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85ec4feb | 1 | // Copyright (C) 2004-2018 Free Software Foundation, Inc. |
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2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
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7 | // any later version. |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
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15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
32890afe | 17 | |
c7c2e831 | 18 | #include <unistd.h> |
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19 | #include <cstdio> |
20 | #include <fstream> | |
21 | #include <string> | |
22 | #include <testsuite_performance.h> | |
23 | ||
24 | // libstdc++/15002 | |
25 | int main() | |
26 | { | |
27 | using namespace std; | |
28 | using namespace __gnu_test; | |
29 | ||
30 | time_counter time; | |
31 | resource_counter resource; | |
32 | ||
33 | const char filename[] = "tmp_getline.txt"; | |
34 | const unsigned lines = 1000000; | |
35 | const unsigned line_length = 200; | |
36 | ||
37 | char* line = new char[line_length + 2]; | |
38 | ||
39 | // Construct data. | |
40 | { | |
41 | memset(line, 'x', line_length); | |
42 | line[line_length] = '\n'; | |
43 | line[line_length + 1] = '\0'; | |
44 | ||
45 | ofstream out(filename); | |
46 | for (unsigned i = 0; i < lines; ++i) | |
47 | out << line; | |
48 | } | |
49 | ||
50 | // C | |
51 | { | |
52 | // Fill the cache. | |
53 | FILE *file = fopen(filename, "r"); | |
54 | while (fgets(line, line_length + 2, file)); | |
55 | fclose(file); | |
56 | ||
57 | file = fopen(filename, "r"); | |
58 | start_counters(time, resource); | |
59 | while (fgets(line, line_length + 2, file)); | |
60 | stop_counters(time, resource); | |
61 | fclose(file); | |
62 | report_performance(__FILE__, "C (fgets)", time, resource); | |
63 | clear_counters(time, resource); | |
64 | } | |
65 | ||
66 | // getline(basic_istream<_CharT, _Traits>& __in, | |
67 | // basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim) | |
68 | { | |
69 | ifstream file(filename); | |
70 | string string_line; | |
71 | ||
72 | start_counters(time, resource); | |
73 | while (getline(file, string_line)); | |
74 | stop_counters(time, resource); | |
75 | report_performance(__FILE__, "C++ (string)", time, resource); | |
76 | clear_counters(time, resource); | |
77 | } | |
78 | ||
79 | // getline(char_type* __s, streamsize __n, char_type __delim) | |
80 | { | |
81 | ifstream file(filename); | |
82 | ||
83 | start_counters(time, resource); | |
84 | while (file.getline(line, line_length + 2)); | |
85 | stop_counters(time, resource); | |
86 | report_performance(__FILE__, "C++ (char array)", time, resource); | |
87 | clear_counters(time, resource); | |
88 | } | |
89 | ||
90 | delete[] line; | |
91 | unlink(filename); | |
92 | return 0; | |
93 | } |