1// spreadsort string sorting example.
2//
3// Copyright Steven Ross 2009-2014.
4//
5// Distributed under the Boost Software License, Version 1.0.
6// (See accompanying file LICENSE_1_0.txt or copy at
7// http://www.boost.org/LICENSE_1_0.txt)
8
9// See http://www.boost.org/libs/sort for library home page.
10
11#include <boost/sort/spreadsort/string_sort.hpp>
12#include <time.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <algorithm>
16#include <vector>
17#include <iostream>
18#include <fstream>
19#include <string>
20using std::string;
21using namespace boost::sort::spreadsort;
22
23#define DATA_TYPE string
24
25//Pass in an argument to test std::sort
26int main(int argc, const char ** argv) {
27 std::ifstream indata;
28 std::ofstream outfile;
29 bool stdSort = false;
30 unsigned loopCount = 1;
31 for (int u = 1; u < argc; ++u) {
32 if (std::string(argv[u]) == "-std")
33 stdSort = true;
34 else
35 loopCount = atoi(nptr: argv[u]);
36 }
37 double total = 0.0;
38 //Run multiple loops, if requested
39 std::vector<DATA_TYPE> array;
40 for (unsigned u = 0; u < loopCount; ++u) {
41 indata.open(s: "input.txt", mode: std::ios_base::in | std::ios_base::binary);
42 if (indata.bad()) {
43 printf(format: "input.txt could not be opened\n");
44 return 1;
45 }
46 DATA_TYPE inval;
47 while (!indata.eof() ) {
48 indata >> inval;
49 array.push_back(x: inval);
50 }
51
52 indata.close();
53 clock_t start, end;
54 double elapsed;
55 start = clock();
56 if (stdSort)
57 //std::sort(&(array[0]), &(array[0]) + uCount);
58 std::sort(first: array.begin(), last: array.end());
59 else
60 //string_sort(&(array[0]), &(array[0]) + uCount);
61 string_sort(first: array.begin(), last: array.end());
62 end = clock();
63 elapsed = static_cast<double>(end - start);
64 if (stdSort)
65 outfile.open(s: "standard_sort_out.txt", mode: std::ios_base::out |
66 std::ios_base::binary | std::ios_base::trunc);
67 else
68 outfile.open(s: "boost_sort_out.txt", mode: std::ios_base::out |
69 std::ios_base::binary | std::ios_base::trunc);
70 if (outfile.good()) {
71 for (unsigned u = 0; u < array.size(); ++u)
72 outfile << array[u] << "\n";
73 outfile.close();
74 }
75 total += elapsed;
76 array.clear();
77 }
78 if (stdSort)
79 printf(format: "std::sort elapsed time %f\n", total / CLOCKS_PER_SEC);
80 else
81 printf(format: "spreadsort elapsed time %f\n", total / CLOCKS_PER_SEC);
82 return 0;
83}
84
85
86

source code of boost/libs/sort/example/stringsample.cpp