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1 //===- llvm/unittest/Support/NativeFormatTests.cpp - formatting tests -----===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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120
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "llvm/ADT/SmallString.h"
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10 #include "llvm/Support/NativeFormatting.h"
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11 #include "llvm/Support/raw_ostream.h"
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12 #include "gtest/gtest.h"
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13
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14 #include <type_traits>
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15
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16 using namespace llvm;
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17
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18 namespace {
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19
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20 template <typename T> std::string format_number(T N, IntegerStyle Style) {
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21 std::string S;
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22 llvm::raw_string_ostream Str(S);
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23 write_integer(Str, N, 0, Style);
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24 Str.flush();
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25 return S;
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26 }
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27
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28 std::string format_number(uint64_t N, HexPrintStyle Style,
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29 Optional<size_t> Width = None) {
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30 std::string S;
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31 llvm::raw_string_ostream Str(S);
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32 write_hex(Str, N, Style, Width);
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33 Str.flush();
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34 return S;
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35 }
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36
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37 std::string format_number(double D, FloatStyle Style,
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38 Optional<size_t> Precision = None) {
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39 std::string S;
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40 llvm::raw_string_ostream Str(S);
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41 write_double(Str, D, Style, Precision);
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42 Str.flush();
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43 return S;
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44 }
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45
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46 // Test basic number formatting with various styles and default width and
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47 // precision.
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48 TEST(NativeFormatTest, BasicIntegerTests) {
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49 // Simple integers with no decimal.
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50 EXPECT_EQ("0", format_number(0, IntegerStyle::Integer));
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51 EXPECT_EQ("2425", format_number(2425, IntegerStyle::Integer));
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52 EXPECT_EQ("-2425", format_number(-2425, IntegerStyle::Integer));
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53
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54 EXPECT_EQ("0", format_number(0LL, IntegerStyle::Integer));
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55 EXPECT_EQ("257257257235709",
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56 format_number(257257257235709LL, IntegerStyle::Integer));
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57 EXPECT_EQ("-257257257235709",
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58 format_number(-257257257235709LL, IntegerStyle::Integer));
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59
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60 // Number formatting.
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61 EXPECT_EQ("0", format_number(0, IntegerStyle::Number));
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62 EXPECT_EQ("2,425", format_number(2425, IntegerStyle::Number));
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63 EXPECT_EQ("-2,425", format_number(-2425, IntegerStyle::Number));
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64 EXPECT_EQ("257,257,257,235,709",
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65 format_number(257257257235709LL, IntegerStyle::Number));
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66 EXPECT_EQ("-257,257,257,235,709",
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67 format_number(-257257257235709LL, IntegerStyle::Number));
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68
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69 // Hex formatting.
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70 // lower case, prefix.
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71 EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixLower));
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72 EXPECT_EQ("0xbeef", format_number(0xbeefLL, HexPrintStyle::PrefixLower));
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73 EXPECT_EQ("0xdeadbeef",
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74 format_number(0xdeadbeefLL, HexPrintStyle::PrefixLower));
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75
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76 // upper-case, prefix.
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77 EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixUpper));
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78 EXPECT_EQ("0xBEEF", format_number(0xbeefLL, HexPrintStyle::PrefixUpper));
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79 EXPECT_EQ("0xDEADBEEF",
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80 format_number(0xdeadbeefLL, HexPrintStyle::PrefixUpper));
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81
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82 // lower-case, no prefix
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83 EXPECT_EQ("0", format_number(0, HexPrintStyle::Lower));
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84 EXPECT_EQ("beef", format_number(0xbeefLL, HexPrintStyle::Lower));
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85 EXPECT_EQ("deadbeef", format_number(0xdeadbeefLL, HexPrintStyle::Lower));
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86
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87 // upper-case, no prefix.
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88 EXPECT_EQ("0", format_number(0, HexPrintStyle::Upper));
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89 EXPECT_EQ("BEEF", format_number(0xbeef, HexPrintStyle::Upper));
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90 EXPECT_EQ("DEADBEEF", format_number(0xdeadbeef, HexPrintStyle::Upper));
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91 }
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92
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93 // Test basic floating point formatting with various styles and default width
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94 // and precision.
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95 TEST(NativeFormatTest, BasicFloatingPointTests) {
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96 // Double
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97 EXPECT_EQ("0.000000e+00", format_number(0.0, FloatStyle::Exponent));
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98 EXPECT_EQ("-0.000000e+00", format_number(-0.0, FloatStyle::Exponent));
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99 EXPECT_EQ("1.100000e+00", format_number(1.1, FloatStyle::Exponent));
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100 EXPECT_EQ("1.100000E+00", format_number(1.1, FloatStyle::ExponentUpper));
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101
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102 // Default precision is 2 for floating points.
