terminal: drop unfinished code

This drops the libsystemd-terminal and systemd-consoled code for various
reasons:

 * It's been sitting there unfinished for over a year now and won't get
   finished any time soon.

 * Since its initial creation, several parts need significant rework: The
   input handling should be replaced with the now commonly used libinput,
   the drm accessors should coordinate the handling of mode-object
   hotplugging (including split connectors) with other DRM users, and the
   internal library users should be converted to sd-device and friends.

 * There is still significant kernel work required before sd-console is
   really useful. This includes, but is not limited to, simpledrm and
   drmlog.

 * The authority daemon is needed before all this code can be used for
   real. And this will definitely take a lot more time to get done as
   no-one else is currently working on this, but me.

 * kdbus maintenance has taken up way more time than I thought and it has
   much higher priority. I don't see me spending much time on the
   terminal code in the near future.

If anyone intends to hack on this, please feel free to contact me. I'll
gladly help you out with any issues. Once kdbus and authorityd are
finished (whenever that will be..) I'll definitely pick this up again. But
until then, lets reduce compile times and maintenance efforts on this code
and drop it for now.

1 files changed, 0 insertions, 650 deletions

diff --git a/src/libsystemd-terminal/term-internal.h b/src/libsystemd-terminal/term-internal.h
deleted file mode 100644
index 8c6a00188c..0000000000
--- a/src/libsystemd-terminal/term-internal.h
+++ /dev/null
@@ -1,650 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#pragma once
-
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include "term.h"
-#include "util.h"
-
-typedef struct term_char term_char_t;
-typedef struct term_charbuf term_charbuf_t;
-
-typedef struct term_cell term_cell;
-typedef struct term_line term_line;
-
-typedef struct term_page term_page;
-typedef struct term_history term_history;
-
-typedef uint32_t term_charset[96];
-typedef struct term_state term_state;
-
-/*
- * Miscellaneous
- * Sundry things and external helpers.
- */
-
-int mk_wcwidth(wchar_t ucs4);
-int mk_wcwidth_cjk(wchar_t ucs4);
-int mk_wcswidth(const wchar_t *str, size_t len);
-int mk_wcswidth_cjk(const wchar_t *str, size_t len);
-
-/*
- * Characters
- * Each cell in a terminal page contains only a single character. This is
- * usually a single UCS-4 value. However, Unicode allows combining-characters,
- * therefore, the number of UCS-4 characters per cell must be unlimited. The
- * term_char_t object wraps the internal combining char API so it can be
- * treated as a single object.
- */
-
-struct term_char {
-        /* never access this value directly */
-        uint64_t _value;
-};
-
-struct term_charbuf {
-        /* 3 bytes + zero-terminator */
-        uint32_t buf[4];
-};
-
-#define TERM_CHAR_INIT(_val) ((term_char_t){ ._value = (_val) })
-#define TERM_CHAR_NULL TERM_CHAR_INIT(0)
-
-term_char_t term_char_set(term_char_t previous, uint32_t append_ucs4);
-term_char_t term_char_merge(term_char_t base, uint32_t append_ucs4);
-term_char_t term_char_dup(term_char_t ch);
-term_char_t term_char_dup_append(term_char_t base, uint32_t append_ucs4);
-
-const uint32_t *term_char_resolve(term_char_t ch, size_t *s, term_charbuf_t *b);
-unsigned int term_char_lookup_width(term_char_t ch);
-
-/* true if @ch is TERM_CHAR_NULL, otherwise false */
-static inline bool term_char_is_null(term_char_t ch) {
-        return ch._value == 0;
-}
-
-/* true if @ch is dynamically allocated and needs to be freed */
-static inline bool term_char_is_allocated(term_char_t ch) {
-        return !term_char_is_null(ch) && !(ch._value & 0x1);
-}
-
-/* true if (a == b), otherwise false; this is (a == b), NOT (*a == *b) */
-static inline bool term_char_same(term_char_t a, term_char_t b) {
-        return a._value == b._value;
-}
-
-/* true if (*a == *b), otherwise false; this is implied by (a == b) */
-static inline bool term_char_equal(term_char_t a, term_char_t b) {
-        const uint32_t *sa, *sb;
-        term_charbuf_t ca, cb;
-        size_t na, nb;
-
-        sa = term_char_resolve(a, &na, &ca);
-        sb = term_char_resolve(b, &nb, &cb);
-        return na == nb && !memcmp(sa, sb, sizeof(*sa) * na);
-}
-
-/* free @ch in case it is dynamically allocated */
-static inline term_char_t term_char_free(term_char_t ch) {
-        if (term_char_is_allocated(ch))
-                term_char_set(ch, 0);
-
-        return TERM_CHAR_NULL;
-}
-
-/* gcc _cleanup_ helpers */
-#define _term_char_free_ _cleanup_(term_char_freep)
-static inline void term_char_freep(term_char_t *p) {
-        term_char_free(*p);
-}
-
-/*
- * Cells
- * The term_cell structure respresents a single cell in a terminal page. It
- * contains the stored character, the age of the cell and all its attributes.
