Import ncurses-5.2-20010512 onto the vendor branch

Obtained from: ftp://dickey.his.com/ncurses/

1 files changed, 216 insertions, 94 deletions

diff --git a/contrib/ncurses/ANNOUNCE b/contrib/ncurses/ANNOUNCE
index 5ef8f3c2f963..7b5f4efa69ae 100644
--- a/contrib/ncurses/ANNOUNCE
+++ b/contrib/ncurses/ANNOUNCE
@@ -1,5 +1,5 @@
 
-                            Announcing ncurses 5.1
+                            Announcing ncurses 5.2
 
    The ncurses (new curses) library is a free software emulation of
    curses in System V Release 4.0, and more. It uses terminfo format,
@@ -27,102 +27,224 @@
 
                                  Release Notes
 
-   This release is designed to be upward compatible from ncurses 5.0;
-   very few applications will require recompilation, depending on the
-   platform. These are the highlights from the change-log since ncurses
-   5.0 release.
+   This release is designed to be upward compatible from ncurses 5.0 and
+   5.1; very few applications will require recompilation, depending on
+   the platform. These are the highlights from the change-log since
+   ncurses 5.1 release.
 
    Interface changes:
-     * made the extended terminal capabilities
-       (configure --enable-tcap-names) a standard feature (though the
-       configure script can disable it, it is built by default).
-     * removed the trace() function and related trace support from the
-       production library. This is the only interface change that may
-       cause problems with existing applications linked to shared
-       libraries, since not all platforms use the minor version number.
-     * explicitly initialized to zero several data items which were
-       implicitly initialized, e.g., cur_term. If not explicitly
-       initialized, their storage type is C (common), and causes problems
-       linking on some platforms.
-     * modified curses.h.in, undef'ing some symbols to avoid conflict
-       with C++ STL.
-
-   New features:
-     * added a new extension, assume_default_colors() to provide better
-       control over the use of default colors. This is the principal
-       visible difference between ncurses 5.1 and preceding versions. The
-       new extension allows an application to specify what colors pair 0
-       uses.
-       NOTE: Pair 0 defaults to white on black unless you have invoked
-       use_default_colors() or set it via assume_default_colors(). An
-       application that calls start_colors() without setting the
-       background color will consistently have a black background no
-       matter what color your terminal's background actually is.
-     * made several fixes to the terminfo-to-termcap conversion, and have
-       been using the generated termcaps without further hand-tuning.
-       This builds on the extension use_extended_names() by adding
-       "obsolete" termcap strings to terminfo.src
-          + modified tic so that if extended names (i.e.,
-            configure --enable-tcap-names) are active, then tic -x will
-            also write "obsolete" capabilities that are present in the
-            terminfo source.
-          + added screen's AX capability (for ECMA SGR 39 and 49) to
-            applicable terminfo entries, use presence of this as a check
-            for a small improvement in setting default colors.
-          + add -a option to tic and infocmp, which retains commented-out
-            capabilities during source translation/comparison, e.g.,
-            captoinfo and infotocap.
-     * implemented limited support for UTF-8, useful with XFree86 xterm:
-          + if the configure --enable-widec option is given, append 'w'
-            to names of the generated libraries (e.g., libncursesw.so) to
-            avoid conflict with existing ncurses libraries.
-          + add a simple UTF-8 output driver to the experimental
-            wide-character support. If any of the environment variables
-            LC_ALL, LC_CTYPE or LANG contain the string "UTF-8", this
-            driver will be used to translate the output to UTF-8.
-          + modified view.c to make a rudimentary viewer of UTF-8 text.
-     * modify raw() and noraw() to clear/restore IEXTEN flag which
-       affects stty lnext on systems such as FreeBSD
-     * reordered tests during mouse initialization to allow for gpm to
-       run in xterm, or for xterm to be used under OS/2 EMX. Also dropped
-       test for $DISPLAY in favor of the terminfo capability kmous=\E[M
-       or if $TERM environment variable contains "xterm".
-     * added configure option --with-manpage-symlinks, which provides for
-       fully indexing manpage entries by making symbolic links for the
-       aliases.
-     * changed unctrl() to render C1 characters (128-159) as ~@, ~A, etc.
-     * add experimental configure option --enable-colorfgbg to check for
-       $COLORTERM variable as set by rxvt/aterm/Eterm.
-     * made the infocmp -F option less verbose.
-     * dropped support for gnat 3.10 (gnat 3.12 is current).
