*** /dev/null Sat Nov 23 08:26:05 2024
--- - Sat Nov 23 08:26:06 2024
***************
*** 0 ****
--- 1,1369 ----
+ /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Communicator client code, released
+ * March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is
+ * Simmule Turner and Rich Salz.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+ /*
+ * Copyright 1992,1993 Simmule Turner and Rich Salz. All rights reserved.
+ *
+ * This software is not subject to any license of the American Telephone
+ * and Telegraph Company or of the Regents of the University of California.
+ *
+ * Permission is granted to anyone to use this software for any purpose on
+ * any computer system, and to alter it and redistribute it freely, subject
+ * to the following restrictions:
+ * 1. The authors are not responsible for the consequences of use of this
+ * software, no matter how awful, even if they arise from flaws in it.
+ * 2. The origin of this software must not be misrepresented, either by
+ * explicit claim or by omission. Since few users ever read sources,
+ * credits must appear in the documentation.
+ * 3. Altered versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software. Since few users
+ * ever read sources, credits must appear in the documentation.
+ * 4. This notice may not be removed or altered.
+ */
+
+
+ /*
+ ** Main editing routines for editline library.
+ */
+ #include "editline.h"
+ #include <signal.h>
+ #include <ctype.h>
+
+ /*
+ ** Manifest constants.
+ */
+ #define SCREEN_WIDTH 80
+ #define SCREEN_ROWS 24
+ #define NO_ARG (-1)
+ #define DEL 127
+ #define CTL(x) ((x) & 0x1F)
+ #define ISCTL(x) ((x) && (x) < ' ')
+ #define UNCTL(x) ((x) + 64)
+ #define META(x) ((x) | 0x80)
+ #define ISMETA(x) ((x) & 0x80)
+ #define UNMETA(x) ((x) & 0x7F)
+ #if !defined(HIST_SIZE)
+ #define HIST_SIZE 20
+ #endif /* !defined(HIST_SIZE) */
+
+ /*
+ ** Command status codes.
+ */
+ typedef enum _STATUS {
+ CSdone, CSeof, CSmove, CSdispatch, CSstay, CSsignal
+ } STATUS;
+
+ /*
+ ** The type of case-changing to perform.
+ */
+ typedef enum _CASE {
+ TOupper, TOlower
+ } CASE;
+
+ /*
+ ** Key to command mapping.
+ */
+ typedef struct _KEYMAP {
+ CHAR Key;
+ STATUS (*Function)();
+ } KEYMAP;
+
+ /*
+ ** Command history structure.
+ */
+ typedef struct _HISTORY {
+ int Size;
+ int Pos;
+ CHAR *Lines[HIST_SIZE];
+ } HISTORY;
+
+ /*
+ ** Globals.
+ */
+ int rl_eof;
+ int rl_erase;
+ int rl_intr;
+ int rl_kill;
+ int rl_quit;
+
+ STATIC CHAR NIL[] = "";
+ STATIC CONST CHAR *Input = NIL;
+ STATIC CHAR *Line;
+ STATIC CONST char *Prompt;
+ STATIC CHAR *Yanked;
+ STATIC char *Screen;
+ STATIC char NEWLINE[]= CRLF;
+ STATIC HISTORY H;
+ STATIC int Repeat;
+ STATIC int End;
+ STATIC int Mark;
+ STATIC int OldPoint;
+ STATIC int Point;
+ STATIC int PushBack;
+ STATIC int Pushed;
+ STATIC int Signal;
+ FORWARD KEYMAP Map[32];
+ FORWARD KEYMAP MetaMap[16];
+ STATIC SIZE_T Length;
+ STATIC SIZE_T ScreenCount;
+ STATIC SIZE_T ScreenSize;
+ STATIC char *backspace;
+ STATIC int TTYwidth;
+ STATIC int TTYrows;
+
+ /* Display print 8-bit chars as `M-x' or as the actual 8-bit char? */
+ int rl_meta_chars = 0;
+
+ /*
+ ** Declarations.
+ */
+ STATIC CHAR *editinput();
+ extern int read();
+ extern int write();
+ #if defined(USE_TERMCAP)
+ extern char *getenv();
+ extern char *tgetstr();
+ extern int tgetent();
+ #endif /* defined(USE_TERMCAP) */
+
+ /*
+ ** TTY input/output functions.
