/*------------------------------------------------------------------------- * drawElements Quality Program Tester Core * ---------------------------------------- * * Copyright 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * *//*! * \file * \brief Utility class to build seeds from different data types. * * Values are first XORed with type specifig mask, which makes sure that * two values with different types, but same bit presentation produce * different results. Then values are passed through 32 bit crc. *//*--------------------------------------------------------------------*/ #include "tcuSeedBuilder.hpp" #include "deMemory.h" namespace tcu { namespace { deUint32 advanceCrc32 (deUint32 oldCrc, size_t len, const deUint8* data) { const deUint32 generator = 0x04C11DB7u; deUint32 crc = oldCrc; for (size_t i = 0; i < len; i++) { const deUint32 current = static_cast<deUint32>(data[i]); crc = crc ^ current; for (size_t bitNdx = 0; bitNdx < 8; bitNdx++) { if (crc & 1u) crc = (crc >> 1u) ^ generator; else crc = (crc >> 1u); } } return crc; } } // anonymous SeedBuilder::SeedBuilder (void) : m_hash (0xccf139d7u) { } void SeedBuilder::feed (size_t size, const void* ptr) { m_hash = advanceCrc32(m_hash, size, (const deUint8*)ptr); } SeedBuilder& operator<< (SeedBuilder& builder, bool value) { const deUint8 val = (value ? 54: 7); builder.feed(sizeof(val), &val); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deInt8 value) { const deInt8 val = value ^ 75; builder.feed(sizeof(val), &val); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deUint8 value) { const deInt8 val = value ^ 140u; builder.feed(sizeof(val), &val); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deInt16 value) { const deInt16 val = value ^ 555; const deUint8 data[] = { (deUint8)(((deUint16)val) & 0xFFu), (deUint8)(((deUint16)val) >> 8), }; builder.feed(sizeof(data), data); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deUint16 value) { const deUint16 val = value ^ 37323u; const deUint8 data[] = { (deUint8)(val & 0xFFu), (deUint8)(val >> 8), }; builder.feed(sizeof(data), data); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deInt32 value) { const deInt32 val = value ^ 53054741; const deUint8 data[] = { (deUint8)(((deUint32)val) & 0xFFu), (deUint8)((((deUint32)val) >> 8) & 0xFFu), (deUint8)((((deUint32)val) >> 16) & 0xFFu), (deUint8)((((deUint32)val) >> 24) & 0xFFu), }; builder.feed(sizeof(data), data); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deUint32 value) { const deUint32 val = value ^ 1977303630u; const deUint8 data[] = { (deUint8)(val & 0xFFu), (deUint8)((val >> 8) & 0xFFu), (deUint8)((val >> 16) & 0xFFu), (deUint8)((val >> 24) & 0xFFu), }; builder.feed(sizeof(data), data); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deInt64 value) { const deInt64 val = value ^ 772935234179004386ll; const deUint8 data[] = { (deUint8)(((deUint64)val) & 0xFFu), (deUint8)((((deUint64)val) >> 8) & 0xFFu), (deUint8)((((deUint64)val) >> 16) & 0xFFu), (deUint8)((((deUint64)val) >> 24) & 0xFFu), (deUint8)((((deUint64)val) >> 32) & 0xFFu), (deUint8)((((deUint64)val) >> 40) & 0xFFu), (deUint8)((((deUint64)val) >> 48) & 0xFFu), (deUint8)((((deUint64)val) >> 56) & 0xFFu), }; builder.feed(sizeof(data), data); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, deUint64 value) { const deUint64 val = value ^ 4664937258000467599ull; const deUint8 data[] = { (deUint8)(val & 0xFFu), (deUint8)((val >> 8) & 0xFFu), (deUint8)((val >> 16) & 0xFFu), (deUint8)((val >> 24) & 0xFFu), (deUint8)((val >> 32) & 0xFFu), (deUint8)((val >> 40) & 0xFFu), (deUint8)((val >> 48) & 0xFFu), (deUint8)((val >> 56) & 0xFFu), }; builder.feed(sizeof(data), data); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, float value) { // \note Assume that float has same endianess as uint32. deUint32 val; deMemcpy(&val, &value, sizeof(deUint32)); { const deUint8 data[] = { (deUint8)(val & 0xFFu), (deUint8)((val >> 8) & 0xFFu), (deUint8)((val >> 16) & 0xFFu), (deUint8)((val >> 24) & 0xFFu), }; builder.feed(sizeof(data), data); return builder; } } SeedBuilder& operator<< (SeedBuilder& builder, double value) { // \note Assume that double has same endianess as uint64. deUint64 val; deMemcpy(&val, &value, sizeof(deUint64)); const deUint8 data[] = { (deUint8)(val & 0xFFu), (deUint8)((val >> 8) & 0xFFu), (deUint8)((val >> 16) & 0xFFu), (deUint8)((val >> 24) & 0xFFu), (deUint8)((val >> 32) & 0xFFu), (deUint8)((val >> 40) & 0xFFu), (deUint8)((val >> 48) & 0xFFu), (deUint8)((val >> 56) & 0xFFu), }; builder.feed(sizeof(data), data); return builder; } SeedBuilder& operator<< (SeedBuilder& builder, const std::string& value) { builder.feed(value.length(), value.c_str()); return builder; } } // tcu