450aba5b34
Re-import libedit 2016-02-27 This reverts r296435: the issues related to lldb and this update appear to have been identified (in lldb). Obtained from: NetBSD Reported by: emaste MFC after: 3 weeks
292 lines
6.6 KiB
C
292 lines
6.6 KiB
C
/* $NetBSD: parse.c,v 1.35 2016/02/17 19:47:49 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[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: parse.c,v 1.35 2016/02/17 19:47:49 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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* parse.c: parse an editline extended command
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*
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* commands are:
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*
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* bind
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* echotc
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* edit
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* gettc
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* history
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* settc
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* setty
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "el.h"
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#include "parse.h"
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private const struct {
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const Char *name;
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int (*func)(EditLine *, int, const Char **);
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} cmds[] = {
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{ STR("bind"), map_bind },
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{ STR("echotc"), terminal_echotc },
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{ STR("edit"), el_editmode },
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{ STR("history"), hist_command },
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{ STR("telltc"), terminal_telltc },
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{ STR("settc"), terminal_settc },
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{ STR("setty"), tty_stty },
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{ NULL, NULL }
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};
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/* parse_line():
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* Parse a line and dispatch it
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*/
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protected int
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parse_line(EditLine *el, const Char *line)
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{
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const Char **argv;
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int argc;
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TYPE(Tokenizer) *tok;
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tok = FUN(tok,init)(NULL);
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FUN(tok,str)(tok, line, &argc, &argv);
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argc = FUN(el,parse)(el, argc, argv);
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FUN(tok,end)(tok);
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return argc;
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}
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/* el_parse():
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* Command dispatcher
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*/
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public int
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FUN(el,parse)(EditLine *el, int argc, const Char *argv[])
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{
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const Char *ptr;
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int i;
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if (argc < 1)
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return -1;
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ptr = Strchr(argv[0], ':');
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if (ptr != NULL) {
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Char *tprog;
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size_t l;
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if (ptr == argv[0])
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return 0;
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l = (size_t)(ptr - argv[0] - 1);
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tprog = el_malloc((l + 1) * sizeof(*tprog));
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if (tprog == NULL)
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return 0;
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(void) Strncpy(tprog, argv[0], l);
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tprog[l] = '\0';
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ptr++;
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l = (size_t)el_match(el->el_prog, tprog);
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el_free(tprog);
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if (!l)
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return 0;
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} else
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ptr = argv[0];
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for (i = 0; cmds[i].name != NULL; i++)
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if (Strcmp(cmds[i].name, ptr) == 0) {
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i = (*cmds[i].func) (el, argc, argv);
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return -i;
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}
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return -1;
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}
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/* parse__escape():
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* Parse a string of the form ^<char> \<odigit> \<char> \U+xxxx and return
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* the appropriate character or -1 if the escape is not valid
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*/
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protected int
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parse__escape(const Char **ptr)
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{
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const Char *p;
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wint_t c;
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p = *ptr;
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if (p[1] == 0)
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return -1;
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if (*p == '\\') {
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p++;
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switch (*p) {
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case 'a':
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c = '\007'; /* Bell */
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break;
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case 'b':
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c = '\010'; /* Backspace */
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break;
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case 't':
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c = '\011'; /* Horizontal Tab */
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break;
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case 'n':
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c = '\012'; /* New Line */
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break;
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case 'v':
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c = '\013'; /* Vertical Tab */
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break;
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case 'f':
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c = '\014'; /* Form Feed */
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break;
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case 'r':
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c = '\015'; /* Carriage Return */
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break;
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case 'e':
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c = '\033'; /* Escape */
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break;
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case 'U': /* Unicode \U+xxxx or \U+xxxxx format */
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{
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int i;
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const Char hex[] = STR("0123456789ABCDEF");
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const Char *h;
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++p;
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if (*p++ != '+')
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return -1;
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c = 0;
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for (i = 0; i < 5; ++i) {
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h = Strchr(hex, *p++);
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if (!h && i < 4)
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return -1;
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else if (h)
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c = (c << 4) | ((int)(h - hex));
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else
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--p;
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}
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if (c > 0x10FFFF) /* outside valid character range */
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return -1;
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break;
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}
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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{
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int cnt, ch;
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for (cnt = 0, c = 0; cnt < 3; cnt++) {
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ch = *p++;
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if (ch < '0' || ch > '7') {
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p--;
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break;
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}
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c = (c << 3) | (ch - '0');
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}
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if ((c & (wint_t)0xffffff00) != (wint_t)0)
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return -1;
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--p;
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break;
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}
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default:
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c = *p;
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break;
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}
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} else if (*p == '^') {
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p++;
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c = (*p == '?') ? '\177' : (*p & 0237);
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} else
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c = *p;
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*ptr = ++p;
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return c;
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}
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/* parse__string():
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* Parse the escapes from in and put the raw string out
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*/
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protected Char *
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parse__string(Char *out, const Char *in)
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{
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Char *rv = out;
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int n;
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for (;;)
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switch (*in) {
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case '\0':
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*out = '\0';
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return rv;
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case '\\':
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case '^':
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if ((n = parse__escape(&in)) == -1)
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return NULL;
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*out++ = (Char)n;
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break;
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case 'M':
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if (in[1] == '-' && in[2] != '\0') {
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*out++ = '\033';
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in += 2;
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break;
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}
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/*FALLTHROUGH*/
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default:
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*out++ = *in++;
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break;
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}
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}
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/* parse_cmd():
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* Return the command number for the command string given
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* or -1 if one is not found
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*/
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protected int
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parse_cmd(EditLine *el, const Char *cmd)
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{
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el_bindings_t *b = el->el_map.help;
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size_t i;
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for (i = 0; i < el->el_map.nfunc; i++)
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if (Strcmp(b[i].name, cmd) == 0)
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return b[i].func;
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return -1;
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}
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