = typename std::iterator_traits<InputIt>::value_type; + + basic_csv_cursor<char_type,iterator_source<InputIt>> cursor(iterator_source<InputIt>(first, last), options); + jsoncons::json_decoder<basic_json<char_type>> decoder; + std::error_code ec; + T val = decode_traits<T,char_type>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + // With leading allocator parameter + + template <class T,class Source,class TempAllocator> + typename std::enable_if<type_traits::is_basic_json<T>::value && + type_traits::is_sequence_of<Source,typename T::char_type>::value,T>::type + decode_csv(temp_allocator_arg_t, const TempAllocator& temp_alloc, + const Source& s, + const basic_csv_decode_options<typename Source::value_type>& options = basic_csv_decode_options<typename Source::value_type>()) + { + using char_type = typename Source::value_type; + + json_decoder<T,TempAllocator> decoder(temp_alloc); + + basic_csv_reader<char_type,jsoncons::string_source<char_type>,TempAllocator> reader(s,decoder,options,temp_alloc); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template <class T,class Source,class TempAllocator> + typename std::enable_if<!type_traits::is_basic_json<T>::value && + type_traits::is_char_sequence<Source>::value,T>::type + decode_csv(temp_allocator_arg_t, const TempAllocator& temp_alloc, + const Source& s, + const basic_csv_decode_options<typename Source::value_type>& options = basic_csv_decode_options<typename Source::value_type>()) + { + using char_type = typename Source::value_type; + + basic_csv_cursor<char_type,stream_source<char_type>,TempAllocator> cursor(s, options, temp_alloc); + json_decoder<basic_json<char_type,sorted_policy,TempAllocator>,TempAllocator> decoder(temp_alloc, temp_alloc); + + std::error_code ec; + T val = decode_traits<T,char_type>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + + template <class T,class CharT,class TempAllocator> + typename std::enable_if<type_traits::is_basic_json<T>::value,T>::type + decode_csv(temp_allocator_arg_t, const TempAllocator& temp_alloc, + std::basic_istream<CharT>& is, + const basic_csv_decode_options<CharT>& options = basic_csv_decode_options<CharT>()) + { + using char_type = CharT; + + json_decoder<T,TempAllocator> decoder(temp_alloc); + + basic_csv_reader<char_type,jsoncons::string_source<char_type>,TempAllocator> reader(is,decoder,options,temp_alloc); + reader.read(); + if (!decoder.is_valid()) + { + JSONCONS_THROW(ser_error(conv_errc::conversion_failed, reader.line(), reader.column())); + } + return decoder.get_result(); + } + + template <class T,class CharT,class TempAllocator> + typename std::enable_if<!type_traits::is_basic_json<T>::value,T>::type + decode_csv(temp_allocator_arg_t, const TempAllocator& temp_alloc, + std::basic_istream<CharT>& is, + const basic_csv_decode_options<CharT>& options = basic_csv_decode_options<CharT>()) + { + basic_csv_cursor<CharT,stream_source<CharT>,TempAllocator> cursor(is, options, temp_alloc); + json_decoder<basic_json<CharT,sorted_policy,TempAllocator>,TempAllocator> decoder(temp_alloc, temp_alloc); + + std::error_code ec; + T val = decode_traits<T,CharT>::decode(cursor, decoder, ec); + if (ec) + { + JSONCONS_THROW(ser_error(ec, cursor.context().line(), cursor.context().column())); + } + return val; + } + +} // namespace csv +} // namespace jsoncons + +#endif |