Merge to XFA: Fix a bunch of sign mismatch warnings.

Also remove some gotos and move code into an anonymous namespace.

And then do the partial revert to avoid size_t going negative.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1356373003 .
Review URL: https://codereview.chromium.org/1400723002 .

(cherry picked from commit d03ba8d1a5928e8f3f6bd7da063b53b0bc40abfd)
(cherry picked from commit a398ca611d1925182ff6a4e8b2b43c277c364dc0)

Review URL: https://codereview.chromium.org/1406373002 .

13 files changed, 748 insertions, 619 deletions

diff --git a/core/src/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp b/core/src/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp
index 8b0bff0257..252a4d6e4f 100644
--- a/core/src/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp
+++ b/core/src/fpdfapi/fpdf_cmaps/fpdf_cmaps.cpp
@@ -8,6 +8,7 @@
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../fpdf_font/font_int.h"
 #include "cmap_int.h"
+
 void FPDFAPI_FindEmbeddedCMap(const char* name,
                               int charset,
                               int coding,
@@ -179,7 +180,8 @@ FX_DWORD FPDFAPI_CharCodeFromCID(const FXCMAP_CMap* pMap, FX_WORD cid) {
   }
   return 0;
 }
-void FPDFAPI_LoadCID2UnicodeMap(int charset,
+
+void FPDFAPI_LoadCID2UnicodeMap(CIDSet charset,
                                 const FX_WORD*& pMap,
                                 FX_DWORD& count) {
   CPDF_FontGlobals* pFontGlobals =
diff --git a/core/src/fpdfapi/fpdf_font/font_int.h b/core/src/fpdfapi/fpdf_font/font_int.h
index 79c25219a0..48e58d6345 100644
--- a/core/src/fpdfapi/fpdf_font/font_int.h
+++ b/core/src/fpdfapi/fpdf_font/font_int.h
@@ -27,13 +27,13 @@ class CPDF_CMapManager {
   CPDF_CMapManager();
   ~CPDF_CMapManager();
   void* GetPackage(FX_BOOL bPrompt);
-  CPDF_CMap* GetPredefinedCMap(const CFX_ByteString& name, FX_BOOL bPrompt);
-  CPDF_CID2UnicodeMap* GetCID2UnicodeMap(int charset, FX_BOOL bPrompt);
+  CPDF_CMap* GetPredefinedCMap(const CFX_ByteString& name, FX_BOOL bPromptCJK);
+  CPDF_CID2UnicodeMap* GetCID2UnicodeMap(CIDSet charset, FX_BOOL bPromptCJK);
   void ReloadAll();
 
  private:
-  CPDF_CMap* LoadPredefinedCMap(const CFX_ByteString& name, FX_BOOL bPrompt);
-  CPDF_CID2UnicodeMap* LoadCID2UnicodeMap(int charset, FX_BOOL bPrompt);
+  CPDF_CMap* LoadPredefinedCMap(const CFX_ByteString& name, FX_BOOL bPromptCJK);
+  CPDF_CID2UnicodeMap* LoadCID2UnicodeMap(CIDSet charset, FX_BOOL bPromptCJK);
 
   FX_BOOL m_bPrompted;
   std::map<CFX_ByteString, CPDF_CMap*> m_CMaps;
@@ -51,21 +51,23 @@ class CPDF_FontGlobals {
   struct {
     const struct FXCMAP_CMap* m_pMapList;
     int m_Count;
-  } m_EmbeddedCharsets[NUMBER_OF_CIDSETS];
+  } m_EmbeddedCharsets[CIDSET_NUM_SETS];
   struct {
     const FX_WORD* m_pMap;
     int m_Count;
-  } m_EmbeddedToUnicodes[NUMBER_OF_CIDSETS];
+  } m_EmbeddedToUnicodes[CIDSET_NUM_SETS];
 
  private:
   CFX_MapPtrToPtr m_pStockMap;
   uint8_t* m_pContrastRamps;
 };
-struct _CMap_CodeRange {
+
+struct CMap_CodeRange {
   int m_CharSize;
   uint8_t m_Lower[4];
   uint8_t m_Upper[4];
 };
+
 class CPDF_CMapParser {
  public:
   CPDF_CMapParser();
@@ -79,7 +81,7 @@ class CPDF_CMapParser {
   int m_Status;
   int m_CodeSeq;
   FX_DWORD m_CodePoints[4];
-  CFX_ArrayTemplate<_CMap_CodeRange> m_CodeRanges;
+  CFX_ArrayTemplate<CMap_CodeRange> m_CodeRanges;
   CFX_ByteString m_Registry, m_Ordering, m_Supplement;
   CFX_ByteString m_LastWord;
 };
@@ -100,7 +102,6 @@ class CPDF_CMap {
   FX_BOOL LoadEmbedded(const uint8_t* pData, FX_DWORD dwSize);
   void Release();
   FX_BOOL IsLoaded() const { return m_bLoaded; }
-  int GetCharset() { return m_Charset; }
   FX_BOOL IsVertWriting() const { return m_bVertical; }
   FX_WORD CIDFromCharCode(FX_DWORD charcode) const;
   FX_DWORD CharCodeFromCID(FX_WORD CID) const;
@@ -124,7 +125,8 @@ class CPDF_CMap {
  protected:
   CFX_ByteString m_PredefinedCMap;
   FX_BOOL m_bVertical;
-  int m_Charset, m_Coding;
+  CIDSet m_Charset;
+  int m_Coding;
   CodingScheme m_CodingScheme;
   int m_nCodeRanges;
   uint8_t* m_pLeadingBytes;
@@ -134,15 +136,7 @@ class CPDF_CMap {
   const FXCMAP_CMap* m_pEmbedMap;
   CPDF_CMap* m_pUseMap;
 };
-class CPDF_PredefinedCMap {
- public:
-  const FX_CHAR* m_pName;
-  int m_Charset;
-  int m_Coding;
-  CPDF_CMap::CodingScheme m_CodingScheme;
-  FX_DWORD m_LeadingSegCount;
-  uint8_t m_LeadingSegs[4];
-};
+
 typedef struct _FileHeader {
   uint8_t btTag[4];
   uint8_t btVersion;
@@ -154,20 +148,22 @@ typedef struct _FileHeader {
   FX_DWORD dwDataOffset;
   FX_DWORD dwRecordSize;
 } FXMP_FILEHEADER;
+
 class CPDF_CID2UnicodeMap {
  public:
   CPDF_CID2UnicodeMap();
   ~CPDF_CID2UnicodeMap();
   FX_BOOL Initialize();
   FX_BOOL IsLoaded();
-  void Load(CPDF_CMapManager* pMgr, int charset, FX_BOOL bPromptCJK);
+  void Load(CPDF_CMapManager* pMgr, CIDSet charset, FX_BOOL bPromptCJK);
   FX_WCHAR UnicodeFromCID(FX_WORD CID);
 
  protected:
-  int m_Charset;
+  CIDSet m_Charset;
   const FX_WORD* m_pEmbeddedMap;
   FX_DWORD m_EmbeddedCount;
 };
+
 class CPDF_ToUnicodeMap {
  public:
   void Load(CPDF_Stream* pStream);
@@ -185,4 +181,8 @@ class CPDF_FontCharMap : public CFX_CharMap {
   CPDF_Font* m_pFont;
 };
 
+void FPDFAPI_LoadCID2UnicodeMap(CIDSet charset,
+                                const FX_WORD*& pMap,
+                                FX_DWORD& count);
+
 #endif  // CORE_SRC_FPDFAPI_FPDF_FONT_FONT_INT_H_
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
index 3157b36fbd..c52b4fe278 100644
--- a/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
+++ b/core/src/fpdfapi/fpdf_font/fpdf_font.cpp
@@ -38,7 +38,7 @@ class CFX_StockFontArray {
     FXSYS_memset(m_pStockFonts, 0, sizeof(m_pStockFonts));
   }
   ~CFX_StockFontArray() {
-    for (int i = 0; i < FX_ArraySize(m_pStockFonts); i++) {
+    for (size_t i = 0; i < FX_ArraySize(m_pStockFonts); i++) {
       if (!m_pStockFonts[i])
         continue;
       CPDF_Dictionary* pFontDict = m_pStockFonts[i]->GetFontDict();
@@ -592,7 +592,7 @@ static CFX_WideString _StringToWideString(const CFX_ByteStringC& str) {
   return result;
 }
 void CPDF_ToUnicodeMap::Load(CPDF_Stream* pStream) {
-  int CIDSet = 0;
+  CIDSet cid_set = CIDSET_UNKNOWN;
   CPDF_StreamAcc stream;
   stream.LoadAllData(pStream, FALSE);
   CPDF_SimpleParser parser(stream.GetData(), stream.GetSize());
@@ -680,20 +680,20 @@ void CPDF_ToUnicodeMap::Load(CPDF_Stream* pStream) {
         }
       }
     } else if (word == FX_BSTRC("/Adobe-Korea1-UCS2")) {
-      CIDSet = CIDSET_KOREA1;
+      cid_set = CIDSET_KOREA1;
     } else if (word == FX_BSTRC("/Adobe-Japan1-UCS2")) {
-      CIDSet = CIDSET_JAPAN1;
+      cid_set = CIDSET_JAPAN1;
     } else if (word == FX_BSTRC("/Adobe-CNS1-UCS2")) {
-      CIDSet = CIDSET_CNS1;
+      cid_set = CIDSET_CNS1;
     } else if (word == FX_BSTRC("/Adobe-GB1-UCS2")) {
-      CIDSet = CIDSET_GB1;
+      cid_set = CIDSET_GB1;
     }
   }
-  if (CIDSet) {
+  if (cid_set) {
     m_pBaseMap = CPDF_ModuleMgr::Get()
                      ->GetPageModule()
                      ->GetFontGlobals()
-                     ->m_CMapManager.GetCID2UnicodeMap(CIDSet, FALSE);
+                     ->m_CMapManager.GetCID2UnicodeMap(cid_set, FALSE);
   } else {
     m_pBaseMap = NULL;
   }
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
index 0744c896ce..b87ad18c02 100644
--- a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
+++ b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp
@@ -12,6 +12,584 @@
 #include "../fpdf_cmaps/cmap_int.h"
 #include "font_int.h"
 
