435 lines
11 KiB
C++
435 lines
11 KiB
C++
#include "table.h"
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#include <fstream>
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#include "convert.h"
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#include "unicode.h"
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#include "streams.h"
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#include "lexal.h"
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#include "exceptions.h"
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class IntValue: public Value
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{
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private:
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int value;
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public:
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IntValue(int val) { value = val; };
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virtual ~IntValue() { };
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public:
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virtual Type getType() const { return Value::Integer; };
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virtual int asInt() const { return value; };
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virtual double asDouble() const { return value; };
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virtual std::wstring asString() const { return toString(value); };
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virtual ::Table* asTable() const {
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throw Exception(L"Can't convert integer to table");
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};
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virtual Value* clone() const { return new IntValue(value); };
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};
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class DoubleValue: public Value
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{
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private:
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double value;
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public:
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DoubleValue(double val) { value = val; };
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virtual ~DoubleValue() { };
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public:
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virtual Type getType() const { return Value::Double; };
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virtual int asInt() const { return (int)value; };
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virtual double asDouble() const { return value; };
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virtual std::wstring asString() const { return toString(value); };
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virtual ::Table* asTable() const {
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throw Exception(L"Can't convert double to table");
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};
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virtual Value* clone() const { return new DoubleValue(value); };
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};
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class StringValue: public Value
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{
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private:
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std::wstring value;
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public:
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StringValue(const std::wstring& val): value(val) { };
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virtual ~StringValue() { };
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public:
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virtual Type getType() const { return Value::String; };
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virtual int asInt() const { return strToInt(value); };
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virtual double asDouble() const { return strToDouble(value); };
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virtual std::wstring asString() const { return value; };
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virtual ::Table* asTable() const {
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throw Exception(L"Can't convert string to table");
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};
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virtual Value* clone() const { return new StringValue(value); };
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};
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class TableValue: public Value
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{
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private:
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::Table *value;
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public:
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TableValue(::Table *val) { value = val; };
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virtual ~TableValue() { delete value; };
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public:
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virtual Type getType() const { return Value::Table; };
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virtual int asInt() const {
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throw Exception(L"Can't convert table to int");
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};
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virtual double asDouble() const {
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throw Exception(L"Can't convert table to double");
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};
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virtual std::wstring asString() const {
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throw Exception(L"Can't convert table to string");
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};
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virtual ::Table* asTable() const { return value; };
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virtual Value* clone() const {
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return new TableValue(new ::Table(*value));
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};
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};
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Table::Table(const Table &table)
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{
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*this = table;
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}
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Table::Table(const std::string &fileName)
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{
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lastArrayIndex = 0;
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std::ifstream stream(fileName.c_str(),
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std::ios::binary | std::ios::in);
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if (! stream.good())
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throw Exception(L"Error opening file '" + fromMbcs(fileName) + L"");
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UtfStreamReader reader(&stream);
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Lexal lexal = Lexal(reader);
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parse(lexal, false, 0, 0);
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}
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Table::Table(Lexal &lexal, int line, int pos)
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{
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lastArrayIndex = 0;
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parse(lexal, true, line, pos);
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}
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Table::Table()
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{
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lastArrayIndex = 0;
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}
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Table::~Table()
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{
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for (ValuesMap::iterator i = fields.begin(); i != fields.end(); i++)
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delete (*i).second;
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}
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Table& Table::operator = (const Table &table)
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{
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if (this == &table)
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return *this;
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fields.clear();
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lastArrayIndex = table.lastArrayIndex;
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for (ValuesMap::const_iterator i = table.fields.begin();
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i != table.fields.end(); i++)
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fields[(*i).first] = (*i).second->clone();
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return *this;
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}
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static Value* lexToValue(Lexal &lexal, const Lexeme &lexeme)
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{
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switch (lexeme.getType())
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{
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case Lexeme::Ident:
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case Lexeme::String:
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return new StringValue(lexeme.getContent());
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case Lexeme::Integer:
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return new IntValue(strToInt(lexeme.getContent()));
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case Lexeme::Float:
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return new DoubleValue(strToDouble(lexeme.getContent()));
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case Lexeme::Symbol:
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if (L"{" == lexeme.getContent())
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return new TableValue(new Table(lexal, lexeme.getLine(),
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lexeme.getPos()));
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default:
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throw Exception(L"Invalid lexeme type at " + lexeme.getPosStr());
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}
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}
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void Table::addValuePair(Lexal &lexal, const std::wstring &name)
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{
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Lexeme lex = lexal.getNext();
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if (Lexeme::Eof == lex.getType())
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throw Exception(L"Unexpected end of file");
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fields[name] = lexToValue(lexal, lex);
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}
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void Table::addArrayElement(Lexal &lexal, const Lexeme &lexeme)
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{
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fields[numToStr(lastArrayIndex)] = lexToValue(lexal, lexeme);
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lastArrayIndex++;
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}
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void Table::parse(Lexal &lexal, bool needBracket, int startLine, int startPos)
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{
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Lexeme lex;
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bool read = true;
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while (true) {
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if (read) {
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lex = lexal.getNext();
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read = true;
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}
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Lexeme::Type type = lex.getType();
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if (Lexeme::Eof == type) {
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if (! needBracket)
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return;
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else
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throw Exception(L"Table started at " + Lexal::posToStr(
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startLine, startPos) + L" is never finished");
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} else if ((Lexeme::Symbol == type) && (L"}" == lex.getContent())
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&& needBracket)
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return;
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else if ((Lexeme::Symbol == type) && ((L"," == lex.getContent()) ||
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(L";" == lex.getContent()))) {
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// ignore separator
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} else if (Lexeme::Ident == type) {
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Lexeme nextLex = lexal.getNext();
