Rcpp hexdump

rcpp_hexdump.cpp

#include <Rcpp.h>

using namespace Rcpp;

// [[Rcpp::export]]
std::vector<std::string> rcpp_hello_world(std::vector<std::string> strings) {
  for(std::vector<std::string>::iterator s_it = strings.begin(); s_it != strings.end(); ++s_it) {
    std::vector<unsigned char> c((*s_it).begin(), (*s_it).end());
    
    int length = c.size();
    for (int i = 0; i < length; i++){      
      // Japanese characters are 3 byte length;
      if( (length - i > 2) && 
          (c[i] == 0xEF)   &&
          (c[i+1] == 0xBC) &&
          (c[i+2] >= 0x90)  &&
          (c[i+2] <= 0x99) ) {
        c[i] = c[i+2] - 0x60;
        c.erase( c.begin() + i + 1, c.begin() + i + 3 );
      }
    }
    (*s_it) = std::string(c.begin(), c.end());
  }
  return strings;
}