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Diffstat (limited to 'gnu/lib/libreadline/readline.c')
| -rw-r--r-- | gnu/lib/libreadline/readline.c | 3539 |
1 files changed, 0 insertions, 3539 deletions
diff --git a/gnu/lib/libreadline/readline.c b/gnu/lib/libreadline/readline.c deleted file mode 100644 index 59fbc32..0000000 --- a/gnu/lib/libreadline/readline.c +++ /dev/null @@ -1,3539 +0,0 @@ -/* readline.c -- a general facility for reading lines of input - with emacs style editing and completion. */ - -/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. - - This file is part of the GNU Readline Library, a library for - reading lines of text with interactive input and history editing. - - The GNU Readline Library is free software; you can redistribute it - and/or modify it under the terms of the GNU General Public License - as published by the Free Software Foundation; either version 1, or - (at your option) any later version. - - The GNU Readline Library is distributed in the hope that it will be - useful, but WITHOUT ANY WARRANTY; without even the implied warranty - of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - The GNU General Public License is often shipped with GNU software, and - is generally kept in a file called COPYING or LICENSE. If you do not - have a copy of the license, write to the Free Software Foundation, - 675 Mass Ave, Cambridge, MA 02139, USA. */ -#define READLINE_LIBRARY - -#include <stdio.h> -#include <sys/types.h> -#include <fcntl.h> -#if !defined (NO_SYS_FILE) -# include <sys/file.h> -#endif /* !NO_SYS_FILE */ -#include <signal.h> - -#if defined (HAVE_UNISTD_H) -# include <unistd.h> -#endif /* HAVE_UNISTD_H */ - -#if defined (HAVE_STDLIB_H) -# include <stdlib.h> -#else -# include "ansi_stdlib.h" -#endif /* HAVE_STDLIB_H */ - -#include <errno.h> -/* Not all systems declare ERRNO in errno.h... and some systems #define it! */ -#if !defined (errno) -extern int errno; -#endif /* !errno */ - -#include <setjmp.h> - -#include "posixstat.h" - -/* System-specific feature definitions and include files. */ -#include "rldefs.h" - -#if defined (GWINSZ_IN_SYS_IOCTL) || (defined (VSTATUS) && !defined (SunOS4)) -# include <sys/ioctl.h> -#endif /* GWINSZ_IN_SYS_IOCTL || VSTATUS */ - -/* Some standard library routines. */ -#include "readline.h" -#include "history.h" - -/* NOTE: Functions and variables prefixed with `_rl_' are - pseudo-global: they are global so they can be shared - between files in the readline library, but are not intended - to be visible to readline callers. */ - -/* Functions imported from other files in the library. */ -extern char *tgetstr (); -extern void rl_prep_terminal (), rl_deprep_terminal (); - -extern void _rl_bind_if_unbound (); - -/* External redisplay functions and variables from display.c */ -extern void _rl_move_vert (); -extern void _rl_update_final (); - -extern void _rl_erase_at_end_of_line (); -extern void _rl_move_cursor_relative (); - -extern int _rl_vis_botlin; -extern int _rl_last_c_pos; -extern int _rl_horizontal_scroll_mode; -extern int rl_display_fixed; -extern char *rl_display_prompt; - -/* Variables imported from complete.c. */ -extern char *rl_completer_word_break_characters; -extern char *rl_basic_word_break_characters; -extern int rl_completion_query_items; -extern int rl_complete_with_tilde_expansion; - -#if defined (VI_MODE) -extern void _rl_vi_set_last (); -extern void _rl_vi_reset_last (); -extern void _rl_vi_done_inserting (); -#endif /* VI_MODE */ - -/* Forward declarations used in this file. */ -void _rl_free_history_entry (); - -int _rl_dispatch (); -void _rl_set_screen_size (); -int _rl_output_character_function (); - -static char *readline_internal (); -static void readline_initialize_everything (); -static int init_terminal_io (); -static void start_using_history (); -static void bind_arrow_keys (); - -#if !defined (__GO32__) -static void readline_default_bindings (); -#endif /* !__GO32__ */ - -#if defined (__GO32__) -# include <sys/pc.h> -# undef HANDLE_SIGNALS -#endif /* __GO32__ */ - -#if defined (STATIC_MALLOC) -static char *xmalloc (), *xrealloc (); -#else -extern char *xmalloc (), *xrealloc (); -#endif /* STATIC_MALLOC */ - - -/* **************************************************************** */ -/* */ -/* Line editing input utility */ -/* */ -/* **************************************************************** */ - -static char *LibraryVersion = "2.0"; - -/* A pointer to the keymap that is currently in use. - By default, it is the standard emacs keymap. */ -Keymap _rl_keymap = emacs_standard_keymap; - -/* The current style of editing. */ -int rl_editing_mode = emacs_mode; - -/* Non-zero if the previous command was a kill command. */ -static int last_command_was_kill = 0; - -/* The current value of the numeric argument specified by the user. */ -int rl_numeric_arg = 1; - -/* Non-zero if an argument was typed. */ -int rl_explicit_arg = 0; - -/* Temporary value used while generating the argument. */ -int rl_arg_sign = 1; - -/* Non-zero means we have been called at least once before. */ -static int rl_initialized = 0; - -/* If non-zero, this program is running in an EMACS buffer. */ -static int running_in_emacs = 0; - -/* The current offset in the current input line. */ -int rl_point; - -/* Mark in the current input line. */ -int rl_mark; - -/* Length of the current input line. */ -int rl_end; - -/* Make this non-zero to return the current input_line. */ -int rl_done; - -/* The last function executed by readline. */ -Function *rl_last_func = (Function *)NULL; - -/* Top level environment for readline_internal (). */ -static jmp_buf readline_top_level; - -/* The streams we interact with. */ -static FILE *in_stream, *out_stream; - -/* The names of the streams that we do input and output to. */ -FILE *rl_instream = (FILE *)NULL; -FILE *rl_outstream = (FILE *)NULL; - -/* Non-zero means echo characters as they are read. */ -int readline_echoing_p = 1; - -/* Current prompt. */ -char *rl_prompt; -int rl_visible_prompt_length = 0; - -/* The number of characters read in order to type this complete command. */ -int rl_key_sequence_length = 0; - -/* If non-zero, then this is the address of a function to call just - before readline_internal () prints the first prompt. */ -Function *rl_startup_hook = (Function *)NULL; - -/* What we use internally. You should always refer to RL_LINE_BUFFER. */ -static char *the_line; - -/* The character that can generate an EOF. Really read from - the terminal driver... just defaulted here. */ -int _rl_eof_char = CTRL ('D'); - -/* Non-zero makes this the next keystroke to read. */ -int rl_pending_input = 0; - -/* Pointer to a useful terminal name. */ -char *rl_terminal_name = (char *)NULL; - -/* Non-zero means to always use horizontal scrolling in line display. */ -int _rl_horizontal_scroll_mode = 0; - -/* Non-zero means to display an asterisk at the starts of history lines - which have been modified. */ -int _rl_mark_modified_lines = 0; - -/* The style of `bell' notification preferred. This can be set to NO_BELL, - AUDIBLE_BELL, or VISIBLE_BELL. */ -int _rl_bell_preference = AUDIBLE_BELL; - -/* Line buffer and maintenence. */ -char *rl_line_buffer = (char *)NULL; -int rl_line_buffer_len = 0; -#define DEFAULT_BUFFER_SIZE 256 - -/* Forward declarations used by the display and termcap code. */ -int term_xn; -int screenwidth, screenheight, screenchars; - - -/* **************************************************************** */ -/* */ -/* `Forward' declarations */ -/* */ -/* **************************************************************** */ - -/* Non-zero means do not parse any lines other than comments and - parser directives. */ -unsigned char _rl_parsing_conditionalized_out = 0; - -/* Non-zero means to save keys that we dispatch on in a kbd macro. */ -static int defining_kbd_macro = 0; - -/* Non-zero means to convert characters with the meta bit set to - escape-prefixed characters so we can indirect through - emacs_meta_keymap or vi_escape_keymap. */ -int _rl_convert_meta_chars_to_ascii = 1; - -/* Non-zero means to output characters with the meta bit set directly - rather than as a meta-prefixed escape sequence. */ -int _rl_output_meta_chars = 0; - -/* Non-zero tells rl_delete_text and rl_insert_text to not add to - the undo list. */ -static int doing_an_undo = 0; - -/* **************************************************************** */ -/* */ -/* Top Level Functions */ -/* */ -/* **************************************************************** */ - -/* Non-zero means treat 0200 bit in terminal input as Meta bit. */ -int _rl_meta_flag = 0; /* Forward declaration */ - -/* Read a line of input. Prompt with PROMPT. A NULL PROMPT means - none. A return value of NULL means that EOF was encountered. */ -char * -readline (prompt) - char *prompt; -{ - char *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_visible_prompt_length = rl_expand_prompt (rl_prompt); - - rl_initialize (); - rl_prep_terminal (_rl_meta_flag); - -#if defined (HANDLE_SIGNALS) - rl_set_signals (); -#endif - - value = readline_internal (); - rl_deprep_terminal (); - -#if defined (HANDLE_SIGNALS) - rl_clear_signals (); -#endif - - return (value); -} - -/* Read a line of input from the global rl_instream, doing output on - the global rl_outstream. - If rl_prompt is non-null, then that is our prompt. */ -static char * -readline_internal () -{ - int lastc, c, eof_found; - - in_stream = rl_instream; - out_stream = rl_outstream; - - lastc = -1; - eof_found = 0; - - if (rl_startup_hook) - (*rl_startup_hook) (); - - if (!readline_echoing_p) - { - if (rl_prompt) - { - fprintf (out_stream, "%s", rl_prompt); - fflush (out_stream); - } - } - else - { - rl_on_new_line (); - rl_redisplay (); -#if defined (VI_MODE) - if (rl_editing_mode == vi_mode) - rl_vi_insertion_mode (); -#endif /* VI_MODE */ - } - - while (!rl_done) - { - int lk = last_command_was_kill; - int code; - - code = setjmp (readline_top_level); - - if (code) - rl_redisplay (); - - if (!rl_pending_input) - { - /* Then initialize the argument and number of keys read. */ - rl_init_argument (); - rl_key_sequence_length = 0; - } - - c = rl_read_key (); - - /* EOF typed to a non-blank line is a <NL>. */ - if (c == EOF && rl_end) - c = NEWLINE; - - /* The character _rl_eof_char typed to blank line, and not as the - previous character is interpreted as EOF. */ - if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end) - { - eof_found = 1; - break; - } - - lastc = c; - _rl_dispatch (c, _rl_keymap); - - /* If there was no change in last_command_was_kill, then no kill - has taken place. Note that if input is pending we are reading - a prefix command, so nothing has changed yet. */ - if (!rl_pending_input) - { - if (lk == last_command_was_kill) - last_command_was_kill = 0; - } - -#if defined (VI_MODE) - /* In vi mode, when you exit insert mode, the cursor moves back - over the previous character. We explicitly check for that here. */ - if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap) - rl_vi_check (); -#endif /* VI_MODE */ - - if (!rl_done) - rl_redisplay (); - } - - /* Restore the original of this history line, iff the line that we - are editing was originally in the history, AND the line has changed. */ - { - HIST_ENTRY *entry = current_history (); - - if (entry && rl_undo_list) - { - char *temp = savestring (the_line); - rl_revert_line (); - entry = replace_history_entry (where_history (), the_line, - (HIST_ENTRY *)NULL); - _rl_free_history_entry (entry); - - strcpy (the_line, temp); - free (temp); - } - } - - /* At any rate, it is highly likely that this line has an undo list. Get - rid of it now. */ - if (rl_undo_list) - free_undo_list (); - - if (eof_found) - return (char *)NULL; - else - return (savestring (the_line)); -} - -/* **************************************************************** */ -/* */ -/* Character Input Buffering */ -/* */ -/* **************************************************************** */ - -static int pop_index = 0, push_index = 0, ibuffer_len = 511; -static unsigned char ibuffer[512]; - -/* Non-null means it is a pointer to a function to run while waiting for - character input. */ -Function *rl_event_hook = (Function *)NULL; - -#define any_typein (push_index != pop_index) - -/* Add KEY to the buffer of characters to be read. */ -rl_stuff_char (key) - int key; -{ - if (key == EOF) - { - key = NEWLINE; - rl_pending_input = EOF; - } - ibuffer[push_index++] = key; - if (push_index >= ibuffer_len) - push_index = 0; - return push_index; -} - -/* Return the amount of space available in the - buffer for stuffing characters. */ -int -ibuffer_space () -{ - if (pop_index > push_index) - return (pop_index - push_index); - else - return (ibuffer_len - (push_index - pop_index)); -} - -/* Get a key from the buffer of characters to be read. - Return the key in KEY. - Result is KEY if there was a key, or 0 if there wasn't. */ -int -rl_get_char (key) - int *key; -{ - if (push_index == pop_index) - return (0); - - *key = ibuffer[pop_index++]; - - if (pop_index >= ibuffer_len) - pop_index = 0; - - return (1); -} - -/* Stuff KEY into the *front* of the input buffer. - Returns non-zero if successful, zero if there is - no space left in the buffer. */ -int -rl_unget_char (key) - int key; -{ - if (ibuffer_space ()) - { - pop_index--; - if (pop_index < 0) - pop_index = ibuffer_len - 1; - ibuffer[pop_index] = key; - return (1); - } - return (0); -} - -/* If a character is available to be read, then read it - and stuff it into IBUFFER. Otherwise, just return. */ -void -rl_gather_tyi () -{ -#if defined (__GO32__) - char input; - - if (isatty (0)) - { - int i = rl_getc (); - - if (i != EOF) - rl_stuff_char (i); - } - else if (kbhit () && ibuffer_space ()) - rl_stuff_char (getkey ()); -#else /* !__GO32__ */ - - int tty = fileno (in_stream); - register int tem, result = -1; - int chars_avail; - char input; - -#if defined (FIONREAD) - result = ioctl (tty, FIONREAD, &chars_avail); -#endif - -#if defined (O_NDELAY) - if (result == -1) - { - int flags; - - flags = fcntl (tty, F_GETFL, 0); - - fcntl (tty, F_SETFL, (flags | O_NDELAY)); - chars_avail = read (tty, &input, 1); - - fcntl (tty, F_SETFL, flags); - if (chars_avail == -1 && errno == EAGAIN) - return; - } -#endif /* O_NDELAY */ - - /* If there's nothing available, don't waste time trying to read - something. */ - if (chars_avail == 0) - return; - - tem = ibuffer_space (); - - if (chars_avail > tem) - chars_avail = tem; - - /* One cannot read all of the available input. I can only read a single - character at a time, or else programs which require input can be - thwarted. If the buffer is larger than one character, I lose. - Damn! */ - if (tem < ibuffer_len) - chars_avail = 0; - - if (result != -1) - { - while (chars_avail--) - rl_stuff_char (rl_getc (in_stream)); - } - else - { - if (chars_avail) - rl_stuff_char (input); - } -#endif /* !__GO32__ */ -} - -static int next_macro_key (); -/* Read a key, including pending input. */ -int -rl_read_key () -{ - int c; - - rl_key_sequence_length++; - - if (rl_pending_input) - { - c = rl_pending_input; - rl_pending_input = 0; - } - else - { - /* If input is coming from a macro, then use that. */ - if (c = next_macro_key ()) - return (c); - - /* If the user has an event function, then call it periodically. */ - if (rl_event_hook) - { - while (rl_event_hook && !rl_get_char (&c)) - { - (*rl_event_hook) (); - rl_gather_tyi (); - } - } - else - { - if (!rl_get_char (&c)) - c = rl_getc (in_stream); - } - } - - return (c); -} - -/* Found later in this file. */ -static void add_macro_char (), with_macro_input (); - -/* Do the command associated with KEY in MAP. - If the associated command is really a keymap, then read - another key, and dispatch into that map. */ -int -_rl_dispatch (key, map) - register int key; - Keymap map; -{ - int r = 0; - - if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii) - { - if (map[ESC].type == ISKMAP) - { - if (defining_kbd_macro) - add_macro_char (ESC); - map = FUNCTION_TO_KEYMAP (map, ESC); - key = UNMETA (key); - rl_key_sequence_length += 2; - return (_rl_dispatch (key, map)); - } - else - ding (); - return 0; - } - - if (defining_kbd_macro) - add_macro_char (key); - - 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) - return (_rl_dispatch (to_lower (key), map)); - - r = (*map[key].function)(rl_numeric_arg * rl_arg_sign, key); - - /* If we have input pending, then the last command was a prefix - command. Don't change the state of rl_last_func. Otherwise, - remember the last command executed in this variable. */ - if (!rl_pending_input) - rl_last_func = map[key].function; - } - else - { - rl_abort (); - return -1; - } - } - break; - - case ISKMAP: - if (map[key].function != (Function *)NULL) - { - int newkey; - - rl_key_sequence_length++; - newkey = rl_read_key (); - r = _rl_dispatch (newkey, FUNCTION_TO_KEYMAP (map, key)); - } - else - { - rl_abort (); - return -1; - } - break; - - case ISMACR: - if (map[key].function != (Function *)NULL) - { - char *macro; - - macro = savestring ((char *)map[key].function); - with_macro_input (macro); - return 0; - } - break; - } -#if defined (VI_MODE) - if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap && - rl_vi_textmod_command (key)) - _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign); -#endif - return (r); -} - - -/* **************************************************************** */ -/* */ -/* 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 sindex; -}; - -/* The list of saved macros. */ -struct saved_macro *macro_list = (struct saved_macro *)NULL; - -/* Forward declarations of static functions. Thank you C. */ -static void push_executing_macro (), pop_executing_macro (); - -/* This one has to be declared earlier in the file. */ -/* static void add_macro_char (); */ - -/* Set up to read subsequent input from STRING. - STRING is free ()'ed when we are done with it. */ -static void -with_macro_input (string) - char *string; -{ - push_executing_macro (); - executing_macro = string; - executing_macro_index = 0; -} - -/* Return the next character available from a macro, or 0 if - there are no macro characters. */ -static int -next_macro_key () -{ - if (!executing_macro) - return (0); - - if (!executing_macro[executing_macro_index]) - { - pop_executing_macro (); - return (next_macro_key ()); - } - - return (executing_macro[executing_macro_index++]); -} - -/* Save the currently executing macro on a stack of saved macros. */ -static void -push_executing_macro () -{ - struct saved_macro *saver; - - saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro)); - saver->next = macro_list; - saver->sindex = 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->sindex; - 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 = xmalloc (current_macro_size = 25); - else - current_macro = 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 (); - return -1; - } - - if (rl_explicit_arg) - { - if (current_macro) - with_macro_input (savestring (current_macro)); - } - else - current_macro_index = 0; - - defining_kbd_macro = 1; - return 0; -} - -/* 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 (); - return -1; - } - - current_macro_index -= (rl_key_sequence_length - 1); - current_macro[current_macro_index] = '\0'; - - defining_kbd_macro = 0; - - return (rl_call_last_kbd_macro (--count, 0)); -} - -/* Execute the most recently defined keyboard macro. - COUNT says how many times to execute it. */ -rl_call_last_kbd_macro (count, ignore) - int count, ignore; -{ - if (!current_macro) - rl_abort (); - - if (defining_kbd_macro) - { - ding (); /* no recursive macros */ - current_macro[--current_macro_index] = '\0'; /* erase this char */ - return 0; - } - - while (count--) - with_macro_input (savestring (current_macro)); - return 0; -} - -void -_rl_kill_kbd_macro () -{ - if (current_macro) - { - free (current_macro); - current_macro = (char *) NULL; - } - current_macro_size = current_macro_index = 0; - - if (executing_macro) - { - free (executing_macro); - executing_macro = (char *) NULL; - } - executing_macro_index = 0; - - defining_kbd_macro = 0; -} - -/* **************************************************************** */ -/* */ -/* Initializations */ -/* */ -/* **************************************************************** */ - -/* Initliaze readline (and terminal if not already). */ -rl_initialize () -{ - /* If we have never been called before, initialize the - terminal and data structures. */ - if (!rl_initialized) - { - readline_initialize_everything (); - rl_initialized++; - } - - /* Initalize the current line information. */ - rl_point = rl_end = 0; - the_line = rl_line_buffer; - the_line[0] = 0; - - /* We aren't done yet. We haven't even gotten started yet! */ - rl_done = 0; - - /* Tell the history routines what is going on. */ - start_using_history (); - - /* Make the display buffer match the state of the line. */ - rl_reset_line_state (); - - /* No such function typed yet. */ - rl_last_func = (Function *)NULL; - - /* Parsing of key-bindings begins in an enabled state. */ - _rl_parsing_conditionalized_out = 0; - - return 0; -} - -/* Initialize the entire state of the world. */ -static void -readline_initialize_everything () -{ - char *t, *t1; - - /* Find out if we are running in Emacs. */ - running_in_emacs = getenv ("EMACS") != (char *)0; - - /* Set up input and output if they are not already set up. */ - if (!rl_instream) - rl_instream = stdin; - - if (!rl_outstream) - rl_outstream = stdout; - - /* Bind in_stream and out_stream immediately. These values may change, - but they may also be used before readline_internal () is called. */ - in_stream = rl_instream; - out_stream = rl_outstream; - - /* Allocate data structures. */ - if (!rl_line_buffer) - rl_line_buffer = xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE); - - /* Initialize the terminal interface. */ - init_terminal_io ((char *)NULL); - -#if !defined (__GO32__) - /* Bind tty characters to readline functions. */ - readline_default_bindings (); -#endif /* !__GO32__ */ - - /* Initialize the function names. */ - rl_initialize_funmap (); - - /* Check for LC_CTYPE and use its value to decide the defaults for - 8-bit character input and output. */ - t = getenv ("LC_CTYPE"); - t1 = getenv ("LANG"); - if (t && (strstr (t, "8859-1") != NULL || strstr (t, "8859_1") != NULL || - strstr (t, "KOI8-R") != NULL || strstr (t, "koi8-r") != NULL) || - t1 && (strstr (t1, "8859-1") != NULL || strstr (t1, "8859_1") != NULL || - strstr (t1, "KOI8-R") != NULL || strstr (t1, "koi8-r") != NULL)) - { - _rl_meta_flag = 1; - _rl_convert_meta_chars_to_ascii = 0; - _rl_output_meta_chars = 1; - } - - /* Read in the init file. */ - rl_read_init_file ((char *)NULL); - - /* XXX */ - if (_rl_horizontal_scroll_mode && term_xn) - { - screenwidth--; - screenchars -= screenheight; - } - - /* Override the effect of any `set keymap' assignments in the - inputrc file. */ - rl_set_keymap_from_edit_mode (); - - /* Try to bind a common arrow key prefix, if not already bound. */ - bind_arrow_keys (); - - /* If the completion parser's default word break characters haven't - been set yet, then do so now. */ - if (rl_completer_word_break_characters == (char *)NULL) - rl_completer_word_break_characters = rl_basic_word_break_characters; -} - -/* If this system allows us to look at the values of the regular - input editing characters, then bind them to their readline - equivalents, iff the characters are not bound to keymaps. */ -static void -readline_default_bindings () -{ - rltty_set_default_bindings (_rl_keymap); -} - -static void -bind_arrow_keys_internal () -{ - Function *f; - - f = rl_function_of_keyseq ("\033[A", _rl_keymap, (int *)NULL); - if (!f || f == rl_do_lowercase_version) - { - _rl_bind_if_unbound ("\033[A", rl_get_previous_history); - _rl_bind_if_unbound ("\033[B", rl_get_next_history); - _rl_bind_if_unbound ("\033[C", rl_forward); - _rl_bind_if_unbound ("\033[D", rl_backward); - } - - f = rl_function_of_keyseq ("\033OA", _rl_keymap, (int *)NULL); - if (!f || f == rl_do_lowercase_version) - { - _rl_bind_if_unbound ("\033OA", rl_get_previous_history); - _rl_bind_if_unbound ("\033OB", rl_get_next_history); - _rl_bind_if_unbound ("\033OC", rl_forward); - _rl_bind_if_unbound ("\033OD", rl_backward); - } -} - -/* Try and bind the common arrow key prefix after giving termcap and - the inputrc file a chance to bind them and create `real' keymaps - for the arrow key prefix. */ -static void -bind_arrow_keys () -{ - Keymap xkeymap; - - xkeymap = _rl_keymap; - - _rl_keymap = emacs_standard_keymap; - bind_arrow_keys_internal (); - -#if defined (VI_MODE) - _rl_keymap = vi_movement_keymap; - bind_arrow_keys_internal (); -#endif - - _rl_keymap = xkeymap; -} - - -/* **************************************************************** */ -/* */ -/* Numeric Arguments */ -/* */ -/* **************************************************************** */ - -/* Handle C-u style numeric args, as well as M--, and M-digits. */ -static int -rl_digit_loop () -{ - int key, c; - - while (1) - { - rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg); - key = c = rl_read_key (); - - if (_rl_keymap[c].type == ISFUNC && - _rl_keymap[c].function == rl_universal_argument) - { - rl_numeric_arg *= 4; - continue; - } - c = UNMETA (c); - if (digit_p (c)) - { - if (rl_explicit_arg) - rl_numeric_arg = (rl_numeric_arg * 10) + (c - '0'); - else - rl_numeric_arg = (c - '0'); - rl_explicit_arg = 1; - } - else - { - if (c == '-' && !rl_explicit_arg) - { - rl_numeric_arg = 1; - rl_arg_sign = -1; - } - else - { - rl_clear_message (); - return (_rl_dispatch (key, _rl_keymap)); - } - } - } - return 0; -} - -/* Add the current digit to the argument in progress. */ -rl_digit_argument (ignore, key) - int ignore, key; -{ - rl_pending_input = key; - return (rl_digit_loop ()); -} - -/* What to do when you abort reading an argument. */ -rl_discard_argument () -{ - ding (); - rl_clear_message (); - rl_init_argument (); - return 0; -} - -/* Create a default argument. */ -rl_init_argument () -{ - rl_numeric_arg = rl_arg_sign = 1; - rl_explicit_arg = 0; - return 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; - return (rl_digit_loop ()); -} - -/* **************************************************************** */ -/* */ -/* Terminal and Termcap */ -/* */ -/* **************************************************************** */ - -static char *term_buffer = (char *)NULL; -static char *term_string_buffer = (char *)NULL; - -static int tcap_initialized = 0; - -/* Non-zero means this terminal can't really do anything. */ -int dumb_term = 0; -/* On Solaris2, sys/types.h #includes sys/reg.h, which #defines PC. - Unfortunately, PC is a global variable used by the termcap library. */ -#undef PC - -#if !defined (__linux__) -/* If this causes problems, add back the `extern'. */ -/*extern*/ char PC, *BC, *UP; -#endif /* __linux__ */ - -/* Some strings to control terminal actions. These are output by tputs (). */ -char *term_goto, *term_clreol, *term_cr, *term_clrpag, *term_backspace; -char *term_pc; - -/* Non-zero if we determine that the terminal can do character insertion. */ -int terminal_can_insert = 0; - -/* How to insert characters. */ -char *term_im, *term_ei, *term_ic, *term_ip, *term_IC; - -/* How to delete characters. */ -char *term_dc, *term_DC; - -#if defined (HACK_TERMCAP_MOTION) -char *term_forward_char; -#endif /* HACK_TERMCAP_MOTION */ - -/* How to go up a line. */ -char *term_up; - -/* A visible bell, if the terminal can be made to flash the screen. */ -char *visible_bell; - -/* Non-zero means that this terminal has a meta key. */ -int term_has_meta; - -/* The string to write to turn on the meta key, if this term has one. */ -char *term_mm; - -/* The string to write to turn off the meta key, if this term has one. */ -char *term_mo; - -/* The key sequences output by the arrow keys, if this terminal has any. */ -char *term_ku, *term_kd, *term_kr, *term_kl; - -/* How to initialize and reset the arrow keys, if this terminal has any. */ -char *term_ks, *term_ke; - -/* 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); - return 0; -} - -/* Set readline's idea of the screen size. TTY is a file descriptor open - to the terminal. If IGNORE_ENV is true, we do not pay attention to the - values of $LINES and $COLUMNS. The tests for TERM_STRING_BUFFER being - non-null serve to check whether or not we have initialized termcap. */ -void -_rl_set_screen_size (tty, ignore_env) - int tty, ignore_env; -{ -#if defined (TIOCGWINSZ) - struct winsize window_size; -#endif /* TIOCGWINSZ */ - -#if defined (TIOCGWINSZ) - if (ioctl (tty, TIOCGWINSZ, &window_size) == 0) - { - screenwidth = (int) window_size.ws_col; - screenheight = (int) window_size.ws_row; - } -#endif /* TIOCGWINSZ */ - - /* Environment variable COLUMNS overrides setting of "co" if IGNORE_ENV - is unset. */ - if (screenwidth <= 0) - { - char *sw; - - if (!ignore_env && (sw = getenv ("COLUMNS"))) - screenwidth = atoi (sw); - - if (screenwidth <= 0 && term_string_buffer) - screenwidth = tgetnum ("co"); - } - - /* Environment variable LINES overrides setting of "li" if IGNORE_ENV - is unset. */ - if (screenheight <= 0) - { - char *sh; - - if (!ignore_env && (sh = getenv ("LINES"))) - screenheight = atoi (sh); - - if (screenheight <= 0 && term_string_buffer) - screenheight = tgetnum ("li"); - } - - /* If all else fails, default to 80x24 terminal. */ - if (screenwidth <= 1) - screenwidth = 80; - - if (screenheight <= 0) - screenheight = 24; - -#if defined (SHELL) - /* If we're being compiled as part of bash, set the environment - variables $LINES and $COLUMNS to new values. */ - set_lines_and_columns (screenheight, screenwidth); -#endif - - if (!term_xn) - screenwidth--; - - screenchars = screenwidth * screenheight; -} - -struct _tc_string { - char *tc_var; - char **tc_value; -}; - -/* This should be kept sorted, just in case we decide to change the - search algorithm to something smarter. */ -static struct _tc_string tc_strings[] = -{ - "DC", &term_DC, - "IC", &term_IC, - "ce", &term_clreol, - "cl", &term_clrpag, - "cr", &term_cr, - "dc", &term_dc, - "ei", &term_ei, - "ic", &term_ic, - "im", &term_im, - "kd", &term_kd, - "kl", &term_kl, - "kr", &term_kr, - "ku", &term_ku, - "ks", &term_ks, - "ke", &term_ke, - "le", &term_backspace, - "mm", &term_mm, - "mo", &term_mo, -#if defined (HACK_TERMCAP_MOTION) - "nd", &term_forward_char, -#endif - "pc", &term_pc, - "up", &term_up, - "vb", &visible_bell, -}; - -#define NUM_TC_STRINGS (sizeof (tc_strings) / sizeof (struct _tc_string)) - -/* Read the desired terminal capability strings into BP. The capabilities - are described in the TC_STRINGS table. */ -static void -get_term_capabilities (bp) - char **bp; -{ - register int i; - - for (i = 0; i < NUM_TC_STRINGS; i++) - *(tc_strings[i].tc_value) = tgetstr (tc_strings[i].tc_var, bp); - tcap_initialized = 1; -} - -static int -init_terminal_io (terminal_name) - char *terminal_name; -{ -#if defined (__GO32__) - screenwidth = ScreenCols (); - screenheight = ScreenRows (); - screenchars = screenwidth * screenheight; - term_cr = "\r"; - term_im = term_ei = term_ic = term_IC = (char *)NULL; - term_up = term_dc = term_DC = visible_bell = (char *)NULL; - - /* Does the __GO32__ have a meta key? I don't know. */ - term_has_meta = 0; - term_mm = term_mo = (char *)NULL; - - /* It probably has arrow keys, but I don't know what they are. */ - term_ku = term_kd = term_kr = term_kl = (char *)NULL; - -#if defined (HACK_TERMCAP_MOTION) - term_forward_char = (char *)NULL; -#endif /* HACK_TERMCAP_MOTION */ - terminal_can_insert = term_xn = 0; - return; -#else /* !__GO32__ */ - - char *term, *buffer; - int tty; - Keymap xkeymap; - - term = terminal_name ? terminal_name : getenv ("TERM"); - - if (!term_string_buffer) - term_string_buffer = xmalloc (2048); - - if (!term_buffer) - term_buffer = xmalloc (2048); - - buffer = term_string_buffer; - - term_clrpag = term_cr = term_clreol = (char *)NULL; - - if (!term) - term = "dumb"; - - if (tgetent (term_buffer, term) <= 0) - { - dumb_term = 1; - screenwidth = 79; - screenheight = 24; - screenchars = 79 * 24; - term_cr = "\r"; - term_im = term_ei = term_ic = term_IC = (char *)NULL; - term_up = term_dc = term_DC = visible_bell = (char *)NULL; - term_ku = term_kd = term_kl = term_kr = (char *)NULL; -#if defined (HACK_TERMCAP_MOTION) - term_forward_char = (char *)NULL; -#endif - terminal_can_insert = 0; - return 0; - } - - get_term_capabilities (&buffer); - - /* Set up the variables that the termcap library expects the application - to provide. */ - PC = term_pc ? *term_pc : 0; - BC = term_backspace; - UP = term_up; - - if (!term_cr) - term_cr = "\r"; - - if (rl_instream) - tty = fileno (rl_instream); - else - tty = 0; - - screenwidth = screenheight = 0; - - term_xn = tgetflag ("am") && tgetflag ("xn"); - - _rl_set_screen_size (tty, 0); - - /* "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); - - /* Check to see if this terminal has a meta key and clear the capability - variables if there is none. */ - term_has_meta = (tgetflag ("km") || tgetflag ("MT")); - if (!term_has_meta) - { - term_mm = (char *)NULL; - term_mo = (char *)NULL; - } - - /* Attempt to find and bind the arrow keys. Do not override already - bound keys in an overzealous attempt, however. */ - xkeymap = _rl_keymap; - - _rl_keymap = emacs_standard_keymap; - _rl_bind_if_unbound (term_ku, rl_get_previous_history); - _rl_bind_if_unbound (term_kd, rl_get_next_history); - _rl_bind_if_unbound (term_kr, rl_forward); - _rl_bind_if_unbound (term_kl, rl_backward); - -#if defined (VI_MODE) - _rl_keymap = vi_movement_keymap; - _rl_bind_if_unbound (term_ku, rl_get_previous_history); - _rl_bind_if_unbound (term_kd, rl_get_next_history); - _rl_bind_if_unbound (term_kr, rl_forward); - _rl_bind_if_unbound (term_kl, rl_backward); -#endif /* VI_MODE */ - - _rl_keymap = xkeymap; - -#endif /* !__GO32__ */ - return 0; -} - -char * -rl_get_termcap (cap) - char *cap; -{ - register int i; - - if (tcap_initialized == 0) - return ((char *)NULL); - for (i = 0; i < NUM_TC_STRINGS; i++) - { - if (tc_strings[i].tc_var[0] == cap[0] && strcmp (tc_strings[i].tc_var, cap) == 0) - return *(tc_strings[i].tc_value); - } - return ((char *)NULL); -} - -/* A function for the use of tputs () */ -int -_rl_output_character_function (c) - int c; -{ - return putc (c, out_stream); -} - -/* Write COUNT characters from STRING to the output stream. */ -void -_rl_output_some_chars (string, count) - char *string; - int count; -{ - fwrite (string, 1, count, out_stream); -} - -/* Move the cursor back. */ -backspace (count) - int count; -{ - register int i; - -#if !defined (__GO32__) - if (term_backspace) - for (i = 0; i < count; i++) - tputs (term_backspace, 1, _rl_output_character_function); - else -#endif /* !__GO32__ */ - for (i = 0; i < count; i++) - putc ('\b', out_stream); - return 0; -} - -/* Move to the start of the next line. */ -crlf () -{ -#if defined (NEW_TTY_DRIVER) - tputs (term_cr, 1, _rl_output_character_function); -#endif /* NEW_TTY_DRIVER */ - putc ('\n', out_stream); - return 0; -} - -rl_tty_status (count, key) - int count, key; -{ -#if defined (TIOCSTAT) - ioctl (1, TIOCSTAT, (char *)0); - rl_refresh_line (); -#else - ding (); -#endif - return 0; -} - - -/* **************************************************************** */ -/* */ -/* Utility Functions */ -/* */ -/* **************************************************************** */ - -/* Return 0 if C is not a member of the class of characters that belong - in words, or 1 if it is. */ - -int allow_pathname_alphabetic_chars = 0; -char *pathname_alphabetic_chars = "/-_=~.