/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Christos Zoulas of Cornell University.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $NetBSD: parse.c,v 1.22 2005/05/29 04:58:15 lukem Exp $
*/
#if !defined(lint) && !defined(SCCSID)
static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93";
#endif /* not lint && not SCCSID */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* parse.c: parse an editline extended command
*
* commands are:
*
* bind
* echotc
* edit
* gettc
* history
* settc
* setty
*/
#include "sys.h"
#include "el.h"
#include <stdlib.h>
private const struct {
const char *name;
int (*func)(EditLine *, int, const char **);
} cmds[] = {
{ "bind", map_bind },
{ "echotc", term_echotc },
{ "edit", el_editmode },
{ "history", hist_command },
{ "telltc", term_telltc },
{ "settc", term_settc },
{ "setty", tty_stty },
{ NULL, NULL }
};
/* parse_line():
* Parse a line and dispatch it
*/
protected int
parse_line(EditLine *el, const char *line)
{
const char **argv;
int argc;
Tokenizer *tok;
tok = tok_init(NULL);
tok_str(tok, line, &argc, &argv);
argc = el_parse(el, argc, argv);
tok_end(tok);
return (argc);
}
/* el_parse():
* Command dispatcher
*/
public int
el_parse(EditLine *el, int argc, const char *argv[])
{
const char *ptr;
int i;
if (argc < 1)
return (-1);
ptr = strchr(argv[0], ':');
if (ptr != NULL) {
char *tprog;
size_t l;
if (ptr == argv[0])
return (0);
l = ptr - argv[0] - 1;
tprog = (char *) el_malloc(l + 1);
if (tprog == NULL)
return (0);
(void) strncpy(tprog, argv[0], l);
tprog[l] = '\0';
ptr++;
l = el_match(el->el_prog, tprog);
el_free(tprog);
if (!l)
return (0);
} else
ptr = argv[0];
for (i = 0; cmds[i].name != NULL; i++)
if (strcmp(cmds[i].name, ptr) == 0) {
i = (*cmds[i].func) (el, argc, argv);
return (-i);
}
return (-1);
}
/* parse__escape():
* Parse a string of the form ^<char> \<odigit> \<char> and return
* the appropriate character or -1 if the escape is not valid
*/
protected int
parse__escape(const char **ptr)
{
const char *p;
int c;
p = *ptr;
if (p[1] == 0)
return (-1);
if (*p == '\\') {
p++;
switch (*p) {
case 'a':
c = '\007'; /* Bell */
break;
case 'b':
c = '\010'; /* Backspace */
break;
case 't':
c = '\011'; /* Horizontal Tab */
break;
case 'n':
c = '\012'; /* New Line */
break;
case 'v':
c = '\013'; /* Vertical Tab */
break;
case 'f':
c = '\014'; /* Form Feed */
break;
case 'r':
c = '\015'; /* Carriage Return */
break;
case 'e':
c = '\033'; /* Escape */
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
{
int cnt, ch;
for (cnt = 0, c = 0; cnt < 3; cnt++) {
ch = *p++;
if (ch < '0' || ch > '7') {
p--;
break;
}
c = (c << 3) | (ch - '0');
}
if ((c & 0xffffff00) != 0)
return (-1);
--p;
break;
}
default:
c = *p;
break;
}
} else if (*p == '^') {
p++;
c = (*p == '?') ? '\177' : (*p & 0237);
} else
c = *p;
*ptr = ++p;
return ((unsigned char)c);
}
/* parse__string():
* Parse the escapes from in and put the raw string out
*/
protected char *
parse__string(char *out, const char *in)
{
char *rv = out;
int n;
for (;;)
switch (*in) {
case '\0':
*out = '\0';
return (rv);
case '\\':
case '^':
if ((n = parse__escape(&in)) == -1)
return (NULL);
*out++ = n;
break;
case 'M':
if (in[1] == '-' && in[2] != '\0') {
*out++ = '\033';
in += 2;
break;
}
/*FALLTHROUGH*/
default:
*out++ = *in++;
break;
}
}
/* parse_cmd():
* Return the command number for the command string given
* or -1 if one is not found
*/
protected int
parse_cmd(EditLine *el, const char *cmd)
{
el_bindings_t *b;
for (b = el->el_map.help; b->name != NULL; b++)
if (strcmp(b->name, cmd) == 0)
return (b->func);
return (-1);
}