+     * change type of ospeed variable back to short to match its use in
+       legacy applications. It was altered after ncurses 4.2 to speed_t
+       to repair a type mismatch which was introduced after 1.9.4 in
+       1995. The principal users of termcap continued to use short, which
+       is not the same size.
+       NOTE: A few applications will have to be recompiled (about 1% of
+       the programs in a typical Linux distribution, 10% of the programs
+       that use ncurses). These are easy to identify with nm or strings.
+     * remove a private function _nc_can_clear_with(), which was built
+       with the configure --enable-expanded option but not used.
+     * add several private functions (prefixed with "_nc_") for tracing
+       chtype values in the debug library, and for better access and
+       buffer limit checking.
+
+   New features and improvements:
+     * rewrote tgoto() to make it better support existing termcap
+       applications which use hardcoded strings rather than obtain all of
+       their information from the termcap file. If the string does not
+       appear to be a terminfo string (i.e., does not refer to a "%p"
+       parameter, or terminfo-style padding), and termcap support is
+       configured, tgoto() will interpret it as termcap. Otherwise, as
+       before, it will use tparm().
+     * to ensure that the tgoto() changes work properly, added checks to
+       tic which report capabilities that do not reference the expected
+       number of parameters.
+     * new configure script options:
+          + option --disable-root-environ adds runtime checks which tell
+            ncurses to disregard $TERMINFO and similar environment
+            variables if the current user is root, or running
+            setuid/setgid.
+          + option --disable-assumed-color allows you to use the pre-5.1
+            convention of default colors used for color-pair 0 to be
+            configured (see assume_default_colors()).
+          + implement configure script options that transform installed
+            program names, e.g., --program-prefix, including the manpage
+            names and cross references.
+          + option --with-database allows you to specify a different
+            terminfo source-file to install. On OS/2 EMX, the default is
+            misc/emx.src, otherwise misc/terminfo.src
+          + option --with-default-terminfo-dir allows you to specify the
+            default terminfo database directory.
+          + option --with-libtool allows you to build with libtool.
+            NOTE: libtool uses a different notation for numbering shared
+            library versions from the existing ncurses configuration.
+          + option --with-manpage-tbl causes the manpages to be
+            preprocessed by tbl(1) prior to installation,
+          + option --without-curses-h causes the installation process to
+            install curses.h as ncurses.h and make appropriate changes to
+            headers and manpages.
+     * modified configure script options:
+          + change symbol used by the --install-prefix configure option
+            from INSTALL_PREFIX to DESTDIR (the latter has become common
+            usage although the name is misleading).
+          + modify ld -rpath options (e.g., Linux, and Solaris) to use an
+            absolute pathname for the build tree's lib directory,
+            avoiding confusion with directories relative to the current
+            one with the installed programs.
+          + modified misc/run_tic.in to use tic -o, to eliminate
+            dependency on $TERMINFO variable for installs.
+     * terminfo database:
+          + updated xterm terminfo entries to match XFree86 xterm patch
+            #146.
+          + added amiga-vnc, Matrix Orbital, and QNX qansi to
+            misc/terminfo.src.
+          + added os2 entry to misc/emx.src.
+          + add S0 and E0 extensions to screen's terminfo entry since
+            otherwise the FreeBSD port makes it pass termcap equivalents
+            to tgoto, which would be misinterpreted by older versions of
+            ncurses.
+     * improvements to program usability:
+          + modify programs to use curses_version() string to report the
+            version of ncurses with which they are compiled rather than
+            the NCURSES_VERSION string. The function returns the patch
+            level in addition to the major and minor version numbers.
+          + modify tput program so it can be renamed or invoked via a
+            link as 'reset' or 'init', producing the same effect as
+            tput reset or tput init.
+          + add error checking to infocmp's -v and -m options to ensure
+            that the option value is indeed a number.
+     * improved performance:
+          + replace a lookup table in lib_vidattr.c used to decode
+            no_color_video with a logic expression which is faster.
 
