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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/rapidjson/example | |
parent | Initial commit. (diff) | |
download | ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rapidjson/example')
-rw-r--r-- | src/rapidjson/example/CMakeLists.txt | 42 | ||||
-rw-r--r-- | src/rapidjson/example/capitalize/capitalize.cpp | 67 | ||||
-rw-r--r-- | src/rapidjson/example/condense/condense.cpp | 32 | ||||
-rw-r--r-- | src/rapidjson/example/filterkey/filterkey.cpp | 135 | ||||
-rw-r--r-- | src/rapidjson/example/filterkeydom/filterkeydom.cpp | 170 | ||||
-rw-r--r-- | src/rapidjson/example/jsonx/jsonx.cpp | 207 | ||||
-rw-r--r-- | src/rapidjson/example/messagereader/messagereader.cpp | 105 | ||||
-rw-r--r-- | src/rapidjson/example/parsebyparts/parsebyparts.cpp | 173 | ||||
-rw-r--r-- | src/rapidjson/example/pretty/pretty.cpp | 30 | ||||
-rw-r--r-- | src/rapidjson/example/prettyauto/prettyauto.cpp | 56 | ||||
-rw-r--r-- | src/rapidjson/example/schemavalidator/schemavalidator.cpp | 72 | ||||
-rw-r--r-- | src/rapidjson/example/serialize/serialize.cpp | 173 | ||||
-rw-r--r-- | src/rapidjson/example/simpledom/simpledom.cpp | 29 | ||||
-rw-r--r-- | src/rapidjson/example/simplereader/simplereader.cpp | 42 | ||||
-rw-r--r-- | src/rapidjson/example/simplewriter/simplewriter.cpp | 36 | ||||
-rw-r--r-- | src/rapidjson/example/tutorial/tutorial.cpp | 151 |
16 files changed, 1520 insertions, 0 deletions
diff --git a/src/rapidjson/example/CMakeLists.txt b/src/rapidjson/example/CMakeLists.txt new file mode 100644 index 000000000..4d448ccc0 --- /dev/null +++ b/src/rapidjson/example/CMakeLists.txt @@ -0,0 +1,42 @@ +cmake_minimum_required(VERSION 2.8) + +if(POLICY CMP0054) + cmake_policy(SET CMP0054 NEW) +endif() + +set(EXAMPLES + capitalize + condense + filterkey + filterkeydom + jsonx + messagereader + parsebyparts + pretty + prettyauto + schemavalidator + serialize + simpledom + simplereader + simplewriter + tutorial) + +include_directories("../include/") + +add_definitions(-D__STDC_FORMAT_MACROS) + +if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU") + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread -Werror -Wall -Wextra -Weffc++ -Wswitch-default") +elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang") + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wall -Wextra -Weffc++ -Wswitch-default -Wfloat-equal -Wimplicit-fallthrough -Weverything") +endif() + +foreach (example ${EXAMPLES}) + add_executable(${example} ${example}/${example}.cpp) +endforeach() + +if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") + target_link_libraries(parsebyparts pthread) +endif() + +add_custom_target(examples ALL DEPENDS ${EXAMPLES}) diff --git a/src/rapidjson/example/capitalize/capitalize.cpp b/src/rapidjson/example/capitalize/capitalize.cpp new file mode 100644 index 000000000..7da37e9c5 --- /dev/null +++ b/src/rapidjson/example/capitalize/capitalize.cpp @@ -0,0 +1,67 @@ +// JSON condenser example + +// 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 RawNumber(const char* str, SizeType length, bool copy) { return out_.RawNumber(str, length, copy); } + bool String(const char* str, SizeType length, bool) { + buffer_.clear(); + for (SizeType i = 0; i < length; i++) + buffer_.push_back(static_cast<char>(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 Key(const char* str, SizeType length, bool copy) { return String(str, length, copy); } + 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_; + +private: + CapitalizeFilter(const CapitalizeFilter&); + CapitalizeFilter& operator=(const CapitalizeFilter&); +}; + +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", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode())); + return 1; + } + + return 0; +} diff --git a/src/rapidjson/example/condense/condense.cpp b/src/rapidjson/example/condense/condense.cpp new file mode 100644 index 000000000..46dc35043 --- /dev/null +++ b/src/rapidjson/example/condense/condense.cpp @@ -0,0 +1,32 @@ +// JSON condenser example + +// This example parses JSON text from stdin with validation, +// and re-output the JSON content to stdout without whitespace. + +#include "rapidjson/reader.h" +#include "rapidjson/writer.h" +#include "rapidjson/filereadstream.h" +#include "rapidjson/filewritestream.h" +#include "rapidjson/error/en.h" + +using namespace rapidjson; + +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. + if (!reader.Parse(is, writer)) { + fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode())); + return 1; + } + + return 0; +} diff --git a/src/rapidjson/example/filterkey/filterkey.cpp b/src/rapidjson/example/filterkey/filterkey.cpp new file mode 100644 index 000000000..c34a050dc --- /dev/null +++ b/src/rapidjson/example/filterkey/filterkey.cpp @@ -0,0 +1,135 @@ +// JSON filterkey example with SAX-style API. + +// This example parses JSON text from stdin with validation. +// During parsing, specified key will be filtered using a SAX handler. +// It re-output the JSON content to stdout without whitespace. + +#include "rapidjson/reader.h" +#include "rapidjson/writer.h" +#include "rapidjson/filereadstream.h" +#include "rapidjson/filewritestream.h" +#include "rapidjson/error/en.h" +#include <stack> + +using namespace rapidjson; + +// This handler forwards event into an output handler, with filtering the descendent events of specified key. +template <typename OutputHandler> +class FilterKeyHandler { +public: + typedef char Ch; + + FilterKeyHandler(OutputHandler& outputHandler, const Ch* keyString, SizeType keyLength) : + outputHandler_(outputHandler), keyString_(keyString), keyLength_(keyLength), filterValueDepth_(), filteredKeyCount_() + {} + + bool Null() { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Null() && EndValue(); } + bool Bool(bool b) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Bool(b) && EndValue(); } + bool Int(int i) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Int(i) && EndValue(); } + bool