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json test
Diff: jsoncpp/src/lib_json/json_writer.cpp
- Revision:
- 0:2ee762ea11b3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jsoncpp/src/lib_json/json_writer.cpp Fri Jan 26 06:05:31 2018 +0000 @@ -0,0 +1,1233 @@ +// Copyright 2011 Baptiste Lepilleur and The JsonCpp Authors +// 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 + +#if !defined(JSON_IS_AMALGAMATION) +#include <json/writer.h> +#include "json_tool.h" +#endif // if !defined(JSON_IS_AMALGAMATION) +#include <iomanip> +#include <memory> +#include <sstream> +#include <utility> +#include <set> +#include <cassert> +#include <cstring> +#include <cstdio> + +#if defined(_MSC_VER) && _MSC_VER >= 1200 && _MSC_VER < 1800 // Between VC++ 6.0 and VC++ 11.0 +#include <float.h> +#define isfinite _finite +#elif defined(__sun) && defined(__SVR4) //Solaris +#if !defined(isfinite) +#include <ieeefp.h> +#define isfinite finite +#endif +#elif defined(_AIX) +#if !defined(isfinite) +#include <math.h> +#define isfinite finite +#endif +#elif defined(__hpux) +#if !defined(isfinite) +#if defined(__ia64) && !defined(finite) +#define isfinite(x) ((sizeof(x) == sizeof(float) ? \ + _Isfinitef(x) : _IsFinite(x))) +#else +#include <math.h> +#define isfinite finite +#endif +#endif +#else +#include <cmath> +#if !(defined(__QNXNTO__)) // QNX already defines isfinite +#define isfinite std::isfinite +#endif +#endif + +#if defined(_MSC_VER) +#if !defined(WINCE) && defined(__STDC_SECURE_LIB__) && _MSC_VER >= 1500 // VC++ 9.0 and above +#define snprintf sprintf_s +#elif _MSC_VER >= 1900 // VC++ 14.0 and above +#define snprintf std::snprintf +#else +#define snprintf _snprintf +#endif +#elif defined(__ANDROID__) || defined(__QNXNTO__) +#define snprintf snprintf +#elif __cplusplus >= 201103L +#if !defined(__MINGW32__) && !defined(__CYGWIN__) +#define snprintf std::snprintf +#endif +#endif + +#if defined(__BORLANDC__) +#include <float.h> +#define isfinite _finite +#define snprintf _snprintf +#endif + +#if defined(_MSC_VER) && _MSC_VER >= 1400 // VC++ 8.0 +// Disable warning about strdup being deprecated. +#pragma warning(disable : 4996) +#endif +using namespace std; +namespace Json { + +#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520) +typedef std::unique_ptr<StreamWriter> StreamWriterPtr; +#else +typedef std::auto_ptr<StreamWriter> StreamWriterPtr; +#endif + +JSONCPP_STRING valueToString(LargestInt value) { + UIntToStringBuffer buffer; + char* current = buffer + sizeof(buffer); + if (value == Value::minLargestInt) { + uintToString(LargestUInt(Value::maxLargestInt) + 1, current); + *--current = '-'; + } else if (value < 0) { + uintToString(LargestUInt(-value), current); + *--current = '-'; + } else { + uintToString(LargestUInt(value), current); + } + assert(current >= buffer); + return current; +} + +JSONCPP_STRING valueToString(LargestUInt value) { + UIntToStringBuffer buffer; + char* current = buffer + sizeof(buffer); + uintToString(value, current); + assert(current >= buffer); + return current; +} + +#if defined(JSON_HAS_INT64) + +JSONCPP_STRING valueToString(Int value) { + return valueToString(LargestInt(value)); +} + +JSONCPP_STRING valueToString(UInt value) { + return valueToString(LargestUInt(value)); +} + +#endif // # if defined(JSON_HAS_INT64) + +namespace { +JSONCPP_STRING valueToString(double value, bool useSpecialFloats, unsigned int precision) { + // Allocate a buffer that is more than large enough to store the 16 digits of + // precision requested below. + char buffer[36]; + int len = -1; + + char formatString[15]; + snprintf(formatString, sizeof(formatString), "%%.%ug", precision); + + // Print into the buffer. We need not request the alternative representation + // that always has a decimal point because JSON doesn't distinguish the + // concepts of reals and integers. + if (isfinite(value)) { + len = snprintf(buffer, sizeof(buffer), formatString, value); + fixNumericLocale(buffer, buffer + len); + + // try to ensure we preserve the fact that this was given to us as a double on input + if (!strchr(buffer, '.') && !strchr(buffer, 'e')) { + strcat(buffer, ".0"); + } + + } else { + // IEEE standard states that NaN values will not compare to themselves + if (value != value) { + len = snprintf(buffer, sizeof(buffer), useSpecialFloats ? "NaN" : "null"); + } else if (value < 0) { + len = snprintf(buffer, sizeof(buffer), useSpecialFloats ? "-Infinity" : "-1e+9999"); + } else { + len = snprintf(buffer, sizeof(buffer), useSpecialFloats ? "Infinity" : "1e+9999"); + } + } + assert(len >= 0); + return buffer; +} +} + +JSONCPP_STRING valueToString(double value) { return valueToString(value, false, 17); } + +JSONCPP_STRING valueToString(bool value) { return value ? "true" : "false"; } + +static bool isAnyCharRequiredQuoting(char const* s, size_t n) { + assert(s || !n); + + char const* const end = s + n; + for (char const* cur = s; cur < end; ++cur) { + if (*cur == '\\' || *cur == '\"' || *cur < ' ' + || static_cast<unsigned char>(*cur) < 0x80) + return true; + } + return false; +} + +static unsigned int utf8ToCodepoint(const char*& s, const char* e) { + const unsigned int REPLACEMENT_CHARACTER = 0xFFFD; + + unsigned int firstByte = static_cast<unsigned char>(*s); + + if (firstByte < 0x80) + return firstByte; + + if (firstByte < 0xE0) { + if (e - s < 2) + return REPLACEMENT_CHARACTER; + + unsigned int calculated = ((firstByte & 0x1F) << 6) + | (static_cast<unsigned int>(s[1]) & 0x3F); + s += 1; + // oversized encoded characters are invalid + return calculated < 0x80 ? REPLACEMENT_CHARACTER : calculated; + } + + if (firstByte < 0xF0) { + if (e - s < 3) + return REPLACEMENT_CHARACTER; + + unsigned int calculated = ((firstByte & 0x0F) << 12) + | ((static_cast<unsigned int>(s[1]) & 0x3F) << 6) + | (static_cast<unsigned int>(s[2]) & 0x3F); + s += 2; + // surrogates aren't valid codepoints itself + // shouldn't be UTF-8 encoded + if (calculated >= 0xD800 && calculated <= 0xDFFF) + return REPLACEMENT_CHARACTER; + // oversized encoded characters are invalid + return calculated < 0x800 ? REPLACEMENT_CHARACTER : calculated; + } + + if (firstByte < 0xF8) { + if (e - s < 4) + return REPLACEMENT_CHARACTER; + + unsigned int calculated = ((firstByte & 0x07) << 24) + | ((static_cast<unsigned int>(s[1]) & 0x3F) << 12) + | ((static_cast<unsigned int>(s[2]) & 0x3F) << 6) + | (static_cast<unsigned int>(s[3]) & 0x3F); + s += 3; + // oversized encoded characters are invalid + return calculated < 0x10000 ? REPLACEMENT_CHARACTER : calculated; + } + + return REPLACEMENT_CHARACTER; +} + +static const char hex2[] = + "000102030405060708090a0b0c0d0e0f" + "101112131415161718191a1b1c1d1e1f" + "202122232425262728292a2b2c2d2e2f" + "303132333435363738393a3b3c3d3e3f" + "404142434445464748494a4b4c4d4e4f" + "505152535455565758595a5b5c5d5e5f" + "606162636465666768696a6b6c6d6e6f" + "707172737475767778797a7b7c7d7e7f" + "808182838485868788898a8b8c8d8e8f" + "909192939495969798999a9b9c9d9e9f" + "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf" + "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf" + "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf" + "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf" + "e0e1e2e3e4e5e6e7e8e9eaebecedeeef" + "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"; + +static JSONCPP_STRING toHex16Bit(unsigned int x) { + const unsigned int hi = (x >> 8) & 0xff; + const unsigned int lo = x & 0xff; + JSONCPP_STRING result(4, ' '); + result[0] = hex2[2 * hi]; + result[1] = hex2[2 * hi + 1]; + result[2] = hex2[2 * lo]; + result[3] = hex2[2 * lo + 1]; + return result; +} + +static JSONCPP_STRING valueToQuotedStringN(const char* value, unsigned length) { + if (value == NULL) + return ""; + + if (!isAnyCharRequiredQuoting(value, length)) + return JSONCPP_STRING("\"") + value + "\""; + // We have to walk value and escape any special characters. + // Appending to JSONCPP_STRING is not efficient, but this should be rare. + // (Note: forward slashes are *not* rare, but I am not escaping them.) + JSONCPP_STRING::size_type maxsize = + length * 2 + 3; // allescaped+quotes+NULL + JSONCPP_STRING result; + result.reserve(maxsize); // to avoid lots of mallocs + result += "\""; + char const* end = value + length; + for (const char* c = value; c != end; ++c) { + switch (*c) { + case '\"': + result += "\\\""; + break; + case '\\': + result += "\\\\"; + break; + case '\b': + result += "\\b"; + break; + case '\f': + result += "\\f"; + break; + case '\n': + result += "\\n"; + break; + case '\r': + result += "\\r"; + break; + case '\t': + result += "\\t"; + break; + // case '/': + // Even though \/ is considered a legal escape in JSON, a bare + // slash is also