1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <limits> 6 7 #include "core/fxcrt/fx_basic.h" 8 #include "testing/fx_string_testhelpers.h" 9 #include "testing/gtest/include/gtest/gtest.h" 10 11 namespace { 12 13 uint32_t ReferenceGetBits32(const uint8_t* pData, int bitpos, int nbits) { 14 int result = 0; 15 for (int i = 0; i < nbits; i++) { 16 if (pData[(bitpos + i) / 8] & (1 << (7 - (bitpos + i) % 8))) 17 result |= 1 << (nbits - i - 1); 18 } 19 return result; 20 } 21 22 } // namespace 23 24 TEST(fxge, GetBits32) { 25 unsigned char data[] = {0xDE, 0x3F, 0xB1, 0x7C, 0x12, 0x9A, 0x04, 0x56}; 26 for (int nbits = 1; nbits <= 32; ++nbits) { 27 for (int bitpos = 0; bitpos < (int)sizeof(data) * 8 - nbits; ++bitpos) { 28 EXPECT_EQ(ReferenceGetBits32(data, bitpos, nbits), 29 GetBits32(data, bitpos, nbits)); 30 } 31 } 32 } 33 34 TEST(fxcrt, FX_atonum) { 35 int i; 36 EXPECT_TRUE(FX_atonum("10", &i)); 37 EXPECT_EQ(10, i); 38 39 EXPECT_TRUE(FX_atonum("-10", &i)); 40 EXPECT_EQ(-10, i); 41 42 EXPECT_TRUE(FX_atonum("+10", &i)); 43 EXPECT_EQ(10, i); 44 45 EXPECT_TRUE(FX_atonum("-2147483648", &i)); 46 EXPECT_EQ(std::numeric_limits<int>::min(), i); 47 48 EXPECT_TRUE(FX_atonum("2147483647", &i)); 49 EXPECT_EQ(2147483647, i); 50 51 // Value overflows. 52 EXPECT_TRUE(FX_atonum("-2147483649", &i)); 53 EXPECT_EQ(0, i); 54 55 // Value overflows. 56 EXPECT_TRUE(FX_atonum("+2147483648", &i)); 57 EXPECT_EQ(0, i); 58 59 // Value overflows. 60 EXPECT_TRUE(FX_atonum("4223423494965252", &i)); 61 EXPECT_EQ(0, i); 62 63 // No explicit sign will allow the number to go negative. This is for things 64 // like the encryption Permissions flag (Table 3.20 PDF 1.7 spec) 65 EXPECT_TRUE(FX_atonum("4294965252", &i)); 66 EXPECT_EQ(-2044, i); 67 68 EXPECT_TRUE(FX_atonum("-4294965252", &i)); 69 EXPECT_EQ(0, i); 70 71 EXPECT_TRUE(FX_atonum("+4294965252", &i)); 72 EXPECT_EQ(0, i); 73 74 float f; 75 EXPECT_FALSE(FX_atonum("3.24", &f)); 76 EXPECT_FLOAT_EQ(3.24f, f); 77 } 78
