ios_base.h revision 8974d36b49996aa59a926a53b830332890021e4c 
1/* -*- c++ -*- */
2/*
3 * Copyright (C) 2010 The Android Open Source Project
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *  * Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 *  * Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in
13 *    the documentation and/or other materials provided with the
14 *    distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
23 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef ANDROID_ASTL_IOS_BASE__
31#define ANDROID_ASTL_IOS_BASE__
32
33#include <ios_pos_types.h>
34
35namespace std {
36
37/**
38 * Root of the streams inheritance.
39 * The STL defines ios_base as a template with 2 params char types and
40 * traits. We support only char and no traits.
41 */
42
43class ios_base
44{
45  public:
46    typedef int io_state;
47    typedef int open_mode;
48    typedef int seek_dir;
49    typedef std::streampos streampos;
50    typedef std::streamoff streamoff;
51
52
53  protected:
54    ios_base();
55
56  public:
57    virtual ~ios_base();
58
59    /**
60     * @return The precision (number of digits after the decimal
61     * point) to generate on certain output conversions. 6 by default.
62     */
63    streamsize precision() const { return mPrecision; }
64
65    /**
66     *  @param precision The new precision value. Values < 0 are ignored.
67     *  @return The previous value of precision(). 0 by default;
68     */
69    streamsize precision(streamsize precision);
70
71    /**
72     * @return The minimum field width to generate on output
73     * operations.
74     */
75    streamsize width() const { return mWidth; }
76
77    /**
78     *  @param width The new width value. Values < 0 are ignored.
79     *  @return The previous value of width().
80     */
81    streamsize width(streamsize width);
82
83private:
84    streamsize mPrecision;
85    streamsize mWidth;
86};
87
88}  // namespace std
89
90#endif
91