freebsd-skq/lib/libedit/el.c
Baptiste Daroussin 6bbd1d19fd libedit: improve multibyte support
Until this commit libedit only supported UTF-8 for multibyte charset
Improve it to support other multibyte charsets

Tested with eucJP and SJIS charsets.
Note that this change as been review and committed in upstream libedit
as well via christos@NetBSD

Submitted by:	naito.yuichiro _at_ gmail.com
Reviewed by:	bapt, pfg, yuripv, 0mp
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D17903
2018-11-26 08:16:33 +00:00

637 lines
12 KiB
C

/* $NetBSD: el.c,v 1.83 2016/02/24 17:13:22 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[] = "@(#)el.c 8.2 (Berkeley) 1/3/94";
#else
__RCSID("$NetBSD: el.c,v 1.83 2016/02/24 17:13:22 christos Exp $");
#endif
#endif /* not lint && not SCCSID */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* el.c: EditLine interface functions
*/
#include <sys/types.h>
#include <sys/param.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIDECHAR
#include <locale.h>
#include <langinfo.h>
#endif
#include "el.h"
#include "parse.h"
/* el_init():
* Initialize editline and set default parameters.
*/
public EditLine *
el_init(const char *prog, FILE *fin, FILE *fout, FILE *ferr)
{
return el_init_fd(prog, fin, fout, ferr, fileno(fin), fileno(fout),
fileno(ferr));
}
public EditLine *
el_init_fd(const char *prog, FILE *fin, FILE *fout, FILE *ferr,
int fdin, int fdout, int fderr)
{
EditLine *el = el_malloc(sizeof(*el));
if (el == NULL)
return NULL;
memset(el, 0, sizeof(EditLine));
el->el_infile = fin;
el->el_outfile = fout;
el->el_errfile = ferr;
el->el_infd = fdin;
el->el_outfd = fdout;
el->el_errfd = fderr;
el->el_prog = Strdup(ct_decode_string(prog, &el->el_scratch));
if (el->el_prog == NULL) {
el_free(el);
return NULL;
}
/*
* Initialize all the modules. Order is important!!!
*/
el->el_flags = 0;
if (terminal_init(el) == -1) {
el_free(el->el_prog);
el_free(el);
return NULL;
}
(void) keymacro_init(el);
(void) map_init(el);
if (tty_init(el) == -1)
el->el_flags |= NO_TTY;
(void) ch_init(el);
(void) search_init(el);
(void) hist_init(el);
(void) prompt_init(el);
(void) sig_init(el);
(void) read_init(el);
return el;
}
/* el_end():
* Clean up.
*/
public void
el_end(EditLine *el)
{
if (el == NULL)
return;
el_reset(el);
terminal_end(el);
keymacro_end(el);
map_end(el);
if (!(el->el_flags & NO_TTY))
tty_end(el);
ch_end(el);
search_end(el);
hist_end(el);
prompt_end(el);
sig_end(el);
el_free(el->el_prog);
#ifdef WIDECHAR
el_free(el->el_scratch.cbuff);
el_free(el->el_scratch.wbuff);
el_free(el->el_lgcyconv.cbuff);
el_free(el->el_lgcyconv.wbuff);
#endif
el_free(el);
}
/* el_reset():
* Reset the tty and the parser
*/
public void
el_reset(EditLine *el)
{
tty_cookedmode(el);
ch_reset(el, 0); /* XXX: Do we want that? */
}
/* el_set():
* set the editline parameters
*/
public int
FUN(el,set)(EditLine *el, int op, ...)
