/*-*- 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; };