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if (Lexeme::Symbol == nextLex.getType()) {
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if (L"=" == nextLex.getContent())
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addValuePair(lexal, lex.getContent());
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else {
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addArrayElement(lexal, lex);
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lex = nextLex;
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read = false;
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}
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} else
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throw Exception(L"Unexpected token at " + Lexal::posToStr(
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startLine, startPos));
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} else
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addArrayElement(lexal, lex);
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}
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}
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bool Table::hasKey(const std::wstring &key) const
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{
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return (fields.end() != fields.find(key));
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}
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static std::wstring encodeString(const std::wstring &str)
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{
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std::wstring res;
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int len = str.length();
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res += L"\"";
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for (int i = 0; i < len; i++) {
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wchar_t ch = str[i];
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switch (ch) {
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case '\n': res += L"\\n"; break;
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case '\r': res += L"\\r"; break;
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case '\'': res += L"\\'"; break;
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case '\"': res += L"\\\""; break;
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case '\\': res += L"\\\\"; break;
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default:
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res += ch;
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}
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}
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res += L"\"";
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return res;
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}
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static std::wstring printValue(Value *value, bool butify, int spaces)
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{
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if (! value)
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return L"";
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switch (value->getType()) {
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case Value::Integer:
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return toString(value->asInt());
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case Value::Double:
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{
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std::wstring s = toString(value->asDouble());
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if (s.find(L'.') >= s.length())
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s.append(L".0");
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return s;
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}
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case Value::String:
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return encodeString(value->asString());
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case Value::Table:
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return value->asTable()->toString(true, butify, spaces);
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}
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return L"";
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}
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bool Table::isArray() const
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{
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int size = fields.size();
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for (int i = 0; i < size; i++) {
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if (! hasKey(::toString(i)))
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return false;
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}
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return true;
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}
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std::wstring Table::toString() const
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{
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return toString(false, true, 0);
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}
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static bool isInteger(const std::wstring &str)
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{
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int sz = str.length();
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for (int i = 0; i < sz; i++) {
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wchar_t ch = str[i];
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if ((ch < L'0') || (ch > L'9'))
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return false;
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}
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return true;
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}
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std::wstring Table::toString(bool printBraces, bool butify, int spaces) const
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{
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std::wstring res;
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if (printBraces)
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res += butify ? L"{\n" : L"{";
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bool printNames = ! isArray();
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for (ValuesMap::const_iterator i = fields.begin(); i != fields.end();
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i++)
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{
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const std::wstring &name = (*i).first;
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Value *value = (*i).second;
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if (butify)
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for (int j = 0; j < spaces; j++)
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res += L" ";
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else
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res += L" ";
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if (printNames && (! isInteger(name)))
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res += name + L" = ";
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res += printValue(value, butify, spaces + 4);
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if (printNames)
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res += butify ? L";\n" : L";";
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else
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res += butify ? L",\n" : L",";
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}
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if (printBraces) {
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if (! butify)
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res += L" }";
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else {
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int ident = (spaces >= 4) ? spaces - 4 : 0;
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for (int j = 0; j < ident; j++)
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res += L" ";
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res += L"}";
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}
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}
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return res;
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}
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Value::Type Table::getType(const std::wstring &key) const
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{
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ValuesMap::const_iterator i = fields.find(key);
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if (i == fields.end())
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throw Exception(L"Field '" + key + L"' doesn't exists in the table");
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return (*i).second->getType();
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}
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std::wstring Table::getString(const std::wstring &key,
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const std::wstring &dflt) const
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{
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ValuesMap::const_iterator i = fields.find(key);
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return (i != fields.end()) ? (*i).second->asString() : dflt;
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}
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int Table::getInt(const std::wstring &key, int dflt) const
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{
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ValuesMap::const_iterator i = fields.find(key);
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return (i != fields.end()) ? ((*i).second ? (*i).second->asInt() : dflt) : dflt;
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}
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double Table::getDouble(const std::wstring &key, double dflt) const
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{
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ValuesMap::const_iterator i = fields.find(key);
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return (i != fields.end()) ? (*i).second->asDouble() : dflt;
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}
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Table* Table::getTable(const std::wstring &key, Table *dflt) const
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{
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ValuesMap::const_iterator i = fields.find(key);
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return (i != fields.end()) ? (*i).second->asTable() : dflt;
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}
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void Table::setValue(const std::wstring &key, Value *value)
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{
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ValuesMap::const_iterator i = fields.find(key);
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if (i != fields.end())
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delete (*i).second;
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fields[key] = value;
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}
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void Table::setString(const std::wstring &key, const std::wstring &value)
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{
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setValue(key, new StringValue(value));
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}
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void Table::setInt(const std::wstring &key, int value)
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{
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setValue(key, new IntValue(value));
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}
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void Table::setDouble(const std::wstring &key, double value)
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{
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setValue(key, new DoubleValue(value));
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}
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void Table::setTable(const std::wstring &key, Table *value)
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{
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setValue(key, new TableValue(value));
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}
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void Table::save(const std::wstring &fileName) const
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{
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std::ofstream stream(toMbcs(fileName).c_str(), std::ios::out
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| std::ios::binary);
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if (! stream.good())
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throw Exception(L"Can't open '" + fileName + L"' for writing");
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std::string utfStr(toUtf8(toString()));
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stream.write(utfStr.c_str(), utfStr.length());
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if (! stream.good())
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throw Exception(L"Can't write table to file '" + fileName + L"'");
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stream.close();
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}
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