getline.c

BCAST Implementation for NS2

 */
static int gl_copy_find(GetLine *gl, int count, char c, int forward, int onto);

/*
 * Return the line index of the parenthesis that either matches the one under
 * the cursor, or not over a parenthesis character, the index of the next
 * close parenthesis. Return -1 if not found.
 */
static int gl_index_of_matching_paren(GetLine *gl);

/*
 * Replace a malloc'd string (or NULL), with another malloc'd copy of
 * a string (or NULL).
 */
static int gl_record_string(char **sptr, const char *string);

/*
 * Enumerate text display attributes as powers of two, suitable for
 * use in a bit-mask.
 */
typedef enum {
  GL_TXT_STANDOUT=1,   /* Display text highlighted */
  GL_TXT_UNDERLINE=2,  /* Display text underlined */
  GL_TXT_REVERSE=4,    /* Display text with reverse video */
  GL_TXT_BLINK=8,      /* Display blinking text */
  GL_TXT_DIM=16,       /* Display text in a dim font */
  GL_TXT_BOLD=32       /* Display text using a bold font */
} GlTextAttr;

/*
 * Display the prompt regardless of the current visibility mode.
 */
static int gl_display_prompt(GetLine *gl);

/*
 * Return the number of characters used by the prompt on the terminal.
 */
static int gl_displayed_prompt_width(GetLine *gl);

/*
 * Prepare the return the current input line to the caller of gl_get_line().
 */
static int gl_line_ended(GetLine *gl, int newline_char, int archive);

/*
 * Set the maximum length of a line in a user's tecla configuration
 * file (not counting comments).
 */
#define GL_CONF_BUFLEN 100

/*
 * Set the maximum number of arguments supported by individual commands
 * in tecla configuration files.
 */
#define GL_CONF_MAXARG 10