+ */
+
+ STATIC void
+ TTYflush()
+ {
+ if (ScreenCount) {
+ (void)write(1, Screen, ScreenCount);
+ ScreenCount = 0;
+ }
+ }
+
+ STATIC void
+ TTYput(c)
+ CHAR c;
+ {
+ Screen[ScreenCount] = c;
+ if (++ScreenCount >= ScreenSize - 1) {
+ ScreenSize += SCREEN_INC;
+ RENEW(Screen, char, ScreenSize);
+ }
+ }
+
+ STATIC void
+ TTYputs(p)
+ CHAR *p;
+ {
+ while (*p)
+ TTYput(*p++);
+ }
+
+ STATIC void
+ TTYshow(c)
+ CHAR c;
+ {
+ if (c == DEL) {
+ TTYput('^');
+ TTYput('?');
+ }
+ else if (ISCTL(c)) {
+ TTYput('^');
+ TTYput(UNCTL(c));
+ }
+ else if (rl_meta_chars && ISMETA(c)) {
+ TTYput('M');
+ TTYput('-');
+ TTYput(UNMETA(c));
+ }
+ else
+ TTYput(c);
+ }
+
+ STATIC void
+ TTYstring(p)
+ CHAR *p;
+ {
+ while (*p)
+ TTYshow(*p++);
+ }
+
+ STATIC unsigned int
+ TTYget()
+ {
+ CHAR c;
+
+ TTYflush();
+ if (Pushed) {
+ Pushed = 0;
+ return PushBack;
+ }
+ if (*Input)
+ return *Input++;
+ return read(0, &c, (SIZE_T)1) == 1 ? c : EOF;
+ }
+
+ #define TTYback() (backspace ? TTYputs((CHAR *)backspace) : TTYput('\b'))
+
+ STATIC void
+ TTYbackn(n)
+ int n;
+ {
+ while (--n >= 0)
+ TTYback();
+ }
+
+ STATIC void
+ TTYinfo()
+ {
+ static int init;
+ #if defined(USE_TERMCAP)
+ char *term;
+ char buff[2048];
+ char *bp, *p;
+ #endif /* defined(USE_TERMCAP) */
+ #if defined(TIOCGWINSZ)
+ struct winsize W;
+ #endif /* defined(TIOCGWINSZ) */
+
+ if (init) {
+ #if defined(TIOCGWINSZ)
+ /* Perhaps we got resized. */
+ if (ioctl(0, TIOCGWINSZ, &W) >= 0
+ && W.ws_col > 0 && W.ws_row > 0) {
+ TTYwidth = (int)W.ws_col;
+ TTYrows = (int)W.ws_row;
+ }
+ #endif /* defined(TIOCGWINSZ) */
+ return;
+ }
+ init++;
+
+ TTYwidth = TTYrows = 0;
+ #if defined(USE_TERMCAP)
+ bp = &buff[0];
+ if ((term = getenv("TERM")) == NULL)
+ term = "dumb";
+ if (tgetent(buff, term) < 0) {
+ TTYwidth = SCREEN_WIDTH;
+ TTYrows = SCREEN_ROWS;
+ return;
+ }
+ p = tgetstr("le", &bp);
+ backspace = p ? strdup(p) : NULL;
+ TTYwidth = tgetnum("co");
+ TTYrows = tgetnum("li");
+ #endif /* defined(USE_TERMCAP) */
+
+ #if defined(TIOCGWINSZ)
+ if (ioctl(0, TIOCGWINSZ, &W) >= 0) {
+ TTYwidth = (int)W.ws_col;
+ TTYrows = (int)W.ws_row;
+ }
+ #endif /* defined(TIOCGWINSZ) */
+
+ if (TTYwidth <= 0 || TTYrows <= 0) {
+ TTYwidth = SCREEN_WIDTH;
+ TTYrows = SCREEN_ROWS;
+ }
+ }
+
+
+ STATIC void
+ reposition()
+ {
+ int i;
+ CHAR *p;
+
+ TTYput('\r');
+ TTYputs((CONST CHAR *)Prompt);
+ for (i = Point, p = Line; --i >= 0; p++)
+ TTYshow(*p);
+ }
+
+ STATIC void
+ left(Change)
+ STATUS Change;
+ {
+ TTYback();
+ if (Point) {
+ if (ISCTL(Line[Point - 1]))
+ TTYback();
+ else if (rl_meta_chars && ISMETA(Line[Point - 1])) {
+ TTYback();