- */
-
-struct term_cell {
-        term_char_t ch;         /* stored char or TERM_CHAR_NULL */
-        term_age_t age;         /* cell age or TERM_AGE_NULL */
-        term_attr attr;         /* cell attributes */
-        unsigned int cwidth;    /* cached term_char_lookup_width(cell->ch) */
-};
-
-/*
- * Lines
- * Instead of storing cells in a 2D array, we store them in an array of
- * dynamically allocated lines. This way, scrolling can be implemented very
- * fast without moving any cells at all. Similarly, the scrollback-buffer is
- * much simpler to implement.
- * We use term_line to store a single line. It contains an array of cells, a
- * fill-state which remembers the amount of blanks on the right side, a
- * separate age just for the line which can overwrite the age for all cells,
- * and some management data.
- */
-
-struct term_line {
-        term_line *lines_next;          /* linked-list for histories */
-        term_line *lines_prev;          /* linked-list for histories */
-
-        unsigned int width;             /* visible width of line */
-        unsigned int n_cells;           /* # of allocated cells */
-        term_cell *cells;               /* cell-array */
-
-        term_age_t age;                 /* line age */
-        unsigned int fill;              /* # of valid cells; starting left */
-};
-
-int term_line_new(term_line **out);
-term_line *term_line_free(term_line *line);
-
-#define _term_line_free_ _cleanup_(term_line_freep)
-DEFINE_TRIVIAL_CLEANUP_FUNC(term_line*, term_line_free);
-
-int term_line_reserve(term_line *line, unsigned int width, const term_attr *attr, term_age_t age, unsigned int protect_width);
-void term_line_set_width(term_line *line, unsigned int width);
-void term_line_write(term_line *line, unsigned int pos_x, term_char_t ch, unsigned int cwidth, const term_attr *attr, term_age_t age, bool insert_mode);
-void term_line_insert(term_line *line, unsigned int from, unsigned int num, const term_attr *attr, term_age_t age);
-void term_line_delete(term_line *line, unsigned int from, unsigned int num, const term_attr *attr, term_age_t age);
-void term_line_append_combchar(term_line *line, unsigned int pos_x, uint32_t ucs4, term_age_t age);
-void term_line_erase(term_line *line, unsigned int from, unsigned int num, const term_attr *attr, term_age_t age, bool keep_protected);
-void term_line_reset(term_line *line, const term_attr *attr, term_age_t age);
-
-void term_line_link(term_line *line, term_line **first, term_line **last);
-void term_line_link_tail(term_line *line, term_line **first, term_line **last);
-void term_line_unlink(term_line *line, term_line **first, term_line **last);
-
-#define TERM_LINE_LINK(_line, _head) term_line_link((_line), &(_head)->lines_first, &(_head)->lines_last)
-#define TERM_LINE_LINK_TAIL(_line, _head) term_line_link_tail((_line), &(_head)->lines_first, &(_head)->lines_last)
-#define TERM_LINE_UNLINK(_line, _head) term_line_unlink((_line), &(_head)->lines_first, &(_head)->lines_last)
-
-/*
- * Pages
- * A page represents the 2D table containing all cells of a terminal. It stores
- * lines as an array of pointers so scrolling becomes a simple line-shuffle
- * operation.
- * Scrolling is always targeted only at the scroll-region defined via scroll_idx
- * and scroll_num. The fill-state keeps track of the number of touched lines in
- * the scroll-region. @width and @height describe the visible region of the page
- * and are guaranteed to be allocated at all times.
