68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
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// JSON condenser example
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// This example parses JSON from stdin with validation,
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// and re-output the JSON content to stdout with all string capitalized, and without whitespace.
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#include "rapidjson/reader.h"
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#include "rapidjson/writer.h"
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#include "rapidjson/filereadstream.h"
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#include "rapidjson/filewritestream.h"
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#include "rapidjson/error/en.h"
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#include <vector>
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#include <cctype>
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using namespace rapidjson;
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template<typename OutputHandler>
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struct CapitalizeFilter {
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CapitalizeFilter(OutputHandler& out) : out_(out), buffer_() {}
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bool Null() { return out_.Null(); }
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bool Bool(bool b) { return out_.Bool(b); }
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bool Int(int i) { return out_.Int(i); }
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bool Uint(unsigned u) { return out_.Uint(u); }
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bool Int64(int64_t i) { return out_.Int64(i); }
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bool Uint64(uint64_t u) { return out_.Uint64(u); }
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bool Double(double d) { return out_.Double(d); }
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bool RawNumber(const char* str, SizeType length, bool copy) { return out_.RawNumber(str, length, copy); }
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bool String(const char* str, SizeType length, bool) {
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buffer_.clear();
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for (SizeType i = 0; i < length; i++)
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buffer_.push_back(static_cast<char>(std::toupper(str[i])));
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return out_.String(&buffer_.front(), length, true); // true = output handler need to copy the string
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}
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bool StartObject() { return out_.StartObject(); }
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bool Key(const char* str, SizeType length, bool copy) { return String(str, length, copy); }
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bool EndObject(SizeType memberCount) { return out_.EndObject(memberCount); }
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bool StartArray() { return out_.StartArray(); }
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bool EndArray(SizeType elementCount) { return out_.EndArray(elementCount); }
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OutputHandler& out_;
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std::vector<char> buffer_;
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private:
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CapitalizeFilter(const CapitalizeFilter&);
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CapitalizeFilter& operator=(const CapitalizeFilter&);
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};
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int main(int, char*[]) {
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// Prepare JSON reader and input stream.
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Reader reader;
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char readBuffer[65536];
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FileReadStream is(stdin, readBuffer, sizeof(readBuffer));
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// Prepare JSON writer and output stream.
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char writeBuffer[65536];
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FileWriteStream os(stdout, writeBuffer, sizeof(writeBuffer));
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Writer<FileWriteStream> writer(os);
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// JSON reader parse from the input stream and let writer generate the output.
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CapitalizeFilter<Writer<FileWriteStream> > filter(writer);
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if (!reader.Parse(is, filter)) {
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fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode()));
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return 1;
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}
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return 0;
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}
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