+ TTYback();
+ }
+ }
+ if (Change == CSmove)
+ Point--;
+ }
+
+ STATIC void
+ right(Change)
+ STATUS Change;
+ {
+ TTYshow(Line[Point]);
+ if (Change == CSmove)
+ Point++;
+ }
+
+ STATIC STATUS
+ ring_bell()
+ {
+ TTYput('\07');
+ TTYflush();
+ return CSstay;
+ }
+
+ STATIC STATUS
+ do_macro(c)
+ unsigned int c;
+ {
+ CHAR name[4];
+
+ name[0] = '_';
+ name[1] = c;
+ name[2] = '_';
+ name[3] = '\0';
+
+ if ((Input = (CHAR *)getenv((char *)name)) == NULL) {
+ Input = NIL;
+ return ring_bell();
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ do_forward(move)
+ STATUS move;
+ {
+ int i;
+ CHAR *p;
+
+ i = 0;
+ do {
+ p = &Line[Point];
+ for ( ; Point < End && (*p == ' ' || !isalnum(*p)); Point++, p++)
+ if (move == CSmove)
+ right(CSstay);
+
+ for (; Point < End && isalnum(*p); Point++, p++)
+ if (move == CSmove)
+ right(CSstay);
+
+ if (Point == End)
+ break;
+ } while (++i < Repeat);
+
+ return CSstay;
+ }
+
+ STATIC STATUS
+ do_case(type)
+ CASE type;
+ {
+ int i;
+ int end;
+ int count;
+ CHAR *p;
+
+ (void)do_forward(CSstay);
+ if (OldPoint != Point) {
+ if ((count = Point - OldPoint) < 0)
+ count = -count;
+ Point = OldPoint;
+ if ((end = Point + count) > End)
+ end = End;
+ for (i = Point, p = &Line[i]; i < end; i++, p++) {
+ if (type == TOupper) {
+ if (islower(*p))
+ *p = toupper(*p);
+ }
+ else if (isupper(*p))
+ *p = tolower(*p);
+ right(CSmove);
+ }
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ case_down_word()
+ {
+ return do_case(TOlower);
+ }
+
+ STATIC STATUS
+ case_up_word()
+ {
+ return do_case(TOupper);
+ }
+
+ STATIC void
+ ceol()
+ {
+ int extras;
+ int i;
+ CHAR *p;
+
+ for (extras = 0, i = Point, p = &Line[i]; i <= End; i++, p++) {
+ TTYput(' ');
+ if (ISCTL(*p)) {
+ TTYput(' ');
+ extras++;
+ }
+ else if (rl_meta_chars && ISMETA(*p)) {
+ TTYput(' ');
+ TTYput(' ');
+ extras += 2;
+ }
+ }
+
+ for (i += extras; i > Point; i--)
+ TTYback();
+ }
+
+ STATIC void
+ clear_line()
+ {
+ Point = -strlen(Prompt);
+ TTYput('\r');
+ ceol();
+ Point = 0;
+ End = 0;
+ Line[0] = '\0';
+ }
+
+ STATIC STATUS
+ insert_string(p)
+ CHAR *p;
+ {
+ SIZE_T len;
+ int i;
+ CHAR *new;
+ CHAR *q;
+
+ len = strlen((char *)p);
+ if (End + len >= Length) {
+ if ((new = NEW(CHAR, Length + len + MEM_INC)) == NULL)
+ return CSstay;
+ if (Length) {
+ COPYFROMTO(new, Line, Length);
+ DISPOSE(Line);
+ }
+ Line = new;
+ Length += len + MEM_INC;
+ }
+
+ for (q = &Line[Point], i = End - Point; --i >= 0; )
+ q[len + i] = q[i];
+ COPYFROMTO(&Line[Point], p, len);
+ End += len;
+ Line[End] = '\0';
+ TTYstring(&Line[Point]);
+ Point += len;
+
+ return Point == End ? CSstay : CSmove;
