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- /* readline.c -- a general facility for reading lines of input
- with emacs style editing and completion. */
-
- /* Copyright 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library, a library for
- reading lines of text with interactive input and history editing.
-
- The GNU Readline Library is free software; you can redistribute it
- and/or modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation; either version 1, or
- (at your option) any later version.
-
- The GNU Readline Library 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 General Public License for more details.
-
- The GNU General Public License is often shipped with GNU software, and
- is generally kept in a file called COPYING or LICENSE. If you do not
- have a copy of the license, write to the Free Software Foundation,
- 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "sysdep.h"
- #include <stdio.h>
- #include <fcntl.h>
- #ifndef NO_SYS_FILE
- #include <sys/file.h>
- #endif
- #include <signal.h>
-
- /* This is needed to include support for TIOCGWINSZ and window resizing. */
- #if defined (OSF1) || defined (BSD386) || defined (_386BSD) || defined (AIX)
- # include <sys/ioctl.h>
- #endif /* OSF1 */
-
- #if defined (HAVE_UNISTD_H)
- # include <unistd.h>
- #endif
-
- #include <errno.h>
- /* Not all systems declare ERRNO in errno.h... and some systems #define it! */
- #if !defined (errno)
- extern int errno;
- #endif /* !errno */
-
- extern char * getenv ();
-
- #include <setjmp.h>
- #include <sys/stat.h>
-
- /* System-specific feature definitions and include files. */
- #include "rldefs.h"
-
- /* Some standard library routines. */
- #include "readline.h"
- #include "history.h"
-
- /* NOTE: Functions and variables prefixed with `_rl_' are
- pseudo-global: they are global so they can be shared
- between files in the readline library, but are not intended
- to be visible to readline callers. */
-
- /* Functions imported from other files in the library. */
- extern char *tgetstr ();
- extern void rl_prep_terminal (), rl_deprep_terminal ();
- extern void rl_vi_set_last ();
- extern Function *rl_function_of_keyseq ();
- extern char *tilde_expand ();
-
- /* External redisplay functions and variables from display.c */
- extern void rl_redisplay ();
- extern void _rl_move_vert ();
-
- extern void _rl_erase_at_end_of_line ();
- extern void _rl_move_cursor_relative ();
-
- extern int _rl_vis_botlin;
- extern int _rl_last_c_pos;
- extern int rl_display_fixed;
-
- /* Variables imported from complete.c. */
- extern char *rl_completer_word_break_characters;
- extern char *rl_basic_word_break_characters;
- extern Function *rl_symbolic_link_hook;
- extern int rl_completion_query_items;
- extern int rl_complete_with_tilde_expansion;
-
- /* Forward declarations used in this file. */
- void rl_dispatch ();
- void free_history_entry ();
- int _rl_output_character_function ();
-
- #if !defined (MINIMAL)
- void _rl_set_screen_size ();
- #endif /* !MINIMAL */
-
- void free_undo_list (), rl_add_undo ();
-
- #if !defined (MINIMAL)
- static void readline_default_bindings ();
- #endif /* !MINIMAL */
-
- #if defined (__GO32__)
- # include <sys/pc.h>
- # undef HANDLE_SIGNALS
- #endif /* __GO32__ */
-
- #if defined (STATIC_MALLOC)
- static char *xmalloc (), *xrealloc ();
- #else
- extern char *xmalloc (), *xrealloc ();
- #endif /* STATIC_MALLOC */
-
-
- /* **************************************************************** */
- /* */
- /* Line editing input utility */
- /* */
- /* **************************************************************** */
-
- static char *LibraryVersion = "2.0 (Cygnus)";
-
- /* A pointer to the keymap that is currently in use.
- By default, it is the standard emacs keymap. */
- Keymap _rl_keymap = emacs_standard_keymap;
-
- /* The current style of editing. */
- int rl_editing_mode = emacs_mode;
-
- /* Non-zero if the previous command was a kill command. */
- static int last_command_was_kill = 0;
-
- /* The current value of the numeric argument specified by the user. */
- int rl_numeric_arg = 1;
-
- /* Non-zero if an argument was typed. */
- int rl_explicit_arg = 0;
-
- /* Temporary value used while generating the argument. */
- int rl_arg_sign = 1;
-
- /* Non-zero means we have been called at least once before. */
- static int rl_initialized = 0;
-
- /* If non-zero, this program is running in an EMACS buffer. */
- static char *running_in_emacs = (char *)NULL;
-
- /* The current offset in the current input line. */
- int rl_point;
-
- /* Mark in the current input line. */
- int rl_mark;
-
- /* Length of the current input line. */
- int rl_end;
-
- /* Make this non-zero to return the current input_line. */
- int rl_done;
-
- /* The last function executed by readline. */
- Function *rl_last_func = (Function *)NULL;
-
- /* Top level environment for readline_internal (). */
- static jmp_buf readline_top_level;
-
- /* The streams we interact with. */
- static FILE *in_stream, *out_stream;
-
- /* The names of the streams that we do input and output to. */
- FILE *rl_instream = (FILE *)NULL;
- FILE *rl_outstream = (FILE *)NULL;
-
- /* Non-zero means echo characters as they are read. */
- int readline_echoing_p = 1;
-
- /* Current prompt. */
- char *rl_prompt;
-
- /* The number of characters read in order to type this complete command. */
- int rl_key_sequence_length = 0;
-
- /* If non-zero, then this is the address of a function to call just
- before readline_internal () prints the first prompt. */
- Function *rl_startup_hook = (Function *)NULL;
-
- /* What we use internally. You should always refer to RL_LINE_BUFFER. */
- static char *the_line;
-
- /* The character that can generate an EOF. Really read from
- the terminal driver... just defaulted here. */
- int _rl_eof_char = CTRL ('D');
-
- /* Non-zero makes this the next keystroke to read. */
- int rl_pending_input = 0;
-
- /* Pointer to a useful terminal name. */
- char *rl_terminal_name = (char *)NULL;
-
- /* Non-zero means to always use horizontal scrolling in line display. */
- int _rl_horizontal_scroll_mode = 0;
-
- /* Non-zero means to display an asterisk at the starts of history lines
- which have been modified. */
- int _rl_mark_modified_lines = 0;
-
- /* Non-zero means to use a visible bell if one is available rather than
- simply ringing the terminal bell. */
- int _rl_prefer_visible_bell = 0;
-
- /* Line buffer and maintenence. */
- char *rl_line_buffer = (char *)NULL;
- int rl_line_buffer_len = 0;
- #define DEFAULT_BUFFER_SIZE 256
-
-
- /* **************************************************************** */
- /* */
- /* `Forward' declarations */
- /* */
- /* **************************************************************** */
-
- /* Non-zero means do not parse any lines other than comments and
- parser directives. */
- unsigned char _rl_parsing_conditionalized_out = 0;
-
- /* Non-zero means to save keys that we dispatch on in a kbd macro. */
- static int defining_kbd_macro = 0;
-
- /* Non-zero means to convert characters with the meta bit set to
- escape-prefixed characters so we can indirect through
- emacs_meta_keymap or vi_escape_keymap. */
- int _rl_convert_meta_chars_to_ascii = 1;
-
- /* Non-zero tells rl_delete_text and rl_insert_text to not add to
- the undo list. */
- static int doing_an_undo = 0;
-
- /* **************************************************************** */
- /* */
- /* Top Level Functions */
- /* */
- /* **************************************************************** */
-
- /* Non-zero means treat 0200 bit in terminal input as Meta bit. */
- int _rl_meta_flag = 0; /* Forward declaration */
-
- /* Read a line of input. Prompt with PROMPT. A NULL PROMPT means
- none. A return value of NULL means that EOF was encountered. */
- char *
- readline (prompt)
- char *prompt;
- {
- char *readline_internal ();
- char *value;
-
- rl_prompt = prompt;
-
- /* If we are at EOF return a NULL string. */
- if (rl_pending_input == EOF)
- {
- rl_pending_input = 0;
- return ((char *)NULL);
- }
-
- rl_initialize ();
- rl_prep_terminal (_rl_meta_flag);
-
- #if defined (HANDLE_SIGNALS)
- rl_set_signals ();
- #endif
-
- value = readline_internal ();
- rl_deprep_terminal ();
-
- #if defined (HANDLE_SIGNALS)
- rl_clear_signals ();
- #endif
-
- return (value);
- }
-
- /* Read a line of input from the global rl_instream, doing output on
- the global rl_outstream.