    Major bug fixes:
-     * modified infocmp -e, -E options to ensure that generated
-       fallback.c type for Booleans agrees with term.h
-     * documented a special case of incompatiblity between ncurses 4.2
-       and 5.0, added a section for this in INSTALL.
-     * corrected tests for file-descriptors in OS/2 EMX mouse support. A
-       negative value could be used by FD_SET, causing the select() call
-       to wait indefinitely.
-     * made 'tput flash' work properly for xterm by flushing output in
-       delay_output() when using napms(), and modifying xterm's terminfo
-       to specify no padding character. Otherwise, xterm's reported baud
-       rate could mislead ncurses into producing too few padding
-       characters.
-     * modified lib_addch.c to allow repeated update to the lower-right
-       corner, rather than displaying only the first character written
-       until the cursor is moved. Recent versions of SVr4 curses can
-       update the lower-right corner, and behave this way.
-     * modified echo() behavior of getch() to match Solaris curses for
-       carriage return and backspace (reported by Neil Zanella).
-     * corrected offsets used for subwindows in wresize()
-     * modified configure script so AC_MSG_ERROR is temporarily defined
-       to a warning in AC_PROG_CXX to make it recover from a missing C++
-       compiler without requiring user to add --without-cxx option
-     * corrected logic in lib_twait.c as used by lib_mouse.c for GPM
-       mouse support when poll() is used rather than select().
-     * made several fixes for buffer overflows, unchecked recursion,
-       improvements in performance, etc. See the NEWS file for details.
+     * correct manlinks.sed script introduced in ncurses 5.1 to avoid
+       using ERE "\+", which is not understood by standard versions of
+       sed. This happens to work with GNU sed, but is not portable, and
+       was the initial motivation for this release.
+     * remove "hpux10.*" case from CF_SHARED_OPTS configure script macro.
+       This differed from the "hpux*" case by using reversed symbolic
+       links, which made the 5.1 version not match the configuration of
+       5.0 shared libraries.
+     * guard against corrupt terminfo data:
+          + modify tparm() to disallow arithmetic on strings, analyze the
+            varargs list to read strings as strings and numbers as
+            numbers.
+          + modify tparm()'s internal function spop() to treat a null
+            pointer as an empty string.
+          + modify parse_format() in lib_tparm.c to ignore precision if
+            it is longer than 10000.
+          + rewrote limit checks in lib_mvcur.c using new functions
+            _nc_safe_strcat(), etc. Made other related changes to check
+            lengths used for strcat() and strcpy().
+     * corrections to screen optimization:
+          + added special case in lib_vidattr.c to reset underline and
+            standout for devices that have no sgr0 defined.
+          + change handling of non_dest_scroll_region in tty_update.c to
+            clear text after it is shifted in rather than before shifting
+            out. Also correct row computation.
+          + modify rs2 capability in xterm-r6 and similar entries where
+            cursor save/restore bracketed the sequence for resetting
+            video attributes. The cursor restore would undo that.
+     * UTF-8 support:
+          + when checking LC_ALL, LC_CTYPE, and LANG environment
+            variables for UTF-8 locale, ignore those which are set to an
+            empty value, as per SUSV2.
+          + encode 0xFFFD in UTF-8 with 3 bytes, not 2.
+          + modify _nc_utf8_outch() to avoid sign-extension when checking
+            for out-of-range value.
+     * other library fixes:
+          + added checks for an empty $HOME environment variable, to
+            avoid retrieving terminfo descriptions from ./.terminfo .
+          + change functions _nc_parse_entry() and postprocess_termcap()
+            to avoid using strtok(), because it is non-reentrant.
+          + initialize fds[] array to 0's in _nc_timed_wait(); apparently
+            poll() only sets the revents members of that array when there
+            is activity corresponding to the related file.
+          + add a check for null pointer in Make_Enum_Type().
+          + fix a heap problem with the c++ binding.
+          + correct missing includes for <string.h> in several places,
+            including the C++ binding. This is not noted by gcc unless we
+            use the -fno-builtin option.
+     * several fixes for tic:
+          + add a check for empty buffers returned by fgets() in
+            comp_scan.c next_char() function, in case tic is run on a
+            non-text file (fixes a core dump).
+          + modify tic to verify that its inputs are really files, in