Uint(unsigned u) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Uint(u) && EndValue(); } + bool Int64(int64_t i) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Int64(i) && EndValue(); } + bool Uint64(uint64_t u) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Uint64(u) && EndValue(); } + bool Double(double d) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Double(d) && EndValue(); } + bool RawNumber(const Ch* str, SizeType len, bool copy) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.RawNumber(str, len, copy) && EndValue(); } + bool String (const Ch* str, SizeType len, bool copy) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.String (str, len, copy) && EndValue(); } + + bool StartObject() { + if (filterValueDepth_ > 0) { + filterValueDepth_++; + return true; + } + else { + filteredKeyCount_.push(0); + return outputHandler_.StartObject(); + } + } + + bool Key(const Ch* str, SizeType len, bool copy) { + if (filterValueDepth_ > 0) + return true; + else if (len == keyLength_ && std::memcmp(str, keyString_, len) == 0) { + filterValueDepth_ = 1; + return true; + } + else { + ++filteredKeyCount_.top(); + return outputHandler_.Key(str, len, copy); + } + } + + bool EndObject(SizeType) { + if (filterValueDepth_ > 0) { + filterValueDepth_--; + return EndValue(); + } + else { + // Use our own filtered memberCount + SizeType memberCount = filteredKeyCount_.top(); + filteredKeyCount_.pop(); + return outputHandler_.EndObject(memberCount) && EndValue(); + } + } + + bool StartArray() { + if (filterValueDepth_ > 0) { + filterValueDepth_++; + return true; + } + else + return outputHandler_.StartArray(); + } + + bool EndArray(SizeType elementCount) { + if (filterValueDepth_ > 0) { + filterValueDepth_--; + return EndValue(); + } + else + return outputHandler_.EndArray(elementCount) && EndValue(); + } + +private: + FilterKeyHandler(const FilterKeyHandler&); + FilterKeyHandler& operator=(const FilterKeyHandler&); + + bool EndValue() { + if (filterValueDepth_ == 1) // Just at the end of value after filtered key + filterValueDepth_ = 0; + return true; + } + + OutputHandler& outputHandler_; + const char* keyString_; + const SizeType keyLength_; + unsigned filterValueDepth_; + std::stack<SizeType> filteredKeyCount_; +}; + +int main(int argc, char* argv[]) { + if (argc != 2) { + fprintf(stderr, "filterkey key < input.json > output.json\n"); + return 1; + } + + // 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); + + // Prepare Filter + FilterKeyHandler<Writer<FileWriteStream> > filter(writer, argv[1], static_cast<SizeType>(strlen(argv[1]))); + + // JSON reader parse from the input stream, filter handler filters the events, and forward to writer. + // i.e. the events flow is: reader -> filter -> writer + if (!reader.Parse(is, filter)) { + fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode())); + return 1; + } + + return 0; +} diff --git a/src/rapidjson/example/filterkeydom/filterkeydom.cpp b/src/rapidjson/example/filterkeydom/filterkeydom.cpp new file mode 100644 index 000000000..732cc81f1 --- /dev/null +++ b/src/rapidjson/example/filterkeydom/filterkeydom.cpp @@ -0,0 +1,170 @@ +// JSON filterkey example which populates filtered SAX events into a Document. + +// This example parses JSON text from stdin with validation. +// During parsing, specified key will be filtered using a SAX handler. +// And finally the filtered events are used to populate a Document. +// As an example, the document is written to standard output. + +#include "rapidjson/document.h" +#include "rapidjson/writer.h" +#include "rapidjson/filereadstream.h" +#include "rapidjson/filewritestream.h" +#include "rapidjson/error/en.h" +#include <stack> + +using namespace rapidjson; + +// This handler forwards event into an output handler, with filtering the descendent events of specified key. +template <typename OutputHandler> +class FilterKeyHandler { +public: + typedef char Ch; + + FilterKeyHandler(OutputHandler& outputHandler, const Ch* keyString, SizeType keyLength) : + outputHandler_(outputHandler), keyString_(keyString), keyLength_(keyLength), filterValueDepth_(), filteredKeyCount_() + {} + + bool Null() { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Null() && EndValue(); } + bool Bool(bool b) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Bool(b) && EndValue(); } + bool Int(int i) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Int(i) && EndValue(); } + bool Uint(unsigned u) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Uint(u) && EndValue(); } + bool Int64(int64_t i) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Int64(i) && EndValue(); } + bool Uint64(uint64_t u) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Uint64(u) && EndValue(); } + bool Double(double d) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.Double(d) && EndValue(); } + bool RawNumber(const Ch* str, SizeType len, bool copy) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.RawNumber(str, len, copy) && EndValue(); } + bool String (const Ch* str, SizeType len, bool copy) { return filterValueDepth_ > 0 ? EndValue() : outputHandler_.String (str, len, copy) && EndValue(); } + + bool StartObject() { + if (filterValueDepth_ > 0) { + filterValueDepth_++; + return true; + } + else { + filteredKeyCount_.push(0); + return outputHandler_.StartObject(); + } + } + + bool Key(const Ch* str, SizeType len, bool copy) { + if (filterValueDepth_ > 0) + return true; + else if (len == keyLength_ && std::memcmp(str, keyString_, len) == 0) { + filterValueDepth_ = 1; + return true; + } + else { + ++filteredKeyCount_.top(); + return outputHandler_.Key(str, len, copy); + } + } + + bool EndObject(SizeType) { + if (filterValueDepth_ > 0) { + filterValueDepth_--; + return EndValue(); + } + else { + // Use our own filtered memberCount + SizeType memberCount = filteredKeyCount_.top(); + filteredKeyCount_.pop(); + return outputHandler_.EndObject(memberCount) && EndValue(); + } + } + + bool