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-rw-r--r--gnu/usr.bin/gdb/readline/readline.c5557
1 files changed, 5557 insertions, 0 deletions
diff --git a/gnu/usr.bin/gdb/readline/readline.c b/gnu/usr.bin/gdb/readline/readline.c
new file mode 100644
index 000000000000..3e8f9a38a1d8
--- /dev/null
+++ b/gnu/usr.bin/gdb/readline/readline.c
@@ -0,0 +1,5557 @@
+/*-
+ * This code is derived from software copyrighted by the Free Software
+ * Foundation.
+ *
+ * Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
+ * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)readline.c 6.4 (Berkeley) 5/8/91";
+#endif /* not lint */
+
+/* readline.c -- a general facility for reading lines of input
+ with emacs style editing and completion. */
+
+/* Copyright (C) 1987,1989 Free Software Foundation, Inc.
+
+ This file contains the Readline Library (the Library), a set of
+ routines for providing Emacs style line input to programs that ask
+ for it.
+
+ The 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 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. */
+
+/* Remove these declarations when we have a complete libgnu.a. */
+#define STATIC_MALLOC
+#ifndef STATIC_MALLOC
+extern char *xmalloc (), *xrealloc ();
+#else
+static char *xmalloc (), *xrealloc ();
+#endif
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/file.h>
+#include <signal.h>
+#include <string.h>
+
+#ifdef __GNUC__
+#define alloca __builtin_alloca
+#else
+#if defined (sparc) && defined (sun)
+#include <alloca.h>
+#endif
+#endif
+
+#define NEW_TTY_DRIVER
+#if defined (SYSV) || defined (hpux)
+#undef NEW_TTY_DRIVER
+#include <termio.h>
+#else
+#include <sgtty.h>
+#endif
+
+#include <errno.h>
+extern int errno;
+
+#include <setjmp.h>
+
+/* These next are for filename completion. Perhaps this belongs
+ in a different place. */
+#include <sys/stat.h>
+
+#include <pwd.h>
+#ifdef SYSV
+struct passwd *getpwuid (), *getpwent ();
+#endif
+
+#define HACK_TERMCAP_MOTION
+
+#ifndef SYSV
+#include <sys/dir.h>
+#else /* SYSV */
+#ifdef hpux
+#include <ndir.h>
+#else
+#include <dirent.h>
+#define direct dirent
+#define d_namlen d_reclen
+#endif /* hpux */
+#endif /* SYSV */
+
+/* Some standard library routines. */
+#include "readline.h"
+#include "history.h"
+
+#ifndef digit
+#define digit(c) ((c) >= '0' && (c) <= '9')
+#endif
+
+#ifndef isletter
+#define isletter(c) (((c) >= 'A' && (c) <= 'Z') || ((c) >= 'a' && (c) <= 'z'))
+#endif
+
+#ifndef digit_value
+#define digit_value(c) ((c) - '0')
+#endif
+
+#ifndef member
+char *index ();
+#define member(c, s) ((c) ? index ((s), (c)) : 0)
+#endif
+
+#ifndef isident
+#define isident(c) ((isletter(c) || digit(c) || c == '_'))
+#endif
+
+#ifndef exchange
+#define exchange(x, y) {int temp = x; x = y; y = temp;}
+#endif
+
+static update_line ();
+static void output_character_function ();
+static delete_chars ();
+static start_insert ();
+static end_insert ();
+
+/* This typedef is equivalant to the one for Function; it allows us
+ to say SigHandler *foo = signal (SIGKILL, SIG_IGN); */
+typedef void SigHandler ();
+
+#ifdef SIGWINCH
+static void rl_handle_sigwinch ();
+static SigHandler *old_sigwinch = (SigHandler *)NULL;
+#endif
+
+/* If on, then readline handles signals in a way that doesn't screw. */
+/* #define HANDLE_SIGNALS */
+
+#if defined (SYSV)
+#ifdef HANDLE_SIGNALS
+#undef HANDLE_SIGNALS
+#endif
+#endif
+
+/* Stupid comparison routine for qsort () ing strings. */
+static int
+compare_strings (s1, s2)
+ char **s1, **s2;
+{
+ return (strcmp (*s1, *s2));
+}
+
+
+/* **************************************************************** */
+/* */
+/* Line editing input utility */
+/* */
+/* **************************************************************** */
+
+/* A pointer to the keymap that is currently in use.
+ By default, it is the standard emacs keymap. */
+Keymap keymap = emacs_standard_keymap;
+
+#define vi_mode 0
+#define emacs_mode 1
+
+/* 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. */
+static int 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 = stdin, *rl_outstream = stdout;
+
+/* 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. */
+static int 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;
+
+/* Line buffer and maintenence. */
+char *rl_line_buffer = (char *)NULL;
+static int rl_line_buffer_len = 0;
+#define DEFAULT_BUFFER_SIZE 256
+
+
+/* **************************************************************** */
+/* */
+/* Top Level Functions */
+/* */
+/* **************************************************************** */
+
+/* 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;
+{
+ static rl_prep_terminal (), rl_deprep_terminal ();
+ 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 ();
+
+#ifdef SIGWINCH
+ old_sigwinch = (SigHandler *)signal (SIGWINCH, rl_handle_sigwinch);
+#endif
+
+#ifdef HANDLE_SIGNALS
+ rl_set_signals ();
+#endif
+
+ value = readline_internal ();
+ rl_deprep_terminal ();
+
+#ifdef SIGWINCH
+ signal (SIGWINCH, old_sigwinch);
+#endif
+
+#ifdef 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 = 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 ();
+#ifdef 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 = 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 eof_char typed to blank line, and not as the
+ previous character is interpreted as EOF. */
+ if (((c == eof_char && lastc != c) || c == EOF) && !rl_end)
+ {
+ eof_found = 1;
+ break;
+ }
+
+ lastc = c;
+ rl_dispatch (c, 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;
+ }
+
+#ifdef 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 && keymap == vi_movement_keymap)
+ rl_vi_check ();
+#endif
+
+ 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));
+}
+
+
+/* Variables for 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;
+
+/* Non-zero means to save keys that we dispatch on in a kbd macro. */
+static int defining_kbd_macro = 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;
+
+
+/* **************************************************************** */
+/* */
+/* Signal Handling */
+/* */
+/* **************************************************************** */
+
+#ifdef SIGWINCH
+static void
+rl_handle_sigwinch (sig, code, scp)
+ int sig, code;
+ struct sigcontext *scp;
+{
+ char *term = rl_terminal_name, *getenv ();
+
+ if (readline_echoing_p)
+ {
+ if (!term)
+ term = getenv ("TERM");
+ if (!term)
+ term = "dumb";
+ rl_reset_terminal (term);
+#ifdef NEVER
+ crlf ();
+ rl_forced_update_display ();
+#endif
+ }
+
+ if (old_sigwinch &&
+ old_sigwinch != (SigHandler *)SIG_IGN &&
+ old_sigwinch != (SigHandler *)SIG_DFL)
+ (*old_sigwinch)(sig, code, scp);
+}
+#endif /* SIGWINCH */
+
+#ifdef HANDLE_SIGNALS
+/* Interrupt handling. */
+static SigHandler *old_int = (SigHandler *)NULL,
+ *old_tstp = (SigHandler *)NULL,
+ *old_ttou = (SigHandler *)NULL,
+ *old_ttin = (SigHandler *)NULL,
+ *old_cont = (SigHandler *)NULL;
+
+/* Handle an interrupt character. */
+static void
+rl_signal_handler (sig, code, scp)
+ int sig, code;
+ struct sigcontext *scp;
+{
+ static rl_prep_terminal (), rl_deprep_terminal ();
+
+ switch (sig)
+ {
+ case SIGINT:
+ free_undo_list ();
+ rl_clear_message ();
+ rl_init_argument ();
+#ifdef SIGWINCH
+ signal (SIGWINCH, old_sigwinch);
+#endif
+
+#ifdef SIGTSTP
+ case SIGTSTP:
+ case SIGTTOU:
+ case SIGTTIN:
+#endif
+
+ rl_clean_up_for_exit ();
+ rl_deprep_terminal ();
+ rl_clear_signals ();
+ rl_pending_input = 0;
+
+ kill (getpid (), sig);
+ sigsetmask (0);
+
+ rl_prep_terminal ();
+ rl_set_signals ();
+ }
+}
+
+rl_set_signals ()
+{
+ old_int = (SigHandler *)signal (SIGINT, rl_signal_handler);
+
+ if (old_int == (SigHandler *)SIG_IGN)
+ signal (SIGINT, SIG_IGN);
+
+#ifdef SIGTSTP
+ old_tstp = (SigHandler *)signal (SIGTSTP, rl_signal_handler);
+ if (old_tstp == (SigHandler *)SIG_IGN)
+ signal (SIGTSTP, SIG_IGN);
+#endif
+#ifdef SIGTTOU
+ old_ttou = (SigHandler *)signal (SIGTTOU, rl_signal_handler);
+ old_ttin = (SigHandler *)signal (SIGTTIN, rl_signal_handler);
+#endif
+}
+
+rl_clear_signals ()
+{
+ signal (SIGINT, old_int);
+
+#ifdef SIGTSTP
+ signal (SIGTSTP, old_tstp);
+#endif
+#ifdef SIGTTOU
+ signal (SIGTTOU, old_ttou);
+ signal (SIGTTIN, old_ttin);
+#endif
+}
+#endif /* HANDLE_SIGNALS */
+
+
+
+/* **************************************************************** */
+/* */
+/* Character Input Buffering */
+/* */
+/* **************************************************************** */
+
+/* If the terminal was in xoff state when we got to it, then xon_char
+ contains the character that is supposed to start it again. */
+static int xon_char, xoff_state;
+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.
+ Result is KEY if there was a key, or -2 if there wasn't. */
+int
+rl_get_char ()
+{
+ int key;
+
+ if (push_index == pop_index)
+ return (-2);
+
+ key = ibuffer[pop_index++];
+
+ if (pop_index >= ibuffer_len)
+ pop_index = 0;
+
+ return (key);
+}
+
+/* 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);
+}
+
+
+
+static void
+rl_getc (stream)
+ FILE *stream;
+{
+ int result;
+ int nchar;
+ int tty = fileno(stream);
+ char buf[512]; /* XXX - must be at least as large as ibuffer */
+
+ while (1)
+ {
+ if (ioctl(tty, FIONREAD, &nchar) == -1)
+ nchar = sizeof(buf);
+ else if (nchar <= 0)
+ nchar = 1;
+ result = ibuffer_space();
+ if (nchar > result)
+ nchar = result;
+ result = read(tty, buf, nchar);
+ if (result > 0)
+ {
+ register char *cp = buf;
+
+ while (--result >= 0)
+ rl_stuff_char(*cp++);
+ return;
+ }
+ if (errno != EINTR)
+ {
+ rl_stuff_char(EOF);
+ return;
+ }
+ }
+}
+
+/* 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
+ {
+ static int next_macro_key ();
+
+ /* If input is coming from a macro, then use that. */
+ if (c = next_macro_key ())
+ return (c);
+
+ while ((c = rl_get_char()) == -2)
+ {
+ if (rl_event_hook)
+ {
+ (*rl_event_hook) ();
+ if ((c = rl_get_char()) != -2)
+ return (c);
+ }
+ rl_getc(in_stream);
+ }
+ }
+#ifdef TIOCSTART
+ /* Ugh. But I can't think of a better way. */
+ if (xoff_state && c == xon_char)
+ {
+ ioctl (fileno (in_stream), TIOCSTART, 0);
+ xoff_state = 0;
+ return rl_read_key ();
+ }
+#endif /* TIOCSTART */
+ return (c);
+}
+
+/* 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. */
+rl_dispatch (key, map)
+ register int key;
+ Keymap map;
+{
+ if (defining_kbd_macro)
+ {
+ static add_macro_char ();
+
+ add_macro_char (key);
+ }
+
+ if (key > 127 && key < 256)
+ {
+ if (map[ESC].type == ISKMAP)
+ {
+ map = (Keymap)map[ESC].function;
+ key -= 128;
+ 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 * arg_sign, key);
+ }
+ else
+ {
+ ding ();
+ return;
+ }
+ }
+ break;
+
+ case ISKMAP:
+ if (map[key].function != (Function *)NULL)
+ {
+ int newkey;
+
+ rl_key_sequence_length++;
+ newkey = rl_read_key ();
+ rl_dispatch (newkey, (Keymap)map[key].function);
+ }
+ else
+ {
+ ding ();
+ return;
+ }
+ break;
+
+ case ISMACR:
+ if (map[key].function != (Function *)NULL)
+ {
+ static with_macro_input ();
+ char *macro = savestring ((char *)map[key].function);
+
+ with_macro_input (macro);
+ return;
+ }
+ break;
+ }
+
+ /* If we have input pending, then the last command was a prefix
+ command. Don't change the state of rl_last_func. */
+ if (!rl_pending_input)
+ rl_last_func = map[key].function;
+}
+
+
+/* **************************************************************** */
+/* */
+/* Hacking Keyboard Macros */
+/* */
+/* **************************************************************** */
+
+/* Set up to read subsequent input from STRING.
