Fix build warnings by using character literals. b=183354 r=smontagu sr=bzbarsky

extensions/universalchardet/src/nsUniversalDetector.cpp

@@ -125,32 +125,32 @@ void nsUniversalDetector::HandleData(const char* aBuf, PRUint32 aLen)
     if (aLen > 3)
       switch (aBuf[0])
         {
-        case 0xEF:
-          if ((0xBB == aBuf[1]) && (0xBF == aBuf[2]))
+        case '\xEF':
+          if (('\xBB' == aBuf[1]) && ('\xBF' == aBuf[2]))
             // EF BB BF  UTF-8 encoded BOM
             mDetectedCharset = "UTF-8";
         break;
-        case 0xFE:
-          if ((0xFF == aBuf[1]) && (0x00 == aBuf[2]) && (0x00 == aBuf[3]))
+        case '\xFE':
+          if (('\xFF' == aBuf[1]) && ('\x00' == aBuf[2]) && ('\x00' == aBuf[3]))
             // FE FF 00 00  UCS-4, unusual octet order BOM (3412)
             mDetectedCharset = "X-ISO-10646-UCS-4-3412";
-          else if (0xFF == aBuf[1])
+          else if ('\xFF' == aBuf[1])
             // FE FF  UTF-16, big endian BOM
             mDetectedCharset = "UTF-16BE";
         break;
-        case 0x00:
-          if ((0x00 == aBuf[1]) && (0xFE == aBuf[2]) && (0xFF == aBuf[3]))
+        case '\x00':
+          if (('\x00' == aBuf[1]) && ('\xFE' == aBuf[2]) && ('\xFF' == aBuf[3]))
             // 00 00 FE FF  UTF-32, big-endian BOM
             mDetectedCharset = "UTF-32BE";
-          else if ((0x00 == aBuf[1]) && (0xFF == aBuf[2]) && (0xFE == aBuf[3]))
+          else if (('\x00' == aBuf[1]) && ('\xFF' == aBuf[2]) && ('\xFE' == aBuf[3]))
             // 00 00 FF FE  UCS-4, unusual octet order BOM (2143)
             mDetectedCharset = "X-ISO-10646-UCS-4-2143";
         break;
-        case 0xFF:
-          if ((0xFE == aBuf[1]) && (0x00 == aBuf[2]) && (0x00 == aBuf[3]))
+        case '\xFF':
+          if (('\xFE' == aBuf[1]) && ('\x00' == aBuf[2]) && ('\x00' == aBuf[3]))
             // FF FE 00 00  UTF-32, little-endian BOM
             mDetectedCharset = "UTF-32LE";
-          else if (0xFE == aBuf[1])
+          else if ('\xFE' == aBuf[1])
             // FF FE  UTF-16, little endian BOM
             mDetectedCharset = "UTF-16LE";
         break;
@@ -167,7 +167,7 @@ void nsUniversalDetector::HandleData(const char* aBuf, PRUint32 aLen)
   for (i = 0; i < aLen; i++)
   {
     //other than 0xa0, if every othe character is ascii, the page is ascii
-    if (aBuf[i] & 0x80 && aBuf[i] != (char)0xA0)  //Since many Ascii only page contains NBSP 
+    if (aBuf[i] & '\x80' && aBuf[i] != '\xA0')  //Since many Ascii only page contains NBSP 
     {
       //we got a non-ascii byte (high-byte)
       if (mInputState != eHighbyte)