Move core/src/ up to core/.

core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.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 "core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.h"
-
-#include <vector>
-
-#include "core/include/fxcrt/fx_basic.h"
-
-namespace {
-
-int ShiftOr(int val, int bitwise_or_val) {
-  return (val << 1) | bitwise_or_val;
-}
-
-const struct ArithIntDecodeData {
-  int nNeedBits;
-  int nValue;
-} g_ArithIntDecodeData[] = {
-    {2, 0},
-    {4, 4},
-    {6, 20},
-    {8, 84},
-    {12, 340},
-    {32, 4436},
-};
-
-size_t RecursiveDecode(CJBig2_ArithDecoder* decoder,
-                       std::vector<JBig2ArithCtx>* context,
-                       int* prev,
-                       size_t depth) {
-  static const size_t kDepthEnd = FX_ArraySize(g_ArithIntDecodeData) - 1;
-  if (depth == kDepthEnd)
-    return kDepthEnd;
-
-  JBig2ArithCtx* pCX = &(*context)[*prev];
-  int D = decoder->DECODE(pCX);
-  *prev = ShiftOr(*prev, D);
-  if (!D)
-    return depth;
-  return RecursiveDecode(decoder, context, prev, depth + 1);
-}
-
-}  // namespace
-
-CJBig2_ArithIntDecoder::CJBig2_ArithIntDecoder() {
-  m_IAx.resize(512);
-}
-
-CJBig2_ArithIntDecoder::~CJBig2_ArithIntDecoder() {
-}
-
-bool CJBig2_ArithIntDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
-                                    int* nResult) {
-  int PREV = 1;
-  const int S = pArithDecoder->DECODE(&m_IAx[PREV]);
-  PREV = ShiftOr(PREV, S);
-
-  const size_t nDecodeDataIndex =
-      RecursiveDecode(pArithDecoder, &m_IAx, &PREV, 0);
-
-  int nTemp = 0;
-  for (int i = 0; i < g_ArithIntDecodeData[nDecodeDataIndex].nNeedBits; ++i) {
-    int D = pArithDecoder->DECODE(&m_IAx[PREV]);
-    PREV = ShiftOr(PREV, D);
-    if (PREV >= 256)
-      PREV = (PREV & 511) | 256;
-    nTemp = ShiftOr(nTemp, D);
-  }
-  int nValue = g_ArithIntDecodeData[nDecodeDataIndex].nValue;
-  nValue += nTemp;
-  if (S == 1 && nValue > 0)
-    nValue = -nValue;
-
-  *nResult = nValue;
-  return S != 1 || nValue != 0;
-}
-
-CJBig2_ArithIaidDecoder::CJBig2_ArithIaidDecoder(unsigned char SBSYMCODELENA)
-    : SBSYMCODELEN(SBSYMCODELENA) {
-  m_IAID.resize(1 << SBSYMCODELEN);
-}
-
-CJBig2_ArithIaidDecoder::~CJBig2_ArithIaidDecoder() {
-}
-
-void CJBig2_ArithIaidDecoder::decode(CJBig2_ArithDecoder* pArithDecoder,
-                                     FX_DWORD* nResult) {
-  int PREV = 1;
-  for (unsigned char i = 0; i < SBSYMCODELEN; ++i) {
-    JBig2ArithCtx* pCX = &m_IAID[PREV];
-    int D = pArithDecoder->DECODE(pCX);
-    PREV = ShiftOr(PREV, D);
-  }
-  *nResult = PREV - (1 << SBSYMCODELEN);
-}