legal, so I see no reason to escape it. + // (I hope I am not misunderstanding something.) + // blep notes: actually escaping \/ may be useful in javascript to avoid </ + // sequence. + // Should add a flag to allow this compatibility mode and prevent this + // sequence from occurring. + default: { + unsigned int cp = utf8ToCodepoint(c, end); + // don't escape non-control characters + // (short escape sequence are applied above) + if (cp < 0x80 && cp >= 0x20) + result += static_cast<char>(cp); + else if (cp < 0x10000) { // codepoint is in Basic Multilingual Plane + result += "\\u"; + result += toHex16Bit(cp); + } + else { // codepoint is not in Basic Multilingual Plane + // convert to surrogate pair first + cp -= 0x10000; + result += "\\u"; + result += toHex16Bit((cp >> 10) + 0xD800); + result += "\\u"; + result += toHex16Bit((cp & 0x3FF) + 0xDC00); + } + } + break; + } + } + result += "\""; + return result; +} + +JSONCPP_STRING valueToQuotedString(const char* value) { + return valueToQuotedStringN(value, static_cast<unsigned int>(strlen(value))); +} + +// Class Writer +// ////////////////////////////////////////////////////////////////// +Writer::~Writer() {} + +// Class FastWriter +// ////////////////////////////////////////////////////////////////// + +FastWriter::FastWriter() + : yamlCompatibilityEnabled_(false), dropNullPlaceholders_(false), + omitEndingLineFeed_(false) {} + +void FastWriter::enableYAMLCompatibility() { yamlCompatibilityEnabled_ = true; } + +void FastWriter::dropNullPlaceholders() { dropNullPlaceholders_ = true; } + +void FastWriter::omitEndingLineFeed() { omitEndingLineFeed_ = true; } + +JSONCPP_STRING FastWriter::write(const Value& root) { + document_.clear(); + writeValue(root); + if (!omitEndingLineFeed_) + document_ += "\n"; + return document_; +} + +void FastWriter::writeValue(const Value& value) { + switch (value.type()) { + case nullValue: + if (!dropNullPlaceholders_) + document_ += "null"; + break; + case intValue: + document_ += valueToString(value.asLargestInt()); + break; + case uintValue: + document_ += valueToString(value.asLargestUInt()); + break; + case realValue: + document_ += valueToString(value.asDouble()); + break; + case stringValue: + { + // Is NULL possible for value.string_? No. + char const* str; + char const* end; + bool ok = value.getString(&str, &end); + if (ok) document_ += valueToQuotedStringN(str, static_cast<unsigned>(end-str)); + break; + } + case booleanValue: + document_ += valueToString(value.asBool()); + break; + case arrayValue: { + document_ += '['; + ArrayIndex size = value.size(); + for (ArrayIndex index = 0; index < size; ++index) { + if (index > 0) + document_ += ','; + writeValue(value[index]); + } + document_ += ']'; + } break; + case objectValue: { + Value::Members members(value.getMemberNames()); + document_ += '{'; + for (Value::Members::iterator it = members.begin(); it != members.end(); + ++it) { + const JSONCPP_STRING& name = *it; + if (it != members.begin()) + document_ += ','; + document_ += valueToQuotedStringN(name.data(), static_cast<unsigned>(name.length())); + document_ += yamlCompatibilityEnabled_ ? ": " : ":"; + writeValue(value[name]); + } + document_ += '}'; + } break; + } +} + +// Class StyledWriter +// ////////////////////////////////////////////////////////////////// + +StyledWriter::StyledWriter() + : rightMargin_(74), indentSize_(3), addChildValues_() {} + +JSONCPP_STRING StyledWriter::write(const Value& root) { + document_.clear(); + addChildValues_ = false; + indentString_.clear(); + writeCommentBeforeValue(root); + writeValue(root); + writeCommentAfterValueOnSameLine(root); + document_ += "\n"; + return document_; +} + +void StyledWriter::writeValue(const Value& value) { + switch (value.type()) { + case nullValue: + pushValue("null"); + break; + case intValue: + pushValue(valueToString(value.asLargestInt())); + break; + case uintValue: + pushValue(valueToString(value.asLargestUInt())); + break; + case realValue: + pushValue(valueToString(value.asDouble())); + break; + case stringValue: + { + // Is NULL possible for value.string_? No. + char const* str; + char const* end; + bool ok = value.getString(&str, &end); + if (ok) pushValue(valueToQuotedStringN(str, static_cast<unsigned>(end-str))); + else pushValue(""); + break; + } + case booleanValue: + pushValue(valueToString(value.asBool())); + break; + case