core/src/fxcodec/jbig2/JBig2_SymbolDict.cpp

// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "JBig2_SymbolDict.h"

#include "../../../include/fxcrt/fx_memory.h"
#include "JBig2_Image.h"

CJBig2_SymbolDict::CJBig2_SymbolDict() {
  SDNUMEXSYMS = 0;
  SDEXSYMS = NULL;
  m_bContextRetained = FALSE;
  m_gbContext = m_grContext = NULL;
}

nonstd::unique_ptr<CJBig2_SymbolDict> CJBig2_SymbolDict::DeepCopy() const {
  nonstd::unique_ptr<CJBig2_SymbolDict> dst;
  const CJBig2_SymbolDict* src = this;
  if (src->m_bContextRetained || src->m_gbContext || src->m_grContext)
    return dst;

  dst.reset(new CJBig2_SymbolDict);
  dst->SDNUMEXSYMS = src->SDNUMEXSYMS;
  dst->SDEXSYMS = FX_Alloc(CJBig2_Image*, src->SDNUMEXSYMS);
  for (FX_DWORD i = 0; i < src->SDNUMEXSYMS; ++i) {
    if (src->SDEXSYMS[i]) {
      dst->SDEXSYMS[i] = new CJBig2_Image(*(src->SDEXSYMS[i]));
    } else {
      dst->SDEXSYMS[i] = NULL;
    }
  }
  return dst;
}

CJBig2_SymbolDict::~CJBig2_SymbolDict() {
  if (SDEXSYMS) {
    for (FX_DWORD i = 0; i < SDNUMEXSYMS; i++) {
      delete SDEXSYMS[i];
    }
    FX_Free(SDEXSYMS);
  }
  if (m_bContextRetained) {
    FX_Free(m_gbContext);
    FX_Free(m_grContext);
  }
}