+ STRING is free ()'ed when we are done with it. */
+static
+with_macro_input (string)
+ char *string;
+{
+ static push_executing_macro ();
+
+ 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])
+ {
+ static pop_executing_macro ();
+
+ 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
+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
+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
+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 ();
+
+ while (count--)
+ with_macro_input (savestring (current_macro));
+}
+
+
+/* Non-zero means do not parse any lines other than comments and
+ parser directives. */
+static unsigned char parsing_conditionalized_out = 0;
+
+/* **************************************************************** */
+/* */
+/* Initializations */
+/* */
+/* **************************************************************** */
+
+/* Initliaze readline (and terminal if not already). */
+rl_initialize ()
+{
+ extern char *rl_display_prompt;
+
+ /* 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. */
+ {
+ extern char *rl_display_prompt;
+ extern int forced_display;
+
+ rl_on_new_line ();
+
+ rl_display_prompt = rl_prompt ? rl_prompt : "";
+ forced_display = 1;
+ }
+
+ /* No such function typed yet. */
+ rl_last_func = (Function *)NULL;
+
+ /* Parsing of key-bindings begins in an enabled state. */
+ {
+ 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 = (char *)getenv ("EMACS");
+
+ /* 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);
+
+ /* Bind tty characters to readline functions. */
+ readline_default_bindings ();
+
+ /* 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. */
+ {
+ extern char *rl_completer_word_break_characters;
+ extern char *rl_basic_word_break_characters;
+
+ 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. */
+readline_default_bindings ()
+{
+#ifdef TIOCGETP
+ struct sgttyb ttybuff;
+ int tty = fileno (rl_instream);
+
+ if (ioctl (tty, TIOCGETP, &ttybuff) != -1)
+ {
+ int erase = ttybuff.sg_erase, kill = ttybuff.sg_kill;
+
+ if (erase != -1 && keymap[erase].type == ISFUNC)
+ keymap[erase].function = rl_rubout;
+
+ if (kill != -1 && keymap[kill].type == ISFUNC)
+ keymap[kill].function = rl_unix_line_discard;
+ }
+
+#ifdef TIOCGLTC
+ {
+ struct ltchars lt;
+
+ if (ioctl (tty, TIOCGLTC, &lt) != -1)
+ {
+ int erase = lt.t_werasc, nextc = lt.t_lnextc;
+
+ if (erase != -1 && keymap[erase].type == ISFUNC)
+ keymap[erase].function = rl_unix_word_rubout;
+
+ if (nextc != -1 && keymap[nextc].type == ISFUNC)
+ keymap[nextc].function = rl_quoted_insert;
+ }
+ }
+#endif /* TIOCGLTC */
+#endif /* TIOCGETP */
+}
+
+
+/* **************************************************************** */
+/* */
+/* 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 = 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) ", arg_sign * rl_numeric_arg);
+ key = c = rl_read_key ();
+
+ if (keymap[c].type == ISFUNC &&
+ 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;
+ arg_sign = -1;
+ }
+ else
+ {
+ rl_clear_message ();
+ rl_dispatch (key, keymap);
+ return;
+ }
+ }
+ }
+}
+
+
+/* **************************************************************** */
+/* */
+/* Display stuff */
+/* */
+/* **************************************************************** */
+
+/* This is the stuff that is hard for me. I never seem to write good
+ display routines in C. Let's see how I do this time. */
+
+/* (PWP) Well... Good for a simple line updater, but totally ignores
+ the problems of input lines longer than the screen width.
+
+ update_line and the code that calls it makes a multiple line,
+ automatically wrapping line update. Carefull attention needs
+ to be paid to the vertical position variables.
+
+ handling of terminals with autowrap on (incl. DEC braindamage)
+ could be improved a bit. Right now I just cheat and decrement
+ screenwidth by one. */
+
+/* Keep two buffers; one which reflects the current contents of the
+ screen, and the other to draw what we think the new contents should
+ be. Then compare the buffers, and make whatever changes to the
+ screen itself that we should. Finally, make the buffer that we
+ just drew into be the one which reflects the current contents of the
+ screen, and place the cursor where it belongs.
+
+ Commands that want to can fix the display themselves, and then let
+ this function know that the display has been fixed by setting the
+ RL_DISPLAY_FIXED variable. This is good for efficiency. */
+
+/* Termcap variables: */
+extern char *term_up, *term_dc, *term_cr;
+extern int screenheight, screenwidth, terminal_can_insert;
+
+/* What YOU turn on when you have handled all redisplay yourself. */
+int rl_display_fixed = 0;
+
+/* The visible cursor position. If you print some text, adjust this. */
+int last_c_pos = 0;
+int last_v_pos = 0;
+
+/* The last left edge of text that was displayed. This is used when
+ doing horizontal scrolling. It shifts in thirds of a screenwidth. */
+static int last_lmargin = 0;
+
+/* The line display buffers. One is the line currently displayed on
+ the screen. The other is the line about to be displayed. */
+static char *visible_line = (char *)NULL;
+static char *invisible_line = (char *)NULL;
+
+/* Number of lines currently on screen minus 1. */
+int vis_botlin = 0;
+
+/* A buffer for `modeline' messages. */
+char msg_buf[128];
+
+/* Non-zero forces the redisplay even if we thought it was unnecessary. */
+int forced_display = 0;
+
+/* The stuff that gets printed out before the actual text of the line.
+ This is usually pointing to rl_prompt. */
+char *rl_display_prompt = (char *)NULL;
+
+/* Default and initial buffer size. Can grow. */
+static int line_size = 1024;
+
+/* Non-zero means to always use horizontal scrolling in line display. */
+int horizontal_scroll_mode = 0;
+
+/* I really disagree with this, but my boss (among others) insists that we
+ support compilers that don't work. I don't think we are gaining by doing
+ so; what is the advantage in producing better code if we can't use it? */
+/* The following two declarations belong inside the
+ function block, not here. */
+static void move_cursor_relative ();
+static void output_some_chars ();
+
+/* Basic redisplay algorithm. */
+rl_redisplay ()
+{
+ register int in, out, c, linenum;
+ register char *line = invisible_line;
+ int c_pos = 0;
+ int inv_botlin = 0; /* Number of lines in newly drawn buffer. */
+
+ extern int readline_echoing_p;
+
+ if (!readline_echoing_p)
+ return;
+
+ if (!rl_display_prompt)
+ rl_display_prompt = "";
+
+ if (!invisible_line)
+ {
+ visible_line = (char *)xmalloc (line_size);
+ invisible_line = (char *)xmalloc (line_size);
+ line = invisible_line;
+ for (in = 0; in < line_size; in++)
+ {
+ visible_line[in] = 0;
+ invisible_line[in] = 1;
+ }
+ rl_on_new_line ();
+ }
+
+ /* Draw the line into the buffer. */
+ c_pos = -1;
+
+ /* Mark the line as modified or not. We only do this for history
+ lines. */
+ out = 0;
+ if (current_history () && rl_undo_list)
+ {
+ line[out++] = '*';
+ line[out] = '\0';
+ }
+
+ /* If someone thought that the redisplay was handled, but the currently
+ visible line has a different modification state than the one about
+ to become visible, then correct the callers misconception. */
+ if (visible_line[0] != invisible_line[0])
+ rl_display_fixed = 0;
+
+ strncpy (line + out, rl_display_prompt, strlen (rl_display_prompt));
+ out += strlen (rl_display_prompt);
+ line[out] = '\0';
+
+ for (in = 0; in < rl_end; in++)
+ {
+ c = the_line[in];
+
+ if (out + 1 >= line_size)
+ {
+ line_size *= 2;
+ visible_line = (char *)xrealloc (visible_line, line_size);
+ invisible_line = (char *)xrealloc (invisible_line, line_size);
+ line = invisible_line;
+ }
+
+ if (in == rl_point)
+ c_pos = out;
+
+ if (c > 127)
+ {
+ line[out++] = 'M';
+ line[out++] = '-';
+ line[out++] = c - 128;
+ }
+#define DISPLAY_TABS
+#ifdef DISPLAY_TABS
+ else if (c == '\t')
+ {
+ register int newout = (out | (int)7) + 1;
+ while (out < newout)
+ line[out++] = ' ';
+ }
+#endif
+ else if (c < 32)
+ {
+ line[out++] = 'C';
+ line[out++] = '-';
+ line[out++] = c + 64;
+ }
+ else
+ line[out++] = c;
+ }
+ line[out] = '\0';
+ if (c_pos < 0)
+ c_pos = out;
+
+ /* PWP: now is when things get a bit hairy. The visible and invisible
+ line buffers are really multiple lines, which would wrap every
+ (screenwidth - 1) characters. Go through each in turn, finding
+ the changed region and updating it. The line order is top to bottom. */
+
+ /* If we can move the cursor up and down, then use multiple lines,
+ otherwise, let long lines display in a single terminal line, and
+ horizontally scroll it. */
+
+ if (!horizontal_scroll_mode && term_up && *term_up)
+ {
+ int total_screen_chars = (screenwidth * screenheight);
+
+ if (!rl_display_fixed || forced_display)
+ {
+ forced_display = 0;
+
+ /* If we have more than a screenful of material to display, then
+ only display a screenful. We should display the last screen,
+ not the first. I'll fix this in a minute. */
+ if (out >= total_screen_chars)
+ out = total_screen_chars - 1;
+
+ /* Number of screen lines to display. */
+ inv_botlin = out / screenwidth;
+
+ /* For each line in the buffer, do the updating display. */
+ for (linenum = 0; linenum <= inv_botlin; linenum++)
+ update_line (linenum > vis_botlin ? ""
+ : &visible_line[linenum * screenwidth],
+ &invisible_line[linenum * screenwidth],
+ linenum);
+
+ /* We may have deleted some lines. If so, clear the left over
+ blank ones at the bottom out. */
+ if (vis_botlin > inv_botlin)
+ {
+ char *tt;
+ for (; linenum <= vis_botlin; linenum++)
+ {
+ tt = &visible_line[linenum * screenwidth];
+ move_vert (linenum);
+ move_cursor_relative (0, tt);
+ clear_to_eol ((linenum == vis_botlin)?
+ strlen (tt) : screenwidth);
+ }
+ }
+ vis_botlin = inv_botlin;
+
+ /* Move the cursor where it should be. */
+ move_vert (c_pos / screenwidth);
+ move_cursor_relative (c_pos % screenwidth,
+ &invisible_line[(c_pos / screenwidth) * screenwidth]);
+ }
+ }
+ else /* Do horizontal scrolling. */
+ {
+ int lmargin;
+
+ /* Always at top line. */
+ last_v_pos = 0;
+
+ /* If the display position of the cursor would be off the edge
+ of the screen, start the display of this line at an offset that
+ leaves the cursor on the screen. */
+ if (c_pos - last_lmargin > screenwidth - 2)
+ lmargin = (c_pos / (screenwidth / 3) - 2) * (screenwidth / 3);
+ else if (c_pos - last_lmargin < 1)
+ lmargin = ((c_pos - 1) / (screenwidth / 3)) * (screenwidth / 3);
+ else
+ lmargin = last_lmargin;
+
+ /* If the first character on the screen isn't the first character
+ in the display line, indicate this with a special character. */
+ if (lmargin > 0)
+ line[lmargin] = '<';
+
+ if (lmargin + screenwidth < out)
+ line[lmargin + screenwidth - 1] = '>';
+
+ if (!rl_display_fixed || forced_display || lmargin != last_lmargin)
+ {
+ forced_display = 0;
+ update_line (&visible_line[last_lmargin],
+ &invisible_line[lmargin], 0);
+
+ move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]);
+ last_lmargin = lmargin;
+ }
+ }
+ fflush (out_stream);
+
+ /* Swap visible and non-visible lines. */
+ {
+ char *temp = visible_line;
+ visible_line = invisible_line;
+ invisible_line = temp;
+ rl_display_fixed = 0;
+ }
+}
+
+/* PWP: update_line() is based on finding the middle difference of each
+ line on the screen; vis:
+
+ /old first difference
+ /beginning of line | /old last same /old EOL
+ v v v v
+old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as
+new: eddie> Oh, my little buggy says to me, as lurgid as
+ ^ ^ ^ ^
+ \beginning of line | \new last same \new end of line
+ \new first difference
+
+ All are character pointers for the sake of speed. Special cases for
+ no differences, as well as for end of line additions must be handeled.
