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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libedit/chared.c	Lines:	33	276	12.0 %
Date:	2017-11-13	Branches:	4	166	2.4 %


/*	$OpenBSD: chared.c,v 1.28 2017/04/12 18:24:37 tb Exp $	*/
/*	$NetBSD: chared.c,v 1.28 2009/12/30 22:37:40 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"

/*
 * chared.c: Character editor utilities
 */
#include <ctype.h>
#include <stdlib.h>
#include <string.h>

#include "el.h"
#include "common.h"
#include "fcns.h"

/* 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;
	size_t size;

	/* Save entire line for undo */
	size = el->el_line.lastchar - el->el_line.buffer;
	vu->len = size;
	vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer);
	(void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf));

	/* 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 wchar_t *ptr, int size)
{
	c_kill_t *k = &el->el_chared.c_kill;

	(void)memcpy(k->buf, ptr, size * sizeof(*k->buf));
	k->last = k->buf + size;
}


/* c_insert():
 *	Insert num characters
 */
protected void
c_insert(EditLine *el, int num)
{
	wchar_t *cp;

	if (el->el_line.lastchar + num >= el->el_line.limit) {
		if (!ch_enlargebufs(el, (size_t)num))
			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 = (int)(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) {
		wchar_t *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)
{
	wchar_t *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 = (int)(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) {
		wchar_t *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)
{
	wchar_t *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(wint_t p)
{
	return iswalnum(p) || wcschr(L"*?_-.[]~=", p) != NULL;
}


/* cv__isword():
 *	Return if p is part of a word according to vi
 */
protected int
cv__isword(wint_t p)
{
	if (iswalnum(p) || p == L'_')
		return 1;
	if (iswgraph(p))
		return 2;
	return 0;
}


/* cv__isWord():
 *	Return if p is part of a big word according to vi
 */
protected int
cv__isWord(wint_t p)
{
	return !iswspace(p);
}


/* c__prev_word():
 *	Find the previous word
 */
protected wchar_t *
c__prev_word(wchar_t *p, wchar_t *low, int n, int (*wtest)(wint_t))
{
	p--;

	while (n--) {
		while ((p >= low) && !(*wtest)(*p))
			p--;
		while ((p >= low) && (*wtest)(*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 wchar_t *
c__next_word(wchar_t *p, wchar_t *high, int n, int (*wtest)(wint_t))
{
	while (n--) {
		while ((p < high) && !(*wtest)(*p))
			p++;
		while ((p < high) && (*wtest)(*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 wchar_t *
cv_next_word(EditLine *el, wchar_t *p, wchar_t *high, int n,
    int (*wtest)(wint_t))
{
	int test;

	while (n--) {
		test = (*wtest)(*p);
		while ((p < high) && (*wtest)(*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) && iswspace(*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 wchar_t *
cv_prev_word(wchar_t *p, wchar_t *low, int n, int (*wtest)(wint_t))
{
	int test;

	p--;
	while (n--) {
		while ((p > low) && iswspace(*p))
			p--;
		test = (*wtest)(*p);
		while ((p >= low) && (*wtest)(*p) == test)
			p--;
	}
	p++;

	/* p now points where we want it */
	if (p < low)
		return low;
	else
		return p;
}


/* 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 = (int)(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;
}


/* cv__endword():
 *	Go to the end of this word according to vi
 */
protected wchar_t *
cv__endword(wchar_t *p, wchar_t *high, int n, int (*wtest)(wint_t))
{
	int test;

	p++;

	while (n--) {
		while ((p < high) && iswspace(*p))
			p++;

		test = (*wtest)(*p);
		while ((p < high) && (*wtest)(*p) == test)
			p++;
	}
	p--;
	return p;
}

/* ch_init():
 *	Initialize the character editor
 */
protected int
ch_init(EditLine *el)
{
	el->el_line.buffer = calloc(EL_BUFSIZ, sizeof(*el->el_line.buffer));
	if (el->el_line.buffer == NULL)
		return -1;
	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 = calloc(EL_BUFSIZ,
	    sizeof(*el->el_chared.c_undo.buf));
	if (el->el_chared.c_undo.buf == NULL)
		return -1;
	el->el_chared.c_undo.len = -1;
	el->el_chared.c_undo.cursor = 0;

	el->el_chared.c_redo.buf = reallocarray(NULL, EL_BUFSIZ,
	    sizeof(*el->el_chared.c_redo.buf));
	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 = calloc(EL_BUFSIZ,
	    sizeof(*el->el_chared.c_kill.buf));
	if (el->el_chared.c_kill.buf == NULL)
		return -1;
	el->el_chared.c_kill.mark = el->el_line.buffer;
	el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
	el->el_chared.c_resizefun = NULL;
	el->el_chared.c_resizearg = NULL;