+namespace {
+
+const FX_CHAR* const g_CharsetNames[CIDSET_NUM_SETS] =
+    {nullptr, "GB1", "CNS1", "Japan1", "Korea1", "UCS"};
+
+const int g_CharsetCPs[CIDSET_NUM_SETS] = {0, 936, 950, 932, 949, 1200};
+
+class CPDF_PredefinedCMap {
+ public:
+  const FX_CHAR* m_pName;
+  CIDSet m_Charset;
+  int m_Coding;
+  CPDF_CMap::CodingScheme m_CodingScheme;
+  FX_DWORD m_LeadingSegCount;
+  uint8_t m_LeadingSegs[4];
+};
+
+const CPDF_PredefinedCMap g_PredefinedCMaps[] = {
+    {"GB-EUC",
+     CIDSET_GB1,
+     CIDCODING_GB,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0xa1, 0xfe}},
+    {"GBpc-EUC",
+     CIDSET_GB1,
+     CIDCODING_GB,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0xa1, 0xfc}},
+    {"GBK-EUC",
+     CIDSET_GB1,
+     CIDCODING_GB,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0x81, 0xfe}},
+    {"GBKp-EUC",
+     CIDSET_GB1,
+     CIDCODING_GB,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0x81, 0xfe}},
+    {"GBK2K-EUC",
+     CIDSET_GB1,
+     CIDCODING_GB,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0x81, 0xfe}},
+    {"GBK2K",
+     CIDSET_GB1,
+     CIDCODING_GB,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0x81, 0xfe}},
+    {"UniGB-UCS2", CIDSET_GB1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
+    {"UniGB-UTF16", CIDSET_GB1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
+    {"B5pc",
+     CIDSET_CNS1,
+     CIDCODING_BIG5,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0xa1, 0xfc}},
+    {"HKscs-B5",
+     CIDSET_CNS1,
+     CIDCODING_BIG5,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0x88, 0xfe}},
+    {"ETen-B5",
+     CIDSET_CNS1,
+     CIDCODING_BIG5,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0xa1, 0xfe}},
+    {"ETenms-B5",
+     CIDSET_CNS1,
+     CIDCODING_BIG5,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0xa1, 0xfe}},
+    {"UniCNS-UCS2", CIDSET_CNS1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
+    {"UniCNS-UTF16", CIDSET_CNS1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
+    {"83pv-RKSJ",
+     CIDSET_JAPAN1,
+     CIDCODING_JIS,
+     CPDF_CMap::MixedTwoBytes,
+     2,
+     {0x81, 0x9f, 0xe0, 0xfc}},
+    {"90ms-RKSJ",
+     CIDSET_JAPAN1,
+     CIDCODING_JIS,
+     CPDF_CMap::MixedTwoBytes,
+     2,
+     {0x81, 0x9f, 0xe0, 0xfc}},
+    {"90msp-RKSJ",
+     CIDSET_JAPAN1,
+     CIDCODING_JIS,
+     CPDF_CMap::MixedTwoBytes,
+     2,
+     {0x81, 0x9f, 0xe0, 0xfc}},
+    {"90pv-RKSJ",
+     CIDSET_JAPAN1,
+     CIDCODING_JIS,
+     CPDF_CMap::MixedTwoBytes,
+     2,
+     {0x81, 0x9f, 0xe0, 0xfc}},
+    {"Add-RKSJ",
+     CIDSET_JAPAN1,
+     CIDCODING_JIS,
+     CPDF_CMap::MixedTwoBytes,
+     2,
+     {0x81, 0x9f, 0xe0, 0xfc}},
+    {"EUC",
+     CIDSET_JAPAN1,
+     CIDCODING_JIS,
+     CPDF_CMap::MixedTwoBytes,
+     2,
+     {0x8e, 0x8e, 0xa1, 0xfe}},
+    {"H", CIDSET_JAPAN1, CIDCODING_JIS, CPDF_CMap::TwoBytes, 1, {0x21, 0x7e}},
+    {"V", CIDSET_JAPAN1, CIDCODING_JIS, CPDF_CMap::TwoBytes, 1, {0x21, 0x7e}},
+    {"Ext-RKSJ",
+     CIDSET_JAPAN1,
+     CIDCODING_JIS,
+     CPDF_CMap::MixedTwoBytes,
+     2,
+     {0x81, 0x9f, 0xe0, 0xfc}},
+    {"UniJIS-UCS2", CIDSET_JAPAN1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
+    {"UniJIS-UCS2-HW", CIDSET_JAPAN1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
+    {"UniJIS-UTF16", CIDSET_JAPAN1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
+    {"KSC-EUC",
+     CIDSET_KOREA1,
+     CIDCODING_KOREA,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0xa1, 0xfe}},
+    {"KSCms-UHC",
+     CIDSET_KOREA1,
+     CIDCODING_KOREA,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0x81, 0xfe}},
+    {"KSCms-UHC-HW",
+     CIDSET_KOREA1,
+     CIDCODING_KOREA,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0x81, 0xfe}},
+    {"KSCpc-EUC",
+     CIDSET_KOREA1,
+     CIDCODING_KOREA,
+     CPDF_CMap::MixedTwoBytes,
+     1,
+     {0xa1, 0xfd}},
+    {"UniKS-UCS2", CIDSET_KOREA1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
+    {"UniKS-UTF16", CIDSET_KOREA1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
+};
+
+CIDSet CIDSetFromSizeT(size_t index) {
+  if (index >= CIDSET_NUM_SETS) {
+    NOTREACHED();
+    return CIDSET_UNKNOWN;
+  }
+  return static_cast<CIDSet>(index);
+}
+
+CIDSet CharsetFromOrdering(const CFX_ByteString& ordering) {
+  for (size_t charset = 1; charset < FX_ArraySize(g_CharsetNames); ++charset) {
+    if (ordering == CFX_ByteStringC(g_CharsetNames[charset]))
+      return CIDSetFromSizeT(charset);
+  }
+  return CIDSET_UNKNOWN;
+}
+
+FX_DWORD CMap_GetCode(const CFX_ByteStringC& word) {
+  int num = 0;
+  if (word.GetAt(0) == '<') {
+    for (int i = 1; i < word.GetLength(); i++) {
+      uint8_t digit = word.GetAt(i);
+      if (digit >= '0' && digit <= '9') {
+        digit = digit - '0';
+      } else if (digit >= 'a' && digit <= 'f') {
+        digit = digit - 'a' + 10;
+      } else if (digit >= 'A' && digit <= 'F') {
+        digit = digit - 'A' + 10;
+      } else {
+        return num;
+      }
+      num = num * 16 + digit;
+    }
+  } else {
+    for (int i = 0; i < word.GetLength(); i++) {
+      if (word.GetAt(i) < '0' || word.GetAt(i) > '9') {
+        return num;
+      }
+      num = num * 10 + word.GetAt(i) - '0';
+    }
+  }
+  return num;
+}
+
+bool CMap_GetCodeRange(CMap_CodeRange& range,
+                       const CFX_ByteStringC& first,
+                       const CFX_ByteStringC& second) {
+  if (first.GetLength() == 0 || first.GetAt(0) != '<')
+    return false;
+
+  int i;
+  for (i = 1; i < first.GetLength(); ++i) {
+    if (first.GetAt(i) == '>') {
+      break;
+    }
+  }
+  range.m_CharSize = (i - 1) / 2;
+  if (range.m_CharSize > 4)
+    return false;
+
+  for (i = 0; i < range.m_CharSize; ++i) {
+    uint8_t digit1 = first.GetAt(i * 2 + 1);
+    uint8_t digit2 = first.GetAt(i * 2 + 2);
+    uint8_t byte = (digit1 >= '0' && digit1 <= '9')
+                       ? (digit1 - '0')
+                       : ((digit1 & 0xdf) - 'A' + 10);
+    byte = byte * 16 + ((digit2 >= '0' && digit2 <= '9')
+                            ? (digit2 - '0')
+                            : ((digit2 & 0xdf) - 'A' + 10));
+    range.m_Lower[i] = byte;
+  }
+
+  FX_DWORD size = second.GetLength();
+  for (i = 0; i < range.m_CharSize; ++i) {
+    uint8_t digit1 =
+        ((FX_DWORD)i * 2 + 1 < size) ? second.GetAt((FX_STRSIZE)i * 2 + 1) : 0;
+    uint8_t digit2 =
+        ((FX_DWORD)i * 2 + 2 < size) ? second.GetAt((FX_STRSIZE)i * 2 + 2) : 0;
+    uint8_t byte = (digit1 >= '0' && digit1 <= '9')
+                       ? (digit1 - '0')
+                       : ((digit1 & 0xdf) - 'A' + 10);
+    byte = byte * 16 + ((digit2 >= '0' && digit2 <= '9')
+                            ? (digit2 - '0')
+                            : ((digit2 & 0xdf) - 'A' + 10));
+    range.m_Upper[i] = byte;
+  }
+  return true;
+}
+
+CFX_ByteString CMap_GetString(const CFX_ByteStringC& word) {
+  return word.Mid(1, word.GetLength() - 2);
+}
+
+int CompareDWORD(const void* data1, const void* data2) {
+  return (*(FX_DWORD*)data1) - (*(FX_DWORD*)data2);
+}
+
+int CompareCID(const void* key, const void* element) {
+  if ((*(FX_DWORD*)key) < (*(FX_DWORD*)element)) {
+    return -1;
+  }
+  if ((*(FX_DWORD*)key) >
+      (*(FX_DWORD*)element) + ((FX_DWORD*)element)[1] / 65536) {
+    return 1;
+  }
+  return 0;
+}
+
+int CheckCodeRange(uint8_t* codes,
+                   int size,
+                   CMap_CodeRange* pRanges,
+                   int nRanges) {
+  int iSeg = nRanges - 1;
+  while (iSeg >= 0) {
+    if (pRanges[iSeg].m_CharSize < size) {
+      --iSeg;
+      continue;
+    }
+    int iChar = 0;
+    while (iChar < size) {
+      if (codes[iChar] < pRanges[iSeg].m_Lower[iChar] ||
+          codes[iChar] > pRanges[iSeg].m_Upper[iChar]) {
+        break;
+      }
+      ++iChar;
+    }
+    if (iChar == pRanges[iSeg].m_CharSize)
+      return 2;
+
+    if (iChar)
+      return (size == pRanges[iSeg].m_CharSize) ? 2 : 1;
+    iSeg--;
+  }
+  return 0;
+}
+
+int GetCharSizeImpl(FX_DWORD charcode,
+                    CMap_CodeRange* pRanges,
+                    int iRangesSize) {
+  if (!iRangesSize)
+    return 1;
+
+  uint8_t codes[4];
+  codes[0] = codes[1] = 0x00;
+  codes[2] = (uint8_t)(charcode >> 8 & 0xFF);
+  codes[3] = (uint8_t)charcode;
+  int offset = 0;
+  int size = 4;
+  for (int i = 0; i < 4; ++i) {
+    int iSeg = iRangesSize - 1;
+    while (iSeg >= 0) {
+      if (pRanges[iSeg].m_CharSize < size) {
+        --iSeg;
+        continue;
+      }
+      int iChar = 0;
+      while (iChar < size) {
+        if (codes[offset + iChar] < pRanges[iSeg].m_Lower[iChar] ||
+            codes[offset + iChar] > pRanges[iSeg].m_Upper[iChar]) {
+          break;
+        }
+        ++iChar;
+      }
+      if (iChar == pRanges[iSeg].m_CharSize)
+        return size;
+      --iSeg;
+    }
+    --size;
+    ++offset;
+  }
+  return 1;
+}
+
+bool IsValidEmbeddedCharcodeFromUnicodeCharset(CIDSet charset) {
+  switch (charset) {
+    case CIDSET_GB1:
+    case CIDSET_CNS1:
+    case CIDSET_JAPAN1:
+    case CIDSET_KOREA1:
+      return true;
+
+    default:
+      return false;
+  }
+}
+
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
