rb_econv_open     308 include/ruby/encoding.h rb_econv_t *rb_econv_open(const char *source_encoding, const char *destination_encoding, int ecflags);
rb_econv_open    1537 transcode.c        ec = rb_econv_open(sname, dname, 0);
rb_econv_open    2589 transcode.c        ec = rb_econv_open(source_encoding, destination_encoding, ecflags);
rb_econv_open     305 win32/file.c   	rb_econv_t *ec = rb_econv_open("UTF-8", rb_enc_name(path_encoding), replaceflags);