#$"; - -int -alphabetic (c) - int c; -{ - if (pure_alphabetic (c) || (digit_p (c))) - return (1); - - if (allow_pathname_alphabetic_chars) - return (strchr (pathname_alphabetic_chars, c) != NULL); - else - return (0); -} - -/* Ring the terminal bell. */ -int -ding () -{ - if (readline_echoing_p) - { -#if !defined (__GO32__) - switch (_rl_bell_preference) - { - case NO_BELL: - default: - break; - case VISIBLE_BELL: - if (visible_bell) - { - tputs (visible_bell, 1, _rl_output_character_function); - break; - } - /* FALLTHROUGH */ - case AUDIBLE_BELL: - fprintf (stderr, "\007"); - fflush (stderr); - break; - } -#else /* __GO32__ */ - fprintf (stderr, "\007"); - fflush (stderr); -#endif /* __GO32__ */ - return (0); - } - return (-1); -} - -/* How to abort things. */ -rl_abort (count, key) - int count, key; -{ - ding (); - rl_clear_message (); - rl_init_argument (); - rl_pending_input = 0; - - defining_kbd_macro = 0; - while (executing_macro) - pop_executing_macro (); - - rl_last_func = (Function *)NULL; - longjmp (readline_top_level, 1); -} - -/* Return a copy of the string between FROM and TO. - FROM is inclusive, TO is not. */ -char * -rl_copy_text (from, to) - int from, to; -{ - register int length; - char *copy; - - /* Fix it if the caller is confused. */ - if (from > to) - { - int t = from; - from = to; - to = t; - } - - length = to - from; - copy = xmalloc (1 + length); - strncpy (copy, the_line + from, length); - copy[length] = '\0'; - return (copy); -} - -/* Increase the size of RL_LINE_BUFFER until it has enough space to hold - LEN characters. */ -void -rl_extend_line_buffer (len) - int len; -{ - while (len >= rl_line_buffer_len) - { - rl_line_buffer_len += DEFAULT_BUFFER_SIZE; - rl_line_buffer = xrealloc (rl_line_buffer, rl_line_buffer_len); - } - - the_line = rl_line_buffer; -} - - -/* **************************************************************** */ -/* */ -/* Insert and Delete */ -/* */ -/* **************************************************************** */ - -/* Insert a string of text into the line at point. This is the only - way that you should do insertion. rl_insert () calls this - function. */ -rl_insert_text (string) - char *string; -{ - register int i, l = strlen (string); - - if (rl_end + l >= rl_line_buffer_len) - rl_extend_line_buffer (rl_end + l); - - for (i = rl_end; i >= rl_point; i--) - the_line[i + l] = the_line[i]; - strncpy (the_line + rl_point, string, l); - - /* Remember how to undo this if we aren't undoing something. */ - if (!doing_an_undo) - { - /* If possible and desirable, concatenate the undos. */ - if ((l == 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'; - return l; -} - -/* Delete the string between FROM and TO. FROM is - inclusive, TO is not. */ -rl_delete_text (from, to) - int from, to; -{ - register char *text; - register int diff, i; - - /* Fix it if the caller is confused. */ - if (from > to) - { - int t = from; - from = to; - to = t; - } - - if (to > rl_end) - to = rl_end; - - text = rl_copy_text (from, to); - - /* Some versions of strncpy() can't handle overlapping arguments. */ - diff = to - from; - for (i = from; i < rl_end - diff; i++) - the_line[i] = the_line[i + diff]; - - /* Remember how to undo this delete. */ - if (!doing_an_undo) - rl_add_undo (UNDO_DELETE, from, to, text); - else - free (text); - - rl_end -= diff; - the_line[rl_end] = '\0'; - return (diff); -} - - -/* **************************************************************** */ -/* */ -/* 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, key) - int count, key; -{ - if (count < 0) - rl_backward (-count); - else if (count > 0) - { - int end = rl_point + count; -#if defined (VI_MODE) - int lend = rl_end - (rl_editing_mode == vi_mode); -#else - int lend = rl_end; -#endif - - if (end > lend) - { - rl_point = lend; - ding (); - } - else - rl_point = end; - } - return 0; -} - -/* Move backward COUNT characters. */ -rl_backward (count, key) - int count, key; -{ - if (count < 0) - rl_forward (-count); - else if (count > 0) - { - if (rl_point < count) - { - rl_point = 0; - ding (); - } - else - rl_point -= count; - } - return 0; -} - -/* Move to the beginning of the line. */ -rl_beg_of_line (count, key) - int count, key; -{ - rl_point = 0; - return 0; -} - -/* Move to the end of the line. */ -rl_end_of_line (count, key) - int count, key; -{ - rl_point = rl_end; - return 0; -} - -/* Move forward a word. We do what Emacs does. */ -rl_forward_word (count, key) - int count, key; -{ - int c; - - if (count < 0) - { - rl_backward_word (-count); - return 0; - } - - while (count) - { - if (rl_point == rl_end) - return 0; - - /* If we are not in a word, move forward until we are in one. - Then, move forward until we hit a non-alphabetic character. */ - c = the_line[rl_point]; - if (!alphabetic (c)) - { - while (++rl_point < rl_end) - { - c = the_line[rl_point]; - if (alphabetic (c)) - break; - } - } - if (rl_point == rl_end) - return 0; - while (++rl_point < rl_end) - { - c = the_line[rl_point]; - if (!alphabetic (c)) - break; - } - --count; - } - return 0; -} - -/* Move backward a word. We do what Emacs does. */ -rl_backward_word (count, key) - int count, key; -{ - int c; - - if (count < 0) - { - rl_forward_word (-count); - return 0; - } - - while (count) - { - if (!rl_point) - return 0; - - /* Like rl_forward_word (), except that we look at the characters - just before point. */ - - c = the_line[rl_point - 1]; - if (!alphabetic (c)) - { - while (--rl_point) - { - c = the_line[rl_point - 1]; - if (alphabetic (c)) - break; - } - } - - while (rl_point) - { - c = the_line[rl_point - 1]; - if (!alphabetic (c)) - break; - else - --rl_point; - } - --count; - } - return 0; -} - -/* Clear the current line. Numeric argument to C-l does this. */ -rl_refresh_line () -{ - int curr_line, nleft; - - /* Find out whether or not there might be invisible characters in the - editing buffer. */ - if (rl_display_prompt == rl_prompt) - nleft = _rl_last_c_pos - screenwidth - rl_visible_prompt_length; - else - nleft = _rl_last_c_pos - screenwidth; - - if (nleft > 0) - curr_line = 1 + nleft / screenwidth; - else - curr_line = 0; - - _rl_move_vert (curr_line); - _rl_move_cursor_relative (0, the_line); /* XXX is this right */ - -#if defined (__GO32__) - { - int row, col, width, row_start; - - ScreenGetCursor (&row, &col); - width = ScreenCols (); - row_start = ScreenPrimary + (row * width); - memset (row_start + col, 0, (width - col) * 2); - } -#else /* !__GO32__ */ - if (term_clreol) - tputs (term_clreol, 1, _rl_output_character_function); -#endif /* !__GO32__ */ - - rl_forced_update_display (); - rl_display_fixed = 1; - - return 0; -} - -/* C-l typed to a line without quoting clears the screen, and then reprints - the prompt and the current input line. Given a numeric arg, redraw only - the current line. */ -rl_clear_screen (count, key) - int count, key; -{ - if (rl_explicit_arg) - { - rl_refresh_line (); - return 0; - } - -#if !defined (__GO32__) - if (term_clrpag) - tputs (term_clrpag, 1, _rl_output_character_function); - else -#endif /* !__GO32__ */ - crlf (); - - rl_forced_update_display (); - rl_display_fixed = 1; - - return 0; -} - -rl_arrow_keys (count, c) - int count, c; -{ - int ch; - - ch = rl_read_key (); - - switch (to_upper (ch)) - { - case 'A': - rl_get_previous_history (count); - break; - - case 'B': - rl_get_next_history (count); - break; - - case 'C': - rl_forward (count); - break; - - case 'D': - rl_backward (count); - break; - - default: - ding (); - } - return 0; -} - - -/* **************************************************************** */ -/* */ -/* Text commands */ -/* */ -/* **************************************************************** */ - -/* Insert the character C at the current location, moving point forward. */ -rl_insert (count, c) - int count, c; -{ - register int i; - char *string; - - if (count <= 0) - return 0; - - /* If we can optimize, then do it. But don't let people crash - readline because of extra large arguments. */ - if (count > 1 && count < 1024) - { - string = xmalloc (1 + count); - - for (i = 0; i < count; i++) - string[i] = c; - - string[i] = '\0'; - rl_insert_text (string); - free (string); - - return 0; - } - - if (count > 1024) - { - int decreaser; - char str[1024+1]; - - for (i = 0; i < 1024; i++) - str[i] = c; - - while (count) - { - decreaser = (count > 1024 ? 1024 : count); - str[decreaser] = '\0'; - rl_insert_text (str); - count -= decreaser; - } - - return 0; - } - - /* We are inserting a single character. - If there is pending input, then make a string of all of the - pending characters that are bound to rl_insert, and insert - them all. */ - if (any_typein) - { - int key = 0, t; - - i = 0; - string = xmalloc (ibuffer_len + 1); - string[i++] = c; - - while ((t = rl_get_char (&key)) && - (_rl_keymap[key].type == ISFUNC && - _rl_keymap[key].function == rl_insert)) - string[i++] = key; - - if (t) - rl_unget_char (key); - - string[i] = '\0'; - rl_insert_text (string); - free (string); - } - else - { - /* Inserting a single character. */ - char str[2]; - - str[1] = '\0'; - str[0] = c; - rl_insert_text (str); - } - return 0; -} - -/* Insert the next typed character verbatim. */ -rl_quoted_insert (count, key) - int count, key; -{ - int c; - - c = rl_read_key (); - return (rl_insert (count, c)); -} - -/* Insert a tab character. */ -rl_tab_insert (count, key) - int count, key; -{ - return (rl_insert (count, '\t')); -} - -/* What to do when a NEWLINE is pressed. We accept the whole line. - KEY is the key that invoked this command. I guess it could have - meaning in the future. */ -rl_newline (count, key) - int count, key; -{ - rl_done = 1; - -#if defined (VI_MODE) - _rl_vi_done_inserting (); - _rl_vi_reset_last (); - -#endif /* VI_MODE */ - - if (readline_echoing_p) - _rl_update_final (); - return 0; -} - -rl_clean_up_for_exit () -{ - if (readline_echoing_p) - { - _rl_move_vert (_rl_vis_botlin); - _rl_vis_botlin = 0; - fflush (out_stream); - rl_restart_output (); - } - return 0; -} - -/* What to do for some uppercase characters, like meta characters, - and some characters appearing in emacs_ctlx_keymap. This function - is just a stub, you bind keys to it and the code in _rl_dispatch () - is special cased. */ -rl_do_lowercase_version (ignore1, ignore2) - int ignore1, ignore2; -{ - return 0; -} - -/* Rubout the character behind point. */ -rl_rubout (count, key) - int count, key; -{ - if (count < 0) - { - rl_delete (-count); - return 0; - } - - if (!rl_point) - { - ding (); - return -1; - } - - if (count > 1 || rl_explicit_arg) - { - int orig_point = rl_point; - rl_backward (count); - rl_kill_text (orig_point, rl_point); - } - else - { - int c = the_line[--rl_point]; - rl_delete_text (rl_point, rl_point + 1); - - if (rl_point == rl_end && isprint (c) && _rl_last_c_pos) - { - int l; - l = rl_character_len (c, rl_point); - _rl_erase_at_end_of_line (l); - } - } - return 0; -} - -/* Delete the character under the cursor. Given a numeric argument, - kill that many characters instead. */ -rl_delete (count, invoking_key) - int count, invoking_key; -{ - if (count < 0) - { - return (rl_rubout (-count)); - } - - if (rl_point == rl_end) - { - ding (); - return -1; - } - - if (count > 1 || rl_explicit_arg) - { - int orig_point = rl_point; - rl_forward (count); - rl_kill_text (orig_point, rl_point); - rl_point = orig_point; - return 0; - } - else - return (rl_delete_text (rl_point, rl_point + 1)); - -} - -/* Delete all spaces and tabs around point. */ -rl_delete_horizontal_space (count, ignore) - int count, ignore; -{ - int start = rl_point; - - while (rl_point && whitespace (the_line[rl_point - 1])) - rl_point--; - - start = rl_point; - - while (rl_point < rl_end && whitespace (the_line[rl_point])) - rl_point++; - - if (start != rl_point) - { - rl_delete_text (start, rl_point); - rl_point = start; - } - return 0; -} - - -/* **************************************************************** */ -/* */ -/* Kill commands */ -/* */ -/* **************************************************************** */ - -/* The next two functions mimic unix line editing behaviour, except they - save the deleted text on the kill ring. This is safer than not saving - it, and since we have a ring, nobody should get screwed. */ - -/* This does what C-w does in Unix. We can't prevent people from - using behaviour that they expect. */ -rl_unix_word_rubout (count, key) - int count, key; -{ - if (!rl_point) - ding (); - else - { - int orig_point = rl_point; - if (count <= 0) - count = 1; - - while (count--) - { - 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 (orig_point, rl_point); - } - return 0; -} - -/* Here is C-u doing what Unix does. You don't *have* to use these - key-bindings. We have a choice of killing the entire line, or - killing from where we are to the start of the line. We choose the - latter, because if you are a Unix weenie, then you haven't backspaced - into the line at all, and if you aren't, then you know what you are - doing. */ -rl_unix_line_discard (count, key) - int count, key; -{ - if (!rl_point) - ding (); - else - { - rl_kill_text (rl_point, 0); - rl_point = 0; - } - return 0; -} - - -/* **************************************************************** */ -/* */ -/* Commands For Typos */ -/* */ -/* **************************************************************** */ - -/* Random and interesting things in here. */ - -/* **************************************************************** */ -/* */ -/* Changing Case */ -/* */ -/* **************************************************************** */ - -/* The three kinds of things that we know how to do. */ -#define UpCase 1 -#define DownCase 2 -#define CapCase 3 - -static int rl_change_case (); - -/* Uppercase the word at point. */ -rl_upcase_word (count, key) - int count, key; -{ - return (rl_change_case (count, UpCase)); -} - -/* Lowercase the word at point. */ -rl_downcase_word (count, key) - int count, key; -{ - return (rl_change_case (count, DownCase)); -} - -/* Upcase the first letter, downcase the rest. */ -rl_capitalize_word (count, key) - int count, key; -{ - return (rl_change_case (count, CapCase)); -} - -/* The meaty function. - Change the case of COUNT words, performing OP on them. - OP is one of UpCase, DownCase, or CapCase. - If a negative argument is given, leave point where it started, - otherwise, leave it where it moves to. */ -static int -rl_change_case (count, op) - int count, op; -{ - register int start = rl_point, end; - int state = 0; - - rl_forward_word (count); - end = rl_point; - - if (count < 0) - { - int temp = start; - start = end; - end = temp; - } - - /* We are going to modify some text, so let's prepare to undo it. */ - rl_modifying (start, end); - - for (; start < end; start++) - { - switch (op) - { - case UpCase: - the_line[start] = to_upper (the_line[start]); - break; - - case DownCase: - the_line[start] = to_lower (the_line[start]); - break; - - case CapCase: - if (state == 0) - { - the_line[start] = to_upper (the_line[start]); - state = 1; - } - else - { - the_line[start] = to_lower (the_line[start]); - } - if (!pure_alphabetic (the_line[start])) - state = 0; - break; - - default: - ding (); - return -1; - } - } - rl_point = end; - return 0; -} - -/* **************************************************************** */ -/* */ -/* Transposition */ -/* */ -/* **************************************************************** */ - -/* Transpose the words at point. */ -rl_transpose_words (count, key) - int count, key; -{ - char *word1, *word2; - int w1_beg, w1_end, w2_beg, w2_end; - int orig_point = rl_point; - - if (!count) - return 0; - - /* Find the two words. */ - rl_forward_word (count); - w2_end = rl_point; - rl_backward_word (1); - w2_beg = rl_point; - rl_backward_word (count); - w1_beg = rl_point; - rl_forward_word (1); - w1_end = rl_point; - - /* Do some check to make sure that there really are two words. */ - if ((w1_beg == w2_beg) || (w2_beg < w1_end)) - { - ding (); - rl_point = orig_point; - return -1; - } - - /* Get the text of the words. */ - word1 = rl_copy_text (w1_beg, w1_end); - word2 = rl_copy_text (w2_beg, w2_end); - - /* We are about to do many insertions and deletions. Remember them - as one operation. */ - rl_begin_undo_group (); - - /* Do the stuff at word2 first, so that we don't have to worry - about word1 moving. */ - rl_point = w2_beg; - rl_delete_text (w2_beg, w2_end); - rl_insert_text (word1); - - rl_point = w1_beg; - rl_delete_text (w1_beg, w1_end); - rl_insert_text (word2); - - /* This is exactly correct since the text before this point has not - changed in length. */ - rl_point = w2_end; - - /* I think that does it. */ - rl_end_undo_group (); - free (word1); - free (word2); - - return 0; -} - -/* Transpose the characters at point. If point is at the end of the line, - then transpose the characters before point. */ -rl_transpose_chars (count, key) - int count, key; -{ - char dummy[2]; - - if (!count) - return 0; - - if (!rl_point || rl_end < 2) - { - ding (); - return -1; - } - - rl_begin_undo_group (); - - if (rl_point == rl_end) - { - --rl_point; - count = 1; - } - rl_point--; - - dummy[0] = the_line[rl_point]; - dummy[1] = '\0'; - - rl_delete_text (rl_point, rl_point + 1); - - rl_point += count; - if (rl_point > rl_end) - rl_point = rl_end; - else if (rl_point < 0) - rl_point = 0; - rl_insert_text (dummy); - - rl_end_undo_group (); - return 0; -} - -/* **************************************************************** */ -/* */ -/* Undo, and Undoing */ -/* */ -/* **************************************************************** */ - -/* The current undo list for THE_LINE. */ -UNDO_LIST *rl_undo_list = (UNDO_LIST *)NULL; - -/* Remember how to undo something. Concatenate some undos if that - seems right. */ -void -rl_add_undo (what, start, end, text) - enum undo_code what; - int start, end; - char *text; -{ - UNDO_LIST *temp = (UNDO_LIST *)xmalloc (sizeof (UNDO_LIST)); - temp->what = what; - temp->start = start; - temp->end = end; - temp->text = text; - temp->next = rl_undo_list; - rl_undo_list = temp; -} - -/* Free the existing undo list. */ -void -free_undo_list () -{ - while (rl_undo_list) - { - UNDO_LIST *release = rl_undo_list; - rl_undo_list = rl_undo_list->next; - - if (release->what == UNDO_DELETE) - free (release->text); - - free (release); - } - rl_undo_list = (UNDO_LIST *)NULL; -} - -/* Undo the next thing in the list. Return 0 if there - is nothing to undo, or non-zero if there was. */ -int -rl_do_undo () -{ - UNDO_LIST *release; - int waiting_for_begin = 0; - -undo_thing: - if (!rl_undo_list) - return (0); - - doing_an_undo = 1; - - switch (rl_undo_list->what) { - - /* Undoing deletes means inserting some text. */ - case UNDO_DELETE: - rl_point = rl_undo_list->start; - rl_insert_text (rl_undo_list->text); - free (rl_undo_list->text); - break; - - /* Undoing inserts means deleting some text. */ - case UNDO_INSERT: - rl_delete_text (rl_undo_list->start, rl_undo_list->end); - rl_point = rl_undo_list->start; - break; - - /* Undoing an END means undoing everything 'til we get to - a