- If rl_prompt is non-null, then that is our prompt. */
- char *
- readline_internal ()
- {
- int lastc, c, eof_found;
-
- in_stream = rl_instream;
- out_stream = rl_outstream;
-
- lastc = -1;
- eof_found = 0;
-
- if (rl_startup_hook)
- (*rl_startup_hook) ();
-
- if (!readline_echoing_p)
- {
- if (rl_prompt)
- {
- fprintf (out_stream, "%s", rl_prompt);
- fflush (out_stream);
- }
- }
- else
- {
- rl_on_new_line ();
- rl_redisplay ();
- #if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- rl_vi_insertion_mode ();
- #endif /* VI_MODE */
- }
-
- while (!rl_done)
- {
- int lk = last_command_was_kill;
- int code;
-
- code = setjmp (readline_top_level);
-
- if (code)
- rl_redisplay ();
-
- if (!rl_pending_input)
- {
- /* Then initialize the argument and number of keys read. */
- rl_init_argument ();
- rl_key_sequence_length = 0;
- }
-
- c = rl_read_key ();
-
- /* EOF typed to a non-blank line is a <NL>. */
- if (c == EOF && rl_end)
- c = NEWLINE;
-
- /* The character _rl_eof_char typed to blank line, and not as the
- previous character is interpreted as EOF. */
- if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end)
- {
- eof_found = 1;
- break;
- }
-
- lastc = c;
- rl_dispatch (c, _rl_keymap);
-
- /* If there was no change in last_command_was_kill, then no kill
- has taken place. Note that if input is pending we are reading
- a prefix command, so nothing has changed yet. */
- if (!rl_pending_input)
- {
- if (lk == last_command_was_kill)
- last_command_was_kill = 0;
- }
-
- #if defined (VI_MODE)
- /* In vi mode, when you exit insert mode, the cursor moves back
- over the previous character. We explicitly check for that here. */
- if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap)
- rl_vi_check ();
- #endif /* VI_MODE */
-
- if (!rl_done)
- rl_redisplay ();
- }
-
- /* Restore the original of this history line, iff the line that we
- are editing was originally in the history, AND the line has changed. */
- {
- HIST_ENTRY *entry = current_history ();
-
- if (entry && rl_undo_list)
- {
- char *temp = savestring (the_line);
- rl_revert_line ();
- entry = replace_history_entry (where_history (), the_line,
- (HIST_ENTRY *)NULL);
- free_history_entry (entry);
-
- strcpy (the_line, temp);
- free (temp);
- }
- }
-
- /* At any rate, it is highly likely that this line has an undo list. Get
- rid of it now. */
- if (rl_undo_list)
- free_undo_list ();
-
- if (eof_found)
- return (char *)NULL;
- else
- return (savestring (the_line));
- }
-
- /* **************************************************************** */
- /* */
- /* Character Input Buffering */
- /* */
- /* **************************************************************** */
-
- static int pop_index = 0, push_index = 0, ibuffer_len = 511;
- static unsigned char ibuffer[512];
-
- /* Non-null means it is a pointer to a function to run while waiting for
- character input. */
- Function *rl_event_hook = (Function *)NULL;
-
- #define any_typein (push_index != pop_index)
-
- /* Add KEY to the buffer of characters to be read. */
- rl_stuff_char (key)
- int key;
- {
- if (key == EOF)
- {
- key = NEWLINE;
- rl_pending_input = EOF;
- }
- ibuffer[push_index++] = key;
- if (push_index >= ibuffer_len)
- push_index = 0;
- }
-
- /* Return the amount of space available in the
- buffer for stuffing characters. */
- int
- ibuffer_space ()
- {
- if (pop_index > push_index)
- return (pop_index - push_index);
- else
- return (ibuffer_len - (push_index - pop_index));
- }
-
- /* Get a key from the buffer of characters to be read.
- Return the key in KEY.
- Result is KEY if there was a key, or 0 if there wasn't. */
- int
- rl_get_char (key)
- int *key;
- {
- if (push_index == pop_index)
- return (0);
-
- *key = ibuffer[pop_index++];
-
- if (pop_index >= ibuffer_len)
- pop_index = 0;
-
- return (1);
- }
-
- /* Stuff KEY into the *front* of the input buffer.
- Returns non-zero if successful, zero if there is
- no space left in the buffer. */
- int
- rl_unget_char (key)
- int key;
- {
- if (ibuffer_space ())
- {
- pop_index--;
- if (pop_index < 0)
- pop_index = ibuffer_len - 1;
- ibuffer[pop_index] = key;
- return (1);
- }
- return (0);
- }
-
- /* If a character is available to be read, then read it
- and stuff it into IBUFFER. Otherwise, just return. */
- void
- rl_gather_tyi ()
- {
- #if defined (MINIMAL)
- char input;
-
- if (isatty (0))
- {
- int i = rl_getc ();
-
- if (i != EOF)
- rl_stuff_char (i);
- }
- else if (kbhit () && ibuffer_space ())
- rl_stuff_char (getkey () & 0x7f);
- #else /* !MINIMAL */
-
- int tty = fileno (in_stream);
- register int tem, result = -1;
- int chars_avail;
- char input;
-
- #if defined (FIONREAD)
- result = ioctl (tty, FIONREAD, &chars_avail);
- #endif
-
- #if defined (O_NDELAY)
- if (result == -1)
- {
- int flags;
-
- flags = fcntl (tty, F_GETFL, 0);
-
- fcntl (tty, F_SETFL, (flags | O_NDELAY));
- chars_avail = read (tty, &input, 1);
-
- fcntl (tty, F_SETFL, flags);
- if (chars_avail == -1 && errno == EAGAIN)
- return;
- }
- #endif /* O_NDELAY */
-
- /* If there's nothing available, don't waste time trying to read
- something. */
- if (chars_avail == 0)
- return;
-
- tem = ibuffer_space ();
-
- if (chars_avail > tem)
- chars_avail = tem;
-
- /* One cannot read all of the available input. I can only read a single
- character at a time, or else programs which require input can be
- thwarted. If the buffer is larger than one character, I lose.
- Damn! */
- if (tem < ibuffer_len)
- chars_avail = 0;
-
- if (result != -1)
- {
- while (chars_avail--)
- rl_stuff_char (rl_getc (in_stream));
- }
- else
- {
- if (chars_avail)
- rl_stuff_char (input);
- }
- #endif /* !MINIMAL */
- }
-
- static int next_macro_key ();
- /* Read a key, including pending input. */
- int
- rl_read_key ()
- {
- int c;
-
- rl_key_sequence_length++;
-
- if (rl_pending_input)
- {
- c = rl_pending_input;
- rl_pending_input = 0;
- }
- else
- {
- /* If input is coming from a macro, then use that. */
- if (c = next_macro_key ())
- return (c);
-
- /* If the user has an event function, then call it periodically. */
- if (rl_event_hook)
- {
- while (rl_event_hook && !rl_get_char (&c))
- {
- (*rl_event_hook) ();
- rl_gather_tyi ();
- }
- }
- else
- {
- if (!rl_get_char (&c))
- c = rl_getc (in_stream);
- }
- }
-
- return (c);
- }
-
- /* Found later in this file. */
- static void add_macro_char (), with_macro_input ();
-
- /* Do the command associated with KEY in MAP.
- If the associated command is really a keymap, then read
- another key, and dispatch into that map. */
- void
- rl_dispatch (key, map)
- register int key;
- Keymap map;
- {
- #if defined (VI_MODE)
- extern int _rl_vi_last_command, _rl_vi_last_repeat, _rl_vi_last_arg_sign;
- #endif
-
- if (defining_kbd_macro)
- add_macro_char (key);
-
- if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii)
- {
- if (map[ESC].type == ISKMAP)
- {
- #if defined (CRAY)
- map = (Keymap)((int)map[ESC].function);
- #else
- map = (Keymap)map[ESC].function;
- #endif
- key = UNMETA (key);
- rl_key_sequence_length += 2;
- rl_dispatch (key, map);
- }
- else
- ding ();
- return;
- }
-
- switch (map[key].type)
- {
- case ISFUNC:
- {
- Function *func = map[key].function;
-
- if (func != (Function *)NULL)
- {
- /* Special case rl_do_lowercase_version (). */
- if (func == rl_do_lowercase_version)
- {
- rl_dispatch (to_lower (key), map);
- return;
- }
-
- (*map[key].function)(rl_numeric_arg * rl_arg_sign, key);
-
- /* If we have input pending, then the last command was a prefix
- command. Don't change the state of rl_last_func. Otherwise,
- remember the last command executed in this variable. */
- if (!rl_pending_input)
- rl_last_func = map[key].function;
- }
- else
- {
- rl_abort ();
- return;
- }
- }
- break;
-
- case ISKMAP:
- if (map[key].function != (Function *)NULL)
- {
- int newkey;
-
- rl_key_sequence_length++;
- newkey = rl_read_key ();
- #if defined (CRAY)
- /* If you cast map[key].function to type (Keymap) on a Cray,
- the compiler takes the value of may[key].function and
- divides it by 4 to convert between pointer types (pointers
- to functions and pointers to structs are different sizes).
- This is not what is wanted. */
- rl_dispatch (newkey, (Keymap)((int)map[key].function));
- #else
- rl_dispatch (newkey, (Keymap)map[key].function);
- #endif /* !CRAY */
- }
- else
- {
- rl_abort ();
- return;
- }
- break;
-
- case ISMACR:
- if (map[key].function != (Function *)NULL)
- {
- char *macro;
-
- macro = savestring ((char *)map[key].function);
- with_macro_input (macro);
- return;
- }
- break;
- }
- #if defined (VI_MODE)
- if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap &&
- rl_vi_textmod_command (key))
- {
- _rl_vi_last_command = key;
- _rl_vi_last_repeat = rl_numeric_arg;
- _rl_vi_last_arg_sign = rl_arg_sign;
- }
- #endif
- }
-
-
- /* **************************************************************** */
- /* */
- /* Hacking Keyboard Macros */
- /* */
- /* **************************************************************** */
-
- /* The currently executing macro string. If this is non-zero,
- then it is a malloc ()'ed string where input is coming from. */
- static char *executing_macro = (char *)NULL;
-
- /* The offset in the above string to the next character to be read. */
- static int executing_macro_index = 0;
-
- /* The current macro string being built. Characters get stuffed
- in here by add_macro_char (). */
- static char *current_macro = (char *)NULL;
-
- /* The size of the buffer allocated to current_macro. */
- static int current_macro_size = 0;
-
- /* The index at which characters are being added to current_macro. */
- static int current_macro_index = 0;
-
- /* A structure used to save nested macro strings.
- It is a linked list of string/index for each saved macro. */
- struct saved_macro {
- struct saved_macro *next;
- char *string;
- int index;
- };
-
- /* The list of saved macros. */
- struct saved_macro *macro_list = (struct saved_macro *)NULL;
-
- /* Forward declarations of static functions. Thank you C. */
- static void push_executing_macro (), pop_executing_macro ();
-
- /* This one has to be declared earlier in the file. */
- /* static void add_macro_char (); */
-
- /* Set up to read subsequent input from STRING.