- */
-
-struct term_page {
-        term_age_t age;                 /* page age */
-
-        term_line **lines;              /* array of line-pointers */
-        term_line **line_cache;         /* cache for temporary operations */
-        unsigned int n_lines;           /* # of allocated lines */
-
-        unsigned int width;             /* width of visible area */
-        unsigned int height;            /* height of visible area */
-        unsigned int scroll_idx;        /* scrolling-region start index */
-        unsigned int scroll_num;        /* scrolling-region length in lines */
-        unsigned int scroll_fill;       /* # of valid scroll-lines */
-};
-
-int term_page_new(term_page **out);
-term_page *term_page_free(term_page *page);
-
-#define _term_page_free_ _cleanup_(term_page_freep)
-DEFINE_TRIVIAL_CLEANUP_FUNC(term_page*, term_page_free);
-
-term_cell *term_page_get_cell(term_page *page, unsigned int x, unsigned int y);
-
-int term_page_reserve(term_page *page, unsigned int cols, unsigned int rows, const term_attr *attr, term_age_t age);
-void term_page_resize(term_page *page, unsigned int cols, unsigned int rows, const term_attr *attr, term_age_t age, term_history *history);
-void term_page_write(term_page *page, unsigned int pos_x, unsigned int pos_y, term_char_t ch, unsigned int cwidth, const term_attr *attr, term_age_t age, bool insert_mode);
-void term_page_insert_cells(term_page *page, unsigned int from_x, unsigned int from_y, unsigned int num, const term_attr *attr, term_age_t age);
-void term_page_delete_cells(term_page *page, unsigned int from_x, unsigned int from_y, unsigned int num, const term_attr *attr, term_age_t age);
-void term_page_append_combchar(term_page *page, unsigned int pos_x, unsigned int pos_y, uint32_t ucs4, term_age_t age);
-void term_page_erase(term_page *page, unsigned int from_x, unsigned int from_y, unsigned int to_x, unsigned int to_y, const term_attr *attr, term_age_t age, bool keep_protected);
-void term_page_reset(term_page *page, const term_attr *attr, term_age_t age);
-
-void term_page_set_scroll_region(term_page *page, unsigned int idx, unsigned int num);
-void term_page_scroll_up(term_page *page, unsigned int num, const term_attr *attr, term_age_t age, term_history *history);
-void term_page_scroll_down(term_page *page, unsigned int num, const term_attr *attr, term_age_t age, term_history *history);
-void term_page_insert_lines(term_page *page, unsigned int pos_y, unsigned int num, const term_attr *attr, term_age_t age);
-void term_page_delete_lines(term_page *page, unsigned int pos_y, unsigned int num, const term_attr *attr, term_age_t age);
-
-/*
- * Histories
- * Scroll-back buffers use term_history objects to store scroll-back lines. A
- * page is independent of the history used. All page operations that modify a
- * history take it as separate argument. You're free to pass NULL at all times
- * if no history should be used.
- * Lines are stored in a linked list as no complex operations are ever done on
- * history lines, besides pushing/poping. Note that history lines do not have a
- * guaranteed minimum length. Any kind of line might be stored there. Missing
- * cells should be cleared to the background color.
- */
-
-struct term_history {
-        term_line *lines_first;
-        term_line *lines_last;
-        unsigned int n_lines;
-        unsigned int max_lines;
-};
-
-int term_history_new(term_history **out);
-term_history *term_history_free(term_history *history);
-
-#define _term_history_free_ _cleanup_(term_history_freep)
-DEFINE_TRIVIAL_CLEANUP_FUNC(term_history*, term_history_free);
-
-void term_history_clear(term_history *history);
-void term_history_trim(term_history *history, unsigned int max);
-void term_history_push(term_history *history, term_line *line);
-term_line *term_history_pop(term_history *history, unsigned int reserve_width, const term_attr *attr, term_age_t age);
-unsigned int term_history_peek(term_history *history, unsigned int max, unsigned int reserve_width, const term_attr *attr, term_age_t age);
-
-/*
- * Parsers
- * The term_parser object parses control-sequences for both host and terminal
- * side. Based on this parser, there is a set of command-parsers that take a
- * term_seq sequence and returns the command it represents. This is different
- * for host and terminal side so a different set of parsers is provided.