StartArray() { + if (filterValueDepth_ > 0) { + filterValueDepth_++; + return true; + } + else + return outputHandler_.StartArray(); + } + + bool EndArray(SizeType elementCount) { + if (filterValueDepth_ > 0) { + filterValueDepth_--; + return EndValue(); + } + else + return outputHandler_.EndArray(elementCount) && EndValue(); + } + +private: + FilterKeyHandler(const FilterKeyHandler&); + FilterKeyHandler& operator=(const FilterKeyHandler&); + + bool EndValue() { + if (filterValueDepth_ == 1) // Just at the end of value after filtered key + filterValueDepth_ = 0; + return true; + } + + OutputHandler& outputHandler_; + const char* keyString_; + const SizeType keyLength_; + unsigned filterValueDepth_; + std::stack<SizeType> filteredKeyCount_; +}; + +// Implements a generator for Document::Populate() +template <typename InputStream> +class FilterKeyReader { +public: + typedef char Ch; + + FilterKeyReader(InputStream& is, const Ch* keyString, SizeType keyLength) : + is_(is), keyString_(keyString), keyLength_(keyLength), parseResult_() + {} + + // SAX event flow: reader -> filter -> handler + template <typename Handler> + bool operator()(Handler& handler) { + FilterKeyHandler<Handler> filter(handler, keyString_, keyLength_); + Reader reader; + parseResult_ = reader.Parse(is_, filter); + return parseResult_; + } + + const ParseResult& GetParseResult() const { return parseResult_; } + +private: + FilterKeyReader(const FilterKeyReader&); + FilterKeyReader& operator=(const FilterKeyReader&); + + InputStream& is_; + const char* keyString_; + const SizeType keyLength_; + ParseResult parseResult_; +}; + +int main(int argc, char* argv[]) { + if (argc != 2) { + fprintf(stderr, "filterkeydom key < input.json > output.json\n"); + return 1; + } + + // Prepare input stream. + char readBuffer[65536]; + FileReadStream is(stdin, readBuffer, sizeof(readBuffer)); + + // Prepare Filter + FilterKeyReader<FileReadStream> reader(is, argv[1], static_cast<SizeType>(strlen(argv[1]))); + + // Populates the filtered events from reader + Document document; + document.Populate(reader); + ParseResult pr = reader.GetParseResult(); + if (!pr) { + fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(pr.Offset()), GetParseError_En(pr.Code())); + return 1; + } + + // Prepare JSON writer and output stream. + char writeBuffer[65536]; + FileWriteStream os(stdout, writeBuffer, sizeof(writeBuffer)); + Writer<FileWriteStream> writer(os); + + // Write the document to standard output + document.Accept(writer); + return 0; +} diff --git a/src/rapidjson/example/jsonx/jsonx.cpp b/src/rapidjson/example/jsonx/jsonx.cpp new file mode 100644 index 000000000..1346b578c --- /dev/null +++ b/src/rapidjson/example/jsonx/jsonx.cpp @@ -0,0 +1,207 @@ +// JSON to JSONx conversion exmaple, using SAX API. +// JSONx is an IBM standard format to represent JSON as XML. +// https://www-01.ibm.com/support/knowledgecenter/SS9H2Y_7.1.0/com.ibm.dp.doc/json_jsonx.html +// This example parses JSON text from stdin with validation, +// and convert to JSONx format to stdout. +// Need compile with -D__STDC_FORMAT_MACROS for defining PRId64 and PRIu64 macros. + +#include "rapidjson/reader.h" +#include "rapidjson/stringbuffer.h" +#include "rapidjson/filereadstream.h" +#include "rapidjson/filewritestream.h" +#include "rapidjson/error/en.h" +#include <cstdio> + +using namespace rapidjson; + +// For simplicity, this example only read/write in UTF-8 encoding +template <typename OutputStream> +class JsonxWriter { +public: + JsonxWriter(OutputStream& os) : os_(os), name_(), level_(0), hasName_(false) { + } + + bool Null() { + return WriteStartElement("null", true); + } + + bool Bool(bool b) { + return + WriteStartElement("boolean") && + WriteString(b ? "true" : "false") && + WriteEndElement("boolean"); + } + + bool Int(int i) { + char buffer[12]; + return WriteNumberElement(buffer, sprintf(buffer, "%d", i)); + } + + bool Uint(unsigned i) { + char buffer[11]; + return WriteNumberElement(buffer, sprintf(buffer, "%u", i)); + } + + bool Int64(int64_t i) { + char buffer[21]; + return WriteNumberElement(buffer, sprintf(buffer, "%" PRId64, i)); + } + + bool Uint64(uint64_t i) { + char buffer[21]; + return WriteNumberElement(buffer, sprintf(buffer, "%" PRIu64, i)); + } + + bool Double(double d) { + char buffer[30]; + return WriteNumberElement(buffer, sprintf(buffer, "%.17g", d)); + } + + bool RawNumber(const char* str, SizeType length, bool) { + return + WriteStartElement("number") && + WriteEscapedText(str, length) && + WriteEndElement("number"); + } + + bool String(const char* str, SizeType length, bool) { + return + WriteStartElement("string") && + WriteEscapedText(str, length) && + WriteEndElement("string"); + } + + bool StartObject() { + return WriteStartElement("object"); + } + + bool Key(const char* str, SizeType length, bool) { + // backup key to name_ + name_.Clear(); + for (SizeType i = 0; i < length; i++) + name_.Put(str[i]); + hasName_ = true; + return true; + } + + bool EndObject(SizeType) { + return WriteEndElement("object"); + } + + bool StartArray() { + return WriteStartElement("array"); + } + + bool EndArray(SizeType) { + return WriteEndElement("array"); + } + +private: + bool WriteString(const char* s) { + while (*s) + os_.Put(*s++); + return true; + } + + bool WriteEscapedAttributeValue(const char* s, size_t length) { + for (size_t i = 0; i < length; i++) { + switch (s[i]) { + case '&': WriteString("&"); break; + case '<': WriteString("<"); break; + case '"': WriteString("""); break; + default: os_.Put(s[i]); break; + } + } + return true; + } + + bool WriteEscapedText(const char* s, size_t length) { + for (size_t i = 0; i < length; i++) { + switch (s[i]) { + case '&': WriteString("&"); break; + case '<': WriteString("<"); break; + default: os_.Put(s[i]); break; + } + } + return true; + } + + bool WriteStartElement(const char* type, bool emptyElement = false) { + if (level_ == 0) + if (!WriteString("<?xml version=\"1.0\" encoding=\"UTF-8\"?