forked from OSchip/llvm-project
120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
//===- llvm/unittest/Support/DataExtractorTest.cpp - DataExtractor tests --===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/DataExtractor.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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const char numberData[] = "\x80\x90\xFF\xFF\x80\x00\x00\x00";
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const char stringData[] = "hellohello\0hello";
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const char leb128data[] = "\xA6\x49";
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const char bigleb128data[] = "\xAA\xA9\xFF\xAA\xFF\xAA\xFF\x4A";
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TEST(DataExtractorTest, OffsetOverflow) {
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DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
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EXPECT_FALSE(DE.isValidOffsetForDataOfSize(-2U, 5));
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}
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TEST(DataExtractorTest, UnsignedNumbers) {
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DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
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uint32_t offset = 0;
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EXPECT_EQ(0x80U, DE.getU8(&offset));
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EXPECT_EQ(1U, offset);
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offset = 0;
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EXPECT_EQ(0x8090U, DE.getU16(&offset));
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EXPECT_EQ(2U, offset);
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offset = 0;
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EXPECT_EQ(0x8090FFFFU, DE.getU32(&offset));
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EXPECT_EQ(4U, offset);
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offset = 0;
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EXPECT_EQ(0x8090FFFF80000000ULL, DE.getU64(&offset));
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EXPECT_EQ(8U, offset);
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offset = 0;
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EXPECT_EQ(0x8090FFFF80000000ULL, DE.getAddress(&offset));
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EXPECT_EQ(8U, offset);
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offset = 0;
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uint32_t data[2];
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EXPECT_EQ(data, DE.getU32(&offset, data, 2));
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EXPECT_EQ(0x8090FFFFU, data[0]);
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EXPECT_EQ(0x80000000U, data[1]);
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EXPECT_EQ(8U, offset);
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offset = 0;
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// Now for little endian.
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DE = DataExtractor(StringRef(numberData, sizeof(numberData)-1), true, 4);
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EXPECT_EQ(0x9080U, DE.getU16(&offset));
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EXPECT_EQ(2U, offset);
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offset = 0;
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EXPECT_EQ(0xFFFF9080U, DE.getU32(&offset));
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EXPECT_EQ(4U, offset);
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offset = 0;
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EXPECT_EQ(0x80FFFF9080ULL, DE.getU64(&offset));
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EXPECT_EQ(8U, offset);
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offset = 0;
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EXPECT_EQ(0xFFFF9080U, DE.getAddress(&offset));
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EXPECT_EQ(4U, offset);
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offset = 0;
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EXPECT_EQ(data, DE.getU32(&offset, data, 2));
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EXPECT_EQ(0xFFFF9080U, data[0]);
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EXPECT_EQ(0x80U, data[1]);
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EXPECT_EQ(8U, offset);
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}
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TEST(DataExtractorTest, SignedNumbers) {
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DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
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uint32_t offset = 0;
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EXPECT_EQ(-128, DE.getSigned(&offset, 1));
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EXPECT_EQ(1U, offset);
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offset = 0;
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EXPECT_EQ(-32624, DE.getSigned(&offset, 2));
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EXPECT_EQ(2U, offset);
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offset = 0;
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EXPECT_EQ(-2137980929, DE.getSigned(&offset, 4));
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EXPECT_EQ(4U, offset);
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offset = 0;
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EXPECT_EQ(-9182558167379214336LL, DE.getSigned(&offset, 8));
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EXPECT_EQ(8U, offset);
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}
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TEST(DataExtractorTest, Strings) {
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DataExtractor DE(StringRef(stringData, sizeof(stringData)-1), false, 8);
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uint32_t offset = 0;
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EXPECT_EQ(stringData, DE.getCStr(&offset));
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EXPECT_EQ(11U, offset);
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EXPECT_EQ(nullptr, DE.getCStr(&offset));
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EXPECT_EQ(11U, offset);
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}
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TEST(DataExtractorTest, LEB128) {
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DataExtractor DE(StringRef(leb128data, sizeof(leb128data)-1), false, 8);
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uint32_t offset = 0;
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EXPECT_EQ(9382ULL, DE.getULEB128(&offset));
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EXPECT_EQ(2U, offset);
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offset = 0;
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EXPECT_EQ(-7002LL, DE.getSLEB128(&offset));
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EXPECT_EQ(2U, offset);
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DataExtractor BDE(StringRef(bigleb128data, sizeof(bigleb128data)-1), false,8);
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offset = 0;
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EXPECT_EQ(42218325750568106ULL, BDE.getULEB128(&offset));
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EXPECT_EQ(8U, offset);
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offset = 0;
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EXPECT_EQ(-29839268287359830LL, BDE.getSLEB128(&offset));
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EXPECT_EQ(8U, offset);
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}
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}
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