/*
 * Prototype the available action functions.
 */
static KT_KEY_FN(gl_user_interrupt);
static KT_KEY_FN(gl_abort);
static KT_KEY_FN(gl_suspend);
static KT_KEY_FN(gl_stop_output);
static KT_KEY_FN(gl_start_output);
static KT_KEY_FN(gl_literal_next);
static KT_KEY_FN(gl_cursor_left);
static KT_KEY_FN(gl_cursor_right);
static KT_KEY_FN(gl_insert_mode);
static KT_KEY_FN(gl_beginning_of_line);
static KT_KEY_FN(gl_end_of_line);
static KT_KEY_FN(gl_delete_line);
static KT_KEY_FN(gl_kill_line);
static KT_KEY_FN(gl_forward_word);
static KT_KEY_FN(gl_backward_word);
static KT_KEY_FN(gl_forward_delete_char);
static KT_KEY_FN(gl_backward_delete_char);
static KT_KEY_FN(gl_forward_delete_word);
static KT_KEY_FN(gl_backward_delete_word);
static KT_KEY_FN(gl_delete_refind);
static KT_KEY_FN(gl_delete_invert_refind);
static KT_KEY_FN(gl_delete_to_column);
static KT_KEY_FN(gl_delete_to_parenthesis);
static KT_KEY_FN(gl_forward_delete_find);
static KT_KEY_FN(gl_backward_delete_find);
static KT_KEY_FN(gl_forward_delete_to);
static KT_KEY_FN(gl_backward_delete_to);
static KT_KEY_FN(gl_upcase_word);
static KT_KEY_FN(gl_downcase_word);
static KT_KEY_FN(gl_capitalize_word);
static KT_KEY_FN(gl_redisplay);
static KT_KEY_FN(gl_clear_screen);
static KT_KEY_FN(gl_transpose_chars);
static KT_KEY_FN(gl_set_mark);
static KT_KEY_FN(gl_exchange_point_and_mark);
static KT_KEY_FN(gl_kill_region);
static KT_KEY_FN(gl_copy_region_as_kill);
static KT_KEY_FN(gl_yank);
static KT_KEY_FN(gl_up_history);
static KT_KEY_FN(gl_down_history);
static KT_KEY_FN(gl_history_search_backward);
static KT_KEY_FN(gl_history_re_search_backward);
static KT_KEY_FN(gl_history_search_forward);
static KT_KEY_FN(gl_history_re_search_forward);
static KT_KEY_FN(gl_complete_word);
static KT_KEY_FN(gl_expand_filename);
static KT_KEY_FN(gl_del_char_or_list_or_eof);
static KT_KEY_FN(gl_list_or_eof);
static KT_KEY_FN(gl_read_from_file);
static KT_KEY_FN(gl_beginning_of_history);
static KT_KEY_FN(gl_end_of_history);
static KT_KEY_FN(gl_digit_argument);
static KT_KEY_FN(gl_newline);
static KT_KEY_FN(gl_repeat_history);
static KT_KEY_FN(gl_vi_insert);
static KT_KEY_FN(gl_vi_overwrite);
static KT_KEY_FN(gl_change_case);
static KT_KEY_FN(gl_vi_insert_at_bol);
static KT_KEY_FN(gl_vi_append_at_eol);
static KT_KEY_FN(gl_vi_append);
static KT_KEY_FN(gl_list_glob);
static KT_KEY_FN(gl_backward_kill_line);
static KT_KEY_FN(gl_goto_column);
static KT_KEY_FN(gl_forward_to_word);
static KT_KEY_FN(gl_vi_replace_char);
static KT_KEY_FN(gl_vi_change_rest_of_line);
static KT_KEY_FN(gl_vi_change_line);
static KT_KEY_FN(gl_vi_change_to_bol);
static KT_KEY_FN(gl_vi_change_refind);
static KT_KEY_FN(gl_vi_change_invert_refind);
static KT_KEY_FN(gl_vi_change_to_column);
static KT_KEY_FN(gl_vi_change_to_parenthesis);
static KT_KEY_FN(gl_vi_forward_change_word);
static KT_KEY_FN(gl_vi_backward_change_word);
static KT_KEY_FN(gl_vi_forward_change_find);
static KT_KEY_FN(gl_vi_backward_change_find);
static KT_KEY_FN(gl_vi_forward_change_to);
static KT_KEY_FN(gl_vi_backward_change_to);
static KT_KEY_FN(gl_vi_forward_change_char);
static KT_KEY_FN(gl_vi_backward_change_char);
static KT_KEY_FN(gl_forward_copy_char);
static KT_KEY_FN(gl_backward_copy_char);
static KT_KEY_FN(gl_forward_find_char);
static KT_KEY_FN(gl_backward_find_char);
static KT_KEY_FN(gl_forward_to_char);
static KT_KEY_FN(gl_backward_to_char);
static KT_KEY_FN(gl_repeat_find_char);
static KT_KEY_FN(gl_invert_refind_char);
static KT_KEY_FN(gl_append_yank);
static KT_KEY_FN(gl_backward_copy_word);
static KT_KEY_FN(gl_forward_copy_word);
static KT_KEY_FN(gl_copy_to_bol);
static KT_KEY_FN(gl_copy_refind);
static KT_KEY_FN(gl_copy_invert_refind);
static KT_KEY_FN(gl_copy_to_column);
static KT_KEY_FN(gl_copy_to_parenthesis);
static KT_KEY_FN(gl_copy_rest_of_line);
static KT_KEY_FN(gl_copy_line);
static KT_KEY_FN(gl_backward_copy_find);
static KT_KEY_FN(gl_forward_copy_find);
static KT_KEY_FN(gl_backward_copy_to);
static KT_KEY_FN(gl_forward_copy_to);
static KT_KEY_FN(gl_vi_undo);
static KT_KEY_FN(gl_emacs_editing_mode);
static KT_KEY_FN(gl_vi_editing_mode);
static KT_KEY_FN(gl_ring_bell);
static KT_KEY_FN(gl_vi_repeat_change);
static KT_KEY_FN(gl_find_parenthesis);
static KT_KEY_FN(gl_read_init_files);
static KT_KEY_FN(gl_list_history);
static KT_KEY_FN(gl_user_event1);
static KT_KEY_FN(gl_user_event2);
static KT_KEY_FN(gl_user_event3);
static KT_KEY_FN(gl_user_event4);

