1 //===- llvm/unittest/Support/NativeFormatTests.cpp - formatting tests -----===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/ADT/SmallString.h" 11 #include "llvm/Support/NativeFormatting.h" 12 #include "llvm/Support/raw_ostream.h" 13 #include "gtest/gtest.h" 14 15 #include <type_traits> 16 17 using namespace llvm; 18 19 namespace { 20 21 template <typename T> std::string format_number(T N, IntegerStyle Style) { 22 std::string S; 23 llvm::raw_string_ostream Str(S); 24 write_integer(Str, N, 0, Style); 25 Str.flush(); 26 return S; 27 } 28 29 std::string format_number(uint64_t N, HexPrintStyle Style, 30 Optional<size_t> Width = None) { 31 std::string S; 32 llvm::raw_string_ostream Str(S); 33 write_hex(Str, N, Style, Width); 34 Str.flush(); 35 return S; 36 } 37 38 std::string format_number(double D, FloatStyle Style, 39 Optional<size_t> Precision = None) { 40 std::string S; 41 llvm::raw_string_ostream Str(S); 42 write_double(Str, D, Style, Precision); 43 Str.flush(); 44 return S; 45 } 46 47 // Test basic number formatting with various styles and default width and 48 // precision. 49 TEST(NativeFormatTest, BasicIntegerTests) { 50 // Simple integers with no decimal. 51 EXPECT_EQ("0", format_number(0, IntegerStyle::Integer)); 52 EXPECT_EQ("2425", format_number(2425, IntegerStyle::Integer)); 53 EXPECT_EQ("-2425", format_number(-2425, IntegerStyle::Integer)); 54 55 EXPECT_EQ("0", format_number(0LL, IntegerStyle::Integer)); 56 EXPECT_EQ("257257257235709", 57 format_number(257257257235709LL, IntegerStyle::Integer)); 58 EXPECT_EQ("-257257257235709", 59 format_number(-257257257235709LL, IntegerStyle::Integer)); 60 61 // Number formatting. 62 EXPECT_EQ("0", format_number(0, IntegerStyle::Number)); 63 EXPECT_EQ("2,425", format_number(2425, IntegerStyle::Number)); 64 EXPECT_EQ("-2,425", format_number(-2425, IntegerStyle::Number)); 65 EXPECT_EQ("257,257,257,235,709", 66 format_number(257257257235709LL, IntegerStyle::Number)); 67 EXPECT_EQ("-257,257,257,235,709", 68 format_number(-257257257235709LL, IntegerStyle::Number)); 69 70 // Hex formatting. 71 // lower case, prefix. 72 EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixLower)); 73 EXPECT_EQ("0xbeef", format_number(0xbeefLL, HexPrintStyle::PrefixLower)); 74 EXPECT_EQ("0xdeadbeef", 75 format_number(0xdeadbeefLL, HexPrintStyle::PrefixLower)); 76 77 // upper-case, prefix. 78 EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixUpper)); 79 EXPECT_EQ("0xBEEF", format_number(0xbeefLL, HexPrintStyle::PrefixUpper)); 80 EXPECT_EQ("0xDEADBEEF", 81 format_number(0xdeadbeefLL, HexPrintStyle::PrefixUpper)); 82 83 // lower-case, no prefix 84 EXPECT_EQ("0", format_number(0, HexPrintStyle::Lower)); 85 EXPECT_EQ("beef", format_number(0xbeefLL, HexPrintStyle::Lower)); 86 EXPECT_EQ("deadbeef", format_number(0xdeadbeefLL, HexPrintStyle::Lower)); 87 88 // upper-case, no prefix. 89 EXPECT_EQ("0", format_number(0, HexPrintStyle::Upper)); 90 EXPECT_EQ("BEEF", format_number(0xbeef, HexPrintStyle::Upper)); 91 EXPECT_EQ("DEADBEEF", format_number(0xdeadbeef, HexPrintStyle::Upper)); 92 } 93 94 // Test basic floating point formatting with various styles and default width 95 // and precision. 96 TEST(NativeFormatTest, BasicFloatingPointTests) { 97 // Double 98 EXPECT_EQ("0.000000e+00", format_number(0.0, FloatStyle::Exponent)); 99 EXPECT_EQ("-0.000000e+00", format_number(-0.0, FloatStyle::Exponent)); 100 EXPECT_EQ("1.100000e+00", format_number(1.1, FloatStyle::Exponent)); 101 EXPECT_EQ("1.100000E+00", format_number(1.1, FloatStyle::ExponentUpper)); 102 103 // Default precision is 2 for floating points. 