	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;

	return 0;
}

/* ch_reset():
 *	Reset the character editor
 */
protected void
ch_reset(EditLine *el)
{
	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;
}

/* 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(EditLine *el, size_t addlen)
{
	size_t sz, newsz;
	wchar_t *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 = recallocarray(el->el_line.buffer, sz, newsz,
	    sizeof(*newbuffer));
	if (!newbuffer)
		return 0;

	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 = recallocarray(el->el_chared.c_kill.buf, sz, newsz,
	    sizeof(*newbuffer));
	if (!newbuffer)
		return 0;

	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 = recallocarray(el->el_chared.c_undo.buf, sz, newsz,
	    sizeof(*newbuffer));
	if (!newbuffer)
		return 0;
	el->el_chared.c_undo.buf = newbuffer;

	newbuffer = reallocarray(el->el_chared.c_redo.buf,
	    newsz, sizeof(*newbuffer));
	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];
	if (el->el_chared.c_resizefun)
		(*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg);
	return 1;
}

/* ch_end():
 *	Free the data structures used by the editor
 */
protected void
ch_end(EditLine *el)
{
	free(el->el_line.buffer);
	el->el_line.buffer = NULL;
	el->el_line.limit = NULL;
	free(el->el_chared.c_undo.buf);
	el->el_chared.c_undo.buf = NULL;
	free(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;
	free(el->el_chared.c_kill.buf);
	el->el_chared.c_kill.buf = NULL;
	ch_reset(el);
}


/* el_insertstr():
 *	Insert string at cursorI
 */
int
el_winsertstr(EditLine *el, const wchar_t *s)
{
	size_t len;

	if ((len = wcslen(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
 */
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, wchar_t *buf, const wchar_t *prompt)
{
	ssize_t len;
	wchar_t *cp = el->el_line.buffer, ch;

	if (prompt) {
		len = wcslen(prompt);
		(void)memcpy(cp, prompt, len * sizeof(*cp));
		cp += len;
	}
	len = 0;

	for (;;) {
		el->el_line.cursor = cp;
		*cp = ' ';
		el->el_line.lastchar = cp + 1;
		re_refresh(el);

		if (el_wgetc(el, &ch) != 1) {
			ed_end_of_file(el, 0);
			len = -1;
			break;
		}

		switch (ch) {

		case L'\b':	/* Delete and backspace */
		case 0177:
			if (len == 0) {
				len = -1;
				break;
			}
			len--;
			cp--;
			continue;

		case 0033:	/* ESC */
		case L'\r':	/* Newline */
		case L'\n':
			buf[len] = ch;
			break;

		default:
			if (len >= EL_BUFSIZ - 16)
				terminal_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 (int)len;
}


/* c_hpos():
 *	Return the current horizontal position of the cursor
 */
protected int
c_hpos(EditLine *el)
{
	wchar_t *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 (int)(el->el_line.cursor - ptr - 1);
	}
}

