forked from abseil/abseil-cpp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
atod_manual_test.cc
193 lines (174 loc) · 6.33 KB
/
atod_manual_test.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
// Copyright 2022 The Abseil Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// This program tests the absl::SimpleAtod and absl::SimpleAtof functions. Run
// it as "atod_manual_test pnftd/data/*.txt" where the pnftd directory is a
// local checkout of the https://github.com/nigeltao/parse-number-fxx-test-data
// repository. The test suite lives in a separate repository because its more
// than 5 million test cases weigh over several hundred megabytes and because
// the test cases are also useful to other software projects, not just Abseil.
// Its data/*.txt files contain one test case per line, like:
//
// 3C00 3F800000 3FF0000000000000 1
// 3D00 3FA00000 3FF4000000000000 1.25
// 3D9A 3FB33333 3FF6666666666666 1.4
// 57B7 42F6E979 405EDD2F1A9FBE77 123.456
// 622A 44454000 4088A80000000000 789
// 7C00 7F800000 7FF0000000000000 123.456e789
//
// For each line (and using 0-based column indexes), columns [5..13] and
// [14..30] contain the 32-bit float and 64-bit double result of parsing
// columns [31..].
//
// For example, parsing "1.4" as a float gives the bits 0x3FB33333.
//
// In this 6-line example, the final line's float and double values are all
// infinity. The largest finite float and double values are approximately
// 3.40e+38 and 1.80e+308.
#include <cstdint>
#include <cstdio>
#include <string>
#include "absl/base/casts.h"
#include "absl/strings/numbers.h"
#include "absl/strings/str_format.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
static constexpr uint8_t kUnhex[256] = {
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, // '0' ..= '7'
0x8, 0x9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, // '8' ..= '9'
0x0, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF, 0x0, // 'A' ..= 'F'
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, //
};
static absl::optional<std::string> ReadFileToString(const char* filename) {
FILE* f = fopen(filename, "rb");
if (!f) {
return absl::nullopt;
}
fseek(f, 0, SEEK_END);
size_t size = ftell(f);
fseek(f, 0, SEEK_SET);
std::string s(size, '\x00');
size_t n = fread(&s[0], 1, size, f);
fclose(f);
if (n != size) {
return absl::nullopt;
}
return s;
}
static bool ProcessOneTestFile(const char* filename) {
absl::optional<std::string> contents = ReadFileToString(filename);
if (!contents) {
absl::FPrintF(stderr, "Invalid file: %s\n", filename);
return false;
}
int num_cases = 0;
for (absl::string_view v(*contents); !v.empty();) {
size_t new_line = v.find('\n');
if ((new_line == absl::string_view::npos) || (new_line < 32)) {
break;
}
absl::string_view input = v.substr(31, new_line - 31);
// Test absl::SimpleAtof.
{
float f;
if (!absl::SimpleAtof(input, &f)) {
absl::FPrintF(stderr, "Could not parse \"%s\" in %s\n", input,
filename);
return false;
}
uint32_t have32 = absl::bit_cast<uint32_t>(f);
uint32_t want32 = 0;
for (int i = 0; i < 8; i++) {
want32 = (want32 << 4) | kUnhex[static_cast<unsigned char>(v[5 + i])];
}
if (have32 != want32) {
absl::FPrintF(stderr,
"absl::SimpleAtof failed parsing \"%s\" in %s\n have "
"%08X\n want %08X\n",
input, filename, have32, want32);
return false;
}
}
// Test absl::SimpleAtod.
{
double d;
if (!absl::SimpleAtod(input, &d)) {
absl::FPrintF(stderr, "Could not parse \"%s\" in %s\n", input,
filename);
return false;
}
uint64_t have64 = absl::bit_cast<uint64_t>(d);
uint64_t want64 = 0;
for (int i = 0; i < 16; i++) {
want64 = (want64 << 4) | kUnhex[static_cast<unsigned char>(v[14 + i])];
}
if (have64 != want64) {
absl::FPrintF(stderr,
"absl::SimpleAtod failed parsing \"%s\" in %s\n have "
"%016X\n want %016X\n",
input, filename, have64, want64);
return false;
}
}
num_cases++;
v = v.substr(new_line + 1);
}
printf("%8d OK in %s\n", num_cases, filename);
return true;
}
int main(int argc, char** argv) {
if (argc < 2) {
absl::FPrintF(
stderr,
"Usage: %s pnftd/data/*.txt\nwhere the pnftd directory is a local "
"checkout of "
"the\nhttps://github.com/nigeltao/parse-number-fxx-test-data "
"repository.\n",
argv[0]);
return 1;
}
for (int i = 1; i < argc; i++) {
if (!ProcessOneTestFile(argv[i])) {
return 1;
}
}
return 0;
}