| Current Path : /compat/linux/proc/self/root/usr/src/lib/libedit/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //compat/linux/proc/self/root/usr/src/lib/libedit/chared.c |
/*-
* 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: chared.c,v 1.25 2005/08/08 01:41:30 christos Exp $
*/
#if !defined(lint) && !defined(SCCSID)
static char sccsid[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93";
#endif /* not lint && not SCCSID */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/lib/libedit/chared.c 148897 2005-08-09 13:31:59Z stefanf $");
/*
* chared.c: Character editor utilities
*/
#include "sys.h"
#include <stdlib.h>
#include "el.h"
private void ch__clearmacro(EditLine *);
/* value to leave unused in line buffer */
#define EL_LEAVE 2
/* cv_undo():
* Handle state for the vi undo command
*/
protected void
cv_undo(EditLine *el)
{
c_undo_t *vu = &el->el_chared.c_undo;
c_redo_t *r = &el->el_chared.c_redo;
unsigned int size;
/* Save entire line for undo */
size = el->el_line.lastchar - el->el_line.buffer;
vu->len = size;
vu->cursor = el->el_line.cursor - el->el_line.buffer;
memcpy(vu->buf, el->el_line.buffer, size);
/* save command info for redo */
r->count = el->el_state.doingarg ? el->el_state.argument : 0;
r->action = el->el_chared.c_vcmd.action;
r->pos = r->buf;
r->cmd = el->el_state.thiscmd;
r->ch = el->el_state.thisch;
}
/* cv_yank():
* Save yank/delete data for paste
*/
protected void
cv_yank(EditLine *el, const char *ptr, int size)
{
c_kill_t *k = &el->el_chared.c_kill;
memcpy(k->buf, ptr, size +0u);
k->last = k->buf + size;
}
/* c_insert():
* Insert num characters
*/
protected void
c_insert(EditLine *el, int num)
{
char *cp;
if (el->el_line.lastchar + num >= el->el_line.limit) {
if (!ch_enlargebufs(el, num +0u))
return; /* can't go past end of buffer */
}
if (el->el_line.cursor < el->el_line.lastchar) {
/* if I must move chars */
for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--)
cp[num] = *cp;
}
el->el_line.lastchar += num;
}
/* c_delafter():
* Delete num characters after the cursor
*/
protected void
c_delafter(EditLine *el, int num)
{
if (el->el_line.cursor + num > el->el_line.lastchar)
num = el->el_line.lastchar - el->el_line.cursor;
if (el->el_map.current != el->el_map.emacs) {
cv_undo(el);
cv_yank(el, el->el_line.cursor, num);
}
if (num > 0) {
char *cp;
for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
*cp = cp[num];
el->el_line.lastchar -= num;
}
}
/* c_delafter1():
* Delete the character after the cursor, do not yank
*/
protected void
c_delafter1(EditLine *el)
{
char *cp;
for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
*cp = cp[1];
el->el_line.lastchar--;
}
/* c_delbefore():
* Delete num characters before the cursor
*/
protected void
c_delbefore(EditLine *el, int num)
{
if (el->el_line.cursor - num < el->el_line.buffer)
num = el->el_line.cursor - el->el_line.buffer;
if (el->el_map.current != el->el_map.emacs) {
cv_undo(el);
cv_yank(el, el->el_line.cursor - num, num);
}
if (num > 0) {
char *cp;
for (cp = el->el_line.cursor - num;
cp <= el->el_line.lastchar;
cp++)
*cp = cp[num];
el->el_line.lastchar -= num;
}
}
/* c_delbefore1():
* Delete the character before the cursor, do not yank
*/
protected void
c_delbefore1(EditLine *el)
{
char *cp;
for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++)
*cp = cp[1];
el->el_line.lastchar--;
}
/* ce__isword():
* Return if p is part of a word according to emacs
*/
protected int
ce__isword(int p)
{
return (isalnum(p) || strchr("*?_-.[]~=", p) != NULL);
}
/* cv__isword():
* Return if p is part of a word according to vi
*/
protected int
cv__isword(int p)
{
if (isalnum(p) || p == '_')
return 1;
if (isgraph(p))
return 2;
return 0;
}
/* cv__isWord():
* Return if p is part of a big word according to vi
*/
protected int
cv__isWord(int p)
{
return (!isspace(p));
}
/* c__prev_word():
* Find the previous word
*/
protected char *
c__prev_word(char *p, char *low, int n, int (*wtest)(int))
{
p--;
while (n--) {
while ((p >= low) && !(*wtest)((unsigned char) *p))
p--;
while ((p >= low) && (*wtest)((unsigned char) *p))
p--;
}
/* cp now points to one character before the word */
p++;
if (p < low)
p = low;
/* cp now points where we want it */
return (p);
}
/* c__next_word():
* Find the next word
*/
protected char *
c__next_word(char *p, char *high, int n, int (*wtest)(int))
{
while (n--) {
while ((p < high) && !(*wtest)((unsigned char) *p))
p++;
while ((p < high) && (*wtest)((unsigned char) *p))
p++;
}
if (p > high)
p = high;
/* p now points where we want it */
return (p);
}
/* cv_next_word():
* Find the next word vi style
*/
protected char *
cv_next_word(EditLine *el, char *p, char *high, int n, int (*wtest)(int))
{
int test;
while (n--) {
test = (*wtest)((unsigned char) *p);
while ((p < high) && (*wtest)((unsigned char) *p) == test)
p++;
/*
* vi historically deletes with cw only the word preserving the
* trailing whitespace! This is not what 'w' does..