- */
-
-enum {
-        TERM_SEQ_NONE,                  /* placeholder, no sequence parsed */
-
-        TERM_SEQ_IGNORE,                /* no-op character */
-        TERM_SEQ_GRAPHIC,               /* graphic character */
-        TERM_SEQ_CONTROL,               /* control character */
-        TERM_SEQ_ESCAPE,                /* escape sequence */
-        TERM_SEQ_CSI,                   /* control sequence function */
-        TERM_SEQ_DCS,                   /* device control string */
-        TERM_SEQ_OSC,                   /* operating system control */
-
-        TERM_SEQ_CNT
-};
-
-enum {
-        /* these must be kept compatible to (1U << (ch - 0x20)) */
-
-        TERM_SEQ_FLAG_SPACE             = (1U <<  0),   /* char:   */
-        TERM_SEQ_FLAG_BANG              = (1U <<  1),   /* char: ! */
-        TERM_SEQ_FLAG_DQUOTE            = (1U <<  2),   /* char: " */
-        TERM_SEQ_FLAG_HASH              = (1U <<  3),   /* char: # */
-        TERM_SEQ_FLAG_CASH              = (1U <<  4),   /* char: $ */
-        TERM_SEQ_FLAG_PERCENT           = (1U <<  5),   /* char: % */
-        TERM_SEQ_FLAG_AND               = (1U <<  6),   /* char: & */
-        TERM_SEQ_FLAG_SQUOTE            = (1U <<  7),   /* char: ' */
-        TERM_SEQ_FLAG_POPEN             = (1U <<  8),   /* char: ( */
-        TERM_SEQ_FLAG_PCLOSE            = (1U <<  9),   /* char: ) */
-        TERM_SEQ_FLAG_MULT              = (1U << 10),   /* char: * */
-        TERM_SEQ_FLAG_PLUS              = (1U << 11),   /* char: + */
-        TERM_SEQ_FLAG_COMMA             = (1U << 12),   /* char: , */
-        TERM_SEQ_FLAG_MINUS             = (1U << 13),   /* char: - */
-        TERM_SEQ_FLAG_DOT               = (1U << 14),   /* char: . */
-        TERM_SEQ_FLAG_SLASH             = (1U << 15),   /* char: / */
-
-        /* 16-35 is reserved for numbers; unused */
-
-        /* COLON is reserved            = (1U << 26),      char: : */
-        /* SEMICOLON is reserved        = (1U << 27),      char: ; */
-        TERM_SEQ_FLAG_LT                = (1U << 28),   /* char: < */
-        TERM_SEQ_FLAG_EQUAL             = (1U << 29),   /* char: = */
-        TERM_SEQ_FLAG_GT                = (1U << 30),   /* char: > */
-        TERM_SEQ_FLAG_WHAT              = (1U << 31),   /* char: ? */
-};
-
-enum {
-        TERM_CMD_NONE,                          /* placeholder */
-        TERM_CMD_GRAPHIC,                       /* graphics character */
-
-        TERM_CMD_BEL,                           /* bell */
-        TERM_CMD_BS,                            /* backspace */
-        TERM_CMD_CBT,                           /* cursor-backward-tabulation */
-        TERM_CMD_CHA,                           /* cursor-horizontal-absolute */
-        TERM_CMD_CHT,                           /* cursor-horizontal-forward-tabulation */
-        TERM_CMD_CNL,                           /* cursor-next-line */
-        TERM_CMD_CPL,                           /* cursor-previous-line */
-        TERM_CMD_CR,                            /* carriage-return */
-        TERM_CMD_CUB,                           /* cursor-backward */
-        TERM_CMD_CUD,                           /* cursor-down */
-        TERM_CMD_CUF,                           /* cursor-forward */
-        TERM_CMD_CUP,                           /* cursor-position */
-        TERM_CMD_CUU,                           /* cursor-up */
-        TERM_CMD_DA1,                           /* primary-device-attributes */
-        TERM_CMD_DA2,                           /* secondary-device-attributes */
-        TERM_CMD_DA3,                           /* tertiary-device-attributes */
-        TERM_CMD_DC1,                           /* device-control-1 or XON */
-        TERM_CMD_DC3,                           /* device-control-3 or XOFF */
-        TERM_CMD_DCH,                           /* delete-character */
-        TERM_CMD_DECALN,                        /* screen-alignment-pattern */
-        TERM_CMD_DECANM,                        /* ansi-mode */
-        TERM_CMD_DECBI,                         /* back-index */
-        TERM_CMD_DECCARA,                       /* change-attributes-in-rectangular-area */
