Question

Here’s my function call:

removeTags(*buf, bufSize);

which calls:

void removeTags(char* dataBlock, unsigned long size) 
{
    char* start = dataBlock; 
    char* end = dataBlock + size;

    while(start < end)
    {
    //How do I replace the characters "\abc" with just nothing, ''.
        }

I want to replace any instances of the characters \abc with nothing.

Answer 1

Once you find an instance of \abc simply move all the characters after the \abc backwards four places (four because \abc is four chars long) (possibly using memmove).

For instance:

one two \abc three
        <----^ copy everything from the 't' down backwards over the \abc

Note that after you do that, your end pointer will be invalidated so you’ll have to update it.

Finding the position of a string within another string can be done with strstr for const char*s or std::string::find for std::strings. Of course, if you’re using std::string, then you could just use std::string::replace.