diff --git a/core/include/fpdfapi/fpdf_parser.h b/core/include/fpdfapi/fpdf_parser.h
index e1a0f5c..0ed8ed2 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -46,6 +46,14 @@
 #define FPDFPERM_ASSEMBLE		0x0400
 #define FPDFPERM_PRINT_HIGH		0x0800
 #define FPDF_PAGE_MAX_NUM		0xFFFFF
+
+// Indexed by 8-bit character code, contains either:
+//   'W' - for whitespace: NUL, TAB, CR, LF, FF, 0x80, 0xff
+//   'N' - for numeric: 0123456789+-.
+//   'D' - for delimiter: %()/<>[]{}
+//   'R' - otherwise.
+extern const char PDF_CharType[256];
+
 class IPDF_EnumPageHandler
 {
 public:
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
index bb29595..9177c3e 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
@@ -307,13 +307,12 @@
     dest_buf = 0;
     return (FX_DWORD) - 1;
 }
-extern const FX_LPCSTR _PDF_CharType;
 CPDF_Stream* CPDF_StreamParser::ReadInlineStream(CPDF_Document* pDoc, CPDF_Dictionary* pDict, CPDF_Object* pCSObj, FX_BOOL bDecode)
 {
     if (m_Pos == m_Size) {
         return NULL;
     }
-    if (_PDF_CharType[m_pBuf[m_Pos]] == 'W') {
+    if (PDF_CharType[m_pBuf[m_Pos]] == 'W') {
         m_Pos ++;
     }
     CFX_ByteString Decoder;
@@ -447,14 +446,14 @@
         return EndOfData;
     }
     int ch = m_pBuf[m_Pos++];
-    int type = _PDF_CharType[ch];
+    int type = PDF_CharType[ch];
     while (1) {
         while (type == 'W') {
             if (m_Size <= m_Pos) {
                 return EndOfData;
             }
             ch = m_pBuf[m_Pos++];
-            type = _PDF_CharType[ch];
+            type = PDF_CharType[ch];
         }
         if (ch != '%') {
             break;
@@ -468,7 +467,7 @@
                 break;
             }
         }
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
     }
     if (type == 'D' && ch != '/') {
         m_Pos --;
@@ -486,7 +485,7 @@
             break;
         }
         ch = m_pBuf[m_Pos++];
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
         if (type == 'D' || type == 'W') {
             m_Pos --;
             break;
@@ -523,14 +522,14 @@
         return;
     }
     int ch = m_pBuf[m_Pos++];
-    int type = _PDF_CharType[ch];
+    int type = PDF_CharType[ch];
     while (1) {
         while (type == 'W') {
             if (m_Pos >= m_Size) {
                 return;
             }
             ch = m_pBuf[m_Pos++];
-            type = _PDF_CharType[ch];
+            type = PDF_CharType[ch];
         }
         if (type != 'N') {
             m_Pos = command_startpos;
@@ -542,14 +541,14 @@
                     return;
                 }
                 ch = m_pBuf[m_Pos++];
-                type = _PDF_CharType[ch];
+                type = PDF_CharType[ch];
             }
             while (type == 'W') {
                 if (m_Pos >= m_Size) {
                     return;
                 }
                 ch = m_pBuf[m_Pos++];
-                type = _PDF_CharType[ch];
+                type = PDF_CharType[ch];
             }
             if (type == 'N') {
                 continue;
@@ -560,7 +559,7 @@
                     return;
                 }
                 ch = m_pBuf[m_Pos++];
-                type = _PDF_CharType[ch];
+                type = PDF_CharType[ch];
             }
             if (m_Pos - op_startpos == 2) {
                 int op = m_pBuf[op_startpos];
@@ -672,14 +671,14 @@
         return;
     }
     int ch = m_pBuf[m_Pos++];
-    int type = _PDF_CharType[ch];
+    int type = PDF_CharType[ch];
     while (1) {
         while (type == 'W') {
             if (m_Size <= m_Pos) {
                 return;
             }
             ch = m_pBuf[m_Pos++];
-            type = _PDF_CharType[ch];
+            type = PDF_CharType[ch];
         }
         if (ch != '%') {
             break;
@@ -693,7 +692,7 @@
                 break;
             }
         }
