246 lines
6.7 KiB
C++
246 lines
6.7 KiB
C++
/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* EPICS pvData is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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/* Author: Michael Davidsaver */
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#include <algorithm>
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#include <sstream>
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#include "typeCast.h"
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using epics::pvData::castUnsafe;
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using epics::pvData::String;
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using epics::pvData::ScalarType;
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using epics::pvData::pvString;
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namespace {
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static void noconvert(size_t, void*, const void*)
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{
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throw std::runtime_error("castUnsafeV: Conversion not supported");
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}
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template<typename TO, typename FROM>
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static void castVTyped(size_t count, void *draw, const void *sraw)
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{
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TO *dest=(TO*)draw;
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const FROM *src=(FROM*)sraw;
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//std::transform(src, src+count, dest, castUnsafe<TO,FROM>);
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const FROM *last = src+count;
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try {
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while (src != last) {
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*dest = castUnsafe<TO,FROM>(*src);
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++dest; ++src;
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}
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} catch (std::exception& ex) {
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std::ostringstream os;
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os << "failed to parse element at index " << (src - (FROM*)sraw);
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os << ": " << ex.what();
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throw std::runtime_error(os.str());
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}
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}
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template<typename T>
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static void copyV(size_t count, void *draw, const void *sraw)
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{
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T *dest=(T*)draw;
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const T *src=(T*)sraw;
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std::copy(src, src+count, dest);
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}
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typedef void (*convertfn)(size_t, void*, const void*);
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/* lookup table of converter functions.
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* first dimension is TO, second is FROM
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*/
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static convertfn converters[pvString+1][pvString+1] =
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{
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// to pvBoolean
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{ ©V<epics::pvData::boolean>,
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&noconvert,
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&noconvert,
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&noconvert,
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&noconvert,
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&noconvert,
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&noconvert,
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&noconvert,
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&noconvert,
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&noconvert,
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&noconvert,
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&castVTyped<epics::pvData::boolean, String>,
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},
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// to pvByte
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{&noconvert,
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©V<int8_t>,
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&castVTyped<int8_t, int16_t>,
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&castVTyped<int8_t, int32_t>,
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&castVTyped<int8_t, int64_t>,
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&castVTyped<int8_t, uint8_t>,
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&castVTyped<int8_t, uint16_t>,
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&castVTyped<int8_t, uint32_t>,
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&castVTyped<int8_t, uint64_t>,
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&castVTyped<int8_t, float>,
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&castVTyped<int8_t, double>,
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&castVTyped<int8_t, String>,
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},
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// to pvShort
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{&noconvert,
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&castVTyped<int16_t, int8_t>,
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©V<int16_t>,
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&castVTyped<int16_t, int32_t>,
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&castVTyped<int16_t, int64_t>,
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&castVTyped<int16_t, uint8_t>,
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&castVTyped<int16_t, uint16_t>,
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&castVTyped<int16_t, uint32_t>,
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&castVTyped<int16_t, uint64_t>,
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&castVTyped<int16_t, float>,
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&castVTyped<int16_t, double>,
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&castVTyped<int16_t, String>,
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},
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// to pvInt
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{&noconvert,
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&castVTyped<int32_t, int8_t>,
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&castVTyped<int32_t, int16_t>,
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©V<int32_t>,
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&castVTyped<int32_t, int64_t>,
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&castVTyped<int32_t, uint8_t>,
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&castVTyped<int32_t, uint16_t>,
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&castVTyped<int32_t, uint32_t>,
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&castVTyped<int32_t, uint64_t>,
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&castVTyped<int32_t, float>,
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&castVTyped<int32_t, double>,
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&castVTyped<int32_t, String>,
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},
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// to pvLong
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{&noconvert,
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&castVTyped<int64_t, int8_t>,
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&castVTyped<int64_t, int16_t>,
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&castVTyped<int64_t, int32_t>,
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©V<int64_t>,
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&castVTyped<int64_t, uint8_t>,
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&castVTyped<int64_t, uint16_t>,
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&castVTyped<int64_t, uint32_t>,
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&castVTyped<int64_t, uint64_t>,
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&castVTyped<int64_t, float>,
