1f37f0f18f
Undo update of libedit 2016-02-27 Something in libedit appears to be causing breakage in lldb38. The changes are not generally huge but they are suficient to to justify reverting for now. Reported by: novel, bapt
738 lines
16 KiB
C
738 lines
16 KiB
C
/* $NetBSD: read.c,v 1.71 2014/07/06 18:15:34 christos Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Christos Zoulas of Cornell University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "config.h"
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#if !defined(lint) && !defined(SCCSID)
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#if 0
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static char sccsid[] = "@(#)read.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: read.c,v 1.71 2014/07/06 18:15:34 christos Exp $");
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#endif
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#endif /* not lint && not SCCSID */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* read.c: Clean this junk up! This is horrible code.
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* Terminal read functions
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "el.h"
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#define OKCMD -1 /* must be -1! */
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private int read__fixio(int, int);
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private int read_preread(EditLine *);
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private int read_char(EditLine *, Char *);
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private int read_getcmd(EditLine *, el_action_t *, Char *);
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private void read_pop(c_macro_t *);
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/* read_init():
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* Initialize the read stuff
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*/
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protected int
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read_init(EditLine *el)
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{
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/* builtin read_char */
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el->el_read.read_char = read_char;
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return 0;
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}
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/* el_read_setfn():
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* Set the read char function to the one provided.
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* If it is set to EL_BUILTIN_GETCFN, then reset to the builtin one.
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*/
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protected int
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el_read_setfn(EditLine *el, el_rfunc_t rc)
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{
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el->el_read.read_char = (rc == EL_BUILTIN_GETCFN) ? read_char : rc;
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return 0;
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}
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/* el_read_getfn():
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* return the current read char function, or EL_BUILTIN_GETCFN
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* if it is the default one
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*/
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protected el_rfunc_t
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el_read_getfn(EditLine *el)
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{
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return el->el_read.read_char == read_char ?
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EL_BUILTIN_GETCFN : el->el_read.read_char;
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}
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#ifndef MIN
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#define MIN(A,B) ((A) < (B) ? (A) : (B))
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#endif
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#ifdef DEBUG_EDIT
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private void
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read_debug(EditLine *el)
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{
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if (el->el_line.cursor > el->el_line.lastchar)
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(void) fprintf(el->el_errfile, "cursor > lastchar\r\n");
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if (el->el_line.cursor < el->el_line.buffer)
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(void) fprintf(el->el_errfile, "cursor < buffer\r\n");
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if (el->el_line.cursor > el->el_line.limit)
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(void) fprintf(el->el_errfile, "cursor > limit\r\n");
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if (el->el_line.lastchar > el->el_line.limit)
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(void) fprintf(el->el_errfile, "lastchar > limit\r\n");
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if (el->el_line.limit != &el->el_line.buffer[EL_BUFSIZ - 2])
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(void) fprintf(el->el_errfile, "limit != &buffer[EL_BUFSIZ-2]\r\n");
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}
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#endif /* DEBUG_EDIT */
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/* read__fixio():
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* Try to recover from a read error
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*/
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/* ARGSUSED */
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private int
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read__fixio(int fd __attribute__((__unused__)), int e)
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{
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switch (e) {
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case -1: /* Make sure that the code is reachable */
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#ifdef EWOULDBLOCK
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case EWOULDBLOCK:
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#ifndef TRY_AGAIN
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#define TRY_AGAIN
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#endif
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#endif /* EWOULDBLOCK */
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#if defined(POSIX) && defined(EAGAIN)
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#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
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case EAGAIN:
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#ifndef TRY_AGAIN
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#define TRY_AGAIN
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#endif
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#endif /* EWOULDBLOCK && EWOULDBLOCK != EAGAIN */
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#endif /* POSIX && EAGAIN */
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e = 0;
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#ifdef TRY_AGAIN
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#if defined(F_SETFL) && defined(O_NDELAY)
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if ((e = fcntl(fd, F_GETFL, 0)) == -1)
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return -1;
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if (fcntl(fd, F_SETFL, e & ~O_NDELAY) == -1)
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return -1;
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else
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e = 1;
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#endif /* F_SETFL && O_NDELAY */
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#ifdef FIONBIO
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{
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int zero = 0;
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if (ioctl(fd, FIONBIO, &zero) == -1)
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return -1;
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else
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e = 1;
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}
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#endif /* FIONBIO */
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#endif /* TRY_AGAIN */
