/* $NetBSD: parse.c,v 1.26 2011/08/16 16:25:15 christos Exp $ */
/*-
* 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.
*/
#include "config.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: parse.c,v 1.26 2011/08/16 16:25:15 christos Exp $");
#endif
#endif /* not lint && not SCCSID */
/*
* parse.c: parse an editline extended command
*
* commands are:
*
* bind
* echotc
* edit
* gettc
* history
* settc
* setty
*/
#include "el.h"
#include <stdlib.h>
private const struct {
const Char *name;
int (*func)(EditLine *, int, const Char **);
} cmds[] = {
{ STR("bind"), map_bind },
{ STR("echotc"), terminal_echotc },
{ STR("edit"), el_editmode },
{ STR("history"), hist_command },
{ STR("telltc"), terminal_telltc },
{ STR("settc"), terminal_settc },
{ STR("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;
TYPE(Tokenizer) *tok;
tok = FUN(tok,init)(NULL);
FUN(tok,str)(tok, line, &argc, &argv);
argc = FUN(el,parse)(el, argc, argv);
FUN(tok,end)(tok);
return argc;
}
/* el_parse():
* Command dispatcher
*/
public int
FUN(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 = (size_t)(ptr - argv[0] - 1);
tprog = el_malloc((l + 1) * sizeof(*tprog));
if (tprog == NULL)
return 0;
(void) Strncpy(tprog, argv[0], l);
tprog[l] = '\0';
ptr++;
l = (size_t)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> \U+xxxx 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 'U': /* Unicode \U+xxxx or \U+xxxxx format */
{
int i;
const Char hex[] = STR("0123456789ABCDEF");
const Char *h;
++p;
if (*p++ != '+')
return -1;
c = 0;
for (i = 0; i < 5; ++i) {
h = Strchr(hex, *p++);
if (!h && i < 4)
return -1;
else if (h)
c = (c << 4) | ((int)(h - hex));
else
--p;
}
if (c > 0x10FFFF) /* outside valid character range */
return -1;
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 & (wint_t)0xffffff00) != (wint_t)0)
return -1;
--p;
break;
}
default:
c = *p;
break;
}
} else if (*p == '^') {
p++;
c = (*p == '?') ? '\177' : (*p & 0237);
} else
c = *p;
*ptr = ++p;
return 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;
}