protected int
ch_resizefun(EditLine *el, el_zfunc_t f, void *a)
{
	el->el_chared.c_resizefun = f;
	el->el_chared.c_resizearg = a;
	return 0;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: chared.c,v 1.28 2017/04/12 18:24:37 tb Exp $ */
2			/* $NetBSD: chared.c,v 1.28 2009/12/30 22:37:40 christos Exp $ */
3
4			/*-
5			* Copyright (c) 1992, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* This code is derived from software contributed to Berkeley by
9			* Christos Zoulas of Cornell University.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36			#include "config.h"
37
38			/*
39			* chared.c: Character editor utilities
40			*/
41			#include <ctype.h>
42			#include <stdlib.h>
43			#include <string.h>
44
45			#include "el.h"
46			#include "common.h"
47			#include "fcns.h"
48
49			/* value to leave unused in line buffer */
50			#define EL_LEAVE 2
51
52			/* cv_undo():
53			* Handle state for the vi undo command
54			*/
55			protected void
56			cv_undo(EditLine *el)
57			{
58			c_undo_t *vu = &el->el_chared.c_undo;
59			c_redo_t *r = &el->el_chared.c_redo;
60			size_t size;
61
62			/* Save entire line for undo */
63			size = el->el_line.lastchar - el->el_line.buffer;
64			vu->len = size;
65			vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer);
66			(void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf));
67
68			/* save command info for redo */
69			r->count = el->el_state.doingarg ? el->el_state.argument : 0;
70			r->action = el->el_chared.c_vcmd.action;
71			r->pos = r->buf;
72			r->cmd = el->el_state.thiscmd;
73			r->ch = el->el_state.thisch;
74			}
75
76			/* cv_yank():
77			* Save yank/delete data for paste
78			*/
79			protected void
80			cv_yank(EditLine el, const wchar_t ptr, int size)
81			{
82			c_kill_t *k = &el->el_chared.c_kill;
83
84			(void)memcpy(k->buf, ptr, size * sizeof(*k->buf));
85			k->last = k->buf + size;
86			}
87
88
89			/* c_insert():
90			* Insert num characters
91			*/
92			protected void
93			c_insert(EditLine *el, int num)
94			{
95			wchar_t *cp;
96
97			if (el->el_line.lastchar + num >= el->el_line.limit) {
98			if (!ch_enlargebufs(el, (size_t)num))
99			return; /* can't go past end of buffer */
100			}
101
102			if (el->el_line.cursor < el->el_line.lastchar) {
103			/* if I must move chars */
104			for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--)
105			cp[num] = *cp;
106			}
107			el->el_line.lastchar += num;
108			}
109
110
111			/* c_delafter():
112			* Delete num characters after the cursor
113			*/
114			protected void
115			c_delafter(EditLine *el, int num)
116			{
117
118			if (el->el_line.cursor + num > el->el_line.lastchar)
119			num = (int)(el->el_line.lastchar - el->el_line.cursor);
120
121			if (el->el_map.current != el->el_map.emacs) {
122			cv_undo(el);
123			cv_yank(el, el->el_line.cursor, num);
124			}
125
126			if (num > 0) {
127			wchar_t *cp;
128
129			for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
130			*cp = cp[num];
131
132			el->el_line.lastchar -= num;
133			}
134			}
135
136
137			/* c_delafter1():
138			* Delete the character after the cursor, do not yank
139			*/
140			protected void
141			c_delafter1(EditLine *el)
142			{
143			wchar_t *cp;
144
145			for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
146			*cp = cp[1];
147
148			el->el_line.lastchar--;
149			}
150
151
152			/* c_delbefore():
153			* Delete num characters before the cursor
154			*/
155			protected void
156			c_delbefore(EditLine *el, int num)
157			{
158
159			if (el->el_line.cursor - num < el->el_line.buffer)
160			num = (int)(el->el_line.cursor - el->el_line.buffer);
161
162			if (el->el_map.current != el->el_map.emacs) {
163			cv_undo(el);
164			cv_yank(el, el->el_line.cursor - num, num);
165			}
166
167			if (num > 0) {
168			wchar_t *cp;
169
170			for (cp = el->el_line.cursor - num;
171			cp <= el->el_line.lastchar;
172			cp++)
173			*cp = cp[num];
174
175			el->el_line.lastchar -= num;
176			}
177			}
178
179
180			/* c_delbefore1():
181			* Delete the character before the cursor, do not yank
182			*/
183			protected void
184			c_delbefore1(EditLine *el)
185			{
186			wchar_t *cp;
187