{
va_list ap;
int rv = 0;
if (el == NULL)
return -1;
va_start(ap, op);
switch (op) {
case EL_PROMPT:
case EL_RPROMPT: {
el_pfunc_t p = va_arg(ap, el_pfunc_t);
rv = prompt_set(el, p, 0, op, 1);
break;
}
case EL_RESIZE: {
el_zfunc_t p = va_arg(ap, el_zfunc_t);
void *arg = va_arg(ap, void *);
rv = ch_resizefun(el, p, arg);
break;
}
case EL_ALIAS_TEXT: {
el_afunc_t p = va_arg(ap, el_afunc_t);
void *arg = va_arg(ap, void *);
rv = ch_aliasfun(el, p, arg);
break;
}
case EL_PROMPT_ESC:
case EL_RPROMPT_ESC: {
el_pfunc_t p = va_arg(ap, el_pfunc_t);
int c = va_arg(ap, int);
rv = prompt_set(el, p, (Char)c, op, 1);
break;
}
case EL_TERMINAL:
rv = terminal_set(el, va_arg(ap, char *));
break;
case EL_EDITOR:
rv = map_set_editor(el, va_arg(ap, Char *));
break;
case EL_SIGNAL:
if (va_arg(ap, int))
el->el_flags |= HANDLE_SIGNALS;
else
el->el_flags &= ~HANDLE_SIGNALS;
break;
case EL_BIND:
case EL_TELLTC:
case EL_SETTC:
case EL_ECHOTC:
case EL_SETTY:
{
const Char *argv[20];
int i;
for (i = 1; i < (int)__arraycount(argv); i++)
if ((argv[i] = va_arg(ap, Char *)) == NULL)
break;
switch (op) {
case EL_BIND:
argv[0] = STR("bind");
rv = map_bind(el, i, argv);
break;
case EL_TELLTC:
argv[0] = STR("telltc");
rv = terminal_telltc(el, i, argv);
break;
case EL_SETTC:
argv[0] = STR("settc");
rv = terminal_settc(el, i, argv);
break;
case EL_ECHOTC:
argv[0] = STR("echotc");
rv = terminal_echotc(el, i, argv);
break;
case EL_SETTY:
argv[0] = STR("setty");
rv = tty_stty(el, i, argv);
break;
default:
rv = -1;
EL_ABORT((el->el_errfile, "Bad op %d\n", op));
break;
}
break;
}
case EL_ADDFN:
{
Char *name = va_arg(ap, Char *);
Char *help = va_arg(ap, Char *);
el_func_t func = va_arg(ap, el_func_t);
rv = map_addfunc(el, name, help, func);
break;
}
case EL_HIST:
{
hist_fun_t func = va_arg(ap, hist_fun_t);
void *ptr = va_arg(ap, void *);
rv = hist_set(el, func, ptr);
if (MB_CUR_MAX == 1)
el->el_flags &= ~NARROW_HISTORY;
break;
}
case EL_EDITMODE:
if (va_arg(ap, int))
el->el_flags &= ~EDIT_DISABLED;
else
el->el_flags |= EDIT_DISABLED;
rv = 0;
break;
case EL_GETCFN:
{
el_rfunc_t rc = va_arg(ap, el_rfunc_t);
rv = el_read_setfn(el, rc);
break;
}
case EL_CLIENTDATA:
el->el_data = va_arg(ap, void *);
break;
case EL_UNBUFFERED:
rv = va_arg(ap, int);
if (rv && !(el->el_flags & UNBUFFERED)) {
el->el_flags |= UNBUFFERED;
read_prepare(el);
} else if (!rv && (el->el_flags & UNBUFFERED)) {
el->el_flags &= ~UNBUFFERED;
read_finish(el);
}
rv = 0;
break;
case EL_PREP_TERM:
rv = va_arg(ap, int);
if (rv)
(void) tty_rawmode(el);
else
(void) tty_cookedmode(el);
rv = 0;
break;
case EL_SETFP:
{
FILE *fp;
int what;
what = va_arg(ap, int);
fp = va_arg(ap, FILE *);
rv = 0;
switch (what) {
case 0:
el->el_infile = fp;
el->el_infd = fileno(fp);
break;
case 1:
el->el_outfile = fp;
el->el_outfd = fileno(fp);
break;
case 2:
el->el_errfile = fp;
el->el_errfd = fileno(fp);
break;
default:
rv = -1;
break;
}
break;
}
case EL_REFRESH:
re_clear_display(el);
re_refresh(el);
terminal__flush(el);
break;
default:
rv = -1;
break;
}
va_end(ap);
return rv;
}
/* el_get():
* retrieve the editline parameters
*/
public int
FUN(el,get)(EditLine *el, int op, ...)
