diff options
Diffstat (limited to 'contrib/chained/examples/example2.cpp')
-rw-r--r-- | contrib/chained/examples/example2.cpp | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/contrib/chained/examples/example2.cpp b/contrib/chained/examples/example2.cpp new file mode 100644 index 0000000..6ff227d --- /dev/null +++ b/contrib/chained/examples/example2.cpp @@ -0,0 +1,71 @@ +/* ---------------------------------------------------------------------------- + libconfig - A library for processing structured configuration files + libconfig chained - Extension for reading the configuration and defining + the configuration specification at once. + Copyright (C) 2016 Richard Schubert + + This file is part of libconfig contributions. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License + as published by the Free Software Foundation; either version 2.1 of + the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, see + <http://www.gnu.org/licenses/>. + ---------------------------------------------------------------------------- +*/ + +#include <iostream> +#include <iomanip> +#include <cstdlib> +#include "../libconfig_chained.h" + +using namespace std; +using namespace libconfig; + +// This example reads complex types from config file using method chains. + +void example2(Config& cfg) +{ + ChainedSetting cs(cfg.getRoot()); + + auto books = cs["inventory"]["books"]; + if (!books.exists()) + { + cerr << "No book section available." << endl; + return; + } + + cout << setw(30) << left << "TITLE" << " " + << setw(30) << left << "AUTHOR" << " " + << setw(6) << left << "PRICE" << " " + << "QTY" + << endl; + + const int count = books.getLength(); + for(int i = 0; i < count; ++i) + { + auto book = books[i]; + + string title = book["title"]; + string author = book["author"]; + double price = book["price"].min(0.0); + int qty = book["qty"].min(0); + + // Only output the record if all of the expected fields are present. + if(book.isAnySettingMissing()) continue; + + cout << setw(30) << left << title << " " + << setw(30) << left << author << " " + << '$' << setw(6) << right << price << " " + << qty + << endl; + } +} |