I have some code in C++ that uses an std::vector of std::strings to store an array of strings. I need to convert it into C. I thought that I would just create c versions of the functions I need (vector.back,vector.push_back,string.operator+=) but am getting lost in the double pointers. Can anybody lead me on the right track here?
std::vector and std::string do a lot of work internally. You'd probably be better off converting the 'what' instead of the 'how'. Ask yourself what the code is trying to accomplish and write C code to do it.
It's not all that difficult to do. Here's an example of push_back
const int BlockSize = 10; // allocate this number of elements at one time
int MaxArraySize = 0; // initial size of the array
int CurrentSize = 0; // current number of elements used in the array
char** array = 0;
MaxArraySize += BlockSize;
array = realloc(array,MaxArraySize);
char* push_back(const char* item)
if( (CurrentSize+1) >= MaxArraySize )
array[CurrentSize] = malloc(strlen(item)+1);