- STRING is free ()'ed when we are done with it. */
- static void
- with_macro_input (string)
- char *string;
- {
- push_executing_macro ();
- executing_macro = string;
- executing_macro_index = 0;
- }
-
- /* Return the next character available from a macro, or 0 if
- there are no macro characters. */
- static int
- next_macro_key ()
- {
- if (!executing_macro)
- return (0);
-
- if (!executing_macro[executing_macro_index])
- {
- pop_executing_macro ();
- return (next_macro_key ());
- }
-
- return (executing_macro[executing_macro_index++]);
- }
-
- /* Save the currently executing macro on a stack of saved macros. */
- static void
- push_executing_macro ()
- {
- struct saved_macro *saver;
-
- saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro));
- saver->next = macro_list;
- saver->index = executing_macro_index;
- saver->string = executing_macro;
-
- macro_list = saver;
- }
-
- /* Discard the current macro, replacing it with the one
- on the top of the stack of saved macros. */
- static void
- pop_executing_macro ()
- {
- if (executing_macro)
- free (executing_macro);
-
- executing_macro = (char *)NULL;
- executing_macro_index = 0;
-
- if (macro_list)
- {
- struct saved_macro *disposer = macro_list;
- executing_macro = macro_list->string;
- executing_macro_index = macro_list->index;
- macro_list = macro_list->next;
- free (disposer);
- }
- }
-
- /* Add a character to the macro being built. */
- static void
- add_macro_char (c)
- int c;
- {
- if (current_macro_index + 1 >= current_macro_size)
- {
- if (!current_macro)
- current_macro = (char *)xmalloc (current_macro_size = 25);
- else
- current_macro =
- (char *)xrealloc (current_macro, current_macro_size += 25);
- }
-
- current_macro[current_macro_index++] = c;
- current_macro[current_macro_index] = '\0';
- }
-
- /* Begin defining a keyboard macro.
- Keystrokes are recorded as they are executed.
- End the definition with rl_end_kbd_macro ().
- If a numeric argument was explicitly typed, then append this
- definition to the end of the existing macro, and start by
- re-executing the existing macro. */
- rl_start_kbd_macro (ignore1, ignore2)
- int ignore1, ignore2;
- {
- if (defining_kbd_macro)
- rl_abort ();
-
- if (rl_explicit_arg)
- {
- if (current_macro)
- with_macro_input (savestring (current_macro));
- }
- else
- current_macro_index = 0;
-
- defining_kbd_macro = 1;
- }
-
- /* Stop defining a keyboard macro.
- A numeric argument says to execute the macro right now,
- that many times, counting the definition as the first time. */
- rl_end_kbd_macro (count, ignore)
- int count, ignore;
- {
- if (!defining_kbd_macro)
- rl_abort ();
-
- current_macro_index -= (rl_key_sequence_length - 1);
- current_macro[current_macro_index] = '\0';
-
- defining_kbd_macro = 0;
-
- rl_call_last_kbd_macro (--count, 0);
- }
-
- /* Execute the most recently defined keyboard macro.
- COUNT says how many times to execute it. */
- rl_call_last_kbd_macro (count, ignore)
- int count, ignore;
- {
- if (!current_macro)
- rl_abort ();
-
- if (defining_kbd_macro)
- {
- ding (); /* no recursive macros */
- current_macro[--current_macro_index] = '\0'; /* erase this char */
- return 0;
- }
-
- while (count--)
- with_macro_input (savestring (current_macro));
- }
-
- void
- _rl_kill_kbd_macro ()
- {
- if (current_macro)
- {
- free (current_macro);
- current_macro = (char *) NULL;
- }
- current_macro_size = current_macro_index = 0;
-
- if (executing_macro)
- {
- free (executing_macro);
- executing_macro = (char *) NULL;
- }
- executing_macro_index = 0;
-
- defining_kbd_macro = 0;
- }
-
-
- /* **************************************************************** */
- /* */
- /* Initializations */
- /* */
- /* **************************************************************** */
-
- /* Initliaze readline (and terminal if not already). */
- rl_initialize ()
- {
- /* If we have never been called before, initialize the
- terminal and data structures. */
- if (!rl_initialized)
- {
- readline_initialize_everything ();
- rl_initialized++;
- }
-
- /* Initalize the current line information. */
- rl_point = rl_end = 0;
- the_line = rl_line_buffer;
- the_line[0] = 0;
-
- /* We aren't done yet. We haven't even gotten started yet! */
- rl_done = 0;
-
- /* Tell the history routines what is going on. */
- start_using_history ();
-
- /* Make the display buffer match the state of the line. */
- rl_reset_line_state ();
-
- /* No such function typed yet. */
- rl_last_func = (Function *)NULL;
-
- /* Parsing of key-bindings begins in an enabled state. */
- _rl_parsing_conditionalized_out = 0;
- }
-
- /* Initialize the entire state of the world. */
- readline_initialize_everything ()
- {
- /* Find out if we are running in Emacs. */
- running_in_emacs = getenv ("EMACS");
-
- /* Set up input and output if they are not already set up. */
- if (!rl_instream)
- rl_instream = stdin;
-
- if (!rl_outstream)
- rl_outstream = stdout;
-
- /* Bind in_stream and out_stream immediately. These values may change,
- but they may also be used before readline_internal () is called. */
- in_stream = rl_instream;
- out_stream = rl_outstream;
-
- /* Allocate data structures. */
- if (!rl_line_buffer)
- rl_line_buffer =
- (char *)xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE);
-
- /* Initialize the terminal interface. */
- init_terminal_io ((char *)NULL);
-
- #if !defined (MINIMAL)
- /* Bind tty characters to readline functions. */
- readline_default_bindings ();
- #endif /* !MINIMAL */
-
- /* Initialize the function names. */
- rl_initialize_funmap ();
-
- /* Read in the init file. */
- rl_read_init_file ((char *)NULL);
-
- /* If the completion parser's default word break characters haven't
- been set yet, then do so now. */
- {
- if (rl_completer_word_break_characters == (char *)NULL)
- rl_completer_word_break_characters = rl_basic_word_break_characters;
- }
- }
-
- /* If this system allows us to look at the values of the regular
- input editing characters, then bind them to their readline
- equivalents, iff the characters are not bound to keymaps. */
- #if !defined (MINIMAL)
- static void
- readline_default_bindings ()
- {
- rltty_set_default_bindings (_rl_keymap);
- }
- #endif /* !MINIMAL */
-
-
- /* **************************************************************** */
- /* */
- /* Numeric Arguments */
- /* */
- /* **************************************************************** */
-
- /* Handle C-u style numeric args, as well as M--, and M-digits. */
-
- /* Add the current digit to the argument in progress. */
- rl_digit_argument (ignore, key)
- int ignore, key;
- {
- rl_pending_input = key;
- rl_digit_loop ();
- }
-
- /* What to do when you abort reading an argument. */
- rl_discard_argument ()
- {
- ding ();
- rl_clear_message ();
- rl_init_argument ();
- }
-
- /* Create a default argument. */
- rl_init_argument ()
- {
- rl_numeric_arg = rl_arg_sign = 1;
- rl_explicit_arg = 0;
- }
-
- /* C-u, universal argument. Multiply the current argument by 4.
- Read a key. If the key has nothing to do with arguments, then
- dispatch on it. If the key is the abort character then abort. */
- rl_universal_argument ()
- {
- rl_numeric_arg *= 4;
- rl_digit_loop ();
- }
-
- rl_digit_loop ()
- {
- int key, c;
- while (1)
- {
- rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg);
- key = c = rl_read_key ();
-
- if (_rl_keymap[c].type == ISFUNC &&
- _rl_keymap[c].function == rl_universal_argument)
- {
- rl_numeric_arg *= 4;
- continue;
- }
- c = UNMETA (c);
- if (numeric (c))
- {
- if (rl_explicit_arg)
- rl_numeric_arg = (rl_numeric_arg * 10) + (c - '0');
- else
- rl_numeric_arg = (c - '0');
- rl_explicit_arg = 1;
- }
- else
- {
- if (c == '-' && !rl_explicit_arg)
- {
- rl_numeric_arg = 1;
- rl_arg_sign = -1;
- }
- else
- {
- rl_clear_message ();
- rl_dispatch (key, _rl_keymap);
- return;
- }
- }
- }
- }
-
- /* **************************************************************** */
- /* */
- /* Terminal and Termcap */
- /* */
- /* **************************************************************** */
-
- static char *term_buffer = (char *)NULL;
- static char *term_string_buffer = (char *)NULL;
-
- /* Non-zero means this terminal can't really do anything. */
- int dumb_term = 0;
- /* On Solaris2, sys/types.h #includes sys/reg.h, which #defines PC.