+ }
+
+ STATIC STATUS
+ redisplay()
+ {
+ TTYputs((CONST CHAR *)NEWLINE);
+ TTYputs((CONST CHAR *)Prompt);
+ TTYstring(Line);
+ return CSmove;
+ }
+
+ STATIC STATUS
+ toggle_meta_mode()
+ {
+ rl_meta_chars = ! rl_meta_chars;
+ return redisplay();
+ }
+
+
+ STATIC CHAR *
+ next_hist()
+ {
+ return H.Pos >= H.Size - 1 ? NULL : H.Lines[++H.Pos];
+ }
+
+ STATIC CHAR *
+ prev_hist()
+ {
+ return H.Pos == 0 ? NULL : H.Lines[--H.Pos];
+ }
+
+ STATIC STATUS
+ do_insert_hist(p)
+ CHAR *p;
+ {
+ if (p == NULL)
+ return ring_bell();
+ Point = 0;
+ reposition();
+ ceol();
+ End = 0;
+ return insert_string(p);
+ }
+
+ STATIC STATUS
+ do_hist(move)
+ CHAR *(*move)();
+ {
+ CHAR *p;
+ int i;
+
+ i = 0;
+ do {
+ if ((p = (*move)()) == NULL)
+ return ring_bell();
+ } while (++i < Repeat);
+ return do_insert_hist(p);
+ }
+
+ STATIC STATUS
+ h_next()
+ {
+ return do_hist(next_hist);
+ }
+
+ STATIC STATUS
+ h_prev()
+ {
+ return do_hist(prev_hist);
+ }
+
+ STATIC STATUS
+ h_first()
+ {
+ return do_insert_hist(H.Lines[H.Pos = 0]);
+ }
+
+ STATIC STATUS
+ h_last()
+ {
+ return do_insert_hist(H.Lines[H.Pos = H.Size - 1]);
+ }
+
+ /*
+ ** Return zero if pat appears as a substring in text.
+ */
+ STATIC int
+ substrcmp(text, pat, len)
+ char *text;
+ char *pat;
+ int len;
+ {
+ char c;
+
+ if ((c = *pat) == '\0')
+ return *text == '\0';
+ for ( ; *text; text++)
+ if (*text == c && strncmp(text, pat, len) == 0)
+ return 0;
+ return 1;
+ }
+
+ STATIC CHAR *
+ search_hist(search, move)
+ CHAR *search;
+ CHAR *(*move)();
+ {
+ static CHAR *old_search;
+ int len;
+ int pos;
+ int (*match)();
+ char *pat;
+
+ /* Save or get remembered search pattern. */
+ if (search && *search) {
+ if (old_search)
+ DISPOSE(old_search);
+ old_search = (CHAR *)strdup((char *)search);
+ }
+ else {
+ if (old_search == NULL || *old_search == '\0')
+ return NULL;
+ search = old_search;
+ }
+
+ /* Set up pattern-finder. */
+ if (*search == '^') {
+ match = strncmp;
+ pat = (char *)(search + 1);
+ }
+ else {
+ match = substrcmp;
+ pat = (char *)search;
+ }
+ len = strlen(pat);
+
+ for (pos = H.Pos; (*move)() != NULL; )
+ if ((*match)((char *)H.Lines[H.Pos], pat, len) == 0)
+ return H.Lines[H.Pos];
+ H.Pos = pos;
+ return NULL;
+ }
+
+ STATIC STATUS
+ h_search()
+ {
+ static int Searching;
+ CONST char *old_prompt;
+ CHAR *(*move)();
+ CHAR *p;
+
+ if (Searching)
+ return ring_bell();
+ Searching = 1;
+
+ clear_line();
+ old_prompt = Prompt;
+ Prompt = "Search: ";
+ TTYputs((CONST CHAR *)Prompt);
+ move = Repeat == NO_ARG ? prev_hist : next_hist;
+ p = editinput();
+ Prompt = old_prompt;
+ Searching = 0;
