256 lines
5.5 KiB
C
256 lines
5.5 KiB
C
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/* $NetBSD: parse.c,v 1.5 1997/01/11 09:57:08 lukem 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#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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static char rcsid[] = "$NetBSD: parse.c,v 1.5 1997/01/11 09:57:08 lukem Exp $";
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#endif
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#endif /* not lint && not SCCSID */
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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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* 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 "sys.h"
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#include "el.h"
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#include "tokenizer.h"
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private struct {
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char *name;
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int (*func) __P((EditLine *, int, char **));
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} cmds[] = {
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{ "bind", map_bind },
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{ "echotc", term_echotc },
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{ "history", hist_list },
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{ "telltc", term_telltc },
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{ "settc", term_settc },
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{ "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(el, line)
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EditLine *el;
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const char *line;
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{
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char **argv;
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int argc;
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Tokenizer *tok;
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tok = tok_init(NULL);
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tok_line(tok, line, &argc, &argv);
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argc = el_parse(el, argc, argv);
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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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el_parse(el, argc, argv)
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EditLine *el;
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int argc;
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char *argv[];
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{
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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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*ptr++ = '\0';
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if (! el_match(el->el_prog, argv[0]))
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return 0;
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}
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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> 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(ptr)
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const char ** const ptr;
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{
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const char *p;
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int 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 '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 & 0xffffff00) != 0)
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return -1;
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--p;
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}
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break;
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default:
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c = *p;
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break;
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}
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}
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else if (*p == '^' && isalpha((unsigned char) p[1])) {
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p++;
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c = (*p == '?') ? '\177' : (*p & 0237);
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}
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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(out, in)
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char *out;
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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++ = n;
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break;
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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(el, cmd)
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EditLine *el;
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const char *cmd;
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{
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el_bindings_t *b;
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for (b = el->el_map.help; b->name != NULL; b++)
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if (strcmp(b->name, cmd) == 0)
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return b->func;
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return -1;
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}
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