NetBSD/lib/libedit/parse.c

256 lines
5.4 KiB
C
Raw Normal View History

/* $NetBSD: parse.c,v 1.17 2003/08/07 16:44:32 agc Exp $ */
1994-05-06 10:01:42 +04:00
/*-
* 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
1994-05-06 10:01:42 +04:00
* 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.
*/
#include "config.h"
1994-05-06 10:01:42 +04:00
#if !defined(lint) && !defined(SCCSID)
#if 0
1994-05-06 10:01:42 +04:00
static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: parse.c,v 1.17 2003/08/07 16:44:32 agc Exp $");
#endif
1994-05-06 10:01:42 +04:00
#endif /* not lint && not SCCSID */
/*
* parse.c: parse an editline extended command
*
* commands are:
*
* bind
* echotc
* edit
1994-05-06 10:01:42 +04:00
* gettc
* history
* settc
* setty
1994-05-06 10:01:42 +04:00
*/
#include "el.h"
#include "tokenizer.h"
#include <stdlib.h>
1994-05-06 10:01:42 +04:00
2001-01-23 18:55:30 +03:00
private const struct {
const char *name;
int (*func)(EditLine *, int, const char **);
1994-05-06 10:01:42 +04:00
} cmds[] = {
{ "bind", map_bind },
{ "echotc", term_echotc },
{ "edit", el_editmode },
{ "history", hist_command },
{ "telltc", term_telltc },
{ "settc", term_settc },
{ "setty", tty_stty },
{ NULL, NULL }
1994-05-06 10:01:42 +04:00
};
/* parse_line():
* Parse a line and dispatch it
*/
protected int
parse_line(EditLine *el, const char *line)
1994-05-06 10:01:42 +04:00
{
const char **argv;
int argc;
Tokenizer *tok;
1994-05-06 10:01:42 +04:00
tok = tok_init(NULL);
tok_line(tok, line, &argc, &argv);
argc = el_parse(el, argc, argv);
tok_end(tok);
return (argc);
1994-05-06 10:01:42 +04:00
}
1994-05-06 10:01:42 +04:00
/* el_parse():
* Command dispatcher
*/
public int
el_parse(EditLine *el, int argc, const char *argv[])
1994-05-06 10:01:42 +04:00
{
const char *ptr;
int i;
if (argc < 1)
return (-1);
ptr = strchr(argv[0], ':');
if (ptr != NULL) {
char *tprog;
size_t l;
1994-05-06 10:01:42 +04:00
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];
1994-05-06 10:01:42 +04:00
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);
1994-05-06 10:01:42 +04:00
}
/* 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 **const ptr)
1994-05-06 10:01:42 +04:00
{
const char *p;
int c;
1994-05-06 10:01:42 +04:00
p = *ptr;
1994-05-06 10:01:42 +04:00
if (p[1] == 0)
return (-1);
1994-05-06 10:01:42 +04:00
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;
1994-05-06 10:01:42 +04:00
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;
1994-05-06 10:01:42 +04:00
break;
}
} else if (*p == '^' && isalpha((unsigned char) p[1])) {
p++;
c = (*p == '?') ? '\177' : (*p & 0237);
} else
c = *p;
*ptr = ++p;
return (c);
1994-05-06 10:01:42 +04:00
}
/* parse__string():
* Parse the escapes from in and put the raw string out
*/
protected char *
parse__string(char *out, const char *in)
1994-05-06 10:01:42 +04:00
{
char *rv = out;
int n;
1994-05-06 10:01:42 +04:00
for (;;)
switch (*in) {
case '\0':
*out = '\0';
return (rv);
1994-05-06 10:01:42 +04:00
case '\\':
case '^':
if ((n = parse__escape(&in)) == -1)
return (NULL);
*out++ = n;
break;
default:
*out++ = *in++;
break;
}
1994-05-06 10:01:42 +04:00
}
1994-05-06 10:01:42 +04:00
/* 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)
1994-05-06 10:01:42 +04:00
{
el_bindings_t *b;
1994-05-06 10:01:42 +04:00
for (b = el->el_map.help; b->name != NULL; b++)
if (strcmp(b->name, cmd) == 0)
return (b->func);
return (-1);
1994-05-06 10:01:42 +04:00
}