--- a/src/IntegerDataType.h Sat Jul 14 23:24:22 2018 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,131 +0,0 @@
-#pragma once
-
-#include <string>
-#include <iostream>
-#include <cassert>
-#include <limits>
-
-#include "common.h"
-#include "DataType.h"
-#include "RelpipeException.h"
-
-using namespace std;
-
-namespace rp_prototype {
-
-/**
- * The prototype does not have various integer and other numeric data types,
- * it just works with one type of integer.
- * But this integer has variable length -- smaller values occupy only one byte, bigger ones, more bytes 1,2,4,8 + first byte (contains length signalization).
- * In the real implementation of relational pipes, there will be DataTypes for particular numeric types.
- *
- * TODO: support also big endian architectures.
- * TODO: throw exception if a value was stored in bigger type than needed (while reading – there should be only one supported way how to encode a single value)
- *
- * Example of encoded values:
- * -------------------------------------------------------------------------------------------------
- * $ for n in 0 1 10 250 251 252 65535 65536 4294967295 4294967296 18446744073709551615; do printf '%20s = ' $n; dist/Debug/GNU-Linux/rp-prototype write integer $n | hd | head -n 1; done
- * 0 = 00000000 00 |.|
- * 1 = 00000000 01 |.|
- * 10 = 00000000 0a |.|
- * 250 = 00000000 fa |.|
- * 251 = 00000000 fb fb |..|
- * 252 = 00000000 fb fc |..|
- * 65535 = 00000000 fc ff ff |...|
- * 65536 = 00000000 fd 00 00 01 00 |.....|
- * 4294967295 = 00000000 fd ff ff ff ff |.....|
- * 4294967296 = 00000000 fe 00 00 00 00 01 00 00 00 |.........|
- * 18446744073709551615 = 00000000 fe ff ff ff ff ff ff ff ff |.........|
- * -------------------------------------------------------------------------------------------------
- *
- * Example of decoded values:
- * -------------------------------------------------------------------------------------------------
- * $ for n in 0 1 10 250 251 252 65535 65536 4294967295 4294967296 18446744073709551615; do dist/Debug/GNU-Linux/rp-prototype write integer $n | dist/Debug/GNU-Linux/rp-prototype read integer; done;
- * 0
- * 1
- * 10
- * 250
- * 251
- * 252
- * 65535
- * 65536
- * 4294967295
- * 4294967296
- * 18446744073709551615
- * -------------------------------------------------------------------------------------------------
- *
- * Note: similar format as original idea: https://en.wikipedia.org/wiki/X.690#Length_octets
- *
- */
-class IntegerDataType : public DataType<integer_t> {
-private:
- static const uint8_t INTEGER_TYPE_UINT8 = 251;
- static const uint8_t INTEGER_TYPE_UINT16 = 252;
- static const uint8_t INTEGER_TYPE_UINT32 = 253;
- static const uint8_t INTEGER_TYPE_UINT64 = 254;
- static const uint8_t INTEGER_TYPE_RESERVED = 255;
-
- template<typename T> integer_t read(istream &input) {
- T value = 0;
- input.read(reinterpret_cast<char *> (&value), sizeof (value));
- return value;
- }
-
- template<typename T> void write(ostream &output, const integer_t &value) {
- assert(sizeof (T) <= sizeof (value));
- output.write(reinterpret_cast<const char *> (&value), sizeof (T));
- }
-
- template<typename T> void write(ostream &output, const uint8_t type, const integer_t &value) {
- write<uint8_t>(output, type);
- write<T>(output, value);
- }
-
- template<typename T> bool fits(const integer_t &value) {
- return value <= numeric_limits<T>::max();
- }
-
-public:
-
- IntegerDataType() : DataType<integer_t>(DATA_TYPE_ID_INTEGER, DATA_TYPE_CODE_INTEGER) {
- }
-
- integer_t readValue(istream &input) override {
- uint8_t first;
- input.read(reinterpret_cast<char *> (&first), sizeof (first));
- if (input.good()) {
-
- if (first < INTEGER_TYPE_UINT8) return first;
- else if (first == INTEGER_TYPE_UINT8) return read<uint8_t>(input);
- else if (first == INTEGER_TYPE_UINT16) return read<uint16_t>(input);
- else if (first == INTEGER_TYPE_UINT32) return read<uint32_t>(input);
- else if (first == INTEGER_TYPE_UINT64) return read<uint64_t>(input);
- else throw RelpipeException(L"Error while parsing integer type: unsupported type", EXIT_CODE_DATA_ERROR);
- } else {
- throw RelpipeException(L"Error while reading integer from the stream.", EXIT_CODE_DATA_ERROR);
- }
- }
-
- void writeValue(ostream &output, const integer_t &value) override {
- // output << value; // by zapsalo číslo jako ASII text
-
- if (value < INTEGER_TYPE_UINT8) write<uint8_t>(output, value);
- else if (fits<uint8_t>(value)) write<uint8_t>(output, INTEGER_TYPE_UINT8, value);
- else if (fits<uint16_t>(value)) write<uint16_t>(output, INTEGER_TYPE_UINT16, value);
- else if (fits<uint32_t>(value)) write<uint32_t>(output, INTEGER_TYPE_UINT32, value);
- else if (fits<uint64_t>(value)) write<uint64_t>(output, INTEGER_TYPE_UINT64, value);
- else throw RelpipeException(L"Error while writing integer type: value too long", EXIT_CODE_DATA_ERROR);
- }
-
- integer_t toValue(const wstring &stringValue) override {
- // throws „terminate called after throwing an instance of 'std::invalid_argument'“ SIGABRT, core dumped on invalid number
- return stoul(stringValue);
- }
-
- wstring toString(const integer_t &value) override {
- return to_wstring(value);
- }
-
-};
-
-}
\ No newline at end of file