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return e ? 0 : -1;
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case EINTR:
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return 0;
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default:
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return -1;
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}
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}
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/* read_preread():
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* Try to read the stuff in the input queue;
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*/
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private int
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read_preread(EditLine *el)
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{
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int chrs = 0;
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if (el->el_tty.t_mode == ED_IO)
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return 0;
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#ifndef WIDECHAR
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/* FIONREAD attempts to buffer up multiple bytes, and to make that work
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* properly with partial wide/UTF-8 characters would need some careful work. */
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#ifdef FIONREAD
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(void) ioctl(el->el_infd, FIONREAD, &chrs);
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if (chrs > 0) {
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char buf[EL_BUFSIZ];
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chrs = read(el->el_infd, buf,
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(size_t) MIN(chrs, EL_BUFSIZ - 1));
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if (chrs > 0) {
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buf[chrs] = '\0';
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el_push(el, buf);
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}
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}
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#endif /* FIONREAD */
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#endif
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return chrs > 0;
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}
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/* el_push():
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* Push a macro
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*/
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public void
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FUN(el,push)(EditLine *el, const Char *str)
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{
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c_macro_t *ma = &el->el_chared.c_macro;
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if (str != NULL && ma->level + 1 < EL_MAXMACRO) {
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ma->level++;
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if ((ma->macro[ma->level] = Strdup(str)) != NULL)
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return;
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ma->level--;
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}
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terminal_beep(el);
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terminal__flush(el);
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}
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/* read_getcmd():
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* Get next command from the input stream, return OKCMD on success.
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* Character values > 255 are not looked up in the map, but inserted.
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*/
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private int
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read_getcmd(EditLine *el, el_action_t *cmdnum, Char *ch)
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{
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el_action_t cmd;
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int num;
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el->el_errno = 0;
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do {
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if ((num = FUN(el,getc)(el, ch)) != 1) {/* if EOF or error */
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el->el_errno = num == 0 ? 0 : errno;
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return 0; /* not OKCMD */
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}
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#ifdef KANJI
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if ((*ch & 0200)) {
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el->el_state.metanext = 0;
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cmd = CcViMap[' '];
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break;
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} else
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#endif /* KANJI */
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if (el->el_state.metanext) {
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el->el_state.metanext = 0;
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*ch |= 0200;
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}
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#ifdef WIDECHAR
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if (*ch >= N_KEYS)
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cmd = ED_INSERT;
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else
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#endif
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cmd = el->el_map.current[(unsigned char) *ch];
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if (cmd == ED_SEQUENCE_LEAD_IN) {
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keymacro_value_t val;
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switch (keymacro_get(el, ch, &val)) {
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case XK_CMD:
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cmd = val.cmd;
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break;
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case XK_STR:
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FUN(el,push)(el, val.str);
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break;
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#ifdef notyet
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case XK_EXE:
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/* XXX: In the future to run a user function */
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RunCommand(val.str);
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break;
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#endif
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default:
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EL_ABORT((el->el_errfile, "Bad XK_ type \n"));
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break;
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}
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}
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if (el->el_map.alt == NULL)
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el->el_map.current = el->el_map.key;
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} while (cmd == ED_SEQUENCE_LEAD_IN);
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*cmdnum = cmd;
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return OKCMD;
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}
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#ifdef WIDECHAR
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/* utf8_islead():
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* Test whether a byte is a leading byte of a UTF-8 sequence.
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*/
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private int
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utf8_islead(int c)
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{
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return c < 0x80 || /* single byte char */
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(c >= 0xc2 && c <= 0xf4); /* start of multibyte sequence */
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}
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#endif
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/* read_char():
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* Read a character from the tty.