- Unfortunately, PC is a global variable used by the termcap library. */
- #undef PC
-
- #if !defined (__linux__)
- char PC;
- char *BC, *UP;
- #endif /* __linux__ */
-
- /* Some strings to control terminal actions. These are output by tputs (). */
- char *term_goto, *term_clreol, *term_cr, *term_clrpag, *term_backspace;
-
- int screenwidth, screenheight;
-
- /* Non-zero if we determine that the terminal can do character insertion. */
- int terminal_can_insert = 0;
-
- /* How to insert characters. */
- char *term_im, *term_ei, *term_ic, *term_ip, *term_IC;
-
- /* How to delete characters. */
- char *term_dc, *term_DC;
-
- #if defined (HACK_TERMCAP_MOTION)
- char *term_forward_char;
- #endif /* HACK_TERMCAP_MOTION */
-
- /* How to go up a line. */
- char *term_up;
-
- /* True if we have funny auto-line-wrap ("am" and "xn"). */
- int term_xn;
-
- /* A visible bell, if the terminal can be made to flash the screen. */
- char *visible_bell;
-
- /* Non-zero means that this terminal has a meta key. */
- int term_has_meta;
-
- /* The string to write to turn on the meta key, if this term has one. */
- char *term_mm;
-
- /* The string to write to turn off the meta key, if this term has one. */
- char *term_mo;
-
- /* The key sequences output by the arrow keys, if this terminal has any. */
- char *term_ku, *term_kd, *term_kr, *term_kl;
-
- /* Re-initialize the terminal considering that the TERM/TERMCAP variable
- has changed. */
- rl_reset_terminal (terminal_name)
- char *terminal_name;
- {
- init_terminal_io (terminal_name);
- }
-
- /* Set readline's idea of the screen size. TTY is a file descriptor open
- to the terminal. If IGNORE_ENV is true, we do not pay attention to the
- values of $LINES and $COLUMNS. The tests for TERM_STRING_BUFFER being
- non-null serve to check whether or not we have initialized termcap. */
- #if !defined (MINIMAL)
- void
- _rl_set_screen_size (tty, ignore_env)
- int tty, ignore_env;
- {
- #ifndef MINIMAL
- #if defined (TIOCGWINSZ) && !defined (TIOCGWINSZ_BROKEN)
- struct winsize window_size;
- #endif /* TIOCGWINSZ */
-
- #if defined (TIOCGWINSZ) && !defined (TIOCGWINSZ_BROKEN)
- if (ioctl (tty, TIOCGWINSZ, &window_size) == 0)
- {
- screenwidth = (int) window_size.ws_col;
- screenheight = (int) window_size.ws_row;
- }
- #endif /* TIOCGWINSZ */
-
- /* Environment variable COLUMNS overrides setting of "co" if IGNORE_ENV
- is unset. */
- if (screenwidth <= 0)
- {
- char *sw;
-
- if (!ignore_env && (sw = getenv ("COLUMNS")))
- screenwidth = atoi (sw);
-
- if (screenwidth <= 0 && term_string_buffer)
- screenwidth = tgetnum ("co");
- }
-
- /* Environment variable LINES overrides setting of "li" if IGNORE_ENV
- is unset. */
- if (screenheight <= 0)
- {
- char *sh;
-
- if (!ignore_env && (sh = getenv ("LINES")))
- screenheight = atoi (sh);
-
- if (screenheight <= 0 && term_string_buffer)
- screenheight = tgetnum ("li");
- }
-
- /* If all else fails, default to 80x24 terminal. */
- if (screenwidth <= 0)
- screenwidth = 80;
-
- if (screenheight <= 0)
- screenheight = 24;
-
- #if defined (SHELL)
- /* If we're being compiled as part of bash, set the environment
- variables $LINES and $COLUMNS to new values. */
- set_lines_and_columns (screenheight, screenwidth);
- #endif
-
- /* If we don't have xn (most modern terminals do),
- don't use the last column. */
- if (!term_xn)
- screenwidth--;
- #endif
- }
- #endif /* !MINIMAL */
-
- init_terminal_io (terminal_name)
- char *terminal_name;
- {
- #if defined (MINIMAL)
- screenwidth = ScreenCols ();
- screenheight = ScreenRows ();
- term_cr = "\r";
- term_im = term_ei = term_ic = term_IC = (char *)NULL;
- term_up = term_dc = term_DC = visible_bell = (char *)NULL;
-
- /* Does the MINIMAL have a meta key? I don't know. */
- term_has_meta = 0;
- term_mm = term_mo = (char *)NULL;
-
- /* It probably has arrow keys, but I don't know what they are. */
- term_ku = term_kd = term_kr = term_kl = (char *)NULL;
-
- #if defined (HACK_TERMCAP_MOTION)
- term_forward_char = (char *)NULL;
- #endif /* HACK_TERMCAP_MOTION */
- terminal_can_insert = term_xn = 0;
- return;
- #else /* !MINIMAL */
-
- char *term, *buffer;
- int tty;
-
- term = terminal_name ? terminal_name : getenv ("TERM");
-
- if (!term_string_buffer)
- term_string_buffer = (char *)xmalloc (2048);
-
- if (!term_buffer)
- term_buffer = (char *)xmalloc (2048);
-
- buffer = term_string_buffer;
-
- term_clrpag = term_cr = term_clreol = (char *)NULL;
-
- if (!term)
- term = "dumb";
-
- if (tgetent (term_buffer, term) <= 0)
- {
- dumb_term = 1;
- screenwidth = 79;
- screenheight = 24;
- term_cr = "\r";
- term_im = term_ei = term_ic = term_IC = (char *)NULL;
- term_up = term_dc = term_DC = visible_bell = (char *)NULL;
- term_ku = term_kd = term_kl = term_kr = (char *)NULL;
- #if defined (HACK_TERMCAP_MOTION)
- term_forward_char = (char *)NULL;
- #endif
- terminal_can_insert = term_xn = 0;
- return;
- }
-
- BC = tgetstr ("pc", &buffer);
- PC = buffer ? *buffer : 0;
-
- term_backspace = tgetstr ("le", &buffer);
-
- term_cr = tgetstr ("cr", &buffer);
- term_clreol = tgetstr ("ce", &buffer);
- term_clrpag = tgetstr ("cl", &buffer);
-
- if (!term_cr)
- term_cr = "\r";
-
- #if defined (HACK_TERMCAP_MOTION)
- term_forward_char = tgetstr ("nd", &buffer);
- #endif /* HACK_TERMCAP_MOTION */
-
- if (rl_instream)
- tty = fileno (rl_instream);
- else
- tty = 0;
-
- screenwidth = screenheight = 0;
-
- term_xn = tgetflag ("am") && tgetflag ("xn");
-
- _rl_set_screen_size (tty, 0);
-
- term_im = tgetstr ("im", &buffer);
- term_ei = tgetstr ("ei", &buffer);
- term_IC = tgetstr ("IC", &buffer);
- term_ic = tgetstr ("ic", &buffer);
-
- /* "An application program can assume that the terminal can do
- character insertion if *any one of* the capabilities `IC',
- `im', `ic' or `ip' is provided." But we can't do anything if
- only `ip' is provided, so... */
- terminal_can_insert = (term_IC || term_im || term_ic);
-
- term_up = tgetstr ("up", &buffer);
- term_dc = tgetstr ("dc", &buffer);
- term_DC = tgetstr ("DC", &buffer);
-
- visible_bell = tgetstr ("vb", &buffer);
-
- /* Check to see if this terminal has a meta key. */
- term_has_meta = (tgetflag ("km") || tgetflag ("MT"));
- if (term_has_meta)
- {
- term_mm = tgetstr ("mm", &buffer);
- term_mo = tgetstr ("mo", &buffer);
- }
- else
- {
- term_mm = (char *)NULL;
- term_mo = (char *)NULL;
- }
-
- /* Attempt to find and bind the arrow keys. Do not override already
- bound keys in an overzealous attempt, however. */
- term_ku = tgetstr ("ku", &buffer);
- term_kd = tgetstr ("kd", &buffer);
- term_kr = tgetstr ("kr", &buffer);
- term_kl = tgetstr ("kl", &buffer);
-
- if (term_ku)
- {
- Function *func;
-
- func = rl_function_of_keyseq (term_ku, _rl_keymap, (int *)NULL);
-
- if (!func || func == rl_do_lowercase_version)
- rl_set_key (term_ku, rl_get_previous_history, _rl_keymap);
- }
-
- if (term_kd)
- {
- Function *func;
-
- func = rl_function_of_keyseq (term_kd, _rl_keymap, (int *)NULL);
-
- if (!func || func == rl_do_lowercase_version)
- rl_set_key (term_kd, rl_get_next_history, _rl_keymap);
- }
-
- if (term_kr)
- {
- Function *func;
-
- func = rl_function_of_keyseq (term_kr, _rl_keymap, (int *)NULL);
-
- if (!func || func == rl_do_lowercase_version)
- rl_set_key (term_kr, rl_forward, _rl_keymap);
- }
-
- if (term_kl)
- {
- Function *func;
-
- func = rl_function_of_keyseq (term_kl, _rl_keymap, (int *)NULL);
-
- if (!func || func == rl_do_lowercase_version)
- rl_set_key (term_kl, rl_backward, _rl_keymap);
- }
- #endif /* !MINIMAL */
- return 0;
- }
-
- /* A function for the use of tputs () */
- int
- _rl_output_character_function (c)
- int c;
- {
- return putc (c, out_stream);
- }
-
- /* Write COUNT characters from STRING to the output stream. */
- void
- _rl_output_some_chars (string, count)
- char *string;
- int count;
- {
- fwrite (string, 1, count, out_stream);
- }
-
- /* Move the cursor back. */
- backspace (count)
- int count;
- {
- register int i;
-
- #if !defined (MINIMAL)
- if (term_backspace)
- for (i = 0; i < count; i++)
- tputs (term_backspace, 1, _rl_output_character_function);
- else
- #endif /* !MINIMAL */
- for (i = 0; i < count; i++)
- putc ('\b', out_stream);
- }
-
- /* Move to the start of the next line. */
- crlf ()
- {
- #if defined (NEW_TTY_DRIVER)
- tputs (term_cr, 1, _rl_output_character_function);
- #endif /* NEW_TTY_DRIVER */
- putc ('\n', out_stream);
- }
-
-
- /* **************************************************************** */
- /* */
- /* Utility Functions */
- /* */
- /* **************************************************************** */
-
- /* Return 0 if C is not a member of the class of characters that belong
- in words, or 1 if it is. */
-
- int allow_pathname_alphabetic_chars = 0;
- char *pathname_alphabetic_chars = "/-_=~.#$";
-
- int
- alphabetic (c)
- int c;
- {
- if (pure_alphabetic (c) || (numeric (c)))
- return (1);
-
- if (allow_pathname_alphabetic_chars)
- return (strchr (pathname_alphabetic_chars, c) != NULL);
- else
- return (0);
- }
-
- /* Return non-zero if C is a numeric character. */
- int
- numeric (c)
- int c;
- {
- return (c >= '0' && c <= '9');
- }
-
- /* Ring the terminal bell. */
- int
- ding ()
- {
- if (readline_echoing_p)
- {
- #if !defined (MINIMAL)
- if (_rl_prefer_visible_bell && visible_bell)
- tputs (visible_bell, 1, _rl_output_character_function);
- else
- #endif /* !MINIMAL */
- {
- fprintf (stderr, "\007");
- fflush (stderr);
- }
- }
- return (-1);
- }
-
- /* How to abort things. */
- rl_abort ()
- {
- ding ();
- rl_clear_message ();
- rl_init_argument ();
- rl_pending_input = 0;
-
- defining_kbd_macro = 0;
- while (executing_macro)
- pop_executing_macro ();
-
- rl_last_func = (Function *)NULL;
- longjmp (readline_top_level, 1);
- }
-
- /* Return a copy of the string between FROM and TO.
