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// file : xsde/cxx/buffer.ixx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2005-2009 Code Synthesis Tools CC
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#include <string.h> // memcmp
namespace xsde
{
namespace cxx
{
// c-tors & d-tor
//
inline buffer::
~buffer ()
{
if (data_)
operator delete (data_);
}
inline buffer::
buffer ()
: data_ (0), size_ (0), capacity_ (0)
{
}
#ifndef XSDE_EXCEPTIONS
inline buffer::error buffer::
#else
inline void buffer::
#endif
attach (void* data, size_t size, size_t cap)
{
if (size > cap)
{
#ifdef XSDE_EXCEPTIONS
throw bounds ();
#else
return error_bounds;
#endif
}
if (data_)
operator delete (data_);
data_ = reinterpret_cast<char*> (data);
size_ = size;
capacity_ = cap;
#ifndef XSDE_EXCEPTIONS
return error_none;
#endif
}
inline void* buffer::
detach ()
{
void* r = data_;
data_ = 0;
size_ = 0;
capacity_ = 0;
return r;
}
inline void buffer::
swap (buffer& other)
{
char* d = data_;
size_t s = size_;
size_t c = capacity_;
data_ = other.data_;
size_ = other.size_;
capacity_ = other.capacity_;
other.data_ = d;
other.size_ = s;
other.capacity_ = c;
}
//
//
inline size_t buffer::
capacity () const
{
return capacity_;
}
#ifdef XSDE_EXCEPTIONS
inline bool buffer::
capacity (size_t cap)
{
return capacity (cap, true);
}
#else
inline buffer::error buffer::
capacity (size_t cap)
{
return capacity (cap, true, 0);
}
inline buffer::error buffer::
capacity (size_t cap, bool& moved)
{
return capacity (cap, true, &moved);
}
#endif
inline size_t buffer::
size () const
{
return size_;
}
#ifdef XSDE_EXCEPTIONS
inline bool buffer::
size (size_t size)
{
bool r = false;
if (size > capacity_)
r = capacity (size);
size_ = size;
return r;
}
#else
inline buffer::error buffer::
size (size_t size)
{
error r = error_none;
if (size > capacity_)
r = capacity (size);
if (r == error_none)
size_ = size;
return r;
}
inline buffer::error buffer::
size (size_t size, bool& moved)
{
error r = error_none;
moved = false;
if (size > capacity_)
r = capacity (size, moved);
if (r == error_none)
size_ = size;
return r;
}
#endif
//
//
inline const char* buffer::
data () const
{
return data_;
}
inline char* buffer::
data ()
{
return data_;
}
inline const char* buffer::
begin () const
{
return data_;
}
inline char* buffer::
begin ()
{
return data_;
}
inline const char* buffer::
end () const
{
return data_ + size_;
}
inline char* buffer::
end ()
{
return data_ + size_;
}
inline bool
operator== (const buffer& x, const buffer& y)
{
return x.size () == y.size () &&
memcmp (x.data (), y.data (), x.size ()) == 0;
}
inline bool
operator!= (const buffer& x, const buffer& y)
{
return !(x == y);
}
}
}
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