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+// Copyright 2007-2010 Baptiste Lepilleur
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_WRITER_H_INCLUDED
+#define JSON_WRITER_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "value.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+#include <vector>
+#include <string>
+
+// Disable warning C4251: <data member>: <type> needs to have dll-interface to
+// be used by...
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+#pragma warning(push)
+#pragma warning(disable : 4251)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+namespace Json {
+
+class Value;
+
+/** \brief Abstract class for writers.
+ */
+class JSON_API Writer {
+public:
+ virtual ~Writer();
+
+ virtual std::string write(const Value& root) = 0;
+};
+
+/** \brief Outputs a Value in <a HREF="http://www.json.org">JSON</a> format
+ *without formatting (not human friendly).
+ *
+ * The JSON document is written in a single line. It is not intended for 'human'
+ *consumption,
+ * but may be usefull to support feature such as RPC where bandwith is limited.
+ * \sa Reader, Value
+ */
+class JSON_API FastWriter : public Writer {
+public:
+ FastWriter();
+ virtual ~FastWriter() {}
+
+ void enableYAMLCompatibility();
+
+ /** \brief Drop the "null" string from the writer's output for nullValues.
+ * Strictly speaking, this is not valid JSON. But when the output is being
+ * fed to a browser's Javascript, it makes for smaller output and the
+ * browser can handle the output just fine.
+ */
+ void dropNullPlaceholders();
+
+ void omitEndingLineFeed();
+
+public: // overridden from Writer
+ virtual std::string write(const Value& root);
+
+private:
+ void writeValue(const Value& value);
+
+ std::string document_;
+ bool yamlCompatiblityEnabled_;
+ bool dropNullPlaceholders_;
+ bool omitEndingLineFeed_;
+};
+
+/** \brief Writes a Value in <a HREF="http://www.json.org">JSON</a> format in a
+ *human friendly way.
+ *
+ * The rules for line break and indent are as follow:
+ * - Object value:
+ * - if empty then print {} without indent and line break
+ * - if not empty the print '{', line break & indent, print one value per
+ *line
+ * and then unindent and line break and print '}'.
+ * - Array value:
+ * - if empty then print [] without indent and line break
+ * - if the array contains no object value, empty array or some other value
+ *types,
+ * and all the values fit on one lines, then print the array on a single
+ *line.
+ * - otherwise, it the values do not fit on one line, or the array contains
+ * object or non empty array, then print one value per line.
+ *
+ * If the Value have comments then they are outputed according to their
+ *#CommentPlacement.
+ *
+ * \sa Reader, Value, Value::setComment()
+ */
+class JSON_API StyledWriter : public Writer {
+public:
+ StyledWriter();
+ virtual ~StyledWriter() {}
+
+public: // overridden from Writer
+ /** \brief Serialize a Value in <a HREF="http://www.json.org">JSON</a> format.
+ * \param root Value to serialize.
+ * \return String containing the JSON document that represents the root value.
+ */
+ virtual std::string write(const Value& root);
+
+private:
+ void writeValue(const Value& value);
+ void writeArrayValue(const Value& value);
+ bool isMultineArray(const Value& value);
+ void pushValue(const std::string& value);
+ void writeIndent();
+ void writeWithIndent(const std::string& value);
+ void indent();
+ void unindent();
+ void writeCommentBeforeValue(const Value& root);
+ void writeCommentAfterValueOnSameLine(const Value& root);
+ bool hasCommentForValue(const Value& value);
+ static std::string normalizeEOL(const std::string& text);
+
+ typedef std::vector<std::string> ChildValues;
+
+ ChildValues childValues_;
+ std::string document_;
+ std::string indentString_;
+ int rightMargin_;
+ int indentSize_;
+ bool addChildValues_;
+};
+
+/** \brief Writes a Value in <a HREF="http://www.json.org">JSON</a> format in a
+ human friendly way,
+ to a stream rather than to a string.
+ *
+ * The rules for line break and indent are as follow:
+ * - Object value:
+ * - if empty then print {} without indent and line break
+ * - if not empty the print '{', line break & indent, print one value per
+ line
+ * and then unindent and line break and print '}'.
+ * - Array value:
+ * - if empty then print [] without indent and line break
+ * - if the array contains no object value, empty array or some other value
+ types,
+ * and all the values fit on one lines, then print the array on a single
+ line.
+ * - otherwise, it the values do not fit on one line, or the array contains
+ * object or non empty array, then print one value per line.
+ *
+ * If the Value have comments then they are outputed according to their
+ #CommentPlacement.
+ *
+ * \param indentation Each level will be indented by this amount extra.
+ * \sa Reader, Value, Value::setComment()
+ */
+class JSON_API StyledStreamWriter {
+public:
+ StyledStreamWriter(std::string indentation = "\t");
+ ~StyledStreamWriter() {}
+
+public:
+ /** \brief Serialize a Value in <a HREF="http://www.json.org">JSON</a> format.
+ * \param out Stream to write to. (Can be ostringstream, e.g.)
+ * \param root Value to serialize.
+ * \note There is no point in deriving from Writer, since write() should not
+ * return a value.
+ */
+ void write(std::ostream& out, const Value& root);
+
+private:
+ void writeValue(const Value& value);
+ void writeArrayValue(const Value& value);
+ bool isMultineArray(const Value& value);
+ void pushValue(const std::string& value);
+ void writeIndent();
+ void writeWithIndent(const std::string& value);
+ void indent();
+ void unindent();
+ void writeCommentBeforeValue(const Value& root);
+ void writeCommentAfterValueOnSameLine(const Value& root);
+ bool hasCommentForValue(const Value& value);
+ static std::string normalizeEOL(const std::string& text);
+
+ typedef std::vector<std::string> ChildValues;
+
+ ChildValues childValues_;
+ std::ostream* document_;
+ std::string indentString_;
+ int rightMargin_;
+ std::string indentation_;
+ bool addChildValues_;
+};
+
+#if defined(JSON_HAS_INT64)
+std::string JSON_API valueToString(Int value);
+std::string JSON_API valueToString(UInt value);
+#endif // if defined(JSON_HAS_INT64)
+std::string JSON_API valueToString(LargestInt value);
+std::string JSON_API valueToString(LargestUInt value);
+std::string JSON_API valueToString(double value);
+std::string JSON_API valueToString(bool value);
+std::string JSON_API valueToQuotedString(const char* value);
+
+/// \brief Output using the StyledStreamWriter.
+/// \see Json::operator>>()
+JSON_API std::ostream& operator<<(std::ostream&, const Value& root);
+
+} // namespace Json
+
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+#pragma warning(pop)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+#endif // JSON_WRITER_H_INCLUDED