*/
if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT))
while ((p < high) && isspace((unsigned char) *p))
p++;
}
/* p now points where we want it */
if (p > high)
return (high);
else
return (p);
}
/* cv_prev_word():
* Find the previous word vi style
*/
protected char *
cv_prev_word(char *p, char *low, int n, int (*wtest)(int))
{
int test;
p--;
while (n--) {
while ((p > low) && isspace((unsigned char) *p))
p--;
test = (*wtest)((unsigned char) *p);
while ((p >= low) && (*wtest)((unsigned char) *p) == test)
p--;
}
p++;
/* p now points where we want it */
if (p < low)
return (low);
else
return (p);
}
#ifdef notdef
/* c__number():
* Ignore character p points to, return number appearing after that.
* A '$' by itself means a big number; "$-" is for negative; '^' means 1.
* Return p pointing to last char used.
*/
protected char *
c__number(
char *p, /* character position */
int *num, /* Return value */
int dval) /* dval is the number to subtract from like $-3 */
{
int i;
int sign = 1;
if (*++p == '^') {
*num = 1;
return (p);
}
if (*p == '$') {
if (*++p != '-') {
*num = 0x7fffffff; /* Handle $ */
return (--p);
}
sign = -1; /* Handle $- */
++p;
}
for (i = 0; isdigit((unsigned char) *p); i = 10 * i + *p++ - '0')
continue;
*num = (sign < 0 ? dval - i : i);
return (--p);
}
#endif
/* cv_delfini():
* Finish vi delete action
*/
protected void
cv_delfini(EditLine *el)
{
int size;
int action = el->el_chared.c_vcmd.action;
if (action & INSERT)
el->el_map.current = el->el_map.key;
if (el->el_chared.c_vcmd.pos == 0)
/* sanity */
return;
size = el->el_line.cursor - el->el_chared.c_vcmd.pos;
if (size == 0)
size = 1;
el->el_line.cursor = el->el_chared.c_vcmd.pos;
if (action & YANK) {
if (size > 0)
cv_yank(el, el->el_line.cursor, size);
else
cv_yank(el, el->el_line.cursor + size, -size);
} else {
if (size > 0) {
c_delafter(el, size);
re_refresh_cursor(el);
} else {
c_delbefore(el, -size);
el->el_line.cursor += size;
}
}
el->el_chared.c_vcmd.action = NOP;
}
#ifdef notdef
/* ce__endword():
* Go to the end of this word according to emacs
*/
protected char *
ce__endword(char *p, char *high, int n)
{
p++;
while (n--) {
while ((p < high) && isspace((unsigned char) *p))
p++;
while ((p < high) && !isspace((unsigned char) *p))
p++;
}
p--;
return (p);
}
#endif
/* cv__endword():
* Go to the end of this word according to vi
*/
protected char *
cv__endword(char *p, char *high, int n, int (*wtest)(int))
{
int test;
p++;
while (n--) {
while ((p < high) && isspace((unsigned char) *p))
p++;
test = (*wtest)((unsigned char) *p);
while ((p < high) && (*wtest)((unsigned char) *p) == test)
p++;
}
p--;
return (p);
}
/* ch_init():
* Initialize the character editor
*/
protected int
ch_init(EditLine *el)
{
c_macro_t *ma = &el->el_chared.c_macro;
el->el_line.buffer = (char *) el_malloc(EL_BUFSIZ);
if (el->el_line.buffer == NULL)
return (-1);
(void) memset(el->el_line.buffer, 0, EL_BUFSIZ);
el->el_line.cursor = el->el_line.buffer;
el->el_line.lastchar = el->el_line.buffer;
el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE];
el->el_chared.c_undo.buf = (char *) el_malloc(EL_BUFSIZ);
if (el->el_chared.c_undo.buf == NULL)
return (-1);
(void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ);
el->el_chared.c_undo.len = -1;
el->el_chared.c_undo.cursor = 0;
