/* $NetBSD: keymacro.c,v 1.7 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[] = "@(#)key.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: keymacro.c,v 1.7 2011/08/16 16:25:15 christos Exp $");
#endif
#endif /* not lint && not SCCSID */
/*
* keymacro.c: This module contains the procedures for maintaining
* the extended-key map.
*
* An extended-key (key) is a sequence of keystrokes introduced
* with a sequence introducer and consisting of an arbitrary
* number of characters. This module maintains a map (the
* el->el_keymacro.map)
* to convert these extended-key sequences into input strs
* (XK_STR), editor functions (XK_CMD), or unix commands (XK_EXE).
*
* Warning:
* If key is a substr of some other keys, then the longer
* keys are lost!! That is, if the keys "abcd" and "abcef"
* are in el->el_keymacro.map, adding the key "abc" will cause
* the first two definitions to be lost.
*
* Restrictions:
* -------------
* 1) It is not possible to have one key that is a
* substr of another.
*/
#include <string.h>
#include <stdlib.h>
#include "el.h"
/*
* The Nodes of the el->el_keymacro.map. The el->el_keymacro.map is a
* linked list of these node elements
*/
struct keymacro_node_t {
Char ch; /* single character of key */
int type; /* node type */
keymacro_value_t val; /* command code or pointer to str, */
/* if this is a leaf */
struct keymacro_node_t *next; /* ptr to next char of this key */
struct keymacro_node_t *sibling;/* ptr to another key with same prefix*/
};
private int node_trav(EditLine *, keymacro_node_t *, Char *,
keymacro_value_t *);
private int node__try(EditLine *, keymacro_node_t *, const Char *,
keymacro_value_t *, int);
private keymacro_node_t *node__get(Int);
private void node__free(keymacro_node_t *);
private void node__put(EditLine *, keymacro_node_t *);
private int node__delete(EditLine *, keymacro_node_t **,
const Char *);
private int node_lookup(EditLine *, const Char *,
keymacro_node_t *, size_t);
private int node_enum(EditLine *, keymacro_node_t *, size_t);
#define KEY_BUFSIZ EL_BUFSIZ
/* keymacro_init():
* Initialize the key maps
*/
protected int
keymacro_init(EditLine *el)
{
el->el_keymacro.buf = el_malloc(KEY_BUFSIZ *
sizeof(*el->el_keymacro.buf));
if (el->el_keymacro.buf == NULL)
return -1;
el->el_keymacro.map = NULL;
keymacro_reset(el);
return 0;
}
/* keymacro_end():
* Free the key maps
*/
protected void
keymacro_end(EditLine *el)
{
el_free(el->el_keymacro.buf);
el->el_keymacro.buf = NULL;
node__free(el->el_keymacro.map);
}
/* keymacro_map_cmd():
* Associate cmd with a key value
*/
protected keymacro_value_t *
keymacro_map_cmd(EditLine *el, int cmd)
{
el->el_keymacro.val.cmd = (el_action_t) cmd;
return &el->el_keymacro.val;
}
/* keymacro_map_str():
* Associate str with a key value
*/
protected keymacro_value_t *
keymacro_map_str(EditLine *el, Char *str)
{
el->el_keymacro.val.str = str;
return &el->el_keymacro.val;
}
/* keymacro_reset():
* Takes all nodes on el->el_keymacro.map and puts them on free list.
* Then initializes el->el_keymacro.map with arrow keys
* [Always bind the ansi arrow keys?]
*/
protected void
keymacro_reset(EditLine *el)
{
node__put(el, el->el_keymacro.map);
el->el_keymacro.map = NULL;
return;
}
/* keymacro_get():
* Calls the recursive function with entry point el->el_keymacro.map
* Looks up *ch in map and then reads characters until a
* complete match is found or a mismatch occurs. Returns the
* type of the match found (XK_STR, XK_CMD, or XK_EXE).
* Returns NULL in val.str and XK_STR for no match.
* The last character read is returned in *ch.
*/
protected int
keymacro_get(EditLine *el, Char *ch, keymacro_value_t *val)
{
return node_trav(el, el->el_keymacro.map, ch, val);
}
/* keymacro_add():
* Adds key to the el->el_keymacro.map and associates the value in
* val with it. If key is already is in el->el_keymacro.map, the new
* code is applied to the existing key. Ntype specifies if code is a
* command, an out str or a unix command.
