_STLP_EXP_DECLSPEC strstreambuf::strstreambuf(__alloc_fn alloc_f, __free_fn free_f)
: _M_alloc_fun(alloc_f), _M_free_fun(free_f),
_M_dynamic(true), _M_frozen(false), _M_constant(false)
#ifdef __SYMBIAN32__
, _pfrozenendsave(NULL)
,_pgetfrozenendsave( NULL)
#endif
{
streamsize n = 16;
#ifndef __SYMBIAN32__
char* buf = _M_alloc(n);
#else
char* buf = NULL;
if(alloc_f!=NULL)
buf = (char*)_M_alloc_fun(n);
else
buf = _M_alloc(n);
if(buf)
*buf = '\0';
#endif
if (buf) {
setp(buf, buf + n);
setg(buf, buf, buf);
}
}
strstreambuf::strstreambuf(__alloc_fn alloc_f, __free_fn free_f)
: _M_alloc_fun(alloc_f), _M_free_fun(free_f),
_M_dynamic(true), _M_frozen(false), _M_constant(false) {
size_t n = 16;
char* buf = _M_alloc(n);
if (buf) {
setp(buf, buf + n);
setg(buf, buf, buf);
}
}
_STLP_EXP_DECLSPEC strstreambuf::int_type strstreambuf::overflow(int_type c) {
if (c == traits_type::eof())
return traits_type::not_eof(c);
#ifdef __SYMBIAN32__
if (pptr() != 0 && pptr() < epptr())
{
*pptr() = c;
pbump(1);
return c;
}
if (!_M_dynamic || _M_constant || _M_frozen)
return (EOF); // can't extend
#endif
// Try to expand the buffer.
if (pptr() == epptr() && _M_dynamic && !_M_frozen && !_M_constant) {
ptrdiff_t old_size = epptr() - pbase();
ptrdiff_t new_size = (max)(2 * old_size, ptrdiff_t(1));
char* buf = _M_alloc(new_size);
if (buf) {
memcpy(buf, pbase(), old_size);
char* old_buffer = pbase();
bool reposition_get = false;
ptrdiff_t old_get_offset;
if (gptr() != 0) {
reposition_get = true;
old_get_offset = gptr() - eback();
}
setp(buf, buf + new_size);
pbump((int)old_size);
if (reposition_get)
setg(buf, buf + old_get_offset, buf + (max)(old_get_offset, old_size));
_M_free(old_buffer);
}
}
if (pptr() != epptr()) {
*pptr() = c;
pbump(1);
return c;
}
else
return traits_type::eof();
}
_STLP_BEGIN_NAMESPACE
// strstreambuf constructor, destructor.
strstreambuf::strstreambuf(streamsize initial_capacity)
: _M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(true), _M_frozen(false), _M_constant(false) {
size_t n = (sizeof(streamsize) > sizeof(size_t)) ? __STATIC_CAST(size_t, (min)(__STATIC_CAST(streamsize, (numeric_limits<size_t>::max)()),
(max)(initial_capacity, streamsize(16))))
: __STATIC_CAST(size_t, (max)(initial_capacity, streamsize(16)));
char* buf = _M_alloc(n);
if (buf) {
setp(buf, buf + n);
setg(buf, buf, buf);
}
}
strstreambuf::int_type strstreambuf::overflow(int_type c) {
if (c == traits_type::eof())
return traits_type::not_eof(c);
// Try to expand the buffer.
if (pptr() == epptr() && _M_dynamic && !_M_frozen && !_M_constant) {
ptrdiff_t old_size = epptr() - pbase();
ptrdiff_t new_size = (max)(2 * old_size, ptrdiff_t(1));
char* buf = _M_alloc(new_size);
if (buf) {
memcpy(buf, pbase(), old_size);
char* old_buffer = pbase();
bool reposition_get = false;
ptrdiff_t old_get_offset;
if (gptr() != 0) {
reposition_get = true;
old_get_offset = gptr() - eback();
}
setp(buf, buf + new_size);
pbump((int)old_size);
if (reposition_get)
setg(buf, buf + old_get_offset, buf + (max)(old_get_offset, old_size));
_M_free(old_buffer);
}
}
if (pptr() != epptr()) {
*pptr() = traits_type::to_char_type(c);
pbump(1);
return c;
}
else
return traits_type::eof();
}
_STLP_BEGIN_NAMESPACE
// strstreambuf constructor, destructor.
_STLP_EXP_DECLSPEC strstreambuf::strstreambuf(streamsize initial_capacity)
: _M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(true), _M_frozen(false), _M_constant(false)
#ifdef __SYMBIAN32__
, _pfrozenendsave(NULL)
,_pgetfrozenendsave( NULL)
#endif
{
streamsize n = (max)(initial_capacity, streamsize(16));
char* buf = _M_alloc(n);
#ifdef __SYMBIAN32__
*buf = '\0';
#endif
if (buf) {
setp(buf, buf + n);
setg(buf, buf, buf);
}
}