Conditionalize a few more functions (hopefully fixing the build)

terminfo: Add guards to optionally build parts of libterminfo

Reading from a database is now optional.
Compiling terminfo descriptions (including from $TERMINFO) is now optional.
Compat support is n

terminfo: Add guards to optionally build parts of libterminfo

Reading from a database is now optional.
Compiling terminfo descriptions (including from $TERMINFO) is now optional.
Compat support is now optional.

This removes 17k on amd64 from the binary size, which allows it to be used
again on space constrained ramdisks.

show more ...

Introduce a bunch of inline functions and utilities to avoid code duplication.

As described in tech-userlevel:
- Modify the writing code to only write entries in the new
format for the terminal descriptions that require it.
- Store new format entries as <name>@v3
- Store old

As described in tech-userlevel:
- Modify the writing code to only write entries in the new
format for the terminal descriptions that require it.
- Store new format entries as <name>@v3
- Store old format entries with clamped values as <name> for
backwards compatibility
- Lookup first <name>@v3 and then <name> if that is not found.
- Don't create terminfo2 anymore; old programs keep working with
clamped entries, and new programs be able to use the wide
fields with using the original db file.

show more ...

terminfo: promote numeric parameters from short to int

POSIX mandates implementations must support upto a short but may exceed it.
When NetBSD terminfo was implemented, no terminfo description used

terminfo: promote numeric parameters from short to int

POSIX mandates implementations must support upto a short but may exceed it.
When NetBSD terminfo was implemented, no terminfo description used over
a short, but because ncurses has supported ints for some time, some now do.

Infact, such a terminfo description was imported where colour pairs for
screen-256color went up to 65536 which exposed a bug in the existing
implementation where it set to zero. Because the number might mean
something more than a range, we need to be able to store it accurately.

This requires a version bump because whilst the API hasn't changed thanks
to C int promotion, the ABI has. Also the underlying database structure
has changed as well - we now store the numeric paramter inside a uint32_t
field rather than a uint16_t one.
Whilst this change can still read the old style database, the old one
cannot read the new one and thus we now maintain the database as
terminfo2.cdb, leaving the old library and database alone so old programs
still work fine.

libcurses, libfrom, libmenu and libpanel have also been bumped to
accomoate this change.

show more ...

terminfo: if $TERMINFO.cdb doesn't exist, try $TERMINFO

This allows this command sequence to work:
tic -o /tmp/foo foo
TERMINFO=/tmp/foo TERM=foo infocmp

Improve the scope of some variables.

Remove ticcmp and extend _ti_checkname so it can be used instead.

Fix prior for multiple terminfo aliases.

Instead of poking in the binary blob to work out if this is our terminal,
assume it is and load it.
Once loaded then check it's really for us.
This allows us to work out if the indexed alias entry is

Instead of poking in the binary blob to work out if this is our terminal,
assume it is and load it.
Once loaded then check it's really for us.
This allows us to work out if the indexed alias entry is correct we
this was not checked previously.

show more ...

Don't bother allocating space for the database name, just print
directly to the static buffer storage.

Move pathbuf into the function where it's actually used.

Clean up some compile warnings.

Whitespace, fit in 80 and extra braces for readability.
No functional change.

off-by-one in memcpy. Found by ASAN (Carsten Kunze)
XXX: pullup 7.

Always copy the area buffer, even when the length was the same
(from Rin Okuyama)

From PR/50092:
- handle calling _ti_readterm with an existing initialized terminal
- simplify free code
Also:
- fix an inconsistency in userdefs count computation

Whitespace

Relax consistency to make it possible to match valid entries.

Switch terminfo(3) to cdb(5).

Use memcmp in place of strncmp, since length is known to no longer than
either of the arguments.

Remove _ti_freeterm as consumers should just use del_curterm.

Clean up some compile warnings

Implement captoinfo so that we can convert $TERMCAP into $TERMINFO.
We don't currently map %> %B %D.
That means no conversion for regent100, hz1500, act4, act5, mime terms.

libterminfo can now compile a single terminfo description which allows
$TERMINFO to be a terminfo description as well as a file reference.

This enables the user to modify the terminfo description on

libterminfo can now compile a single terminfo description which allows
$TERMINFO to be a terminfo description as well as a file reference.

This enables the user to modify the terminfo description on read-only
media.

show more ...