+FX_DWORD EmbeddedCharcodeFromUnicode(const FXCMAP_CMap* pEmbedMap,
+                                     CIDSet charset,
+                                     FX_WCHAR unicode) {
+  if (!IsValidEmbeddedCharcodeFromUnicodeCharset(charset))
+    return 0;
+
+  CPDF_FontGlobals* pFontGlobals =
+      CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals();
+  const FX_WORD* pCodes = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap;
+  if (!pCodes)
+    return 0;
+
+  int nCodes = pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count;
+  for (int i = 0; i < nCodes; ++i) {
+    if (pCodes[i] == unicode) {
+      FX_DWORD CharCode = FPDFAPI_CharCodeFromCID(pEmbedMap, i);
+      if (CharCode != 0) {
+        return CharCode;
+      }
+    }
+  }
+  return 0;
+}
+#endif  // _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
+
+FX_WCHAR EmbeddedUnicodeFromCharcode(const FXCMAP_CMap* pEmbedMap,
+                                     CIDSet charset,
+                                     FX_DWORD charcode) {
+  if (!IsValidEmbeddedCharcodeFromUnicodeCharset(charset))
+    return 0;
+
+  FX_WORD cid = FPDFAPI_CIDFromCharCode(pEmbedMap, charcode);
+  if (cid == 0)
+    return 0;
+
+  CPDF_FontGlobals* pFontGlobals =
+      CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals();
+  const FX_WORD* pCodes = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap;
+  if (!pCodes)
+    return 0;
+
+  if (cid < pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count)
+    return pCodes[cid];
+  return 0;
+}
+
+void FT_UseCIDCharmap(FXFT_Face face, int coding) {
+  int encoding;
+  switch (coding) {
+    case CIDCODING_GB:
+      encoding = FXFT_ENCODING_GB2312;
+      break;
+    case CIDCODING_BIG5:
+      encoding = FXFT_ENCODING_BIG5;
+      break;
+    case CIDCODING_JIS:
+      encoding = FXFT_ENCODING_SJIS;
+      break;
+    case CIDCODING_KOREA:
+      encoding = FXFT_ENCODING_JOHAB;
+      break;
+    default:
+      encoding = FXFT_ENCODING_UNICODE;
+  }
+  int err = FXFT_Select_Charmap(face, encoding);
+  if (err) {
+    err = FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE);
+  }
+  if (err && FXFT_Get_Face_Charmaps(face)) {
+    FXFT_Set_Charmap(face, *FXFT_Get_Face_Charmaps(face));
+  }
+}
+
+const struct CIDTransform {
+  FX_WORD CID;
+  uint8_t a, b, c, d, e, f;
+} g_Japan1_VertCIDs[] = {
+    {97, 129, 0, 0, 127, 55, 0},
+    {7887, 127, 0, 0, 127, 76, 89},
+    {7888, 127, 0, 0, 127, 79, 94},
+    {7889, 0, 129, 127, 0, 17, 127},
+    {7890, 0, 129, 127, 0, 17, 127},
+    {7891, 0, 129, 127, 0, 17, 127},
+    {7892, 0, 129, 127, 0, 17, 127},
+    {7893, 0, 129, 127, 0, 17, 127},
+    {7894, 0, 129, 127, 0, 17, 127},
+    {7895, 0, 129, 127, 0, 17, 127},
+    {7896, 0, 129, 127, 0, 17, 127},
+    {7897, 0, 129, 127, 0, 17, 127},
+    {7898, 0, 129, 127, 0, 17, 127},
+    {7899, 0, 129, 127, 0, 17, 104},
+    {7900, 0, 129, 127, 0, 17, 127},
+    {7901, 0, 129, 127, 0, 17, 104},
+    {7902, 0, 129, 127, 0, 17, 127},
+    {7903, 0, 129, 127, 0, 17, 127},
+    {7904, 0, 129, 127, 0, 17, 127},
+    {7905, 0, 129, 127, 0, 17, 114},
+    {7906, 0, 129, 127, 0, 17, 127},
+    {7907, 0, 129, 127, 0, 17, 127},
+    {7908, 0, 129, 127, 0, 17, 127},
+    {7909, 0, 129, 127, 0, 17, 127},
+    {7910, 0, 129, 127, 0, 17, 127},
+    {7911, 0, 129, 127, 0, 17, 127},
+    {7912, 0, 129, 127, 0, 17, 127},
+    {7913, 0, 129, 127, 0, 17, 127},
+    {7914, 0, 129, 127, 0, 17, 127},
+    {7915, 0, 129, 127, 0, 17, 114},
+    {7916, 0, 129, 127, 0, 17, 127},
+    {7917, 0, 129, 127, 0, 17, 127},
+    {7918, 127, 0, 0, 127, 18, 25},
+    {7919, 127, 0, 0, 127, 18, 25},
+    {7920, 127, 0, 0, 127, 18, 25},
+    {7921, 127, 0, 0, 127, 18, 25},
+    {7922, 127, 0, 0, 127, 18, 25},
+    {7923, 127, 0, 0, 127, 18, 25},
+    {7924, 127, 0, 0, 127, 18, 25},
+    {7925, 127, 0, 0, 127, 18, 25},
+    {7926, 127, 0, 0, 127, 18, 25},
+    {7927, 127, 0, 0, 127, 18, 25},
+    {7928, 127, 0, 0, 127, 18, 25},
+    {7929, 127, 0, 0, 127, 18, 25},
+    {7930, 127, 0, 0, 127, 18, 25},
+    {7931, 127, 0, 0, 127, 18, 25},
+    {7932, 127, 0, 0, 127, 18, 25},
+    {7933, 127, 0, 0, 127, 18, 25},
+    {7934, 127, 0, 0, 127, 18, 25},
+    {7935, 127, 0, 0, 127, 18, 25},
+    {7936, 127, 0, 0, 127, 18, 25},
+    {7937, 127, 0, 0, 127, 18, 25},
+    {7938, 127, 0, 0, 127, 18, 25},
+    {7939, 127, 0, 0, 127, 18, 25},
+    {8720, 0, 129, 127, 0, 19, 102},
+    {8721, 0, 129, 127, 0, 13, 127},
+    {8722, 0, 129, 127, 0, 19, 108},
+    {8723, 0, 129, 127, 0, 19, 102},
+    {8724, 0, 129, 127, 0, 19, 102},
+    {8725, 0, 129, 127, 0, 19, 102},
+    {8726, 0, 129, 127, 0, 19, 102},
+    {8727, 0, 129, 127, 0, 19, 102},
+    {8728, 0, 129, 127, 0, 19, 114},
+    {8729, 0, 129, 127, 0, 19, 114},
+    {8730, 0, 129, 127, 0, 38, 108},
+    {8731, 0, 129, 127, 0, 13, 108},
+    {8732, 0, 129, 127, 0, 19, 108},
+    {8733, 0, 129, 127, 0, 19, 108},
+    {8734, 0, 129, 127, 0, 19, 108},
+    {8735, 0, 129, 127, 0, 19, 108},
+    {8736, 0, 129, 127, 0, 19, 102},
+    {8737, 0, 129, 127, 0, 19, 102},
+    {8738, 0, 129, 127, 0, 19, 102},
+    {8739, 0, 129, 127, 0, 19, 102},
+    {8740, 0, 129, 127, 0, 19, 102},
+    {8741, 0, 129, 127, 0, 19, 102},
+    {8742, 0, 129, 127, 0, 19, 102},
+    {8743, 0, 129, 127, 0, 19, 102},
+    {8744, 0, 129, 127, 0, 19, 102},
+    {8745, 0, 129, 127, 0, 19, 102},
+    {8746, 0, 129, 127, 0, 19, 114},
+    {8747, 0, 129, 127, 0, 19, 114},
+    {8748, 0, 129, 127, 0, 19, 102},
+    {8749, 0, 129, 127, 0, 19, 102},
+    {8750, 0, 129, 127, 0, 19, 102},
+    {8751, 0, 129, 127, 0, 19, 102},
+    {8752, 0, 129, 127, 0, 19, 102},
+    {8753, 0, 129, 127, 0, 19, 102},
+    {8754, 0, 129, 127, 0, 19, 102},
+    {8755, 0, 129, 127, 0, 19, 102},
+    {8756, 0, 129, 127, 0, 19, 102},
+    {8757, 0, 129, 127, 0, 19, 102},
+    {8758, 0, 129, 127, 0, 19, 102},
+    {8759, 0, 129, 127, 0, 19, 102},
+    {8760, 0, 129, 127, 0, 19, 102},
+    {8761, 0, 129, 127, 0, 19, 102},
+    {8762, 0, 129, 127, 0, 19, 102},
+    {8763, 0, 129, 127, 0, 19, 102},
+    {8764, 0, 129, 127, 0, 19, 102},
+    {8765, 0, 129, 127, 0, 19, 102},
+    {8766, 0, 129, 127, 0, 19, 102},
+    {8767, 0, 129, 127, 0, 19, 102},
+    {8768, 0, 129, 127, 0, 19, 102},
+    {8769, 0, 129, 127, 0, 19, 102},
+    {8770, 0, 129, 127, 0, 19, 102},
+    {8771, 0, 129, 127, 0, 19, 102},
+    {8772, 0, 129, 127, 0, 19, 102},
+    {8773, 0, 129, 127, 0, 19, 102},
+    {8774, 0, 129, 127, 0, 19, 102},
+    {8775, 0, 129, 127, 0, 19, 102},
+    {8776, 0, 129, 127, 0, 19, 102},
+    {8777, 0, 129, 127, 0, 19, 102},
+    {8778, 0, 129, 127, 0, 19, 102},
+    {8779, 0, 129, 127, 0, 19, 114},
+    {8780, 0, 129, 127, 0, 19, 108},
+    {8781, 0, 129, 127, 0, 19, 114},
+    {8782, 0, 129, 127, 0, 13, 114},
+    {8783, 0, 129, 127, 0, 19, 108},
+    {8784, 0, 129, 127, 0, 13, 114},
+    {8785, 0, 129, 127, 0, 19, 108},
+    {8786, 0, 129, 127, 0, 19, 108},
+    {8787, 0, 129, 127, 0, 19, 108},
+    {8788, 0, 129, 127, 0, 19, 108},
+    {8789, 0, 129, 127, 0, 19, 108},
+    {8790, 0, 129, 127, 0, 19, 108},
+    {8791, 0, 129, 127, 0, 19, 108},
+    {8792, 0, 129, 127, 0, 19, 108},
+    {8793, 0, 129, 127, 0, 19, 108},
+    {8794, 0, 129, 127, 0, 19, 108},
+    {8795, 0, 129, 127, 0, 19, 108},
+    {8796, 0, 129, 127, 0, 19, 108},
+    {8797, 0, 129, 127, 0, 19, 108},
+    {8798, 0, 129, 127, 0, 19, 108},
+    {8799, 0, 129, 127, 0, 19, 108},
+    {8800, 0, 129, 127, 0, 19, 108},
+    {8801, 0, 129, 127, 0, 19, 108},
+    {8802, 0, 129, 127, 0, 19, 108},
+    {8803, 0, 129, 127, 0, 19, 108},
+    {8804, 0, 129, 127, 0, 19, 108},
+    {8805, 0, 129, 127, 0, 19, 108},
+    {8806, 0, 129, 127, 0, 19, 108},
+    {8807, 0, 129, 127, 0, 19, 108},
+    {8808, 0, 129, 127, 0, 19, 108},
+    {8809, 0, 129, 127, 0, 19, 108},
+    {8810, 0, 129, 127, 0, 19, 108},
+    {8811, 0, 129, 127, 0, 19, 114},
+    {8812, 0, 129, 127, 0, 19, 102},
+    {8813, 0, 129, 127, 0, 19, 114},
+    {8814, 0, 129, 127, 0, 76, 102},
+    {8815, 0, 129, 127, 0, 13, 121},
+    {8816, 0, 129, 127, 0, 19, 114},
+    {8817, 0, 129, 127, 0, 19, 127},
+    {8818, 0, 129, 127, 0, 19, 114},
+    {8819, 0, 129, 127, 0, 218, 108},
+};
+
+}  // namespace
+
 CPDF_CMapManager::CPDF_CMapManager() {
   m_bPrompted = FALSE;
   FXSYS_memset(m_CID2UnicodeMaps, 0, sizeof m_CID2UnicodeMaps);
@@ -21,7 +599,7 @@ CPDF_CMapManager::~CPDF_CMapManager() {
     delete pair.second;
   }
   m_CMaps.clear();
-  for (int i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
+  for (size_t i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
     delete m_CID2UnicodeMaps[i];
   }
 }
@@ -47,36 +625,25 @@ CPDF_CMap* CPDF_CMapManager::LoadPredefinedCMap(const CFX_ByteString& name,
   pCMap->LoadPredefined(this, pname, bPromptCJK);
   return pCMap;
 }
-static const FX_CHAR* const g_CharsetNames[NUMBER_OF_CIDSETS] = {
-    NULL, "GB1", "CNS1", "Japan1", "Korea1", "UCS"};
-static const int g_CharsetCPs[NUMBER_OF_CIDSETS] = {0,   936, 950,
-                                                    932, 949, 1200};
-int _CharsetFromOrdering(const CFX_ByteString& Ordering) {
-  for (int charset = 1; charset < NUMBER_OF_CIDSETS; charset++) {
