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
ReferenceGetBits32(const uint8_t * pData,int bitpos,int nbits)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
TEST(fxge,GetBits32)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
TEST(fxcrt,FX_atonum)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