Revert "Revert "Revert "Cleanup some numeric code."""

core/src/fpdftext/fpdf_text_int.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 <ctype.h>
 #include <algorithm>
 
 #include "../../../third_party/base/nonstd_unique_ptr.h"
@@ skipping 2415 matching lines @@
     return TRUE;
   }
   if (startPos - 1 >= 0) {
     char_left = csPageText.GetAt(startPos - 1);
   }
   if (startPos + char_count < csPageText.GetLength()) {
     char_right = csPageText.GetAt(startPos + char_count);
   }
   if ((char_left > 'A' && char_left < 'a') ||
       (char_left > 'a' && char_left < 'z') ||
-      (char_left > 0xfb00 && char_left < 0xfb06) || std::isdigit(char_left) ||
+      (char_left > 0xfb00 && char_left < 0xfb06) ||
+      (char_left >= '0' && char_left <= '9') ||
       (char_right > 'A' && char_right < 'a') ||
       (char_right > 'a' && char_right < 'z') ||
       (char_right > 0xfb00 && char_right < 0xfb06) ||
-      std::isdigit(char_right)) {
+      (char_right >= '0' && char_right <= '9')) {
     return FALSE;
   }
   if (!(('A' > char_left || char_left > 'Z') &&
         ('a' > char_left || char_left > 'z') &&
         ('A' > char_right || char_right > 'Z') &&
         ('a' > char_right || char_right > 'z'))) {
     return FALSE;
   }
   if (char_count > 0) {
     if (csPageText.GetAt(startPos) >= L'0' &&
@@ skipping 274 matching lines @@
   if (!m_bIsParsed || index < 0 || index >= m_LinkList.GetSize()) {
     return;
   }
   CPDF_LinkExt* link = NULL;
   link = m_LinkList.GetAt(index);
   if (!link) {
     return;
   }
   m_pTextPage->GetRectArray(link->m_Start, link->m_Count, rects);
 }