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Diffstat (limited to 'readline/readline.c')
| -rw-r--r-- | readline/readline.c | 5641 |
1 files changed, 5641 insertions, 0 deletions
diff --git a/readline/readline.c b/readline/readline.c new file mode 100644 index 00000000000..b05a7c97e5b --- /dev/null +++ b/readline/readline.c @@ -0,0 +1,5641 @@ +/* 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> + +#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) || defined (Xenix) +#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 */ +#if defined (Xenix) +#include <sys/ndir.h> +#else +#ifdef hpux +#include <ndir.h> +#else +#include <dirent.h> +#define direct dirent +#define d_namlen d_reclen +#endif /* hpux */ +#endif /* xenix */ +#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 delete_chars (); +static insert_some_chars (); + +#ifdef VOID_SIGHANDLER +#define sighandler void +#else +#define sighandler int +#endif + +/* This typedef is equivalant to the one for Function; it allows us + to say SigHandler *foo = signal (SIGKILL, SIG_IGN); */ +typedef sighandler SigHandler (); + +/* If on, then readline handles signals in a way that doesn't screw. */ +#define HANDLE_SIGNALS + + +/* **************************************************************** */ +/* */ +/* 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; + +/* If non-zero, then this is the address of a function to call when + completing on a directory name. The function is called with + the address of a string (the current directory name) as an arg. */ +Function *rl_symbolic_link_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 + + +/* **************************************************************** */ +/* */ +/* `Forward' declarations */ +/* */ +/* **************************************************************** */ + +/* Non-zero means do not parse any lines other than comments and + parser directives. */ +static unsigned char parsing_conditionalized_out = 0; + +/* Caseless strcmp (). */ +static int stricmp (), strnicmp (); + +/* Non-zero means to save keys that we dispatch on in a kbd macro. */ +static int defining_kbd_macro = 0; + + +/* **************************************************************** */ +/* */ +/* 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 HANDLE_SIGNALS + rl_set_signals (); +#endif + + value = readline_internal (); + rl_deprep_terminal (); + +#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)); +} + + +/* **************************************************************** */ +/* */ +/* Signal Handling */ +/* */ +/* **************************************************************** */ + +#ifdef SIGWINCH +static SigHandler *old_sigwinch = (SigHandler *)NULL; + +static sighandler +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 sighandler +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 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); + + if (old_tstp == (SigHandler *)SIG_IGN) + { + signal (SIGTTOU, SIG_IGN); + signal (SIGTTIN, SIG_IGN); + } +#endif + +#ifdef SIGWINCH + old_sigwinch = (SigHandler *)signal (SIGWINCH, rl_handle_sigwinch); +#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 + +#ifdef SIGWINCH + signal (SIGWINCH, old_sigwinch); +#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. + Return the key in KEY. + Result is KEY if there was a key, or 0 if there wasn't. */ +int +rl_get_char (key) + int *key; +{ + if (push_index == pop_index) + return (0); + + *key = ibuffer[pop_index++]; + + if (pop_index >= ibuffer_len) + pop_index = 0; + + return (1); +} + +/* Stuff KEY into the *front* of the input buffer. + Returns non-zero if successful, zero if there is + no space left in the buffer. */ +int +rl_unget_char (key) + int key; +{ + if (ibuffer_space ()) + { + pop_index--; + if (pop_index < 0) + pop_index = ibuffer_len - 1; + ibuffer[pop_index] = key; + return (1); + } + return (0); +} + +/* If a character is available to be read, then read it + and stuff it into IBUFFER. Otherwise, just return. */ +rl_gather_tyi () +{ + int tty = fileno (in_stream); + register int tem, result = -1; + long chars_avail; + char input; + +#ifdef FIONREAD + result = ioctl (tty, FIONREAD, &chars_avail); +#endif + + if (result == -1) + { + fcntl (tty, F_SETFL, O_NDELAY); + chars_avail = read (tty, &input, 1); + fcntl (tty, F_SETFL, 0); + if (chars_avail == -1 && errno == EAGAIN) + return; + } + + tem = ibuffer_space (); + + if (chars_avail > tem) + chars_avail = tem; + + /* One cannot read all of the available input. I can only read a single + character at a time, or else programs which require input can be + thwarted. If the buffer is larger than one character, I lose. + Damn! */ + if (tem < ibuffer_len) + chars_avail = 0; + + if (result != -1) + { + while (chars_avail--) + rl_stuff_char (rl_getc (in_stream)); + } + else + { + if (chars_avail) + rl_stuff_char (input); + } +} + +/* 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); + + /* If the user has an event function, then call it periodically. */ + if (rl_event_hook) + { + while (rl_event_hook && !rl_get_char (&c)) + { + (*rl_event_hook) (); + rl_gather_tyi (); + } + } + else + { + if (!rl_get_char (&c)) + c = rl_getc (in_stream); + } + } + +#ifdef NEVER /* This