iris/src/buffered_writer.cpp

   1 #include <buffered_writer.h>
   2
   3 using namespace iris;
   4
   5 buffered_writer::buffered_writer(writer & wter, size_t cap): m_w(wter), m_buf(nullptr), m_pos(0), m_capacity(cap) {
   6     if (m_capacity) {
   7         m_buf = new char[m_capacity];
   8     }
   9 }
  10
  11 buffered_writer::~buffered_writer() {
  12     if (m_buf) {
  13         delete[] m_buf;
  14         m_buf = nullptr;
  15         m_pos = m_capacity = 0;
  16     }
  17 }
  18
  19 void buffered_writer::expand(size_t n) {
  20     if (n <= m_capacity)
  21         return;
  22     char *tmp_buf = new char[n];
  23     memcpy(tmp_buf, this->m_buf, this->size());
  24     delete[] this->m_buf;
  25     this->m_buf = tmp_buf;
  26     this->m_capacity = n;
  27 }