+ TTYputs((CONST CHAR *)Prompt);
+ if (p == NULL && Signal > 0) {
+ Signal = 0;
+ clear_line();
+ return redisplay();
+ }
+ p = search_hist(p, move);
+ clear_line();
+ if (p == NULL) {
+ (void)ring_bell();
+ return redisplay();
+ }
+ return do_insert_hist(p);
+ }
+
+ STATIC STATUS
+ fd_char()
+ {
+ int i;
+
+ i = 0;
+ do {
+ if (Point >= End)
+ break;
+ right(CSmove);
+ } while (++i < Repeat);
+ return CSstay;
+ }
+
+ STATIC void
+ save_yank(begin, i)
+ int begin;
+ int i;
+ {
+ if (Yanked) {
+ DISPOSE(Yanked);
+ Yanked = NULL;
+ }
+
+ if (i < 1)
+ return;
+
+ if ((Yanked = NEW(CHAR, (SIZE_T)i + 1)) != NULL) {
+ COPYFROMTO(Yanked, &Line[begin], i);
+ Yanked[i] = '\0';
+ }
+ }
+
+ STATIC STATUS
+ delete_string(count)
+ int count;
+ {
+ int i;
+ CHAR *p;
+
+ if (count <= 0 || End == Point)
+ return ring_bell();
+
+ if (count == 1 && Point == End - 1) {
+ /* Optimize common case of delete at end of line. */
+ End--;
+ p = &Line[Point];
+ i = 1;
+ TTYput(' ');
+ if (ISCTL(*p)) {
+ i = 2;
+ TTYput(' ');
+ }
+ else if (rl_meta_chars && ISMETA(*p)) {
+ i = 3;
+ TTYput(' ');
+ TTYput(' ');
+ }
+ TTYbackn(i);
+ *p = '\0';
+ return CSmove;
+ }
+ if (Point + count > End && (count = End - Point) <= 0)
+ return CSstay;
+
+ if (count > 1)
+ save_yank(Point, count);
+
+ for (p = &Line[Point], i = End - (Point + count) + 1; --i >= 0; p++)
+ p[0] = p[count];
+ ceol();
+ End -= count;
+ TTYstring(&Line[Point]);
+ return CSmove;
+ }
+
+ STATIC STATUS
+ bk_char()
+ {
+ int i;
+
+ i = 0;
+ do {
+ if (Point == 0)
+ break;
+ left(CSmove);
+ } while (++i < Repeat);
+
+ return CSstay;
+ }
+
+ STATIC STATUS
+ bk_del_char()
+ {
+ int i;
+
+ i = 0;
+ do {
+ if (Point == 0)
+ break;
+ left(CSmove);
+ } while (++i < Repeat);
+
+ return delete_string(i);
+ }
+
+ STATIC STATUS
+ kill_line()
+ {
+ int i;
+
+ if (Repeat != NO_ARG) {
+ if (Repeat < Point) {
+ i = Point;
+ Point = Repeat;
+ reposition();
+ (void)delete_string(i - Point);
+ }
+ else if (Repeat > Point) {
+ right(CSmove);
+ (void)delete_string(Repeat - Point - 1);
+ }
+ return CSmove;
+ }
+
+ save_yank(Point, End - Point);
+ Line[Point] = '\0';
+ ceol();
+ End = Point;
+ return CSstay;
+ }
+
+ STATIC STATUS
+ insert_char(c)
+ int c;
+ {
+ STATUS s;
+ CHAR buff[2];
+ CHAR *p;
+ CHAR *q;
+ int i;
+
+ if (Repeat == NO_ARG || Repeat < 2) {
+ buff[0] = c;
+ buff[1] = '\0';
+ return insert_string(buff);
+ }
+
+ if ((p = NEW(CHAR, Repeat + 1)) == NULL)
+ return CSstay;
+ for (i = Repeat, q = p; --i >= 0; )
+ *q++ = c;
+ *q = '\0';
+ Repeat = 0;
+ s = insert_string(p);
+ DISPOSE(p);
+ return s;
+ }
+
+ STATIC STATUS
+ meta()
+ {
+ unsigned int c;
+ KEYMAP *kp;