-        TERM_CMD_DECCRA,                        /* copy-rectangular-area */
-        TERM_CMD_DECDC,                         /* delete-column */
-        TERM_CMD_DECDHL_BH,                     /* double-width-double-height-line: bottom half */
-        TERM_CMD_DECDHL_TH,                     /* double-width-double-height-line: top half */
-        TERM_CMD_DECDWL,                        /* double-width-single-height-line */
-        TERM_CMD_DECEFR,                        /* enable-filter-rectangle */
-        TERM_CMD_DECELF,                        /* enable-local-functions */
-        TERM_CMD_DECELR,                        /* enable-locator-reporting */
-        TERM_CMD_DECERA,                        /* erase-rectangular-area */
-        TERM_CMD_DECFI,                         /* forward-index */
-        TERM_CMD_DECFRA,                        /* fill-rectangular-area */
-        TERM_CMD_DECIC,                         /* insert-column */
-        TERM_CMD_DECID,                         /* return-terminal-id */
-        TERM_CMD_DECINVM,                       /* invoke-macro */
-        TERM_CMD_DECKBD,                        /* keyboard-language-selection */
-        TERM_CMD_DECKPAM,                       /* keypad-application-mode */
-        TERM_CMD_DECKPNM,                       /* keypad-numeric-mode */
-        TERM_CMD_DECLFKC,                       /* local-function-key-control */
-        TERM_CMD_DECLL,                         /* load-leds */
-        TERM_CMD_DECLTOD,                       /* load-time-of-day */
-        TERM_CMD_DECPCTERM,                     /* pcterm-mode */
-        TERM_CMD_DECPKA,                        /* program-key-action */
-        TERM_CMD_DECPKFMR,                      /* program-key-free-memory-report */
-        TERM_CMD_DECRARA,                       /* reverse-attributes-in-rectangular-area */
-        TERM_CMD_DECRC,                         /* restore-cursor */
-        TERM_CMD_DECREQTPARM,                   /* request-terminal-parameters */
-        TERM_CMD_DECRPKT,                       /* report-key-type */
-        TERM_CMD_DECRQCRA,                      /* request-checksum-of-rectangular-area */
-        TERM_CMD_DECRQDE,                       /* request-display-extent */
-        TERM_CMD_DECRQKT,                       /* request-key-type */
-        TERM_CMD_DECRQLP,                       /* request-locator-position */
-        TERM_CMD_DECRQM_ANSI,                   /* request-mode-ansi */
-        TERM_CMD_DECRQM_DEC,                    /* request-mode-dec */
-        TERM_CMD_DECRQPKFM,                     /* request-program-key-free-memory */
-        TERM_CMD_DECRQPSR,                      /* request-presentation-state-report */
-        TERM_CMD_DECRQTSR,                      /* request-terminal-state-report */
-        TERM_CMD_DECRQUPSS,                     /* request-user-preferred-supplemental-set */
-        TERM_CMD_DECSACE,                       /* select-attribute-change-extent */
-        TERM_CMD_DECSASD,                       /* select-active-status-display */
-        TERM_CMD_DECSC,                         /* save-cursor */
-        TERM_CMD_DECSCA,                        /* select-character-protection-attribute */
-        TERM_CMD_DECSCL,                        /* select-conformance-level */
-        TERM_CMD_DECSCP,                        /* select-communication-port */
-        TERM_CMD_DECSCPP,                       /* select-columns-per-page */
-        TERM_CMD_DECSCS,                        /* select-communication-speed */
-        TERM_CMD_DECSCUSR,                      /* set-cursor-style */
-        TERM_CMD_DECSDDT,                       /* select-disconnect-delay-time */
-        TERM_CMD_DECSDPT,                       /* select-digital-printed-data-type */
-        TERM_CMD_DECSED,                        /* selective-erase-in-display */
-        TERM_CMD_DECSEL,                        /* selective-erase-in-line */
-        TERM_CMD_DECSERA,                       /* selective-erase-rectangular-area */
-        TERM_CMD_DECSFC,                        /* select-flow-control */
