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-rw-r--r--tools/debugserver/source/JSON.cpp585
1 files changed, 0 insertions, 585 deletions
diff --git a/tools/debugserver/source/JSON.cpp b/tools/debugserver/source/JSON.cpp
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index 439918b6fcc4..000000000000
--- a/tools/debugserver/source/JSON.cpp
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-//===--------------------- JSON.cpp -----------------------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "JSON.h"
-
-// C includes
-#include <assert.h>
-#include <limits.h>
-
-// C++ includes
-#include "lldb/Host/StringConvert.h"
-#include <iomanip>
-#include <sstream>
-
-using namespace lldb_private;
-
-std::string JSONString::json_string_quote_metachars(const std::string &s) {
- if (s.find('"') == std::string::npos)
- return s;
-
- std::string output;
- const size_t s_size = s.size();
- const char *s_chars = s.c_str();
- for (size_t i = 0; i < s_size; i++) {
- unsigned char ch = *(s_chars + i);
- if (ch == '"') {
- output.push_back('\\');
- }
- output.push_back(ch);
- }
- return output;
-}
-
-JSONString::JSONString() : JSONValue(JSONValue::Kind::String), m_data() {}
-
-JSONString::JSONString(const char *s)
- : JSONValue(JSONValue::Kind::String), m_data(s ? s : "") {}
-
-JSONString::JSONString(const std::string &s)
- : JSONValue(JSONValue::Kind::String), m_data(s) {}
-
-void JSONString::Write(std::ostream &s) {
- s << "\"" << json_string_quote_metachars(m_data).c_str() << "\"";
-}
-
-uint64_t JSONNumber::GetAsUnsigned() const {
- switch (m_data_type) {
- case DataType::Unsigned:
- return m_data.m_unsigned;
- case DataType::Signed:
- return (uint64_t)m_data.m_signed;
- case DataType::Double:
- return (uint64_t)m_data.m_double;
- }
-}
-
-int64_t JSONNumber::GetAsSigned() const {
- switch (m_data_type) {
- case DataType::Unsigned:
- return (int64_t)m_data.m_unsigned;
- case DataType::Signed:
- return m_data.m_signed;
- case DataType::Double:
- return (int64_t)m_data.m_double;
- }
-}
-
-double JSONNumber::GetAsDouble() const {
- switch (m_data_type) {
- case DataType::Unsigned:
- return (double)m_data.m_unsigned;
- case DataType::Signed:
- return (double)m_data.m_signed;
- case DataType::Double:
- return m_data.m_double;
- }
-}
-
-void JSONNumber::Write(std::ostream &s) {
- switch (m_data_type) {
- case DataType::Unsigned:
- s << m_data.m_unsigned;
- break;
- case DataType::Signed:
- s << m_data.m_signed;
- break;
- case DataType::Double:
- // Set max precision to emulate %g.
- s << std::setprecision(std::numeric_limits<double>::digits10 + 1);
- s << m_data.m_double;
- break;
- }
-}
-
-JSONTrue::JSONTrue() : JSONValue(JSONValue::Kind::True) {}
-
-void JSONTrue::Write(std::ostream &s) { s << "true"; }
-
-JSONFalse::JSONFalse() : JSONValue(JSONValue::Kind::False) {}
-
-void JSONFalse::Write(std::ostream &s) { s << "false"; }
-
-JSONNull::JSONNull() : JSONValue(JSONValue::Kind::Null) {}
-
-void JSONNull::Write(std::ostream &s) { s << "null"; }
-
-JSONObject::JSONObject() : JSONValue(JSONValue::Kind::Object) {}
-
-void JSONObject::Write(std::ostream &s) {
- bool first = true;
- s << '{';
- auto iter = m_elements.begin(), end = m_elements.end();
- for (; iter != end; iter++) {
- if (first)
- first = false;
- else
- s << ',';
- JSONString key(iter->first);
- JSONValue::SP value(iter->second);
- key.Write(s);
- s << ':';
- value->Write(s);
- }
- s << '}';
-}
-
-bool JSONObject::SetObject(const std::string &key, JSONValue::SP value) {
- if (key.empty() || nullptr == value.get())
- return false;
- m_elements[key] = value;
- return true;
-}
-
-JSONValue::SP JSONObject::GetObject(const std::string &key) const {
- auto iter = m_elements.find(key), end = m_elements.end();
- if (iter == end)
- return JSONValue::SP();
- return iter->second;
-}
-
-bool JSONObject::GetObjectAsBool(const std::string &key, bool &value) const {
- auto value_sp = GetObject(key);
- if (!value_sp) {
- // The given key doesn't exist, so we have no value.
