Improve -Tascii output for Unicode escape sequences: For the first 512

code points, provide ASCII approximations.  This is already much better
than what groff does, which prints nothing for most code points.

A few minor fixes while here:
* Handle Unicode escape sequences in the ASCII range.
* In case of errors, use the REPLACEMENT CHARACTER U+FFFD for -Tutf8
and the string "<?>" for -Tascii output.
* Handle all one-character escape sequences in mchars_spec2{cp,str}()
and remove the workarounds on the higher level.

1 files changed, 2 insertions, 0 deletions

diff --git a/term.h b/term.h
index 17c0e974..644292cd 100644
--- a/term.h
+++ b/term.h
@@ -104,6 +104,8 @@ struct	termp {
 	struct termp_ps	 *ps;
 };
 
+const char	 *ascii_uc2str(int);
+
 void		  term_eqn(struct termp *, const struct eqn *);
 void		  term_tbl(struct termp *, const struct tbl_span *);
 void		  term_free(struct termp *);