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
     }
     if (type == 'D') {
         bIsNumber = FALSE;
@@ -704,7 +703,7 @@
                     return;
                 }
                 ch = m_pBuf[m_Pos++];
-                type = _PDF_CharType[ch];
+                type = PDF_CharType[ch];
                 if (type != 'R' && type != 'N') {
                     m_Pos --;
                     return;
@@ -747,7 +746,7 @@
             return;
         }
         ch = m_pBuf[m_Pos++];
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
         if (type == 'D' || type == 'W') {
             m_Pos --;
             break;
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp
index 610fb39..d17b123 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_filters.cpp
@@ -576,12 +576,11 @@
     m_State = 0;
     m_CharCount = 0;
 }
-extern const FX_LPCSTR _PDF_CharType;
 void CPDF_Ascii85Filter::v_FilterIn(FX_LPCBYTE src_buf, FX_DWORD src_size, CFX_BinaryBuf& dest_buf)
 {
     for (FX_DWORD i = 0; i < src_size; i ++) {
         FX_BYTE byte = src_buf[i];
-        if (_PDF_CharType[byte] == 'W') {
+        if (PDF_CharType[byte] == 'W') {
             continue;
         }
         switch (m_State) {
@@ -640,7 +639,7 @@
 {
     for (FX_DWORD i = 0; i < src_size; i ++) {
         FX_BYTE byte = src_buf[i];
-        if (_PDF_CharType[byte] == 'W') {
+        if (PDF_CharType[byte] == 'W') {
             continue;
         }
         int digit;
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index 8195989..29265f4 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -12,7 +12,6 @@
 #include <utility>
 #include <vector>
 
-extern const FX_LPCSTR _PDF_CharType;
 FX_BOOL IsSignatureDict(const CPDF_Dictionary* pDict)
 {
     CPDF_Object* pType = pDict->GetElementValue(FX_BSTRC("Type"));
@@ -648,7 +647,7 @@
             FX_BYTE byte = buffer[i];
             switch (status) {
                 case 0:
-                    if (_PDF_CharType[byte] == 'W') {
+                    if (PDF_CharType[byte] == 'W') {
                         status = 1;
                     }
                     if (byte <= '9' && byte >= '0') {
@@ -676,7 +675,7 @@
                     }
                     break;
                 case 1:
-                    if (_PDF_CharType[byte] == 'W') {
+                    if (PDF_CharType[byte] == 'W') {
                         break;
                     } else if (byte <= '9' && byte >= '0') {
                         start_pos = pos + i;
@@ -697,7 +696,7 @@
                     if (byte <= '9' && byte >= '0') {
                         objnum = objnum * 10 + byte - '0';
                         break;
-                    } else if (_PDF_CharType[byte] == 'W') {
+                    } else if (PDF_CharType[byte] == 'W') {
                         status = 3;
                     } else {
                         --i;
@@ -710,7 +709,7 @@
                         start_pos1 = pos + i;
                         status = 4;
                         gennum = byte - '0';
-                    } else if (_PDF_CharType[byte] == 'W') {
+                    } else if (PDF_CharType[byte] == 'W') {
                         break;
                     } else if (byte == 't') {
                         status = 7;
@@ -724,7 +723,7 @@
                     if (byte <= '9' && byte >= '0') {
                         gennum = gennum * 10 + byte - '0';
                         break;
-                    } else if (_PDF_CharType[byte] == 'W') {
+                    } else if (PDF_CharType[byte] == 'W') {
                         status = 5;
                     } else {
                         --i;
@@ -735,7 +734,7 @@
                     if (byte == 'o') {
                         status = 6;
                         inside_index = 1;