breaks supdup to 4.0.3c machines. */ +#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 */ +#endif + + return (c); +} + +/* I'm beginning to hate the declaration rules for various compilers. */ +static void add_macro_char (); + +/* 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) + 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 */ +/* */ +/* **************************************************************** */ + +/* The currently executing macro string. If this is non-zero, + then it is a malloc ()'ed string where input is coming from. */ +static char *executing_macro = (char *)NULL; + +/* The offset in the above string to the next character to be read. */ +static int executing_macro_index = 0; + +/* The current macro string being built. Characters get stuffed + in here by add_macro_char (). */ +static char *current_macro = (char *)NULL; + +/* The size of the buffer allocated to current_macro. */ +static int current_macro_size = 0; + +/* The index at which characters are being added to current_macro. */ +static int current_macro_index = 0; + +/* A structure used to save nested macro strings. + It is a linked list of string/index for each saved macro. */ +struct saved_macro { + struct saved_macro *next; + char *string; + int index; +}; + +/* The list of saved macros. */ +struct saved_macro *macro_list = (struct saved_macro *)NULL; + +/* Forward declarations of static functions. Thank you C. */ +static void push_executing_macro (), pop_executing_macro (); + +/* This one has to be declared earlier in the file. */ +/* static void add_macro_char (); */ + +/* Set up to read subsequent input from STRING. + STRING is free ()'ed when we are done with it. */ +static +with_macro_input (string) + char *string; +{ + push_executing_macro (); + executing_macro = string; + executing_macro_index = 0; +} + +/* Return the next character available from a macro, or 0 if + there are no macro characters. */ +static int +next_macro_key () +{ + if (!executing_macro) + return (0); + + if (!executing_macro[executing_macro_index]) + { + pop_executing_macro (); + return (next_macro_key ()); + } + + return (executing_macro[executing_macro_index++]); +} + +/* Save the currently executing macro on a stack of saved macros. */ +static void +push_executing_macro () +{ + struct saved_macro *saver; + + saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro)); + saver->next = macro_list; + saver->index = executing_macro_index; + saver->string = executing_macro; + + macro_list = saver; +} + +/* Discard the current macro, replacing it with the one + on the top of the stack of saved macros. */ +static void +pop_executing_macro () +{ + if (executing_macro) + free (executing_macro); + + executing_macro = (char *)NULL; + executing_macro_index = 0; + + if (macro_list) + { + struct saved_macro *disposer = macro_list; + executing_macro = macro_list->string; + executing_macro_index = macro_list->index; + macro_list = macro_list->next; + free (disposer); + } +} + +/* Add a character to the macro being built. */ +static void +add_macro_char (c) + int c; +{ + if (current_macro_index + 1 >= current_macro_size) + { + if (!current_macro) + current_macro = (char *)xmalloc (current_macro_size = 25); + else + current_macro = + (char *)xrealloc (current_macro, current_macro_size += 25); + } + + current_macro[current_macro_index++] = c; + current_macro[current_macro_index] = '\0'; +} + +/* Begin defining a keyboard macro. + Keystrokes are recorded as they are executed. + End the definition with rl_end_kbd_macro (). + If a numeric argument was explicitly typed, then append this + definition to the end of the existing macro, and start by + re-executing the existing macro. */ +rl_start_kbd_macro (ignore1, ignore2) + int ignore1, ignore2; +{ + if (defining_kbd_macro) + rl_abort (); + + if (rl_explicit_arg) + { + if (current_macro) + with_macro_input (savestring (current_macro)); + } + else + current_macro_index = 0; + + defining_kbd_macro = 1; +} + +/* Stop defining a keyboard macro. + A numeric argument says to execute the macro right now, + that many times, counting the definition as the first time. */ +rl_end_kbd_macro (count, ignore) + int count, ignore; +{ + if (!defining_kbd_macro) + rl_abort (); + + current_macro_index -= (rl_key_sequence_length - 1); + current_macro[current_macro_index] = '\0'; + + defining_kbd_macro = 0; + + rl_call_last_kbd_macro (--count, 0); +} + +/* Execute the most recently defined keyboard macro. + COUNT says how many times to execute it. */ +rl_call_last_kbd_macro (count, ignore) + int count, ignore; +{ + if (!current_macro) + rl_abort (); + + while (count--) + with_macro_input (savestring (current_macro)); +} + + +/* **************************************************************** */ +/* */ +/* 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 NEW_TTY_DRIVER + 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, <) != -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 */ +#else /* not NEW_TTY_DRIVER */ + struct termio ttybuff; + int tty = fileno (rl_instream); + + if (ioctl (tty, TCGETA, &ttybuff) != -1) + { + int erase = ttybuff.c_cc[VERASE]; + int kill = ttybuff.c_cc[VKILL]; + + if (erase != -1 && keymap[(unsigned char)erase].type == ISFUNC) + keymap[(unsigned char)erase].function = rl_rubout; + + if (kill != -1 && keymap[(unsigned char)kill].type == ISFUNC) + keymap[(unsigned char)kill].function = rl_unix_line_discard; + } +#endif /* NEW_TTY_DRIVER */ +} + + +/* **************************************************************** */ +/* */ +/* 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. */ +static int horizontal_scroll_mode = 0; + +/* Non-zero means to display an asterisk at the starts of history lines + which have been modified. */ +static int mark_modified_lines = 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 (); +static void output_character_function (); +static int compare_strings (); + +/* 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 (mark_modified_lines && 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) + { + output_some_chars (nfd, (ne - nfd)); + last_c_pos += (ne - nfd); + } + else + { + if (*ols) + { + insert_some_chars (nfd, lendiff); + last_c_pos += lendiff; + } + 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; + + /* 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); + + /* "An application program can assume that the terminal can do + character insertion if *any one of* the capabilities `IC', + `im', `ic' or `ip' is provided." But we can't do anything if + only `ip' is provided, so... */ + terminal_can_insert = (term_IC || term_im || term_ic); + + term_up = tgetstr ("up", &buffer); + term_dc = tgetstr ("dc", &buffer); + term_DC = tgetstr ("DC", &buffer); +} + +/* 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); + } +} + +/* Insert COUNT character from STRING to the output stream. */ +static +insert_some_chars (string, count) + char *string; + int count; +{ + /* If IC is defined, then we do not have to "enter" insert mode. */ + if (term_IC) + { + char *tgoto (), *buffer; + buffer = tgoto (term_IC, 0, count); + tputs (buffer, 1, output_character_function); + output_some_chars (string, count); + } + else + { + register int i; + + /* If we have to turn on insert-mode, then do so. */ + if (term_im && *term_im) + tputs (term_im, 1, output_character_function); + + /* If there is a special command for inserting characters, then + use that first to open up the space. */ + if (term_ic && *term_ic) + { + for (i = count; i--; ) + tputs (term_ic, 1, output_character_function); + } + + /* Print the text. */ + output_some_chars (string, count); + + /* If there is a string to turn off insert mode, we had best use + it now. */ + 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 */ +/* */ +/* **************************************************************** */ + +/* Non-zero means that the terminal is in a prepped state. */ +static int terminal_prepped = 0; + +#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); + int oldmask = sigblock (sigmask (SIGINT)); + + if (!terminal_prepped) + { + /* 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 defined (TIOCLGET) + ioctl (tty, TIOCLGET, &local_mode_flags); +#endif + + /* 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) && (the_ttybuff.sg_flags & EVENP)) + { +#ifdef PASS8 + the_ttybuff.sg_flags |= PASS8; +#endif + /* Hack on local mode flags if we can. */ +#if defined (TIOCLGET) && defined (LPASS8) + { + int flags; + flags = local_mode_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); + + terminal_prepped = 1; + } + sigsetmask (oldmask); +} + +/* Restore the terminal to its original state. */ +static +rl_deprep_terminal () +{ + int tty = fileno (rl_instream); + int oldmask = sigblock (sigmask (SIGINT)); + + if (terminal_prepped) + { + the_ttybuff.sg_flags = original_tty_flags; + ioctl (tty, TIOCSETN, &the_ttybuff); + readline_echoing_p = 1; + +#if defined (TIOCLGET) + ioctl (tty, TIOCLSET, &local_mode_flags); +#endif + +#ifdef TIOCSLTC + ioctl (tty, TIOCSLTC, &original_ltchars); +#endif + +#ifdef TIOCSETC + ioctl (tty, TIOCSETC, &original_tchars); +#endif + terminal_prepped = 0; + } + + sigsetmask (oldmask); +} + +#else /* !defined (NEW_TTY_DRIVER) */ + +#if !defined (VMIN) +#define VMIN VEOF +#endif + +#if !defined (VTIME) +#define VTIME VEOL +#endif + +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|IXOFF|IXANY|ISTRIP|INPCK); + +#if !defined (HANDLE_SIGNALS) + tio.c_lflag &= ~ISIG; +#endif + + tio.c_cc[VMIN] = 1; + tio.c_cc[VTIME] = 0; + ioctl (tty, TCSETAW, &tio); + ioctl (tty, TCXONC, 1); /* Simulate a ^Q. */ +} + +static +rl_deprep_terminal () +{ + int tty = fileno (rl_instream); + ioctl (tty, TCSETAW, &otio); + ioctl (tty, TCXONC, 1); /* Simulate a ^Q. */ +} +#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; +{ + char *rindex (); + 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. */ +static 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; + extern char *term_clreol; + + move_vert(curr_line); + move_cursor_relative (0, the_line); /* XXX is this right */ + + if (term_clreol) + tputs (term_clreol, 1, output_character_function); + + 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; + + 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 decreaser; + + string = (char *)alloca (1024 + 1); + + for (i = 0; i < 1024; i++) + string[i] = c; + + while (count) + { + decreaser = (count > 1024 ? 