str_as_unibyte    572 src/character.h extern ptrdiff_t str_as_unibyte (unsigned char *, ptrdiff_t);
str_as_unibyte   1409 src/fns.c            ptrdiff_t bytes = str_as_unibyte (str, SBYTES (string));
str_as_unibyte   3401 src/lread.c          nchars = str_as_unibyte ((unsigned char *) read_buffer,