>")) + return false; + + if (!WriteString("<json:") || !WriteString(type)) + return false; + + // For root element, need to add declarations + if (level_ == 0) { + if (!WriteString( + " xsi:schemaLocation=\"http://www.datapower.com/schemas/json jsonx.xsd\"" + " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"" + " xmlns:json=\"http://www.ibm.com/xmlns/prod/2009/jsonx\"")) + return false; + } + + if (hasName_) { + hasName_ = false; + if (!WriteString(" name=\"") || + !WriteEscapedAttributeValue(name_.GetString(), name_.GetSize()) || + !WriteString("\"")) + return false; + } + + if (emptyElement) + return WriteString("/>"); + else { + level_++; + return WriteString(">"); + } + } + + bool WriteEndElement(const char* type) { + if (!WriteString("</json:") || + !WriteString(type) || + !WriteString(">")) + return false; + + // For the last end tag, flush the output stream. + if (--level_ == 0) + os_.Flush(); + + return true; + } + + bool WriteNumberElement(const char* buffer, int length) { + if (!WriteStartElement("number")) + return false; + for (int j = 0; j < length; j++) + os_.Put(buffer[j]); + return WriteEndElement("number"); + } + + OutputStream& os_; + StringBuffer name_; + unsigned level_; + bool hasName_; +}; + +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)); + JsonxWriter<FileWriteStream> writer(os); + + // JSON reader parse from the input stream and let writer generate the output. + if (!reader.Parse(is, writer)) { + fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode())); + return 1; + } + + return 0; +} diff --git a/src/rapidjson/example/messagereader/messagereader.cpp b/src/rapidjson/example/messagereader/messagereader.cpp new file mode 100644 index 000000000..3399bc940 --- /dev/null +++ b/src/rapidjson/example/messagereader/messagereader.cpp @@ -0,0 +1,105 @@ +// Reading a message JSON with Reader (SAX-style API). +// The JSON should be an object with key-string pairs. + +#include "rapidjson/reader.h" +#include "rapidjson/error/en.h" +#include <iostream> +#include <string> +#include <map> + +using namespace std; +using namespace rapidjson; + +typedef map<string, string> MessageMap; + +#if defined(__GNUC__) +RAPIDJSON_DIAG_PUSH +RAPIDJSON_DIAG_OFF(effc++) +#endif + +#ifdef __clang__ +RAPIDJSON_DIAG_PUSH +RAPIDJSON_DIAG_OFF(switch-enum) +#endif + +struct MessageHandler + : public BaseReaderHandler<UTF8<>, MessageHandler> { + MessageHandler() : messages_(), state_(kExpectObjectStart), name_() {} + + bool StartObject() { + switch (state_) { + case kExpectObjectStart: + state_ = kExpectNameOrObjectEnd; + return true; + default: + return false; + } + } + + bool String(const char* str, SizeType length, bool) { + switch (state_) { + case kExpectNameOrObjectEnd: + name_ = string(str, length); + state_ = kExpectValue; + return true; + case kExpectValue: + messages_.insert(MessageMap::value_type(name_, string(str, length))); + state_ = kExpectNameOrObjectEnd; + return true; + default: + return false; + } + } + + bool EndObject(SizeType) { return state_ == kExpectNameOrObjectEnd; } + + bool Default() { return false; } // All other events are invalid. + + MessageMap messages_; + enum State { + kExpectObjectStart, + kExpectNameOrObjectEnd, + kExpectValue + }state_; + std::string name_; +}; + +#if defined(__GNUC__) +RAPIDJSON_DIAG_POP +#endif + +#ifdef __clang__ +RAPIDJSON_DIAG_POP +#endif + +static void ParseMessages(const char* json, MessageMap& messages) { + Reader reader; + MessageHandler handler; + StringStream ss(json); + if (reader.Parse(ss, handler)) + messages.swap(handler.messages_); // Only change it if success. + else { + ParseErrorCode e = reader.GetParseErrorCode(); + size_t o = reader.GetErrorOffset(); + cout << "Error: " << GetParseError_En(e) << endl;; + cout << " at offset " << o << " near '" << string(json).substr(o, 10) << "...'" << endl; + } +} + +int main() { + MessageMap messages; + + const char* json1 = "{ \"greeting\" : \"Hello!\", \"farewell\" : \"bye-bye!\" }"; + cout << json1 << endl; + ParseMessages(json1, messages); + + for (MessageMap::const_iterator itr = messages.begin(); itr != messages.end(); ++itr) + cout << itr->first << ": " << itr->second << endl; + + cout << endl << "Parse a JSON with invalid schema." << endl; + const char* json2 = "{ \"greeting\" : \"Hello!\", \"farewell\" : \"bye-bye!\", \"foo\" : {} }"; + cout << json2 << endl; + ParseMessages(json2, messages); + + return 0; +} diff --git a/src/rapidjson/example/parsebyparts/parsebyparts.cpp b/src/rapidjson/example/parsebyparts/parsebyparts.cpp new file mode 100644 index 000000000..57eed005d --- /dev/null +++ b/src/rapidjson/example/parsebyparts/parsebyparts.cpp @@ -0,0 +1,173 @@ +// Example of parsing JSON to document by parts. + +// Using C++11 threads +// Temporarily disable for clang (older version) due to incompatibility with libstdc++ +#if (__cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1700)) && !defined(__clang__) + +#include "rapidjson/document.h" +#include "rapidjson/error/en.h" +#include "rapidjson/writer.h" +#include "rapidjson/ostreamwrapper.h" +#include <condition_variable> +#include <iostream> +#include <mutex> +#include <thread> + +using namespace rapidjson; + +template<unsigned parseFlags = kParseDefaultFlags> +class AsyncDocumentParser { +public: + AsyncDocumentParser(Document& d) + : stream_(*this) + , d_(d) + , parseThread_(&AsyncDocumentParser::Parse, this) + , mutex_() + , notEmpty_() + , finish_() + , completed_() + {} + + ~AsyncDocumentParser() { + if (!parseThread_.joinable()) + return; + + { + std::unique_lock<std::mutex> lock(mutex_); + + // Wait until the buffer is read up (or parsing is completed) + while (!stream_.Empty() && !completed_) + finish_.wait(lock); + + // Automatically append '\0' as the terminator in the stream. + static const char terminator[] = ""; + stream_.src_ = terminator; + stream_.end_ = terminator + 1; + notEmpty_.notify_one(); // unblock the AsyncStringStream + } + + parseThread_.join(); + } + + void ParsePart(const char* buffer, size_t length) { + std::unique_lock<std::mutex> lock(mutex_); + + // Wait until the buffer is read up (or parsing is completed) + while (!stream_.Empty() && !completed_) + finish_.wait(lock); + + // Stop further parsing if the parsing process is completed. + if (completed_) + return; + + // Set the buffer to stream and unblock the AsyncStringStream + stream_.src_ = buffer; + stream_.end_ = buffer + length; + notEmpty_.notify_one(); + } + +private: + void Parse() { + d_.ParseStream<parseFlags>(stream_); + + // The stream may not be fully read, notify finish anyway to unblock ParsePart() + std::unique_lock<std::mutex> lock(mutex_); + completed_ = true; // Parsing process is completed + finish_.notify_one(); // Unblock ParsePart() or destructor if they are waiting. + } + + struct AsyncStringStream { + typedef char Ch; + + AsyncStringStream(AsyncDocumentParser& parser) : parser_(parser), src_(), end_(), count_() {} + + char Peek() const { + std::unique_lock<std::mutex> lock(parser_.mutex_); + + // If nothing in stream, block to wait. + while (Empty()) + parser_.notEmpty_.wait(lock); + + return *src_; + } + + char Take() { + std::unique_lock<std::mutex> lock(parser_.mutex_); + + // If nothing in stream, block to wait. + while (Empty()) + parser_.notEmpty_.wait(lock); + + count_++; + char c = *src_++; + + // If all stream is read up, notify that the stream is finish. + if (Empty()) + parser_.finish_.notify_one(); + + return c; + } + + size_t Tell() const { return count_; } + + // Not implemented + char* PutBegin() { return 0; } + void Put(char) {} + void Flush() {} + size_t PutEnd(char*) { return 0; } + + bool Empty() const { return src_ == end_; } + + AsyncDocumentParser& parser_; + const char* src_; //!< Current read position. + const char* end_; //!< End of buffer + size_t count_; //!< Number of characters taken so far. + }; + + AsyncStringStream stream_; + Document& d_; + std::thread parseThread_; + std::mutex mutex_; + std::condition_variable notEmpty_; + std::condition_variable finish_; + bool completed_; +}; + +int main() { + Document d; + + { + AsyncDocumentParser<> parser(d); + + const char json1[] = " { \"hello\" : \"world\", \"t\" : tr"; + //const char json1[] = " { \"hello\" : \"world\", \"t\" : trX"; // Fot test parsing error + const char json2[] = "ue, \"f\" : false, \"n\": null, \"i\":123, \"pi\": 3.14"; + const char json3[] = "16, \"a\":[1, 2, 3, 4] } "; + + parser.ParsePart(json1, sizeof(json1) - 1); + parser.ParsePart(json2, sizeof(json2) - 1); + parser.ParsePart(json3, sizeof(json3) - 1); + } + + if (d.HasParseError()) { + std::cout << "Error at offset " << d.GetErrorOffset() << ": " << GetParseError_En(d.GetParseError()) << std::endl; + return EXIT_FAILURE; + } + + // Stringify the JSON to cout + OStreamWrapper os(std::cout); + Writer<OStreamWrapper> writer(os); + d.Accept(writer); + std::cout << std::endl; + + return EXIT_SUCCESS; +} + +#else // Not supporting C++11 + +#include <iostream> +int main() { + std::cout << "This example requires C++11 compiler" << std::endl; +} + +#endif diff --git a/src/rapidjson/example/pretty/pretty.cpp b/src/rapidjson/example/pretty/pretty.cpp new file mode 100644 index 000000000..2feff5d02 --- /dev/null +++ b/src/rapidjson/example/pretty/pretty.cpp @@ -0,0 +1,30 @@ +// JSON pretty formatting example +// This example can only handle UTF-8. For handling other encodings, see prettyauto example. + +#include "rapidjson/reader.h" +#include "rapidjson/prettywriter.h" +#include "rapidjson/filereadstream.h" +#include "rapidjson/filewritestream.h" +#include "rapidjson/error/en.h" + +using namespace rapidjson; + +int main(int, char*[]) { + // Prepare reader and input stream. + Reader reader; + char readBuffer[65536]; + FileReadStream is(stdin, readBuffer, sizeof(readBuffer)); + + // Prepare writer and output stream. + char writeBuffer[65536]; + FileWriteStream os(stdout, writeBuffer, sizeof(writeBuffer)); + PrettyWriter<FileWriteStream> writer(os); + + // JSON reader parse from the input stream and let writer generate the output. + if (!reader.Parse<kParseValidateEncodingFlag>(is, writer)) { + fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode())); + return 1; + } + + return 0; +} diff --git a/src/rapidjson/example/prettyauto/prettyauto.cpp b/src/rapidjson/example/prettyauto/prettyauto.cpp new file mode 100644 index 000000000..1687bae55 --- /dev/null +++ b/src/rapidjson/example/prettyauto/prettyauto.cpp @@ -0,0 +1,56 @@ +// JSON pretty formatting example +// This example can handle UTF-8/UTF-16LE/UTF-16BE/UTF-32LE/UTF-32BE. +// The input firstly convert to UTF8, and then write to the original encoding with pretty formatting. + +#include "rapidjson/reader.h" +#include "rapidjson/prettywriter.h" +#include "rapidjson/filereadstream.h" +#include "rapidjson/filewritestream.h" +#include "rapidjson/encodedstream.h" // NEW +#include "rapidjson/error/en.h" +#ifdef _WIN32 +#include <fcntl.h> +#include <io.h> +#endif + +using namespace rapidjson; + +int main(int, char*[]) { +#ifdef _WIN32 + // Prevent Windows converting between CR+LF and LF + _setmode(_fileno(stdin), _O_BINARY); // NEW + _setmode(_fileno(stdout), _O_BINARY); // NEW +#endif + + // Prepare reader and input stream. + //Reader reader; + GenericReader<AutoUTF<unsigned>, UTF8<> > reader; // CHANGED + char readBuffer[65536]; + FileReadStream is(stdin, readBuffer, sizeof(readBuffer)); + AutoUTFInputStream<unsigned, FileReadStream> eis(is); // NEW + + // Prepare writer and output stream. + char writeBuffer[65536]; + FileWriteStream os(stdout, writeBuffer, sizeof(writeBuffer)); + +#if 1 + // Use the same Encoding of the input. Also use BOM according to input. + typedef AutoUTFOutputStream<unsigned, FileWriteStream> OutputStream; // NEW + OutputStream eos(os, eis.GetType(), eis.HasBOM()); // NEW + PrettyWriter<OutputStream, UTF8<>, AutoUTF<unsigned> > writer(eos); // CHANGED +#else + // You may also use static bound