-        TERM_CMD_DECSKCV,                       /* set-key-click-volume */
-        TERM_CMD_DECSLCK,                       /* set-lock-key-style */
-        TERM_CMD_DECSLE,                        /* select-locator-events */
-        TERM_CMD_DECSLPP,                       /* set-lines-per-page */
-        TERM_CMD_DECSLRM_OR_SC,                 /* set-left-and-right-margins or save-cursor */
-        TERM_CMD_DECSMBV,                       /* set-margin-bell-volume */
-        TERM_CMD_DECSMKR,                       /* select-modifier-key-reporting */
-        TERM_CMD_DECSNLS,                       /* set-lines-per-screen */
-        TERM_CMD_DECSPP,                        /* set-port-parameter */
-        TERM_CMD_DECSPPCS,                      /* select-pro-printer-character-set */
-        TERM_CMD_DECSPRTT,                      /* select-printer-type */
-        TERM_CMD_DECSR,                         /* secure-reset */
-        TERM_CMD_DECSRFR,                       /* select-refresh-rate */
-        TERM_CMD_DECSSCLS,                      /* set-scroll-speed */
-        TERM_CMD_DECSSDT,                       /* select-status-display-line-type */
-        TERM_CMD_DECSSL,                        /* select-setup-language */
-        TERM_CMD_DECST8C,                       /* set-tab-at-every-8-columns */
-        TERM_CMD_DECSTBM,                       /* set-top-and-bottom-margins */
-        TERM_CMD_DECSTR,                        /* soft-terminal-reset */
-        TERM_CMD_DECSTRL,                       /* set-transmit-rate-limit */
-        TERM_CMD_DECSWBV,                       /* set-warning-bell-volume */
-        TERM_CMD_DECSWL,                        /* single-width-single-height-line */
-        TERM_CMD_DECTID,                        /* select-terminal-id */
-        TERM_CMD_DECTME,                        /* terminal-mode-emulation */
-        TERM_CMD_DECTST,                        /* invoke-confidence-test */
-        TERM_CMD_DL,                            /* delete-line */
-        TERM_CMD_DSR_ANSI,                      /* device-status-report-ansi */
-        TERM_CMD_DSR_DEC,                       /* device-status-report-dec */
-        TERM_CMD_ECH,                           /* erase-character */
-        TERM_CMD_ED,                            /* erase-in-display */
-        TERM_CMD_EL,                            /* erase-in-line */
-        TERM_CMD_ENQ,                           /* enquiry */
-        TERM_CMD_EPA,                           /* end-of-guarded-area */
-        TERM_CMD_FF,                            /* form-feed */
-        TERM_CMD_HPA,                           /* horizontal-position-absolute */
-        TERM_CMD_HPR,                           /* horizontal-position-relative */
-        TERM_CMD_HT,                            /* horizontal-tab */
-        TERM_CMD_HTS,                           /* horizontal-tab-set */
-        TERM_CMD_HVP,                           /* horizontal-and-vertical-position */
-        TERM_CMD_ICH,                           /* insert-character */
-        TERM_CMD_IL,                            /* insert-line */
-        TERM_CMD_IND,                           /* index */
-        TERM_CMD_LF,                            /* line-feed */
-        TERM_CMD_LS1R,                          /* locking-shift-1-right */
-        TERM_CMD_LS2,                           /* locking-shift-2 */
-        TERM_CMD_LS2R,                          /* locking-shift-2-right */
-        TERM_CMD_LS3,                           /* locking-shift-3 */
-        TERM_CMD_LS3R,                          /* locking-shift-3-right */
-        TERM_CMD_MC_ANSI,                       /* media-copy-ansi */
-        TERM_CMD_MC_DEC,                        /* media-copy-dec */
-        TERM_CMD_NEL,                           /* next-line */
-        TERM_CMD_NP,                            /* next-page */
-        TERM_CMD_NULL,                          /* null */
-        TERM_CMD_PP,                            /* preceding-page */
-        TERM_CMD_PPA,                           /* page-position-absolute */