104 EXPECT_EQ("1.10", format_number(1.1, FloatStyle::Fixed)); 105 EXPECT_EQ("1.34", format_number(1.34, FloatStyle::Fixed)); 106 EXPECT_EQ("1.34", format_number(1.344, FloatStyle::Fixed)); 107 EXPECT_EQ("1.35", format_number(1.346, FloatStyle::Fixed)); 108 } 109 110 // Test common boundary cases and min/max conditions. 111 TEST(NativeFormatTest, BoundaryTests) { 112 // Min and max. 113 EXPECT_EQ("18446744073709551615", 114 format_number(UINT64_MAX, IntegerStyle::Integer)); 115 116 EXPECT_EQ("9223372036854775807", 117 format_number(INT64_MAX, IntegerStyle::Integer)); 118 EXPECT_EQ("-9223372036854775808", 119 format_number(INT64_MIN, IntegerStyle::Integer)); 120 121 EXPECT_EQ("4294967295", format_number(UINT32_MAX, IntegerStyle::Integer)); 122 EXPECT_EQ("2147483647", format_number(INT32_MAX, IntegerStyle::Integer)); 123 EXPECT_EQ("-2147483648", format_number(INT32_MIN, IntegerStyle::Integer)); 124 125 EXPECT_EQ("nan", format_number(std::numeric_limits<double>::quiet_NaN(), 126 FloatStyle::Fixed)); 127 EXPECT_EQ("INF", format_number(std::numeric_limits<double>::infinity(), 128 FloatStyle::Fixed)); 129 } 130 131 TEST(NativeFormatTest, HexTests) { 132 // Test hex formatting with different widths and precisions. 133 134 // Width less than the value should print the full value anyway. 135 EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixLower, 0)); 136 EXPECT_EQ("0xabcde", format_number(0xABCDE, HexPrintStyle::PrefixLower, 3)); 137 138 // Precision greater than the value should pad with 0s. 139 // TODO: The prefix should not be counted in the precision. But unfortunately 140 // it is and we have to live with it unless we fix all existing users of 141 // prefixed hex formatting. 142 EXPECT_EQ("0x000", format_number(0, HexPrintStyle::PrefixLower, 5)); 143 EXPECT_EQ("0x0abcde", format_number(0xABCDE, HexPrintStyle::PrefixLower, 8)); 144 145 EXPECT_EQ("00000", format_number(0, HexPrintStyle::Lower, 5)); 146 EXPECT_EQ("000abcde", format_number(0xABCDE, HexPrintStyle::Lower, 8)); 147 148 // Try printing more digits than can fit in a uint64. 149 EXPECT_EQ("0x00000000000000abcde", 150 format_number(0xABCDE, HexPrintStyle::PrefixLower, 21)); 151 } 152 153 TEST(NativeFormatTest, IntegerTests) { 154 EXPECT_EQ("-10", format_number(-10, IntegerStyle::Integer)); 155 EXPECT_EQ("-100", format_number(-100, IntegerStyle::Integer)); 156 EXPECT_EQ("-1000", format_number(-1000, IntegerStyle::Integer)); 157 EXPECT_EQ("-1234567890", format_number(-1234567890, IntegerStyle::Integer)); 158 EXPECT_EQ("10", format_number(10, IntegerStyle::Integer)); 159 EXPECT_EQ("100", format_number(100, IntegerStyle::Integer)); 160 EXPECT_EQ("1000", format_number(1000, IntegerStyle::Integer)); 161 EXPECT_EQ("1234567890", format_number(1234567890, IntegerStyle::Integer)); 162 } 163 164 TEST(NativeFormatTest, CommaTests) { 165 EXPECT_EQ("0", format_number(0, IntegerStyle::Number)); 166 EXPECT_EQ("10", format_number(10, IntegerStyle::Number)); 167 EXPECT_EQ("100", format_number(100, IntegerStyle::Number)); 168 EXPECT_EQ("1,000", format_number(1000, IntegerStyle::Number)); 169 EXPECT_EQ("1,234,567,890", format_number(1234567890, IntegerStyle::Number)); 170 171 EXPECT_EQ("-10", format_number(-10, IntegerStyle::Number)); 172 EXPECT_EQ("-100", format_number(-100, IntegerStyle::Number)); 173 EXPECT_EQ("-1,000", format_number(-1000, IntegerStyle::Number)); 174 EXPECT_EQ("-1,234,567,890", format_number(-1234567890, IntegerStyle::Number)); 175 } 176 } 177