-    if (Ordering == CFX_ByteStringC(g_CharsetNames[charset]))
-      return charset;
-  }
-  return CIDSET_UNKNOWN;
-}
+
 void CPDF_CMapManager::ReloadAll() {
   for (const auto& pair : m_CMaps) {
     CPDF_CMap* pCMap = pair.second;
     pCMap->LoadPredefined(this, pair.first, FALSE);
   }
-  for (int i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
+  for (size_t i = 0; i < FX_ArraySize(m_CID2UnicodeMaps); ++i) {
     if (CPDF_CID2UnicodeMap* pMap = m_CID2UnicodeMaps[i]) {
-      pMap->Load(this, i, FALSE);
+      pMap->Load(this, CIDSetFromSizeT(i), FALSE);
     }
   }
 }
-CPDF_CID2UnicodeMap* CPDF_CMapManager::GetCID2UnicodeMap(int charset,
+CPDF_CID2UnicodeMap* CPDF_CMapManager::GetCID2UnicodeMap(CIDSet charset,
                                                          FX_BOOL bPromptCJK) {
-  if (m_CID2UnicodeMaps[charset] == NULL) {
+  if (!m_CID2UnicodeMaps[charset])
     m_CID2UnicodeMaps[charset] = LoadCID2UnicodeMap(charset, bPromptCJK);
-  }
   return m_CID2UnicodeMaps[charset];
 }
-CPDF_CID2UnicodeMap* CPDF_CMapManager::LoadCID2UnicodeMap(int charset,
+CPDF_CID2UnicodeMap* CPDF_CMapManager::LoadCID2UnicodeMap(CIDSet charset,
                                                           FX_BOOL bPromptCJK) {
   CPDF_CID2UnicodeMap* pMap = new CPDF_CID2UnicodeMap();
   if (!pMap->Initialize()) {
@@ -98,77 +665,7 @@ FX_BOOL CPDF_CMapParser::Initialize(CPDF_CMap* pCMap) {
   m_AddMaps.EstimateSize(0, 10240);
   return TRUE;
 }
-static FX_DWORD CMap_GetCode(const CFX_ByteStringC& word) {
-  int num = 0;
-  if (word.GetAt(0) == '<') {
-    for (int i = 1; i < word.GetLength(); i++) {
-      uint8_t digit = word.GetAt(i);
-      if (digit >= '0' && digit <= '9') {
-        digit = digit - '0';
-      } else if (digit >= 'a' && digit <= 'f') {
-        digit = digit - 'a' + 10;
-      } else if (digit >= 'A' && digit <= 'F') {
-        digit = digit - 'A' + 10;
-      } else {
-        return num;
-      }
-      num = num * 16 + digit;
-    }
-  } else {
-    for (int i = 0; i < word.GetLength(); i++) {
-      if (word.GetAt(i) < '0' || word.GetAt(i) > '9') {
-        return num;
-      }
-      num = num * 10 + word.GetAt(i) - '0';
-    }
-  }
-  return num;
-}
-static FX_BOOL _CMap_GetCodeRange(_CMap_CodeRange& range,
-                                  const CFX_ByteStringC& first,
-                                  const CFX_ByteStringC& second) {
-  if (first.GetLength() == 0 || first.GetAt(0) != '<') {
-    return FALSE;
-  }
-  int i;
-  for (i = 1; i < first.GetLength(); i++)
-    if (first.GetAt(i) == '>') {
-      break;
-    }
-  range.m_CharSize = (i - 1) / 2;
-  if (range.m_CharSize > 4) {
-    return FALSE;
-  }
-  for (i = 0; i < range.m_CharSize; i++) {
-    uint8_t digit1 = first.GetAt(i * 2 + 1);
-    uint8_t digit2 = first.GetAt(i * 2 + 2);
-    uint8_t byte = (digit1 >= '0' && digit1 <= '9')
-                       ? (digit1 - '0')
-                       : ((digit1 & 0xdf) - 'A' + 10);
-    byte = byte * 16 + ((digit2 >= '0' && digit2 <= '9')
-                            ? (digit2 - '0')
-                            : ((digit2 & 0xdf) - 'A' + 10));
-    range.m_Lower[i] = byte;
-  }
-  FX_DWORD size = second.GetLength();
-  for (i = 0; i < range.m_CharSize; i++) {
-    uint8_t digit1 =
-        ((FX_DWORD)i * 2 + 1 < size) ? second.GetAt((FX_STRSIZE)i * 2 + 1) : 0;
-    uint8_t digit2 =
-        ((FX_DWORD)i * 2 + 2 < size) ? second.GetAt((FX_STRSIZE)i * 2 + 2) : 0;
-    uint8_t byte = (digit1 >= '0' && digit1 <= '9')
-                       ? (digit1 - '0')
-                       : ((digit1 & 0xdf) - 'A' + 10);
-    byte = byte * 16 + ((digit2 >= '0' && digit2 <= '9')
-                            ? (digit2 - '0')
-                            : ((digit2 & 0xdf) - 'A' + 10));
-    range.m_Upper[i] = byte;
-  }
-  return TRUE;
-}
-static CFX_ByteString CMap_GetString(const CFX_ByteStringC& word) {
-  return word.Mid(1, word.GetLength() - 2);
-}
+
 void CPDF_CMapParser::ParseWord(const CFX_ByteStringC& word) {
   if (word.IsEmpty()) {
     return;
@@ -228,7 +725,7 @@ void CPDF_CMapParser::ParseWord(const CFX_ByteStringC& word) {
     CMap_GetString(word);
     m_Status = 0;
   } else if (m_Status == 4) {
-    m_pCMap->m_Charset = _CharsetFromOrdering(CMap_GetString(word));
+    m_pCMap->m_Charset = CharsetFromOrdering(CMap_GetString(word));
     m_Status = 0;
   } else if (m_Status == 5) {
     CMap_GetCode(word);
@@ -243,9 +740,9 @@ void CPDF_CMapParser::ParseWord(const CFX_ByteStringC& word) {
         m_pCMap->m_CodingScheme = CPDF_CMap::MixedFourBytes;
         m_pCMap->m_nCodeRanges = nSegs;
         m_pCMap->m_pLeadingBytes =
-            FX_Alloc2D(uint8_t, nSegs, sizeof(_CMap_CodeRange));
+            FX_Alloc2D(uint8_t, nSegs, sizeof(CMap_CodeRange));
         FXSYS_memcpy(m_pCMap->m_pLeadingBytes, m_CodeRanges.GetData(),
-                     nSegs * sizeof(_CMap_CodeRange));
+                     nSegs * sizeof(CMap_CodeRange));
       } else if (nSegs == 1) {
         m_pCMap->m_CodingScheme = (m_CodeRanges[0].m_CharSize == 2)
                                       ? CPDF_CMap::TwoBytes
@@ -257,8 +754,8 @@ void CPDF_CMapParser::ParseWord(const CFX_ByteStringC& word) {
         return;
       }
       if (m_CodeSeq % 2) {
-        _CMap_CodeRange range;
-        if (_CMap_GetCodeRange(range, m_LastWord, word)) {
+        CMap_CodeRange range;
+        if (CMap_GetCodeRange(range, m_LastWord, word)) {
           m_CodeRanges.Add(range);
         }
       }
@@ -291,145 +788,6 @@ void CPDF_CMap::Release() {
     delete this;
   }
 }
-const CPDF_PredefinedCMap g_PredefinedCMaps[] = {
-    {"GB-EUC",
-     CIDSET_GB1,
-     CIDCODING_GB,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0xa1, 0xfe}},
-    {"GBpc-EUC",
-     CIDSET_GB1,
-     CIDCODING_GB,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0xa1, 0xfc}},
-    {"GBK-EUC",
-     CIDSET_GB1,
-     CIDCODING_GB,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0x81, 0xfe}},
-    {"GBKp-EUC",
-     CIDSET_GB1,
-     CIDCODING_GB,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0x81, 0xfe}},
-    {"GBK2K-EUC",
-     CIDSET_GB1,
-     CIDCODING_GB,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0x81, 0xfe}},
-    {"GBK2K",
-     CIDSET_GB1,
-     CIDCODING_GB,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0x81, 0xfe}},
-    {"UniGB-UCS2", CIDSET_GB1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
-    {"UniGB-UTF16", CIDSET_GB1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
-    {"B5pc",
-     CIDSET_CNS1,
-     CIDCODING_BIG5,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0xa1, 0xfc}},
-    {"HKscs-B5",
-     CIDSET_CNS1,
-     CIDCODING_BIG5,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0x88, 0xfe}},
-    {"ETen-B5",
-     CIDSET_CNS1,
-     CIDCODING_BIG5,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0xa1, 0xfe}},
-    {"ETenms-B5",
-     CIDSET_CNS1,
-     CIDCODING_BIG5,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0xa1, 0xfe}},
-    {"UniCNS-UCS2", CIDSET_CNS1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
-    {"UniCNS-UTF16", CIDSET_CNS1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
-    {"83pv-RKSJ",
-     CIDSET_JAPAN1,
-     CIDCODING_JIS,
-     CPDF_CMap::MixedTwoBytes,
-     2,
-     {0x81, 0x9f, 0xe0, 0xfc}},
-    {"90ms-RKSJ",
-     CIDSET_JAPAN1,
-     CIDCODING_JIS,
-     CPDF_CMap::MixedTwoBytes,
-     2,
-     {0x81, 0x9f, 0xe0, 0xfc}},
-    {"90msp-RKSJ",
-     CIDSET_JAPAN1,
-     CIDCODING_JIS,
-     CPDF_CMap::MixedTwoBytes,
-     2,
-     {0x81, 0x9f, 0xe0, 0xfc}},
-    {"90pv-RKSJ",
-     CIDSET_JAPAN1,
-     CIDCODING_JIS,
-     CPDF_CMap::MixedTwoBytes,
-     2,
-     {0x81, 0x9f, 0xe0, 0xfc}},
-    {"Add-RKSJ",
-     CIDSET_JAPAN1,
-     CIDCODING_JIS,
-     CPDF_CMap::MixedTwoBytes,
-     2,
-     {0x81, 0x9f, 0xe0, 0xfc}},
-    {"EUC",
-     CIDSET_JAPAN1,
-     CIDCODING_JIS,
-     CPDF_CMap::MixedTwoBytes,
-     2,
-     {0x8e, 0x8e, 0xa1, 0xfe}},
-    {"H", CIDSET_JAPAN1, CIDCODING_JIS, CPDF_CMap::TwoBytes, 1, {0x21, 0x7e}},
-    {"V", CIDSET_JAPAN1, CIDCODING_JIS, CPDF_CMap::TwoBytes, 1, {0x21, 0x7e}},
-    {"Ext-RKSJ",
-     CIDSET_JAPAN1,
-     CIDCODING_JIS,
-     CPDF_CMap::MixedTwoBytes,
-     2,
-     {0x81, 0x9f, 0xe0, 0xfc}},
-    {"UniJIS-UCS2", CIDSET_JAPAN1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
-    {"UniJIS-UCS2-HW", CIDSET_JAPAN1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
-    {"UniJIS-UTF16", CIDSET_JAPAN1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
-    {"KSC-EUC",
-     CIDSET_KOREA1,
-     CIDCODING_KOREA,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0xa1, 0xfe}},
-    {"KSCms-UHC",
-     CIDSET_KOREA1,
-     CIDCODING_KOREA,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0x81, 0xfe}},
-    {"KSCms-UHC-HW",
-     CIDSET_KOREA1,
-     CIDCODING_KOREA,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0x81, 0xfe}},
-    {"KSCpc-EUC",
-     CIDSET_KOREA1,
-     CIDCODING_KOREA,
-     CPDF_CMap::MixedTwoBytes,
-     1,
-     {0xa1, 0xfd}},
-    {"UniKS-UCS2", CIDSET_KOREA1, CIDCODING_UCS2, CPDF_CMap::TwoBytes},
-    {"UniKS-UTF16", CIDSET_KOREA1, CIDCODING_UTF16, CPDF_CMap::TwoBytes},
-    {NULL, 0, 0}};
 