/*
 * Name the available action functions.
 */
static const struct {const char *name; KT_KEY_FN(*fn);} gl_actions[] = {
  {"user-interrupt",             gl_user_interrupt},
  {"abort",                      gl_abort},
  {"suspend",                    gl_suspend},
  {"stop-output",                gl_stop_output},
  {"start-output",               gl_start_output},
  {"literal-next",               gl_literal_next},
  {"cursor-right",               gl_cursor_right},
  {"cursor-left",                gl_cursor_left},
  {"insert-mode",                gl_insert_mode},
  {"beginning-of-line",          gl_beginning_of_line},
  {"end-of-line",                gl_end_of_line},
  {"delete-line",                gl_delete_line},
  {"kill-line",                  gl_kill_line},
  {"forward-word",               gl_forward_word},
  {"backward-word",              gl_backward_word},
  {"forward-delete-char",        gl_forward_delete_char},
  {"backward-delete-char",       gl_backward_delete_char},
  {"forward-delete-word",        gl_forward_delete_word},
  {"backward-delete-word",       gl_backward_delete_word},
  {"delete-refind",              gl_delete_refind},
  {"delete-invert-refind",       gl_delete_invert_refind},
  {"delete-to-column",           gl_delete_to_column},
  {"delete-to-parenthesis",      gl_delete_to_parenthesis},
  {"forward-delete-find",        gl_forward_delete_find},
  {"backward-delete-find",       gl_backward_delete_find},
  {"forward-delete-to",          gl_forward_delete_to},
  {"backward-delete-to",         gl_backward_delete_to},
  {"upcase-word",                gl_upcase_word},
  {"downcase-word",              gl_downcase_word},
  {"capitalize-word",            gl_capitalize_word},
  {"redisplay",                  gl_redisplay},
  {"clear-screen",               gl_clear_screen},
  {"transpose-chars",            gl_transpose_chars},
  {"set-mark",                   gl_set_mark},
  {"exchange-point-and-mark",    gl_exchange_point_and_mark},
  {"kill-region",                gl_kill_region},
  {"copy-region-as-kill",        gl_copy_region_as_kill},
  {"yank",                       gl_yank},
  {"up-history",                 gl_up_history},
  {"down-history",               gl_down_history},
  {"history-search-backward",    gl_history_search_backward},
  {"history-re-search-backward", gl_history_re_search_backward},
  {"history-search-forward",     gl_history_search_forward},
  {"history-re-search-forward",  gl_history_re_search_forward},
  {"complete-word",              gl_complete_word},
  {"expand-filename",            gl_expand_filename},
  {"del-char-or-list-or-eof",    gl_del_char_or_list_or_eof},
  {"read-from-file",             gl_read_from_file},
  {"beginning-of-history",       gl_beginning_of_history},
  {"end-of-history",             gl_end_of_history},
  {"digit-argument",             gl_digit_argument},
  {"newline",                    gl_newline},
  {"repeat-history",             gl_repeat_history},
  {"vi-insert",                  gl_vi_insert},
  {"vi-overwrite",               gl_vi_overwrite},
  {"vi-insert-at-bol",           gl_vi_insert_at_bol},
  {"vi-append-at-eol",           gl_vi_append_at_eol},
  {"vi-append",                  gl_vi_append},
  {"change-case",                gl_change_case},
  {"list-glob",                  gl_list_glob},
  {"backward-kill-line",         gl_backward_kill_line},
  {"goto-column",                gl_goto_column},
  {"forward-to-word",            gl_forward_to_word},
  {"vi-replace-char",            gl_vi_replace_char},
  {"vi-change-rest-of-line",     gl_vi_change_rest_of_line},
  {"vi-change-line",             gl_vi_change_line},
  {"vi-change-to-bol",           gl_vi_change_to_bol},
  {"vi-change-refind",           gl_vi_change_refind},
  {"vi-change-invert-refind",    gl_vi_change_invert_refind},
  {"vi-change-to-column",        gl_vi_change_to_column},
  {"vi-change-to-parenthesis",   gl_vi_change_to_parenthesis},
  {"forward-copy-char",          gl_forward_copy_char},
  {"backward-copy-char",         gl_backward_copy_char},
  {"forward-find-char",          gl_forward_find_char},
  {"backward-find-char",         gl_backward_find_char},
  {"forward-to-char",            gl_forward_to_char},
  {"backward-to-char",           gl_backward_to_char},
  {"repeat-find-char",           gl_repeat_find_char},
  {"invert-refind-char",         gl_invert_refind_char},
  {"append-yank",                gl_append_yank},
  {"backward-copy-word",         gl_backward_copy_word},
  {"forward-copy-word",          gl_forward_copy_word},
  {"copy-to-bol",                gl_copy_to_bol},
  {"copy-refind",                gl_copy_refind},
  {"copy-invert-refind",         gl_copy_invert_refind},
  {"copy-to-column",             gl_copy_to_column},
  {"copy-to-parenthesis",        gl_copy_to_parenthesis},
  {"copy-rest-of-line",          gl_copy_rest_of_line},
  {"copy-line",                  gl_copy_line},
  {"backward-copy-find",         gl_backward_copy_find},
  {"forward-copy-find",          gl_forward_copy_find},
  {"backward-copy-to",           gl_backward_copy_to},
  {"forward-copy-to",            gl_forward_copy_to},
  {"list-or-eof",                gl_list_or_eof},
  {"vi-undo",                    gl_vi_undo},
  {"vi-backward-change-word",    gl_vi_backward_change_word},
  {"vi-forward-change-word",     gl_vi_forward_change_word},
  {"vi-backward-change-find",    gl_vi_backward_change_find},
  {"vi-forward-change-find",     gl_vi_forward_change_find},
  {"vi-backward-change-to",      gl_vi_backward_change_to},
  {"vi-forward-change-to",       gl_vi_forward_change_to},
  {"vi-backward-change-char",    gl_vi_backward_change_char},
  {"vi-forward-change-char",     gl_vi_forward_change_char},
  {"emacs-mode",                 gl_emacs_editing_mode},
  {"vi-mode",                    gl_vi_editing_mode},
  {"ring-bell",                  gl_ring_bell},
  {"vi-repeat-change",           gl_vi_repeat_change},
  {"find-parenthesis",           gl_find_parenthesis},
  {"read-init-files",            gl_read_init_files},
  {"list-history",               gl_list_history},
  {"user-event1",                gl_user_event1},
  {"user-event2",                gl_user_event2},
  {"user-event3",                gl_user_event3},
  {"user-event4",                gl_user_event4},
};