arrayValue: + writeArrayValue(value); + break; + case objectValue: { + Value::Members members(value.getMemberNames()); + if (members.empty()) + pushValue("{}"); + else { + writeWithIndent("{"); + indent(); + Value::Members::iterator it = members.begin(); + for (;;) { + const JSONCPP_STRING& name = *it; + const Value& childValue = value[name]; + writeCommentBeforeValue(childValue); + writeWithIndent(valueToQuotedString(name.c_str())); + document_ += " : "; + writeValue(childValue); + if (++it == members.end()) { + writeCommentAfterValueOnSameLine(childValue); + break; + } + document_ += ','; + writeCommentAfterValueOnSameLine(childValue); + } + unindent(); + writeWithIndent("}"); + } + } break; + } +} + +void StyledWriter::writeArrayValue(const Value& value) { + unsigned size = value.size(); + if (size == 0) + pushValue("[]"); + else { + bool isArrayMultiLine = isMultilineArray(value); + if (isArrayMultiLine) { + writeWithIndent("["); + indent(); + bool hasChildValue = !childValues_.empty(); + unsigned index = 0; + for (;;) { + const Value& childValue = value[index]; + writeCommentBeforeValue(childValue); + if (hasChildValue) + writeWithIndent(childValues_[index]); + else { + writeIndent(); + writeValue(childValue); + } + if (++index == size) { + writeCommentAfterValueOnSameLine(childValue); + break; + } + document_ += ','; + writeCommentAfterValueOnSameLine(childValue); + } + unindent(); + writeWithIndent("]"); + } else // output on a single line + { + assert(childValues_.size() == size); + document_ += "[ "; + for (unsigned index = 0; index < size; ++index) { + if (index > 0) + document_ += ", "; + document_ += childValues_[index]; + } + document_ += " ]"; + } + } +} + +bool StyledWriter::isMultilineArray(const Value& value) { + ArrayIndex const size = value.size(); + bool isMultiLine = size * 3 >= rightMargin_; + childValues_.clear(); + for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) { + const Value& childValue = value[index]; + isMultiLine = ((childValue.isArray() || childValue.isObject()) && + childValue.size() > 0); + } + if (!isMultiLine) // check if line length > max line length + { + childValues_.reserve(size); + addChildValues_ = true; + ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]' + for (ArrayIndex index = 0; index < size; ++index) { + if (hasCommentForValue(value[index])) { + isMultiLine = true; + } + writeValue(value[index]); + lineLength += static_cast<ArrayIndex>(childValues_[index].length()); + } + addChildValues_ = false; + isMultiLine = isMultiLine || lineLength >= rightMargin_; + } + return isMultiLine; +} + +void StyledWriter::pushValue(const JSONCPP_STRING& value) { + if (addChildValues_) + childValues_.push_back(value); + else + document_ += value; +} + +void StyledWriter::writeIndent() { + if (!document_.empty()) { + char last = document_[document_.length() - 1]; + if (last == ' ') // already indented + return; + if (last != '\n') // Comments may add new-line + document_ += '\n'; + } + document_ += indentString_; +} + +void StyledWriter::writeWithIndent(const JSONCPP_STRING& value) { + writeIndent(); + document_ += value; +} + +void StyledWriter::indent() { indentString_ += JSONCPP_STRING(indentSize_, ' '); } + +void StyledWriter::unindent() { + assert(indentString_.size() >= indentSize_); + indentString_.resize(indentString_.size() - indentSize_); +} + +void StyledWriter::writeCommentBeforeValue(const Value& root) { + if (!root.hasComment(commentBefore)) + return; + + document_ += "\n"; + writeIndent(); + const JSONCPP_STRING& comment = root.getComment(commentBefore); + JSONCPP_STRING::const_iterator iter = comment.begin(); + while (iter != comment.end()) { + document_ += *iter; + if (*iter == '\n' && + ((iter+1) != comment.end() && *(iter + 1) == '/')) + writeIndent(); + ++iter; + } + + // Comments are stripped of trailing newlines, so add one here + document_ += "\n"; +} + +void StyledWriter::writeCommentAfterValueOnSameLine(const Value& root) { + if (root.hasComment(commentAfterOnSameLine)) + document_ += " " + root.getComment(commentAfterOnSameLine); + + if (root.hasComment(commentAfter)) { + document_ += "\n"; + document_ += root.getComment(commentAfter); + document_ += "\n"; + } +} + +bool StyledWriter::hasCommentForValue(const Value& value) { + return