 FX_BOOL CPDF_CMap::LoadPredefined(CPDF_CMapManager* pMgr,
                                   const FX_CHAR* pName,
@@ -447,25 +805,24 @@ FX_BOOL CPDF_CMap::LoadPredefined(CPDF_CMapManager* pMgr,
   if (cmapid.GetLength() > 2) {
     cmapid = cmapid.Left(cmapid.GetLength() - 2);
   }
-  int index = 0;
-  while (1) {
-    if (g_PredefinedCMaps[index].m_pName == NULL) {
-      return FALSE;
-    }
-    if (cmapid == CFX_ByteStringC(g_PredefinedCMaps[index].m_pName)) {
+  const CPDF_PredefinedCMap* map = nullptr;
+  for (size_t i = 0; i < FX_ArraySize(g_PredefinedCMaps); ++i) {
+    if (cmapid == CFX_ByteStringC(g_PredefinedCMaps[i].m_pName)) {
+      map = &g_PredefinedCMaps[i];
       break;
     }
-    index++;
   }
-  const CPDF_PredefinedCMap& map = g_PredefinedCMaps[index];
-  m_Charset = map.m_Charset;
-  m_Coding = map.m_Coding;
-  m_CodingScheme = map.m_CodingScheme;
+  if (!map)
+    return FALSE;
+
+  m_Charset = map->m_Charset;
+  m_Coding = map->m_Coding;
+  m_CodingScheme = map->m_CodingScheme;
   if (m_CodingScheme == MixedTwoBytes) {
     m_pLeadingBytes = FX_Alloc(uint8_t, 256);
-    for (FX_DWORD i = 0; i < map.m_LeadingSegCount; i++) {
-      for (int b = map.m_LeadingSegs[i * 2]; b <= map.m_LeadingSegs[i * 2 + 1];
-           b++) {
+    for (FX_DWORD i = 0; i < map->m_LeadingSegCount; ++i) {
+      const uint8_t* segs = map->m_LeadingSegs;
+      for (int b = segs[i * 2]; b <= segs[i * 2 + 1]; ++b) {
         m_pLeadingBytes[b] = 1;
       }
     }
@@ -477,11 +834,6 @@ FX_BOOL CPDF_CMap::LoadPredefined(CPDF_CMapManager* pMgr,
   }
   return FALSE;
 }
-extern "C" {
-static int compare_dword(const void* data1, const void* data2) {
-  return (*(FX_DWORD*)data1) - (*(FX_DWORD*)data2);
-}
-};
 FX_BOOL CPDF_CMap::LoadEmbedded(const uint8_t* pData, FX_DWORD size) {
   m_pMapping = FX_Alloc(FX_WORD, 65536);
   CPDF_CMapParser parser;
@@ -500,22 +852,11 @@ FX_BOOL CPDF_CMap::LoadEmbedded(const uint8_t* pData, FX_DWORD size) {
     FXSYS_memcpy(m_pAddMapping + 4, parser.m_AddMaps.GetBuffer(),
                  parser.m_AddMaps.GetSize());
     FXSYS_qsort(m_pAddMapping + 4, parser.m_AddMaps.GetSize() / 8, 8,
-                compare_dword);
+                CompareDWORD);
   }
   return TRUE;
 }
-extern "C" {
-static int compareCID(const void* key, const void* element) {
-  if ((*(FX_DWORD*)key) < (*(FX_DWORD*)element)) {
-    return -1;
-  }
-  if ((*(FX_DWORD*)key) >
-      (*(FX_DWORD*)element) + ((FX_DWORD*)element)[1] / 65536) {
-    return 1;
-  }
-  return 0;
-}
-};
+
 FX_WORD CPDF_CMap::CIDFromCharCode(FX_DWORD charcode) const {
   if (m_Coding == CIDCODING_CID) {
     return (FX_WORD)charcode;
@@ -529,7 +870,7 @@ FX_WORD CPDF_CMap::CIDFromCharCode(FX_DWORD charcode) const {
   if (charcode >> 16) {
     if (m_pAddMapping) {
       void* found = FXSYS_bsearch(&charcode, m_pAddMapping + 4,
-                                  *(FX_DWORD*)m_pAddMapping, 8, compareCID);
+                                  *(FX_DWORD*)m_pAddMapping, 8, CompareCID);
       if (found == NULL) {
         if (m_pUseMap) {
           return m_pUseMap->CIDFromCharCode(charcode);
@@ -539,48 +880,16 @@ FX_WORD CPDF_CMap::CIDFromCharCode(FX_DWORD charcode) const {
       return (FX_WORD)(((FX_DWORD*)found)[1] % 65536 + charcode -
                        *(FX_DWORD*)found);
     }
-    if (m_pUseMap) {
+    if (m_pUseMap)
       return m_pUseMap->CIDFromCharCode(charcode);
-    }
     return 0;
   }
   FX_DWORD CID = m_pMapping[charcode];
-  if (!CID && m_pUseMap) {
+  if (!CID && m_pUseMap)
     return m_pUseMap->CIDFromCharCode(charcode);
-  }
   return (FX_WORD)CID;
 }
-static int _CheckCodeRange(uint8_t* codes,
-                           int size,
-                           _CMap_CodeRange* pRanges,
-                           int nRanges) {
-  int iSeg = nRanges - 1;
-  while (iSeg >= 0) {
-    if (pRanges[iSeg].m_CharSize < size) {
-      iSeg--;
-      continue;
-    }
-    int iChar = 0;
-    while (iChar < size) {
-      if (codes[iChar] < pRanges[iSeg].m_Lower[iChar] ||
-          codes[iChar] > pRanges[iSeg].m_Upper[iChar]) {
-        break;
-      }
-      iChar++;
-    }
-    if (iChar == pRanges[iSeg].m_CharSize) {
-      return 2;
-    }
-    if (iChar) {
-      if (size == pRanges[iSeg].m_CharSize) {
-        return 2;
-      }
-      return 1;
-    }
-    iSeg--;
-  }
-  return 0;
-}
+
 FX_DWORD CPDF_CMap::GetNextChar(const FX_CHAR* pString,
                                 int nStrLen,
                                 int& offset) const {
@@ -603,9 +912,9 @@ FX_DWORD CPDF_CMap::GetNextChar(const FX_CHAR* pString,
       uint8_t codes[4];
       int char_size = 1;
       codes[0] = ((uint8_t*)pString)[offset++];
-      _CMap_CodeRange* pRanges = (_CMap_CodeRange*)m_pLeadingBytes;
+      CMap_CodeRange* pRanges = (CMap_CodeRange*)m_pLeadingBytes;
       while (1) {
-        int ret = _CheckCodeRange(codes, char_size, pRanges, m_nCodeRanges);
+        int ret = CheckCodeRange(codes, char_size, pRanges, m_nCodeRanges);
         if (ret == 0) {
           return 0;
         }
@@ -674,40 +983,7 @@ int CPDF_CMap::CountChar(const FX_CHAR* pString, int size) const {
   }
   return size;
 }
-int _GetCharSize(FX_DWORD charcode, _CMap_CodeRange* pRanges, int iRangesSize) {
-  if (!iRangesSize) {
-    return 1;
-  }
-  uint8_t codes[4];
-  codes[0] = codes[1] = 0x00;
-  codes[2] = (uint8_t)(charcode >> 8 & 0xFF);
-  codes[3] = (uint8_t)charcode;
-  int offset = 0, size = 4;
-  for (int i = 0; i < 4; ++i) {
-    int iSeg = iRangesSize - 1;
-    while (iSeg >= 0) {
-      if (pRanges[iSeg].m_CharSize < size) {
-        iSeg--;
-        continue;
-      }
-      int iChar = 0;
-      while (iChar < size) {
-        if (codes[offset + iChar] < pRanges[iSeg].m_Lower[iChar] ||
-            codes[offset + iChar] > pRanges[iSeg].m_Upper[iChar]) {
-          break;
-        }
-        iChar++;
-      }
-      if (iChar == pRanges[iSeg].m_CharSize) {
-        return size;
-      }
-      iSeg--;
-    }
-    size--;
-    offset++;
-  }
-  return 1;
-}
+
 int CPDF_CMap::AppendChar(FX_CHAR* str, FX_DWORD charcode) const {
   switch (m_CodingScheme) {
     case OneByte:
@@ -720,8 +996,8 @@ int CPDF_CMap::AppendChar(FX_CHAR* str, FX_DWORD charcode) const {
     case MixedTwoBytes:
     case MixedFourBytes:
       if (charcode < 0x100) {
-        _CMap_CodeRange* pRanges = (_CMap_CodeRange*)m_pLeadingBytes;
-        int iSize = _GetCharSize(charcode, pRanges, m_nCodeRanges);
+        CMap_CodeRange* pRanges = (CMap_CodeRange*)m_pLeadingBytes;
+        int iSize = GetCharSizeImpl(charcode, pRanges, m_nCodeRanges);
         if (iSize == 0) {
           iSize = 1;
         }
@@ -769,15 +1045,14 @@ FX_WCHAR CPDF_CID2UnicodeMap::UnicodeFromCID(FX_WORD CID) {
   }
   return 0;
 }
-void FPDFAPI_LoadCID2UnicodeMap(int charset,
-                                const FX_WORD*& pMap,
-                                FX_DWORD& count);
+
 void CPDF_CID2UnicodeMap::Load(CPDF_CMapManager* pMgr,
-                               int charset,
+                               CIDSet charset,
                                FX_BOOL bPromptCJK) {
   m_Charset = charset;
   FPDFAPI_LoadCID2UnicodeMap(charset, m_pEmbeddedMap, m_EmbeddedCount);
 }
+
 #include "ttgsubtable.h"
 CPDF_CIDFont::CPDF_CIDFont() : CPDF_Font(PDFFONT_CIDFONT) {
   m_pCMap = NULL;
@@ -807,51 +1082,7 @@ FX_WORD CPDF_CIDFont::CIDFromCharCode(FX_DWORD charcode) const {
 FX_BOOL CPDF_CIDFont::IsVertWriting() const {
   return m_pCMap ? m_pCMap->IsVertWriting() : FALSE;
 }
-static FX_DWORD _EmbeddedCharcodeFromUnicode(const FXCMAP_CMap* pEmbedMap,
-                                             int charset,
-                                             FX_WCHAR unicode) {
-  if (charset <= 0 || charset > 4) {
-    return 0;
-  }
-  CPDF_FontGlobals* pFontGlobals =
-      CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals();
-  const FX_WORD* pCodes = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap;
-  if (pCodes == NULL) {
-    return 0;
-  }
-  int nCodes = pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count;
-  for (int i = 0; i < nCodes; i++) {
-    if (pCodes[i] == unicode) {
-      FX_DWORD CharCode = FPDFAPI_CharCodeFromCID(pEmbedMap, i);
-      if (CharCode == 0) {
-        continue;
-      }
-      return CharCode;
-    }
-  }
-  return 0;
-}
-static FX_WCHAR _EmbeddedUnicodeFromCharcode(const FXCMAP_CMap* pEmbedMap,
-                                             int charset,
-                                             FX_DWORD charcode) {
-  if (charset <= 0 || charset > 4) {
-    return 0;
-  }
-  FX_WORD cid = FPDFAPI_CIDFromCharCode(pEmbedMap, charcode);
-  if (cid == 0) {
-    return 0;
-  }
-  CPDF_FontGlobals* pFontGlobals =
-      CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals();
-  const FX_WORD* pCodes = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap;
-  if (pCodes == NULL) {
-    return 0;
-  }
-  if (cid < pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count) {
-    return pCodes[cid];
-  }
-  return 0;
-}
+
 FX_WCHAR CPDF_CIDFont::_UnicodeFromCharCode(FX_DWORD charcode) const {
   switch (m_pCMap->m_Coding) {
     case CIDCODING_UCS2:
@@ -881,8 +1112,8 @@ FX_WCHAR CPDF_CIDFont::_UnicodeFromCharCode(FX_DWORD charcode) const {
     return unicode;
 #endif
     if (m_pCMap->m_pEmbedMap) {
-      return _EmbeddedUnicodeFromCharcode(m_pCMap->m_pEmbedMap,
-                                          m_pCMap->m_Charset, charcode);
+      return EmbeddedUnicodeFromCharcode(m_pCMap->m_pEmbedMap,
+                                         m_pCMap->m_Charset, charcode);
     }
     return 0;
   }
@@ -930,38 +1161,13 @@ FX_DWORD CPDF_CIDFont::_CharCodeFromUnicode(FX_WCHAR unicode) const {
   }
 #else
   if (m_pCMap->m_pEmbedMap) {
-    return _EmbeddedCharcodeFromUnicode(m_pCMap->m_pEmbedMap,
-                                        m_pCMap->m_Charset, unicode);
+    return EmbeddedCharcodeFromUnicode(m_pCMap->m_pEmbedMap, m_pCMap->m_Charset,
+                                       unicode);
   }
 #endif
   return 0;
 }
-static void FT_UseCIDCharmap(FXFT_Face face, int coding) {
-  int encoding;
-  switch (coding) {
-    case CIDCODING_GB:
-      encoding = FXFT_ENCODING_GB2312;
-      break;
-    case CIDCODING_BIG5:
-      encoding = FXFT_ENCODING_BIG5;
-      break;
-    case CIDCODING_JIS:
-      encoding = FXFT_ENCODING_SJIS;
-      break;
-    case CIDCODING_KOREA:
-      encoding = FXFT_ENCODING_JOHAB;
-      break;
-    default:
-      encoding = FXFT_ENCODING_UNICODE;
-  }
-  int err = FXFT_Select_Charmap(face, encoding);
-  if (err) {
-    err = FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE);
-  }
-  if (err && FXFT_Get_Face_Charmaps(face)) {
-    FXFT_Set_Charmap(face, *FXFT_Get_Face_Charmaps(face));
-  }
-}
+
 FX_BOOL CPDF_CIDFont::_Load() {
   if (m_pFontDict->GetString(FX_BSTRC("Subtype")) == FX_BSTRC("TrueType")) {
     return LoadGB2312();
@@ -1024,7 +1230,7 @@ FX_BOOL CPDF_CIDFont::_Load() {
         pCIDFontDict->GetDict(FX_BSTRC("CIDSystemInfo"));
     if (pCIDInfo) {
       m_Charset =
-          _CharsetFromOrdering(pCIDInfo->GetString(FX_BSTRC("Ordering")));
+          CharsetFromOrdering(pCIDInfo->GetString(FX_BSTRC("Ordering")));
     }
   }
   if (m_Charset != CIDSET_UNKNOWN)
@@ -1088,12 +1294,7 @@ FX_BOOL CPDF_CIDFont::_Load() {
   }
   return TRUE;
 }
-FX_FLOAT _CIDTransformToFloat(uint8_t ch) {
-  if (ch < 128) {
-    return ch * 1.0f / 127;
-  }
-  return (-255 + ch) * 1.0f / 127;
-}
+
 void CPDF_CIDFont::GetCharBBox(FX_DWORD charcode, FX_RECT& rect, int level) {
   if (charcode < 256 && m_CharBBox[charcode].Right != -1) {
     rect.bottom = m_CharBBox[charcode].Bottom;
@@ -1159,12 +1360,12 @@ void CPDF_CIDFont::GetCharBBox(FX_DWORD charcode, FX_RECT& rect, int level) {
     FX_WORD CID = CIDFromCharCode(charcode);
     const uint8_t* pTransform = GetCIDTransform(CID);
     if (pTransform && !bVert) {
-      CFX_AffineMatrix matrix(_CIDTransformToFloat(pTransform[0]),
-                              _CIDTransformToFloat(pTransform[1]),
-                              _CIDTransformToFloat(pTransform[2]),