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&castVTyped<int64_t, double>,
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&castVTyped<int64_t, String>,
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},
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// to pvUByte
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{&noconvert,
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&castVTyped<uint8_t, int8_t>,
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&castVTyped<uint8_t, int16_t>,
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&castVTyped<uint8_t, int32_t>,
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&castVTyped<uint8_t, uint64_t>,
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©V<uint8_t>,
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&castVTyped<uint8_t, uint16_t>,
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&castVTyped<uint8_t, uint32_t>,
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&castVTyped<uint8_t, uint64_t>,
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&castVTyped<uint8_t, float>,
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&castVTyped<uint8_t, double>,
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&castVTyped<uint8_t, String>,
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},
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// to pvUShort
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{&noconvert,
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&castVTyped<uint16_t, int8_t>,
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&castVTyped<uint16_t, int16_t>,
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&castVTyped<uint16_t, int32_t>,
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&castVTyped<uint16_t, uint64_t>,
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&castVTyped<uint16_t, uint8_t>,
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©V<uint16_t>,
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&castVTyped<uint16_t, uint32_t>,
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&castVTyped<uint16_t, uint64_t>,
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&castVTyped<uint16_t, float>,
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&castVTyped<uint16_t, double>,
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&castVTyped<uint16_t, String>,
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},
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// to pvUInt
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{&noconvert,
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&castVTyped<uint32_t, int8_t>,
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&castVTyped<uint32_t, int16_t>,
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&castVTyped<uint32_t, int32_t>,
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&castVTyped<uint32_t, uint64_t>,
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&castVTyped<uint32_t, uint8_t>,
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&castVTyped<uint32_t, uint16_t>,
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©V<uint32_t>,
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&castVTyped<uint32_t, uint64_t>,
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&castVTyped<uint32_t, float>,
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&castVTyped<uint32_t, double>,
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&castVTyped<uint32_t, String>,
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},
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// to pvULong
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{&noconvert,
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&castVTyped<uint64_t, int8_t>,
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&castVTyped<uint64_t, int16_t>,
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&castVTyped<uint64_t, int32_t>,
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&castVTyped<uint64_t, uint64_t>,
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&castVTyped<uint64_t, uint8_t>,
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&castVTyped<uint64_t, uint16_t>,
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&castVTyped<uint64_t, uint32_t>,
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©V<uint64_t>,
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&castVTyped<uint64_t, float>,
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&castVTyped<uint64_t, double>,
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&castVTyped<uint64_t, String>,
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},
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// to pvFloat
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{&noconvert,
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&castVTyped<float, int8_t>,
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&castVTyped<float, int16_t>,
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&castVTyped<float, int32_t>,
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&castVTyped<float, uint64_t>,
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&castVTyped<float, uint8_t>,
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&castVTyped<float, uint16_t>,
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&castVTyped<float, uint32_t>,
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&castVTyped<float, uint64_t>,
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©V<float>,
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&castVTyped<float, double>,
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&castVTyped<float, String>,
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},
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// to pvDouble
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{&noconvert,
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&castVTyped<double, int8_t>,
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&castVTyped<double, int16_t>,
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&castVTyped<double, int32_t>,
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&castVTyped<double, uint64_t>,
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&castVTyped<double, uint8_t>,
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&castVTyped<double, uint16_t>,
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&castVTyped<double, uint32_t>,
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&castVTyped<double, uint64_t>,
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&castVTyped<double, float>,
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©V<double>,
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&castVTyped<double, String>,
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},
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// to pvString
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{&castVTyped<String, epics::pvData::boolean>,
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&castVTyped<String, int8_t>,
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&castVTyped<String, int16_t>,
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&castVTyped<String, int32_t>,
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&castVTyped<String, uint64_t>,
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&castVTyped<String, uint8_t>,
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&castVTyped<String, uint16_t>,
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&castVTyped<String, uint32_t>,
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&castVTyped<String, uint64_t>,
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&castVTyped<String, float>,
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&castVTyped<String, double>,
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©V<String>,
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},
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};
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} // end namespace
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namespace epics { namespace pvData {
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void castUnsafeV(size_t count, ScalarType to, void *dest, ScalarType from, const void *src)
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{
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unsigned int ito=to, ifrom=from;
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if(ito>pvString || ifrom>pvString)
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throw std::runtime_error("castUnsafeV: Invalid types");
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converters[ito][ifrom](count, dest, src);
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}
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}}
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