+
+ Could be made even smarter, but this works well enough */
+static
+update_line (old, new, current_line)
+ register char *old, *new;
+ int current_line;
+{
+ register char *ofd, *ols, *oe, *nfd, *nls, *ne;
+ int lendiff, wsatend;
+
+ /* Find first difference. */
+ for (ofd = old, nfd = new;
+ (ofd - old < screenwidth) && *ofd && (*ofd == *nfd);
+ ofd++, nfd++)
+ ;
+
+ /* Move to the end of the screen line. */
+ for (oe = ofd; ((oe - old) < screenwidth) && *oe; oe++);
+ for (ne = nfd; ((ne - new) < screenwidth) && *ne; ne++);
+
+ /* If no difference, continue to next line. */
+ if (ofd == oe && nfd == ne)
+ return;
+
+ wsatend = 1; /* flag for trailing whitespace */
+ ols = oe - 1; /* find last same */
+ nls = ne - 1;
+ while ((*ols == *nls) && (ols > ofd) && (nls > nfd))
+ {
+ if (*ols != ' ')
+ wsatend = 0;
+ ols--;
+ nls--;
+ }
+
+ if (wsatend)
+ {
+ ols = oe;
+ nls = ne;
+ }
+ else if (*ols != *nls)
+ {
+ if (*ols) /* don't step past the NUL */
+ ols++;
+ if (*nls)
+ nls++;
+ }
+
+ move_vert (current_line);
+ move_cursor_relative (ofd - old, old);
+
+ /* if (len (new) > len (old)) */
+ lendiff = (nls - nfd) - (ols - ofd);
+
+ /* Insert (diff(len(old),len(new)) ch */
+ if (lendiff > 0)
+ {
+ if (terminal_can_insert)
+ {
+ extern char *term_IC;
+
+ /* Sometimes it is cheaper to print the characters rather than
+ use the terminal's capabilities. */
+ if ((2 * (ne - nfd)) < lendiff && (!term_IC || !*term_IC))
+ {
+ output_some_chars (nfd, (ne - nfd));
+ last_c_pos += (ne - nfd);
+ }
+ else
+ {
+ if (*ols)
+ {
+ start_insert (lendiff);
+ output_some_chars (nfd, lendiff);
+ last_c_pos += lendiff;
+ end_insert ();
+ }
+ else
+ {
+ /* At the end of a line the characters do not have to
+ be "inserted". They can just be placed on the screen. */
+ output_some_chars (nfd, lendiff);
+ last_c_pos += lendiff;
+ }
+ /* Copy (new) chars to screen from first diff to last match. */
+ if (((nls - nfd) - lendiff) > 0)
+ {
+ output_some_chars (&nfd[lendiff], ((nls - nfd) - lendiff));
+ last_c_pos += ((nls - nfd) - lendiff);
+ }
+ }
+ }
+ else
+ { /* cannot insert chars, write to EOL */
+ output_some_chars (nfd, (ne - nfd));
+ last_c_pos += (ne - nfd);
+ }
+ }
+ else /* Delete characters from line. */
+ {
+ /* If possible and inexpensive to use terminal deletion, then do so. */
+ if (term_dc && (2 * (ne - nfd)) >= (-lendiff))
+ {
+ if (lendiff)
+ delete_chars (-lendiff); /* delete (diff) characters */
+
+ /* Copy (new) chars to screen from first diff to last match */
+ if ((nls - nfd) > 0)
+ {
+ output_some_chars (nfd, (nls - nfd));
+ last_c_pos += (nls - nfd);
+ }
+ }
+ /* Otherwise, print over the existing material. */
+ else
+ {
+ output_some_chars (nfd, (ne - nfd));
+ last_c_pos += (ne - nfd);
+ clear_to_eol ((oe - old) - (ne - new));
+ }
+ }
+}
+
+/* (PWP) tell the update routines that we have moved onto a
+ new (empty) line. */
+rl_on_new_line ()
+{
+ if (visible_line)
+ visible_line[0] = '\0';
+
+ last_c_pos = last_v_pos = 0;
+ vis_botlin = last_lmargin = 0;
+}
+
+/* Actually update the display, period. */
+rl_forced_update_display ()
+{
+ if (visible_line)
+ {
+ register char *temp = visible_line;
+
+ while (*temp) *temp++ = '\0';
+ }
+ rl_on_new_line ();
+ forced_display++;
+ rl_redisplay ();
+}
+
+/* Move the cursor from last_c_pos to NEW, which are buffer indices.
+ DATA is the contents of the screen line of interest; i.e., where
+ the movement is being done. */
+static void
+move_cursor_relative (new, data)
+ int new;
+ char *data;
+{
+ register int i;
+ static void output_character_function ();
+
+ /* It may be faster to output a CR, and then move forwards instead
+ of moving backwards. */
+ if (new + 1 < last_c_pos - new)
+ {
+ tputs (term_cr, 1, output_character_function);
+ last_c_pos = 0;
+ }
+
+ if (last_c_pos == new) return;
+
+ if (last_c_pos < new)
+ {
+ /* Move the cursor forward. We do it by printing the command
+ to move the cursor forward if there is one, else print that
+ portion of the output buffer again. Which is cheaper? */
+
+ /* The above comment is left here for posterity. It is faster
+ to print one character (non-control) than to print a control
+ sequence telling the terminal to move forward one character.
+ That kind of control is for people who don't know what the
+ data is underneath the cursor. */
+#ifdef HACK_TERMCAP_MOTION
+ extern char *term_forward_char;
+
+ if (term_forward_char)
+ for (i = last_c_pos; i < new; i++)
+ tputs (term_forward_char, 1, output_character_function);
+ else
+ for (i = last_c_pos; i < new; i++)
+ putc (data[i], out_stream);
+#else
+ for (i = last_c_pos; i < new; i++)
+ putc (data[i], out_stream);
+#endif /* HACK_TERMCAP_MOTION */
+ }
+ else
+ backspace (last_c_pos - new);
+ last_c_pos = new;
+}
+
+/* PWP: move the cursor up or down. */
+move_vert (to)
+ int to;
+{
+ void output_character_function ();
+ register int delta, i;
+
+ if (last_v_pos == to) return;
+
+ if (to > screenheight)
+ return;
+
+ if ((delta = to - last_v_pos) > 0)
+ {
+ for (i = 0; i < delta; i++)
+ putc ('\n', out_stream);
+ tputs (term_cr, 1, output_character_function);
+ last_c_pos = 0; /* because crlf() will do \r\n */
+ }
+ else
+ { /* delta < 0 */
+ if (term_up && *term_up)
+ for (i = 0; i < -delta; i++)
+ tputs (term_up, 1, output_character_function);
+ }
+ last_v_pos = to; /* now to is here */
+}
+
+/* Physically print C on out_stream. This is for functions which know
+ how to optimize the display. */
+rl_show_char (c)
+ int c;
+{
+ if (c > 127)
+ {
+ fprintf (out_stream, "M-");
+ c -= 128;
+ }
+
+#ifdef DISPLAY_TABS
+ if (c < 32 && c != '\t')
+#else
+ if (c < 32)
+#endif
+ {
+
+ c += 64;
+ }
+
+ putc (c, out_stream);
+ fflush (out_stream);
+}
+
+#ifdef DISPLAY_TABS
+int
+rl_character_len (c, pos)
+ register int c, pos;
+{
+ if (c < ' ' || c > 126)
+ {
+ if (c == '\t')
+ return (((pos | (int)7) + 1) - pos);
+ else
+ return (3);
+ }
+ else
+ return (1);
+}
+#else
+int
+rl_character_len (c)
+ int c;
+{
+ if (c < ' ' || c > 126)
+ return (3);
+ else
+ return (1);
+}
+#endif /* DISPLAY_TAB */
+
+/* How to print things in the "echo-area". The prompt is treated as a
+ mini-modeline. */
+rl_message (string, arg1, arg2)
+ char *string;
+{
+ sprintf (msg_buf, string, arg1, arg2);
+ rl_display_prompt = msg_buf;
+ rl_redisplay ();
+}
+
+/* How to clear things from the "echo-area". */
+rl_clear_message ()
+{
+ rl_display_prompt = rl_prompt;
+ rl_redisplay ();
+}
+
+/* **************************************************************** */
+/* */
+/* 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;
+
+char PC;
+char *BC, *UP;
+
+/* 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;
+
+#ifdef HACK_TERMCAP_MOTION
+char *term_forward_char;
+#endif /* HACK_TERMCAP_MOTION */
+
+/* How to go up a line. */
+char *term_up;
+
+/* 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);
+}
+
+init_terminal_io (terminal_name)
+ char *terminal_name;
+{
+ char *term = (terminal_name? terminal_name : (char *)getenv ("TERM"));
+ char *tgetstr (), *buffer;
+
+
+ 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;
+ 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";
+
+#ifdef HACK_TERMCAP_MOTION
+ term_forward_char = tgetstr ("nd", &buffer);
+#endif /* HACK_TERMCAP_MOTION */
+
+ screenwidth = tgetnum ("co");
+ if (screenwidth <= 0)
+ screenwidth = 80;
+ screenwidth--; /* PWP: avoid autowrap bugs */
+
+ screenheight = tgetnum ("li");
+ if (screenheight <= 0)
+ screenheight = 24;
+
+ term_im = tgetstr ("im", &buffer);
+ term_ei = tgetstr ("ei", &buffer);
+ term_IC = tgetstr ("IC", &buffer);
+ term_ic = tgetstr ("ic", &buffer);
+ term_ip = tgetstr ("ip", &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." */
+#ifdef notdef
+ /* XXX Circumvent broken code. */
+ terminal_can_insert = (term_IC || term_im || term_ic || term_ip);
+#endif
+
+ term_up = tgetstr ("up", &buffer);
+ term_dc = tgetstr ("dc", &buffer);
+ term_DC = tgetstr ("DC", &buffer);
+}
+
+/* A function for the use of tputs () */
+static void
+output_character_function (c)
+ int c;
+{
+ putc (c, out_stream);
+}
+
+/* Write COUNT characters from STRING to the output stream. */
+static void
+output_some_chars (string, count)
+ char *string;
+ int count;
+{
+ fwrite (string, 1, count, out_stream);
+}
+
+
+/* Delete COUNT characters from the display line. */
+static
+delete_chars (count)
+ int count;
+{
+ if (count > screenwidth)
+ return;
+
+ if (term_DC && *term_DC)
+ {
+ char *tgoto (), *buffer;
+ buffer = tgoto (term_DC, 0, count);
+ tputs (buffer, 1, output_character_function);
+ }
+ else
+ {
+ if (term_dc && *term_dc)
+ while (count--)
+ tputs (term_dc, 1, output_character_function);
+ }
+}
+
+/* Prepare to insert by inserting COUNT blank spaces. */
+static
+start_insert (count)
+ int count;
+{
+ if (term_im && *term_im)
+ tputs (term_im, 1, output_character_function);
+
+ if (term_IC && *term_IC &&
+ (count > 1 || !term_ic || !*term_ic))
+ {
+ char *tgoto (), *buffer;
+ buffer = tgoto (term_IC, 0, count);
+ tputs (buffer, 1, output_character_function);
+ }
+ else
+ {
+ if (term_ic && *term_ic)
+ while (count--)
+ tputs (term_ic, 1, output_character_function);
+ }
+}
+
+/* We are finished doing our insertion. Send ending string. */
+static
+end_insert ()
+{
+ if (term_ei && *term_ei)
+ tputs (term_ei, 1, output_character_function);
+}
+
+/* Move the cursor back. */
+backspace (count)
+ int count;
+{
+ register int i;
+
+ if (term_backspace)
+ for (i = 0; i < count; i++)
+ tputs (term_backspace, 1, output_character_function);
+ else
+ for (i = 0; i < count; i++)
+ putc ('\b', out_stream);
+}
+
+/* Move to the start of the next line. */
+crlf ()
+{
+ tputs (term_cr, 1, output_character_function);
+ putc ('\n', out_stream);
+}
+
+/* Clear to the end of the line. COUNT is the minimum
+ number of character spaces to clear, */
+clear_to_eol (count)
+ int count;
+{
+ if (term_clreol) {
+ tputs (term_clreol, 1, output_character_function);
+ } else {
+ register int i;
+ /* Do one more character space. */
+ count++;
+ for (i = 0; i < count; i++)
+ putc (' ', out_stream);
+ backspace (count);
+ }
+}
+
+
+/* **************************************************************** */
+/* */
+/* Saving and Restoring the TTY */
+/* */
+/* **************************************************************** */
+
+#ifdef NEW_TTY_DRIVER
+
+/* Standard flags, including ECHO. */
+static int original_tty_flags = 0;
+
+/* Local mode flags, like LPASS8. */
+static int local_mode_flags = 0;
+
+/* Terminal characters. This has C-s and C-q in it. */
+static struct tchars original_tchars;
+
+/* Local special characters. This has the interrupt characters in it. */
+static struct ltchars original_ltchars;
+
+/* We use this to get and set the tty_flags. */
+static struct sgttyb the_ttybuff;
+
+/* Put the terminal in CBREAK mode so that we can detect key presses. */
+static
+rl_prep_terminal ()
+{
+ int tty = fileno (rl_instream);
+
+ /* We always get the latest tty values. Maybe stty changed them. */
+
+ ioctl (tty, TIOCGETP, &the_ttybuff);
+ original_tty_flags = the_ttybuff.sg_flags;
+
+ readline_echoing_p = (original_tty_flags & ECHO);
+
+ /* If this terminal doesn't care how the 8th bit is used,
+ then we can use it for the meta-key.
+ We check by seeing if BOTH odd and even parity are allowed. */
+ if ((the_ttybuff.sg_flags & (ODDP | EVENP)) == (ODDP | EVENP))
+ {
+#ifdef PASS8
+ the_ttybuff.sg_flags |= PASS8;
+#endif
+
+#if defined (TIOCLGET) && defined (LPASS8)
+ {
+ int flags;
+ ioctl (tty, TIOCLGET, &flags);
+ local_mode_flags = flags;
+ flags |= LPASS8;
+ ioctl (tty, TIOCLSET, &flags);
+ }
+#endif
+ }
+
+#ifdef TIOCGETC
+ {
+ struct tchars temp;
+
+ ioctl (tty, TIOCGETC, &original_tchars);
+ bcopy (&original_tchars, &temp, sizeof (struct tchars));
+
+ /* Get rid of C-s and C-q.