- FROM is inclusive, TO is not. */
- char *
- rl_copy_text (from, to)
- int from, to;
- {
- register int length;
- char *copy;
-
- /* Fix it if the caller is confused. */
- if (from > to)
- {
- int t = from;
- from = to;
- to = t;
- }
-
- length = to - from;
- copy = (char *)xmalloc (1 + length);
- strncpy (copy, the_line + from, length);
- copy[length] = '\0';
- return (copy);
- }
-
- /* Increase the size of RL_LINE_BUFFER until it has enough space to hold
- LEN characters. */
- void
- rl_extend_line_buffer (len)
- int len;
- {
- while (len >= rl_line_buffer_len)
- rl_line_buffer =
- (char *)xrealloc
- (rl_line_buffer, rl_line_buffer_len += DEFAULT_BUFFER_SIZE);
-
- the_line = rl_line_buffer;
- }
-
-
- /* **************************************************************** */
- /* */
- /* Insert and Delete */
- /* */
- /* **************************************************************** */
-
- /* Insert a string of text into the line at point. This is the only
- way that you should do insertion. rl_insert () calls this
- function. */
- rl_insert_text (string)
- char *string;
- {
- register int i, l = strlen (string);
-
- if (rl_end + l >= rl_line_buffer_len)
- rl_extend_line_buffer (rl_end + l);
-
- for (i = rl_end; i >= rl_point; i--)
- the_line[i + l] = the_line[i];
- strncpy (the_line + rl_point, string, l);
-
- /* Remember how to undo this if we aren't undoing something. */
- if (!doing_an_undo)
- {
- /* If possible and desirable, concatenate the undos. */
- if ((strlen (string) == 1) &&
- rl_undo_list &&
- (rl_undo_list->what == UNDO_INSERT) &&
- (rl_undo_list->end == rl_point) &&
- (rl_undo_list->end - rl_undo_list->start < 20))
- rl_undo_list->end++;
- else
- rl_add_undo (UNDO_INSERT, rl_point, rl_point + l, (char *)NULL);
- }
- rl_point += l;
- rl_end += l;
- the_line[rl_end] = '\0';
- }
-
- /* Delete the string between FROM and TO. FROM is
- inclusive, TO is not. */
- rl_delete_text (from, to)
- int from, to;
- {
- register char *text;
-
- /* Fix it if the caller is confused. */
- if (from > to)
- {
- int t = from;
- from = to;
- to = t;
- }
- text = rl_copy_text (from, to);
- strncpy (the_line + from, the_line + to, rl_end - to);
-
- /* Remember how to undo this delete. */
- if (!doing_an_undo)
- rl_add_undo (UNDO_DELETE, from, to, text);
- else
- free (text);
-
- rl_end -= (to - from);
- the_line[rl_end] = '\0';
- }
-
-
- /* **************************************************************** */
- /* */
- /* Readline character functions */
- /* */
- /* **************************************************************** */
-
- /* This is not a gap editor, just a stupid line input routine. No hair
- is involved in writing any of the functions, and none should be. */
-
- /* Note that:
-
- rl_end is the place in the string that we would place '\0';
- i.e., it is always safe to place '\0' there.
-
- rl_point is the place in the string where the cursor is. Sometimes
- this is the same as rl_end.
-
- Any command that is called interactively receives two arguments.
- The first is a count: the numeric arg pased to this command.
- The second is the key which invoked this command.
- */
-
-
- /* **************************************************************** */
- /* */
- /* Movement Commands */
- /* */
- /* **************************************************************** */
-
- /* Note that if you `optimize' the display for these functions, you cannot
- use said functions in other functions which do not do optimizing display.
- I.e., you will have to update the data base for rl_redisplay, and you
- might as well let rl_redisplay do that job. */
-
- /* Move forward COUNT characters. */
- rl_forward (count)
- int count;
- {
- if (count < 0)
- rl_backward (-count);
- else
- while (count)
- {
- #if defined (VI_MODE)
- if (rl_point >= (rl_end - (rl_editing_mode == vi_mode)))
- #else
- if (rl_point == rl_end)
- #endif /* VI_MODE */
- {
- ding ();
- return 0;
- }
- else
- rl_point++;
- --count;
- }
- return 0;
- }
-
- /* Move backward COUNT characters. */
- rl_backward (count)
- int count;
- {
- if (count < 0)
- rl_forward (-count);
- else
- while (count)
- {
- if (!rl_point)
- {
- ding ();
- return 0;
- }
- else
- --rl_point;
- --count;
- }
- return 0;
- }
-
- /* Move to the beginning of the line. */
- rl_beg_of_line ()
- {
- rl_point = 0;
- return 0;
- }
-
- /* Move to the end of the line. */
- rl_end_of_line ()
- {
- rl_point = rl_end;
- return 0;
- }
-
- /* Move forward a word. We do what Emacs does. */
- rl_forward_word (count)
- int count;
- {
- int c;
-
- if (count < 0)
- {
- rl_backward_word (-count);
- return 0;
- }
-
- while (count)
- {
- if (rl_point == rl_end)
- return 0;
-
- /* If we are not in a word, move forward until we are in one.
- Then, move forward until we hit a non-alphabetic character. */
- c = the_line[rl_point];
- if (!alphabetic (c))
- {
- while (++rl_point < rl_end)
- {
- c = the_line[rl_point];
- if (alphabetic (c)) break;
- }
- }
- if (rl_point == rl_end) return;
- while (++rl_point < rl_end)
- {
- c = the_line[rl_point];
- if (!alphabetic (c)) break;
- }
- --count;
- }
- return 0;
- }
-
- /* Move backward a word. We do what Emacs does. */
- rl_backward_word (count)
- int count;
- {
- int c;
-
- if (count < 0)
- {
- rl_forward_word (-count);
- return 0;
- }
-
- while (count)
- {
- if (!rl_point)
- return 0;
-
- /* Like rl_forward_word (), except that we look at the characters
- just before point. */
-
- c = the_line[rl_point - 1];
- if (!alphabetic (c))
- {
- while (--rl_point)
- {
- c = the_line[rl_point - 1];
- if (alphabetic (c)) break;
- }
- }
-
- while (rl_point)
- {
- c = the_line[rl_point - 1];
- if (!alphabetic (c))
- break;
- else --rl_point;
- }
- --count;
- }
- return 0;
- }
-
- /* Clear the current line. Numeric argument to C-l does this. */
- rl_refresh_line ()
- {
- int curr_line = _rl_last_c_pos / screenwidth;
-
- _rl_move_vert (curr_line);
- _rl_move_cursor_relative (0, the_line); /* XXX is this right */
-
- #if defined (WIN32)
- abort();
- #else
- #if defined (__GO32__)
- {
- int row, col, width, row_start;
-
- ScreenGetCursor (&row, &col);
- width = ScreenCols ();
- row_start = ScreenPrimary + (row * width);
- memset (row_start + col, 0, (width - col) * 2);
- }
- #else /* !MINIMAL */
- if (term_clreol)
- tputs (term_clreol, 1, _rl_output_character_function);
- #endif /* !MINIMAL */
- #endif
- rl_forced_update_display ();
- rl_display_fixed = 1;
-
- return 0;
- }
-
- /* C-l typed to a line without quoting clears the screen, and then reprints
- the prompt and the current input line. Given a numeric arg, redraw only
- the current line. */
- rl_clear_screen ()
- {
- if (rl_explicit_arg)
- {
- rl_refresh_line ();
- return 0;
- }
-
- #if !defined (MINIMAL)
- if (term_clrpag)
- tputs (term_clrpag, 1, _rl_output_character_function);
- else
- #endif /* !MINIMAL */
- crlf ();
-
- rl_forced_update_display ();
- rl_display_fixed = 1;
-
- return 0;
- }
-
- rl_arrow_keys (count, c)
- int count, c;
- {
- int ch;
-
- ch = rl_read_key ();
-
- switch (to_upper (ch))
- {
- case 'A':
- rl_get_previous_history (count);
- break;
-
- case 'B':
- rl_get_next_history (count);
- break;
-
- case 'C':
- rl_forward (count);
- break;
-
- case 'D':
- rl_backward (count);
- break;
-
- default:
- ding ();
- }
- return 0;
- }
-
-
- /* **************************************************************** */
- /* */
- /* Text commands */
- /* */
- /* **************************************************************** */
-
- /* Insert the character C at the current location, moving point forward. */
- rl_insert (count, c)
- int count, c;
- {
- register int i;
- char *string;
-
- if (count <= 0)
- return 0;
-
- /* If we can optimize, then do it. But don't let people crash
- readline because of extra large arguments. */
- if (count > 1 && count < 1024)
- {
- string = (char *)alloca (1 + count);
-
- for (i = 0; i < count; i++)
- string[i] = c;
-
- string[i] = '\0';
- rl_insert_text (string);
- return 0;
- }
-
- if (count > 1024)
- {
- int decreaser;
-
- string = (char *)alloca (1024 + 1);
-
- for (i = 0; i < 1024; i++)
- string[i] = c;
-
- while (count)
- {
- decreaser = (count > 1024 ? 1024 : count);
- string[decreaser] = '\0';
- rl_insert_text (string);
- count -= decreaser;
- }
- return 0;
- }
-
- /* We are inserting a single character.
- If there is pending input, then make a string of all of the
- pending characters that are bound to rl_insert, and insert
- them all. */
- if (any_typein)
- {
- int key = 0, t;
-
- i = 0;
- string = (char *)alloca (ibuffer_len + 1);
- string[i++] = c;
-
- while ((t = rl_get_char (&key)) &&
- (_rl_keymap[key].type == ISFUNC &&
- _rl_keymap[key].function == rl_insert))
- string[i++] = key;
-
- if (t)
- rl_unget_char (key);
-
- string[i] = '\0';
- rl_insert_text (string);
- }
- else
- {
- /* Inserting a single character. */
- string = (char *)alloca (2);
-
- string[1] = '\0';
- string[0] = c;
- rl_insert_text (string);
- }
- return 0;
- }
-
- /* Insert the next typed character verbatim. */
- rl_quoted_insert (count)
- int count;
- {
- int c;
-
- c = rl_read_key ();
- return (rl_insert (count, c));
-
- }
-
- /* Insert a tab character. */
- rl_tab_insert (count)
- int count;
- {
- return (rl_insert (count, '\t'));
- }
-
- /* What to do when a NEWLINE is pressed. We accept the whole line.