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*/
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private int
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read_char(EditLine *el, Char *cp)
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{
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ssize_t num_read;
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int tried = 0;
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char cbuf[MB_LEN_MAX];
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size_t cbp = 0;
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int bytes = 0;
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again:
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el->el_signal->sig_no = 0;
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while ((num_read = read(el->el_infd, cbuf + cbp, (size_t)1)) == -1) {
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int e = errno;
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switch (el->el_signal->sig_no) {
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case SIGCONT:
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FUN(el,set)(el, EL_REFRESH);
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/*FALLTHROUGH*/
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case SIGWINCH:
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sig_set(el);
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goto again;
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default:
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break;
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}
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if (!tried && read__fixio(el->el_infd, e) == 0)
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tried = 1;
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else {
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errno = e;
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*cp = '\0';
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return -1;
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}
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}
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/* Test for EOF */
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if (num_read == 0) {
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errno = 0;
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*cp = '\0';
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return 0;
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}
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#ifdef WIDECHAR
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if (el->el_flags & CHARSET_IS_UTF8) {
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if (!utf8_islead((unsigned char)cbuf[0]))
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goto again; /* discard the byte we read and try again */
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++cbp;
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if ((bytes = ct_mbtowc(cp, cbuf, cbp)) == -1) {
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ct_mbtowc_reset;
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if (cbp >= MB_LEN_MAX) { /* "shouldn't happen" */
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errno = EILSEQ;
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*cp = '\0';
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return -1;
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}
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goto again;
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}
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} else if (isascii((unsigned char)cbuf[0]) ||
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/* we don't support other multibyte charsets */
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++cbp != 1 ||
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/* Try non-ASCII characters in a 8-bit character set */
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(bytes = ct_mbtowc(cp, cbuf, cbp)) != 1)
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#endif
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*cp = (unsigned char)cbuf[0];
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if ((el->el_flags & IGNORE_EXTCHARS) && bytes > 1) {
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cbp = 0; /* skip this character */
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goto again;
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}
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return (int)num_read;
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}
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/* read_pop():
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* Pop a macro from the stack
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*/
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private void
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read_pop(c_macro_t *ma)
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{
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int i;
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el_free(ma->macro[0]);
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for (i = 0; i < ma->level; i++)
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ma->macro[i] = ma->macro[i + 1];
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ma->level--;
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ma->offset = 0;
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}
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/* el_getc():
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* Read a character
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*/
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public int
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FUN(el,getc)(EditLine *el, Char *cp)
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{
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int num_read;
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c_macro_t *ma = &el->el_chared.c_macro;
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terminal__flush(el);
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for (;;) {
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if (ma->level < 0) {
