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// file : xsde/cxx/sequence-base.cxx
// 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> // memcpy, memmove
#include <xsde/cxx/sequence-base.hxx>
namespace xsde
{
namespace cxx
{
void sequence_base::
erase_ (void* vp, size_t es, move_forward_func mv)
{
char* p = static_cast<char*> (vp);
char* d = static_cast<char*> (data_);
if (mv)
mv (p, size_ - 1 - (p - d) / es);
else
memmove (p, p + es, (size_ - 1) * es - (p - d));
--size_;
}
#ifdef XSDE_EXCEPTIONS
struct guard
{
guard (void* p) : p_ (p) {}
~guard () {if (p_) operator delete (p_);}
void
release () { p_ = 0; }
private:
void* p_;
};
void sequence_base::
grow_ (size_t n, size_t es, move_func mv)
{
size_t c = n == 0 ? (capacity_ != 0 ? capacity_ * 2 : 8) : n;
void* d = operator new (c * es);
if (size_)
{
if (mv)
{
guard g (d);
mv (d, data_, size_);
g.release ();
}
else
memcpy (d, data_, size_ * es);
}
if (data_)
operator delete (data_);
data_ = d;
capacity_ = c;
}
void* sequence_base::
insert_ (void* vp, size_t es, move_func mv, move_backward_func mvb)
{
size_t i = static_cast<char*> (vp) - static_cast<char*> (data_);
if (capacity_ < size_ + 1)
grow_ (0, es, mv);
char* d = static_cast<char*> (data_);
char* p = d + i;
if (mvb)
mvb (p, size_ - i / es, size_); // increments size_
else
{
memmove (p + es, p, size_ * es - i);
++size_;
}
return p;
}
#else
sequence_base::error sequence_base::
grow_ (size_t n, size_t es, move_func mv)
{
size_t c = n == 0 ? (capacity_ != 0 ? capacity_ * 2 : 8) : n;
void* d = operator new (c * es);
if (d == 0)
return error_no_memory;
if (size_)
{
if (mv)
mv (d, data_, size_);
else
memcpy (d, data_, size_ * es);
}
if (data_)
operator delete (data_);
data_ = d;
capacity_ = c;
return error_none;
}
void* sequence_base::
insert_ (void* vp, size_t es, move_func mv, move_backward_func mvb)
{
size_t i = static_cast<char*> (vp) - static_cast<char*> (data_);
if (capacity_ < size_ + 1 && grow_ (0, es, mv) != error_none)
return 0;
char* d = static_cast<char*> (data_);
char* p = d + i;
if (mvb)
mvb (p, size_ - i / es);
else
memmove (p + es, p, size_ * es - i);
++size_;
return p;
}
#endif
}
}
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