1 #include "mystring.h"

     2 

     3 int mystring::find_last(char ch, size_t offset) const

     4 {

     5   if(offset == (size_t)-1)

     6     offset = rep->length-1;

     7   const char* ptr = rep->buf + offset;

     8   while(ptr >= rep->buf) {

     9     if(*ptr == ch)

    10       return ptr - rep->buf;

    11     --ptr;

    12   }

    13   return -1;

    14 }