gistfile1.cpp

/*static*/ String CJSONEntry::quoteValue(const String& strValue)
{
    int pos = 0, start_offset = 0;
    unsigned char c;
    String strRes = "\"";
    const char* str = strValue.c_str();
    do 
    {
        c = str[pos];
        switch(c) {
        case '\0':
            break;
        case '\b':
        case '\n':
        case '\r':
        case '\t':
        case '"':
        case '\\':
        case '/':
            if(pos - start_offset > 0)
                strRes.append(str + start_offset, pos - start_offset);

            if(c == '\b') strRes.append( "\\b", 2 );
            else if(c == '\n') strRes.append( "\\n", 2);
            else if(c == '\r') strRes.append( "\\r", 2);
            else if(c == '\t') strRes.append( "\\t", 2);
            else if(c == '"') strRes.append( "\\\"", 2);
            else if(c == '\\') strRes.append( "\\\\", 2);
            else if(c == '/') strRes.append( "\\/", 2);

            start_offset = ++pos;
            break;
        default:
            if(c < ' ') 
            {
                if(pos - start_offset > 0)
                    strRes.append( str + start_offset, pos - start_offset);

                char buf[128];
                int nSize = snprintf(buf, 128, "\\u00%c%c", json_hex_chars[c >> 4], json_hex_chars[c & 0xf]);
                strRes.append(buf, nSize);

                start_offset = ++pos;
            }else 
                pos++;
        }
    } while(c);

    if ( strRes.length() == 1 )
        return "\"" + strValue + "\"";

    if ( pos - start_offset > 0 )
        strRes.append( str + start_offset, pos - start_offset);

    strRes.append("\"");
    return strRes;
}