stroperation.cpp

跨操作系统的微型中间件

	
	return 0;
}

void CStrOperate::TransPathFormat(string& strPath)
{
	for(int i=0; i<strPath.length(); i++)
	{
		if(strPath.at(i) == kBadPathDelimiterChar)
			strPath.at(i) = kPathDelimiterChar;
	}

	string tmp = kPathDelimiterString;
	tmp += kPathDelimiterString;

	//去除重复多余的分隔符
	Int32 Pos;
	while((Pos=strPath.find(tmp)) >= 0)
	{
		strPath.erase(Pos, 1);
	}
}

void CStrOperate::TransPathToStdFormat(string& strPath)
{
	for(int i=0; i<strPath.length(); i++)
	{
		if(strPath.at(i) == kNotStdPathDelimiterChar)
			strPath.at(i) = kStdPathDelimiterChar;
	}
	
	string tmp = kStdPathDelimiterStr;
	tmp += kStdPathDelimiterStr;
	
	//去除重复多余的分隔符
	Int32 Pos;
	while((Pos=strPath.find(tmp)) >= 0)
	{
		strPath.erase(Pos, 1);
	}
}

Int32 CStrOperate::DecodeURL(const char* inSrc, Int32 inSrcLen, char* ioDest, Int32 inDestLen)
{
    // return the number of chars written to ioDest
    // or OS_BadURLFormat in the case of any error.
    
    // inSrcLen must be > inSrcLen and the first character must be a '/'
   // if ( inSrcLen <= 0  || *inSrc != '/' )
   if ( inSrcLen <= 0)
        return OS_BadURLFormat;
        
    //Assert(*inSrc == '/'); //For the purposes of '..' stripping, we assume first char is a /
    
    Int32 theLengthWritten = 0;
    int tempChar = 0;
    int numDotChars = 0;
    Bool inQuery = FALSE; 
    
    while (inSrcLen > 0)
    {
        if (theLengthWritten == inDestLen)
            return OS_NotEnoughSpace;
            
        if (*inSrc == '?')
            inQuery = TRUE;

        if (*inSrc == '%')
        {
            if (inSrcLen < 3)
                return OS_BadURLFormat;

            //if there is a special character in this URL, extract it
            char tempbuff[3];
            inSrc++;
            if (!isxdigit(*inSrc))
                return OS_BadURLFormat;
            tempbuff[0] = *inSrc;
            inSrc++;
            if (!isxdigit(*inSrc))
                return OS_BadURLFormat;
            tempbuff[1] = *inSrc;
            inSrc++;
            tempbuff[2] = '\0';
            sscanf(tempbuff, "%x", &tempChar);
            Assert(tempChar < 256);
            inSrcLen -= 3;      
        }
        else if (*inSrc == '\0')
            return OS_BadURLFormat;
        else
        {
            // Any normal character just gets copied into the destination buffer
            tempChar = *inSrc;
            inSrcLen--;
            inSrc++;
        }
        
        if (!inQuery)       // don't do seperator parsing or .. parsing in query
        {
            //
            // If we are in a file system that uses a character besides '/' as a
            // path delimiter, we should not allow this character to appear in the URL.
            // In URLs, only '/' has control meaning.
            if ((tempChar == kPathDelimiterChar) && (kPathDelimiterChar != '/'))
                return OS_BadURLFormat;
            
            // Check to see if this character is a path delimiter ('/')
            // If so, we need to further check whether backup is required due to
            // dot chars that need to be stripped
            if ((tempChar == '/') && (numDotChars <= 2) && (numDotChars > 0))
            {
                Assert(theLengthWritten > numDotChars);
                ioDest -= (numDotChars + 1);
                theLengthWritten -= (numDotChars + 1);
            }

            *ioDest = tempChar;
            
            // Note that because we are doing this dotchar check here, we catch dotchars
            // even if they were encoded to begin with.
            
            // If this is a . , check to see if it's one of those cases where we need to track
            // how many '.'s in a row we've gotten, for stripping out later on
            if (*ioDest == '.')
            {
                Assert(theLengthWritten > 0);//first char is always '/', right?
                if ((numDotChars == 0) && (*(ioDest - 1) == '/'))
                    numDotChars++;
                else if ((numDotChars > 0) && (*(ioDest - 1) == '.'))
                    numDotChars++;
            }
            // If this isn't a dot char, we don't care at all, reset this value to 0.
            else
                numDotChars = 0;
        }
        else
            *ioDest = tempChar;

        theLengthWritten++;
        ioDest++;
    }
    
    // Before returning, "strip" any trailing "." or ".." by adjusting "theLengthWritten
    // accordingly
    if (numDotChars <= 2)
        theLengthWritten -= numDotChars;
    return theLengthWritten;
}

Int32 CStrOperate::EncodeURL(const char* inSrc, Int32 inSrcLen, char* ioDest, Int32 inDestLen)
{
    // return the number of chars written to ioDest
    
    Int32 theLengthWritten = 0;
    
    while (inSrcLen > 0)
    {
        if (theLengthWritten == inDestLen)
            return OS_NotEnoughSpace;
            
        //
        // Always encode 8-bit characters
        if ((unsigned char)*inSrc > 127)
        {
            if (inDestLen - theLengthWritten < 3)
                return OS_NotEnoughSpace;
                
            sprintf(ioDest,"%%%X",(unsigned char)*inSrc);
            ioDest += 3;
            theLengthWritten += 3;
                        inSrc++;
                        inSrcLen--;
            continue;
        }
        