+
+ if ((c = TTYget()) == EOF)
+ return CSeof;
+ #if defined(ANSI_ARROWS)
+ /* Also include VT-100 arrows. */
+ if (c == '[' || c == 'O')
+ switch (c = TTYget()) {
+ default: return ring_bell();
+ case EOF: return CSeof;
+ case 'A': return h_prev();
+ case 'B': return h_next();
+ case 'C': return fd_char();
+ case 'D': return bk_char();
+ }
+ #endif /* defined(ANSI_ARROWS) */
+
+ if (isdigit(c)) {
+ for (Repeat = c - '0'; (c = TTYget()) != EOF && isdigit(c); )
+ Repeat = Repeat * 10 + c - '0';
+ Pushed = 1;
+ PushBack = c;
+ return CSstay;
+ }
+
+ if (isupper(c))
+ return do_macro(c);
+ for (OldPoint = Point, kp = MetaMap; kp->Function; kp++)
+ if (kp->Key == c)
+ return (*kp->Function)();
+
+ return ring_bell();
+ }
+
+ STATIC STATUS
+ emacs(c)
+ unsigned int c;
+ {
+ STATUS s;
+ KEYMAP *kp;
+
+ if (rl_meta_chars && ISMETA(c)) {
+ Pushed = 1;
+ PushBack = UNMETA(c);
+ return meta();
+ }
+ for (kp = Map; kp->Function; kp++)
+ if (kp->Key == c)
+ break;
+ s = kp->Function ? (*kp->Function)() : insert_char((int)c);
+ if (!Pushed)
+ /* No pushback means no repeat count; hacky, but true. */
+ Repeat = NO_ARG;
+ return s;
+ }
+
+ STATIC STATUS
+ TTYspecial(c)
+ unsigned int c;
+ {
+ if (ISMETA(c))
+ return CSdispatch;
+
+ if (c == rl_erase || c == DEL)
+ return bk_del_char();
+ if (c == rl_kill) {
+ if (Point != 0) {
+ Point = 0;
+ reposition();
+ }
+ Repeat = NO_ARG;
+ return kill_line();
+ }
+ if (c == rl_eof && Point == 0 && End == 0)
+ return CSeof;
+ if (c == rl_intr) {
+ Signal = SIGINT;
+ return CSsignal;
+ }
+ if (c == rl_quit) {
+ Signal = SIGQUIT;
+ return CSeof;
+ }
+
+ return CSdispatch;
+ }
+
+ STATIC CHAR *
+ editinput()
+ {
+ unsigned int c;
+
+ Repeat = NO_ARG;
+ OldPoint = Point = Mark = End = 0;
+ Line[0] = '\0';
+
+ Signal = -1;
+ while ((c = TTYget()) != EOF)
+ switch (TTYspecial(c)) {
+ case CSdone:
+ return Line;
+ case CSeof:
+ return NULL;
+ case CSsignal:
+ return (CHAR *)"";
+ case CSmove:
+ reposition();
+ break;
+ case CSdispatch:
+ switch (emacs(c)) {
+ case CSdone:
+ return Line;
+ case CSeof:
+ return NULL;
+ case CSsignal:
+ return (CHAR *)"";
+ case CSmove:
+ reposition();
+ break;
+ case CSdispatch:
+ case CSstay:
+ break;
+ }
+ break;
+ case CSstay:
+ break;
+ }
+ return NULL;
+ }
+
+ STATIC void
+ hist_add(p)
+ CHAR *p;
+ {
+ int i;
+
+ if ((p = (CHAR *)strdup((char *)p)) == NULL)
+ return;
+ if (H.Size < HIST_SIZE)
+ H.Lines[H.Size++] = p;
+ else {
+ DISPOSE(H.Lines[0]);
+ for (i = 0; i < HIST_SIZE - 1; i++)
+ H.Lines[i] = H.Lines[i + 1];
+ H.Lines[i] = p;
+ }
+ H.Pos = H.Size - 1;
+ }
+
+ /*
+ ** For compatibility with FSF readline.