/*
 * Define the default key-bindings in emacs mode.
 */
static const KtKeyBinding gl_emacs_bindings[] = {
  {"right",        "cursor-right"},
  {"^F",           "cursor-right"},
  {"left",         "cursor-left"},
  {"^B",           "cursor-left"},
  {"M-i",          "insert-mode"},
  {"M-I",          "insert-mode"},
  {"^A",           "beginning-of-line"},
  {"^E",           "end-of-line"},
  {"^U",           "delete-line"},
  {"^K",           "kill-line"},
  {"M-f",          "forward-word"},
  {"M-F",          "forward-word"},
  {"M-b",          "backward-word"},
  {"M-B",          "backward-word"},
  {"^D",           "del-char-or-list-or-eof"},
  {"^H",           "backward-delete-char"},
  {"^?",           "backward-delete-char"},
  {"M-d",          "forward-delete-word"},
  {"M-D",          "forward-delete-word"},
  {"M-^H",         "backward-delete-word"},
  {"M-^?",         "backward-delete-word"},
  {"M-u",          "upcase-word"},
  {"M-U",          "upcase-word"},
  {"M-l",          "downcase-word"},
  {"M-L",          "downcase-word"},
  {"M-c",          "capitalize-word"},
  {"M-C",          "capitalize-word"},
  {"^R",           "redisplay"},
  {"^L",           "clear-screen"},
  {"^T",           "transpose-chars"},
  {"^@",           "set-mark"},
  {"^X^X",         "exchange-point-and-mark"},
  {"^W",           "kill-region"},
  {"M-w",          "copy-region-as-kill"},
  {"M-W",          "copy-region-as-kill"},
  {"^Y",           "yank"},
  {"^P",           "up-history"},
  {"up",           "up-history"},
  {"^N",           "down-history"},
  {"down",         "down-history"},
  {"M-p",          "history-search-backward"},
  {"M-P",          "history-search-backward"},
  {"M-n",          "history-search-forward"},
  {"M-N",          "history-search-forward"},
  {"\t",           "complete-word"},
  {"^X*",          "expand-filename"},
  {"^X^F",         "read-from-file"},
  {"^X^R",         "read-init-files"},
  {"^Xg",          "list-glob"},
  {"^XG",          "list-glob"},
  {"^Xh",          "list-history"},
  {"^XH",          "list-history"},
  {"M-<",          "beginning-of-history"},
  {"M->",          "end-of-history"},
  {"M-0",          "digit-argument"},
  {"M-1",          "digit-argument"},
  {"M-2",          "digit-argument"},
  {"M-3",          "digit-argument"},
  {"M-4",          "digit-argument"},
  {"M-5",          "digit-argument"},
  {"M-6",          "digit-argument"},
  {"M-7",          "digit-argument"},
  {"M-8",          "digit-argument"},
  {"M-9",          "digit-argument"},
  {"\r",           "newline"},
  {"\n",           "newline"},
  {"M-o",          "repeat-history"},
  {"M-C-v",        "vi-mode"},
};

/*
 * Define the default key-bindings in vi mode. Note that in vi-mode
 * meta-key bindings are command-mode bindings. For example M-i first
 * switches to command mode if not already in that mode, then moves
 * the cursor one position right, as in vi.
 */