-                              _CIDTransformToFloat(pTransform[3]),
-                              _CIDTransformToFloat(pTransform[4]) * 1000,
-                              _CIDTransformToFloat(pTransform[5]) * 1000);
+      CFX_AffineMatrix matrix(CIDTransformToFloat(pTransform[0]),
+                              CIDTransformToFloat(pTransform[1]),
+                              CIDTransformToFloat(pTransform[2]),
+                              CIDTransformToFloat(pTransform[3]),
+                              CIDTransformToFloat(pTransform[4]) * 1000,
+                              CIDTransformToFloat(pTransform[5]) * 1000);
       CFX_FloatRect rect_f(rect);
       rect_f.Transform(&matrix);
       rect = rect_f.GetOutterRect();
@@ -1503,6 +1704,15 @@ void CPDF_CIDFont::LoadMetricsArray(CPDF_Array* pArray,
     }
   }
 }
+
+// static
+FX_FLOAT CPDF_CIDFont::CIDTransformToFloat(uint8_t ch) {
+  if (ch < 128) {
+    return ch * 1.0f / 127;
+  }
+  return (-255 + ch) * 1.0f / 127;
+}
+
 FX_BOOL CPDF_CIDFont::LoadGB2312() {
   m_BaseFont = m_pFontDict->GetString(FX_BSTRC("BaseFont"));
   CPDF_Dictionary* pFontDesc = m_pFontDict->GetDict(FX_BSTRC("FontDescriptor"));
@@ -1530,104 +1740,23 @@ FX_BOOL CPDF_CIDFont::LoadGB2312() {
   }
   return TRUE;
 }
-const struct _CIDTransform {
-  FX_WORD CID;
-  uint8_t a, b, c, d, e, f;
-} Japan1_VertCIDs[] = {
-    {97, 129, 0, 0, 127, 55, 0},     {7887, 127, 0, 0, 127, 76, 89},
-    {7888, 127, 0, 0, 127, 79, 94},  {7889, 0, 129, 127, 0, 17, 127},
-    {7890, 0, 129, 127, 0, 17, 127}, {7891, 0, 129, 127, 0, 17, 127},
-    {7892, 0, 129, 127, 0, 17, 127}, {7893, 0, 129, 127, 0, 17, 127},
-    {7894, 0, 129, 127, 0, 17, 127}, {7895, 0, 129, 127, 0, 17, 127},
-    {7896, 0, 129, 127, 0, 17, 127}, {7897, 0, 129, 127, 0, 17, 127},
-    {7898, 0, 129, 127, 0, 17, 127}, {7899, 0, 129, 127, 0, 17, 104},
-    {7900, 0, 129, 127, 0, 17, 127}, {7901, 0, 129, 127, 0, 17, 104},
-    {7902, 0, 129, 127, 0, 17, 127}, {7903, 0, 129, 127, 0, 17, 127},
-    {7904, 0, 129, 127, 0, 17, 127}, {7905, 0, 129, 127, 0, 17, 114},
-    {7906, 0, 129, 127, 0, 17, 127}, {7907, 0, 129, 127, 0, 17, 127},
-    {7908, 0, 129, 127, 0, 17, 127}, {7909, 0, 129, 127, 0, 17, 127},
-    {7910, 0, 129, 127, 0, 17, 127}, {7911, 0, 129, 127, 0, 17, 127},
-    {7912, 0, 129, 127, 0, 17, 127}, {7913, 0, 129, 127, 0, 17, 127},
-    {7914, 0, 129, 127, 0, 17, 127}, {7915, 0, 129, 127, 0, 17, 114},
-    {7916, 0, 129, 127, 0, 17, 127}, {7917, 0, 129, 127, 0, 17, 127},
-    {7918, 127, 0, 0, 127, 18, 25},  {7919, 127, 0, 0, 127, 18, 25},
-    {7920, 127, 0, 0, 127, 18, 25},  {7921, 127, 0, 0, 127, 18, 25},
-    {7922, 127, 0, 0, 127, 18, 25},  {7923, 127, 0, 0, 127, 18, 25},
-    {7924, 127, 0, 0, 127, 18, 25},  {7925, 127, 0, 0, 127, 18, 25},
-    {7926, 127, 0, 0, 127, 18, 25},  {7927, 127, 0, 0, 127, 18, 25},
-    {7928, 127, 0, 0, 127, 18, 25},  {7929, 127, 0, 0, 127, 18, 25},
-    {7930, 127, 0, 0, 127, 18, 25},  {7931, 127, 0, 0, 127, 18, 25},
-    {7932, 127, 0, 0, 127, 18, 25},  {7933, 127, 0, 0, 127, 18, 25},
-    {7934, 127, 0, 0, 127, 18, 25},  {7935, 127, 0, 0, 127, 18, 25},
-    {7936, 127, 0, 0, 127, 18, 25},  {7937, 127, 0, 0, 127, 18, 25},
-    {7938, 127, 0, 0, 127, 18, 25},  {7939, 127, 0, 0, 127, 18, 25},
-    {8720, 0, 129, 127, 0, 19, 102}, {8721, 0, 129, 127, 0, 13, 127},
-    {8722, 0, 129, 127, 0, 19, 108}, {8723, 0, 129, 127, 0, 19, 102},
-    {8724, 0, 129, 127, 0, 19, 102}, {8725, 0, 129, 127, 0, 19, 102},
-    {8726, 0, 129, 127, 0, 19, 102}, {8727, 0, 129, 127, 0, 19, 102},
-    {8728, 0, 129, 127, 0, 19, 114}, {8729, 0, 129, 127, 0, 19, 114},
-    {8730, 0, 129, 127, 0, 38, 108}, {8731, 0, 129, 127, 0, 13, 108},
-    {8732, 0, 129, 127, 0, 19, 108}, {8733, 0, 129, 127, 0, 19, 108},
-    {8734, 0, 129, 127, 0, 19, 108}, {8735, 0, 129, 127, 0, 19, 108},
-    {8736, 0, 129, 127, 0, 19, 102}, {8737, 0, 129, 127, 0, 19, 102},
-    {8738, 0, 129, 127, 0, 19, 102}, {8739, 0, 129, 127, 0, 19, 102},
-    {8740, 0, 129, 127, 0, 19, 102}, {8741, 0, 129, 127, 0, 19, 102},
-    {8742, 0, 129, 127, 0, 19, 102}, {8743, 0, 129, 127, 0, 19, 102},
-    {8744, 0, 129, 127, 0, 19, 102}, {8745, 0, 129, 127, 0, 19, 102},
-    {8746, 0, 129, 127, 0, 19, 114}, {8747, 0, 129, 127, 0, 19, 114},
-    {8748, 0, 129, 127, 0, 19, 102}, {8749, 0, 129, 127, 0, 19, 102},
-    {8750, 0, 129, 127, 0, 19, 102}, {8751, 0, 129, 127, 0, 19, 102},
-    {8752, 0, 129, 127, 0, 19, 102}, {8753, 0, 129, 127, 0, 19, 102},
-    {8754, 0, 129, 127, 0, 19, 102}, {8755, 0, 129, 127, 0, 19, 102},
-    {8756, 0, 129, 127, 0, 19, 102}, {8757, 0, 129, 127, 0, 19, 102},
-    {8758, 0, 129, 127, 0, 19, 102}, {8759, 0, 129, 127, 0, 19, 102},
-    {8760, 0, 129, 127, 0, 19, 102}, {8761, 0, 129, 127, 0, 19, 102},
-    {8762, 0, 129, 127, 0, 19, 102}, {8763, 0, 129, 127, 0, 19, 102},
-    {8764, 0, 129, 127, 0, 19, 102}, {8765, 0, 129, 127, 0, 19, 102},
-    {8766, 0, 129, 127, 0, 19, 102}, {8767, 0, 129, 127, 0, 19, 102},
-    {8768, 0, 129, 127, 0, 19, 102}, {8769, 0, 129, 127, 0, 19, 102},
-    {8770, 0, 129, 127, 0, 19, 102}, {8771, 0, 129, 127, 0, 19, 102},
-    {8772, 0, 129, 127, 0, 19, 102}, {8773, 0, 129, 127, 0, 19, 102},
-    {8774, 0, 129, 127, 0, 19, 102}, {8775, 0, 129, 127, 0, 19, 102},
-    {8776, 0, 129, 127, 0, 19, 102}, {8777, 0, 129, 127, 0, 19, 102},
-    {8778, 0, 129, 127, 0, 19, 102}, {8779, 0, 129, 127, 0, 19, 114},
-    {8780, 0, 129, 127, 0, 19, 108}, {8781, 0, 129, 127, 0, 19, 114},
-    {8782, 0, 129, 127, 0, 13, 114}, {8783, 0, 129, 127, 0, 19, 108},
-    {8784, 0, 129, 127, 0, 13, 114}, {8785, 0, 129, 127, 0, 19, 108},
-    {8786, 0, 129, 127, 0, 19, 108}, {8787, 0, 129, 127, 0, 19, 108},
-    {8788, 0, 129, 127, 0, 19, 108}, {8789, 0, 129, 127, 0, 19, 108},
-    {8790, 0, 129, 127, 0, 19, 108}, {8791, 0, 129, 127, 0, 19, 108},
-    {8792, 0, 129, 127, 0, 19, 108}, {8793, 0, 129, 127, 0, 19, 108},
-    {8794, 0, 129, 127, 0, 19, 108}, {8795, 0, 129, 127, 0, 19, 108},
-    {8796, 0, 129, 127, 0, 19, 108}, {8797, 0, 129, 127, 0, 19, 108},
-    {8798, 0, 129, 127, 0, 19, 108}, {8799, 0, 129, 127, 0, 19, 108},
-    {8800, 0, 129, 127, 0, 19, 108}, {8801, 0, 129, 127, 0, 19, 108},
-    {8802, 0, 129, 127, 0, 19, 108}, {8803, 0, 129, 127, 0, 19, 108},
-    {8804, 0, 129, 127, 0, 19, 108}, {8805, 0, 129, 127, 0, 19, 108},
-    {8806, 0, 129, 127, 0, 19, 108}, {8807, 0, 129, 127, 0, 19, 108},
-    {8808, 0, 129, 127, 0, 19, 108}, {8809, 0, 129, 127, 0, 19, 108},
-    {8810, 0, 129, 127, 0, 19, 108}, {8811, 0, 129, 127, 0, 19, 114},
-    {8812, 0, 129, 127, 0, 19, 102}, {8813, 0, 129, 127, 0, 19, 114},
-    {8814, 0, 129, 127, 0, 76, 102}, {8815, 0, 129, 127, 0, 13, 121},
-    {8816, 0, 129, 127, 0, 19, 114}, {8817, 0, 129, 127, 0, 19, 127},
-    {8818, 0, 129, 127, 0, 19, 114}, {8819, 0, 129, 127, 0, 218, 108},
-};
+
 const uint8_t* CPDF_CIDFont::GetCIDTransform(FX_WORD CID) const {
-  if (m_Charset != CIDSET_JAPAN1 || m_pFontFile != NULL) {
-    return NULL;
-  }
+  if (m_Charset != CIDSET_JAPAN1 || m_pFontFile)
+    return nullptr;
+
   int begin = 0;
-  int end = sizeof Japan1_VertCIDs / sizeof(struct _CIDTransform) - 1;
+  int end = FX_ArraySize(g_Japan1_VertCIDs) - 1;
   while (begin <= end) {
     int middle = (begin + end) / 2;
-    FX_WORD middlecode = Japan1_VertCIDs[middle].CID;
+    FX_WORD middlecode = g_Japan1_VertCIDs[middle].CID;
     if (middlecode > CID) {
       end = middle - 1;
     } else if (middlecode < CID) {
       begin = middle + 1;
     } else {
-      return &Japan1_VertCIDs[middle].a;
+      return &g_Japan1_VertCIDs[middle].a;
     }
   }
-  return NULL;
+  return nullptr;
 }
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
index 4e5ef1c898..127fb93250 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
@@ -71,7 +71,7 @@ CPDF_StreamContentParser::CPDF_StreamContentParser(
     m_pCurStates->m_TextState.New();
     m_pCurStates->m_ColorState.New();
   }
-  for (int i = 0; i < FX_ArraySize(m_Type3Data); ++i) {
+  for (size_t i = 0; i < FX_ArraySize(m_Type3Data); ++i) {
     m_Type3Data[i] = 0.0;
   }
 }
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
index 1e7f077d48..c3029e0091 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
@@ -738,7 +738,7 @@ void CPDF_DIBSource::LoadJpxBitmap() {
   }
   m_pCachedBitmap->Clear(0xFFFFFFFF);
   std::vector<uint8_t> output_offsets(components);
-  for (int i = 0; i < components; ++i)
+  for (FX_DWORD i = 0; i < components; ++i)
     output_offsets[i] = i;
   if (bSwapRGB) {
     output_offsets[0] = 2;
@@ -1484,7 +1484,7 @@ void CPDF_DIBSource::DownSampleScanline32Bit(int orig_Bpp,
                                               bTransMask);
           }
         } else {
-          for (int j = 0; j < m_nComponents; ++j) {
+          for (FX_DWORD j = 0; j < m_nComponents; ++j) {
             int color_value =
                 (int)((m_pCompData[j].m_DecodeMin +
                        m_pCompData[j].m_DecodeStep * (FX_FLOAT)pSrcPixel[j]) *
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_text.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_text.cpp
index eff7b06e67..472e96a3c4 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render_text.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render_text.cpp
@@ -525,7 +525,7 @@ class CPDF_CharPosList {
   FXTEXT_CHARPOS* m_pCharPos;
   FX_DWORD m_nChars;
 };
-FX_FLOAT _CIDTransformToFloat(uint8_t ch);
+
 CPDF_CharPosList::CPDF_CharPosList() {
   m_pCharPos = NULL;
 }
@@ -578,12 +578,14 @@ void CPDF_CharPosList::Load(int nChars,
     }
     const uint8_t* pTransform = pCIDFont->GetCIDTransform(CID);
     if (pTransform && !bVert) {
-      charpos.m_AdjustMatrix[0] = _CIDTransformToFloat(pTransform[0]);
-      charpos.m_AdjustMatrix[2] = _CIDTransformToFloat(pTransform[2]);
-      charpos.m_AdjustMatrix[1] = _CIDTransformToFloat(pTransform[1]);
-      charpos.m_AdjustMatrix[3] = _CIDTransformToFloat(pTransform[3]);
-      charpos.m_OriginX += _CIDTransformToFloat(pTransform[4]) * FontSize;
-      charpos.m_OriginY += _CIDTransformToFloat(pTransform[5]) * FontSize;
+      charpos.m_AdjustMatrix[0] = pCIDFont->CIDTransformToFloat(pTransform[0]);
+      charpos.m_AdjustMatrix[2] = pCIDFont->CIDTransformToFloat(pTransform[2]);
+      charpos.m_AdjustMatrix[1] = pCIDFont->CIDTransformToFloat(pTransform[1]);
+      charpos.m_AdjustMatrix[3] = pCIDFont->CIDTransformToFloat(pTransform[3]);
+      charpos.m_OriginX +=
+          pCIDFont->CIDTransformToFloat(pTransform[4]) * FontSize;
+      charpos.m_OriginY +=
+          pCIDFont->CIDTransformToFloat(pTransform[5]) * FontSize;
       charpos.m_bGlyphAdjust = TRUE;
     }
   }
diff --git a/core/src/fxcodec/codec/fx_codec_jpeg.cpp b/core/src/fxcodec/codec/fx_codec_jpeg.cpp
index db0c2eae4b..4c002772e7 100644
--- a/core/src/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpeg.cpp
@@ -257,7 +257,7 @@ static void _JpegEncode(const CFX_DIBSource* pSource,
     if (nComponents > 1) {
       uint8_t* dest_scan = line_buf;
       if (nComponents == 3) {
-        for (int i = 0; i < width; i++) {
+        for (FX_DWORD i = 0; i < width; i++) {
           dest_scan[0] = src_scan[2];
           dest_scan[1] = src_scan[1];
           dest_scan[2] = src_scan[0];
@@ -265,7 +265,7 @@ static void _JpegEncode(const CFX_DIBSource* pSource,
           src_scan += Bpp;
         }
       } else {
-        for (int i = 0; i < pitch; i++) {
+        for (FX_DWORD i = 0; i < pitch; i++) {
           *dest_scan++ = ~*src_scan++;
         }
       }
diff --git a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
index 9b0f42b343..616af36b00 100644
--- a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
@@ -658,7 +658,7 @@ class CJPX_Decoder {
  public:
   explicit CJPX_Decoder(bool use_colorspace);
   ~CJPX_Decoder();
-  FX_BOOL Init(const unsigned char* src_data, int src_size);
+  FX_BOOL Init(const unsigned char* src_data, FX_DWORD src_size);
   void GetInfo(FX_DWORD* width, FX_DWORD* height, FX_DWORD* components);
   bool Decode(uint8_t* dest_buf,
               int pitch,
@@ -666,7 +666,7 @@ class CJPX_Decoder {
 
