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// file : xsde/cxx/string.cxx
// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#include <string.h>
#include <xsde/cxx/string.hxx>
namespace xsde
{
namespace cxx
{
string::error string::
assign (const char* s, size_t size)
{
if (size + 1 > capacity_)
if (error e = resize (size + 1, false))
return e;
if (size != 0)
memcpy (data_, s, size);
data_[size] = '\0';
size_ = size;
return error_none;
}
string::error string::
append (const char* s, size_t size)
{
if (size_ + size + 1 > capacity_)
if (error e = resize (size_ + size + 1, true))
return e;
if (size != 0)
memcpy (data_ + size_, s, size);
size_ += size;
data_[size_] = '\0';
return error_none;
}
string::error string::
resize (size_t new_cap, bool copy)
{
// Start with at least 64 chars (32 * 2).
//
size_t cap = capacity_ ? capacity_ : 32;
if (new_cap <= 2 * cap)
new_cap = 2 * cap;
else
new_cap += (new_cap & 1) ? 1 : 0; // Make even.
#ifndef XSDE_CUSTOM_ALLOCATOR
char* p = new char[new_cap];
#else
char* p = static_cast<char*> (alloc (new_cap));
#endif
if (p == 0)
return error_no_memory;
if (copy && size_ != 0)
memcpy (p, data_, size_ + 1);
#ifndef XSDE_CUSTOM_ALLOCATOR
delete[] data_;
#else
cxx::free (data_);
#endif
data_ = p;
capacity_ = new_cap;
return error_none;
}
}
}
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