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208 lines
6.8 KiB
C++
208 lines
6.8 KiB
C++
#pragma once
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#include "config.h"
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#if USE_BASE64
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# include <Columns/ColumnFixedString.h>
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# include <Columns/ColumnString.h>
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# include <DataTypes/DataTypeString.h>
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# include <Functions/FunctionHelpers.h>
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# include <Functions/IFunction.h>
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# include <Interpreters/Context_fwd.h>
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# include <libbase64.h>
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# include <Common/MemorySanitizer.h>
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# include <cstddef>
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# include <span>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_COLUMN;
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extern const int INCORRECT_DATA;
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}
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struct Base64Encode
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{
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static constexpr auto name = "base64Encode";
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static size_t getBufferSize(size_t string_length, size_t string_count)
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{
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return ((string_length - string_count) / 3 + string_count) * 4 + string_count;
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}
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static size_t perform(const std::span<const UInt8> src, UInt8 * dst)
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{
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size_t outlen = 0;
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base64_encode(reinterpret_cast<const char *>(src.data()), src.size(), reinterpret_cast<char *>(dst), &outlen, 0);
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return outlen;
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}
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};
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struct Base64Decode
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{
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static constexpr auto name = "base64Decode";
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static size_t getBufferSize(size_t string_length, size_t string_count)
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{
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return ((string_length - string_count) / 4 + string_count) * 3 + string_count;
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}
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static size_t perform(const std::span<const UInt8> src, UInt8 * dst)
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{
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size_t outlen = 0;
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int rc = base64_decode(reinterpret_cast<const char *>(src.data()), src.size(), reinterpret_cast<char *>(dst), &outlen, 0);
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if (rc != 1)
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throw Exception(
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ErrorCodes::INCORRECT_DATA,
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"Failed to {} input '{}'",
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name,
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String(reinterpret_cast<const char *>(src.data()), src.size()));
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return outlen;
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}
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};
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struct TryBase64Decode
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{
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static constexpr auto name = "tryBase64Decode";
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static size_t getBufferSize(size_t string_length, size_t string_count)
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{
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return Base64Decode::getBufferSize(string_length, string_count);
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}
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static size_t perform(const std::span<const UInt8> src, UInt8 * dst)
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{
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size_t outlen = 0;
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int rc = base64_decode(reinterpret_cast<const char *>(src.data()), src.size(), reinterpret_cast<char *>(dst), &outlen, 0);
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if (rc != 1)
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outlen = 0;
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return outlen;
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}
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};
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template <typename Func>
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class FunctionBase64Conversion : public IFunction
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{
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public:
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static constexpr auto name = Func::name;
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionBase64Conversion>(); }
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String getName() const override { return Func::name; }
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size_t getNumberOfArguments() const override { return 1; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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bool useDefaultImplementationForConstants() const override { return true; }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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FunctionArgumentDescriptors mandatory_arguments{
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{"value", static_cast<FunctionArgumentDescriptor::TypeValidator>(&isStringOrFixedString), nullptr, "String or FixedString"}
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};
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validateFunctionArgumentTypes(*this, arguments, mandatory_arguments);
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return std::make_shared<DataTypeString>();
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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const auto & input_column = arguments[0].column;
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if (const auto * src_column_as_fixed_string = checkAndGetColumn<ColumnFixedString>(*input_column))
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return execute(*src_column_as_fixed_string, input_rows_count);
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else if (const auto * src_column_as_string = checkAndGetColumn<ColumnString>(*input_column))
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return execute(*src_column_as_string, input_rows_count);
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throw Exception(
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ErrorCodes::ILLEGAL_COLUMN,
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"Illegal column {} of first argument of function {}, must be of type FixedString or String.",
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input_column->getName(),
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getName());
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}
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private:
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static ColumnPtr execute(const ColumnString & src_column, size_t src_row_count)
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{
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auto dst_column = ColumnString::create();
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auto & dst_chars = dst_column->getChars();
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auto & dst_offsets = dst_column->getOffsets();
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const auto reserve = Func::getBufferSize(src_column.byteSize(), src_column.size());
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dst_chars.resize(reserve);
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dst_offsets.resize(src_row_count);
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const auto & src_chars = src_column.getChars();
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const auto & src_offsets = src_column.getOffsets();
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auto * dst = dst_chars.data();
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auto * dst_pos = dst;
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const auto * src = src_chars.data();
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size_t src_offset_prev = 0;
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for (size_t row = 0; row < src_row_count; ++row)
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{
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const size_t src_length = src_offsets[row] - src_offset_prev - 1;
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const size_t outlen = Func::perform({src, src_length}, dst_pos);
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/// Base64 library is using AVX-512 with some shuffle operations.
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/// Memory sanitizer don't understand if there was uninitialized memory in SIMD register but it was not used in the result of shuffle.
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__msan_unpoison(dst_pos, outlen);
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src += src_length + 1;
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dst_pos += outlen;
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*dst_pos = '\0';
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dst_pos += 1;
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dst_offsets[row] = dst_pos - dst;
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src_offset_prev = src_offsets[row];
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}
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dst_chars.resize(dst_pos - dst);
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return dst_column;
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}
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static ColumnPtr execute(const ColumnFixedString & src_column, size_t src_row_count)
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{
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auto dst_column = ColumnString::create();
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auto & dst_chars = dst_column->getChars();
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auto & dst_offsets = dst_column->getOffsets();
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const auto reserve = Func::getBufferSize(src_column.byteSize(), src_column.size());
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dst_chars.resize(reserve);
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dst_offsets.resize(src_row_count);
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const auto & src_chars = src_column.getChars();
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const auto & src_n = src_column.getN();
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auto * dst = dst_chars.data();
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auto * dst_pos = dst;
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const auto * src = src_chars.data();
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for (size_t row = 0; row < src_row_count; ++row)
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{
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const auto outlen = Func::perform({src, src_n}, dst_pos);
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/// Base64 library is using AVX-512 with some shuffle operations.
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/// Memory sanitizer don't understand if there was uninitialized memory in SIMD register but it was not used in the result of shuffle.
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__msan_unpoison(dst_pos, outlen);
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src += src_n;
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dst_pos += outlen;
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*dst_pos = '\0';
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dst_pos += 1;
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dst_offsets[row] = dst_pos - dst;
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}
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dst_chars.resize(dst_pos - dst);
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return dst_column;
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}
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};
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}
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#endif
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