Add the possibility of using FILE * from cstdio library to read a file. This enable the possibility of using low eand device with this library.
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@ -55,6 +55,7 @@ SOFTWARE.
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#include <memory> // allocator
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#include <string> // string
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#include <vector> // vector
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#include <cstdio>
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/*!
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@brief namespace for Niels Lohmann
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@ -2285,6 +2286,25 @@ struct wide_string_input_helper<WideStringType, 2>
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}
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};
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class file_input_adapter : public input_adapter_protocol
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{
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public:
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explicit file_input_adapter(const FILE *file) noexcept
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: file(file)
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{}
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std::char_traits<char>::int_type get_character() noexcept override
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{
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auto res = fgetc(const_cast<FILE *>(file));
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if(res == EOF)
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return std::char_traits<char>::eof();
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else
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return static_cast<std::char_traits<char>::int_type>(res);
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}
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private:
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/// the file pointer to read from
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const FILE * file;
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};
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template<typename WideStringType>
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class wide_string_input_adapter : public input_adapter_protocol
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{
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@ -2354,6 +2374,9 @@ class input_adapter
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input_adapter(const std::u32string& ws)
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: ia(std::make_shared<wide_string_input_adapter<std::u32string>>(ws)) {}
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input_adapter(const FILE *file)
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: ia(std::make_shared<file_input_adapter>(file)) {}
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/// input adapter for buffer
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template<typename CharT,
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typename std::enable_if<
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