de/d17/strxfrm_8c_source.html

 #include <string.h>

 size_t strxfrm(char* restrict dest, const char* restrict src, size_t n)
 {
     size_t l = strlen(src);
     if(n > l)
     {
         strcpy(dest, src);
     }

     return l;
 }
string.h

strlen
size_t strlen(const char *str)
Returns the length of the given null-terminated byte string.
Definition: strlen.c:77

strxfrm
size_t strxfrm(char *restrict dest, const char *restrict src, size_t n)
Definition: strxfrm.c:3

strcpy
char * strcpy(char *__restrict dst, const char *__restrict src)
Copies the null-terminated byte string pointed to by src to the character array whose first element i...
Definition: strcpy.c:26