el->el_chared.c_redo.buf = (char *) el_malloc(EL_BUFSIZ);
if (el->el_chared.c_redo.buf == NULL)
return (-1);
el->el_chared.c_redo.pos = el->el_chared.c_redo.buf;
el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ;
el->el_chared.c_redo.cmd = ED_UNASSIGNED;
el->el_chared.c_vcmd.action = NOP;
el->el_chared.c_vcmd.pos = el->el_line.buffer;
el->el_chared.c_kill.buf = (char *) el_malloc(EL_BUFSIZ);
if (el->el_chared.c_kill.buf == NULL)
return (-1);
(void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ);
el->el_chared.c_kill.mark = el->el_line.buffer;
el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
el->el_map.current = el->el_map.key;
el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
el->el_state.doingarg = 0;
el->el_state.metanext = 0;
el->el_state.argument = 1;
el->el_state.lastcmd = ED_UNASSIGNED;
ma->level = -1;
ma->offset = 0;
ma->macro = (char **) el_malloc(EL_MAXMACRO * sizeof(char *));
if (ma->macro == NULL)
return (-1);
return (0);
}
/* ch_reset():
* Reset the character editor
*/
protected void
ch_reset(EditLine *el, int mclear)
{
el->el_line.cursor = el->el_line.buffer;
el->el_line.lastchar = el->el_line.buffer;
el->el_chared.c_undo.len = -1;
el->el_chared.c_undo.cursor = 0;
el->el_chared.c_vcmd.action = NOP;
el->el_chared.c_vcmd.pos = el->el_line.buffer;
el->el_chared.c_kill.mark = el->el_line.buffer;
el->el_map.current = el->el_map.key;
el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
el->el_state.doingarg = 0;
el->el_state.metanext = 0;
el->el_state.argument = 1;
el->el_state.lastcmd = ED_UNASSIGNED;
el->el_history.eventno = 0;
if (mclear)
ch__clearmacro(el);
}
private void
ch__clearmacro(el)
EditLine *el;
{
c_macro_t *ma = &el->el_chared.c_macro;
while (ma->level >= 0)
el_free((ptr_t)ma->macro[ma->level--]);
}
/* ch_enlargebufs():
* Enlarge line buffer to be able to hold twice as much characters.
* Returns 1 if successful, 0 if not.
*/
protected int
ch_enlargebufs(el, addlen)
EditLine *el;
size_t addlen;
{
size_t sz, newsz;
char *newbuffer, *oldbuf, *oldkbuf;
sz = el->el_line.limit - el->el_line.buffer + EL_LEAVE;
newsz = sz * 2;
/*
* If newly required length is longer than current buffer, we need
* to make the buffer big enough to hold both old and new stuff.
*/
if (addlen > sz) {
while(newsz - sz < addlen)
newsz *= 2;
}
/*
* Reallocate line buffer.
*/
newbuffer = el_realloc(el->el_line.buffer, newsz);
if (!newbuffer)
return 0;
/* zero the newly added memory, leave old data in */
(void) memset(&newbuffer[sz], 0, newsz - sz);
oldbuf = el->el_line.buffer;
el->el_line.buffer = newbuffer;
el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf);
el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf);
/* don't set new size until all buffers are enlarged */
el->el_line.limit = &newbuffer[sz - EL_LEAVE];
/*
* Reallocate kill buffer.
*/
newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz);
if (!newbuffer)
return 0;
/* zero the newly added memory, leave old data in */
(void) memset(&newbuffer[sz], 0, newsz - sz);
oldkbuf = el->el_chared.c_kill.buf;
el->el_chared.c_kill.buf = newbuffer;
el->el_chared.c_kill.last = newbuffer +
(el->el_chared.c_kill.last - oldkbuf);
el->el_chared.c_kill.mark = el->el_line.buffer +
(el->el_chared.c_kill.mark - oldbuf);
/*
* Reallocate undo buffer.
