1 // JSON condenser example
3 // This example parses JSON from stdin with validation,
4 // and re-output the JSON content to stdout with all string capitalized, and without whitespace.
6 #include "rapidjson/reader.h"
7 #include "rapidjson/writer.h"
8 #include "rapidjson/filereadstream.h"
9 #include "rapidjson/filewritestream.h"
10 #include "rapidjson/error/en.h"
14 using namespace rapidjson;
16 template<typename OutputHandler>
17 struct CapitalizeFilter {
18 CapitalizeFilter(OutputHandler& out) : out_(out), buffer_() {}
20 bool Null() { return out_.Null(); }
21 bool Bool(bool b) { return out_.Bool(b); }
22 bool Int(int i) { return out_.Int(i); }
23 bool Uint(unsigned u) { return out_.Uint(u); }
24 bool Int64(int64_t i) { return out_.Int64(i); }
25 bool Uint64(uint64_t u) { return out_.Uint64(u); }
26 bool Double(double d) { return out_.Double(d); }
27 bool RawNumber(const char* str, SizeType length, bool copy) { return out_.RawNumber(str, length, copy); }
28 bool String(const char* str, SizeType length, bool) {
30 for (SizeType i = 0; i < length; i++)
31 buffer_.push_back(static_cast<char>(std::toupper(str[i])));
32 return out_.String(&buffer_.front(), length, true); // true = output handler need to copy the string
34 bool StartObject() { return out_.StartObject(); }
35 bool Key(const char* str, SizeType length, bool copy) { return String(str, length, copy); }
36 bool EndObject(SizeType memberCount) { return out_.EndObject(memberCount); }
37 bool StartArray() { return out_.StartArray(); }
38 bool EndArray(SizeType elementCount) { return out_.EndArray(elementCount); }
41 std::vector<char> buffer_;
44 CapitalizeFilter(const CapitalizeFilter&);
45 CapitalizeFilter& operator=(const CapitalizeFilter&);
48 int main(int, char*[]) {
49 // Prepare JSON reader and input stream.
51 char readBuffer[65536];
52 FileReadStream is(stdin, readBuffer, sizeof(readBuffer));
54 // Prepare JSON writer and output stream.
55 char writeBuffer[65536];
56 FileWriteStream os(stdout, writeBuffer, sizeof(writeBuffer));
57 Writer<FileWriteStream> writer(os);
59 // JSON reader parse from the input stream and let writer generate the output.
60 CapitalizeFilter<Writer<FileWriteStream> > filter(writer);
61 if (!reader.Parse(is, filter)) {
62 fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode()));