value.hasComment(commentBefore) || + value.hasComment(commentAfterOnSameLine) || + value.hasComment(commentAfter); +} + +// Class StyledStreamWriter +// ////////////////////////////////////////////////////////////////// + +StyledStreamWriter::StyledStreamWriter(JSONCPP_STRING indentation) + : document_(NULL), rightMargin_(74), indentation_(indentation), + addChildValues_() {} + +void StyledStreamWriter::write(JSONCPP_OSTREAM& out, const Value& root) { + document_ = &out; + addChildValues_ = false; + indentString_.clear(); + indented_ = true; + writeCommentBeforeValue(root); + if (!indented_) writeIndent(); + indented_ = true; + writeValue(root); + writeCommentAfterValueOnSameLine(root); + *document_ << "\n"; + document_ = NULL; // Forget the stream, for safety. +} + +void StyledStreamWriter::writeValue(const Value& value) { + switch (value.type()) { + case nullValue: + pushValue("null"); + break; + case intValue: + pushValue(valueToString(value.asLargestInt())); + break; + case uintValue: + pushValue(valueToString(value.asLargestUInt())); + break; + case realValue: + pushValue(valueToString(value.asDouble())); + break; + case stringValue: + { + // Is NULL possible for value.string_? No. + char const* str; + char const* end; + bool ok = value.getString(&str, &end); + if (ok) pushValue(valueToQuotedStringN(str, static_cast<unsigned>(end-str))); + else pushValue(""); + break; + } + case booleanValue: + pushValue(valueToString(value.asBool())); + break; + case arrayValue: + writeArrayValue(value); + break; + case objectValue: { + Value::Members members(value.getMemberNames()); + if (members.empty()) + pushValue("{}"); + else { + writeWithIndent("{"); + indent(); + Value::Members::iterator it = members.begin(); + for (;;) { + const JSONCPP_STRING& name = *it; + const Value& childValue = value[name]; + writeCommentBeforeValue(childValue); + writeWithIndent(valueToQuotedString(name.c_str())); + *document_ << " : "; + writeValue(childValue); + if (++it == members.end()) { + writeCommentAfterValueOnSameLine(childValue); + break; + } + *document_ << ","; + writeCommentAfterValueOnSameLine(childValue); + } + unindent(); + writeWithIndent("}"); + } + } break; + } +} + +void StyledStreamWriter::writeArrayValue(const Value& value) { + unsigned size = value.size(); + if (size == 0) + pushValue("[]"); + else { + bool isArrayMultiLine = isMultilineArray(value); + if (isArrayMultiLine) { + writeWithIndent("["); + indent(); + bool hasChildValue = !childValues_.empty(); + unsigned index = 0; + for (;;) { + const Value& childValue = value[index]; + writeCommentBeforeValue(childValue); + if (hasChildValue) + writeWithIndent(childValues_[index]); + else { + if (!indented_) writeIndent(); + indented_ = true; + writeValue(childValue); + indented_ = false; + } + if (++index == size) { + writeCommentAfterValueOnSameLine(childValue); + break; + } + *document_ << ","; + writeCommentAfterValueOnSameLine(childValue); + } + unindent(); + writeWithIndent("]"); + } else // output on a single line + { + assert(childValues_.size() == size); + *document_ << "[ "; + for (unsigned index = 0; index < size; ++index) { + if (index > 0) + *document_ << ", "; + *document_ << childValues_[index]; + } + *document_ << " ]"; + } + } +} + +bool StyledStreamWriter::isMultilineArray(const Value& value) { + ArrayIndex const size = value.size(); + bool isMultiLine = size * 3 >= rightMargin_; + childValues_.clear(); + for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) { + const Value& childValue = value[index]; + isMultiLine = ((childValue.isArray() || childValue.isObject()) && + childValue.size() > 0); + } + if (!isMultiLine) // check if line length > max line length + { + childValues_.reserve(size); + addChildValues_ = true; + ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]' + for (ArrayIndex index = 0; index < size; ++index) { + if (hasCommentForValue(value[index])) { + isMultiLine = true; + } + writeValue(value[index]); + lineLength += static_cast<ArrayIndex>(childValues_[index].length()); + } + addChildValues_ = false; + isMultiLine = isMultiLine || lineLength >= rightMargin_; + } + return isMultiLine; +} + +void StyledStreamWriter::pushValue(const JSONCPP_STRING& value) { + if (addChildValues_) + childValues_.push_back(value); + else + *document_ << value; +} + +void StyledStreamWriter::writeIndent() { + // blep intended this to look at the