encoding type, such as output to UTF-16LE with BOM + typedef EncodedOutputStream<UTF16LE<>,FileWriteStream> OutputStream; // NEW + OutputStream eos(os, true); // NEW + PrettyWriter<OutputStream, UTF8<>, UTF16LE<> > writer(eos); // CHANGED +#endif + + // JSON reader parse from the input stream and let writer generate the output. + //if (!reader.Parse<kParseValidateEncodingFlag>(is, writer)) { + if (!reader.Parse<kParseValidateEncodingFlag>(eis, writer)) { // CHANGED + fprintf(stderr, "\nError(%u): %s\n", static_cast<unsigned>(reader.GetErrorOffset()), GetParseError_En(reader.GetParseErrorCode())); + return 1; + } + + return 0; +} diff --git a/src/rapidjson/example/schemavalidator/schemavalidator.cpp b/src/rapidjson/example/schemavalidator/schemavalidator.cpp new file mode 100644 index 000000000..ce36ea95f --- /dev/null +++ b/src/rapidjson/example/schemavalidator/schemavalidator.cpp @@ -0,0 +1,72 @@ +// Schema Validator example + +// The example validates JSON text from stdin with a JSON schema specified in the argument. + +#include "rapidjson/error/en.h" +#include "rapidjson/filereadstream.h" +#include "rapidjson/schema.h" +#include "rapidjson/stringbuffer.h" + +using namespace rapidjson; + +int main(int argc, char *argv[]) { + if (argc != 2) { + fprintf(stderr, "Usage: schemavalidator schema.json < input.json\n"); + return EXIT_FAILURE; + } + + // Read a JSON schema from file into Document + Document d; + char buffer[4096]; + + { + FILE *fp = fopen(argv[1], "r"); + if (!fp) { + printf("Schema file '%s' not found\n", argv[1]); + return -1; + } + FileReadStream fs(fp, buffer, sizeof(buffer)); + d.ParseStream(fs); + if (d.HasParseError()) { + fprintf(stderr, "Schema file '%s' is not a valid JSON\n", argv[1]); + fprintf(stderr, "Error(offset %u): %s\n", + static_cast<unsigned>(d.GetErrorOffset()), + GetParseError_En(d.GetParseError())); + fclose(fp); + return EXIT_FAILURE; + } + fclose(fp); + } + + // Then convert the Document into SchemaDocument + SchemaDocument sd(d); + + // Use reader to parse the JSON in stdin, and forward SAX events to validator + SchemaValidator validator(sd); + Reader reader; + FileReadStream is(stdin, buffer, sizeof(buffer)); + if (!reader.Parse(is, validator) && reader.GetParseErrorCode() != kParseErrorTermination) { + // Schema validator error would cause kParseErrorTermination, which will handle it in next step. + fprintf(stderr, "Input is not a valid JSON\n"); + fprintf(stderr, "Error(offset %u): %s\n", + static_cast<unsigned>(reader.GetErrorOffset()), + GetParseError_En(reader.GetParseErrorCode())); + } + + // Check the validation result + if (validator.IsValid()) { + printf("Input JSON is valid.\n"); + return EXIT_SUCCESS; + } + else { + printf("Input JSON is invalid.\n"); + StringBuffer sb; + validator.GetInvalidSchemaPointer().StringifyUriFragment(sb); + fprintf(stderr, "Invalid schema: %s\n", sb.GetString()); + fprintf(stderr, "Invalid keyword: %s\n", validator.GetInvalidSchemaKeyword()); + sb.Clear(); + validator.GetInvalidDocumentPointer().StringifyUriFragment(sb); + fprintf(stderr, "Invalid document: %s\n", sb.GetString()); + return EXIT_FAILURE; + } +} diff --git a/src/rapidjson/example/serialize/serialize.cpp b/src/rapidjson/example/serialize/serialize.cpp new file mode 100644 index 000000000..12d87151e --- /dev/null +++ b/src/rapidjson/example/serialize/serialize.cpp @@ -0,0 +1,173 @@ +// Serialize example +// This example shows writing JSON string with writer directly. + +#include "rapidjson/prettywriter.h" // for stringify JSON +#include <cstdio> +#include <string> +#include <vector> + +using namespace rapidjson; + +class Person { +public: + Person(const std::string& name, unsigned age) : name_(name), age_(age) {} + Person(const Person& rhs) : name_(rhs.name_), age_(rhs.age_) {} + virtual ~Person(); + + Person& operator=(const Person& rhs) { + name_ = rhs.name_; + age_ = rhs.age_; + return *this; + } + +protected: + template <typename Writer> + void Serialize(Writer& writer) const { + // This base class just write out name-value pairs, without wrapping within an object. + writer.String("name"); +#if RAPIDJSON_HAS_STDSTRING + writer.String(name_); +#else + writer.String(name_.c_str(), static_cast<SizeType>(name_.length())); // Supplying length of string is faster. +#endif + writer.String("age"); + writer.Uint(age_); + } + +private: + std::string name_; + unsigned age_; +}; + +Person::~Person() { +} + +class Education { +public: + Education(const std::string& school, double GPA) : school_(school), GPA_(GPA) {} + Education(const Education& rhs) : school_(rhs.school_), GPA_(rhs.GPA_) {} + + template <typename Writer> + void Serialize(Writer& writer) const { + writer.StartObject(); + + writer.String("school"); +#if RAPIDJSON_HAS_STDSTRING + writer.String(school_); +#else + writer.String(school_.c_str(), static_cast<SizeType>(school_.length())); +#endif + + writer.String("GPA"); + writer.Double(GPA_); + + writer.EndObject(); + } + +private: + std::string school_; + double GPA_; +}; + +class Dependent : public Person { +public: + Dependent(const std::string& name, unsigned age, Education* education = 0) : Person(name, age), education_(education) {} + Dependent(const Dependent& rhs) : Person(rhs), education_(0) { education_ = (rhs.education_ == 0) ? 0 : new Education(*rhs.education_); } + virtual ~Dependent(); + + Dependent& operator=(const Dependent& rhs) { + if (this == &rhs) + return *this; + delete education_; + education_ = (rhs.education_ == 0) ? 