Replace NULL with nullptr or null in webrtc/base/.

webrtc/base/stringencode.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 123 matching lines @@
 
 const unsigned char ASCII_CLASS[128] = {
   1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
   1,0,3,1,1,1,3,2,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,1,3,1,3,1,
   1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,
   1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,1,
 };
 
 size_t url_encode(char * buffer, size_t buflen,
                   const char * source, size_t srclen) {
-  if (NULL == buffer)
+  if (nullptr == buffer)
     return srclen * 3 + 1;
   if (buflen <= 0)
     return 0;
 
   size_t srcpos = 0, bufpos = 0;
   while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
     unsigned char ch = source[srcpos++];
     if ((ch < 128) && (ASCII_CLASS[ch] & URL_UNSAFE)) {
       if (bufpos + 3 >= buflen) {
         break;
       }
       buffer[bufpos+0] = '%';
       buffer[bufpos+1] = hex_encode((ch >> 4) & 0xF);
       buffer[bufpos+2] = hex_encode((ch     ) & 0xF);
       bufpos += 3;
     } else {
       buffer[bufpos++] = ch;
     }
   }
   buffer[bufpos] = '\0';
   return bufpos;
 }
 
 size_t url_decode(char * buffer, size_t buflen,
                   const char * source, size_t srclen) {
-  if (NULL == buffer)
+  if (nullptr == buffer)
     return srclen + 1;
   if (buflen <= 0)
     return 0;
 
   unsigned char h1, h2;
   size_t srcpos = 0, bufpos = 0;
   while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
     unsigned char ch = source[srcpos++];
     if (ch == '+') {
       buffer[bufpos++] = ' ';
@@ skipping 358 matching lines @@
 size_t transform(std::string& value, size_t maxlen, const std::string& source,
                  Transform t) {
   char* buffer = STACK_ARRAY(char, maxlen + 1);
   size_t length = t(buffer, maxlen + 1, source.data(), source.length());
   value.assign(buffer, length);
   return length;
 }
 
 std::string s_transform(const std::string& source, Transform t) {
   // Ask transformation function to approximate the destination size (returns upper bound)
-  size_t maxlen = t(NULL, 0, source.data(), source.length());
+  size_t maxlen = t(nullptr, 0, source.data(), source.length());
   char * buffer = STACK_ARRAY(char, maxlen);
   size_t len = t(buffer, maxlen, source.data(), source.length());
   std::string result(buffer, len);
   return result;
 }
 
 size_t tokenize(const std::string& source, char delimiter,
                 std::vector<std::string>* fields) {
   fields->clear();
   size_t last = 0;
@@ skipping 127 matching lines @@
   va_list args;
   va_start(args, format);
   value.assign(buffer, vsprintfn(buffer, maxlen + 1, format, args));
   va_end(args);
 }
 */
 
 /////////////////////////////////////////////////////////////////////////////
 
 }  // namespace rtc