- KEY is the key that invoked this command. I guess it could have
- meaning in the future. */
- rl_newline (count, key)
- int count, key;
- {
- rl_done = 1;
-
- #if defined (VI_MODE)
- {
- extern int _rl_vi_doing_insert;
- if (_rl_vi_doing_insert)
- {
- rl_end_undo_group ();
- _rl_vi_doing_insert = 0;
- }
- }
- rl_vi_set_last ();
-
- #endif /* VI_MODE */
-
- if (readline_echoing_p)
- {
- _rl_move_vert (_rl_vis_botlin);
- _rl_vis_botlin = 0;
- crlf ();
- fflush (out_stream);
- rl_display_fixed++;
- }
- return 0;
- }
-
- rl_clean_up_for_exit ()
- {
- if (readline_echoing_p)
- {
- _rl_move_vert (_rl_vis_botlin);
- _rl_vis_botlin = 0;
- fflush (out_stream);
- rl_restart_output ();
- }
- return 0;
- }
-
- /* What to do for some uppercase characters, like meta characters,
- and some characters appearing in emacs_ctlx_keymap. This function
- is just a stub, you bind keys to it and the code in rl_dispatch ()
- is special cased. */
- rl_do_lowercase_version (ignore1, ignore2)
- int ignore1, ignore2;
- {
- return 0;
- }
-
- /* Rubout the character behind point. */
- rl_rubout (count)
- int count;
- {
- if (count < 0)
- {
- rl_delete (-count);
- return 0;
- }
-
- if (!rl_point)
- {
- ding ();
- return -1;
- }
-
- if (count > 1 || rl_explicit_arg)
- {
- int orig_point = rl_point;
- rl_backward (count);
- rl_kill_text (orig_point, rl_point);
- }
- else
- {
- int c = the_line[--rl_point];
- rl_delete_text (rl_point, rl_point + 1);
-
- if (rl_point == rl_end && isprint (c) && _rl_last_c_pos)
- {
- int l;
- l = rl_character_len (c, rl_point);
- _rl_erase_at_end_of_line (l);
- }
- }
- return 0;
- }
-
- /* Delete the character under the cursor. Given a numeric argument,
- kill that many characters instead. */
- rl_delete (count, invoking_key)
- int count, invoking_key;
- {
- if (count < 0)
- {
- return (rl_rubout (-count));
- }
-
- if (rl_point == rl_end)
- {
- ding ();
- return -1;
- }
-
- if (count > 1 || rl_explicit_arg)
- {
- int orig_point = rl_point;
- rl_forward (count);
- rl_kill_text (orig_point, rl_point);
- rl_point = orig_point;
- return 0;
- }
- else
- return (rl_delete_text (rl_point, rl_point + 1));
-
- }
-
- /* Delete all spaces and tabs around point. */
- rl_delete_horizontal_space (count, ignore)
- int count, ignore;
- {
- int start = rl_point;
-
- while (rl_point && whitespace (the_line[rl_point - 1]))
- rl_point--;
-
- start = rl_point;
-
- while (rl_point < rl_end && whitespace (the_line[rl_point]))
- rl_point++;
-
- if (start != rl_point)
- {
- rl_delete_text (start, rl_point);
- rl_point = start;
- }
- return 0;
- }
-
-
- /* **************************************************************** */
- /* */
- /* Kill commands */
- /* */
- /* **************************************************************** */
-
- /* The next two functions mimic unix line editing behaviour, except they
- save the deleted text on the kill ring. This is safer than not saving
- it, and since we have a ring, nobody should get screwed. */
-
- /* This does what C-w does in Unix. We can't prevent people from
- using behaviour that they expect. */
- rl_unix_word_rubout ()
- {
- if (!rl_point)
- ding ();
- else
- {
- int orig_point = rl_point;
-
- while (rl_point && whitespace (the_line[rl_point - 1]))
- rl_point--;
-
- while (rl_point && !whitespace (the_line[rl_point - 1]))
- rl_point--;
-
- rl_kill_text (rl_point, orig_point);
- }
- return 0;
- }
-
- /* Here is C-u doing what Unix does. You don't *have* to use these
- key-bindings. We have a choice of killing the entire line, or
- killing from where we are to the start of the line. We choose the
- latter, because if you are a Unix weenie, then you haven't backspaced
- into the line at all, and if you aren't, then you know what you are
- doing. */
- rl_unix_line_discard ()
- {
- if (!rl_point)
- ding ();
- else
- {
- rl_kill_text (rl_point, 0);
- rl_point = 0;
- }
- return 0;
- }
-
-
- /* **************************************************************** */
- /* */
- /* Commands For Typos */
- /* */
- /* **************************************************************** */
-
- /* Random and interesting things in here. */
-
- /* **************************************************************** */
- /* */
- /* Changing Case */
- /* */
- /* **************************************************************** */
-
- /* The three kinds of things that we know how to do. */
- #define UpCase 1
- #define DownCase 2
- #define CapCase 3
-
- static int rl_change_case ();
-
- /* Uppercase the word at point. */
- rl_upcase_word (count)
- int count;
- {
- return (rl_change_case (count, UpCase));
- }
-
- /* Lowercase the word at point. */
- rl_downcase_word (count)
- int count;
- {
- return (rl_change_case (count, DownCase));
- }
-
- /* Upcase the first letter, downcase the rest. */
- rl_capitalize_word (count)
- int count;
- {
- return (rl_change_case (count, CapCase));
- }
-
- /* The meaty function.
- Change the case of COUNT words, performing OP on them.
- OP is one of UpCase, DownCase, or CapCase.
- If a negative argument is given, leave point where it started,
- otherwise, leave it where it moves to. */
- static int
- rl_change_case (count, op)
- int count, op;
- {
- register int start = rl_point, end;
- int state = 0;
-
- rl_forward_word (count);
- end = rl_point;
-
- if (count < 0)
- {
- int temp = start;
- start = end;
- end = temp;
- }
-
- /* We are going to modify some text, so let's prepare to undo it. */
- rl_modifying (start, end);
-
- for (; start < end; start++)
- {
- switch (op)
- {
- case UpCase:
- the_line[start] = to_upper (the_line[start]);
- break;
-
- case DownCase:
- the_line[start] = to_lower (the_line[start]);
- break;
-
- case CapCase:
- if (state == 0)
- {
- the_line[start] = to_upper (the_line[start]);
- state = 1;
- }
- else
- {
- the_line[start] = to_lower (the_line[start]);
- }
- if (!pure_alphabetic (the_line[start]))
- state = 0;
- break;
-
- default:
- abort ();
- return -1;
- }
- }
- rl_point = end;
- return 0;
- }
-
- /* **************************************************************** */
- /* */
- /* Transposition */
- /* */
- /* **************************************************************** */
-
- /* Transpose the words at point. */
- rl_transpose_words (count)
- int count;
- {
- char *word1, *word2;
- int w1_beg, w1_end, w2_beg, w2_end;
- int orig_point = rl_point;
-
- if (!count)
- return 0;
-
- /* Find the two words. */
- rl_forward_word (count);
- w2_end = rl_point;
- rl_backward_word (1);
- w2_beg = rl_point;
- rl_backward_word (count);
- w1_beg = rl_point;
- rl_forward_word (1);
- w1_end = rl_point;
-
- /* Do some check to make sure that there really are two words. */
- if ((w1_beg == w2_beg) || (w2_beg < w1_end))
- {
- ding ();
- rl_point = orig_point;
- return -1;
- }
-
- /* Get the text of the words. */
- word1 = rl_copy_text (w1_beg, w1_end);
- word2 = rl_copy_text (w2_beg, w2_end);
-
- /* We are about to do many insertions and deletions. Remember them
- as one operation. */
- rl_begin_undo_group ();
-
- /* Do the stuff at word2 first, so that we don't have to worry
- about word1 moving. */
- rl_point = w2_beg;
- rl_delete_text (w2_beg, w2_end);
- rl_insert_text (word1);
-
- rl_point = w1_beg;
- rl_delete_text (w1_beg, w1_end);
- rl_insert_text (word2);
-
- /* This is exactly correct since the text before this point has not
- changed in length. */
- rl_point = w2_end;
-
- /* I think that does it. */
- rl_end_undo_group ();
- free (word1);
- free (word2);
-
- return 0;
- }
-
- /* Transpose the characters at point. If point is at the end of the line,
- then transpose the characters before point. */
- rl_transpose_chars (count)
- int count;
- {
- char dummy[2];
-
- if (!count)
- return 0;
-
- if (!rl_point || rl_end < 2)
- {
- ding ();
- return -1;
- }
-
- rl_begin_undo_group ();
-
- if (rl_point == rl_end)
- {
- --rl_point;
- count = 1;
- }
- rl_point--;
-
- dummy[0] = the_line[rl_point];
- dummy[1] = '\0';
-
- rl_delete_text (rl_point, rl_point + 1);
-
- rl_point += count;
- if (rl_point > rl_end)
- rl_point = rl_end;
- else if (rl_point < 0)
- rl_point = 0;
- rl_insert_text (dummy);
-
- rl_end_undo_group ();
- return 0;
- }
-
- /* **************************************************************** */
- /* */
- /* Undo, and Undoing */
- /* */
- /* **************************************************************** */
-
- /* The current undo list for THE_LINE. */
- UNDO_LIST *rl_undo_list = (UNDO_LIST *)NULL;
-
- /* Remember how to undo something. Concatenate some undos if that
- seems right. */
- void
- rl_add_undo (what, start, end, text)
- enum undo_code what;
- int start, end;
- char *text;
- {
- UNDO_LIST *temp = (UNDO_LIST *)xmalloc (sizeof (UNDO_LIST));
- temp->what = what;
- temp->start = start;
- temp->end = end;
- temp->text = text;
- temp->next = rl_undo_list;
- rl_undo_list = temp;
- }
-
- /* Free the existing undo list. */
- void
- free_undo_list ()
- {
- while (rl_undo_list)
- {
- UNDO_LIST *release = rl_undo_list;
- rl_undo_list = rl_undo_list->next;
-
- if (release->what == UNDO_DELETE)
- free (release->text);
-
- free (release);
- }
- rl_undo_list = (UNDO_LIST *)NULL;