BEGIN. */ - case UNDO_END: - waiting_for_begin++; - break; - - /* Undoing a BEGIN means that we are done with this group. */ - case UNDO_BEGIN: - if (waiting_for_begin) - waiting_for_begin--; - else - ding (); - 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. */ -int -rl_begin_undo_group () -{ - rl_add_undo (UNDO_BEGIN, 0, 0, 0); - return 0; -} - -/* End an undo group started with rl_begin_undo_group (). */ -int -rl_end_undo_group () -{ - rl_add_undo (UNDO_END, 0, 0, 0); - return 0; -} - -/* Save an undo entry for the text from START to END. */ -rl_modifying (start, end) - int start, end; -{ - if (start > end) - { - int t = start; - start = end; - end = t; - } - - if (start != end) - { - char *temp = rl_copy_text (start, end); - rl_begin_undo_group (); - rl_add_undo (UNDO_DELETE, start, end, temp); - rl_add_undo (UNDO_INSERT, start, end, (char *)NULL); - rl_end_undo_group (); - } - return 0; -} - -/* Revert the current line to its previous state. */ -int -rl_revert_line (count, key) - int count, key; -{ - if (!rl_undo_list) - ding (); - else - { - while (rl_undo_list) - rl_do_undo (); - } - return 0; -} - -/* Do some undoing of things that were done. */ -int -rl_undo_command (count, key) - int count, key; -{ - if (count < 0) - return 0; /* Nothing to do. */ - - while (count) - { - if (rl_do_undo ()) - count--; - else - { - ding (); - break; - } - } - return 0; -} - -/* **************************************************************** */ -/* */ -/* History Utilities */ -/* */ -/* **************************************************************** */ - -/* We already have a history library, and that is what we use to control - the history features of readline. However, this is our local interface - to the history mechanism. */ - -/* While we are editing the history, this is the saved - version of the original line. */ -HIST_ENTRY *saved_line_for_history = (HIST_ENTRY *)NULL; - -/* Set the history pointer back to the last entry in the history. */ -static void -start_using_history () -{ - using_history (); - if (saved_line_for_history) - _rl_free_history_entry (saved_line_for_history); - - saved_line_for_history = (HIST_ENTRY *)NULL; -} - -/* Free the contents (and containing structure) of a HIST_ENTRY. */ -void -_rl_free_history_entry (entry) - HIST_ENTRY *entry; -{ - if (!entry) - return; - if (entry->line) - free (entry->line); - free (entry); -} - -/* Perhaps put back the current line if it has changed. */ -maybe_replace_line () -{ - HIST_ENTRY *temp = current_history (); - - /* If the current line has changed, save the changes. */ - if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list)) - { - temp = replace_history_entry (where_history (), the_line, rl_undo_list); - free (temp->line); - free (temp); - } - return 0; -} - -/* Put back the saved_line_for_history if there is one. */ -maybe_unsave_line () -{ - if (saved_line_for_history) - { - int line_len; - - line_len = strlen (saved_line_for_history->line); - - if (line_len >= rl_line_buffer_len) - rl_extend_line_buffer (line_len); - - strcpy (the_line, saved_line_for_history->line); - rl_undo_list = (UNDO_LIST *)saved_line_for_history->data; - _rl_free_history_entry (saved_line_for_history); - saved_line_for_history = (HIST_ENTRY *)NULL; - rl_end = rl_point = strlen (the_line); - } - else - ding (); - return 0; -} - -/* Save the current line in saved_line_for_history. */ -maybe_save_line () -{ - if (!saved_line_for_history) - { - saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY)); - saved_line_for_history->line = savestring (the_line); - saved_line_for_history->data = (char *)rl_undo_list; - } - return 0; -} - -/* **************************************************************** */ -/* */ -/* History Commands */ -/* */ -/* **************************************************************** */ - -/* Meta-< goes to the start of the history. */ -rl_beginning_of_history (count, key) - int count, key; -{ - return (rl_get_previous_history (1 + where_history ())); -} - -/* Meta-> goes to the end of the history. (The current line). */ -rl_end_of_history (count, key) - int count, key; -{ - maybe_replace_line (); - using_history (); - maybe_unsave_line (); - return 0; -} - -/* Move down to the next history line. */ -rl_get_next_history (count, key) - int count, key; -{ - HIST_ENTRY *temp = (HIST_ENTRY *)NULL; - - if (count < 0) - return (rl_get_previous_history (-count)); - - if (!count) - return 0; - - maybe_replace_line (); - - while (count) - { - temp = next_history (); - if (!temp) - break; - --count; - } - - if (!temp) - maybe_unsave_line (); - else - { - int line_len; - - line_len = strlen (temp->line); - - if (line_len >= rl_line_buffer_len) - rl_extend_line_buffer (line_len); - - strcpy (the_line, temp->line); - rl_undo_list = (UNDO_LIST *)temp->data; - rl_end = rl_point = strlen (the_line); -#if defined (VI_MODE) - if (rl_editing_mode == vi_mode) - rl_point = 0; -#endif /* VI_MODE */ - } - return 0; -} - -/* Get the previous item out of our interactive history, making it the current - line. If there is no previous history, just ding. */ -rl_get_previous_history (count, key) - int count, key; -{ - HIST_ENTRY *old_temp = (HIST_ENTRY *)NULL; - HIST_ENTRY *temp = (HIST_ENTRY *)NULL; - - if (count < 0) - return (rl_get_next_history (-count)); - - if (!count) - return 0; - - /* If we don't have a line saved, then save this one. */ - maybe_save_line (); - - /* If the current line has changed, save the changes. */ - maybe_replace_line (); - - while (count) - { - temp = previous_history (); - if (!temp) - break; - else - old_temp = temp; - --count; - } - - /* If there was a large argument, and we moved back to the start of the - history, that is not an error. So use the last value found. */ - if (!temp && old_temp) - temp = old_temp; - - if (!temp) - ding (); - else - { - int line_len; - - line_len = strlen (temp->line); - - if (line_len >= rl_line_buffer_len) - rl_extend_line_buffer (line_len); - - strcpy (the_line, temp->line); - rl_undo_list = (UNDO_LIST *)temp->data; - rl_end = rl_point = line_len; - -#if defined (VI_MODE) - if (rl_editing_mode == vi_mode) - rl_point = 0; -#endif /* VI_MODE */ - } - return 0; -} - -/* Make C be the next command to be executed. */ -rl_execute_next (c) - int c; -{ - rl_pending_input = c; - return 0; -} - -/* **************************************************************** */ -/* */ -/* The Mark and the Region. */ -/* */ -/* **************************************************************** */ - -/* Set the mark at POSITION. */ -rl_set_mark (position) - int position; -{ - if (position > rl_end) - return -1; - - rl_mark = position; - return 0; -} - -/* Exchange the position of mark and point. */ -rl_exchange_mark_and_point (count, key) - int count, key; -{ - if (rl_mark > rl_end) - rl_mark = -1; - - if (rl_mark == -1) - { - ding (); - return -1; - } - else - { - int temp = rl_point; - - rl_point = rl_mark; - rl_mark = temp; - } - return 0; -} - - -/* **************************************************************** */ -/* */ -/* Killing Mechanism */ -/* */ -/* **************************************************************** */ - -/* What we assume for a max number of kills. */ -#define DEFAULT_MAX_KILLS 10 - -/* The real variable to look at to find out when to flush kills. */ -int rl_max_kills = DEFAULT_MAX_KILLS; - -/* Where to store killed text. */ -char **rl_kill_ring = (char **)NULL; - -/* Where we are in the kill ring. */ -int rl_kill_index = 0; - -/* How many slots we have in the kill ring. */ -int rl_kill_ring_length = 0; - -/* How to say that you only want to save a certain amount - of kill material. */ -rl_set_retained_kills (num) - int num; -{ - return 0; -} - -/* The way to kill something. This appends or prepends to the last - kill, if the last command was a kill command. if FROM is less - than TO, then the text is appended, otherwise prepended. If the - last command was not a kill command, then a new slot is made for - this kill. */ -rl_kill_text (from, to) - int from, to; -{ - int slot; - char *text; - - /* Is there anything to kill? */ - if (from == to) - { - last_command_was_kill++; - return 0; - } - - text = rl_copy_text (from, to); - - /* 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 *)); - rl_kill_ring[slot = 0] = (char *)NULL; - } - 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 - { - slot = rl_kill_ring_length += 1; - rl_kill_ring = (char **)xrealloc (rl_kill_ring, slot * sizeof (char *)); - } - rl_kill_ring[--slot] = (char *)NULL; - } - } - else - slot = rl_kill_ring_length - 1; - - /* If the last command was a kill, prepend or append. */ - if (last_command_was_kill && rl_editing_mode != vi_mode) - { - char *old = rl_kill_ring[slot]; - char *new = xmalloc (1 + strlen (old) + strlen (text)); - - if (from < to) - { - strcpy (new, old); - strcat (new, text); - } - else - { - strcpy (new, text); - strcat (new, old); - } - free (old); - free (text); - rl_kill_ring[slot] = new; - } - else - { - rl_kill_ring[slot] = text; - } - rl_kill_index = slot; - last_command_was_kill++; - return 0; -} - -/* Now REMEMBER! In order to do prepending or