+ */
+ /* ARGSUSED0 */
+ void
+ rl_reset_terminal(p)
+ char *p;
+ {
+ }
+
+ void
+ rl_initialize()
+ {
+ }
+
+ char *
+ readline(prompt)
+ CONST char *prompt;
+ {
+ CHAR *line;
+ int s;
+
+ if (Line == NULL) {
+ Length = MEM_INC;
+ if ((Line = NEW(CHAR, Length)) == NULL)
+ return NULL;
+ }
+
+ TTYinfo();
+ rl_ttyset(0);
+ hist_add(NIL);
+ ScreenSize = SCREEN_INC;
+ Screen = NEW(char, ScreenSize);
+ Prompt = prompt ? prompt : (char *)NIL;
+ TTYputs((CONST CHAR *)Prompt);
+ if ((line = editinput()) != NULL) {
+ line = (CHAR *)strdup((char *)line);
+ TTYputs((CHAR *)NEWLINE);
+ TTYflush();
+ }
+ rl_ttyset(1);
+ DISPOSE(Screen);
+ DISPOSE(H.Lines[--H.Size]);
+ if (Signal > 0) {
+ s = Signal;
+ Signal = 0;
+ (void)kill(getpid(), s);
+ }
+ return (char *)line;
+ }
+
+ void
+ add_history(p)
+ char *p;
+ {
+ if (p == NULL || *p == '\0')
+ return;
+
+ #if defined(UNIQUE_HISTORY)
+ if (H.Size && strcmp(p, H.Lines[H.Size - 1]) == 0)
+ return;
+ #endif /* defined(UNIQUE_HISTORY) */
+ hist_add((CHAR *)p);
+ }
+
+
+ STATIC STATUS
+ beg_line()
+ {
+ if (Point) {
+ Point = 0;
+ return CSmove;
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ del_char()
+ {
+ return delete_string(Repeat == NO_ARG ? 1 : Repeat);
+ }
+
+ STATIC STATUS
+ end_line()
+ {
+ if (Point != End) {
+ Point = End;
+ return CSmove;
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ accept_line()
+ {
+ Line[End] = '\0';
+ return CSdone;
+ }
+
+ STATIC STATUS
+ transpose()
+ {
+ CHAR c;
+
+ if (Point) {
+ if (Point == End)
+ left(CSmove);
+ c = Line[Point - 1];
+ left(CSstay);
+ Line[Point - 1] = Line[Point];
+ TTYshow(Line[Point - 1]);
+ Line[Point++] = c;
+ TTYshow(c);
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ quote()
+ {
+ unsigned int c;
+
+ return (c = TTYget()) == EOF ? CSeof : insert_char((int)c);
+ }
+
+ STATIC STATUS
+ wipe()
+ {
+ int i;
+
+ if (Mark > End)
+ return ring_bell();
+
+ if (Point > Mark) {
+ i = Point;
+ Point = Mark;
+ Mark = i;
+ reposition();
+ }
+
+ return delete_string(Mark - Point);
+ }
+
+ STATIC STATUS
+ mk_set()
+ {
+ Mark = Point;
+ return CSstay;
+ }
+
+ STATIC STATUS
+ exchange()
+ {
+ unsigned int c;
+
+ if ((c = TTYget()) != CTL('X'))
+ return c == EOF ? CSeof : ring_bell();
+
+ if ((c = Mark) <= End) {
+ Mark = Point;
+ Point = c;
+ return CSmove;
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ yank()
+ {
+ if (Yanked && *Yanked)
+ return insert_string(Yanked);
+ return CSstay;
+ }
+
+ STATIC STATUS
+ copy_region()
+ {
+ if (Mark > End)
+ return ring_bell();
+
+ if (Point > Mark)
+ save_yank(Mark, Point - Mark);
+ else
+ save_yank(Point, Mark - Point);
+
+ return CSstay;
+ }
+
+ STATIC STATUS
+ move_to_char()
+ {
+ unsigned int c;
+ int i;
+ CHAR *p;
+
+ if ((c = TTYget()) == EOF)
+ return CSeof;
+ for (i = Point + 1, p = &Line[i]; i < End; i++, p++)
+ if (*p == c) {
+ Point = i;
+ return CSmove;
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ fd_word()
+ {
+ return do_forward(CSmove);
+ }
+
+ STATIC STATUS
+ fd_kill_word()