- }
-
- /* Undo the next thing in the list. Return 0 if there
- is nothing to undo, or non-zero if there was. */
- int
- rl_do_undo ()
- {
- UNDO_LIST *release;
- int waiting_for_begin = 0;
-
- undo_thing:
- if (!rl_undo_list)
- return (0);
-
- doing_an_undo = 1;
-
- switch (rl_undo_list->what) {
-
- /* Undoing deletes means inserting some text. */
- case UNDO_DELETE:
- rl_point = rl_undo_list->start;
- rl_insert_text (rl_undo_list->text);
- free (rl_undo_list->text);
- break;
-
- /* Undoing inserts means deleting some text. */
- case UNDO_INSERT:
- rl_delete_text (rl_undo_list->start, rl_undo_list->end);
- rl_point = rl_undo_list->start;
- break;
-
- /* Undoing an END means undoing everything 'til we get to
- a BEGIN. */
- case UNDO_END:
- waiting_for_begin++;
- break;
-
- /* Undoing a BEGIN means that we are done with this group. */
- case UNDO_BEGIN:
- if (waiting_for_begin)
- waiting_for_begin--;
- else
- #if 0
- abort ();
- #else
- ding ();
- #endif
- break;
- }
-
- doing_an_undo = 0;
-
- release = rl_undo_list;
- rl_undo_list = rl_undo_list->next;
- free (release);
-
- if (waiting_for_begin)
- goto undo_thing;
-
- return (1);
- }
-
- /* Begin a group. Subsequent undos are undone as an atomic operation. */
- rl_begin_undo_group ()
- {
- rl_add_undo (UNDO_BEGIN, 0, 0, 0);
- return 0;
- }
-
- /* End an undo group started with rl_begin_undo_group (). */
- rl_end_undo_group ()
- {
- rl_add_undo (UNDO_END, 0, 0, 0);
- return 0;
- }
-
- /* Save an undo entry for the text from START to END. */
- rl_modifying (start, end)
- int start, end;
- {
- if (start > end)
- {
- int t = start;
- start = end;
- end = t;
- }
-
- if (start != end)
- {
- char *temp = rl_copy_text (start, end);
- rl_begin_undo_group ();
- rl_add_undo (UNDO_DELETE, start, end, temp);
- rl_add_undo (UNDO_INSERT, start, end, (char *)NULL);
- rl_end_undo_group ();
- }
- return 0;
- }
-
- /* Revert the current line to its previous state. */
- rl_revert_line ()
- {
- if (!rl_undo_list)
- ding ();
- else
- {
- while (rl_undo_list)
- rl_do_undo ();
- }
- return 0;
- }
-
- /* Do some undoing of things that were done. */
- rl_undo_command (count)
- int count;
- {
- if (count < 0)
- return 0; /* Nothing to do. */
-
- while (count)
- {
- if (rl_do_undo ())
- count--;
- else
- {
- ding ();
- break;
- }
- }
- return 0;
- }
-
- /* **************************************************************** */
- /* */
- /* History Utilities */
- /* */
- /* **************************************************************** */
-
- /* We already have a history library, and that is what we use to control
- the history features of readline. However, this is our local interface
- to the history mechanism. */
-
- /* While we are editing the history, this is the saved
- version of the original line. */
- HIST_ENTRY *saved_line_for_history = (HIST_ENTRY *)NULL;
-
- /* Set the history pointer back to the last entry in the history. */
- start_using_history ()
- {
- using_history ();
- if (saved_line_for_history)
- free_history_entry (saved_line_for_history);
-
- saved_line_for_history = (HIST_ENTRY *)NULL;
- return 0;
- }
-
- /* Free the contents (and containing structure) of a HIST_ENTRY. */
- void
- free_history_entry (entry)
- HIST_ENTRY *entry;
- {
- if (!entry)
- return;
- if (entry->line)
- free (entry->line);
- free (entry);
- }
-
- /* Perhaps put back the current line if it has changed. */
- maybe_replace_line ()
- {
- HIST_ENTRY *temp = current_history ();
-
- /* If the current line has changed, save the changes. */
- if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list))
- {
- temp = replace_history_entry (where_history (), the_line, rl_undo_list);
- free (temp->line);
- free (temp);
- }
- return 0;
- }
-
- /* Put back the saved_line_for_history if there is one. */
- maybe_unsave_line ()
- {
- if (saved_line_for_history)
- {
- int line_len;
-
- line_len = strlen (saved_line_for_history->line);
-
- if (line_len >= rl_line_buffer_len)
- rl_extend_line_buffer (line_len);
-
- strcpy (the_line, saved_line_for_history->line);
- rl_undo_list = (UNDO_LIST *)saved_line_for_history->data;
- free_history_entry (saved_line_for_history);
- saved_line_for_history = (HIST_ENTRY *)NULL;
- rl_end = rl_point = strlen (the_line);
- }
- else
- ding ();
- return 0;
- }
-
- /* Save the current line in saved_line_for_history. */
- maybe_save_line ()
- {
- if (!saved_line_for_history)
- {
- saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
- saved_line_for_history->line = savestring (the_line);
- saved_line_for_history->data = (char *)rl_undo_list;
- }
- return 0;
- }
-
- /* **************************************************************** */
- /* */
- /* History Commands */
- /* */
- /* **************************************************************** */
-
- /* Meta-< goes to the start of the history. */
- rl_beginning_of_history ()
- {
- return (rl_get_previous_history (1 + where_history ()));
- }
-
- /* Meta-> goes to the end of the history. (The current line). */
- rl_end_of_history ()
- {
- maybe_replace_line ();
- using_history ();
- maybe_unsave_line ();
- return 0;
- }
-
- /* Move down to the next history line. */
- rl_get_next_history (count)
- int count;
- {
- HIST_ENTRY *temp = (HIST_ENTRY *)NULL;
-
- if (count < 0)
- return (rl_get_previous_history (-count));
-
- if (!count)
- return 0;
-
- maybe_replace_line ();
-
- while (count)
- {
- temp = next_history ();
- if (!temp)
- break;
- --count;
- }
-
- if (!temp)
- maybe_unsave_line ();
- else
- {
- int line_len;
-
- line_len = strlen (temp->line);
-
- if (line_len >= rl_line_buffer_len)
- rl_extend_line_buffer (line_len);
-
- strcpy (the_line, temp->line);
- rl_undo_list = (UNDO_LIST *)temp->data;
- rl_end = rl_point = strlen (the_line);
- #if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- rl_point = 0;
- #endif /* VI_MODE */
- }
- return 0;
- }
-
- /* Get the previous item out of our interactive history, making it the current
- line. If there is no previous history, just ding. */
- rl_get_previous_history (count)
- int count;
- {
- HIST_ENTRY *old_temp = (HIST_ENTRY *)NULL;
- HIST_ENTRY *temp = (HIST_ENTRY *)NULL;
-
- if (count < 0)
- return (rl_get_next_history (-count));
-
- if (!count)
- return 0;
-
- /* If we don't have a line saved, then save this one. */
- maybe_save_line ();
-
- /* If the current line has changed, save the changes. */
- maybe_replace_line ();
-
- while (count)
- {
- temp = previous_history ();
- if (!temp)
- break;
- else
- old_temp = temp;
- --count;
- }
-
- /* If there was a large argument, and we moved back to the start of the
- history, that is not an error. So use the last value found. */
- if (!temp && old_temp)
- temp = old_temp;
-
- if (!temp)
- ding ();
- else
- {
- int line_len;
-
- line_len = strlen (temp->line);
-
- if (line_len >= rl_line_buffer_len)
- rl_extend_line_buffer (line_len);
-
- strcpy (the_line, temp->line);
- rl_undo_list = (UNDO_LIST *)temp->data;
- rl_end = rl_point = line_len;
-
- #if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- rl_point = 0;
- #endif /* VI_MODE */
- }
- return 0;
- }
-
- /* Make C be the next command to be executed. */
- rl_execute_next (c)
- int c;
- {
- rl_pending_input = c;
- return 0;
- }
-
- /* **************************************************************** */
- /* */
- /* The Mark and the Region. */
- /* */
- /* **************************************************************** */
-
- /* Set the mark at POSITION. */
- rl_set_mark (position)
- int position;
- {
- if (position > rl_end)
- return -1;
-
- rl_mark = position;
- return 0;
- }
-
- /* Exchange the position of mark and point. */
- rl_exchange_mark_and_point ()
- {
- if (rl_mark > rl_end)
- rl_mark = -1;
-
- if (rl_mark == -1)
- {
- ding ();
- return -1;
- }
- else
- {
- int temp = rl_point;
-
- rl_point = rl_mark;
- rl_mark = temp;
- }
- return 0;
- }
-
-
- /* **************************************************************** */
- /* */
- /* Killing Mechanism */
- /* */
- /* **************************************************************** */
-
- /* What we assume for a max number of kills. */
- #define DEFAULT_MAX_KILLS 10
-
- /* The real variable to look at to find out when to flush kills. */
- int rl_max_kills = DEFAULT_MAX_KILLS;
-
- /* Where to store killed text. */
- char **rl_kill_ring = (char **)NULL;
-
- /* Where we are in the kill ring. */
- int rl_kill_index = 0;
-
- /* How many slots we have in the kill ring. */
- int rl_kill_ring_length = 0;
-
- /* How to say that you only want to save a certain amount
- of kill material. */
- rl_set_retained_kills (num)
- int num;
- {
- return 0;
- }
-
- /* The way to kill something. This appends or prepends to the last
- kill, if the last command was a kill command. if FROM is less
- than TO, then the text is appended, otherwise prepended. If the
- last command was not a kill command, then a new slot is made for
- this kill. */
- rl_kill_text (from, to)
- int from, to;
- {
- int slot;
- char *text = rl_copy_text (from, to);
-
- /* Is there anything to kill? */
- if (from == to)
- {
- free (text);
- last_command_was_kill++;
