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Diffstat (limited to 'tools/debugserver/source/JSON.cpp')
-rw-r--r-- | tools/debugserver/source/JSON.cpp | 585 |
1 files changed, 0 insertions, 585 deletions
diff --git a/tools/debugserver/source/JSON.cpp b/tools/debugserver/source/JSON.cpp deleted file mode 100644 index 439918b6fcc4..000000000000 --- a/tools/debugserver/source/JSON.cpp +++ /dev/null @@ -1,585 +0,0 @@ -//===--------------------- 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(); -} |