- return false;
- }
-
- if (JSONTrue::classof(value_sp.get())) {
- // We have the value, and it is true.
- value = true;
- return true;
- } else if (JSONFalse::classof(value_sp.get())) {
- // We have the value, and it is false.
- value = false;
- return true;
- } else {
- // We don't have a valid bool value for the given key.
- return false;
- }
-}
-
-bool JSONObject::GetObjectAsString(const std::string &key,
- std::string &value) const {
- auto value_sp = GetObject(key);
- if (!value_sp) {
- // The given key doesn't exist, so we have no value.
- return false;
- }
-
- if (!JSONString::classof(value_sp.get()))
- return false;
-
- value = static_cast<JSONString *>(value_sp.get())->GetData();
- return true;
-}
-
-JSONArray::JSONArray() : JSONValue(JSONValue::Kind::Array) {}
-
-void JSONArray::Write(std::ostream &s) {
- bool first = true;
- s << '[';
- auto iter = m_elements.begin(), end = m_elements.end();
- for (; iter != end; iter++) {
- if (first)
- first = false;
- else
- s << ',';
- (*iter)->Write(s);
- }
- s << ']';
-}
-
-bool JSONArray::SetObject(Index i, JSONValue::SP value) {
- if (value.get() == nullptr)
- return false;
- if (i < m_elements.size()) {
- m_elements[i] = value;
- return true;
- }
- if (i == m_elements.size()) {
- m_elements.push_back(value);
- return true;
- }
- return false;
-}
-
-bool JSONArray::AppendObject(JSONValue::SP value) {
- if (value.get() == nullptr)
- return false;
- m_elements.push_back(value);
- return true;
-}
-
-JSONValue::SP JSONArray::GetObject(Index i) {
- if (i < m_elements.size())
- return m_elements[i];
- return JSONValue::SP();
-}
-
-JSONArray::Size JSONArray::GetNumElements() { return m_elements.size(); }
-
-JSONParser::JSONParser(const char *cstr) : StdStringExtractor(cstr) {}
-
-JSONParser::Token JSONParser::GetToken(std::string &value) {
- std::ostringstream error;
-
- value.clear();
- SkipSpaces();
- const uint64_t start_index = m_index;
- const char ch = GetChar();
- switch (ch) {
- case '{':
- return Token::ObjectStart;
- case '}':
- return Token::ObjectEnd;
- case '[':
- return Token::ArrayStart;
- case ']':
- return Token::ArrayEnd;
- case ',':
- return Token::Comma;
- case ':':
- return Token::Colon;
- case '\0':
- return Token::EndOfFile;
- case 't':
- if (GetChar() == 'r')
- if (GetChar() == 'u')
- if (GetChar() == 'e')
- return Token::True;
- break;
-
- case 'f':
- if (GetChar() == 'a')
- if (GetChar() == 'l')
- if (GetChar() == 's')
- if (GetChar() == 'e')
- return Token::False;
- break;
-
- case 'n':
- if (GetChar() == 'u')
- if (GetChar() == 'l')
- if (GetChar() == 'l')
- return Token::Null;
- break;
-
- case '"': {
- while (1) {
- bool was_escaped = false;
- int escaped_ch = GetEscapedChar(was_escaped);
- if (escaped_ch == -1) {
- error << "error: an error occurred getting a character from offset "
- << start_index;
- value = error.str();
- return Token::Status;
-
- } else {
- const bool is_end_quote = escaped_ch == '"';
- const bool is_null = escaped_ch == 0;
- if (was_escaped || (!is_end_quote && !is_null)) {
- if (CHAR_MIN <= escaped_ch && escaped_ch <= CHAR_MAX) {
- value.append(1, (char)escaped_ch);
- } else {
- error << "error: wide character support is needed for unicode "
- "character 0x"
