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// Copyright 2018 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <limits>
#include "core/fxcrt/fx_number.h"
#include "testing/gtest/include/gtest/gtest.h"
TEST(fxnumber, Default) {
FX_Number number;
EXPECT_TRUE(number.IsInteger());
EXPECT_FALSE(number.IsSigned());
EXPECT_EQ(0, number.GetSigned());
EXPECT_FLOAT_EQ(0.0f, number.GetFloat());
}
TEST(fxnumber, FromSigned) {
FX_Number number(-128);
EXPECT_TRUE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(-128, number.GetSigned());
EXPECT_FLOAT_EQ(-128.0f, number.GetFloat());
// Show that assignment works.
FX_Number number2 = number;
EXPECT_TRUE(number2.IsInteger());
EXPECT_TRUE(number2.IsSigned());
EXPECT_EQ(-128, number2.GetSigned());
EXPECT_FLOAT_EQ(-128.0f, number2.GetFloat());
}
TEST(fxnumber, FromFloat) {
FX_Number number(-100.001f);
EXPECT_FALSE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(-100, number.GetSigned());
EXPECT_FLOAT_EQ(-100.001f, number.GetFloat());
// Show that assignment works.
FX_Number number2 = number;
EXPECT_FALSE(number2.IsInteger());
EXPECT_TRUE(number2.IsSigned());
EXPECT_EQ(-100, number2.GetSigned());
EXPECT_FLOAT_EQ(-100.001f, number2.GetFloat());
// Show positive saturation.
FX_Number number3(1e17f);
EXPECT_FALSE(number3.IsInteger());
EXPECT_TRUE(number3.IsSigned());
EXPECT_EQ(std::numeric_limits<int32_t>::max(), number3.GetSigned());
// Show negative saturation.
FX_Number number4(-1e17f);
EXPECT_FALSE(number4.IsInteger());
EXPECT_TRUE(number4.IsSigned());
EXPECT_EQ(std::numeric_limits<int32_t>::min(), number4.GetSigned());
}
TEST(fxnumber, FromStringUnsigned) {
struct TestCase {
const char* input;
int expected_output;
};
auto test_func = [](pdfium::span<const TestCase> test_cases) {
for (const auto& test : test_cases) {
FX_Number number(test.input);
EXPECT_TRUE(number.IsInteger());
EXPECT_FALSE(number.IsSigned());
EXPECT_EQ(test.expected_output, number.GetSigned());
}
};
static constexpr TestCase kNormalCases[] = {
{"", 0},
{"0", 0},
{"10", 10},
};
test_func(kNormalCases);
static constexpr TestCase kOverflowCases[] = {
{"4223423494965252", 0},
{"4294967296", 0},
{"4294967297", 0},
{"5000000000", 0},
};
test_func(kOverflowCases);
// No explicit sign will allow the number to go negative if retrieved as a
// signed value. This is needed for things like the encryption permissions
// flag (Table 3.20 PDF 1.7 spec)
static constexpr TestCase kNegativeCases[] = {
{"4294965252", -2044},
{"4294967247", -49},
{"4294967248", -48},
{"4294967292", -4},
{"4294967295", -1},
};
test_func(kNegativeCases);
}
TEST(fxnumber, FromStringSigned) {
{
FX_Number number("-0");
EXPECT_TRUE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(0, number.GetSigned());
}
{
FX_Number number("+0");
EXPECT_TRUE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(0, number.GetSigned());
}
{
FX_Number number("-10");
EXPECT_TRUE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(-10, number.GetSigned());
}
{
FX_Number number("+10");
EXPECT_TRUE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(10, number.GetSigned());
}
{
FX_Number number("-2147483648");
EXPECT_TRUE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(std::numeric_limits<int32_t>::min(), number.GetSigned());
}
{
FX_Number number("+2147483647");
EXPECT_TRUE(number.IsInteger());
EXPECT_TRUE(number.IsSigned());
EXPECT_EQ(std::numeric_limits<int32_t>::max(), number.GetSigned());
}
{
// Value underflows.
FX_Number number("-2147483649");
EXPECT_EQ(0, number.GetSigned());
}
{
// Value overflows.
FX_Number number("+2147483648");
EXPECT_EQ(0, number.GetSigned());
}
}
TEST(fxnumber, FromStringFloat) {
FX_Number number("3.24");
EXPECT_FLOAT_EQ(3.24f, number.GetFloat());
}
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