Add capitalize example

example/capitalize/capitalize.cpp

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