188			for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++)
189			*cp = cp[1];
190
191			el->el_line.lastchar--;
192			}
193
194
195			/* ce__isword():
196			* Return if p is part of a word according to emacs
197			*/
198			protected int
199			ce__isword(wint_t p)
200			{
201			return iswalnum(p) \|\| wcschr(L"*?_-.[]~=", p) != NULL;
202			}
203
204
205			/* cv__isword():
206			* Return if p is part of a word according to vi
207			*/
208			protected int
209			cv__isword(wint_t p)
210			{
211			if (iswalnum(p) \|\| p == L'_')
212			return 1;
213			if (iswgraph(p))
214			return 2;
215			return 0;
216			}
217
218
219			/* cv__isWord():
220			* Return if p is part of a big word according to vi
221			*/
222			protected int
223			cv__isWord(wint_t p)
224			{
225			return !iswspace(p);
226			}
227
228
229			/* c__prev_word():
230			* Find the previous word
231			*/
232			protected wchar_t *
233			c__prev_word(wchar_t p, wchar_t low, int n, int (*wtest)(wint_t))
234			{
235			p--;
236
237			while (n--) {
238			while ((p >= low) && !(wtest)(p))
239			p--;
240			while ((p >= low) && (wtest)(p))
241			p--;
242			}
243
244			/* cp now points to one character before the word */
245			p++;
246			if (p < low)
247			p = low;
248			/* cp now points where we want it */
249			return p;
250			}
251
252
253			/* c__next_word():
254			* Find the next word
255			*/
256			protected wchar_t *
257			c__next_word(wchar_t p, wchar_t high, int n, int (*wtest)(wint_t))
258			{
259			while (n--) {
260			while ((p < high) && !(wtest)(p))
261			p++;
262			while ((p < high) && (wtest)(p))
263			p++;
264			}
265			if (p > high)
266			p = high;
267			/* p now points where we want it */
268			return p;
269			}
270
271			/* cv_next_word():
272			* Find the next word vi style
273			*/
274			protected wchar_t *
275			cv_next_word(EditLine el, wchar_t p, wchar_t *high, int n,
276			int (*wtest)(wint_t))
277			{
278			int test;
279
280			while (n--) {
281			test = (wtest)(p);
282			while ((p < high) && (wtest)(p) == test)
283			p++;
284			/*
285			* vi historically deletes with cw only the word preserving the
286			* trailing whitespace! This is not what 'w' does..
287			*/
288			if (n \|\| el->el_chared.c_vcmd.action != (DELETE\|INSERT))
289			while ((p < high) && iswspace(*p))
290			p++;
291			}
292
293			/* p now points where we want it */
294			if (p > high)
295			return high;
296			else
297			return p;
298			}
299
300
301			/* cv_prev_word():
302			* Find the previous word vi style
303			*/
304			protected wchar_t *
305			cv_prev_word(wchar_t p, wchar_t low, int n, int (*wtest)(wint_t))
306			{
307			int test;
308
309			p--;
310			while (n--) {
311			while ((p > low) && iswspace(*p))
312			p--;
313			test = (wtest)(p);
314			while ((p >= low) && (wtest)(p) == test)
315			p--;
316			}
317			p++;
318
319			/* p now points where we want it */
320			if (p < low)
321			return low;
322			else
323			return p;
324			}
325
326
327			/* cv_delfini():
328			* Finish vi delete action
329			*/
330			protected void
331			cv_delfini(EditLine *el)
332			{
333			int size;
334			int action = el->el_chared.c_vcmd.action;
335
336			if (action & INSERT)
337			el->el_map.current = el->el_map.key;
338
339			if (el->el_chared.c_vcmd.pos == 0)
340			/* sanity */
341			return;
342
343			size = (int)(el->el_line.cursor - el->el_chared.c_vcmd.pos);
344			if (size == 0)
345			size = 1;
346			el->el_line.cursor = el->el_chared.c_vcmd.pos;
347			if (action & YANK) {
348			if (size > 0)
349			cv_yank(el, el->el_line.cursor, size);
350			else
351			cv_yank(el, el->el_line.cursor + size, -size);
352			} else {
353			if (size > 0) {
354			c_delafter(el, size);
355			re_refresh_cursor(el);
356			} else {
357			c_delbefore(el, -size);
358			el->el_line.cursor += size;
359			}
360			}
361			el->el_chared.c_vcmd.action = NOP;
362			}
363
364
365			/* cv__endword():
366			* Go to the end of this word according to vi
367			*/
368			protected wchar_t *
369			cv__endword(wchar_t p, wchar_t high, int n, int (*wtest)(wint_t))
370			{
371			int test;
372
373			p++;
374
375			while (n--) {
376			while ((p < high) && iswspace(*p))
377			p++;
378
379			test = (wtest)(p);
