Author: sebor
Date: Thu Oct 13 10:15:23 2005
New Revision: 320811
URL: http://svn.apache.org/viewcvs?rev=320811&view=rev
Log:
2005-10-13 Martin Sebor <[EMAIL PROTECTED]>
* money_manip.cpp: New example program demonstrating the implementation
of user-defined manipulators (using the std::__rw_smanip template) for
the convenient extraction and insertion of monetary values.
Added:
incubator/stdcxx/trunk/examples/manual/money_manip.cpp (with props)
Added: incubator/stdcxx/trunk/examples/manual/money_manip.cpp
URL:
http://svn.apache.org/viewcvs/incubator/stdcxx/trunk/examples/manual/money_manip.cpp?rev=320811&view=auto
==============================================================================
--- incubator/stdcxx/trunk/examples/manual/money_manip.cpp (added)
+++ incubator/stdcxx/trunk/examples/manual/money_manip.cpp Thu Oct 13 10:15:23
2005
@@ -0,0 +1,181 @@
+/**************************************************************************
+ *
+ * money_manip.cpp - Example program demonstrating the implementation
+ * of user-defined manipulators for the convenient
+ * extraction and insertion of monetary values
+ *
+ * $Id$
+ *
+ ***************************************************************************
+ *
+ * Copyright (c) 1994-2005 Quovadx, Inc., acting through its Rogue Wave
+ * Software division. 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
+ * http://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.
+ *
+ **************************************************************************/
+
+#include <iomanip> // for __rw_smanip
+#include <iostream> // for cout
+#include <locale> // for money_get, money_put
+
+#include <examples.h>
+
+
+// implementation class of the extraction manipulator for monetary values
+template <class moneyT>
+struct money_get_manip
+{
+ moneyT *pval_;
+
+ explicit money_get_manip (moneyT *pval)
+ : pval_ (pval) { }
+
+ template <class charT, class Traits>
+ void
+ operator() (std::basic_ios<charT, Traits> &strm, bool intl) const {
+ typedef std::istreambuf_iterator<charT> Iter;
+ typedef std::money_get<charT, Iter> MoneyGet;
+
+ std::ios_base::iostate err = std::ios_base::goodbit;
+ const MoneyGet &mg = std::use_facet<MoneyGet>(strm.getloc ());
+
+ // extract the monetary value from the stream
+ mg.get (Iter (strm.rdbuf ()), Iter (), intl, strm, err, *pval_);
+
+ if (std::ios_base::goodbit != err)
+ strm.setstate (err);
+ }
+};
+
+
+// implementation class of the insertion manipulator for monetary values
+template <class moneyT>
+struct money_put_manip
+{
+ const moneyT &val_;
+
+ explicit money_put_manip (const moneyT &val)
+ : val_ (val) { }
+
+ template <class charT, class Traits>
+ void
+ operator() (std::basic_ios<charT, Traits> &strm, bool intl) const {
+ typedef std::ostreambuf_iterator<charT> Iter;
+ typedef std::money_put<charT, Iter> MoneyPut;
+
+ const MoneyPut &tp = std::use_facet<MoneyPut>(strm.getloc ());
+
+ // insert the monetary value into the stream
+ const Iter end =
+ tp.put (Iter (strm.rdbuf ()), intl, strm, strm.fill (), val_);
+
+ if (end.failed ())
+ strm.setstate (std::ios_base::badbit);
+ }
+};
+
+
+// manipulator for the extraction of monetary long double values
+inline std::__rw_smanip<money_get_manip<long double>, bool>
+get_money (long double *pval, bool intl = false)
+{
+ // return an object of the manipulator implementation type
+ // that will store the function arguments until its function
+ // call operator is invoked by the extraction operator for
+ // std::__rw_smanip
+ typedef money_get_manip<long double> GetMoney;
+ typedef std::__rw_smanip<GetMoney, bool> Manip;
+
+ return Manip (GetMoney (pval), intl);
+}
+
+
+// manipulator for the extraction of monetary strings
+template <class charT>
+inline std::__rw_smanip<money_get_manip<std::basic_string<charT> >, bool>
+get_money (std::basic_string<charT> *pval, bool intl = false)
+{
+ // return an object of the manipulator implementation type
+ // that will store the function arguments until its function
+ // call operator is invoked by the extraction operator for
+ // std::__rw_smanip
+ typedef std::basic_string<charT> String;
+ typedef money_get_manip<String> GetMoney;
+ typedef std::__rw_smanip<GetMoney, bool> Manip;
+
+ return Manip (GetMoney (pval), intl);
+}
+
+
+// manipulator for the insertion of monetary long double values
+inline std::__rw_smanip<money_put_manip<long double>, bool>
+put_money (long double val, bool intl = false)
+{
+ // return an object of the manipulator implementation type
+ // that will store the function arguments until its function
+ // call operator is invoked by the insertion operator for
+ // std::__rw_smanip
+ typedef money_put_manip<long double> PutMoney;
+ typedef std::__rw_smanip<PutMoney, bool> Manip;
+
+ return Manip (PutMoney (val), intl);
+}
+
+
+// manipulator for the insertion of monetary strings
+template <class charT>
+inline std::__rw_smanip<money_put_manip<std::basic_string<charT> >, bool>
+put_money (const std::basic_string<charT> &val, bool intl = false)
+{
+ // return an object of the manipulator implementation type
+ // that will store the function arguments until its function
+ // call operator is invoked by the insertion operator for
+ // std::__rw_smanip
+ typedef std::basic_string<charT> String;
+ typedef money_put_manip<String> PutMoney;
+ typedef std::__rw_smanip<PutMoney, bool> Manip;
+
+ return Manip (PutMoney (val), intl);
+}
+
+
+int main (int argc, char *argv[])
+{
+ const std::string valstr = argc < 2 ? "0" : argv [1];
+
+ // set cin and cout's locale to the one specified in the environment
+ std::cin.imbue (std::locale (""));
+ std::cout.imbue (std::cin.getloc ());
+
+ // output the monetary value specified by the command line argument,
+ // inlcuing the currency symbol, in both the local and international
+ // formats
+ std::cout.setf (std::cout.showbase);
+ std::cout << put_money (valstr) << '\n';
+ std::cout << put_money (valstr, true) << '\n';
+
+ long double val = 0.0L;
+
+ // input a long double monetary value
+ std::cin >> get_money (&val);
+
+ // if the input was successful, output the extracted monetary value
+ // otherwise, output an error message
+ if (std::cin.good ()) {
+ std::cout << put_money (val) << '\n';
+ std::cout << put_money (val, true) << '\n';
+ }
+ else {
+ std::cerr << "get_money (long double*) failed\n";
+ return 1;
+ }
+
+ return 0;
+}
Propchange: incubator/stdcxx/trunk/examples/manual/money_manip.cpp
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Propchange: incubator/stdcxx/trunk/examples/manual/money_manip.cpp
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