Converting between Unicode and UTF8

Introduction

EscapeUtils escape encodes and decodes unsafe data in URI. It also supports converting of Unicode data (16-bit descriptor) into UTF8 data (8-bit descriptor) and vice-versa.

Procedure

Converting to UTF8

EscapeUtils::ConvertFromUnicodeToUtf8L() converts the Unicode data into UTF8 format.

       
        
       
       _LIT16(KUnicode, "Unicode string"); //data to be converted
    
HBufC8* utf8  = EscapeUtils::ConvertFromUnicodeToUtf8L(KUnicode);
      

utf8 contains the UTF8 form of the string.

Converting to Unicode

EscapeUtils::ConvertToUnicodeFromUtf8L() converts the data from UTF8 format to Unicode.

       
        
       
       _LIT8(KUtf8, "UTF-8 string"); // UTF8 string to be converted
    
HBufC16* unicode = EscapeUtils::ConvertToUnicodeFromUtf8L(KUtf8); // convert the srting to Unicode
      

unicode contains the Unicode form of the string.

Call EscapeUtils::IsEscapeTriple to check if the input data contains an escape triple. For example, %2a . If there is a triple, its value is calculated and returned through the output argument HexVal . If there is no escape triple, then this argument is left unchanged.

       
        
       
       _LIT(KEscapeTriple1, "%2a"); // input data containing escape triple
TInt KEscapeTriple1_value = 0x2a;
TInt HexVal;
EscapeUtils::IsEscapeTriple(KEscapeTriple1,HexVal); // escape triple value
//variable HexVal contains value 0x2a
      

The code above returns '42' , the value of escape triple.