+ We remember the value of startc (C-q) so that if the terminal is in
+ xoff state, the user can xon it by pressing that character. */
+ xon_char = temp.t_startc;
+ temp.t_stopc = -1;
+ temp.t_startc = -1;
+
+ /* If there is an XON character, bind it to restart the output. */
+ if (xon_char != -1)
+ rl_bind_key (xon_char, rl_restart_output);
+
+ /* If there is an EOF char, bind eof_char to it. */
+ if (temp.t_eofc != -1)
+ eof_char = temp.t_eofc;
+
+#ifdef NEVER
+ /* Get rid of C-\ and C-c. */
+ temp.t_intrc = temp.t_quitc = -1;
+#endif
+
+ ioctl (tty, TIOCSETC, &temp);
+ }
+#endif /* TIOCGETC */
+
+#ifdef TIOCGLTC
+ {
+ struct ltchars temp;
+
+ ioctl (tty, TIOCGLTC, &original_ltchars);
+ bcopy (&original_ltchars, &temp, sizeof (struct ltchars));
+
+ /* Make the interrupt keys go away. Just enough to make people happy. */
+ temp.t_dsuspc = -1; /* C-y */
+ temp.t_lnextc = -1; /* C-v */
+
+ ioctl (tty, TIOCSLTC, &temp);
+ }
+#endif /* TIOCGLTC */
+
+ the_ttybuff.sg_flags &= ~ECHO;
+ the_ttybuff.sg_flags |= CBREAK;
+ ioctl (tty, TIOCSETN, &the_ttybuff);
+}
+
+/* Restore the terminal to its original state. */
+static
+rl_deprep_terminal ()
+{
+ int tty = fileno (rl_instream);
+
+#if defined (TIOCLGET) && defined (LPASS8)
+ if ((the_ttybuff.sg_flags & (ODDP | EVENP)) == (ODDP | EVENP))
+ ioctl (tty, TIOCLSET, &local_mode_flags);
+#endif
+
+#ifdef TIOCSLTC
+ ioctl (tty, TIOCSLTC, &original_ltchars);
+#endif
+
+#ifdef TIOCSETC
+ ioctl (tty, TIOCSETC, &original_tchars);
+#endif
+
+ the_ttybuff.sg_flags = original_tty_flags;
+ ioctl (tty, TIOCSETN, &the_ttybuff);
+ readline_echoing_p = 1;
+}
+
+#else /* !defined (NEW_TTY_DRIVER) */
+static struct termio otio;
+
+static
+rl_prep_terminal ()
+{
+ int tty = fileno (rl_instream);
+ struct termio tio;
+
+ ioctl (tty, TCGETA, &tio);
+ ioctl (tty, TCGETA, &otio);
+
+ readline_echoing_p = (tio.c_lflag & ECHO);
+
+ tio.c_lflag &= ~(ICANON|ECHO);
+ tio.c_iflag &= ~(IXON|ISTRIP|INPCK);
+
+#ifndef HANDLE_SIGNALS
+ tio.c_lflag &= ~ISIG;
+#endif
+
+ tio.c_cc[VEOF] = 1; /* really: MIN */
+ tio.c_cc[VEOL] = 0; /* really: TIME */
+ ioctl (tty, TCSETAW,&tio);
+}
+
+static
+rl_deprep_terminal ()
+{
+ int tty = fileno (rl_instream);
+ ioctl (tty, TCSETAW, &otio);
+}
+#endif /* NEW_TTY_DRIVER */
+
+
+/* **************************************************************** */
+/* */
+/* 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 ((int)rindex (pathname_alphabetic_chars, c));
+ 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)
+ {
+ 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 ();
+
+ longjmp (readline_top_level, 1);
+}
+
+/* Return a copy of the string between FROM and TO.
+ FROM is inclusive, TO is not. */
+char *
+rl_copy (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);
+}
+
+
+/* **************************************************************** */
+/* */
+/* 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;
+{
+ extern int doing_an_undo;
+ register int i, l = strlen (string);
+ while (rl_end + l >= rl_line_buffer_len)
+ {
+ rl_line_buffer =
+ (char *)xrealloc (rl_line_buffer,
+ rl_line_buffer_len += DEFAULT_BUFFER_SIZE);
+ the_line = rl_line_buffer;
+ }
+
+ 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;
+{
+ extern int doing_an_undo;
+ register char *text;
+
+ /* Fix it if the caller is confused. */
+ if (from > to) {
+ int t = from;
+ from = to;
+ to = t;
+ }
+ text = rl_copy (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)
+ {
+#ifdef VI_MODE
+ if (rl_point == (rl_end - (rl_editing_mode == vi_mode)))
+#else
+ if (rl_point == rl_end)
+#endif
+ {
+ ding ();
+ return;
+ }
+ else
+ rl_point++;
+ --count;
+ }
+}
+
+/* Move backward COUNT characters. */
+rl_backward (count)
+ int count;
+{
+ if (count < 0)
+ rl_forward (-count);
+ else
+ while (count)
+ {
+ if (!rl_point)
+ {
+ ding ();
+ return;
+ }
+ else
+ --rl_point;
+ --count;
+ }
+}
+
+/* Move to the beginning of the line. */
+rl_beg_of_line ()
+{
+ rl_point = 0;
+}
+
+/* Move to the end of the line. */
+rl_end_of_line ()
+{
+ rl_point = rl_end;
+}
+
+/* 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;
+ }
+
+ while (count)
+ {
+ if (rl_point == rl_end)
+ return;
+
+ /* 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;
+ }
+}
+
+/* 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;
+ }
+
+ while (count)
+ {
+ if (!rl_point)
+ return;
+
+ /* 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;
+ }
+}
+
+/* Clear the current line. Numeric argument to C-l does this. */
+rl_refresh_line ()
+{
+ int curr_line = last_c_pos / screenwidth;
+
+ move_vert(curr_line);
+ move_cursor_relative (0, the_line); /* XXX is this right */
+ rl_forced_update_display ();
+ rl_display_fixed = 1;
+}
+
+/* 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 ()
+{
+ extern char *term_clrpag;
+ static void output_character_function ();
+
+ if (rl_explicit_arg)
+ {
+ rl_refresh_line ();
+ return;
+ }
+
+ if (term_clrpag)
+ tputs (term_clrpag, 1, output_character_function);
+ else
+ crlf ();
+
+ rl_forced_update_display ();
+ rl_display_fixed = 1;
+}
+
+
+/* **************************************************************** */
+/* */
+/* 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;
+
+ /* 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;
+ }
+
+ if (count > 1024)
+ {
+ int descreaser;
+
+ string = (char *)alloca (1024 + 1);
+
+ for (i = 0; i < 1024; i++)
+ string[i] = c;
+
+ while (count)
+ {
+ descreaser = (count > 1024 ? 1024 : count);
+ string[descreaser] = '\0';
+ rl_insert_text (string);
+ count -= descreaser;
+ }
+ return;
+ }
+
+ /* 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 slen, key = 0, t;
+
+ i = 0;
+ string = (char *)alloca (ibuffer_len + 1);
+ string[i++] = c;
+
+ while ((key = rl_get_char()) != -2 &&
+ (keymap[key].type == ISFUNC &&
+ keymap[key].function == rl_insert))
+ string[i++] = key;
+
+ if (key != -2)
+ rl_unget_char (key);
+
+ string[i] = '\0';
+ rl_insert_text (string);
+ return;
+ }
+ else
+ {
+ /* Inserting a single character. */
+ string = (char *)alloca (2);
+
+ string[1] = '\0';
+ string[0] = c;
+ rl_insert_text (string);
+ }
+}
+
+/* Insert the next typed character verbatim. */
+rl_quoted_insert (count)
+ int count;
+{
+ int c = rl_read_key (in_stream);
+ rl_insert (count, c);
+}
+
+/* Insert a tab character. */
+rl_tab_insert (count)
+ int count;
+{
+ rl_insert (count, '\t');
+}
+
+#ifdef VI_MODE
+/* Non-zero means enter insertion mode. */
+static vi_doing_insert = 0;
+#endif
+
+/* 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;
+
+#ifdef VI_MODE
+ {
+ if (vi_doing_insert)
+ {
+ rl_end_undo_group ();
+ vi_doing_insert = 0;
+ }
+ }
+#endif /* VI_MODE */
+
+ if (readline_echoing_p)
+ {
+ move_vert (vis_botlin);
+ vis_botlin = 0;
+ crlf ();
+ fflush (out_stream);
+ rl_display_fixed++;
+ }
+}
+
+rl_clean_up_for_exit ()
+{
+ if (readline_echoing_p)
+ {
+ move_vert (vis_botlin);
+ vis_botlin = 0;
+ fflush (out_stream);
+ rl_restart_output ();
+ }
+}
+
+/* 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;
+{
+}
+
+/* Rubout the character behind point. */
+rl_rubout (count)
+ int count;
+{
+ if (count < 0)
+ {
+ rl_delete (-count);
+ return;
+ }
+
+ if (!rl_point)
+ {
+ ding ();
+ return;
+ }
+
+ if (count > 1)
+ {
+ 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 && alphabetic (c) && last_c_pos)
+ {
+ backspace (1);
+ putc (' ', out_stream);
+ backspace (1);
+ last_c_pos--;
+ rl_display_fixed++;
+ }
+ }
+}
+
+/* Delete the character under the cursor. Given a numeric argument,
+ kill that many characters instead. */
+rl_delete (count, invoking_key)
+ int count;
+{
+ if (count < 0)
+ {
+ rl_rubout (-count);
+ return;
+ }
+
+ if (rl_point == rl_end)
+ {
+ ding ();
+ return;
+ }
+
+#ifdef VI_MODE
+ if ((count > 1) || ((count == 1) && (rl_editing_mode == vi_mode)))
+#else
+ if (count > 1)
+#endif
+ {
+ int orig_point = rl_point;
+ while (count && (rl_point < rl_end))
+ {
+ rl_point++;
+ count--;
+ }
+ rl_kill_text (orig_point, rl_point);
+ rl_point = orig_point;
+ }
+ else
+ rl_delete_text (rl_point, rl_point + 1);
+}
+
+
+/* **************************************************************** */
+/* */
+/* 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);
+ }
+}
+
+/* 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;
+ }
+}
+
+
+
+/* **************************************************************** */
+/* */
+/* 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
+
+/* Uppercase the word at point. */
+rl_upcase_word (count)
+ int count;
+{
+ rl_change_case (count, UpCase);
+}
+
+/* Lowercase the word at point. */
+rl_downcase_word (count)
+ int count;
+{
+ rl_change_case (count, DownCase);
+}
+
+/* Upcase the first letter, downcase the rest. */
+rl_capitalize_word (count)
+ int count;
+{
+ 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. */
+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 ();
+ }
+ }
+ rl_point = end;
+}
+
+/* **************************************************************** */
+/* */
+/* 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;
+
+ /* 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;
+ }
+
+ /* Get the text of the words. */
+ word1 = rl_copy (w1_beg, w1_end);
+ word2 = rl_copy (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);
+}
+
+/* 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;
+{
+ if (!count)
+ return;
+
+ if (!rl_point || rl_end < 2) {
+ ding ();
+ return;
+ }
+
+ while (count) {
+ if (rl_point == rl_end) {
+ int t = the_line[rl_point - 1];
+ the_line[rl_point - 1] = the_line[rl_point - 2];
+ the_line[rl_point - 2] = t;
+ } else {
+ int t = the_line[rl_point];
+ the_line[rl_point] = the_line[rl_point - 1];
+ the_line[rl_point - 1] = t;
+ if (count < 0 && rl_point)
+ rl_point--;
+ else
+ rl_point++;
+ }
+ if (count < 0)
+ count++;
+ else
+ count--;
+ }
+}
+
+
+/* **************************************************************** */
+/* */
+/* Bogus Flow Control */
+/* */
+/* **************************************************************** */
+
+rl_restart_output (count, key)
+ int count, key;
+{
+ int fildes = fileno (stdin);
+#ifdef TIOCSTART
+ ioctl (fildes, TIOCSTART, 0);
+#endif /* TIOCSTART */
+}
+
+/* **************************************************************** */
+/* */
+/* Completion matching, from readline's point of view. */
+/* */
+/* **************************************************************** */
+
+/* Pointer to the generator function for completion_matches ().
+ NULL means to use filename_entry_function (), the default filename
+ completer. */
+Function *rl_completion_entry_function = (Function *)NULL;
+
+/* Pointer to alternative function to create matches.
+ Function is called with TEXT, START, and END.
+ START and END are indices in RL_LINE_BUFFER saying what the boundaries
+ of TEXT are.
+ If this function exists and returns NULL then call the value of
+ rl_completion_entry_function to try to match, otherwise use the
+ array of strings returned. */
+Function *rl_attempted_completion_function = (Function *)NULL;
+
+/* Complete the word at or before point. You have supplied the function
+ that does the initial simple matching selection algorithm (see
+ completion_matches ()). The default is to do filename completion. */
+rl_complete (ignore, invoking_key)
+ int ignore, invoking_key;
+{
+ rl_complete_internal (TAB);
+ if (running_in_emacs)
+ printf ("%s", the_line);
+}
+
+/* List the possible completions. See description of rl_complete (). */
+rl_possible_completions ()
+{
+ rl_complete_internal ('?');
+}
+
+/* The user must press "y" or "n". Non-zero return means "y" pressed. */
+get_y_or_n ()
+{
+ int c;
+ loop:
+ c = rl_read_key (in_stream);
+ if (c == 'y' || c == 'Y') return (1);
+ if (c == 'n' || c == 'N') return (0);
+ if (c == ABORT_CHAR) rl_abort ();
+ ding (); goto loop;
+}
+
+/* Up to this many items will be displayed in response to a
+ possible-completions call. After that, we ask the user if
+ she is sure she wants to see them all. */
+int rl_completion_query_items = 100;
+
+/* The basic list of characters that signal a break between words for the
+ completer routine. The contents of this variable is what breaks words
+ in the shell, i.e. " \t\n\"\\'`@$><=" */
+char *rl_basic_word_break_characters = " \t\n\"\\'`@$><=";
+
+/* The list of characters that signal a break between words for
+ rl_complete_internal. The default list is the contents of
+ rl_basic_word_break_characters. */
+char *rl_completer_word_break_characters = (char *)NULL;
+
+/* List of characters that are word break characters, but should be left
+ in TEXT when it is passed to the completion function. The shell uses
+ this to help determine what kind of completing to do. */
+char *rl_special_prefixes = (char *)NULL;
+
+/* If non-zero, then disallow duplicates in the matches. */
+int rl_ignore_completion_duplicates = 1;
+
+/* Non-zero means that the results of the matches are to be treated
+ as filenames. This is ALWAYS zero on entry, and can only be changed
+ within a completion entry finder function. */
+int rl_filename_completion_desired = 0;
+
+/* Complete the word at or before point.