- << std::setprecision(4) << std::hex << escaped_ch;
- error << " at offset " << start_index;
- value = error.str();
- return Token::Status;
- }
- } else if (is_end_quote) {
- return Token::String;
- } else if (is_null) {
- value = "error: missing end quote for string";
- return Token::Status;
- }
- }
- }
- } break;
-
- case '-':
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9': {
- bool done = false;
- bool got_decimal_point = false;
- uint64_t exp_index = 0;
- bool got_int_digits = (ch >= '0') && (ch <= '9');
- bool got_frac_digits = false;
- bool got_exp_digits = false;
- while (!done) {
- const char next_ch = PeekChar();
- switch (next_ch) {
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- if (exp_index != 0) {
- got_exp_digits = true;
- } else if (got_decimal_point) {
- got_frac_digits = true;
- } else {
- got_int_digits = true;
- }
- ++m_index; // Skip this character
- break;
-
- case '.':
- if (got_decimal_point) {
- error << "error: extra decimal point found at offset " << start_index;
- value = error.str();
- return Token::Status;
- } else {
- got_decimal_point = true;
- ++m_index; // Skip this character
- }
- break;
-
- case 'e':
- case 'E':
- if (exp_index != 0) {
- error << "error: extra exponent character found at offset "
- << start_index;
- value = error.str();
- return Token::Status;
- } else {
- exp_index = m_index;
- ++m_index; // Skip this character
- }
- break;
-
- case '+':
- case '-':
- // The '+' and '-' can only come after an exponent character...
- if (exp_index == m_index - 1) {
- ++m_index; // Skip the exponent sign character
- } else {
- error << "error: unexpected " << next_ch << " character at offset "
- << start_index;
- value = error.str();
- return Token::Status;
- }
- break;
-
- default:
- done = true;
- break;
- }
- }
-
- if (m_index > start_index) {
- value = m_packet.substr(start_index, m_index - start_index);
- if (got_decimal_point) {
- if (exp_index != 0) {
- // We have an exponent, make sure we got exponent digits
- if (got_exp_digits) {
- return Token::Float;
- } else {
- error << "error: got exponent character but no exponent digits at "
- "offset in float value \""
- << value.c_str() << "\"";
- value = error.str();
- return Token::Status;
- }
- } else {
- // No exponent, but we need at least one decimal after the decimal
- // point
- if (got_frac_digits) {
- return Token::Float;
- } else {
- error << "error: no digits after decimal point \"" << value.c_str()
- << "\"";
- value = error.str();
- return Token::Status;
- }
- }
- } else {
- // No decimal point
- if (got_int_digits) {
- // We need at least some integer digits to make an integer
- return Token::Integer;
- } else {
- error << "error: no digits negate sign \"" << value.c_str() << "\"";
- value = error.str();
- return Token::Status;
- }
- }
- } else {
- error << "error: invalid number found at offset " << start_index;
- value = error.str();
- return Token::Status;
- }
- } break;
- default:
- break;
- }
- error << "error: failed to parse token at offset " << start_index
- << " (around character '" << ch << "')";
- value = error.str();
- return Token::Status;
-}
-
-int JSONParser::GetEscapedChar(bool &was_escaped) {
- was_escaped = false;
- const char ch = GetChar();