        //
        // Only encode certain 7-bit characters
        switch (*inSrc)
        {
            // This is the URL RFC list of illegal characters.
            case (' '):
            case ('\r'):
            case ('\n'):
            case ('\t'):
            case ('<'):
            case ('>'):
            case ('#'):
            case ('%'):
            case ('{'):
            case ('}'):
            case ('|'):
            case ('\\'):
            case ('^'):
            case ('~'):
            case ('['):
            case (']'):
            case ('`'):
            case (';'):
//          case ('/'):     // this isn't really an illegal character, it's legitimatly used as a seperator in the url
            case ('?'):
            case ('@'):
            case ('='):
            case ('&'):
            case ('$'):
            case ('"'):
            {
                if ((inDestLen - theLengthWritten) < 3)
                    return OS_NotEnoughSpace;
                    
                sprintf(ioDest,"%%%X",(int)*inSrc);
                ioDest += 3;
                theLengthWritten += 3;
                break;
            }
            default:
            {
                *ioDest = *inSrc;
                ioDest++;
                theLengthWritten++;
            }
        }
        
        inSrc++;
        inSrcLen--;
    }
    
    return theLengthWritten;
}

void CStrOperate::DecodePath(char* inSrc, UInt32 inSrcLen)
{
    for (UInt32 x = 0; x < inSrcLen; x++)
        if (inSrc[x] == '/')
            inSrc[x] = kPathDelimiterChar;
}

std::string CStrOperate::GetExtName(const std::string& strFileName)
{
	std::string filename = strFileName;
	
	int nPos = filename.rfind(".");
	nPos += 1;//去除"."
	return filename.substr(nPos, filename.length() - nPos);
}

Int32	CStrOperate::StringToInt(const string &strSrc)
{
	if(strSrc != "")
		return atol(strSrc.c_str());
	else
		return 0;
}

Int64	CStrOperate::StringToInt64(const string &strSrc)
{
	if(strSrc != "")
	{
#ifdef WIN32
		return _atoi64(strSrc.c_str());
#else
		return atoll(strSrc.c_str());
#endif
	}
	else
		return 0;
}

string	CStrOperate::IntToString(Int32 vValue)
{
	char buffer[20];
	sprintf(buffer,"%d",vValue);
	return buffer;
}

string	CStrOperate::UIntToString(UInt32 vValue)
{
	char buffer[20];
	sprintf(buffer,"%u",vValue);
	return buffer;
}

string	CStrOperate::Int64ToString(Int64 vValue)
{
	char buffer[50];
#ifdef WIN32
	sprintf(buffer,"%I64d",vValue);
#else
	sprintf(buffer,"%lld",vValue);
#endif
	return buffer;
}

string	CStrOperate::UInt64ToString(UInt64 vValue)
{
	char buffer[50];
#ifdef WIN32
	sprintf(buffer,"%I64u",vValue);
#else
	sprintf(buffer,"%llu",vValue);
#endif
	return buffer;
}


#if STRINGTRANSLATORTESTING
Bool CStrOperate::Test()
{
    //static char* test1 = "/%5D%3f%7eAveryweird%7C/and/long/path/ya/%5d%3F%7eAveryweird%7C/and/long/p%40/ya/%5D%3F%7EAveryweird%7C/and/long/path/ya/%5D%3F%7EAveryweird%7C/and/long/path/ya/%2560%2526a%20strange%3B%23%3D%25filename"
    static char dest[1000];
    static char* test1 = "/Hello%23%20 I want%28don't%29";
    Int32 err = DecodeURL(test1, strlen(test1), dest, 1000);
    if (err != 22)
        return FALSE;
    if (strcmp(dest, "/Hello#  I want(don't)") != 0)
        return FALSE;
    err = DecodeURL(test1, 15, dest, 1000);
    if (err != 11)
        return FALSE;
    if (strncmp(dest, "/Hello#  I ", 11) != 0)
        return FALSE;
    err = DecodeURL(test1, 50, dest, 1000);
    if (err != OS_BadURLFormat)
        return FALSE;
    if (strncmp(dest, "/Hello#  I want(don't)", 22) != 0)
		if (strcmp(dest, "/Hello#  I want(don't)") != 0)
			return FALSE;
        
		err = DecodeURL(test1, strlen(test1), dest, 20);
		if (err != OS_BadURLFormat)
			return FALSE;
		static char* test2 = "/THis%2h is a bad %28 URL!";
		err = DecodeURL(test2, strlen(test2), dest, 1000);
		if (err != OS_BadURLFormat)
			return FALSE;
        
		static char* test3 = "/...whoa/../is./meeee%3e/./";
		static char* test4 = "/I want/to/sleep/..";
		static char* test5 = "/ve....rr/tire.././../..";
		static char* test6 = "/../beginnings/and/.";
		static char* test7 = "/../begin/%2e./../nin/%2e/gs/an/%2e%2e/fklf/%2e%2e./dfds%2e/%2e%2e/d/.%2e";
		err = DecodeURL(test3, strlen(test3), dest, 1000);
		err = DecodeURL(test4, strlen(test4), dest, 1000);
		err = DecodeURL(test5, strlen(test5), dest, 1000);
		err = DecodeURL(test6, strlen(test6), dest, 1000);
		err = DecodeURL(test7, strlen(test7), dest, 1000);
		return TRUE;
}
#endif