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 34 namespace std { 35 36 // Type use by fpos. 37 typedef long long streamoff; 38 39 // Signed type for I/O operation counts and buffer sizes. 40 typedef 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 48 class 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 72 inline bool 73 operator==(const fpos& lhs, const fpos& rhs) 74 { return streamoff(lhs) == streamoff(rhs); } 75 76 inline bool 77 operator!=(const fpos& lhs, const fpos& rhs) 78 { return streamoff(lhs) != streamoff(rhs); } 79 80 typedef fpos streampos; 81 82 } // namespace std 83 84 #endif 85