*/
newbuffer = el_realloc(el->el_chared.c_undo.buf, newsz);
if (!newbuffer)
return 0;
/* zero the newly added memory, leave old data in */
(void) memset(&newbuffer[sz], 0, newsz - sz);
el->el_chared.c_undo.buf = newbuffer;
newbuffer = el_realloc(el->el_chared.c_redo.buf, newsz);
if (!newbuffer)
return 0;
el->el_chared.c_redo.pos = newbuffer +
(el->el_chared.c_redo.pos - el->el_chared.c_redo.buf);
el->el_chared.c_redo.lim = newbuffer +
(el->el_chared.c_redo.lim - el->el_chared.c_redo.buf);
el->el_chared.c_redo.buf = newbuffer;
if (!hist_enlargebuf(el, sz, newsz))
return 0;
/* Safe to set enlarged buffer size */
el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE];
return 1;
}
/* ch_end():
* Free the data structures used by the editor
*/
protected void
ch_end(EditLine *el)
{
el_free((ptr_t) el->el_line.buffer);
el->el_line.buffer = NULL;
el->el_line.limit = NULL;
el_free((ptr_t) el->el_chared.c_undo.buf);
el->el_chared.c_undo.buf = NULL;
el_free((ptr_t) el->el_chared.c_redo.buf);
el->el_chared.c_redo.buf = NULL;
el->el_chared.c_redo.pos = NULL;
el->el_chared.c_redo.lim = NULL;
el->el_chared.c_redo.cmd = ED_UNASSIGNED;
el_free((ptr_t) el->el_chared.c_kill.buf);
el->el_chared.c_kill.buf = NULL;
ch_reset(el, 1);
el_free((ptr_t) el->el_chared.c_macro.macro);
el->el_chared.c_macro.macro = NULL;
}
/* el_insertstr():
* Insert string at cursorI
*/
public int
el_insertstr(EditLine *el, const char *s)
{
size_t len;
if ((len = strlen(s)) == 0)
return (-1);
if (el->el_line.lastchar + len >= el->el_line.limit) {
if (!ch_enlargebufs(el, len))
return (-1);
}
c_insert(el, (int)len);
while (*s)
*el->el_line.cursor++ = *s++;
return (0);
}
/* el_deletestr():
* Delete num characters before the cursor
*/
public void
el_deletestr(EditLine *el, int n)
{
if (n <= 0)
return;
if (el->el_line.cursor < &el->el_line.buffer[n])
return;
c_delbefore(el, n); /* delete before dot */
el->el_line.cursor -= n;
if (el->el_line.cursor < el->el_line.buffer)
el->el_line.cursor = el->el_line.buffer;
}
/* c_gets():
* Get a string
*/
protected int
c_gets(EditLine *el, char *buf, const char *prompt)
{
char ch;
int len;
char *cp = el->el_line.buffer;
if (prompt) {
len = strlen(prompt);
memcpy(cp, prompt, len + 0u);
cp += len;
}
len = 0;
for (;;) {
el->el_line.cursor = cp;
*cp = ' ';
el->el_line.lastchar = cp + 1;
re_refresh(el);
if (el_getc(el, &ch) != 1) {
ed_end_of_file(el, 0);
len = -1;
break;
}
switch (ch) {
case '\010': /* Delete and backspace */
case '\177':
if (len <= 0) {
len = -1;
break;
}
cp--;
continue;
case '\033': /* ESC */
case '\r': /* Newline */
case '\n':
buf[len] = ch;
break;
default:
if (len >= EL_BUFSIZ - 16)
term_beep(el);
else {
buf[len++] = ch;
*cp++ = ch;
}
continue;
}
break;
}
el->el_line.buffer[0] = '\0';
el->el_line.lastchar = el->el_line.buffer;
el->el_line.cursor = el->el_line.buffer;
return len;
}
/* c_hpos():
* Return the current horizontal position of the cursor
*/
protected int
c_hpos(EditLine *el)
{
char *ptr;
/*
* Find how many characters till the beginning of this line.
*/
if (el->el_line.cursor == el->el_line.buffer)
return (0);
else {
for (ptr = el->el_line.cursor - 1;
ptr >= el->el_line.buffer && *ptr != '\n';
ptr--)
continue;
return (el->el_line.cursor - ptr - 1);
}
}