-                    } else if (_PDF_CharType[byte] == 'W') {
+                    } else if (PDF_CharType[byte] == 'W') {
                         break;
                     } else if (byte <= '9' && byte >= '0') {
                         objnum = gennum;
@@ -770,7 +769,7 @@
                             }
                             break;
                         case 3:
-                            if (_PDF_CharType[byte] == 'W' || _PDF_CharType[byte] == 'D') {
+                            if (PDF_CharType[byte] == 'W' || PDF_CharType[byte] == 'D') {
                                 if (objnum > 0x1000000) {
                                     status = 0;
                                     break;
@@ -844,7 +843,7 @@
                     break;
                 case 7:
                     if (inside_index == 7) {
-                        if (_PDF_CharType[byte] == 'W' || _PDF_CharType[byte] == 'D') {
+                        if (PDF_CharType[byte] == 'W' || PDF_CharType[byte] == 'D') {
                             last_trailer = pos + i - 7;
                             m_Syntax.RestorePos(pos + i - m_Syntax.m_HeaderOffset);
                             CPDF_Object* pObj = m_Syntax.GetObject(m_pDocument, 0, 0, 0);
@@ -949,13 +948,13 @@
                     status = 0;
                     break;
                 case 13:
-                    if (_PDF_CharType[byte] == 'D' || _PDF_CharType[byte] == 'W') {
+                    if (PDF_CharType[byte] == 'D' || PDF_CharType[byte] == 'W') {
                         --i;
                         status = 0;
                     }
                     break;
                 case 14:
-                    if (_PDF_CharType[byte] == 'W') {
+                    if (PDF_CharType[byte] == 'W') {
                         status = 0;
                     } else if (byte == '%' || byte == '(' || byte == '<' || byte == '\\') {
                         status = 0;
@@ -1649,14 +1648,14 @@
     FX_BYTE ch = 0;
     FX_DWORD dwCount = 0;
     m_Syntax.GetNextChar(ch);
-    FX_INT32 type = _PDF_CharType[ch];
+    FX_INT32 type = PDF_CharType[ch];
     while (type == 'W') {
         ++dwCount;
         if (m_Syntax.m_FileLen >= (FX_FILESIZE)(m_Syntax.SavePos() + m_Syntax.m_HeaderOffset)) {
             break;
         }
         m_Syntax.GetNextChar(ch);
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
     }
     m_LastXRefOffset += dwCount;
     FX_POSITION pos = m_ObjectStreamMap.GetStartPosition();
@@ -1781,13 +1780,13 @@
     if (!GetNextChar(ch)) {
         return;
     }
-    FX_BYTE type = _PDF_CharType[ch];
+    FX_BYTE type = PDF_CharType[ch];
     while (1) {
         while (type == 'W') {
             if (!GetNextChar(ch)) {
                 return;
             }
-            type = _PDF_CharType[ch];
+            type = PDF_CharType[ch];
         }
         if (ch != '%') {
             break;
@@ -1800,7 +1799,7 @@
                 break;
             }
         }
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
     }
     if (type == 'D') {
         m_bIsNumber = FALSE;
@@ -1810,7 +1809,7 @@
                 if (!GetNextChar(ch)) {
                     return;
                 }
-                type = _PDF_CharType[ch];
+                type = PDF_CharType[ch];
                 if (type != 'R' && type != 'N') {
                     m_Pos --;
                     return;
@@ -1850,7 +1849,7 @@
         if (!GetNextChar(ch)) {
             return;
         }
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
         if (type == 'D' || type == 'W') {
             m_Pos --;
             break;
@@ -2018,14 +2017,14 @@
     if (!GetNextChar(ch)) {
         return;
     }
-    FX_BYTE type = _PDF_CharType[ch];
+    FX_BYTE type = PDF_CharType[ch];
     while (1) {
         while (type == 'W') {
             m_dwWordPos = m_Pos;