0 : new Education(*rhs.education_); + return *this; + } + + template <typename Writer> + void Serialize(Writer& writer) const { + writer.StartObject(); + + Person::Serialize(writer); + + writer.String("education"); + if (education_) + education_->Serialize(writer); + else + writer.Null(); + + writer.EndObject(); + } + +private: + + Education *education_; +}; + +Dependent::~Dependent() { + delete education_; +} + +class Employee : public Person { +public: + Employee(const std::string& name, unsigned age, bool married) : Person(name, age), dependents_(), married_(married) {} + Employee(const Employee& rhs) : Person(rhs), dependents_(rhs.dependents_), married_(rhs.married_) {} + virtual ~Employee(); + + Employee& operator=(const Employee& rhs) { + static_cast<Person&>(*this) = rhs; + dependents_ = rhs.dependents_; + married_ = rhs.married_; + return *this; + } + + void AddDependent(const Dependent& dependent) { + dependents_.push_back(dependent); + } + + template <typename Writer> + void Serialize(Writer& writer) const { + writer.StartObject(); + + Person::Serialize(writer); + + writer.String("married"); + writer.Bool(married_); + + writer.String(("dependents")); + writer.StartArray(); + for (std::vector<Dependent>::const_iterator dependentItr = dependents_.begin(); dependentItr != dependents_.end(); ++dependentItr) + dependentItr->Serialize(writer); + writer.EndArray(); + + writer.EndObject(); + } + +private: + std::vector<Dependent> dependents_; + bool married_; +}; + +Employee::~Employee() { +} + +int main(int, char*[]) { + std::vector<Employee> employees; + + employees.push_back(Employee("Milo YIP", 34, true)); + employees.back().AddDependent(Dependent("Lua YIP", 3, new Education("Happy Kindergarten", 3.5))); + employees.back().AddDependent(Dependent("Mio YIP", 1)); + + employees.push_back(Employee("Percy TSE", 30, false)); + + StringBuffer sb; + PrettyWriter<StringBuffer> writer(sb); + + writer.StartArray(); + for (std::vector<Employee>::const_iterator employeeItr = employees.begin(); employeeItr != employees.end(); ++employeeItr) + employeeItr->Serialize(writer); + writer.EndArray(); + + puts(sb.GetString()); + + return 0; +} diff --git a/src/rapidjson/example/simpledom/simpledom.cpp b/src/rapidjson/example/simpledom/simpledom.cpp new file mode 100644 index 000000000..80384199a --- /dev/null +++ b/src/rapidjson/example/simpledom/simpledom.cpp @@ -0,0 +1,29 @@ +// JSON simple example +// This example does not handle errors. + +#include "rapidjson/document.h" +#include "rapidjson/writer.h" +#include "rapidjson/stringbuffer.h" +#include <iostream> + +using namespace rapidjson; + +int main() { + // 1. Parse a JSON string into DOM. + const char* json = "{\"project\":\"rapidjson\",\"stars\":10}"; + Document d; + d.Parse(json); + + // 2. Modify it by DOM. + Value& s = d["stars"]; + s.SetInt(s.GetInt() + 1); + + // 3. Stringify the DOM + StringBuffer buffer; + Writer<StringBuffer> writer(buffer); + d.Accept(writer); + + // Output {"project":"rapidjson","stars":11} + std::cout << buffer.GetString() << std::endl; + return 0; +} diff --git a/src/rapidjson/example/simplereader/simplereader.cpp b/src/rapidjson/example/simplereader/simplereader.cpp new file mode 100644 index 000000000..5aae8a1c0 --- /dev/null +++ b/src/rapidjson/example/simplereader/simplereader.cpp @@ -0,0 +1,42 @@ +#include "rapidjson/reader.h" +#include <iostream> + +using namespace rapidjson; +using namespace std; + +struct MyHandler { + bool Null() { cout << "Null()" << endl; return true; } + bool Bool(bool b) { cout << "Bool(" << boolalpha << b << ")" << endl; return true; } + bool Int(int i) { cout << "Int(" << i << ")" << endl; return true; } + bool Uint(unsigned u) { cout << "Uint(" << u << ")" << endl; return true; } + bool Int64(int64_t i) { cout << "Int64(" << i << ")" << endl; return true; } + bool Uint64(uint64_t u) { cout << "Uint64(" << u << ")" << endl; return true; } + bool Double(double d) { cout << "Double(" << d << ")" << endl; return true; } + bool RawNumber(const char* str, SizeType length, bool copy) { + cout << "Number(" << str << ", " << length << ", " << boolalpha << copy << ")" << endl; + return true; + } + bool String(const char* str, SizeType length, bool copy) { + cout << "String(" << str << ", " << length << ", " << boolalpha << copy << ")" << endl; + return true; + } + bool StartObject() { cout << "StartObject()" << endl; return true; } + bool Key(const char* str, SizeType length, bool copy) { + cout << "Key(" << str << ", " << length << ", " << boolalpha << copy << ")" << endl; + return true; + } + bool EndObject(SizeType memberCount) { cout << "EndObject(" << memberCount << ")" << endl; return true; } + bool StartArray() { cout << "StartArray()" << endl; return true; } + bool EndArray(SizeType elementCount) { cout << "EndArray(" << elementCount << ")" << endl; return true; } +}; + +int main() { + const char json[] = " { \"hello\" : \"world\", \"t\" : true , \"f\" : false, \"n\": null, \"i\":123, \"pi\": 3.1416, \"a\":[1, 2, 3, 4] } "; + + MyHandler handler; + Reader reader; + StringStream ss(json); + reader.Parse(ss, handler); + + return 0; +} diff --git a/src/rapidjson/example/simplewriter/simplewriter.cpp b/src/rapidjson/example/simplewriter/simplewriter.cpp new file mode 100644 index 000000000..8d1275c29 --- /dev/null +++ b/src/rapidjson/example/simplewriter/simplewriter.cpp @@ -0,0 +1,36 @@ +#include "rapidjson/writer.h" +#include "rapidjson/stringbuffer.h" +#include <iostream> + +using namespace rapidjson; +using namespace std; + +int main() { + StringBuffer s; + Writer<StringBuffer> writer(s); + + writer.StartObject(); // Between StartObject()/EndObject(), + writer.Key("hello"); // output a key, + writer.String("world"); // follow by a value. + writer.Key("t"); + writer.Bool(true); + writer.Key("f"); + writer.Bool(false); + writer.Key("n"); + writer.Null(); + writer.Key("i"); + writer.Uint(123); + writer.Key("pi"); + writer.Double(3.1416); + writer.Key("a"); + writer.StartArray(); // Between StartArray()/EndArray(), + for (unsigned i = 0; i < 4; i++) + writer.Uint(i); // all values are elements of the array. + writer.EndArray(); + writer.EndObject(); + + // {"hello":"world","t":true,"f":false,"n":null,"i":123,"pi":3.1416,"a":[0,1,2,3]} + cout << s.GetString() << endl; + + return 0; +} diff --git a/src/rapidjson/example/tutorial/tutorial.cpp b/src/rapidjson/example/tutorial/tutorial.cpp new file mode 100644 index 000000000..c8bfcc14c --- /dev/null +++ b/src/rapidjson/example/tutorial/tutorial.cpp @@ -0,0 +1,151 @@ +// Hello World example +// This example shows basic usage of DOM-style API. + +#include "rapidjson/document.h" // rapidjson's DOM-style API +#include "rapidjson/prettywriter.h" // for stringify JSON +#include <cstdio> + +using namespace rapidjson; +using namespace std; + +int main(int, char*[]) { + //////////////////////////////////////////////////////////////////////////// + // 1. Parse a JSON text string to a document. + + const char json[] = " { \"hello\" : \"world\", \"t\" : true , \"f\" : false, \"n\": null, \"i\":123, \"pi\": 3.1416, \"a\":[1, 2, 3, 4] } "; + printf("Original JSON:\n %s\n", json); + + Document document; // Default template parameter uses UTF8 and MemoryPoolAllocator. + +#if 0 + // "normal" parsing, decode strings to new buffers. Can use other input stream via ParseStream(). + if (document.Parse(json).HasParseError()) + return 1; +#else + // In-situ parsing, decode strings directly in the source string. Source must be string. + char buffer[sizeof(json)]; + memcpy(buffer, json, sizeof(json)); + if (document.ParseInsitu(buffer).HasParseError()) + return 1; +#endif + + printf("\nParsing to document succeeded.\n"); + + //////////////////////////////////////////////////////////////////////////// + // 2. Access values in document. + + printf("\nAccess values in document:\n"); + assert(document.IsObject()); // Document is a JSON value represents the root of DOM. Root can be either an object or array. + + assert(document.HasMember("hello")); + assert(document["hello"].IsString()); + printf("hello = %s\n", document["hello"].GetString()); + + // Since version 0.2, you can use single lookup to check the existing of member and its value: + Value::MemberIterator hello = document.FindMember("hello"); + assert(hello != document.MemberEnd()); + assert(hello->value.IsString()); + assert(strcmp("world", hello->value.GetString()) == 0); + (void)hello; + + assert(document["t"].IsBool()); // JSON true/false are bool. Can also uses more specific function IsTrue(). + printf("t = %s\n", document["t"].GetBool() ? "true" : "false"); + + assert(document["f"].IsBool()); + printf("f = %s\n", document["f"].GetBool() ? "true" : "false"); + + printf("n = %s\n", document["n"].IsNull() ? "null" : "?"); + + assert(document["i"].IsNumber()); // Number is a JSON type, but C++ needs more specific type. + assert(document["i"].IsInt()); // In this case, IsUint()/IsInt64()/IsUInt64() also return true. + printf("i = %d\n", document["i"].GetInt()); // Alternative (int)document["i"] + + assert(document["pi"].IsNumber()); + assert(document["pi"].IsDouble()); + printf("pi = %g\n", document["pi"].GetDouble()); + + { + const Value& a = document["a"]; // Using a reference for consecutive access is handy and faster. + assert(a.IsArray()); + for (SizeType i = 0; i < a.Size(); i++) // rapidjson uses SizeType instead of size_t. + printf("a[%d] = %d\n", i, a[i].GetInt()); + + int y = a[0].GetInt(); + (void)y; + + // Iterating array with iterators + printf("a = "); + for (Value::ConstValueIterator itr = a.Begin(); itr != a.End(); ++itr) + printf("%d ", itr->GetInt()); + printf("\n"); + } + + // Iterating object members + static const char* kTypeNames[] = { "Null", "False", "True", "Object", "Array", "String", "Number" }; + for (Value::ConstMemberIterator itr = document.MemberBegin(); itr != document.MemberEnd(); ++itr) + printf("Type of member %s is %s\n", itr->name.GetString(), kTypeNames[itr->value.GetType()]); + + //////////////////////////////////////////////////////////////////////////// + // 3. Modify values in document. + + // Change i to a bigger number + { + uint64_t f20 = 1; // compute factorial of 20 + for (uint64_t j = 1; j <= 20; j++) + f20 *= j; + document["i"] = f20; // Alternate form: document["i"].SetUint64(f20) + assert(!document["i"].IsInt()); // No longer can be cast as int or uint. + } + + // Adding values to array. + { + Value& a = document["a"]; // This time we uses non-const reference. + Document::AllocatorType& allocator = document.GetAllocator(); + for (int i = 5; i <= 10; i++) + a.PushBack(i, allocator); // May look a bit strange, allocator is needed for potentially realloc. We normally uses the document's. + + // Fluent API + a.PushBack("Lua", allocator).PushBack("Mio", allocator); + } + + // Making string values. + + // This version of SetString() just store the pointer to the string. + // So it is for literal and string that exists within value's life-cycle. + { + document["hello"] = "rapidjson"; // This will invoke strlen() + // Faster version: + // document["hello"].SetString("rapidjson", 9); + } + + // This version of SetString() needs an allocator, which means it will allocate a new buffer and copy the the string into the buffer. + Value author; + { + char buffer2[10]; + int len = sprintf(buffer2, "%s %s", "Milo", "Yip"); // synthetic example of dynamically created string. + + author.SetString(buffer2, static_cast<SizeType>(len), document.GetAllocator()); + // Shorter but slower version: + // document["hello"].SetString(buffer, document.GetAllocator()); + + // Constructor version: + // Value author(buffer, len, document.GetAllocator()); + // Value author(buffer, document.GetAllocator()); + memset(buffer2, 0, sizeof(buffer2)); // For demonstration purpose. + } + // Variable 'buffer' is unusable now but 'author' has already made a copy. + document.AddMember("author", author, document.GetAllocator()); + + assert(author.IsNull()); // Move semantic for assignment. After this variable is assigned as a member, the variable becomes null. + + //////////////////////////////////////////////////////////////////////////// + // 4. Stringify JSON + + printf("\nModified JSON with reformatting:\n"); + StringBuffer sb; + PrettyWriter<StringBuffer> writer(sb); + document.Accept(writer); // Accept() traverses the DOM and generates Handler events. + puts(sb.GetString()); + + return 0; +} |