fgas/ code cleanup.

xfa/fgas/crt/fgas_algorithm.h

 // 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
 
 #ifndef XFA_FGAS_CRT_FGAS_ALGORITHM_H_
 #define XFA_FGAS_CRT_FGAS_ALGORITHM_H_
 
 #include <cstdint>
 
 #include "core/fxcrt/include/fx_basic.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-int32_t FX_Base64EncodeA(const uint8_t* pSrc, int32_t iSrcLen, FX_CHAR* pDst);
-int32_t FX_Base64DecodeA(const FX_CHAR* pSrc, int32_t iSrcLen, uint8_t* pDst);
-int32_t FX_Base64DecodeW(const FX_WCHAR* pSrc, int32_t iSrcLen, uint8_t* pDst);
-uint8_t FX_Hex2Dec(uint8_t hexHigh, uint8_t hexLow);
-int32_t FX_SeparateStringW(const FX_WCHAR* pStr,
-                           int32_t iStrLen,
-                           FX_WCHAR delimiter,
-                           CFX_WideStringArray& pieces);
-#ifdef __cplusplus
-};
-#endif
-
 template <class baseType>
 class CFX_DSPATemplate {
  public:
   int32_t Lookup(const baseType& find, const baseType* pArray, int32_t iCount) {
-    ASSERT(pArray != NULL);
-    if (iCount < 1) {
+    ASSERT(pArray);
+    if (iCount < 1)
       return -1;
-    }
+
     int32_t iStart = 0, iEnd = iCount - 1, iMid;
     do {
       iMid = (iStart + iEnd) / 2;
       const baseType& v = pArray[iMid];
-      if (find == v) {
+      if (find == v)
         return iMid;
-      } else if (find < v) {
+      if (find < v)
         iEnd = iMid - 1;
-      } else {
+      else
         iStart = iMid + 1;
-      }
     } while (iStart <= iEnd);
     return -1;
   }
 };
 
 #endif  // XFA_FGAS_CRT_FGAS_ALGORITHM_H_