diff options
Diffstat (limited to 'src/lib_json/json_writer.cpp')
| -rw-r--r-- | src/lib_json/json_writer.cpp | 823 |
1 files changed, 678 insertions, 145 deletions
diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp index 89964ea..02f1cb1 100644 --- a/src/lib_json/json_writer.cpp +++ b/src/lib_json/json_writer.cpp @@ -1,4 +1,4 @@ -// Copyright 2011 Baptiste Lepilleur +// 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 @@ -7,15 +7,62 @@ #include <json/writer.h> #include "json_tool.h" #endif // if !defined(JSON_IS_AMALGAMATION) -#include <utility> -#include <assert.h> -#include <stdio.h> -#include <string.h> -#include <sstream> #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(_MSC_VER) && _MSC_VER < 1500 // VC++ 8.0 and below +#if defined(__BORLANDC__) #include <float.h> #define isfinite _finite #define snprintf _snprintf @@ -28,6 +75,12 @@ 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 + static bool containsControlCharacter(const char* str) { while (*str) { if (isControlCharacter(*(str++))) @@ -36,20 +89,33 @@ static bool containsControlCharacter(const char* str) { return false; } -std::string valueToString(LargestInt value) { +static bool containsControlCharacter0(const char* str, unsigned len) { + char const* end = str + len; + while (end != str) { + if (isControlCharacter(*str) || 0==*str) + return true; + ++str; + } + return false; +} + +JSONCPP_STRING valueToString(LargestInt value) { UIntToStringBuffer buffer; char* current = buffer + sizeof(buffer); - bool isNegative = value < 0; - if (isNegative) - value = -value; - uintToString(LargestUInt(value), current); - if (isNegative) + 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; } -std::string valueToString(LargestUInt value) { +JSONCPP_STRING valueToString(LargestUInt value) { UIntToStringBuffer buffer; char* current = buffer + sizeof(buffer); uintToString(value, current); @@ -59,68 +125,70 @@ std::string valueToString(LargestUInt value) { #if defined(JSON_HAS_INT64) -std::string valueToString(Int value) { +JSONCPP_STRING valueToString(Int value) { return valueToString(LargestInt(value)); } -std::string valueToString(UInt value) { +JSONCPP_STRING valueToString(UInt value) { return valueToString(LargestUInt(value)); } #endif // # if defined(JSON_HAS_INT64) -std::string valueToString(double value) { +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[32]; + char buffer[36]; int len = -1; -// Print into the buffer. We need not request the alternative representation -// that always has a decimal point because JSON doesn't distingish the -// concepts of reals and integers. -#if defined(_MSC_VER) && defined(__STDC_SECURE_LIB__) // Use secure version with - // visual studio 2005 to - // avoid warning. -#if defined(WINCE) - len = _snprintf(buffer, sizeof(buffer), "%.16g", value); -#else - len = sprintf_s(buffer, sizeof(buffer), "%.16g", value); -#endif -#else + char formatString[15]; + snprintf(formatString, sizeof(formatString), "%%.%dg", precision); + + // Print into the buffer. We need not request the alternative representation + // that always has a decimal point because JSON doesn't distingish the + // concepts of reals and integers. if (isfinite(value)) { - len = snprintf(buffer, sizeof(buffer), "%.16g", 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), "null"); + len = snprintf(buffer, sizeof(buffer), useSpecialFloats ? "NaN" : "null"); } else if (value < 0) { - len = snprintf(buffer, sizeof(buffer), "-1e+9999"); + len = snprintf(buffer, sizeof(buffer), useSpecialFloats ? "-Infinity" : "-1e+9999"); } else { - len = snprintf(buffer, sizeof(buffer), "1e+9999"); + len = snprintf(buffer, sizeof(buffer), useSpecialFloats ? "Infinity" : "1e+9999"); } - // For those, we do not need to call fixNumLoc, but it is fast. } -#endif assert(len >= 0); - fixNumericLocale(buffer, buffer + len); return buffer; } +} + +JSONCPP_STRING valueToString(double value) { return valueToString(value, false, 17); } -std::string valueToString(bool value) { return value ? "true" : "false"; } +JSONCPP_STRING valueToString(bool value) { return value ? "true" : "false"; } -std::string valueToQuotedString(const char* value) { +JSONCPP_STRING valueToQuotedString(const char* value) { if (value == NULL) return ""; // Not sure how to handle unicode... if (strpbrk(value, "\"\\\b\f\n\r\t") == NULL && !containsControlCharacter(value)) - return std::string("\"") + value + "\""; + return JSONCPP_STRING("\"") + value + "\""; // We have to walk value and escape any special characters. - // Appending to std::string is not efficient, but this should be rare. + // Appending to JSONCPP_STRING is not efficient, but this should be rare. // (Note: forward slashes are *not* rare, but I am not escaping them.) - std::string::size_type maxsize = + JSONCPP_STRING::size_type maxsize = strlen(value) * 2 + 3; // allescaped+quotes+NULL - std::string result; + JSONCPP_STRING result; result.reserve(maxsize); // to avoid lots of mallocs result += "\""; for (const char* c = value; *c != 0; ++c) { @@ -156,7 +224,85 @@ std::string valueToQuotedString(const char* value) { // sequence from occurring. default: if (isControlCharacter(*c)) { - std::ostringstream oss; + JSONCPP_OSTRINGSTREAM oss; + oss << "\\u" << std::hex << std::uppercase << std::setfill('0') + << std::setw(4) << static_cast<int>(*c); + result += oss.str(); + } else { + result += *c; + } + break; + } + } + result += "\""; + return result; +} + +// https://github.com/upcaste/upcaste/blob/master/src/upcore/src/cstring/strnpbrk.cpp +static char const* strnpbrk(char const* s, char const* accept, size_t n) { + assert((s || !n) && accept); + + char const* const end = s + n; + for (char const* cur = s; cur < end; ++cur) { + int const c = *cur; + for (char const* a = accept; *a; ++a) { + if (*a == c) { + return cur; + } + } + } + return NULL; +} +static JSONCPP_STRING valueToQuotedStringN(const char* value, unsigned length) { + if (value == NULL) + return ""; + // Not sure how to handle unicode... + if (strnpbrk(value, "\"\\\b\f\n\r\t", length) == NULL && + !containsControlCharacter0(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: + if ((isControlCharacter(*c)) || (*c == 0)) { + JSONCPP_OSTRINGSTREAM oss; oss << "\\u" << std::hex << std::uppercase << std::setfill('0') << std::setw(4) << static_cast<int>(*c); result += oss.str(); @@ -187,8 +333,8 @@ void FastWriter::dropNullPlaceholders() { dropNullPlaceholders_ = true; } void FastWriter::omitEndingLineFeed() { omitEndingLineFeed_ = true; } -std::string FastWriter::write(const Value& root) { - document_ = ""; +JSONCPP_STRING FastWriter::write(const Value& root) { + document_.clear(); writeValue(root); if (!omitEndingLineFeed_) document_ += "\n"; @@ -211,15 +357,21 @@ void FastWriter::writeValue(const Value& value) { document_ += valueToString(value.asDouble()); break; case stringValue: - document_ += valueToQuotedString(value.asCString()); + { + // 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_ += '['; - int size = value.size(); - for (int index = 0; index < size; ++index) { + ArrayIndex size = value.size(); + for (ArrayIndex index = 0; index < size; ++index) { if (index > 0) document_ += ','; writeValue(value[index]); @@ -231,10 +383,10 @@ void FastWriter::writeValue(const Value& value) { document_ += '{'; for (Value::Members::iterator it = members.begin(); it != members.end(); ++it) { - const std::string& name = *it; + const JSONCPP_STRING& name = *it; if (it != members.begin()) document_ += ','; - document_ += valueToQuotedString(name.c_str()); + document_ += valueToQuotedStringN(name.data(), static_cast<unsigned>(name.length())); document_ += yamlCompatiblityEnabled_ ? ": " : ":"; writeValue(value[name]); } @@ -249,10 +401,10 @@ void FastWriter::writeValue(const Value& value) { StyledWriter::StyledWriter() : rightMargin_(74), indentSize_(3), addChildValues_() {} -std::string StyledWriter::write(const Value& root) { - document_ = ""; +JSONCPP_STRING StyledWriter::write(const Value& root) { + document_.clear(); addChildValues_ = false; - indentString_ = ""; + indentString_.clear(); writeCommentBeforeValue(root); writeValue(root); writeCommentAfterValueOnSameLine(root); @@ -275,8 +427,15 @@ void StyledWriter::writeValue(const Value& value) { pushValue(valueToString(value.asDouble())); break; case stringValue: - pushValue(valueToQuotedString(value.asCString())); + { + // 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; @@ -292,7 +451,7 @@ void StyledWriter::writeValue(const Value& value) { indent(); Value::Members::iterator it = members.begin(); for (;;) { - const std::string& name = *it; + const JSONCPP_STRING& name = *it; const Value& childValue = value[name]; writeCommentBeforeValue(childValue); writeWithIndent(valueToQuotedString(name.c_str())); @@ -356,23 +515,25 @@ void StyledWriter::writeArrayValue(const Value& value) { } bool StyledWriter::isMultineArray(const Value& value) { - int size = value.size(); + ArrayIndex const size = value.size(); bool isMultiLine = size * 3 >= rightMargin_; childValues_.clear(); - for (int index = 0; index < size && !isMultiLine; ++index) { + for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) { const Value& childValue = value[index]; - isMultiLine = - isMultiLine || ((childValue.isArray() || childValue.isObject()) && + isMultiLine = ((childValue.isArray() || childValue.isObject()) && childValue.size() > 0); } if (!isMultiLine) // check if line length > max line length { childValues_.reserve(size); addChildValues_ = true; - int lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]' - for (int index = 0; index < size; ++index) { + ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]' + for (ArrayIndex index = 0; index < size; ++index) { + if (hasCommentForValue(value[index])) { + isMultiLine = true; + } writeValue(value[index]); - lineLength += int(childValues_[index].length()); + lineLength += static_cast<ArrayIndex>(childValues_[index].length()); } addChildValues_ = false; isMultiLine = isMultiLine || lineLength >= rightMargin_; @@ -380,7 +541,7 @@ bool StyledWriter::isMultineArray(const Value& value) { return isMultiLine; } -void StyledWriter::pushValue(const std::string& value) { +void StyledWriter::pushValue(const JSONCPP_STRING& value) { if (addChildValues_) childValues_.push_back(value); else @@ -398,15 +559,15 @@ void StyledWriter::writeIndent() { document_ += indentString_; } -void StyledWriter::writeWithIndent(const std::string& value) { +void StyledWriter::writeWithIndent(const JSONCPP_STRING& value) { writeIndent(); document_ += value; } -void StyledWriter::indent() { indentString_ += std::string(indentSize_, ' '); } +void StyledWriter::indent() { indentString_ += JSONCPP_STRING(indentSize_, ' '); } void StyledWriter::unindent() { - assert(int(indentString_.size()) >= indentSize_); + assert(indentString_.size() >= indentSize_); indentString_.resize(indentString_.size() - indentSize_); } @@ -416,26 +577,27 @@ void StyledWriter::writeCommentBeforeValue(const Value& root) { document_ += "\n"; writeIndent(); - std::string normalizedComment = normalizeEOL(root.getComment(commentBefore)); - std::string::const_iterator iter = normalizedComment.begin(); - while (iter != normalizedComment.end()) { + 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) == '/') + if (*iter == '\n' && + (iter != comment.end() && *(iter + 1) == '/')) writeIndent(); ++iter; } - // Comments are stripped of newlines, so add one here + // Comments are stripped of trailing newlines, so add one here document_ += "\n"; } void StyledWriter::writeCommentAfterValueOnSameLine(const Value& root) { if (root.hasComment(commentAfterOnSameLine)) - document_ += " " + normalizeEOL(root.getComment(commentAfterOnSameLine)); + document_ += " " + root.getComment(commentAfterOnSameLine); if (root.hasComment(commentAfter)) { document_ += "\n"; - document_ += normalizeEOL(root.getComment(commentAfter)); + document_ += root.getComment(commentAfter); document_ += "\n"; } } @@ -446,37 +608,21 @@ bool StyledWriter::hasCommentForValue(const Value& value) { value.hasComment(commentAfter); } -std::string StyledWriter::normalizeEOL(const std::string& text) { - std::string normalized; - normalized.reserve(text.length()); - const char* begin = text.c_str(); - const char* end = begin + text.length(); - const char* current = begin; - while (current != end) { - char c = *current++; - if (c == '\r') // mac or dos EOL - { - if (*current == '\n') // convert dos EOL - ++current; - normalized += '\n'; - } else // handle unix EOL & other char - normalized += c; - } - return normalized; -} - // Class StyledStreamWriter // ////////////////////////////////////////////////////////////////// -StyledStreamWriter::StyledStreamWriter(std::string indentation) +StyledStreamWriter::StyledStreamWriter(JSONCPP_STRING indentation) : document_(NULL), rightMargin_(74), indentation_(indentation), addChildValues_() {} -void StyledStreamWriter::write(std::ostream& out, const Value& root) { +void StyledStreamWriter::write(JSONCPP_OSTREAM& out, const Value& root) { document_ = &out; addChildValues_ = false; - indentString_ = ""; + indentString_.clear(); + indented_ = true; writeCommentBeforeValue(root); + if (!indented_) writeIndent(); + indented_ = true; writeValue(root); writeCommentAfterValueOnSameLine(root); *document_ << "\n"; @@ -498,8 +644,15 @@ void StyledStreamWriter::writeValue(const Value& value) { pushValue(valueToString(value.asDouble())); break; case stringValue: - pushValue(valueToQuotedString(value.asCString())); + { + // 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; @@ -515,7 +668,7 @@ void StyledStreamWriter::writeValue(const Value& value) { indent(); Value::Members::iterator it = members.begin(); for (;;) { - const std::string& name = *it; + const JSONCPP_STRING& name = *it; const Value& childValue = value[name]; writeCommentBeforeValue(childValue); writeWithIndent(valueToQuotedString(name.c_str())); @@ -552,8 +705,10 @@ void StyledStreamWriter::writeArrayValue(const Value& value) { if (hasChildValue) writeWithIndent(childValues_[index]); else { - writeIndent(); + if (!indented_) writeIndent(); + indented_ = true; writeValue(childValue); + indented_ = false; } if (++index == size) { writeCommentAfterValueOnSameLine(childValue); @@ -579,23 +734,25 @@ void StyledStreamWriter::writeArrayValue(const Value& value) { } bool StyledStreamWriter::isMultineArray(const Value& value) { - int size = value.size(); + ArrayIndex const size = value.size(); bool isMultiLine = size * 3 >= rightMargin_; childValues_.clear(); - for (int index = 0; index < size && !isMultiLine; ++index) { + for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) { const Value& childValue = value[index]; - isMultiLine = - isMultiLine || ((childValue.isArray() || childValue.isObject()) && + isMultiLine = ((childValue.isArray() || childValue.isObject()) && childValue.size() > 0); } if (!isMultiLine) // check if line length > max line length { childValues_.reserve(size); addChildValues_ = true; - int lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]' - for (int index = 0; index < size; ++index) { + ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]' + for (ArrayIndex index = 0; index < size; ++index) { + if (hasCommentForValue(value[index])) { + isMultiLine = true; + } writeValue(value[index]); - lineLength += int(childValues_[index].length()); + lineLength += static_cast<ArrayIndex>(childValues_[index].length()); } addChildValues_ = false; isMultiLine = isMultiLine || lineLength >= rightMargin_; @@ -603,7 +760,7 @@ bool StyledStreamWriter::isMultineArray(const Value& value) { return isMultiLine; } -void StyledStreamWriter::pushValue(const std::string& value) { +void StyledStreamWriter::pushValue(const JSONCPP_STRING& value) { if (addChildValues_) childValues_.push_back(value); else @@ -611,24 +768,17 @@ void StyledStreamWriter::pushValue(const std::string& value) { } void StyledStreamWriter::writeIndent() { - /* - Some comments in this method would have been nice. ;-) - - if ( !document_.empty() ) - { - char last = document_[document_.length()-1]; - if ( last == ' ' ) // already indented - return; - if ( last != '\n' ) // Comments may add new-line - *document_ << '\n'; - } - */ + // 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 std::string& value) { - writeIndent(); +void StyledStreamWriter::writeWithIndent(const JSONCPP_STRING& value) { + if (!indented_) writeIndent(); *document_ << value; + indented_ = false; } void StyledStreamWriter::indent() { indentString_ += indentation_; } @@ -641,19 +791,30 @@ void StyledStreamWriter::unindent() { void StyledStreamWriter::writeCommentBeforeValue(const Value& root) { if (!root.hasComment(commentBefore)) return; - *document_ << normalizeEOL(root.getComment(commentBefore)); - *document_ << "\n"; + + 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 != comment.end() && *(iter + 1) == '/')) + // writeIndent(); // would include newline + *document_ << indentString_; + ++iter; + } + indented_ = false; } void StyledStreamWriter::writeCommentAfterValueOnSameLine(const Value& root) { if (root.hasComment(commentAfterOnSameLine)) - *document_ << " " + normalizeEOL(root.getComment(commentAfterOnSameLine)); + *document_ << ' ' << root.getComment(commentAfterOnSameLine); if (root.hasComment(commentAfter)) { - *document_ << "\n"; - *document_ << normalizeEOL(root.getComment(commentAfter)); - *document_ << "\n"; + writeIndent(); + *document_ << root.getComment(commentAfter); } + indented_ = false; } bool StyledStreamWriter::hasCommentForValue(const Value& value) { @@ -662,28 +823,400 @@ bool StyledStreamWriter::hasCommentForValue(const Value& value) { value.hasComment(commentAfter); } -std::string StyledStreamWriter::normalizeEOL(const std::string& text) { - std::string normalized; - normalized.reserve(text.length()); - const char* begin = text.c_str(); - const char* end = begin + text.length(); - const char* current = begin; - while (current != end) { - char c = *current++; - if (c == '\r') // mac or dos EOL +////////////////////////// +// 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 isMultineArray(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) || isMultineArray(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 { - if (*current == '\n') // convert dos EOL - ++current; - normalized += '\n'; - } else // handle unix EOL & other char - normalized += c; + 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::isMultineArray(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_; } - return normalized; } -std::ostream& operator<<(std::ostream& sout, const Value& root) { - Json::StyledStreamWriter writer; - writer.write(sout, root); +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 != 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; } |