+ WHAT_TO_DO says what to do with the completion.
+ `?' means list the possible completions.
+ TAB means do standard completion.
+ `*' means insert all of the possible completions. */
+rl_complete_internal (what_to_do)
+ int what_to_do;
+{
+ char *filename_completion_function ();
+ char **completion_matches (), **matches;
+ Function *our_func;
+ int start, end, delimiter = 0;
+ char *text;
+
+ if (rl_completion_entry_function)
+ our_func = rl_completion_entry_function;
+ else
+ our_func = (int (*)())filename_completion_function;
+
+ /* Only the completion entry function can change this. */
+ rl_filename_completion_desired = 0;
+
+ /* We now look backwards for the start of a filename/variable word. */
+ end = rl_point;
+ if (rl_point)
+ {
+ while (--rl_point &&
+ !rindex (rl_completer_word_break_characters, the_line[rl_point]));
+
+ /* If we are at a word break, then advance past it. */
+ if (rindex (rl_completer_word_break_characters, (the_line[rl_point])))
+ {
+ /* If the character that caused the word break was a quoting
+ character, then remember it as the delimiter. */
+ if (rindex ("\"'", the_line[rl_point]) && (end - rl_point) > 1)
+ delimiter = the_line[rl_point];
+
+ /* If the character isn't needed to determine something special
+ about what kind of completion to perform, then advance past it. */
+
+ if (!rl_special_prefixes ||
+ !rindex (rl_special_prefixes, the_line[rl_point]))
+ rl_point++;
+ }
+ }
+
+ start = rl_point;
+ rl_point = end;
+ text = rl_copy (start, end);
+
+ /* If the user wants to TRY to complete, but then wants to give
+ up and use the default completion function, they set the
+ variable rl_attempted_completion_function. */
+ if (rl_attempted_completion_function)
+ {
+ matches =
+ (char **)(*rl_attempted_completion_function) (text, start, end);
+
+ if (matches)
+ goto after_usual_completion;
+ }
+
+ matches = completion_matches (text, our_func, start, end);
+
+ after_usual_completion:
+ free (text);
+
+ if (!matches)
+ ding ();
+ else
+ {
+ register int i;
+
+ some_matches:
+
+ /* It seems to me that in all the cases we handle we would like
+ to ignore duplicate possiblilities. Scan for the text to
+ insert being identical to the other completions. */
+ if (rl_ignore_completion_duplicates)
+ {
+ char *lowest_common;
+ int j, newlen = 0;
+
+ /* Sort the items. */
+ /* It is safe to sort this array, because the lowest common
+ denominator found in matches[0] will remain in place. */
+ for (i = 0; matches[i]; i++);
+ qsort (matches, i, sizeof (char *), compare_strings);
+
+ /* Remember the lowest common denimator for it may be unique. */
+ lowest_common = savestring (matches[0]);
+
+ for (i = 0; matches[i + 1]; i++)
+ {
+ if (strcmp (matches[i], matches[i + 1]) == 0)
+ {
+ free (matches[i]);
+ matches[i] = (char *)-1;
+ }
+ else
+ newlen++;
+ }
+
+ /* We have marked all the dead slots with (char *)-1.
+ Copy all the non-dead entries into a new array. */
+ {
+ char **temp_array =
+ (char **)malloc ((3 + newlen) * sizeof (char *));
+
+ for (i = 1, j = 1; matches[i]; i++)
+ if (matches[i] != (char *)-1)
+ temp_array[j++] = matches[i];
+ temp_array[j] = (char *)NULL;
+
+ if (matches[0] != (char *)-1)
+ free (matches[0]);
+ free (matches);
+
+ matches = temp_array;
+ }
+
+ /* Place the lowest common denominator back in [0]. */
+ matches[0] = lowest_common;
+
+ /* If there is one string left, and it is identical to the
+ lowest common denominator, then the LCD is the string to
+ insert. */
+ if (j == 2 && strcmp (matches[0], matches[1]) == 0)
+ {
+ free (matches[1]);
+ matches[1] = (char *)NULL;
+ }
+ }
+
+ switch (what_to_do)
+ {
+ case TAB:
+ rl_delete_text (start, rl_point);
+ rl_point = start;
+ rl_insert_text (matches[0]);
+
+ /* If there are more matches, ring the bell to indicate.
+ If this was the only match, and we are hacking files,
+ check the file to see if it was a directory. If so,
+ add a '/' to the name. If not, and we are at the end
+ of the line, then add a space. */
+ if (matches[1])
+ {
+ ding (); /* There are other matches remaining. */
+ }
+ else
+ {
+ char temp_string[2];
+
+ temp_string[0] = delimiter ? delimiter : ' ';
+ temp_string[1] = '\0';
+
+ if (rl_filename_completion_desired)
+ {
+ struct stat finfo;
+ char *tilde_expand ();
+ char *filename = tilde_expand (matches[0]);
+
+ if ((stat (filename, &finfo) == 0) &&
+ ((finfo.st_mode & S_IFMT) == S_IFDIR))
+ {
+ if (the_line[rl_point] != '/')
+ rl_insert_text ("/");
+ }
+ else
+ {
+ if (rl_point == rl_end)
+ rl_insert_text (temp_string);
+ }
+ free (filename);
+ }
+ else
+ {
+ if (rl_point == rl_end)
+ rl_insert_text (temp_string);
+ }
+ }
+ break;
+
+ case '*':
+ {
+ int i = 1;
+
+ rl_delete_text (start, rl_point);
+ rl_point = start;
+ rl_begin_undo_group ();
+ if (matches[1])
+ {
+ while (matches[i])
+ {
+ rl_insert_text (matches[i++]);
+ rl_insert_text (" ");
+ }
+ }
+ else
+ {
+ rl_insert_text (matches[0]);
+ rl_insert_text (" ");
+ }
+ rl_end_undo_group ();
+ }
+ break;
+
+
+ case '?':
+ {
+ int len, count, limit, max = 0;
+ int j, k, l;
+
+ /* Handle simple case first. What if there is only one answer? */
+ if (!matches[1])
+ {
+ char *temp;
+
+ if (rl_filename_completion_desired)
+ temp = rindex (matches[0], '/');
+ else
+ temp = (char *)NULL;
+
+ if (!temp)
+ temp = matches[0];
+ else
+ temp++;
+
+ crlf ();
+ fprintf (out_stream, "%s", temp);
+ crlf ();
+ goto restart;
+ }
+
+ /* There is more than one answer. Find out how many there are,
+ and find out what the maximum printed length of a single entry
+ is. */
+ for (i = 1; matches[i]; i++)
+ {
+ char *temp = (char *)NULL;
+
+ /* If we are hacking filenames, then only count the characters
+ after the last slash in the pathname. */
+ if (rl_filename_completion_desired)
+ temp = rindex (matches[i], '/');
+ else
+ temp = (char *)NULL;
+
+ if (!temp)
+ temp = matches[i];
+ else
+ temp++;
+
+ if (strlen (temp) > max)
+ max = strlen (temp);
+ }
+
+ len = i;
+
+ /* If there are many items, then ask the user if she
+ really wants to see them all. */
+ if (len >= rl_completion_query_items)
+ {
+ crlf ();
+ fprintf (out_stream,
+ "There are %d possibilities. Do you really", len);
+ crlf ();
+ fprintf (out_stream, "wish to see them all? (y or n)");
+ fflush (out_stream);
+ if (!get_y_or_n ())
+ {
+ crlf ();
+ goto restart;
+ }
+ }
+ /* How many items of MAX length can we fit in the screen window? */
+ max += 2;
+ limit = screenwidth / max;
+ if (limit != 1 && (limit * max == screenwidth))
+ limit--;
+
+ /* How many iterations of the printing loop? */
+ count = (len + (limit - 1)) / limit;
+
+ /* Watch out for special case. If LEN is less than LIMIT, then
+ just do the inner printing loop. */
+ if (len < limit) count = 1;
+
+ /* Sort the items if they are not already sorted. */
+ if (!rl_ignore_completion_duplicates)
+ {
+ qsort (matches, len, sizeof (char *), compare_strings);
+ }
+
+ /* Print the sorted items, up-and-down alphabetically, like
+ ls might. */
+ crlf ();
+
+ for (i = 1; i < count + 1; i++)
+ {
+ for (j = 0, l = i; j < limit; j++)
+ {
+ if (l > len || !matches[l])
+ {
+ break;
+ }
+ else
+ {
+ char *temp = (char *)NULL;
+
+ if (rl_filename_completion_desired)
+ temp = rindex (matches[l], '/');
+ else
+ temp = (char *)NULL;
+
+ if (!temp)
+ temp = matches[l];
+ else
+ temp++;
+
+ fprintf (out_stream, "%s", temp);
+ for (k = 0; k < max - strlen (temp); k++)
+ putc (' ', out_stream);
+ }
+ l += count;
+ }
+ crlf ();
+ }
+ restart:
+
+ rl_on_new_line ();
+ }
+ break;
+
+ default:
+ abort ();
+ }
+
+ for (i = 0; matches[i]; i++)
+ free (matches[i]);
+ free (matches);
+ }
+}
+
+/* A completion function for usernames.
+ TEXT contains a partial username preceded by a random
+ character (usually `~'). */
+char *
+username_completion_function (text, state)
+ int state;
+ char *text;
+{
+ static char *username = (char *)NULL;
+ static struct passwd *entry;
+ static int namelen;
+
+ if (!state)
+ {
+ if (username)
+ free (username);
+ username = savestring (&text[1]);
+ namelen = strlen (username);
+ setpwent ();
+ }
+
+ while (entry = getpwent ())
+ {
+ if (strncmp (username, entry->pw_name, namelen) == 0)
+ break;
+ }
+
+ if (!entry)
+ {
+ endpwent ();
+ return ((char *)NULL);
+ }
+ else
+ {
+ char *value = (char *)xmalloc (2 + strlen (entry->pw_name));
+ *value = *text;
+ strcpy (value + 1, entry->pw_name);
+ rl_filename_completion_desired = 1;
+ return (value);
+ }
+}
+
+/* If non-null, this contains the address of a function to call if the
+ standard meaning for expanding a tilde fails. The function is called
+ with the text (sans tilde, as in "foo"), and returns a malloc()'ed string
+ which is the expansion, or a NULL pointer if there is no expansion. */
+Function *rl_tilde_expander = (Function *)NULL;
+
+/* Expand FILENAME if it begins with a tilde. This always returns
+ a new string. */
+char *
+tilde_expand (filename)
+ char *filename;
+{
+ char *dirname = filename ? savestring (filename) : (char *)NULL;
+
+ if (dirname && *dirname == '~')
+ {
+ char *temp_name;
+ if (!dirname[1] || dirname[1] == '/')
+ {
+ /* Prepend $HOME to the rest of the string. */
+ char *temp_home = (char *)getenv ("HOME");
+
+ temp_name = (char *)alloca (1 + strlen (&dirname[1])
+ + (temp_home? strlen (temp_home) : 0));
+ temp_name[0] = '\0';
+ if (temp_home)
+ strcpy (temp_name, temp_home);
+ strcat (temp_name, &dirname[1]);
+ free (dirname);
+ dirname = savestring (temp_name);
+ }
+ else
+ {
+ struct passwd *getpwnam (), *user_entry;
+ char *username = (char *)alloca (257);
+ int i, c;
+
+ for (i = 1; c = dirname[i]; i++)
+ {
+ if (c == '/') break;
+ else username[i - 1] = c;
+ }
+ username[i - 1] = '\0';
+
+ if (!(user_entry = getpwnam (username)))
+ {
+ /* If the calling program has a special syntax for
+ expanding tildes, and we couldn't find a standard
+ expansion, then let them try. */
+ if (rl_tilde_expander)
+ {
+ char *expansion;
+
+ expansion = (char *)(*rl_tilde_expander) (username);
+
+ if (expansion)
+ {
+ temp_name = (char *)alloca (1 + strlen (expansion)
+ + strlen (&dirname[i]));
+ strcpy (temp_name, expansion);
+ strcat (temp_name, &dirname[i]);
+ free (expansion);
+ goto return_name;
+ }
+ }
+ /*
+ * We shouldn't report errors.