1024 : count); + string[decreaser] = '\0'; + rl_insert_text (string); + count -= decreaser; + } + return; + } + + /* We are inserting a single character. + If there is pending input, then make a string of all of the + pending characters that are bound to rl_insert, and insert + them all. */ + if (any_typein) + { + int key = 0, t; + + i = 0; + string = (char *)alloca (ibuffer_len + 1); + string[i++] = c; + + while ((t = rl_get_char (&key)) && + (keymap[key].type == ISFUNC && + keymap[key].function == rl_insert)) + string[i++] = key; + + if (t) + 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 (); + rl_insert (count, c); +} + +/* Insert a tab character. */ +rl_tab_insert (count) + int count; +{ + rl_insert (count, '\t'); +} + +/* What to do when a NEWLINE is pressed. We accept the whole line. + KEY is the key that invoked this command. I guess it could have + meaning in the future. */ +rl_newline (count, key) + int count, key; +{ + + rl_done = 1; + +#ifdef VI_MODE + { + extern int vi_doing_insert; + 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--; + visible_line[last_c_pos] = '\0'; + 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, invoking_key; +{ + if (count < 0) + { + rl_rubout (-count); + return; + } + + if (rl_point == rl_end) + { + ding (); + return; + } + + if (count > 1) + { + int orig_point = rl_point; + rl_forward (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); +} + +/* 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 (); + 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: + if (matches[0]) + { + 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 *rindex (), *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 *rindex (), *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 *rindex (), *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); + } +} + +/* Stupid comparison routine for qsort () ing strings. */ +static int +compare_strings (s1, s2) + char **s1, **s2; +{ + return (strcmp (*s1, *s2)); +} + +/* 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 (); + + /* 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 *rindex (), *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; + + if (rl_symbolic_link_hook) + (*rl_symbolic_link_hook) (&dirname); + } + 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, ¯o_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; + + /* 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; + + /* Bind keys, making new keymaps as necessary. */ + for (i = 0; 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; + } + + *len = l; + array[l] = '\0'; + 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; + + 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; +{ + extern int errno; + 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 = rl_getc (file)) != EOF) + { + /* If comment, flush to EOL. */ + if (c == '#') + { + while ((c = rl_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 = rl_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; + + /* 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; + + /* 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 *rindex (), *funname, *kname; + static int substring_member_of_array (); + 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; +{ + 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; + } + else if (stricmp (name, "mark-modified-lines") == 0) + { + if (!*value || stricmp (value, "On") == 0) + mark_modified_lines = 1; + else + mark_modified_lines = 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; + + 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); +} + + +/* **************************************************************** */ +/* */ +/* SYSV Support */ +/* */ +/* **************************************************************** */ + +/* Since system V reads input differently than we do, I have to + make a special version of getc for that. */ + +#ifdef SYSV + +extern int errno; +#include <sys/errno.h> + +int +rl_getc (stream) + FILE *stream; +{ + int result; + unsigned char c; + + while (1) + { + result = read (fileno (stream), &c, sizeof (char)); + if (result == sizeof (char)) + return (c); + + if (errno != EINTR) + return (EOF); + } +} +#else +int +rl_getc (stream) + FILE *stream; +{ + return (getc (stream)); +} +#endif + +#ifdef STATIC_MALLOC + +/* **************************************************************** */ +/* */ +/* xmalloc and xrealloc () */ +/* */ +/* **************************************************************** */ + +static void memory_error_and_abort (); + +static char * +xmalloc (bytes) + int bytes; +{ + char *temp = (char *)malloc (bytes); + + if (!temp) + memory_error_and_abort (); + return (temp); +} + +static char * +xrealloc (pointer, bytes) + char *pointer; + int bytes; +{ + char *temp = (char *)realloc (pointer, bytes); + + if (!temp) + memory_error_and_abort (); + return (temp); +} + +static void +memory_error_and_abort () +{ + fprintf (stderr, "readline: Out of virtual memory!\n"); + abort (); +} +#endif /* STATIC_MALLOC */ + + +/* **************************************************************** */ +/* */ +/* Testing Readline */ +/* */ +/* **************************************************************** */ + +#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: + */ |