*/
protected void
keymacro_add(EditLine *el, const Char *key, keymacro_value_t *val, int ntype)
{
if (key[0] == '\0') {
(void) fprintf(el->el_errfile,
"keymacro_add: Null extended-key not allowed.\n");
return;
}
if (ntype == XK_CMD && val->cmd == ED_SEQUENCE_LEAD_IN) {
(void) fprintf(el->el_errfile,
"keymacro_add: sequence-lead-in command not allowed\n");
return;
}
if (el->el_keymacro.map == NULL)
/* tree is initially empty. Set up new node to match key[0] */
el->el_keymacro.map = node__get(key[0]);
/* it is properly initialized */
/* Now recurse through el->el_keymacro.map */
(void) node__try(el, el->el_keymacro.map, key, val, ntype);
return;
}
/* keymacro_clear():
*
*/
protected void
keymacro_clear(EditLine *el, el_action_t *map, const Char *in)
{
#ifdef WIDECHAR
if (*in > N_KEYS) /* can't be in the map */
return;
#endif
if ((map[(unsigned char)*in] == ED_SEQUENCE_LEAD_IN) &&
((map == el->el_map.key &&
el->el_map.alt[(unsigned char)*in] != ED_SEQUENCE_LEAD_IN) ||
(map == el->el_map.alt &&
el->el_map.key[(unsigned char)*in] != ED_SEQUENCE_LEAD_IN)))
(void) keymacro_delete(el, in);
}
/* keymacro_delete():
* Delete the key and all longer keys staring with key, if
* they exists.
*/
protected int
keymacro_delete(EditLine *el, const Char *key)
{
if (key[0] == '\0') {
(void) fprintf(el->el_errfile,
"keymacro_delete: Null extended-key not allowed.\n");
return -1;
}
if (el->el_keymacro.map == NULL)
return 0;
(void) node__delete(el, &el->el_keymacro.map, key);
return 0;
}
/* keymacro_print():
* Print the binding associated with key key.
* Print entire el->el_keymacro.map if null
*/
protected void
keymacro_print(EditLine *el, const Char *key)
{
/* do nothing if el->el_keymacro.map is empty and null key specified */
if (el->el_keymacro.map == NULL && *key == 0)
return;
el->el_keymacro.buf[0] = '"';
if (node_lookup(el, key, el->el_keymacro.map, (size_t)1) <= -1)
/* key is not bound */
(void) fprintf(el->el_errfile, "Unbound extended key \"" FSTR
"\"\n", key);
return;
}
/* node_trav():
* recursively traverses node in tree until match or mismatch is
* found. May read in more characters.
*/
private int
node_trav(EditLine *el, keymacro_node_t *ptr, Char *ch, keymacro_value_t *val)
{
if (ptr->ch == *ch) {
/* match found */
if (ptr->next) {
/* key not complete so get next char */
if (FUN(el,getc)(el, ch) != 1) {/* if EOF or error */
val->cmd = ED_END_OF_FILE;
return XK_CMD;
/* PWP: Pretend we just read an end-of-file */
}
return node_trav(el, ptr->next, ch, val);
} else {
*val = ptr->val;
if (ptr->type != XK_CMD)
*ch = '\0';
return ptr->type;
}
} else {
/* no match found here */
if (ptr->sibling) {
/* try next sibling */
return node_trav(el, ptr->sibling, ch, val);
} else {
/* no next sibling -- mismatch */
val->str = NULL;
return XK_STR;
}
}
}
/* node__try():
* Find a node that matches *str or allocate a new one
*/
private int