-        TERM_CMD_PPB,                           /* page-position-backward */
-        TERM_CMD_PPR,                           /* page-position-relative */
-        TERM_CMD_RC,                            /* restore-cursor */
-        TERM_CMD_REP,                           /* repeat */
-        TERM_CMD_RI,                            /* reverse-index */
-        TERM_CMD_RIS,                           /* reset-to-initial-state */
-        TERM_CMD_RM_ANSI,                       /* reset-mode-ansi */
-        TERM_CMD_RM_DEC,                        /* reset-mode-dec */
-        TERM_CMD_S7C1T,                         /* set-7bit-c1-terminal */
-        TERM_CMD_S8C1T,                         /* set-8bit-c1-terminal */
-        TERM_CMD_SCS,                           /* select-character-set */
-        TERM_CMD_SD,                            /* scroll-down */
-        TERM_CMD_SGR,                           /* select-graphics-rendition */
-        TERM_CMD_SI,                            /* shift-in */
-        TERM_CMD_SM_ANSI,                       /* set-mode-ansi */
-        TERM_CMD_SM_DEC,                        /* set-mode-dec */
-        TERM_CMD_SO,                            /* shift-out */
-        TERM_CMD_SPA,                           /* start-of-protected-area */
-        TERM_CMD_SS2,                           /* single-shift-2 */
-        TERM_CMD_SS3,                           /* single-shift-3 */
-        TERM_CMD_ST,                            /* string-terminator */
-        TERM_CMD_SU,                            /* scroll-up */
-        TERM_CMD_SUB,                           /* substitute */
-        TERM_CMD_TBC,                           /* tab-clear */
-        TERM_CMD_VPA,                           /* vertical-line-position-absolute */
-        TERM_CMD_VPR,                           /* vertical-line-position-relative */
-        TERM_CMD_VT,                            /* vertical-tab */
-        TERM_CMD_XTERM_CLLHP,                   /* xterm-cursor-lower-left-hp-bugfix */
-        TERM_CMD_XTERM_IHMT,                    /* xterm-initiate-highlight-mouse-tracking */
-        TERM_CMD_XTERM_MLHP,                    /* xterm-memory-lock-hp-bugfix */
-        TERM_CMD_XTERM_MUHP,                    /* xterm-memory-unlock-hp-bugfix */
-        TERM_CMD_XTERM_RPM,                     /* xterm-restore-private-mode */
-        TERM_CMD_XTERM_RRV,                     /* xterm-reset-resource-value */
-        TERM_CMD_XTERM_RTM,                     /* xterm-reset-title-mode */
-        TERM_CMD_XTERM_SACL1,                   /* xterm-set-ansi-conformance-level-1 */
-        TERM_CMD_XTERM_SACL2,                   /* xterm-set-ansi-conformance-level-2 */
-        TERM_CMD_XTERM_SACL3,                   /* xterm-set-ansi-conformance-level-3 */
-        TERM_CMD_XTERM_SDCS,                    /* xterm-set-default-character-set */
-        TERM_CMD_XTERM_SGFX,                    /* xterm-sixel-graphics */
-        TERM_CMD_XTERM_SPM,                     /* xterm-set-private-mode */
-        TERM_CMD_XTERM_SRV,                     /* xterm-set-resource-value */
-        TERM_CMD_XTERM_STM,                     /* xterm-set-title-mode */
-        TERM_CMD_XTERM_SUCS,                    /* xterm-set-utf8-character-set */
-        TERM_CMD_XTERM_WM,                      /* xterm-window-management */
-
-        TERM_CMD_CNT
-};
-
-enum {
-        /*
-         * Charsets: DEC marks charsets according to "Digital Equ. Corp.".
-         *           NRCS marks charsets according to the "National Replacement
-         *           Character Sets". ISO marks charsets according to ISO-8859.
-         * The USERDEF charset is special and can be modified by the host.
-         */
-
-        TERM_CHARSET_NONE,
-
-        /* 96-compat charsets */
-        TERM_CHARSET_ISO_LATIN1_SUPPLEMENTAL,
-        TERM_CHARSET_BRITISH_NRCS = TERM_CHARSET_ISO_LATIN1_SUPPLEMENTAL,
-        TERM_CHARSET_ISO_LATIN2_SUPPLEMENTAL,
-        TERM_CHARSET_AMERICAN_NRCS = TERM_CHARSET_ISO_LATIN2_SUPPLEMENTAL,
-        TERM_CHARSET_ISO_LATIN5_SUPPLEMENTAL,
-        TERM_CHARSET_ISO_GREEK_SUPPLEMENTAL,