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103 EXPECT_EQ("1.10", format_number(1.1, FloatStyle::Fixed));
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104 EXPECT_EQ("1.34", format_number(1.34, FloatStyle::Fixed));
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105 EXPECT_EQ("1.34", format_number(1.344, FloatStyle::Fixed));
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106 EXPECT_EQ("1.35", format_number(1.346, FloatStyle::Fixed));
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107 }
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108
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109 // Test common boundary cases and min/max conditions.
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110 TEST(NativeFormatTest, BoundaryTests) {
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111 // Min and max.
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112 EXPECT_EQ("18446744073709551615",
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113 format_number(UINT64_MAX, IntegerStyle::Integer));
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114
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115 EXPECT_EQ("9223372036854775807",
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116 format_number(INT64_MAX, IntegerStyle::Integer));
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117 EXPECT_EQ("-9223372036854775808",
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118 format_number(INT64_MIN, IntegerStyle::Integer));
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119
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120 EXPECT_EQ("4294967295", format_number(UINT32_MAX, IntegerStyle::Integer));
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121 EXPECT_EQ("2147483647", format_number(INT32_MAX, IntegerStyle::Integer));
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122 EXPECT_EQ("-2147483648", format_number(INT32_MIN, IntegerStyle::Integer));
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123
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124 EXPECT_EQ("nan", format_number(std::numeric_limits<double>::quiet_NaN(),
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125 FloatStyle::Fixed));
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126 EXPECT_EQ("INF", format_number(std::numeric_limits<double>::infinity(),
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127 FloatStyle::Fixed));
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128 }
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129
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130 TEST(NativeFormatTest, HexTests) {
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131 // Test hex formatting with different widths and precisions.
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132
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133 // Width less than the value should print the full value anyway.
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134 EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixLower, 0));
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135 EXPECT_EQ("0xabcde", format_number(0xABCDE, HexPrintStyle::PrefixLower, 3));
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136
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137 // Precision greater than the value should pad with 0s.
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138 // TODO: The prefix should not be counted in the precision. But unfortunately
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139 // it is and we have to live with it unless we fix all existing users of
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140 // prefixed hex formatting.
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141 EXPECT_EQ("0x000", format_number(0, HexPrintStyle::PrefixLower, 5));
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142 EXPECT_EQ("0x0abcde", format_number(0xABCDE, HexPrintStyle::PrefixLower, 8));
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143
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144 EXPECT_EQ("00000", format_number(0, HexPrintStyle::Lower, 5));
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145 EXPECT_EQ("000abcde", format_number(0xABCDE, HexPrintStyle::Lower, 8));
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146
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147 // Try printing more digits than can fit in a uint64.
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148 EXPECT_EQ("0x00000000000000abcde",
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149 format_number(0xABCDE, HexPrintStyle::PrefixLower, 21));
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150 }
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151
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152 TEST(NativeFormatTest, IntegerTests) {
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153 EXPECT_EQ("-10", format_number(-10, IntegerStyle::Integer));
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154 EXPECT_EQ("-100", format_number(-100, IntegerStyle::Integer));
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155 EXPECT_EQ("-1000", format_number(-1000, IntegerStyle::Integer));
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156 EXPECT_EQ("-1234567890", format_number(-1234567890, IntegerStyle::Integer));
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157 EXPECT_EQ("10", format_number(10, IntegerStyle::Integer));
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158 EXPECT_EQ("100", format_number(100, IntegerStyle::Integer));
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159 EXPECT_EQ("1000", format_number(1000, IntegerStyle::Integer));
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160 EXPECT_EQ("1234567890", format_number(1234567890, IntegerStyle::Integer));
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161 }
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162
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163 TEST(NativeFormatTest, CommaTests) {
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164 EXPECT_EQ("0", format_number(0, IntegerStyle::Number));
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165 EXPECT_EQ("10", format_number(10, IntegerStyle::Number));
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166 EXPECT_EQ("100", format_number(100, IntegerStyle::Number));
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167 EXPECT_EQ("1,000", format_number(1000, IntegerStyle::Number));
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168 EXPECT_EQ("1,234,567,890", format_number(1234567890, IntegerStyle::Number));
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169
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170 EXPECT_EQ("-10", format_number(-10, IntegerStyle::Number));
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171 EXPECT_EQ("-100", format_number(-100, IntegerStyle::Number));
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172 EXPECT_EQ("-1,000", format_number(-1000, IntegerStyle::Number));
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173 EXPECT_EQ("-1,234,567,890", format_number(-1234567890, IntegerStyle::Number));
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174 }
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175 }
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