             if (!GetNextChar(ch)) {
                 return;
             }
-            type = _PDF_CharType[ch];
+            type = PDF_CharType[ch];
         }
         if (ch != '%') {
             break;
@@ -2038,7 +2037,7 @@
                 break;
             }
         }
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
     }
     m_Pos --;
 }
@@ -2530,19 +2529,19 @@
 }
 FX_BOOL CPDF_SyntaxParser::IsWholeWord(FX_FILESIZE startpos, FX_FILESIZE limit, FX_LPCBYTE tag, FX_DWORD taglen)
 {
-    FX_BYTE type = _PDF_CharType[tag[0]];
+    FX_BYTE type = PDF_CharType[tag[0]];
     FX_BOOL bCheckLeft = type != 'D' && type != 'W';
-    type = _PDF_CharType[tag[taglen - 1]];
+    type = PDF_CharType[tag[taglen - 1]];
     FX_BOOL bCheckRight = type != 'D' && type != 'W';
     FX_BYTE ch;
     if (bCheckRight && startpos + (FX_INT32)taglen <= limit && GetCharAt(startpos + (FX_INT32)taglen, ch)) {
-        FX_BYTE type = _PDF_CharType[ch];
+        FX_BYTE type = PDF_CharType[ch];
         if (type == 'N' || type == 'R') {
             return FALSE;
         }
     }
     if (bCheckLeft && startpos > 0 && GetCharAt(startpos - 1, ch)) {
-        FX_BYTE type = _PDF_CharType[ch];
+        FX_BYTE type = PDF_CharType[ch];
         if (type == 'N' || type == 'R') {
             return FALSE;
         }
@@ -3828,13 +3827,13 @@
     if (!GetNextChar(ch)) {
         return FALSE;
     }
-    FX_BYTE type = _PDF_CharType[ch];
+    FX_BYTE type = PDF_CharType[ch];
     while (1) {
         while (type == 'W') {
             if (!GetNextChar(ch)) {
                 return FALSE;
             }
-            type = _PDF_CharType[ch];
+            type = PDF_CharType[ch];
         }
         if (ch != '%') {
             break;
@@ -3847,7 +3846,7 @@
                 break;
             }
         }
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
     }
     if (type == 'D') {
         m_WordBuffer[m_WordSize++] = ch;
@@ -3856,7 +3855,7 @@
                 if (!GetNextChar(ch)) {
                     return FALSE;
                 }
-                type = _PDF_CharType[ch];
+                type = PDF_CharType[ch];
                 if (type != 'R' && type != 'N') {
                     m_Pos --;
                     CFX_ByteString ret(m_WordBuffer, m_WordSize);
@@ -3897,7 +3896,7 @@
         if (!GetNextChar(ch)) {
             return FALSE;
         }
-        type = _PDF_CharType[ch];
+        type = PDF_CharType[ch];
         if (type == 'D' || type == 'W') {
             m_Pos --;
             break;
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp
index e5e68c2..bbfd4cc 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.cpp
@@ -5,15 +5,41 @@
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fpdfapi/fpdf_parser.h"
-extern const FX_LPCSTR _PDF_CharType =
-    "WRRRRRRRRWWRWWRRRRRRRRRRRRRRRRRR"
-    "WRRRRDRRDDRNRNNDNNNNNNNNNNRRDRDR"
-    "RRRRRRRRRRRRRRRRRRRRRRRRRRRDRDRR"
-    "RRRRRRRRRRRRRRRRRRRRRRRRRRRDRDRR"
-    "WRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
-    "RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
-    "RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
-    "RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRW";
+const char PDF_CharType[256] = {
+  //NUL  SOH  STX  ETX  EOT  ENQ  ACK  BEL  BS   HT   LF   VT   FF   CR   SO   SI
+    'W', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'W', 'W', 'R', 'W', 'W', 'R', 'R',
+
+  //DLE  DC1  DC2  DC3  DC4  NAK  SYN  ETB  CAN  EM   SUB  ESC  FS   GS   RS   US
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+
+  //SP    !    "    #    $    %    &    ´    (    )    *    +    ,    -    .    /
+    'W', 'R', 'R', 'R', 'R', 'D', 'R', 'R', 'D', 'D', 'R', 'N', 'R', 'N', 'N', 'D',
+
+  // 0    1    2    3    4    5    6    7    8    9    :    ;    <    =    >    ?