  private:
   const uint8_t* m_SrcData;
-  int m_SrcSize;
+  FX_DWORD m_SrcSize;
   opj_image_t* image;
   opj_codec_t* l_codec;
   opj_stream_t* l_stream;
@@ -692,12 +692,12 @@ CJPX_Decoder::~CJPX_Decoder() {
   }
 }
 
-FX_BOOL CJPX_Decoder::Init(const unsigned char* src_data, int src_size) {
+FX_BOOL CJPX_Decoder::Init(const unsigned char* src_data, FX_DWORD src_size) {
   static const unsigned char szJP2Header[] = {
       0x00, 0x00, 0x00, 0x0c, 0x6a, 0x50, 0x20, 0x20, 0x0d, 0x0a, 0x87, 0x0a};
-  if (!src_data || src_size < sizeof(szJP2Header)) {
+  if (!src_data || src_size < sizeof(szJP2Header))
     return FALSE;
-  }
+
   image = NULL;
   m_SrcData = src_data;
   m_SrcSize = src_size;
diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp
index 61a45bebae..cbbe6af70e 100644
--- a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.cpp
@@ -8,47 +8,44 @@
 
 #include "JBig2_Define.h"
 
-CJBig2_HuffmanDecoder::CJBig2_HuffmanDecoder(CJBig2_BitStream* pStream) {
-  m_pStream = pStream;
+CJBig2_HuffmanDecoder::CJBig2_HuffmanDecoder(CJBig2_BitStream* pStream)
+    : m_pStream(pStream) {
 }
+
 CJBig2_HuffmanDecoder::~CJBig2_HuffmanDecoder() {}
+
 int CJBig2_HuffmanDecoder::decodeAValue(CJBig2_HuffmanTable* pTable,
                                         int* nResult) {
-  int i;
   int nVal = 0;
   int nBits = 0;
-  FX_DWORD nTmp;
   while (1) {
-    if (m_pStream->read1Bit(&nTmp) == -1) {
+    FX_DWORD nTmp;
+    if (m_pStream->read1Bit(&nTmp) == -1)
       return -1;
-    }
+
     nVal = (nVal << 1) | nTmp;
-    nBits++;
-    for (i = 0; i < pTable->NTEMP; i++) {
+    ++nBits;
+    for (FX_DWORD i = 0; i < pTable->NTEMP; ++i) {
       if ((pTable->PREFLEN[i] == nBits) && (pTable->CODES[i] == nVal)) {
-        if ((pTable->HTOOB == 1) && (i == pTable->NTEMP - 1)) {
+        if ((pTable->HTOOB == 1) && (i == pTable->NTEMP - 1))
           return JBIG2_OOB;
-        }
-        if (m_pStream->readNBits(pTable->RANGELEN[i], &nTmp) == -1) {
+
+        if (m_pStream->readNBits(pTable->RANGELEN[i], &nTmp) == -1)
           return -1;
-        }
+
         if (pTable->HTOOB) {
-          if (i == pTable->NTEMP - 3) {
+          if (i == pTable->NTEMP - 3)
             *nResult = pTable->RANGELOW[i] - nTmp;
-            return 0;
-          } else {
+          else
             *nResult = pTable->RANGELOW[i] + nTmp;
-            return 0;
-          }
-        } else {
-          if (i == pTable->NTEMP - 2) {
-            *nResult = pTable->RANGELOW[i] - nTmp;
-            return 0;
-          } else {
-            *nResult = pTable->RANGELOW[i] + nTmp;
-            return 0;
-          }
+          return 0;
         }
+
+        if (i == pTable->NTEMP - 2)
+          *nResult = pTable->RANGELOW[i] - nTmp;
+        else
+          *nResult = pTable->RANGELOW[i] + nTmp;
+        return 0;
       }
     }
   }
diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.h b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.h
index c972aae074..e15e891060 100644
--- a/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.h
+++ b/core/src/fxcodec/jbig2/JBig2_HuffmanDecoder.h
@@ -10,13 +10,13 @@
 #include "JBig2_HuffmanTable.h"
 class CJBig2_HuffmanDecoder {
  public:
-  CJBig2_HuffmanDecoder(CJBig2_BitStream* pStream);
+  explicit CJBig2_HuffmanDecoder(CJBig2_BitStream* pStream);
 