+ */
+ }
+ else
+ {
+ temp_name = (char *)alloca (1 + strlen (user_entry->pw_dir)
+ + strlen (&dirname[i]));
+ strcpy (temp_name, user_entry->pw_dir);
+ strcat (temp_name, &dirname[i]);
+ return_name:
+ free (dirname);
+ dirname = savestring (temp_name);
+ }
+ }
+ }
+ return (dirname);
+}
+
+
+/* **************************************************************** */
+/* */
+/* Undo, and Undoing */
+/* */
+/* **************************************************************** */
+
+/* Non-zero tells rl_delete_text and rl_insert_text to not add to
+ the undo list. */
+int doing_an_undo = 0;
+
+/* 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. */
+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. */
+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);
+ }
+}
+
+/* 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
+ abort ();
+ 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);
+}
+
+/* End an undo group started with rl_begin_undo_group (). */
+rl_end_undo_group ()
+{
+ rl_add_undo (UNDO_END, 0, 0, 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 (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 ();
+ }
+}
+
+/* Revert the current line to its previous state. */
+rl_revert_line ()
+{
+ if (!rl_undo_list) ding ();
+ else {
+ while (rl_undo_list)
+ rl_do_undo ();
+ }
+}
+
+/* Do some undoing of things that were done. */
+rl_undo_command (count)
+{
+ if (count < 0) return; /* Nothing to do. */
+
+ while (count)
+ {
+ if (rl_do_undo ())
+ {
+ count--;
+ }
+ else
+ {
+ ding ();
+ break;
+ }
+ }
+}
+
+/* **************************************************************** */
+/* */
+/* 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;
+}
+
+/* Free the contents (and containing structure) of a HIST_ENTRY. */
+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);
+ }
+}
+
+/* Put back the saved_line_for_history if there is one. */
+maybe_unsave_line ()
+{
+ if (saved_line_for_history) {
+ 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 ();
+ }
+}
+
+/* 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;
+ }
+}
+
+
+
+/* **************************************************************** */
+/* */
+/* History Commands */
+/* */
+/* **************************************************************** */
+
+/* Meta-< goes to the start of the history. */
+rl_beginning_of_history ()
+{
+ 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 ();
+}
+
+/* Move down to the next history line. */
+rl_get_next_history (count)
+ int count;
+{
+ HIST_ENTRY *temp = (HIST_ENTRY *)NULL;
+
+ if (count < 0)
+ {
+ rl_get_previous_history (-count);
+ return;
+ }
+
+ if (!count)
+ return;
+
+ maybe_replace_line ();
+
+ while (count)
+ {
+ temp = next_history ();
+ if (!temp)
+ break;
+ --count;
+ }
+
+ if (!temp)
+ maybe_unsave_line ();
+ else
+ {
+ strcpy (the_line, temp->line);
+ rl_undo_list = (UNDO_LIST *)temp->data;
+ rl_end = rl_point = strlen (the_line);
+ }
+}
+
+/* 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)
+ {
+ rl_get_next_history (-count);
+ return;
+ }
+
+ if (!count)
+ return;
+
+ /* 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
+ {
+ strcpy (the_line, temp->line);
+ rl_undo_list = (UNDO_LIST *)temp->data;
+ rl_end = rl_point = strlen (the_line);
+#ifdef VI_MODE
+ if (rl_editing_mode == vi_mode)
+ rl_point = 0;
+#endif /* VI_MODE */
+ }
+}
+
+/* There is a command in ksh which yanks into this line, the last word
+ of the previous line. Here it is. We left it on M-. */
+rl_yank_previous_last_arg (ignore)
+ int ignore;
+{
+}
+
+
+
+/* **************************************************************** */
+/* */
+/* I-Search and Searching */
+/* */
+/* **************************************************************** */
+
+/* Search backwards through the history looking for a string which is typed
+ interactively. Start with the current line. */
+rl_reverse_search_history (sign, key)
+ int sign;
+ int key;
+{
+ rl_search_history (-sign, key);
+}
+
+/* Search forwards through the history looking for a string which is typed
+ interactively. Start with the current line. */
+rl_forward_search_history (sign, key)
+ int sign;
+ int key;
+{
+ rl_search_history (sign, key);
+}
+
+/* Display the current state of the search in the echo-area.
+ SEARCH_STRING contains the string that is being searched for,
+ DIRECTION is zero for forward, or 1 for reverse,
+ WHERE is the history list number of the current line. If it is
+ -1, then this line is the starting one. */
+rl_display_search (search_string, reverse_p, where)
+ char *search_string;
+ int reverse_p, where;
+{
+ char *message = (char *)NULL;
+
+ message =
+ (char *)alloca (1 + (search_string ? strlen (search_string) : 0) + 30);
+
+ *message = '\0';
+
+#ifdef NEVER
+ if (where != -1)
+ sprintf (message, "[%d]", where + history_base);
+#endif
+
+ strcat (message, "(");
+
+ if (reverse_p)
+ strcat (message, "reverse-");
+
+ strcat (message, "i-search)`");
+
+ if (search_string)
+ strcat (message, search_string);
+
+ strcat (message, "': ");
+ rl_message (message, 0, 0);
+ rl_redisplay ();
+}
+
+/* Search through the history looking for an interactively typed string.
+ This is analogous to i-search. We start the search in the current line.
+ DIRECTION is which direction to search; > 0 means forward, < 0 means
+ backwards. */
+rl_search_history (direction, invoking_key)
+ int direction;
+ int invoking_key;
+{
+ /* The string that the user types in to search for. */
+ char *search_string = (char *)alloca (128);
+
+ /* The current length of SEARCH_STRING. */
+ int search_string_index;
+
+ /* The list of lines to search through. */
+ char **lines;
+
+ /* The length of LINES. */
+ int hlen;
+
+ /* Where we get LINES from. */
+ HIST_ENTRY **hlist = history_list ();
+
+ int orig_point = rl_point;
+ int orig_line = where_history ();
+ int last_found_line = orig_line;
+ int c, done = 0;
+ register int i = 0;
+
+
+ /* The line currently being searched. */
+ char *sline;
+
+ /* Offset in that line. */
+ int index;
+
+ /* Non-zero if we are doing a reverse search. */
+ int reverse = (direction < 0);
+
+ /* Create an arrary of pointers to the lines that we want to search. */
+
+ maybe_replace_line ();
+ if (hlist)
+ for (i = 0; hlist[i]; i++);
+
+ /* Allocate space for this many lines, +1 for the current input line,
+ and remember those lines. */
+ lines = (char **)alloca ((1 + (hlen = i)) * sizeof (char *));
+ for (i = 0; i < hlen; i++)
+ lines[i] = hlist[i]->line;
+
+ if (saved_line_for_history)
+ lines[i] = saved_line_for_history->line;
+ else
+ {
+ /* So I have to type it in this way instead. */
+ lines[i] = (char *)alloca (1 + strlen (the_line));
+ strcpy (lines[i], &the_line[0]);
+ }
+
+ hlen++;
+
+ /* The line where we start the search. */
+ i = orig_line;
+
+ /* Initialize search parameters. */
+ *search_string = '\0';
+ search_string_index = 0;
+
+ rl_display_search (search_string, reverse, -1);
+
+ sline = the_line;
+ index = rl_point;
+
+ while (!done)
+ {
+ c = rl_read_key (in_stream);
+
+ /* Hack C to Do What I Mean. */
+ {
+ Function *f = (Function *)NULL;
+
+ if (keymap[c].type == ISFUNC)
+ f = keymap[c].function;
+
+ if (f == rl_reverse_search_history)
+ c = reverse ? -1 : -2;
+ else if (f == rl_forward_search_history)
+ c = !reverse ? -1 : -2;
+ }
+
+ switch (c)
+ {
+ case ESC:
+ done = 1;
+ continue;
+
+ /* case invoking_key: */
+ case -1:
+ goto search_again;
+
+ /* switch directions */
+ case -2:
+ direction = -direction;
+ reverse = (direction < 0);
+
+ goto do_search;
+
+ case CTRL ('G'):
+ strcpy (the_line, lines[orig_line]);
+ rl_point = orig_point;
+ rl_end = strlen (the_line);
+ rl_clear_message ();
+ return;
+
+ default:
+ if (c < 32 || c > 126)
+ {
+ rl_execute_next (c);
+ done = 1;
+ continue;
+ }
+ else
+ {
+ search_string[search_string_index++] = c;
+ search_string[search_string_index] = '\0';
+ goto do_search;
+
+ search_again:
+
+ if (!search_string_index)
+ continue;
+ else
+ {
+ if (reverse)
+ --index;
+ else
+ if (index != strlen (sline))
+ ++index;
+ else
+ ding ();
+ }
+ do_search:
+
+ while (1)
+ {
+ if (reverse)
+ {
+ while (index >= 0)
+ if (strncmp
+ (search_string,
+ sline + index,
+ search_string_index) == 0)
+ goto string_found;
+ else
+ index--;
+ }
+ else
+ {
+ register int limit =
+ (strlen (sline) - search_string_index) + 1;
+
+ while (index < limit)
+ {
+ if (strncmp (search_string,
+ sline + index,
+ search_string_index) == 0)
+ goto string_found;
+ index++;
+ }
+ }
+
+ next_line:
+ i += direction;
+
+ /* At limit for direction? */
+ if ((reverse && i < 0) ||
+ (!reverse && i == hlen))
+ goto search_failed;
+
+ sline = lines[i];
+ if (reverse)
+ index = strlen (sline);
+ else
+ index = 0;
+
+ /* If the search string is longer than the current
+ line, no match. */
+ if (search_string_index > strlen (sline))
+ goto next_line;
+
+ /* Start actually searching. */
+ if (reverse)
+ index -= search_string_index;
+ }
+
+ search_failed:
+ /* We cannot find the search string. Ding the bell. */
+ ding ();
+ i = last_found_line;
+ break;
+
+ string_found:
+ /* We have found the search string. Just display it. But don't
+ actually move there in the history list until the user accepts
+ the location. */
+ strcpy (the_line, lines[i]);
+ rl_point = index;
+ rl_end = strlen (the_line);
+ last_found_line = i;
+ rl_display_search (search_string, reverse,
+ (i == orig_line) ? -1 : i);
+ }
+ }
+ continue;
+ }
+ /* The user has won. They found the string that they wanted. Now all
+ we have to do is place them there. */
+ {
+ int now = last_found_line;
+
+ /* First put back the original state. */
+ strcpy (the_line, lines[orig_line]);
+
+ if (now < orig_line)
+ rl_get_previous_history (orig_line - now);
+ else
+ rl_get_next_history (now - orig_line);
+
+ rl_point = index;
+ rl_clear_message ();
+ }
+}
+
+/* Make C be the next command to be executed. */
+rl_execute_next (c)
+ int c;
+{
+ rl_pending_input = c;
+}
+
+/* **************************************************************** */
+/* */
+/* 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;
+{}
+
+/* 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 (from, to);
+
+ /* Is there anything to kill? */
+ if (from == to) {
+ free (text);
+ last_command_was_kill++;
+ return;
+ }
+
+ /* 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) {
+ 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++;
+}
+
+/* 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)
+ 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;
+ }
+}
+
+/* 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)
+ 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)
+ 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;
+ }
+}
+
+/* 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)
+ rl_kill_line (1);
+ else
+ {
+ if (!rl_point)
+ ding ();
+ else
+ {
+ rl_beg_of_line ();
+ rl_kill_text (orig_point, rl_point);
+ }
+ }
+}
+
+/* Yank back the last killed text. This ignores arguments. */
+rl_yank ()
+{
+ if (!rl_kill_ring) rl_abort ();
+ rl_insert_text (rl_kill_ring[rl_kill_index]);
+}
+
+/* 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 ();
+ }
+
+ 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 ();
+ }
+ else
+ rl_abort ();
+
+}
+
+/* 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;
+ }
+
+ arg = history_arg_extract (count, count, entry->line);
+ if (!arg || !*arg)
+ {
+ ding ();
+ return;
+ }
+
+ rl_begin_undo_group ();
+ if (rl_point && the_line[rl_point - 1] != ' ')
+ rl_insert_text (" ");
+ rl_insert_text (arg);
+ free (arg);
+ rl_end_undo_group ();
+}
+
+/* Vi Mode. */
+#ifdef VI_MODE
+#include "vi_mode.c"
+#endif /* VI_MODE */
+
+/* How to toggle back and forth between editing modes. */
+rl_vi_editing_mode ()
+{
+#ifdef VI_MODE
+ rl_editing_mode = vi_mode;
+ rl_vi_insertion_mode ();
+#endif /* VI_MODE */
+}
+
+rl_emacs_editing_mode ()
+{
+ rl_editing_mode = emacs_mode;
+ keymap = emacs_standard_keymap;
+}
+
+
+/* **************************************************************** */
+/* */
+/* Completion */
+/* */
+/* **************************************************************** */
+
+/* Non-zero means that case is not significant in completion. */
+int completion_case_fold = 0;
+
+/* Return an array of (char *) which is a list of completions for TEXT.
+ If there are no completions, return a NULL pointer.
+ The first entry in the returned array is the substitution for TEXT.
+ The remaining entries are the possible completions.
+ The array is terminated with a NULL pointer.
+
+ ENTRY_FUNCTION is a function of two args, and returns a (char *).
+ The first argument is TEXT.
+ The second is a state argument; it should be zero on the first call, and
+ non-zero on subsequent calls. It returns a NULL pointer to the caller
+ when there are no more matches.
