Method push_pop

lib_acl_cpp/src/stdlib/pipe_stream.cpp:28–56

}

int pipe_string::push_pop(const char* in, size_t len, string* out, size_t max)
{
	if (in && len > 0) {
		m_pBuf->append(in, len);
	}

	if (out == NULL) {
		return 0;
	}

	len = m_pBuf->length();
	acl_assert(len >= m_pos);
	len -= m_pos;

	if (len == 0) {
		return 0;
	}
	
	size_t n;
	if (max > 0) {
		n = max > len ? len : max;
	} else {
		n = len;
	}

	out->append(m_pBuf->c_str() + m_pos, n);
	m_pos += n;
	return (int) n;
}

int pipe_string::pop_end(string* out, size_t max /* = 0 */)
{