so-far-written string + // to determine whether we are already indented, but + // with a stream we cannot do that. So we rely on some saved state. + // The caller checks indented_. + *document_ << '\n' << indentString_; +} + +void StyledStreamWriter::writeWithIndent(const JSONCPP_STRING& value) { + if (!indented_) writeIndent(); + *document_ << value; + indented_ = false; +} + +void StyledStreamWriter::indent() { indentString_ += indentation_; } + +void StyledStreamWriter::unindent() { + assert(indentString_.size() >= indentation_.size()); + indentString_.resize(indentString_.size() - indentation_.size()); +} + +void StyledStreamWriter::writeCommentBeforeValue(const Value& root) { + if (!root.hasComment(commentBefore)) + return; + + if (!indented_) writeIndent(); + const JSONCPP_STRING& comment = root.getComment(commentBefore); + JSONCPP_STRING::const_iterator iter = comment.begin(); + while (iter != comment.end()) { + *document_ << *iter; + if (*iter == '\n' && + ((iter+1) != comment.end() && *(iter + 1) == '/')) + // writeIndent(); // would include newline + *document_ << indentString_; + ++iter; + } + indented_ = false; +} + +void StyledStreamWriter::writeCommentAfterValueOnSameLine(const Value& root) { + if (root.hasComment(commentAfterOnSameLine)) + *document_ << ' ' << root.getComment(commentAfterOnSameLine); + + if (root.hasComment(commentAfter)) { + writeIndent(); + *document_ << root.getComment(commentAfter); + } + indented_ = false; +} + +bool StyledStreamWriter::hasCommentForValue(const Value& value) { + return value.hasComment(commentBefore) || + value.hasComment(commentAfterOnSameLine) || + value.hasComment(commentAfter); +} + +////////////////////////// +// BuiltStyledStreamWriter + +/// Scoped enums are not available until C++11. +struct CommentStyle { + /// Decide whether to write comments. + enum Enum { + None, ///< Drop all comments. + Most, ///< Recover odd behavior of previous versions (not implemented yet). + All ///< Keep all comments. + }; +}; + +struct BuiltStyledStreamWriter : public StreamWriter +{ + BuiltStyledStreamWriter( + JSONCPP_STRING const& indentation, + CommentStyle::Enum cs, + JSONCPP_STRING const& colonSymbol, + JSONCPP_STRING const& nullSymbol, + JSONCPP_STRING const& endingLineFeedSymbol, + bool useSpecialFloats, + unsigned int precision); + int write(Value const& root, JSONCPP_OSTREAM* sout) JSONCPP_OVERRIDE; +private: + void writeValue(Value const& value); + void writeArrayValue(Value const& value); + bool isMultilineArray(Value const& value); + void pushValue(JSONCPP_STRING const& value); + void writeIndent(); + void writeWithIndent(JSONCPP_STRING const& value); + void indent(); + void unindent(); + void writeCommentBeforeValue(Value const& root); + void writeCommentAfterValueOnSameLine(Value const& root); + static bool hasCommentForValue(const Value& value); + + typedef std::vector<JSONCPP_STRING> ChildValues; + + ChildValues childValues_; + JSONCPP_STRING indentString_; + unsigned int rightMargin_; + JSONCPP_STRING indentation_; + CommentStyle::Enum cs_; + JSONCPP_STRING colonSymbol_; + JSONCPP_STRING nullSymbol_; + JSONCPP_STRING endingLineFeedSymbol_; + bool addChildValues_ : 1; + bool indented_ : 1; + bool useSpecialFloats_ : 1; + unsigned int precision_; +}; +BuiltStyledStreamWriter::BuiltStyledStreamWriter( + JSONCPP_STRING const& indentation, + CommentStyle::Enum cs, + JSONCPP_STRING const& colonSymbol, + JSONCPP_STRING const& nullSymbol, + JSONCPP_STRING const& endingLineFeedSymbol, + bool useSpecialFloats, + unsigned int precision) + : rightMargin_(74) + , indentation_(indentation) + , cs_(cs) + , colonSymbol_(colonSymbol) + , nullSymbol_(nullSymbol) + , endingLineFeedSymbol_(endingLineFeedSymbol) + , addChildValues_(false) + , indented_(false) + , useSpecialFloats_(useSpecialFloats) + , precision_(precision) +{ +} +int BuiltStyledStreamWriter::write(Value const& root, JSONCPP_OSTREAM* sout) +{ + sout_ = sout; + addChildValues_ = false; + indented_ = true; + indentString_.clear(); + writeCommentBeforeValue(root); + if (!indented_) writeIndent(); + indented_ = true; + writeValue(root); + writeCommentAfterValueOnSameLine(root); + *sout_ << endingLineFeedSymbol_; + sout_ = NULL; + return 0; +} +void BuiltStyledStreamWriter::writeValue(Value const& value) { + switch (value.type()) { + case nullValue: + pushValue(nullSymbol_); + break; + case