{
va_list ap;
int rv;
if (el == NULL)
return -1;
va_start(ap, op);
switch (op) {
case EL_PROMPT:
case EL_RPROMPT: {
el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
rv = prompt_get(el, p, 0, op);
break;
}
case EL_PROMPT_ESC:
case EL_RPROMPT_ESC: {
el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
Char *c = va_arg(ap, Char *);
rv = prompt_get(el, p, c, op);
break;
}
case EL_EDITOR:
rv = map_get_editor(el, va_arg(ap, const Char **));
break;
case EL_SIGNAL:
*va_arg(ap, int *) = (el->el_flags & HANDLE_SIGNALS);
rv = 0;
break;
case EL_EDITMODE:
*va_arg(ap, int *) = !(el->el_flags & EDIT_DISABLED);
rv = 0;
break;
case EL_TERMINAL:
terminal_get(el, va_arg(ap, const char **));
rv = 0;
break;
case EL_GETTC:
{
static char name[] = "gettc";
char *argv[20];
int i;
for (i = 1; i < (int)__arraycount(argv); i++)
if ((argv[i] = va_arg(ap, char *)) == NULL)
break;
argv[0] = name;
rv = terminal_gettc(el, i, argv);
break;
}
case EL_GETCFN:
*va_arg(ap, el_rfunc_t *) = el_read_getfn(el);
rv = 0;
break;
case EL_CLIENTDATA:
*va_arg(ap, void **) = el->el_data;
rv = 0;
break;
case EL_UNBUFFERED:
*va_arg(ap, int *) = (el->el_flags & UNBUFFERED) != 0;
rv = 0;
break;
case EL_GETFP:
{
int what;
FILE **fpp;
what = va_arg(ap, int);
fpp = va_arg(ap, FILE **);
rv = 0;
switch (what) {
case 0:
*fpp = el->el_infile;
break;
case 1:
*fpp = el->el_outfile;
break;
case 2:
*fpp = el->el_errfile;
break;
default:
rv = -1;
break;
}
break;
}
default:
rv = -1;
break;
}
va_end(ap);
return rv;
}
/* el_line():
* Return editing info
*/
public const TYPE(LineInfo) *
FUN(el,line)(EditLine *el)
{
return (const TYPE(LineInfo) *)(void *)&el->el_line;
}
/* el_source():
* Source a file
*/
public int
el_source(EditLine *el, const char *fname)
{
FILE *fp;
size_t len;
ssize_t slen;
char *ptr;
char *path = NULL;
const Char *dptr;
int error = 0;
fp = NULL;
if (fname == NULL) {
#ifdef HAVE_ISSETUGID
static const char elpath[] = "/.editrc";
size_t plen = sizeof(elpath);
if (issetugid())
return -1;
if ((ptr = getenv("HOME")) == NULL)
return -1;
plen += strlen(ptr);
if ((path = el_malloc(plen * sizeof(*path))) == NULL)
return -1;
(void)snprintf(path, plen, "%s%s", ptr, elpath);
fname = path;
#else
/*
* If issetugid() is missing, always return an error, in order
* to keep from inadvertently opening up the user to a security
* hole.
*/
return -1;
#endif
}
if (fp == NULL)
fp = fopen(fname, "r");
if (fp == NULL) {
el_free(path);
return -1;
}
ptr = NULL;
len = 0;
while ((slen = getline(&ptr, &len, fp)) != -1) {
if (*ptr == '\n')
continue; /* Empty line. */
if (slen > 0 && ptr[--slen] == '\n')
ptr[slen] = '\0';
dptr = ct_decode_string(ptr, &el->el_scratch);
if (!dptr)
continue;
/* loop until first non-space char or EOL */
while (*dptr != '\0' && Isspace(*dptr))
dptr++;
if (*dptr == '#')
continue; /* ignore, this is a comment line */
if ((error = parse_line(el, dptr)) == -1)
break;
}
free(ptr);
el_free(path);
(void) fclose(fp);
return error;
}
/* el_resize():
* Called from program when terminal is resized
*/
public void
el_resize(EditLine *el)
{
int lins, cols;
sigset_t oset, nset;
(void) sigemptyset(&nset);
(void) sigaddset(&nset, SIGWINCH);
(void) sigprocmask(SIG_BLOCK, &nset, &oset);
/* get the correct window size */
if (terminal_get_size(el, &lins, &cols))
terminal_change_size(el, lins, cols);
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
}
/* el_beep():
* Called from the program to beep
*/
public void
el_beep(EditLine *el)
{
terminal_beep(el);
}
/* el_editmode()
* Set the state of EDIT_DISABLED from the `edit' command.
*/
protected int
/*ARGSUSED*/
el_editmode(EditLine *el, int argc, const Char **argv)
{
const Char *how;
if (argv == NULL || argc != 2 || argv[1] == NULL)
return -1;
how = argv[1];
if (Strcmp(how, STR("on")) == 0) {
el->el_flags &= ~EDIT_DISABLED;
tty_rawmode(el);
} else if (Strcmp(how, STR("off")) == 0) {
tty_cookedmode(el);
el->el_flags |= EDIT_DISABLED;
}
else {
(void) fprintf(el->el_errfile, "edit: Bad value `" FSTR "'.\n",
how);
return -1;
}
return 0;
}