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if (!read_preread(el))
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break;
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}
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if (ma->level < 0)
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break;
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if (ma->macro[0][ma->offset] == '\0') {
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read_pop(ma);
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continue;
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}
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*cp = ma->macro[0][ma->offset++];
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if (ma->macro[0][ma->offset] == '\0') {
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/* Needed for QuoteMode On */
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read_pop(ma);
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}
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return 1;
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}
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#ifdef DEBUG_READ
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(void) fprintf(el->el_errfile, "Turning raw mode on\n");
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#endif /* DEBUG_READ */
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if (tty_rawmode(el) < 0)/* make sure the tty is set up correctly */
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return 0;
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|
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#ifdef DEBUG_READ
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(void) fprintf(el->el_errfile, "Reading a character\n");
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#endif /* DEBUG_READ */
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num_read = (*el->el_read.read_char)(el, cp);
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if (num_read < 0)
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el->el_errno = errno;
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#ifdef WIDECHAR
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if (el->el_flags & NARROW_READ)
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*cp = *(char *)(void *)cp;
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#endif
|
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#ifdef DEBUG_READ
|
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(void) fprintf(el->el_errfile, "Got it %c\n", *cp);
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#endif /* DEBUG_READ */
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return num_read;
|
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}
|
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|
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protected void
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read_prepare(EditLine *el)
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{
|
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if (el->el_flags & HANDLE_SIGNALS)
|
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sig_set(el);
|
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if (el->el_flags & NO_TTY)
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return;
|
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if ((el->el_flags & (UNBUFFERED|EDIT_DISABLED)) == UNBUFFERED)
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tty_rawmode(el);
|
|
|
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/* This is relatively cheap, and things go terribly wrong if
|
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we have the wrong size. */
|
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el_resize(el);
|
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re_clear_display(el); /* reset the display stuff */
|
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ch_reset(el, 0);
|
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re_refresh(el); /* print the prompt */
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|
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if (el->el_flags & UNBUFFERED)
|
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terminal__flush(el);
|
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}
|
|
|
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protected void
|
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read_finish(EditLine *el)
|
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{
|
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if ((el->el_flags & UNBUFFERED) == 0)
|
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(void) tty_cookedmode(el);
|
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if (el->el_flags & HANDLE_SIGNALS)
|
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sig_clr(el);
|
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}
|
|
|
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public const Char *
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FUN(el,gets)(EditLine *el, int *nread)
|
|
{
|
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int retval;
|
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el_action_t cmdnum = 0;
|
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int num; /* how many chars we have read at NL */
|
|
Char ch, *cp;
|
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int crlf = 0;
|
|
int nrb;
|
|
#ifdef FIONREAD
|
|
c_macro_t *ma = &el->el_chared.c_macro;
|
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#endif /* FIONREAD */
|
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|
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if (nread == NULL)
|
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nread = &nrb;
|
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*nread = 0;
|
|
|
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if (el->el_flags & NO_TTY) {
|
|
size_t idx;
|
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|
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cp = el->el_line.buffer;
|
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while ((num = (*el->el_read.read_char)(el, cp)) == 1) {
|
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/* make sure there is space for next character */
|