intValue: + pushValue(valueToString(value.asLargestInt())); + break; + case uintValue: + pushValue(valueToString(value.asLargestUInt())); + break; + case realValue: + pushValue(valueToString(value.asDouble(), useSpecialFloats_, precision_)); + break; + case stringValue: + { + // Is NULL is possible for value.string_? No. + char const* str; + char const* end; + bool ok = value.getString(&str, &end); + if (ok) pushValue(valueToQuotedStringN(str, static_cast<unsigned>(end-str))); + else pushValue(""); + break; + } + case booleanValue: + pushValue(valueToString(value.asBool())); + break; + case arrayValue: + writeArrayValue(value); + break; + case objectValue: { + Value::Members members(value.getMemberNames()); + if (members.empty()) + pushValue("{}"); + else { + writeWithIndent("{"); + indent(); + Value::Members::iterator it = members.begin(); + for (;;) { + JSONCPP_STRING const& name = *it; + Value const& childValue = value[name]; + writeCommentBeforeValue(childValue); + writeWithIndent(valueToQuotedStringN(name.data(), static_cast<unsigned>(name.length()))); + *sout_ << colonSymbol_; + writeValue(childValue); + if (++it == members.end()) { + writeCommentAfterValueOnSameLine(childValue); + break; + } + *sout_ << ","; + writeCommentAfterValueOnSameLine(childValue); + } + unindent(); + writeWithIndent("}"); + } + } break; + } +} + +void BuiltStyledStreamWriter::writeArrayValue(Value const& value) { + unsigned size = value.size(); + if (size == 0) + pushValue("[]"); + else { + bool isMultiLine = (cs_ == CommentStyle::All) || isMultilineArray(value); + if (isMultiLine) { + writeWithIndent("["); + indent(); + bool hasChildValue = !childValues_.empty(); + unsigned index = 0; + for (;;) { + Value const& childValue = value[index]; + writeCommentBeforeValue(childValue); + if (hasChildValue) + writeWithIndent(childValues_[index]); + else { + if (!indented_) writeIndent(); + indented_ = true; + writeValue(childValue); + indented_ = false; + } + if (++index == size) { + writeCommentAfterValueOnSameLine(childValue); + break; + } + *sout_ << ","; + writeCommentAfterValueOnSameLine(childValue); + } + unindent(); + writeWithIndent("]"); + } else // output on a single line + { + assert(childValues_.size() == size); + *sout_ << "["; + if (!indentation_.empty()) *sout_ << " "; + for (unsigned index = 0; index < size; ++index) { + if (index > 0) + *sout_ << ((!indentation_.empty()) ? ", " : ","); + *sout_ << childValues_[index]; + } + if (!indentation_.empty()) *sout_ << " "; + *sout_ << "]"; + } + } +} + +bool BuiltStyledStreamWriter::isMultilineArray(Value const& value) { + ArrayIndex const size = value.size(); + bool isMultiLine = size * 3 >= rightMargin_; + childValues_.clear(); + for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) { + Value const& childValue = value[index]; + isMultiLine = ((childValue.isArray() || childValue.isObject()) && + childValue.size() > 0); + } + if (!isMultiLine) // check if line length > max line length + { + childValues_.reserve(size); + addChildValues_ = true; + ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]' + for (ArrayIndex index = 0; index < size; ++index) { + if (hasCommentForValue(value[index])) { + isMultiLine = true; + } + writeValue(value[index]); + lineLength += static_cast<ArrayIndex>(childValues_[index].length()); + } + addChildValues_ = false; + isMultiLine = isMultiLine || lineLength >= rightMargin_; + } + return isMultiLine; +} + +void BuiltStyledStreamWriter::pushValue(JSONCPP_STRING const& value) { + if (addChildValues_) + childValues_.push_back(value); + else + *sout_ << value; +} + +void BuiltStyledStreamWriter::writeIndent() { + // blep intended this to look at the so-far-written string + // to determine whether we are already indented, but + // with a stream we cannot do that. So we rely on some saved state. + // The caller checks indented_. + + if (!indentation_.empty()) { + // In this case, drop newlines too. + *sout_ << '\n' << indentString_; + } +} + +void BuiltStyledStreamWriter::writeWithIndent(JSONCPP_STRING const& value) { + if (!indented_) writeIndent(); + *sout_ << value; + indented_ = false; +} + +void BuiltStyledStreamWriter::indent() { indentString_ += indentation_; } + +void BuiltStyledStreamWriter::unindent() { + assert(indentString_.size() >= indentation_.size()); + indentString_.resize(indentString_.size() - indentation_.size()); +} + +void