libcxx/include/__ios/fpos.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP___IOS_FPOS_H
  11 #define _LIBCPP___IOS_FPOS_H
  12
  13 #include <__config>
  14 #include <__fwd/ios.h>
  15
  16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  17 #  pragma GCC system_header
  18 #endif
  19
  20 _LIBCPP_BEGIN_NAMESPACE_STD
  21
  22 template <class _StateT>
  23 class _LIBCPP_TEMPLATE_VIS fpos {
  24 private:
  25   _StateT __st_;
  26   streamoff __off_;
  27
  28 public:
  29   _LIBCPP_HIDE_FROM_ABI fpos(streamoff __off = streamoff()) : __st_(), __off_(__off) {}
  30
  31   _LIBCPP_HIDE_FROM_ABI operator streamoff() const { return __off_; }
  32
  33   _LIBCPP_HIDE_FROM_ABI _StateT state() const { return __st_; }
  34   _LIBCPP_HIDE_FROM_ABI void state(_StateT __st) { __st_ = __st; }
  35
  36   _LIBCPP_HIDE_FROM_ABI fpos& operator+=(streamoff __off) {
  37     __off_ += __off;
  38     return *this;
  39   }
  40
  41   _LIBCPP_HIDE_FROM_ABI fpos operator+(streamoff __off) const {
  42     fpos __t(*this);
  43     __t += __off;
  44     return __t;
  45   }
  46
  47   _LIBCPP_HIDE_FROM_ABI fpos& operator-=(streamoff __off) {
  48     __off_ -= __off;
  49     return *this;
  50   }
  51
  52   _LIBCPP_HIDE_FROM_ABI fpos operator-(streamoff __off) const {
  53     fpos __t(*this);
  54     __t -= __off;
  55     return __t;
  56   }
  57 };
  58
  59 template <class _StateT>
  60 inline _LIBCPP_HIDE_FROM_ABI
  61 streamoff operator-(const fpos<_StateT>& __x, const fpos<_StateT>& __y) {
  62   return streamoff(__x) - streamoff(__y);
  63 }
  64
  65 template <class _StateT>
  66 inline _LIBCPP_HIDE_FROM_ABI
  67 bool operator==(const fpos<_StateT>& __x, const fpos<_StateT>& __y) {
  68   return streamoff(__x) == streamoff(__y);
  69 }
  70
  71 template <class _StateT>
  72 inline _LIBCPP_HIDE_FROM_ABI
  73 bool operator!=(const fpos<_StateT>& __x, const fpos<_StateT>& __y) {
  74   return streamoff(__x) != streamoff(__y);
  75 }
  76
  77 _LIBCPP_END_NAMESPACE_STD
  78
  79 #endif // _LIBCPP___IOS_FPOS_H