   ~CJBig2_HuffmanDecoder();
 
   int decodeAValue(CJBig2_HuffmanTable* pTable, int* nResult);
 
  private:
-  CJBig2_BitStream* m_pStream;
+  CJBig2_BitStream* const m_pStream;
 };
 #endif
diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp
index a09d152052..4effbfadef 100644
--- a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.cpp
@@ -35,25 +35,22 @@ CJBig2_HuffmanTable::~CJBig2_HuffmanTable() {
 void CJBig2_HuffmanTable::init() {
   HTOOB = FALSE;
   NTEMP = 0;
-  CODES = NULL;
-  PREFLEN = NULL;
-  RANGELEN = NULL;
-  RANGELOW = NULL;
+  CODES = nullptr;
+  PREFLEN = nullptr;
+  RANGELEN = nullptr;
+  RANGELOW = nullptr;
 }
 int CJBig2_HuffmanTable::parseFromStandardTable(const JBig2TableLine* pTable,
                                                 int nLines,
                                                 FX_BOOL bHTOOB) {
-  int CURLEN, LENMAX, CURCODE, CURTEMP;
-  int* LENCOUNT;
-  int* FIRSTCODE;
   HTOOB = bHTOOB;
   NTEMP = nLines;
   CODES = FX_Alloc(int, NTEMP);
   PREFLEN = FX_Alloc(int, NTEMP);
   RANGELEN = FX_Alloc(int, NTEMP);
   RANGELOW = FX_Alloc(int, NTEMP);
-  LENMAX = 0;
-  for (int i = 0; i < NTEMP; i++) {
+  int LENMAX = 0;
+  for (FX_DWORD i = 0; i < NTEMP; ++i) {
     PREFLEN[i] = pTable[i].PREFLEN;
     RANGELEN[i] = pTable[i].RANDELEN;
     RANGELOW[i] = pTable[i].RANGELOW;
@@ -61,19 +58,19 @@ int CJBig2_HuffmanTable::parseFromStandardTable(const JBig2TableLine* pTable,
       LENMAX = PREFLEN[i];
     }
   }
-  LENCOUNT = FX_Alloc(int, LENMAX + 1);
+  int* LENCOUNT = FX_Alloc(int, LENMAX + 1);
   JBIG2_memset(LENCOUNT, 0, sizeof(int) * (LENMAX + 1));
-  FIRSTCODE = FX_Alloc(int, LENMAX + 1);
-  for (int i = 0; i < NTEMP; i++) {
-    LENCOUNT[PREFLEN[i]]++;
-  }
-  CURLEN = 1;
+  int* FIRSTCODE = FX_Alloc(int, LENMAX + 1);
+  for (FX_DWORD i = 0; i < NTEMP; ++i)
+    ++LENCOUNT[PREFLEN[i]];
+
+  int CURLEN = 1;
   FIRSTCODE[0] = 0;
   LENCOUNT[0] = 0;
   while (CURLEN <= LENMAX) {
     FIRSTCODE[CURLEN] = (FIRSTCODE[CURLEN - 1] + LENCOUNT[CURLEN - 1]) << 1;
-    CURCODE = FIRSTCODE[CURLEN];
-    CURTEMP = 0;
+    int CURCODE = FIRSTCODE[CURLEN];
+    FX_DWORD CURTEMP = 0;
     while (CURTEMP < NTEMP) {
       if (PREFLEN[CURTEMP] == CURLEN) {
         CODES[CURTEMP] = CURCODE;
@@ -109,6 +106,7 @@ int CJBig2_HuffmanTable::parseFromCodedBuffer(CJBig2_BitStream* pStream) {
       pStream->readInteger(&HTHIGH) == -1 || HTLOW > HTHIGH) {
     return FALSE;
   }
+
   FX_DWORD nSize = 16;
   PREFLEN = FX_Alloc(int, nSize);
   RANGELEN = FX_Alloc(int, nSize);
@@ -131,7 +129,7 @@ int CJBig2_HuffmanTable::parseFromCodedBuffer(CJBig2_BitStream* pStream) {
 
   RANGELEN[NTEMP] = 32;
   RANGELOW[NTEMP] = HTLOW - 1;
-  NTEMP = NTEMP + 1;
+  ++NTEMP;
   HT_CHECK_MEMORY_ADJUST
   if (pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1)
     return FALSE;
@@ -143,18 +141,19 @@ int CJBig2_HuffmanTable::parseFromCodedBuffer(CJBig2_BitStream* pStream) {
     HT_CHECK_MEMORY_ADJUST
     if (pStream->readNBits(HTPS, &PREFLEN[NTEMP]) == -1)
       return FALSE;
-    NTEMP = NTEMP + 1;
+
+    ++NTEMP;
   }
   CODES = FX_Alloc(int, NTEMP);
   int LENMAX = 0;
-  for (int i = 0; i < NTEMP; i++) {
+  for (FX_DWORD i = 0; i < NTEMP; ++i) {
     if (PREFLEN[i] > LENMAX) {
       LENMAX = PREFLEN[i];
     }
   }
 
   std::vector<int> LENCOUNT(LENMAX + 1);
-  for (int i = 0; i < NTEMP; ++i)
+  for (FX_DWORD i = 0; i < NTEMP; ++i)
     LENCOUNT[PREFLEN[i]]++;
   LENCOUNT[0] = 0;
 
@@ -163,7 +162,7 @@ int CJBig2_HuffmanTable::parseFromCodedBuffer(CJBig2_BitStream* pStream) {
   for (int i = 0; i <= LENMAX; ++i) {
     FIRSTCODE[i] = (FIRSTCODE[i - 1] + LENCOUNT[i - 1]) << 1;
     int CURCODE = FIRSTCODE[i];
-    for (int j = 0; j < NTEMP; ++j) {
+    for (FX_DWORD j = 0; j < NTEMP; ++j) {
       if (PREFLEN[j] == i)
         CODES[j] = CURCODE++;
     }
diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h
index 7c843cf91b..fe8294dc7e 100644
--- a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h
+++ b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h
@@ -14,7 +14,7 @@ class CJBig2_HuffmanTable {
  public:
   CJBig2_HuffmanTable(const JBig2TableLine* pTable, int nLines, FX_BOOL bHTOOB);
 
-  CJBig2_HuffmanTable(CJBig2_BitStream* pStream);
+  explicit CJBig2_HuffmanTable(CJBig2_BitStream* pStream);
 
   ~CJBig2_HuffmanTable();
 
@@ -24,13 +24,13 @@ class CJBig2_HuffmanTable {
 
   int parseFromCodedBuffer(CJBig2_BitStream* pStream);
 
-  FX_BOOL isOK() { return m_bOK; }
+  FX_BOOL isOK() const { return m_bOK; }
 
  private:
   void init();
 
   FX_BOOL HTOOB;
-  int NTEMP;
+  FX_DWORD NTEMP;
   int* CODES;
   int* PREFLEN;
   int* RANGELEN;