node__try(EditLine *el, keymacro_node_t *ptr, const Char *str,
keymacro_value_t *val, int ntype)
{
if (ptr->ch != *str) {
keymacro_node_t *xm;
for (xm = ptr; xm->sibling != NULL; xm = xm->sibling)
if (xm->sibling->ch == *str)
break;
if (xm->sibling == NULL)
xm->sibling = node__get(*str); /* setup new node */
ptr = xm->sibling;
}
if (*++str == '\0') {
/* we're there */
if (ptr->next != NULL) {
node__put(el, ptr->next);
/* lose longer keys with this prefix */
ptr->next = NULL;
}
switch (ptr->type) {
case XK_CMD:
case XK_NOD:
break;
case XK_STR:
case XK_EXE:
if (ptr->val.str)
el_free(ptr->val.str);
break;
default:
EL_ABORT((el->el_errfile, "Bad XK_ type %d\n",
ptr->type));
break;
}
switch (ptr->type = ntype) {
case XK_CMD:
ptr->val = *val;
break;
case XK_STR:
case XK_EXE:
if ((ptr->val.str = Strdup(val->str)) == NULL)
return -1;
break;
default:
EL_ABORT((el->el_errfile, "Bad XK_ type %d\n", ntype));
break;
}
} else {
/* still more chars to go */
if (ptr->next == NULL)
ptr->next = node__get(*str); /* setup new node */
(void) node__try(el, ptr->next, str, val, ntype);
}
return 0;
}
/* node__delete():
* Delete node that matches str
*/
private int
node__delete(EditLine *el, keymacro_node_t **inptr, const Char *str)
{
keymacro_node_t *ptr;
keymacro_node_t *prev_ptr = NULL;
ptr = *inptr;
if (ptr->ch != *str) {
keymacro_node_t *xm;
for (xm = ptr; xm->sibling != NULL; xm = xm->sibling)
if (xm->sibling->ch == *str)
break;
if (xm->sibling == NULL)
return 0;
prev_ptr = xm;
ptr = xm->sibling;
}
if (*++str == '\0') {
/* we're there */
if (prev_ptr == NULL)
*inptr = ptr->sibling;
else
prev_ptr->sibling = ptr->sibling;
ptr->sibling = NULL;
node__put(el, ptr);
return 1;
} else if (ptr->next != NULL &&
node__delete(el, &ptr->next, str) == 1) {
if (ptr->next != NULL)
return 0;
if (prev_ptr == NULL)
*inptr = ptr->sibling;
else
prev_ptr->sibling = ptr->sibling;
ptr->sibling = NULL;
node__put(el, ptr);
return 1;
} else {
return 0;
}
}
/* node__put():
* Puts a tree of nodes onto free list using free(3).
*/
private void
node__put(EditLine *el, keymacro_node_t *ptr)
{
if (ptr == NULL)
return;
if (ptr->next != NULL) {
node__put(el, ptr->next);
ptr->next = NULL;
}
node__put(el, ptr->sibling);
switch (ptr->type) {
case XK_CMD:
case XK_NOD:
break;
case XK_EXE:
case XK_STR:
if (ptr->val.str != NULL)
el_free(ptr->val.str);
break;
default:
EL_ABORT((el->el_errfile, "Bad XK_ type %d\n", ptr->type));
break;
}
el_free(ptr);
}
/* node__get():
* Returns pointer to a keymacro_node_t for ch.
*/
private keymacro_node_t *
node__get(Int ch)
{
keymacro_node_t *ptr;
ptr = el_malloc(sizeof(*ptr));
if (ptr == NULL)
return NULL;
ptr->ch = ch;
ptr->type = XK_NOD;
ptr->val.str = NULL;
ptr->next = NULL;
ptr->sibling = NULL;
return ptr;
}
private void
node__free(keymacro_node_t *k)
{
if (k == NULL)
return;
node__free(k->sibling);
node__free(k->next);
el_free(k);
}
/* node_lookup():
* look for the str starting at node ptr.