appending correctly, kill - commands always make rl_point's original position be the FROM argument, - and rl_point's extent be the TO argument. */ - -/* **************************************************************** */ -/* */ -/* Killing Commands */ -/* */ -/* **************************************************************** */ - -/* Delete the word at point, saving the text in the kill ring. */ -rl_kill_word (count, key) - int count, key; -{ - int orig_point = rl_point; - - if (count < 0) - return (rl_backward_kill_word (-count)); - else - { - rl_forward_word (count); - - if (rl_point != orig_point) - rl_kill_text (orig_point, rl_point); - - rl_point = orig_point; - } - return 0; -} - -/* Rubout the word before point, placing it on the kill ring. */ -rl_backward_kill_word (count, ignore) - int count, ignore; -{ - int orig_point = rl_point; - - if (count < 0) - return (rl_kill_word (-count)); - else - { - rl_backward_word (count); - - if (rl_point != orig_point) - rl_kill_text (orig_point, rl_point); - } - return 0; -} - -/* Kill from here to the end of the line. If DIRECTION is negative, kill - back to the line start instead. */ -rl_kill_line (direction, ignore) - int direction, ignore; -{ - int orig_point = rl_point; - - if (direction < 0) - return (rl_backward_kill_line (1)); - else - { - rl_end_of_line (1, ignore); - if (orig_point != rl_point) - rl_kill_text (orig_point, rl_point); - rl_point = orig_point; - } - return 0; -} - -/* Kill backwards to the start of the line. If DIRECTION is negative, kill - forwards to the line end instead. */ -rl_backward_kill_line (direction, ignore) - int direction, ignore; -{ - int orig_point = rl_point; - - if (direction < 0) - return (rl_kill_line (1)); - else - { - if (!rl_point) - ding (); - else - { - rl_beg_of_line (1, ignore); - rl_kill_text (orig_point, rl_point); - } - } - return 0; -} - -/* Kill the whole line, no matter where point is. */ -rl_kill_full_line (count, ignore) - int count, ignore; -{ - rl_begin_undo_group (); - rl_point = 0; - rl_kill_text (rl_point, rl_end); - rl_end_undo_group (); - return 0; -} - -/* Yank back the last killed text. This ignores arguments. */ -rl_yank (count, ignore) - int count, ignore; -{ - if (!rl_kill_ring) - { - rl_abort (count, ignore); - return -1; - } - - rl_set_mark (rl_point); - rl_insert_text (rl_kill_ring[rl_kill_index]); - return 0; -} - -/* If the last command was yank, or yank_pop, and the text just - before point is identical to the current kill item, then - delete that text from the line, rotate the index down, and - yank back some other text. */ -rl_yank_pop (count, key) - int count, key; -{ - int l; - - if (((rl_last_func != rl_yank_pop) && (rl_last_func != rl_yank)) || - !rl_kill_ring) - { - rl_abort (1, key); - return -1; - } - - l = strlen (rl_kill_ring[rl_kill_index]); - if (((rl_point - l) >= 0) && - (strncmp (the_line + (rl_point - l), - rl_kill_ring[rl_kill_index], l) == 0)) - { - rl_delete_text ((rl_point - l), rl_point); - rl_point -= l; - rl_kill_index--; - if (rl_kill_index < 0) - rl_kill_index = rl_kill_ring_length - 1; - rl_yank (1, 0); - return 0; - } - else - { - rl_abort (1, key); - return -1; - } -} - -/* Yank the COUNTth argument from the previous history line. */ -rl_yank_nth_arg (count, ignore) - int count, ignore; -{ - register HIST_ENTRY *entry = previous_history (); - char *arg; - - if (entry) - next_history (); - else - { - ding (); - return -1; - } - - arg = history_arg_extract (count, count, entry->line); - if (!arg || !*arg) - { - ding (); - return -1; - } - - rl_begin_undo_group (); - -#if defined (VI_MODE) - /* Vi mode always inserts a space before yanking the argument, and it - inserts it right *after* rl_point. */ - if (rl_editing_mode == vi_mode) - { - rl_vi_append_mode (); - rl_insert_text (" "); - } -#endif /* VI_MODE */ - - rl_insert_text (arg); - free (arg); - - rl_end_undo_group (); - return 0; -} - -/* Yank the last argument from the previous history line. This `knows' - how rl_yank_nth_arg treats a count of `$'. With an argument, this - behaves the same as rl_yank_nth_arg. */ -int -rl_yank_last_arg (count, key) - int count, key; -{ - if (rl_explicit_arg) - return (rl_yank_nth_arg (count, key)); - else - return (rl_yank_nth_arg ('$', key)); -} - -/* How to toggle back and forth between editing modes. */ -rl_vi_editing_mode (count, key) - int count, key; -{ -#if defined (VI_MODE) - rl_editing_mode = vi_mode; - rl_vi_insertion_mode (); - return 0; -#endif /* VI_MODE */ -} - -rl_emacs_editing_mode (count, key) - int count, key; -{ - rl_editing_mode = emacs_mode; - _rl_keymap = emacs_standard_keymap; - return 0; -} - - -/* **************************************************************** */ -/* */ -/* USG (System V) Support */ -/* */ -/* **************************************************************** */ - -int -rl_getc (stream) - FILE *stream; -{ - int result; - unsigned char c; - -#if defined (__GO32__) - if (isatty (0)) - return (getkey () & 0x7F); -#endif /* __GO32__ */ - - while (1) - { - result = read (fileno (stream), &c, sizeof (unsigned char)); - - if (result == sizeof (unsigned char)) - return (c); - - /* If zero characters are returned, then the file that we are - reading from is empty! Return EOF in that case. */ - if (result == 0) - return (EOF); - -#if defined (EWOULDBLOCK) - if (errno == EWOULDBLOCK) - { - int flags; - - if ((flags = fcntl (fileno (stream), F_GETFL, 0)) < 0) - return (EOF); - if (flags & O_NDELAY) - { - flags &= ~O_NDELAY; - fcntl (fileno (stream), F_SETFL, flags); - continue; - } - continue; - } -#endif /* EWOULDBLOCK */ - -#if defined (_POSIX_VERSION) && defined (EAGAIN) && defined (O_NONBLOCK) - if (errno == EAGAIN) - { - int flags; - - if ((flags = fcntl (fileno (stream), F_GETFL, 0)) < 0) - return (EOF); - if (flags & O_NONBLOCK) - { - flags &= ~O_NONBLOCK; - fcntl (fileno (stream), F_SETFL, flags); - continue; - } - } -#endif /* _POSIX_VERSION && EAGAIN && O_NONBLOCK */ - -#if !defined (__GO32__) - /* If the error that we received was SIGINT, then try again, - this is simply an interrupted system call to read (). - Otherwise, some error ocurred, also signifying EOF. */ - if (errno != EINTR) - return (EOF); -#endif /* !__GO32__ */ - } -} - -#if !defined (SHELL) -/* Backwards compatibilty, now that savestring has been removed from - all `public' readline header files. */ -char * -rl_savestring (s) - char *s; -{ - return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s))); -} -#endif - -/* Function equivalents for the macros defined in chartypes.h. */ -#undef uppercase_p -int -uppercase_p (c) - int c; -{ - return (isupper (c)); -} - -#undef lowercase_p -int -lowercase_p (c) - int c; -{ - return (islower (c)); -} - -#undef pure_alphabetic -int -pure_alphabetic (c) - int c; -{ - return (isupper (c) || islower (c)); -} - -#undef digit_p -int -digit_p (c) - int c; -{ - return (isdigit (c)); -} - -#undef to_lower -int -to_lower (c) - int c; -{ - return (isupper (c) ? tolower (c) : c); -} - -#undef to_upper -int -to_upper (c) - int c; -{ - return (islower (c) ? toupper (c) : c); -} - -#undef digit_value -int -digit_value (c) - int c; -{ - return (isdigit (c) ? c - '0' : c); -} - -#if defined (STATIC_MALLOC) - -/* **************************************************************** */ -/* */ -/* xmalloc and xrealloc () */ -/* */ -/* **************************************************************** */ - -static void memory_error_and_abort (); - -static char * -xmalloc (bytes) - int bytes; -{ - char *temp = (char *)malloc (bytes); - - if (!temp) - memory_error_and_abort (); - return (temp); -} - -static char * -xrealloc (pointer, bytes) - char *pointer; - int bytes; -{ - char *temp; - - if (!pointer) - temp = (char *)malloc (bytes); - else - temp = (char *)realloc (pointer, bytes); - - if (!temp) - memory_error_and_abort (); - - return (temp); -} - -static void -memory_error_and_abort () -{ - fprintf (stderr, "readline: Out of virtual memory!\n"); - abort (); -} -#endif /* STATIC_MALLOC */ - - -/* **************************************************************** */ -/* */ -/* Testing Readline */ -/* */ -/* **************************************************************** */ - -#if defined (TEST) - -main () -{ - HIST_ENTRY **history_list (); - char *temp = (char *)NULL; - char *prompt = "readline% "; - int done = 0; - - while (!done) - { - temp = readline (prompt); - - /* Test for EOF. */ - if (!temp) - exit (1); - - /* If there is anything on the line, print it and remember it. */ - if (*temp) - { - fprintf (stderr, "%s\r\n", temp); - add_history (temp); - } - - /* Check for `command' that we handle. */ - if (strcmp (temp, "quit") == 0) - done = 1; - - if (strcmp (temp, "list") == 0) - { - HIST_ENTRY **list = history_list (); - register int i; - if (list) - { - for (i = 0; list[i]; i++) - { - fprintf (stderr, "%d: %s\r\n", i, list[i]->line); - free (list[i]->line); - } - free (list); - } - } - free (temp); - } -} - -#endif /* TEST */ - - -/* - * Local variables: - * compile-command: "gcc -g -traditional -I. -I.. -DTEST -o readline readline.c keymaps.o funmap.o history.o -ltermcap" - * end: - */ |