+ */
+char **
+completion_matches (text, entry_function)
+ char *text;
+ char *(*entry_function) ();
+{
+ /* Number of slots in match_list. */
+ int match_list_size;
+
+ /* The list of matches. */
+ char **match_list =
+ (char **)xmalloc (((match_list_size = 10) + 1) * sizeof (char *));
+
+ /* Number of matches actually found. */
+ int matches = 0;
+
+ /* Temporary string binder. */
+ char *string;
+
+ match_list[1] = (char *)NULL;
+
+ while (string = (*entry_function) (text, matches))
+ {
+ if (matches + 1 == match_list_size)
+ match_list =
+ (char **)xrealloc (match_list,
+ ((match_list_size += 10) + 1) * sizeof (char *));
+
+ match_list[++matches] = string;
+ match_list[matches + 1] = (char *)NULL;
+ }
+
+ /* If there were any matches, then look through them finding out the
+ lowest common denominator. That then becomes match_list[0]. */
+ if (matches)
+ {
+ register int i = 1;
+ int low = 100000; /* Count of max-matched characters. */
+
+ /* If only one match, just use that. */
+ if (matches == 1)
+ {
+ match_list[0] = match_list[1];
+ match_list[1] = (char *)NULL;
+ }
+ else
+ {
+ /* Otherwise, compare each member of the list with
+ the next, finding out where they stop matching. */
+
+ while (i < matches)
+ {
+ register int c1, c2, si;
+
+ if (completion_case_fold)
+ {
+ for (si = 0;
+ (c1 = to_lower(match_list[i][si])) &&
+ (c2 = to_lower(match_list[i + 1][si]));
+ si++)
+ if (c1 != c2) break;
+ }
+ else
+ {
+ for (si = 0;
+ (c1 = match_list[i][si]) &&
+ (c2 = match_list[i + 1][si]);
+ si++)
+ if (c1 != c2) break;
+ }
+
+ if (low > si) low = si;
+ i++;
+ }
+ match_list[0] = (char *)xmalloc (low + 1);
+ strncpy (match_list[0], match_list[1], low);
+ match_list[0][low] = '\0';
+ }
+ }
+ else /* There were no matches. */
+ {
+ free (match_list);
+ match_list = (char **)NULL;
+ }
+ return (match_list);
+}
+
+/* Okay, now we write the entry_function for filename completion. In the
+ general case. Note that completion in the shell is a little different
+ because of all the pathnames that must be followed when looking up the
+ completion for a command. */
+char *
+filename_completion_function (text, state)
+ int state;
+ char *text;
+{
+ static DIR *directory;
+ static char *filename = (char *)NULL;
+ static char *dirname = (char *)NULL;
+ static char *users_dirname = (char *)NULL;
+ static int filename_len;
+
+ struct direct *entry = (struct direct *)NULL;
+
+ /* If we don't have any state, then do some initialization. */
+ if (!state)
+ {
+ char *temp;
+
+ if (dirname) free (dirname);
+ if (filename) free (filename);
+ if (users_dirname) free (users_dirname);
+
+ filename = savestring (text);
+ if (!*text) text = ".";
+ dirname = savestring (text);
+
+ temp = rindex (dirname, '/');
+
+ if (temp)
+ {
+ strcpy (filename, ++temp);
+ *temp = '\0';
+ }
+ else
+ strcpy (dirname, ".");
+
+ /* We aren't done yet. We also support the "~user" syntax. */
+
+ /* Save the version of the directory that the user typed. */
+ users_dirname = savestring (dirname);
+ {
+ char *tilde_expand (), *temp_dirname = tilde_expand (dirname);
+ free (dirname);
+ dirname = temp_dirname;
+#ifdef SHELL
+ {
+ extern int follow_symbolic_links;
+ char *make_absolute ();
+
+ if (follow_symbolic_links && (strcmp (dirname, ".") != 0))
+ {
+ temp_dirname = make_absolute (dirname, get_working_directory (""));
+
+ if (temp_dirname)
+ {
+ free (dirname);
+ dirname = temp_dirname;
+ }
+ }
+ }
+#endif /* SHELL */
+ }
+ directory = opendir (dirname);
+ filename_len = strlen (filename);
+
+ rl_filename_completion_desired = 1;
+ }
+
+ /* At this point we should entertain the possibility of hacking wildcarded
+ filenames, like /usr/man*\/te<TAB>. If the directory name contains
+ globbing characters, then build an array of directories to glob on, and
+ glob on the first one. */
+
+ /* Now that we have some state, we can read the directory. */
+
+ while (directory && (entry = readdir (directory)))
+ {
+ /* Special case for no filename.
+ All entries except "." and ".." match. */
+ if (!filename_len)
+ {
+ if ((strcmp (entry->d_name, ".") != 0) &&
+ (strcmp (entry->d_name, "..") != 0))
+ break;
+ }
+ else
+ {
+ /* Otherwise, if these match upto the length of filename, then
+ it is a match. */
+#ifdef TMB_SYSV
+ if ((strlen (entry->d_name) >= filename_len) &&
+ (strncmp (filename, entry->d_name, filename_len) == 0))
+#else
+ if ((entry->d_namlen >= filename_len) &&
+ (strncmp (filename, entry->d_name, filename_len) == 0))
+#endif /* TMB_SYSV */
+ {
+ break;
+ }
+ }
+ }
+
+ if (!entry)
+ {
+ if (directory)
+ {
+ closedir (directory);
+ directory = (DIR *)NULL;
+ }
+ return (char *)NULL;
+ }
+ else
+ {
+ char *temp;
+
+ if (dirname && (strcmp (dirname, ".") != 0))
+ {
+#ifdef TMB_SYSV
+ temp = (char *)xmalloc (1 + strlen (users_dirname)
+ + strlen (entry->d_name));
+#else
+ temp = (char *)xmalloc (1 + strlen (users_dirname)
+ + entry->d_namlen);
+#endif /* TMB_SYSV */
+ strcpy (temp, users_dirname);
+ strcat (temp, entry->d_name);
+ }
+ else
+ {
+ temp = (savestring (entry->d_name));
+ }
+ return (temp);
+ }
+}
+
+
+/* **************************************************************** */
+/* */
+/* Binding keys */
+/* */
+/* **************************************************************** */
+
+/* rl_add_defun (char *name, Function *function, int key)
+ Add NAME to the list of named functions. Make FUNCTION
+ be the function that gets called.
+ If KEY is not -1, then bind it. */
+rl_add_defun (name, function, key)
+ char *name;
+ Function *function;
+ int key;
+{
+ if (key != -1)
+ rl_bind_key (key, function);
+ rl_add_funmap_entry (name, function);
+}
+
+/* Bind KEY to FUNCTION. Returns non-zero if KEY is out of range. */
+int
+rl_bind_key (key, function)
+ int key;
+ Function *function;
+{
+ if (key < 0)
+ return (key);
+
+ if (key > 127 && key < 256)
+ {
+ if (keymap[ESC].type == ISKMAP)
+ {
+ Keymap escmap = (Keymap)keymap[ESC].function;
+
+ key -= 128;
+ escmap[key].type = ISFUNC;
+ escmap[key].function = function;
+ return (0);
+ }
+ return (key);
+ }
+
+ keymap[key].type = ISFUNC;
+ keymap[key].function = function;
+ return (0);
+}
+
+/* Bind KEY to FUNCTION in MAP. Returns non-zero in case of invalid
+ KEY. */
+int
+rl_bind_key_in_map (key, function, map)
+ int key;
+ Function *function;
+ Keymap map;
+{
+ int result;
+ Keymap oldmap = keymap;
+
+ keymap = map;
+ result = rl_bind_key (key, function);
+ keymap = oldmap;
+ return (result);
+}
+
+/* Make KEY do nothing in the currently selected keymap.
+ Returns non-zero in case of error. */
+int
+rl_unbind_key (key)
+ int key;
+{
+ return (rl_bind_key (key, (Function *)NULL));
+}
+
+/* Make KEY do nothing in MAP.
+ Returns non-zero in case of error. */
+int
+rl_unbind_key_in_map (key, map)
+ int key;
+ Keymap map;
+{
+ return (rl_bind_key_in_map (key, (Function *)NULL, map));
+}
+
+/* Bind the key sequence represented by the string KEYSEQ to
+ FUNCTION. This makes new keymaps as necessary. The initial
+ place to do bindings is in MAP. */
+rl_set_key (keyseq, function, map)
+ char *keyseq;
+ Function *function;
+ Keymap map;
+{
+ rl_generic_bind (ISFUNC, keyseq, function, map);
+}
+
+/* Bind the key sequence represented by the string KEYSEQ to
+ the string of characters MACRO. This makes new keymaps as
+ necessary. The initial place to do bindings is in MAP. */
+rl_macro_bind (keyseq, macro, map)
+ char *keyseq, *macro;
+ Keymap map;
+{
+ char *macro_keys = (char *)xmalloc (2 * (strlen (macro)));
+ int macro_keys_len;
+
+ if (rl_translate_keyseq (macro, macro_keys, &macro_keys_len))
+ {
+ free (macro_keys);
+ return;
+ }
+ rl_generic_bind (ISMACR, keyseq, macro_keys, map);
+}
+
+/* Bind the key sequence represented by the string KEYSEQ to
+ the arbitrary pointer DATA. TYPE says what kind of data is
+ pointed to by DATA, right now this can be a function (ISFUNC),
+ a macro (ISMACR), or a keymap (ISKMAP). This makes new keymaps
+ as necessary. The initial place to do bindings is in MAP. */
+rl_generic_bind (type, keyseq, data, map)
+ int type;
+ char *keyseq, *data;
+ Keymap map;
+{
+ char *keys;
+ int keys_len;
+ register int i;
+ int start;
+
+ /* If no keys to bind to, exit right away. */
+ if (!keyseq || !*keyseq)
+ {
+ if (type == ISMACR)
+ free (data);
+ return;
+ }
+
+ keys = (char *)alloca (1 + (2 * strlen (keyseq)));
+
+ /* Translate the ASCII representation of KEYSEQ into an array
+ of characters. Stuff the characters into ARRAY, and the
+ length of ARRAY into LENGTH. */
+ if (rl_translate_keyseq (keyseq, keys, &keys_len))
+ return;
+
+ /* Handle mapping of the ESC Key in vi mode */
+ start = 0;
+#ifdef VI_MODE
+ if ((rl_editing_mode == vi_mode) && (keys[0] == ESC))
+ {
+ start++;
+ map = vi_movement_keymap;
+ if(keys[1] == ESC)
+ {
+ extern KEYMAP_ENTRY_ARRAY vi_escape_keymap;
+
+ start++;
+ map = vi_escape_keymap;
+ }
+ }
+#endif
+
+ /* Bind keys, making new keymaps as necessary. */
+ for (i = start; i < keys_len; i++)
+ {
+ if (i + 1 < keys_len)
+ {
+ if (map[keys[i]].type != ISKMAP)
+ {
+ if (map[i].type == ISMACR)
+ free ((char *)map[i].function);
+
+ map[keys[i]].type = ISKMAP;
+ map[keys[i]].function = (Function *)rl_make_bare_keymap ();
+ }
+ map = (Keymap)map[keys[i]].function;
+ }
+ else
+ {
+ if (map[keys[i]].type == ISMACR)
+ free ((char *)map[keys[i]].function);
+
+ map[keys[i]].function = (Function *)data;
+ map[keys[i]].type = type;
+ }
+ }
+}
+
+/* Translate the ASCII representation of SEQ, stuffing the
+ values into ARRAY, an array of characters. LEN gets the
+ final length of ARRAY. Return non-zero if there was an
+ error parsing SEQ. */
+rl_translate_keyseq (seq, array, len)
+ char *seq, *array;
+ int *len;
+{
+ register int i, c, l = 0;
+
+ for (i = 0; c = seq[i]; i++)
+ {
+ if (c == '\\')
+ {
+ c = seq[++i];
+
+ if (!c)
+ break;
+
+ if (((c == 'C' || c == 'M') && seq[i + 1] == '-') ||
+ (c == 'e'))
+ {
+ /* Handle special case of backwards define. */
+ if (strncmp (&seq[i], "C-\\M-", 5) == 0)
+ {
+ array[l++] = ESC;
+ i += 5;
+ array[l++] = CTRL (to_upper (seq[i]));
+ if (!seq[i])
+ i--;
+ continue;
+ }
+
+ switch (c)
+ {
+ case 'M':
+ i++;
+ array[l++] = ESC;
+ break;
+
+ case 'C':
+ i += 2;
+ array[l++] = CTRL (to_upper (seq[i]));
+ break;
+
+ case 'e':
+ array[l++] = ESC;
+ }
+
+ continue;
+ }
+ }
+ array[l++] = c;
+ }
+
+ array[l] = '\0';
+ *len = l;
+ return (0);
+}
+
+/* Return a pointer to the function that STRING represents.