-        TERM_CHARSET_ISO_HEBREW_SUPPLEMENTAL,
-        TERM_CHARSET_ISO_LATIN_CYRILLIC,
-
-        TERM_CHARSET_96_CNT,
-
-        /* 94-compat charsets */
-        TERM_CHARSET_DEC_SPECIAL_GRAPHIC = TERM_CHARSET_96_CNT,
-        TERM_CHARSET_DEC_SUPPLEMENTAL,
-        TERM_CHARSET_DEC_TECHNICAL,
-        TERM_CHARSET_CYRILLIC_DEC,
-        TERM_CHARSET_DUTCH_NRCS,
-        TERM_CHARSET_FINNISH_NRCS,
-        TERM_CHARSET_FRENCH_NRCS,
-        TERM_CHARSET_FRENCH_CANADIAN_NRCS,
-        TERM_CHARSET_GERMAN_NRCS,
-        TERM_CHARSET_GREEK_DEC,
-        TERM_CHARSET_GREEK_NRCS,
-        TERM_CHARSET_HEBREW_DEC,
-        TERM_CHARSET_HEBREW_NRCS,
-        TERM_CHARSET_ITALIAN_NRCS,
-        TERM_CHARSET_NORWEGIAN_DANISH_NRCS,
-        TERM_CHARSET_PORTUGUESE_NRCS,
-        TERM_CHARSET_RUSSIAN_NRCS,
-        TERM_CHARSET_SCS_NRCS,
-        TERM_CHARSET_SPANISH_NRCS,
-        TERM_CHARSET_SWEDISH_NRCS,
-        TERM_CHARSET_SWISS_NRCS,
-        TERM_CHARSET_TURKISH_DEC,
-        TERM_CHARSET_TURKISH_NRCS,
-
-        TERM_CHARSET_94_CNT,
-
-        /* special charsets */
-        TERM_CHARSET_USERPREF_SUPPLEMENTAL = TERM_CHARSET_94_CNT,
-
-        TERM_CHARSET_CNT,
-};
-
-extern term_charset term_unicode_lower;
-extern term_charset term_unicode_upper;
-extern term_charset term_dec_supplemental_graphics;
-extern term_charset term_dec_special_graphics;
-
-#define TERM_PARSER_ARG_MAX (16)
-#define TERM_PARSER_ST_MAX (4096)
-
-struct term_seq {
-        unsigned int type;
-        unsigned int command;
-        uint32_t terminator;
-        unsigned int intermediates;
-        unsigned int charset;
-        unsigned int n_args;
-        int args[TERM_PARSER_ARG_MAX];
-        unsigned int n_st;
-        char *st;
-};
-
-struct term_parser {
-        term_seq seq;
-        size_t st_alloc;
-        unsigned int state;
-
-        bool is_host : 1;
-};
-
-/*
- * Screens
- * A term_screen object represents the terminal-side of the communication. It
- * connects the term-parser and term-pages and handles all required commands.
- * All state is managed by it.
- */
-
-enum {
-        TERM_FLAG_7BIT_MODE                     = (1U << 0),    /* 7bit mode (default: on) */
-        TERM_FLAG_HIDE_CURSOR                   = (1U << 1),    /* hide cursor caret (default: off) */
-        TERM_FLAG_INHIBIT_TPARM                 = (1U << 2),    /* do not send TPARM unrequested (default: off) */
-        TERM_FLAG_NEWLINE_MODE                  = (1U << 3),    /* perform carriage-return on line-feeds (default: off) */
-        TERM_FLAG_PENDING_WRAP                  = (1U << 4),    /* wrap-around is pending */
-        TERM_FLAG_KEYPAD_MODE                   = (1U << 5),    /* application-keypad mode (default: off) */
-        TERM_FLAG_CURSOR_KEYS                   = (1U << 6),    /* enable application cursor-keys (default: off) */
-};
-
-enum {
-        TERM_CONFORMANCE_LEVEL_VT52,
-        TERM_CONFORMANCE_LEVEL_VT100,
-        TERM_CONFORMANCE_LEVEL_VT400,
-        TERM_CONFORMANCE_LEVEL_CNT,
-};
-
-struct term_state {
-        unsigned int cursor_x;
-        unsigned int cursor_y;
-        term_attr attr;
-        term_charset **gl;
-        term_charset **gr;
-        term_charset **glt;
-        term_charset **grt;
-
-        bool auto_wrap : 1;
-        bool origin_mode : 1;
-};
-
-struct term_screen {
-        unsigned long ref;
-        term_age_t age;
-
-        term_page *page;
-        term_page *page_main;
-        term_page *page_alt;
-        term_history *history;
-        term_history *history_main;
-
-        unsigned int n_tabs;
-        uint8_t *tabs;
-
-        term_utf8 utf8;
-        term_parser *parser;
-
-        term_screen_write_fn write_fn;
-        void *write_fn_data;
-        term_screen_cmd_fn cmd_fn;
-        void *cmd_fn_data;
-
-        unsigned int flags;
-        unsigned int conformance_level;
-        term_attr default_attr;
-
-        term_charset *g0;
-        term_charset *g1;
-        term_charset *g2;
-        term_charset *g3;
-
-        char *answerback;
-
-        term_state state;
-        term_state saved;
-        term_state saved_alt;
-};