+            case someone tries to read a directory (or /dev/zero).
+          + correct an uninitialized parameter to open_tempfile() in
+            tic.c which made "tic -I" give an ambiguous error message
+            about tmpnam.
+          + correct logic in adjust_cancels(), which did not check both
+            alternatives when reclassifying an extended name between
+            boolean, number and string, causing an infinite loop in tic.
+     * using new checks in tic for parameter counts in capability
+       strings, found/fixed several errors both in the terminfo database
+       and in the include/Caps file.
+          + modified several terminfo capability strings, including the
+            definitions for setaf, setab, in include/Caps to indicate
+            that the entries are parameterized. This information is used
+            to tell which strings are translated when converting to
+            termcap. This fixes a problem where the generated termcap
+            would contain a spurious "%p1" for the terminfo "%p1%d".
+          + correct parameter counts in include/Caps for dclk as well as
+            some printer-specific capabilities: csnm, defc, scs, scsd,
+            smgtp, smglp.
+     * various fixes for install scripts used to support configure
+       --srcdir and --with-install-prefix.
+     * correct several mismatches between manpage filename and ".TH"
+       directives, renaming dft_fgbg.3x to default_colors.3x and
+       menu_attribs.3x to menu_attributes.3x.
+
+   Portability:
+     * configure script:
+          + newer config.guess, config.sub, including changes to support
+            OS/2 EMX. The configure script for OS/2 EMX still relies on a
+            patch since there is no (working) support for that platform
+            in the main autoconf distribution.
+          + make configure script checks on variables $GCC and $GXX
+            consistently compare against 'yes' rather than test if they
+            are nonnull, since either may be set to the corresponding
+            name of the C or C++ compiler.
+          + change configure script to use AC_CANONICAL_SYSTEM rather
+            than AC_CANONICAL_HOST, which means that configure --target
+            will set a default program-prefix.
+          + modify the check for big-core to force a couple of memory
+            accesses, which may work as needed for older/less-capable
+            machines (if not, there's still the explicit configure
+            option).
+          + modify configure test for tcgetattr() to allow for old
+            implementations, e.g., on BeOS, which only defined it as a
+            macro.
+          + add configure check for filesystems (such as OS/2 EMX) which
+            do not distinguish between upper/lowercase filenames, use
+            this to fix tags rules in makefiles.
+          + add MKncurses_def.sh to generate fallback definitions for
+            ncurses_cfg.h, to quiet gcc -Wundef warnings, modified
+            ifdef's in code to consistently use "#if" rather than
+            "#ifdef".
+          + change most remaining unquoted parameters of test in
+            configure script to use quotes, for instance fixing a problem
+            in the --disable-database option.
+          + modify scripts so that "make install.data" works on OS/2 EMX.
+          + modify scripts and makefiles so the Ada95 directory builds on
+            OS/2 EMX.
+     * library:
+          + replaced case-statement in _nc_tracebits() for CSIZE with a
+            table to simplify working around implementations that define
+            random combinations of the related macros to zero.
+          + improved OS/2 mouse support by retrying as a 2-button mouse
+            if code fails to set up a 3-button mouse.
+          + added private entrypoint _nc_basename(), used to consolidate
+            related code in progs, as well as accommodating OS/2 EMX
+            pathnames.
+          + alter definition of NCURSES_CONST to make it non-empty.
+          + redefine 'TEXT' in menu.h for AMIGA, since it is reported to
+            have an (unspecified) symbol conflict.
+     * programs:
+          + modified progs/tset.c and tack/sysdep.c to build with sgttyb
+            interface if neither termio or termios is available. Tested
+            this with FreeBSD 2.1.5 (which does have termios - but the
+            sgttyb does work).
 
                               Features of Ncurses
 
@@ -344,7 +466,7 @@ References
    5. http://dickey.his.com/ded/ded.html
    6. http://dickey.his.com/dialog/dialog.html
    7. http://lynx.isc.org/release/
-   8. file://localhost/usr/build/ncurses/ncurses-5.1-20000704/doc/html/www.gnome.org/mc/
+   8. file://localhost/usr/build/ncurses/ncurses-5.2-20001021/doc/html/www.gnome.org/mc/
    9. http://www.mutt.org/
   10. http://www.ncftp.com/
   11. http://www.bostic.com/vi/