- return 0;
- }
-
- /* Delete the copied text from the line. */
- rl_delete_text (from, to);
-
- /* First, find the slot to work with. */
- if (!last_command_was_kill)
- {
- /* Get a new slot. */
- if (!rl_kill_ring)
- {
- /* If we don't have any defined, then make one. */
- rl_kill_ring = (char **)
- xmalloc (((rl_kill_ring_length = 1) + 1) * sizeof (char *));
- slot = 1;
- }
- else
- {
- /* We have to add a new slot on the end, unless we have
- exceeded the max limit for remembering kills. */
- slot = rl_kill_ring_length;
- if (slot == rl_max_kills)
- {
- register int i;
- free (rl_kill_ring[0]);
- for (i = 0; i < slot; i++)
- rl_kill_ring[i] = rl_kill_ring[i + 1];
- }
- else
- {
- rl_kill_ring =
- (char **)
- xrealloc (rl_kill_ring,
- ((slot = (rl_kill_ring_length += 1)) + 1)
- * sizeof (char *));
- }
- }
- slot--;
- }
- else
- {
- slot = rl_kill_ring_length - 1;
- }
-
- /* If the last command was a kill, prepend or append. */
- if (last_command_was_kill && rl_editing_mode != vi_mode)
- {
- char *old = rl_kill_ring[slot];
- char *new = (char *)xmalloc (1 + strlen (old) + strlen (text));
-
- if (from < to)
- {
- strcpy (new, old);
- strcat (new, text);
- }
- else
- {
- strcpy (new, text);
- strcat (new, old);
- }
- free (old);
- free (text);
- rl_kill_ring[slot] = new;
- }
- else
- {
- rl_kill_ring[slot] = text;
- }
- rl_kill_index = slot;
- last_command_was_kill++;
- return 0;
- }
-
- /* Now REMEMBER! In order to do prepending or appending correctly, kill
- commands always make rl_point's original position be the FROM argument,
- and rl_point's extent be the TO argument. */
-
- /* **************************************************************** */
- /* */
- /* Killing Commands */
- /* */
- /* **************************************************************** */
-
- /* Delete the word at point, saving the text in the kill ring. */
- rl_kill_word (count)
- int count;
- {
- int orig_point = rl_point;
-
- if (count < 0)
- return (rl_backward_kill_word (-count));
- else
- {
- rl_forward_word (count);
-
- if (rl_point != orig_point)
- rl_kill_text (orig_point, rl_point);
-
- rl_point = orig_point;
- }
- return 0;
- }
-
- /* Rubout the word before point, placing it on the kill ring. */
- rl_backward_kill_word (count)
- int count;
- {
- int orig_point = rl_point;
-
- if (count < 0)
- return (rl_kill_word (-count));
- else
- {
- rl_backward_word (count);
-
- if (rl_point != orig_point)
- rl_kill_text (orig_point, rl_point);
- }
- }
-
- /* Kill from here to the end of the line. If DIRECTION is negative, kill
- back to the line start instead. */
- rl_kill_line (direction)
- int direction;
- {
- int orig_point = rl_point;
-
- if (direction < 0)
- return (rl_backward_kill_line (1));
- else
- {
- rl_end_of_line ();
- if (orig_point != rl_point)
- rl_kill_text (orig_point, rl_point);
- rl_point = orig_point;
- }
- return 0;
- }
-
- /* Kill backwards to the start of the line. If DIRECTION is negative, kill
- forwards to the line end instead. */
- rl_backward_kill_line (direction)
- int direction;
- {
- int orig_point = rl_point;
-
- if (direction < 0)
- return (rl_kill_line (1));
- else
- {
- if (!rl_point)
- ding ();
- else
- {
- rl_beg_of_line ();
- rl_kill_text (orig_point, rl_point);
- }
- }
- return 0;
- }
-
- /* Yank back the last killed text. This ignores arguments. */
- rl_yank ()
- {
- if (!rl_kill_ring)
- {
- rl_abort ();
- return -1;
- }
-
- rl_set_mark (rl_point);
- rl_insert_text (rl_kill_ring[rl_kill_index]);
- return 0;
- }
-
- /* If the last command was yank, or yank_pop, and the text just
- before point is identical to the current kill item, then
- delete that text from the line, rotate the index down, and
- yank back some other text. */
- rl_yank_pop ()
- {
- int l;
-
- if (((rl_last_func != rl_yank_pop) && (rl_last_func != rl_yank)) ||
- !rl_kill_ring)
- {
- rl_abort ();
- return -1;
- }
-
- l = strlen (rl_kill_ring[rl_kill_index]);
- if (((rl_point - l) >= 0) &&
- (strncmp (the_line + (rl_point - l),
- rl_kill_ring[rl_kill_index], l) == 0))
- {
- rl_delete_text ((rl_point - l), rl_point);
- rl_point -= l;
- rl_kill_index--;
- if (rl_kill_index < 0)
- rl_kill_index = rl_kill_ring_length - 1;
- rl_yank ();
- return 0;
- }
- else
- {
- rl_abort ();
- return -1;
- }
- }
-
- /* Yank the COUNTth argument from the previous history line. */
- rl_yank_nth_arg (count, ignore)
- int count;
- {
- register HIST_ENTRY *entry = previous_history ();
- char *arg;
-
- if (entry)
- next_history ();
- else
- {
- ding ();
- return -1;
- }
-
- arg = history_arg_extract (count, count, entry->line);
- if (!arg || !*arg)
- {
- ding ();
- return -1;
- }
-
- rl_begin_undo_group ();
-
- #if defined (VI_MODE)
- /* Vi mode always inserts a space before yanking the argument, and it
- inserts it right *after* rl_point. */
- if (rl_editing_mode == vi_mode)
- rl_point++;
- #endif /* VI_MODE */
-
- #if 0
- if (rl_point && the_line[rl_point - 1] != ' ')
- rl_insert_text (" ");
- #endif
-
- rl_insert_text (arg);
- free (arg);
-
- rl_end_undo_group ();
- return 0;
- }
-
- /* How to toggle back and forth between editing modes. */
- rl_vi_editing_mode ()
- {
- #if defined (VI_MODE)
- rl_editing_mode = vi_mode;
- rl_vi_insertion_mode ();
- return 0;
- #endif /* VI_MODE */
- }
-
- rl_emacs_editing_mode ()
- {
- rl_editing_mode = emacs_mode;
- _rl_keymap = emacs_standard_keymap;
- return 0;
- }
-
-
- /* **************************************************************** */
- /* */
- /* USG (System V) Support */
- /* */
- /* **************************************************************** */
-
- int
- rl_getc (stream)
- FILE *stream;
- {
- int result;
- unsigned char c;
-
- #if defined (MINIMAL)
- if (isatty (0))
- return (getkey () & 0x7f);
- #endif /* MINIMAL */
-
- while (1)
- {
- result = read (fileno (stream), &c, sizeof (unsigned char));
-
- if (result == sizeof (unsigned char))
- return (c);
-
- /* If zero characters are returned, then the file that we are
- reading from is empty! Return EOF in that case. */
- if (result == 0)
- return (EOF);
-
- #if defined (EWOULDBLOCK)
- if (errno == EWOULDBLOCK)
- {
- int flags;
-
- if ((flags = fcntl (fileno (stream), F_GETFL, 0)) < 0)
- return (EOF);
- if (flags & O_NDELAY)
- {
- flags &= ~O_NDELAY;
- fcntl (fileno (stream), F_SETFL, flags);
- continue;
- }
- continue;
- }
- #endif /* EWOULDBLOCK */
-
- #if defined (_POSIX_VERSION) && defined (EAGAIN) && defined (O_NONBLOCK)
- if (errno == EAGAIN)
- {
- int flags;
-
- if ((flags = fcntl (fileno (stream), F_GETFL, 0)) < 0)
- return (EOF);
- if (flags & O_NONBLOCK)
- {
- flags &= ~O_NONBLOCK;
- fcntl (fileno (stream), F_SETFL, flags);
- continue;
- }
- }
- #endif /* _POSIX_VERSION && EAGAIN && O_NONBLOCK */
-
- #if !defined (MINIMAL)
- /* If the error that we received was SIGINT, then try again,
- this is simply an interrupted system call to read ().
- Otherwise, some error ocurred, also signifying EOF. */
- if (errno != EINTR)
- return (EOF);
- #endif /* !MINIMAL */
- }
- }
-
- char *
- _rl_savestring (str)
- char *str;
- {
- char *copy = (char*) xmalloc (strlen (str) + 1);
- strcpy (copy, str);
- return copy;
- }
-
- #if defined (STATIC_MALLOC)
-
- /* **************************************************************** */
- /* */
- /* xmalloc and xrealloc () */
- /* */
- /* **************************************************************** */
-
- static void memory_error_and_abort ();
-
- static char *
- xmalloc (bytes)
- int bytes;
- {
- char *temp = (char *)malloc (bytes);
-
- if (!temp)
- memory_error_and_abort ();
- return (temp);
- }
-
- static char *
- xrealloc (pointer, bytes)
- char *pointer;
- int bytes;
- {
- char *temp;
-
- if (!pointer)
- temp = (char *)malloc (bytes);
- else
- temp = (char *)realloc (pointer, bytes);
-
- if (!temp)
- memory_error_and_abort ();
-
- return (temp);
- }
-
- static void
- memory_error_and_abort ()
- {
- fprintf (stderr, "readline: Out of virtual memory!\n");
- abort ();
- }
- #endif /* STATIC_MALLOC */
-
-
- /* **************************************************************** */
- /* */
- /* Testing Readline */
- /* */
- /* **************************************************************** */
-
- #if defined (TEST)
-
- main ()
- {
- HIST_ENTRY **history_list ();
- char *temp = (char *)NULL;
- char *prompt = "readline% ";
- int done = 0;
-
- while (!done)
- {
- temp = readline (prompt);
-
- /* Test for EOF. */
- if (!temp)
- exit (1);
-
- /* If there is anything on the line, print it and remember it. */
- if (*temp)
- {
- fprintf (stderr, "%s\r\n", temp);
- add_history (temp);
- }
-
- /* Check for `command' that we handle. */
- if (strcmp (temp, "quit") == 0)
- done = 1;
-
- if (strcmp (temp, "list") == 0)
- {
- HIST_ENTRY **list = history_list ();
- register int i;
- if (list)
- {
- for (i = 0; list[i]; i++)
- {
- fprintf (stderr, "%d: %s\r\n", i, list[i]->line);
- free (list[i]->line);
- }
- free (list);
- }
- }
- free (temp);
- }
- }
-
- #endif /* TEST */
-
-
- /*
- * Local variables:
- * compile-command: "gcc -g -traditional -I. -I.. -DTEST -o readline readline.c keymaps.o funmap.o history.o -ltermcap"
- * end:
- */
-