2 * This file is part of the GROMACS molecular simulation package.
4 * Copyright (c) 2015, by the GROMACS development team, led by
5 * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 * and including many others, as listed in the AUTHORS file in the
7 * top-level source directory and at http://www.gromacs.org.
9 * GROMACS is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundation; either version 2.1
12 * of the License, or (at your option) any later version.
14 * GROMACS is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with GROMACS; if not, see
21 * http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 * If you want to redistribute modifications to GROMACS, please
25 * consider that scientific software is very special. Version
26 * control is crucial - bugs must be traceable. We will be happy to
27 * consider code for inclusion in the official distribution, but
28 * derived work must not be called official GROMACS. Details are found
29 * in the README & COPYING files - if they are missing, get the
30 * official version at http://www.gromacs.org.
32 * To help us fund GROMACS development, we humbly ask that you cite
33 * the research papers on the package. Check out http://www.gromacs.org.
35 /*! \libinternal \file
37 * Declares gmx::TextReader.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_utility
43 #ifndef GMX_UTILITY_TEXTREADER_H
44 #define GMX_UTILITY_TEXTREADER_H
48 #include "gromacs/utility/classhelpers.h"
49 #include "gromacs/utility/textstream.h"
54 /*! \libinternal \brief
55 * Reads text from a TextInputStream.
57 * This class provides more formatted reading capabilities than reading raw
58 * lines from the stream (and a natural place to implement more such
61 * All methods that read from the stream can throw any exceptions that the
62 * underlying stream throws.
65 * \ingroup module_utility
71 * Creates a reader that reads from specified file.
73 * \param[in] filename Path to the file to open.
74 * \throws std::bad_alloc if out of memory.
75 * \throws FileIOError on any I/O error.
77 * This constructor is provided for convenience for reading directly
78 * from a file, without the need to construct multiple objects.
80 explicit TextReader(const std::string &filename);
82 * Creates a reader that reads from specified stream.
84 * \param[in] stream Stream to read from.
85 * \throws std::bad_alloc if out of memory.
87 * The caller is responsible of the lifetime of the stream (should
88 * remain in existence as long as the reader exists).
90 * This constructor is provided for convenience for cases where the
91 * stream is not allocated with `new` and/or not managed by a
92 * boost::shared_ptr (e.g., if the stream is an object on the stack).
94 explicit TextReader(TextInputStream *stream);
96 * Creates a reader that reads from specified stream.
98 * \param[in] stream Stream to read from.
99 * \throws std::bad_alloc if out of memory.
101 * The reader keeps a reference to the stream, so the caller can pass
102 * in a temporary if necessary.
104 explicit TextReader(const TextInputStreamPointer &stream);
108 * Reads a single line (including newline) from the stream.
110 * \param[out] line String to receive the line.
111 * \returns `false` if nothing was read because the file ended.
113 * On error or when false is returned, \p line will be empty.
114 * Newlines will be returned as part of \p line if it was present in
116 * To loop over all lines in the stream, use:
119 while (reader.readLine(&line))
125 bool readLine(std::string *line);
127 * Reads a single line from the stream.
129 * \param[out] line String to receive the line.
130 * \returns false if nothing was read because the file ended.
132 * On error or when false is returned, \p line will be empty.
133 * Works as readLine(), except that trailing whitespace will be removed
138 bool readLineTrimmed(std::string *line);
141 * Closes the underlying stream.
148 PrivateImplPointer<Impl> impl_;