BuiltStyledStreamWriter::writeCommentBeforeValue(Value const& root) { + if (cs_ == CommentStyle::None) return; + if (!root.hasComment(commentBefore)) + return; + + if (!indented_) writeIndent(); + const JSONCPP_STRING& comment = root.getComment(commentBefore); + JSONCPP_STRING::const_iterator iter = comment.begin(); + while (iter != comment.end()) { + *sout_ << *iter; + if (*iter == '\n' && + ((iter+1) != comment.end() && *(iter + 1) == '/')) + // writeIndent(); // would write extra newline + *sout_ << indentString_; + ++iter; + } + indented_ = false; +} + +void BuiltStyledStreamWriter::writeCommentAfterValueOnSameLine(Value const& root) { + if (cs_ == CommentStyle::None) return; + if (root.hasComment(commentAfterOnSameLine)) + *sout_ << " " + root.getComment(commentAfterOnSameLine); + + if (root.hasComment(commentAfter)) { + writeIndent(); + *sout_ << root.getComment(commentAfter); + } +} + +// static +bool BuiltStyledStreamWriter::hasCommentForValue(const Value& value) { + return value.hasComment(commentBefore) || + value.hasComment(commentAfterOnSameLine) || + value.hasComment(commentAfter); +} + +/////////////// +// StreamWriter + +StreamWriter::StreamWriter() + : sout_(NULL) +{ +} +StreamWriter::~StreamWriter() +{ +} +StreamWriter::Factory::~Factory() +{} +StreamWriterBuilder::StreamWriterBuilder() +{ + setDefaults(&settings_); +} +StreamWriterBuilder::~StreamWriterBuilder() +{} +StreamWriter* StreamWriterBuilder::newStreamWriter() const +{ + JSONCPP_STRING indentation = settings_["indentation"].asString(); + JSONCPP_STRING cs_str = settings_["commentStyle"].asString(); + bool eyc = settings_["enableYAMLCompatibility"].asBool(); + bool dnp = settings_["dropNullPlaceholders"].asBool(); + bool usf = settings_["useSpecialFloats"].asBool(); + unsigned int pre = settings_["precision"].asUInt(); + CommentStyle::Enum cs = CommentStyle::All; + if (cs_str == "All") { + cs = CommentStyle::All; + } else if (cs_str == "None") { + cs = CommentStyle::None; + } else { + throwRuntimeError("commentStyle must be 'All' or 'None'"); + } + JSONCPP_STRING colonSymbol = " : "; + if (eyc) { + colonSymbol = ": "; + } else if (indentation.empty()) { + colonSymbol = ":"; + } + JSONCPP_STRING nullSymbol = "null"; + if (dnp) { + nullSymbol.clear(); + } + if (pre > 17) pre = 17; + JSONCPP_STRING endingLineFeedSymbol; + return new BuiltStyledStreamWriter( + indentation, cs, + colonSymbol, nullSymbol, endingLineFeedSymbol, usf, pre); +} +static void getValidWriterKeys(std::set<JSONCPP_STRING>* valid_keys) +{ + valid_keys->clear(); + valid_keys->insert("indentation"); + valid_keys->insert("commentStyle"); + valid_keys->insert("enableYAMLCompatibility"); + valid_keys->insert("dropNullPlaceholders"); + valid_keys->insert("useSpecialFloats"); + valid_keys->insert("precision"); +} +bool StreamWriterBuilder::validate(Json::Value* invalid) const +{ + Json::Value my_invalid; + if (!invalid) invalid = &my_invalid; // so we do not need to test for NULL + Json::Value& inv = *invalid; + std::set<JSONCPP_STRING> valid_keys; + getValidWriterKeys(&valid_keys); + Value::Members keys = settings_.getMemberNames(); + size_t n = keys.size(); + for (size_t i = 0; i < n; ++i) { + JSONCPP_STRING const& key = keys[i]; + if (valid_keys.find(key) == valid_keys.end()) { + inv[key] = settings_[key]; + } + } + return 0u == inv.size(); +} +Value& StreamWriterBuilder::operator[](JSONCPP_STRING key) +{ + return settings_[key]; +} +// static +void StreamWriterBuilder::setDefaults(Json::Value* settings) +{ + //! [StreamWriterBuilderDefaults] + (*settings)["commentStyle"] = "All"; + (*settings)["indentation"] = "\t"; + (*settings)["enableYAMLCompatibility"] = false; + (*settings)["dropNullPlaceholders"] = false; + (*settings)["useSpecialFloats"] = false; + (*settings)["precision"] = 17; + //! [StreamWriterBuilderDefaults] +} + +JSONCPP_STRING writeString(StreamWriter::Factory const& builder, Value const& root) { + JSONCPP_OSTRINGSTREAM sout; + StreamWriterPtr const writer(builder.newStreamWriter()); + writer->write(root, &sout); + return sout.str(); +} + +JSONCPP_OSTREAM& operator<<(JSONCPP_OSTREAM& sout, Value const& root) { + StreamWriterBuilder builder; + StreamWriterPtr const writer(builder.newStreamWriter()); + writer->write(root, &sout); + return sout; +} + +} // namespace Json