+    'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'R', 'R', 'D', 'R', 'D', 'R',
+
+  // @    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+
+  // P    Q    R    S    T    U    V    W    X    Y    Z    [    \    ]    ^    _
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'D', 'R', 'D', 'R', 'R',
+
+  // `    a    b    c    d    e    f    g    h    i    j    k    l    m    n    o
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+
+  // p    q    r    s    t    u    v    w    x    y    z    {    |    }    ~   DEL
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'D', 'R', 'D', 'R', 'R',
+
+    'W', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R',
+    'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'R', 'W'
+};
+
 #ifndef MAX_PATH
 #define MAX_PATH 4096
 #endif
@@ -41,13 +67,13 @@
             return;
         }
         ch = m_pData[m_dwCurPos++];
-        chartype = _PDF_CharType[ch];
+        chartype = PDF_CharType[ch];
         while (chartype == 'W') {
             if (m_dwSize <= m_dwCurPos) {
                 return;
             }
             ch = m_pData[m_dwCurPos++];
-            chartype = _PDF_CharType[ch];
+            chartype = PDF_CharType[ch];
         }
         if (ch != '%') {
             break;
@@ -61,7 +87,7 @@
                 break;
             }
         }
-        chartype = _PDF_CharType[ch];
+        chartype = PDF_CharType[ch];
     }
     FX_DWORD start_pos = m_dwCurPos - 1;
     pStart = m_pData + start_pos;
@@ -72,7 +98,7 @@
                     return;
                 }
                 ch = m_pData[m_dwCurPos++];
-                chartype = _PDF_CharType[ch];
+                chartype = PDF_CharType[ch];
                 if (chartype != 'R' && chartype != 'N') {
                     m_dwCurPos --;
                     dwSize = m_dwCurPos - start_pos;
@@ -117,7 +143,7 @@
             return;
         }
         ch = m_pData[m_dwCurPos++];
-        chartype = _PDF_CharType[ch];
+        chartype = PDF_CharType[ch];
         if (chartype == 'D' || chartype == 'W') {
             m_dwCurPos --;
             break;
@@ -297,8 +323,8 @@
     int i;
     for (i = 0; i < src_len; i ++) {
         FX_BYTE ch = src_buf[i];
-        if (ch >= 0x80 || _PDF_CharType[ch] == 'W' || ch == '#' ||
-                _PDF_CharType[ch] == 'D') {
+        if (ch >= 0x80 || PDF_CharType[ch] == 'W' || ch == '#' ||
+                PDF_CharType[ch] == 'D') {
             dest_len += 3;
         } else {
             dest_len ++;
@@ -312,8 +338,8 @@
     dest_len = 0;
     for (i = 0; i < src_len; i ++) {
         FX_BYTE ch = src_buf[i];
-        if (ch >= 0x80 || _PDF_CharType[ch] == 'W' || ch == '#' ||
-                _PDF_CharType[ch] == 'D') {
+        if (ch >= 0x80 || PDF_CharType[ch] == 'W' || ch == '#' ||
+                PDF_CharType[ch] == 'D') {
             dest_buf[dest_len++] = '#';
             dest_buf[dest_len++] = "0123456789ABCDEF"[ch / 16];
             dest_buf[dest_len++] = "0123456789ABCDEF"[ch % 16];