c++ - Serialize/deserialize unsigned char -

i'm working on api embedded device, , need display image generated (by api). screen attached device allows me render bitmaps, data stored unsigned char image[] = { 0b00000000, 0b00001111, 0b11111110... }.

what easiest way deserialize string in whatever format needed?

my approach create stringstream, separate comma , push vector<char>. however, function render bitmaps accept char, , can find online seems quite difficult convert it. ideally, i'd rather not use vector @ all, including adds several kbs project, limited in size both download speed of embedded device (firmware transferred edge) , onboard storage.

from comments, sounds want convert string composed of series of "0b00000000" style literals, comma separated, array of actual values. way to:

1. get number of bytes in image (i assume known string length?).
2. create std::vector of unsigned char hold results.
3. for each byte in input, construct std::bitset string value, , actual value.

here's code example. since have said you'd rather not use vector have used c-style arrays , strings:

#include <bitset> #include <cstring> #include <iostream> #include <memory>  int main() {     auto input = "0b00000000,0b00001111,0b11111111";     auto length = strlen(input);      // number of bytes string length. each byte takes 10 chars     // plus comma separator.     int size = (length + 1) / 11;      // allocate memory hold result.     std::unique_ptr<unsigned char[]> bytes(new unsigned char[size]);      // populate each byte individually.     (int = 0; < size; ++i) {         // create bitset. stride 11, , skip first 2 characters         // skip 0b prefix.         std::bitset<8> bitset(input + 2 + * 11, 8);          // store resulting byte.         bytes[i] = bitset.to_ulong();     }      // loop on each byte, , output confirm result.     (int = 0; < size; ++i) {         std::cout << "0b" << std::bitset<8>(bytes[i]) << std::endl;     } }