libstdc++-v3/testsuite/performance/22_locale/wchar_t_in.cc

   1 // Copyright (C) 2003 Free Software Foundation, Inc.
   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
   6 // Free Software Foundation; either version 2, or (at your option)
   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
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // As a special exception, you may use this file as part of a free software
  20 // library without restriction.  Specifically, if other files instantiate
  21 // templates or use macros or inline functions from this file, or you compile
  22 // this file and link it with other files to produce an executable, this
  23 // file does not by itself cause the resulting executable to be covered by
  24 // the GNU General Public License.  This exception does not however
  25 // invalidate any other reasons why the executable file might be covered by
  26 // the GNU General Public License.
  27
  28 #include <cstdio>
  29 #include <cstring>
  30 #include <fstream>
  31 #include <langinfo.h>
  32 #include <iconv.h>
  33 #include <testsuite_performance.h>
  34
  35 // libstdc++/11602 (do_in)
  36 int main(int argc, char** argv)
  37 {
  38   using namespace std;
  39   using namespace __gnu_test;
  40
  41   time_counter time;
  42   resource_counter resource;
  43   const int iters = 400000;
  44
  45   wchar_t wbuf[1024];
  46   char cbuf[1024];
  47
  48   memset(cbuf, 'a', 1024);
  49
  50   // C (iconv)
  51   iconv_t cd = iconv_open("WCHAR_T", nl_langinfo(CODESET));
  52   start_counters(time, resource);
  53   for (int i = 0; i < iters; ++i)
  54     {
  55       size_t inbytesleft = 1024;
  56       size_t outbytesleft = 1024 * sizeof(wchar_t);
  57       char* in = cbuf;
  58       char* out = reinterpret_cast<char*>(wbuf);
  59       iconv(cd, &in, &inbytesleft, &out, &outbytesleft);
  60     }
  61   stop_counters(time, resource);
  62   iconv_close(cd);
  63   report_performance(__FILE__, "C (iconv)", time, resource);
  64   clear_counters(time, resource);
  65
  66   // C++ (codecvt)
  67   locale loc;
  68   const codecvt<wchar_t, char, mbstate_t>& cvt =
  69     use_facet<codecvt<wchar_t, char, mbstate_t> >(loc);
  70   mbstate_t state;
  71   memset(&state, 0, sizeof(state));
  72   start_counters(time, resource);
  73   for (int i = 0; i < iters; ++i)
  74     {
  75       const char* from_next;
  76       wchar_t* to_next;
  77       cvt.in(state, cbuf, cbuf + 1024, from_next,
  78              wbuf, wbuf + 1024, to_next);
  79     }
  80   stop_counters(time, resource);
  81   report_performance(__FILE__, "C++ (codecvt)", time, resource);
  82
  83   return 0;
  84 }