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_POS_TYPES__
31#define ANDROID_ASTL_IOS_POS_TYPES__
32
33#include <cstddef>  // ptrdiff_t
34namespace std {
35
36// Type use by fpos.
37typedef long long streamoff;
38
39// Signed type for I/O operation counts and buffer sizes.
40typedef ptrdiff_t  streamsize;
41
42// In the regular STL fpos is a template which gets specialized for
43// char and wchar and defines 2 types streampos and wstreampos. Since
44// we don't support wchar, we just provide the final char compliant
45// version.  The methods to get/set the mbstate in fpos are not
46// provided.
47
48class fpos {
49  public:
50    fpos() : mOffs(0) { }
51    fpos(streamoff offs) : mOffs(offs) { }
52
53    // Convert to streamoff.
54    operator streamoff() const { return mOffs; }
55
56    // Not supported:
57    // void state(mbstate_t);
58    // mbstate_t state() const;
59
60    fpos& operator+=(streamoff offs);
61    fpos& operator-=(streamoff offs) {
62        return operator+=(-offs);
63    }
64
65    fpos operator+(streamoff offs) const;
66    fpos operator-(streamoff offs) const;
67
68  private:
69    streamoff mOffs;
70};
71
72inline bool
73operator==(const fpos& lhs, const fpos& rhs)
74{ return streamoff(lhs) == streamoff(rhs); }
75
76inline bool
77operator!=(const fpos& lhs, const fpos& rhs)
78{ return streamoff(lhs) != streamoff(rhs); }
79
80typedef fpos streampos;
81
82}  // namespace std
83
84#endif
85