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8d9254fc | 1 | // Copyright (C) 2004-2020 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/>. | |
17 | ||
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18 | |
19 | #include <cstdio> | |
debac9f4 | 20 | #include <cstdlib> |
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21 | #include <fstream> |
22 | #include <testsuite_performance.h> | |
23 | ||
24 | // libstdc++/11722 | |
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 int iterations = 500000; | |
34 | const int chunksize = 100; | |
35 | ||
36 | char* chunk = new char[chunksize]; | |
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37 | const char* name1 = "/usr/share/dict/words"; |
38 | const char* name2 = "/usr/share/dict/linux.words"; | |
39 | const char* name = name1; | |
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40 | |
41 | // C | |
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42 | FILE* file; |
43 | if (!(file = fopen(name, "r"))) | |
44 | { | |
45 | name = name2; | |
46 | if (!(file = fopen(name, "r"))) | |
47 | exit(1); | |
48 | } | |
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49 | setvbuf(file, 0, _IONBF, 0); |
50 | start_counters(time, resource); | |
51 | for (int i = 0; i < iterations; ++i) | |
52 | if (fread(chunk, 1, chunksize, file) < chunksize) | |
53 | fseek(file, 0, SEEK_SET); | |
54 | stop_counters(time, resource); | |
55 | fclose(file); | |
56 | report_performance(__FILE__, "C", time, resource); | |
57 | clear_counters(time, resource); | |
58 | ||
59 | // C unlocked | |
60 | file = fopen(name, "r"); | |
61 | setvbuf(file, 0, _IONBF, 0); | |
62 | start_counters(time, resource); | |
63 | for (int i = 0; i < iterations; ++i) | |
64 | if (fread_unlocked(chunk, 1, chunksize, file) < chunksize) | |
65 | fseek(file, 0, SEEK_SET); | |
66 | stop_counters(time, resource); | |
67 | fclose(file); | |
68 | report_performance(__FILE__, "C unlocked", time, resource); | |
69 | clear_counters(time, resource); | |
70 | ||
71 | // C++ | |
72 | filebuf buf; | |
73 | buf.pubsetbuf(0, 0); | |
74 | buf.open(name, ios_base::in); | |
75 | start_counters(time, resource); | |
76 | for (int i = 0; i < iterations; ++i) | |
77 | if (buf.sgetn(chunk, chunksize) < chunksize) | |
78 | buf.pubseekoff(0, ios::beg); | |
79 | stop_counters(time, resource); | |
80 | report_performance(__FILE__, "C++", time, resource); | |
81 | ||
82 | delete [] chunk; | |
83 | ||
84 | return 0; | |
85 | } |