How do I search and replace a character in a string

[abdul]

let us say, I have a string:

\folder\file.html

How do I search the all the caracters "\" and replace then with "\\" SO I get a string like this:

\\folder\\file.html


I know it is straightforward for you guys!

[parksie]

bool StringFind(string sSearchIn, string sSearchFor, uint &nPos) {
	uint nTemp = sSearchIn.find(sSearchFor);
	if(nTemp < sSearchIn.length()) {
		nPos = nTemp;
		return true;
	}

	return false;
}

bool Replace(string &sLine, string sReplaceWhat, string sReplaceWith) {
	uint nPos = 0;
	uint i = 0;
	while (StringFind(sLine, sReplaceWhat, nPos)) {
		sLine = sLine.replace(nPos, sReplaceWhat.length(), sReplaceWith);
		i++;
	}
	if(i) return true; return false;
}

Then just use:

string x = "c:\\filename\\path.ext"
Replace(x, "\\", "\\\\");

Not sure why you'd want to do this though PS: "\\" is actually only "\" because \ is an escape character.

[abdul]

Actually, when you are working with the directories, you divide the directories with "\\" right?

But I get the response from the client with the directories divided with "\". So I want to convert "\" to "\\"

[parksie]

No. Path separators are always '\'. But you have to type \\ in the source code because the preprocessor (or is it the compiler? can't remember...) uses '\' as an escape character. Therefore to include it in a literal string you need to use '\\'.

[abdul]

Sorry for this late post

But,then, how do I know if a file exists or not? I have tried the following code but whenever I type the wrong address in the browser, the compiler gives me an assertion error message.

This code should redirect the client to error.html page if the address is wrong. But if the file exists that it should use the given file.

d=recv(wparam,aa,1000,0);
						abc(aa);
                        p=aa + 4;
                        e=0;
                        while(*p!=32)
                        {
                                if (*p=='/')
                                {
                                        buf[e]='\\'; 
                                }
                                else 
                                        buf[e]=*p;
                                if(buf[e]=='.')
									fn=1;
                                p++;
                                e++;
                        }

						buf[e] = 0;

                        if (strlen(buf)==1)
                                strcpy(filename,"c:\\website\\woo\\index.html");
                        else
						{

								strcpy(filename,"c:\\website");

								strcpy(checkfilename, filename);
								strcat(checkfilename, buf);

								if(access(filename, 0) == -1){
									strcpy(filename,"c:\\website\\woo\\error.html");
									}
								else{MessageBox(NULL, checkfilename, "DF",MB_OK);
									strcat(filename,buf);
									}
							
						if(fn==0)

							{
								strcat(filename,"index.html");
							}

                        }
                                abc(filename);
                        
		
                        fp=fopen(filename,"rb");
                        fseek(fp,0,2);
                        size=ftell(fp);
 
                        strcpy(header,"HTTP/1.0 200 ok \r\n");
 
                        sprintf(bb,"Content-Length:%ld\r\n\r\n",size);
                        strcat(header,bb);
                        send(wparam,header,strlen(header),0);
                        pp= (char*)GlobalAlloc(GPTR, size);
                        fseek(fp,0,0);
                        fread(pp,size,1,fp);
                        send(wparam,pp,size,0);
                        closesocket(wparam);
						GlobalFree(pp);

Can you please check what is wrong in there again. All the variables are declared first