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if (cp + 1 >= el->el_line.limit) {
|
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idx = (size_t)(cp - el->el_line.buffer);
|
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if (!ch_enlargebufs(el, (size_t)2))
|
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break;
|
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cp = &el->el_line.buffer[idx];
|
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}
|
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cp++;
|
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if (el->el_flags & UNBUFFERED)
|
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break;
|
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if (cp[-1] == '\r' || cp[-1] == '\n')
|
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break;
|
|
}
|
|
if (num == -1) {
|
|
if (errno == EINTR)
|
|
cp = el->el_line.buffer;
|
|
el->el_errno = errno;
|
|
}
|
|
|
|
goto noedit;
|
|
}
|
|
|
|
|
|
#ifdef FIONREAD
|
|
if (el->el_tty.t_mode == EX_IO && ma->level < 0) {
|
|
long chrs = 0;
|
|
|
|
(void) ioctl(el->el_infd, FIONREAD, &chrs);
|
|
if (chrs == 0) {
|
|
if (tty_rawmode(el) < 0) {
|
|
errno = 0;
|
|
*nread = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
#endif /* FIONREAD */
|
|
|
|
if ((el->el_flags & UNBUFFERED) == 0)
|
|
read_prepare(el);
|
|
|
|
if (el->el_flags & EDIT_DISABLED) {
|
|
size_t idx;
|
|
|
|
if ((el->el_flags & UNBUFFERED) == 0)
|
|
cp = el->el_line.buffer;
|
|
else
|
|
cp = el->el_line.lastchar;
|
|
|
|
terminal__flush(el);
|
|
|
|
while ((num = (*el->el_read.read_char)(el, cp)) == 1) {
|
|
/* make sure there is space next character */
|
|
if (cp + 1 >= el->el_line.limit) {
|
|
idx = (size_t)(cp - el->el_line.buffer);
|
|
if (!ch_enlargebufs(el, (size_t)2))
|
|
break;
|
|
cp = &el->el_line.buffer[idx];
|
|
}
|
|
cp++;
|
|
crlf = cp[-1] == '\r' || cp[-1] == '\n';
|
|
if (el->el_flags & UNBUFFERED)
|
|
break;
|
|
if (crlf)
|
|
break;
|
|
}
|
|
|
|
if (num == -1) {
|
|
if (errno == EINTR)
|
|
cp = el->el_line.buffer;
|
|
el->el_errno = errno;
|
|
}
|
|
|
|
goto noedit;
|
|
}
|
|
|
|
for (num = OKCMD; num == OKCMD;) { /* while still editing this
|
|
* line */
|
|
#ifdef DEBUG_EDIT
|
|
read_debug(el);
|
|
#endif /* DEBUG_EDIT */
|
|
/* if EOF or error */
|
|
if ((num = read_getcmd(el, &cmdnum, &ch)) != OKCMD) {
|
|
num = -1;
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile,
|
|
"Returning from el_gets %d\n", num);
|
|
#endif /* DEBUG_READ */
|
|
break;
|
|
}
|
|
if (el->el_errno == EINTR) {
|
|
el->el_line.buffer[0] = '\0';
|
|
el->el_line.lastchar =
|
|
el->el_line.cursor = el->el_line.buffer;
|
|
break;
|
|
}
|
|
if ((size_t)cmdnum >= el->el_map.nfunc) { /* BUG CHECK command */
|
|
#ifdef DEBUG_EDIT
|
|
(void) fprintf(el->el_errfile,
|
|
"ERROR: illegal command from key 0%o\r\n", ch);
|
|
#endif /* DEBUG_EDIT */
|
|
continue; /* try again */
|
|
}
|
|
/* now do the real command */
|
|
#ifdef DEBUG_READ
|
|
{
|
|
el_bindings_t *b;
|
|
for (b = el->el_map.help; b->name; b++)
|
|
if (b->func == cmdnum)
|
|
break;
|
|
if (b->name)
|
|
(void) fprintf(el->el_errfile,
|
|
"Executing %s\n", b->name);
|
|
else
|
|
(void) fprintf(el->el_errfile,
|
|
"Error command = %d\n", cmdnum);
|
|
}
|
|
#endif /* DEBUG_READ */
|
|
/* vi redo needs these way down the levels... */
|
|
el->el_state.thiscmd = cmdnum;
|
|
el->el_state.thisch = ch;
|
|
if (el->el_map.type == MAP_VI &&
|
|
el->el_map.current == el->el_map.key &&
|
|
el->el_chared.c_redo.pos < el->el_chared.c_redo.lim) {
|
|
if (cmdnum == VI_DELETE_PREV_CHAR &&
|
|
el->el_chared.c_redo.pos != el->el_chared.c_redo.buf
|
|
&& Isprint(el->el_chared.c_redo.pos[-1]))
|
|
el->el_chared.c_redo.pos--;
|
|
else
|
|
*el->el_chared.c_redo.pos++ = ch;
|
|
}
|
|
retval = (*el->el_map.func[cmdnum]) (el, ch);
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile,
|
|
"Returned state %d\n", retval );
|
|
#endif /* DEBUG_READ */
|
|
|
|
/* save the last command here */
|
|
el->el_state.lastcmd = cmdnum;
|
|
|
|
/* use any return value */
|
|
switch (retval) {
|
|
case CC_CURSOR:
|
|
re_refresh_cursor(el);
|
|
break;
|
|
|
|
case CC_REDISPLAY:
|
|
re_clear_lines(el);
|
|
re_clear_display(el);
|
|
/* FALLTHROUGH */
|
|
|
|
case CC_REFRESH:
|
|
re_refresh(el);
|
|
break;
|
|
|
|
case CC_REFRESH_BEEP:
|
|
re_refresh(el);
|
|
terminal_beep(el);
|
|
break;
|
|
|
|
case CC_NORM: /* normal char */
|
|
break;
|
|
|
|
case CC_ARGHACK: /* Suggested by Rich Salz */
|
|
/* <rsalz@pineapple.bbn.com> */
|
|
continue; /* keep going... */
|
|
|
|
case CC_EOF: /* end of file typed */
|
|
if ((el->el_flags & UNBUFFERED) == 0)
|
|
num = 0;
|
|
else if (num == -1) {
|
|
*el->el_line.lastchar++ = CONTROL('d');
|
|
el->el_line.cursor = el->el_line.lastchar;
|
|
num = 1;
|
|
}
|
|
break;
|
|
|
|
case CC_NEWLINE: /* normal end of line */
|
|
num = (int)(el->el_line.lastchar - el->el_line.buffer);
|
|
break;
|
|
|
|
case CC_FATAL: /* fatal error, reset to known state */
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile,
|
|
"*** editor fatal ERROR ***\r\n\n");
|
|
#endif /* DEBUG_READ */
|
|
/* put (real) cursor in a known place */
|
|
re_clear_display(el); /* reset the display stuff */
|
|
ch_reset(el, 1); /* reset the input pointers */
|
|
re_refresh(el); /* print the prompt again */
|
|
break;
|
|
|
|
case CC_ERROR:
|
|
default: /* functions we don't know about */
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile,
|
|
"*** editor ERROR ***\r\n\n");
|
|
#endif /* DEBUG_READ */
|
|
terminal_beep(el);
|
|
terminal__flush(el);
|
|
break;
|
|
}
|
|
el->el_state.argument = 1;
|
|
el->el_state.doingarg = 0;
|
|
el->el_chared.c_vcmd.action = NOP;
|
|
if (el->el_flags & UNBUFFERED)
|
|
break;
|
|
}
|
|
|
|
terminal__flush(el); /* flush any buffered output */
|
|
/* make sure the tty is set up correctly */
|
|
if ((el->el_flags & UNBUFFERED) == 0) {
|
|
read_finish(el);
|
|
*nread = num != -1 ? num : 0;
|
|
} else {
|
|
*nread = (int)(el->el_line.lastchar - el->el_line.buffer);
|
|
}
|
|
goto done;
|
|
noedit:
|
|
el->el_line.cursor = el->el_line.lastchar = cp;
|
|
*cp = '\0';
|
|
*nread = (int)(el->el_line.cursor - el->el_line.buffer);
|
|
done:
|
|
if (*nread == 0) {
|
|
if (num == -1) {
|
|
*nread = -1;
|
|
errno = el->el_errno;
|
|
}
|
|
return NULL;
|
|
} else
|
|
return el->el_line.buffer;
|
|
}
|