+ {
+ int i;
+
+ (void)do_forward(CSstay);
+ if (OldPoint != Point) {
+ i = Point - OldPoint;
+ Point = OldPoint;
+ return delete_string(i);
+ }
+ return CSstay;
+ }
+
+ STATIC STATUS
+ bk_word()
+ {
+ int i;
+ CHAR *p;
+
+ i = 0;
+ do {
+ for (p = &Line[Point]; p > Line && !isalnum(p[-1]); p--)
+ left(CSmove);
+
+ for (; p > Line && p[-1] != ' ' && isalnum(p[-1]); p--)
+ left(CSmove);
+
+ if (Point == 0)
+ break;
+ } while (++i < Repeat);
+
+ return CSstay;
+ }
+
+ STATIC STATUS
+ bk_kill_word()
+ {
+ (void)bk_word();
+ if (OldPoint != Point)
+ return delete_string(OldPoint - Point);
+ return CSstay;
+ }
+
+ STATIC int
+ argify(line, avp)
+ CHAR *line;
+ CHAR ***avp;
+ {
+ CHAR *c;
+ CHAR **p;
+ CHAR **new;
+ int ac;
+ int i;
+
+ i = MEM_INC;
+ if ((*avp = p = NEW(CHAR*, i))== NULL)
+ return 0;
+
+ for (c = line; isspace(*c); c++)
+ continue;
+ if (*c == '\n' || *c == '\0')
+ return 0;
+
+ for (ac = 0, p[ac++] = c; *c && *c != '\n'; ) {
+ if (isspace(*c)) {
+ *c++ = '\0';
+ if (*c && *c != '\n') {
+ if (ac + 1 == i) {
+ new = NEW(CHAR*, i + MEM_INC);
+ if (new == NULL) {
+ p[ac] = NULL;
+ return ac;
+ }
+ COPYFROMTO(new, p, i * sizeof (char **));
+ i += MEM_INC;
+ DISPOSE(p);
+ *avp = p = new;
+ }
+ p[ac++] = c;
+ }
+ }
+ else
+ c++;
+ }
+ *c = '\0';
+ p[ac] = NULL;
+ return ac;
+ }
+
+ STATIC STATUS
+ last_argument()
+ {
+ CHAR **av;
+ CHAR *p;
+ STATUS s;
+ int ac;
+
+ if (H.Size == 1 || (p = H.Lines[H.Size - 2]) == NULL)
+ return ring_bell();
+
+ if ((p = (CHAR *)strdup((char *)p)) == NULL)
+ return CSstay;
+ ac = argify(p, &av);
+
+ if (Repeat != NO_ARG)
+ s = Repeat < ac ? insert_string(av[Repeat]) : ring_bell();
+ else
+ s = ac ? insert_string(av[ac - 1]) : CSstay;
+
+ if (ac)
+ DISPOSE(av);
+ DISPOSE(p);
+ return s;
+ }
+
+ STATIC KEYMAP Map[32] = {
+ { CTL('@'), ring_bell },
+ { CTL('A'), beg_line },
+ { CTL('B'), bk_char },
+ { CTL('D'), del_char },
+ { CTL('E'), end_line },
+ { CTL('F'), fd_char },
+ { CTL('G'), ring_bell },
+ { CTL('H'), bk_del_char },
+ { CTL('J'), accept_line },
+ { CTL('K'), kill_line },
+ { CTL('L'), redisplay },
+ { CTL('M'), accept_line },
+ { CTL('N'), h_next },
+ { CTL('O'), ring_bell },
+ { CTL('P'), h_prev },
+ { CTL('Q'), ring_bell },
+ { CTL('R'), h_search },
+ { CTL('S'), ring_bell },
+ { CTL('T'), transpose },
+ { CTL('U'), ring_bell },
+ { CTL('V'), quote },
+ { CTL('W'), wipe },
+ { CTL('X'), exchange },
+ { CTL('Y'), yank },
+ { CTL('Z'), ring_bell },
+ { CTL('['), meta },
+ { CTL(']'), move_to_char },
+ { CTL('^'), ring_bell },
+ { CTL('_'), ring_bell },
+ { 0, NULL }
+ };
+
+ STATIC KEYMAP MetaMap[16]= {
+ { CTL('H'), bk_kill_word },
+ { DEL, bk_kill_word },
+ { ' ', mk_set },
+ { '.', last_argument },
+ { '<', h_first },
+ { '>', h_last },
+ { 'b', bk_word },
+ { 'd', fd_kill_word },
+ { 'f', fd_word },
+ { 'l', case_down_word },
+ { 'm', toggle_meta_mode },
+ { 'u', case_up_word },
+ { 'y', yank },
+ { 'w', copy_region },
+ { 0, NULL }
+ };
+
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