* Print if last node
*/
private int
node_lookup(EditLine *el, const Char *str, keymacro_node_t *ptr, size_t cnt)
{
ssize_t used;
if (ptr == NULL)
return -1; /* cannot have null ptr */
if (!str || *str == 0) {
/* no more chars in str. node_enum from here. */
(void) node_enum(el, ptr, cnt);
return 0;
} else {
/* If match put this char into el->el_keymacro.buf. Recurse */
if (ptr->ch == *str) {
/* match found */
used = ct_visual_char(el->el_keymacro.buf + cnt,
KEY_BUFSIZ - cnt, ptr->ch);
if (used == -1)
return -1; /* ran out of buffer space */
if (ptr->next != NULL)
/* not yet at leaf */
return (node_lookup(el, str + 1, ptr->next,
(size_t)used + cnt));
else {
/* next node is null so key should be complete */
if (str[1] == 0) {
size_t px = cnt + (size_t)used;
el->el_keymacro.buf[px] = '"';
el->el_keymacro.buf[px + 1] = '\0';
keymacro_kprint(el, el->el_keymacro.buf,
&ptr->val, ptr->type);
return 0;
} else
return -1;
/* mismatch -- str still has chars */
}
} else {
/* no match found try sibling */
if (ptr->sibling)
return (node_lookup(el, str, ptr->sibling,
cnt));
else
return -1;
}
}
}
/* node_enum():
* Traverse the node printing the characters it is bound in buffer
*/
private int
node_enum(EditLine *el, keymacro_node_t *ptr, size_t cnt)
{
ssize_t used;
if (cnt >= KEY_BUFSIZ - 5) { /* buffer too small */
el->el_keymacro.buf[++cnt] = '"';
el->el_keymacro.buf[++cnt] = '\0';
(void) fprintf(el->el_errfile,
"Some extended keys too long for internal print buffer");
(void) fprintf(el->el_errfile, " \"" FSTR "...\"\n",
el->el_keymacro.buf);
return 0;
}
if (ptr == NULL) {
#ifdef DEBUG_EDIT
(void) fprintf(el->el_errfile,
"node_enum: BUG!! Null ptr passed\n!");
#endif
return -1;
}
/* put this char at end of str */
used = ct_visual_char(el->el_keymacro.buf + cnt, KEY_BUFSIZ - cnt,
ptr->ch);
if (ptr->next == NULL) {
/* print this key and function */
el->el_keymacro.buf[cnt + (size_t)used ] = '"';
el->el_keymacro.buf[cnt + (size_t)used + 1] = '\0';
keymacro_kprint(el, el->el_keymacro.buf, &ptr->val, ptr->type);
} else
(void) node_enum(el, ptr->next, cnt + (size_t)used);
/* go to sibling if there is one */
if (ptr->sibling)
(void) node_enum(el, ptr->sibling, cnt);
return 0;
}
/* keymacro_kprint():
* Print the specified key and its associated
* function specified by val
*/
protected void
keymacro_kprint(EditLine *el, const Char *key, keymacro_value_t *val, int ntype)
{
el_bindings_t *fp;
char unparsbuf[EL_BUFSIZ];
static const char fmt[] = "%-15s-> %s\n";
if (val != NULL)
switch (ntype) {
case XK_STR:
case XK_EXE:
(void) keymacro__decode_str(val->str, unparsbuf,
sizeof(unparsbuf),
ntype == XK_STR ? "\"\"" : "[]");
(void) fprintf(el->el_outfile, fmt,
ct_encode_string(key, &el->el_scratch), unparsbuf);
break;
case XK_CMD:
for (fp = el->el_map.help; fp->name; fp++)
if (val->cmd == fp->func) {
ct_wcstombs(unparsbuf, fp->name, sizeof(unparsbuf));
unparsbuf[sizeof(unparsbuf) -1] = '\0';
(void) fprintf(el->el_outfile, fmt,
ct_encode_string(key, &el->el_scratch), unparsbuf);
break;
}
#ifdef DEBUG_KEY
if (fp->name == NULL)
(void) fprintf(el->el_outfile,
"BUG! Command not found.\n");
#endif
break;
default:
EL_ABORT((el->el_errfile, "Bad XK_ type %d\n", ntype));
break;
}
else
(void) fprintf(el->el_outfile, fmt, ct_encode_string(key,
&el->el_scratch), "no input");
}
#define ADDC(c) \
if (b < eb) \
*b++ = c; \
else \
b++
/* keymacro__decode_str():
* Make a printable version of the ey
*/
protected size_t
keymacro__decode_str(const Char *str, char *buf, size_t len, const char *sep)
{
char *b = buf, *eb = b + len;
const Char *p;
b = buf;
if (sep[0] != '\0') {
ADDC(sep[0]);
}
if (*str == '\0') {
ADDC('^');
ADDC('@');
goto add_endsep;
}
for (p = str; *p != 0; p++) {
Char dbuf[VISUAL_WIDTH_MAX];
Char *p2 = dbuf;
ssize_t l = ct_visual_char(dbuf, VISUAL_WIDTH_MAX, *p);
while (l-- > 0) {
ssize_t n = ct_encode_char(b, (size_t)(eb - b), *p2++);
if (n == -1) /* ran out of space */
goto add_endsep;
else
b += n;
}
}
add_endsep:
if (sep[0] != '\0' && sep[1] != '\0') {
ADDC(sep[1]);
}
ADDC('\0');
if ((size_t)(b - buf) >= len)
buf[len - 1] = '\0';
return (size_t)(b - buf);
}