+ If STRING doesn't have a matching function, then a NULL pointer
+ is returned. */
+Function *
+rl_named_function (string)
+ char *string;
+{
+ register int i;
+ static int stricmp ();
+
+ for (i = 0; funmap[i]; i++)
+ if (stricmp (funmap[i]->name, string) == 0)
+ return (funmap[i]->function);
+ return ((Function *)NULL);
+}
+
+/* The last key bindings file read. */
+static char *last_readline_init_file = "~/.inputrc";
+
+/* Re-read the current keybindings file. */
+rl_re_read_init_file (count, ignore)
+ int count, ignore;
+{
+ rl_read_init_file (last_readline_init_file);
+}
+
+/* Do key bindings from a file. If FILENAME is NULL it defaults
+ to `~/.inputrc'. If the file existed and could be opened and
+ read, 0 is returned, otherwise errno is returned. */
+int
+rl_read_init_file (filename)
+ char *filename;
+{
+ int line_size, line_index;
+ char *line = (char *)xmalloc (line_size = 100);
+ char *openname;
+ FILE *file;
+
+ int c;
+
+ /* Default the filename. */
+ if (!filename)
+ filename = "~/.inputrc";
+
+ openname = tilde_expand (filename);
+
+ /* Open the file. */
+ file = fopen (openname, "r");
+ free (openname);
+
+ if (!file)
+ return (errno);
+
+ last_readline_init_file = filename;
+
+ /* Loop reading lines from the file. Lines that start with `#' are
+ comments, all other lines are commands for readline initialization. */
+ while ((c = getc(file)) != EOF)
+ {
+ /* If comment, flush to EOL. */
+ if (c == '#')
+ {
+ while ((c = getc(file)) != EOF && c != '\n');
+ if (c == EOF)
+ goto function_exit;
+ continue;
+ }
+
+ /* Otherwise, this is the start of a line. Read the
+ line from the file. */
+ line_index = 0;
+ while (c != EOF && c != '\n')
+ {
+ line[line_index++] = c;
+ if (line_index == line_size)
+ line = (char *)xrealloc (line, line_size += 100);
+ c = getc (file);
+ }
+ line[line_index] = '\0';
+
+ /* Parse the line. */
+ rl_parse_and_bind (line);
+ }
+
+function_exit:
+
+ free (line);
+ /* Close up the file and exit. */
+ fclose (file);
+ return (0);
+}
+
+
+/* **************************************************************** */
+/* */
+/* Parser Directives */
+/* */
+/* **************************************************************** */
+
+/* Conditionals. */
+
+/* Calling programs set this to have their argv[0]. */
+char *rl_readline_name = "other";
+
+/* Stack of previous values of parsing_conditionalized_out. */
+static unsigned char *if_stack = (unsigned char *)NULL;
+static int if_stack_depth = 0;
+static int if_stack_size = 0;
+
+/* Push parsing_conditionalized_out, and set parser state based on ARGS. */
+parser_if (args)
+ char *args;
+{
+ register int i;
+ static int stricmp ();
+
+ /* Push parser state. */
+ if (if_stack_depth + 1 >= if_stack_size)
+ {
+ if (!if_stack)
+ if_stack = (unsigned char *)xmalloc (if_stack_size = 20);
+ else
+ if_stack = (unsigned char *)xrealloc (if_stack, if_stack_size += 20);
+ }
+ if_stack[if_stack_depth++] = parsing_conditionalized_out;
+
+ /* We only check to see if the first word in ARGS is the same as the
+ value stored in rl_readline_name. */
+
+ /* Isolate first argument. */
+ for (i = 0; args[i] && !whitespace (args[i]); i++);
+
+ if (args[i])
+ args[i++] = '\0';
+
+ if (stricmp (args, rl_readline_name) == 0)
+ parsing_conditionalized_out = 0;
+ else
+ parsing_conditionalized_out = 1;
+}
+
+/* Invert the current parser state if there is anything on the stack. */
+parser_else (args)
+ char *args;
+{
+ if (if_stack_depth)
+ parsing_conditionalized_out = !parsing_conditionalized_out;
+ else
+ {
+ /* *** What, no error message? *** */
+ }
+}
+
+/* Terminate a conditional, popping the value of
+ parsing_conditionalized_out from the stack. */
+parser_endif (args)
+ char *args;
+{
+ if (if_stack_depth)
+ parsing_conditionalized_out = if_stack[--if_stack_depth];
+ else
+ {
+ /* *** What, no error message? *** */
+ }
+}
+
+/* Associate textual names with actual functions. */
+static struct {
+ char *name;
+ Function *function;
+} parser_directives [] = {
+ { "if", parser_if },
+ { "endif", parser_endif },
+ { "else", parser_else },
+ { (char *)0x0, (Function *)0x0 }
+};
+
+/* Handle a parser directive. STATEMENT is the line of the directive
+ without any leading `$'. */
+static int
+handle_parser_directive (statement)
+ char *statement;
+{
+ register int i;
+ char *directive, *args;
+ static int stricmp ();
+
+ /* Isolate the actual directive. */
+
+ /* Skip whitespace. */
+ for (i = 0; whitespace (statement[i]); i++);
+
+ directive = &statement[i];
+
+ for (; statement[i] && !whitespace (statement[i]); i++);
+
+ if (statement[i])
+ statement[i++] = '\0';
+
+ for (; statement[i] && whitespace (statement[i]); i++);
+
+ args = &statement[i];
+
+ /* Lookup the command, and act on it. */
+ for (i = 0; parser_directives[i].name; i++)
+ if (stricmp (directive, parser_directives[i].name) == 0)
+ {
+ (*parser_directives[i].function) (args);
+ return (0);
+ }
+
+ /* *** Should an error message be output? */
+ return (1);
+}
+
+/* Read the binding command from STRING and perform it.
+ A key binding command looks like: Keyname: function-name\0,
+ a variable binding command looks like: set variable value.
+ A new-style keybinding looks like "\C-x\C-x": exchange-point-and-mark. */
+rl_parse_and_bind (string)
+ char *string;
+{
+ extern char *possible_control_prefixes[], *possible_meta_prefixes[];
+ char *funname, *kname;
+ static int substring_member_of_array (), stricmp ();
+ register int c;
+ int key, i;
+
+ if (!string || !*string || *string == '#')
+ return;
+
+ /* If this is a parser directive, act on it. */
+ if (*string == '$')
+ {
+ handle_parser_directive (&string[1]);
+ return;
+ }
+
+ /* If we are supposed to be skipping parsing right now, then do it. */
+ if (parsing_conditionalized_out)
+ return;
+
+ i = 0;
+ /* If this keyname is a complex key expression surrounded by quotes,
+ advance to after the matching close quote. */
+ if (*string == '"')
+ {
+ for (i = 1; c = string[i]; i++)
+ {
+ if (c == '"' && string[i - 1] != '\\')
+ break;
+ }
+ }
+
+ /* Advance to the colon (:) or whitespace which separates the two objects. */
+ for (; (c = string[i]) && c != ':' && c != ' ' && c != '\t'; i++ );
+
+ /* Mark the end of the command (or keyname). */
+ if (string[i])
+ string[i++] = '\0';
+
+ /* If this is a command to set a variable, then do that. */
+ if (stricmp (string, "set") == 0)
+ {
+ char *var = string + i;
+ char *value;
+
+ /* Make VAR point to start of variable name. */
+ while (*var && whitespace (*var)) var++;
+
+ /* Make value point to start of value string. */
+ value = var;
+ while (*value && !whitespace (*value)) value++;
+ if (*value)
+ *value++ = '\0';
+ while (*value && whitespace (*value)) value++;
+
+ rl_variable_bind (var, value);
+ return;
+ }
+
+ /* Skip any whitespace between keyname and funname. */
+ for (; string[i] && whitespace (string[i]); i++);
+ funname = &string[i];
+
+ /* Now isolate funname.
+ For straight function names just look for whitespace, since
+ that will signify the end of the string. But this could be a
+ macro definition. In that case, the string is quoted, so skip
+ to the matching delimiter. */
+ if (*funname == '\'' || *funname == '"')
+ {
+ int delimiter = string[i++];
+
+ for (; c = string[i]; i++)
+ {
+ if (c == delimiter && string[i - 1] != '\\')
+ break;
+ }
+ if (c)
+ i++;
+ }
+
+ /* Advance to the end of the string. */
+ for (; string[i] && !whitespace (string[i]); i++);
+
+ /* No extra whitespace at the end of the string. */
+ string[i] = '\0';
+
+ /* If this is a new-style key-binding, then do the binding with
+ rl_set_key (). Otherwise, let the older code deal with it. */
+ if (*string == '"')
+ {
+ char *seq = (char *)alloca (1 + strlen (string));
+ register int j, k = 0;
+
+ for (j = 1; string[j]; j++)
+ {
+ if (string[j] == '"' && string[j - 1] != '\\')
+ break;
+
+ seq[k++] = string[j];
+ }
+ seq[k] = '\0';
+
+ /* Binding macro? */
+ if (*funname == '\'' || *funname == '"')
+ {
+ j = strlen (funname);
+
+ if (j && funname[j - 1] == *funname)
+ funname[j - 1] = '\0';
+
+ rl_macro_bind (seq, &funname[1], keymap);
+ }
+ else
+ rl_set_key (seq, rl_named_function (funname), keymap);
+
+ return;
+ }
+
+ /* Get the actual character we want to deal with. */
+ kname = rindex (string, '-');
+ if (!kname)
+ kname = string;
+ else
+ kname++;
+
+ key = glean_key_from_name (kname);
+
+ /* Add in control and meta bits. */
+ if (substring_member_of_array (string, possible_control_prefixes))
+ key = CTRL (to_upper (key));
+
+ if (substring_member_of_array (string, possible_meta_prefixes))
+ key = META (key);
+
+ /* Temporary. Handle old-style keyname with macro-binding. */
+ if (*funname == '\'' || *funname == '"')
+ {
+ char seq[2];
+ int fl = strlen (funname);
+
+ seq[0] = key; seq[1] = '\0';
+ if (fl && funname[fl - 1] == *funname)
+ funname[fl - 1] = '\0';
+
+ rl_macro_bind (seq, &funname[1], keymap);
+ }
+ else
+ rl_bind_key (key, rl_named_function (funname));
+}
+
+rl_variable_bind (name, value)
+ char *name, *value;
+{
+ static int strnicmp (), stricmp ();
+
+ if (stricmp (name, "editing-mode") == 0)
+ {
+ if (strnicmp (value, "vi", 2) == 0)
+ {
+#ifdef VI_MODE
+ keymap = vi_insertion_keymap;
+ rl_editing_mode = vi_mode;
+#endif /* VI_MODE */
+ }
+ else if (strnicmp (value, "emacs", 5) == 0)
+ {
+ keymap = emacs_standard_keymap;
+ rl_editing_mode = emacs_mode;
+ }
+ }
+ else if (stricmp (name, "horizontal-scroll-mode") == 0)
+ {
+ if (!*value || stricmp (value, "On") == 0)
+ horizontal_scroll_mode = 1;
+ else
+ horizontal_scroll_mode = 0;
+ }
+}
+
+/* Return the character which matches NAME.
+ For example, `Space' returns ' '. */
+
+typedef struct {
+ char *name;
+ int value;
+} assoc_list;
+
+assoc_list name_key_alist[] = {
+ { "Space", ' ' },
+ { "SPC", ' ' },
+ { "Rubout", 0x7f },
+ { "DEL", 0x7f },
+ { "Tab", 0x09 },
+ { "Newline", '\n' },
+ { "Return", '\r' },
+ { "RET", '\r' },
+ { "LFD", '\n' },
+ { "Escape", '\033' },
+ { "ESC", '\033' },
+
+ { (char *)0x0, 0 }
+};
+
+int
+glean_key_from_name (name)
+ char *name;
+{
+ register int i;
+ static int stricmp ();
+
+ for (i = 0; name_key_alist[i].name; i++)
+ if (stricmp (name, name_key_alist[i].name) == 0)
+ return (name_key_alist[i].value);
+
+ return (*name);
+}
+
+
+/* **************************************************************** */
+/* */
+/* String Utility Functions */
+/* */
+/* **************************************************************** */
+
+/* Return non-zero if any members of ARRAY are a substring in STRING. */
+static int
+substring_member_of_array (string, array)
+ char *string, **array;
+{
+ static char *strindex ();
+
+ while (*array)
+ {
+ if (strindex (string, *array))
+ return (1);
+ array++;
+ }
+ return (0);
+}
+
+/* Whoops, Unix doesn't have strnicmp. */
+
+/* Compare at most COUNT characters from string1 to string2. Case
+ doesn't matter. */
+static int
+strnicmp (string1, string2, count)
+ char *string1, *string2;
+{
+ register char ch1, ch2;
+
+ while (count) {
+ ch1 = *string1++;
+ ch2 = *string2++;
+ if (to_upper(ch1) == to_upper(ch2))
+ count--;
+ else break;
+ }
+ return (count);
+}
+
+/* strcmp (), but caseless. */
+static int
+stricmp (string1, string2)
+ char *string1, *string2;
+{
+ register char ch1, ch2;
+
+ while (*string1 && *string2) {
+ ch1 = *string1++;
+ ch2 = *string2++;
+ if (to_upper(ch1) != to_upper(ch2))
+ return (1);
+ }
+ return (*string1 | *string2);
+}
+
+/* Determine if s2 occurs in s1. If so, return a pointer to the
+ match in s1. The compare is case insensitive. */
+static char *
+strindex (s1, s2)
+ register char *s1, *s2;
+{
+ register int i, l = strlen (s2);
+ register int len = strlen (s1);
+
+ for (i = 0; (len - i) >= l; i++)
+ if (strnicmp (&s1[i], s2, l) == 0)
+ return (s1 + i);
+ return ((char *)NULL);
+}
+
+
+#ifdef STATIC_MALLOC
+
+/* **************************************************************** */
+/* */
+/* xmalloc and xrealloc () */
+/* */
+/* **************************************************************** */
+
+static char *
+xmalloc (bytes)
+ int bytes;
+{
+ static memory_error_and_abort ();
+ char *temp = (char *)malloc (bytes);
+
+ if (!temp)
+ memory_error_and_abort ();
+ return (temp);
+}
+
+static char *
+xrealloc (pointer, bytes)
+ char *pointer;
+ int bytes;
+{
+ static memory_error_and_abort ();
+ char *temp = (char *)realloc (pointer, bytes);
+
+ if (!temp)
+ memory_error_and_abort ();
+ return (temp);
+}
+
+static
+memory_error_and_abort ()
+{
+ fprintf (stderr, "readline: Out of virtual memory!\n");
+ abort ();
+}
+#endif /* STATIC_MALLOC */
+
+
+/* **************************************************************** */
+/* */
+/* Testing Readline */
+/* */
+/* **************************************************************** */
+
+#ifdef 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:
+ */