- if (ch == '\\') {
- was_escaped = true;
- const char ch2 = GetChar();
- switch (ch2) {
- case '"':
- case '\\':
- case '/':
- default:
- break;
-
- case 'b':
- return '\b';
- case 'f':
- return '\f';
- case 'n':
- return '\n';
- case 'r':
- return '\r';
- case 't':
- return '\t';
- case 'u': {
- const int hi_byte = DecodeHexU8();
- const int lo_byte = DecodeHexU8();
- if (hi_byte >= 0 && lo_byte >= 0)
- return hi_byte << 8 | lo_byte;
- return -1;
- } break;
- }
- return ch2;
- }
- return ch;
-}
-
-JSONValue::SP JSONParser::ParseJSONObject() {
- // The "JSONParser::Token::ObjectStart" token should have already been
- // consumed
- // by the time this function is called
- std::unique_ptr<JSONObject> dict_up(new JSONObject());
-
- std::string value;
- std::string key;
- while (1) {
- JSONParser::Token token = GetToken(value);
-
- if (token == JSONParser::Token::String) {
- key.swap(value);
- token = GetToken(value);
- if (token == JSONParser::Token::Colon) {
- JSONValue::SP value_sp = ParseJSONValue();
- if (value_sp)
- dict_up->SetObject(key, value_sp);
- else
- break;
- }
- } else if (token == JSONParser::Token::ObjectEnd) {
- return JSONValue::SP(dict_up.release());
- } else if (token == JSONParser::Token::Comma) {
- continue;
- } else {
- break;
- }
- }
- return JSONValue::SP();
-}
-
-JSONValue::SP JSONParser::ParseJSONArray() {
- // The "JSONParser::Token::ObjectStart" token should have already been
- // consumed
- // by the time this function is called
- std::unique_ptr<JSONArray> array_up(new JSONArray());
-
- std::string value;
- std::string key;
- while (1) {
- JSONValue::SP value_sp = ParseJSONValue();
- if (value_sp)
- array_up->AppendObject(value_sp);
- else
- break;
-
- JSONParser::Token token = GetToken(value);
- if (token == JSONParser::Token::Comma) {
- continue;
- } else if (token == JSONParser::Token::ArrayEnd) {
- return JSONValue::SP(array_up.release());
- } else {
- break;
- }
- }
- return JSONValue::SP();
-}
-
-JSONValue::SP JSONParser::ParseJSONValue() {
- std::string value;
- const JSONParser::Token token = GetToken(value);
- switch (token) {
- case JSONParser::Token::ObjectStart:
- return ParseJSONObject();
-
- case JSONParser::Token::ArrayStart:
- return ParseJSONArray();
-
- case JSONParser::Token::Integer: {
- if (value.front() == '-') {
- bool success = false;
- int64_t sval = StringConvert::ToSInt64(value.c_str(), 0, 0, &success);
- if (success)
- return JSONValue::SP(new JSONNumber(sval));
- } else {
- bool success = false;
- uint64_t uval = StringConvert::ToUInt64(value.c_str(), 0, 0, &success);
- if (success)
- return JSONValue::SP(new JSONNumber(uval));
- }
- } break;
-
- case JSONParser::Token::Float: {
- bool success = false;
- double val = StringConvert::ToDouble(value.c_str(), 0.0, &success);
- if (success)
- return JSONValue::SP(new JSONNumber(val));
- } break;
-
- case JSONParser::Token::String:
- return JSONValue::SP(new JSONString(value));
-
- case JSONParser::Token::True:
- return JSONValue::SP(new JSONTrue());
-
- case JSONParser::Token::False:
- return JSONValue::SP(new JSONFalse());
-
- case JSONParser::Token::Null:
- return JSONValue::SP(new JSONNull());
-
- default:
- break;
- }
- return JSONValue::SP();
-}