380			while ((p < high) && (wtest)(p) == test)
381			p++;
382			}
383			p--;
384			return p;
385			}
386
387			/* ch_init():
388			* Initialize the character editor
389			*/
390			protected int
391			ch_init(EditLine *el)
392			{
393		6	el->el_line.buffer = calloc(EL_BUFSIZ, sizeof(*el->el_line.buffer));
394	✗✓	3	if (el->el_line.buffer == NULL)
395			return -1;
396		3	el->el_line.cursor = el->el_line.buffer;
397		3	el->el_line.lastchar = el->el_line.buffer;
398		3	el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE];
399
400		3	el->el_chared.c_undo.buf = calloc(EL_BUFSIZ,
401			sizeof(*el->el_chared.c_undo.buf));
402	✗✓	3	if (el->el_chared.c_undo.buf == NULL)
403			return -1;
404		3	el->el_chared.c_undo.len = -1;
405		3	el->el_chared.c_undo.cursor = 0;
406
407		3	el->el_chared.c_redo.buf = reallocarray(NULL, EL_BUFSIZ,
408			sizeof(*el->el_chared.c_redo.buf));
409	✗✓	3	if (el->el_chared.c_redo.buf == NULL)
410			return -1;
411		3	el->el_chared.c_redo.pos = el->el_chared.c_redo.buf;
412		3	el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ;
413		3	el->el_chared.c_redo.cmd = ED_UNASSIGNED;
414
415		3	el->el_chared.c_vcmd.action = NOP;
416		3	el->el_chared.c_vcmd.pos = el->el_line.buffer;
417
418		3	el->el_chared.c_kill.buf = calloc(EL_BUFSIZ,
419			sizeof(*el->el_chared.c_kill.buf));
420	✗✓	3	if (el->el_chared.c_kill.buf == NULL)
421			return -1;
422		3	el->el_chared.c_kill.mark = el->el_line.buffer;
423		3	el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
424		3	el->el_chared.c_resizefun = NULL;
425		3	el->el_chared.c_resizearg = NULL;
426
427		3	el->el_map.current = el->el_map.key;
428
429		3	el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
430		3	el->el_state.doingarg = 0;
431		3	el->el_state.metanext = 0;
432		3	el->el_state.argument = 1;
433		3	el->el_state.lastcmd = ED_UNASSIGNED;
434
435		3	return 0;
436		3	}
437
438			/* ch_reset():
439			* Reset the character editor
440			*/
441			protected void
442			ch_reset(EditLine *el)
443			{
444			el->el_line.cursor = el->el_line.buffer;
445			el->el_line.lastchar = el->el_line.buffer;
446
447			el->el_chared.c_undo.len = -1;
448			el->el_chared.c_undo.cursor = 0;
449
450			el->el_chared.c_vcmd.action = NOP;
451			el->el_chared.c_vcmd.pos = el->el_line.buffer;
452
453			el->el_chared.c_kill.mark = el->el_line.buffer;
454
455			el->el_map.current = el->el_map.key;
456
457			el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
458			el->el_state.doingarg = 0;
459			el->el_state.metanext = 0;
460			el->el_state.argument = 1;
461			el->el_state.lastcmd = ED_UNASSIGNED;
462
463			el->el_history.eventno = 0;
464			}
465
466			/* ch_enlargebufs():
467			* Enlarge line buffer to be able to hold twice as much characters.
468			* Returns 1 if successful, 0 if not.
469			*/
470			protected int
471			ch_enlargebufs(EditLine *el, size_t addlen)
472			{
473			size_t sz, newsz;
474			wchar_t newbuffer, oldbuf, *oldkbuf;
475
476			sz = el->el_line.limit - el->el_line.buffer + EL_LEAVE;
477			newsz = sz * 2;
478			/*
479			* If newly required length is longer than current buffer, we need
480			* to make the buffer big enough to hold both old and new stuff.
481			*/
482			if (addlen > sz) {
483			while(newsz - sz < addlen)
484			newsz *= 2;
485			}
486
487			/*
488			* Reallocate line buffer.
489			*/
490			newbuffer = recallocarray(el->el_line.buffer, sz, newsz,
491			sizeof(*newbuffer));
492			if (!newbuffer)
493			return 0;
494
495			oldbuf = el->el_line.buffer;
496
497			el->el_line.buffer = newbuffer;
498			el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf);
499			el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf);
500			/* don't set new size until all buffers are enlarged */
501			el->el_line.limit = &newbuffer[sz - EL_LEAVE];
502
503			/*
504			* Reallocate kill buffer.
505			*/
506			newbuffer = recallocarray(el->el_chared.c_kill.buf, sz, newsz,
507			sizeof(*newbuffer));
508			if (!newbuffer)
509			return 0;
510
511			oldkbuf = el->el_chared.c_kill.buf;
512
513			el->el_chared.c_kill.buf = newbuffer;
514			el->el_chared.c_kill.last = newbuffer +
515			(el->el_chared.c_kill.last - oldkbuf);
516			el->el_chared.c_kill.mark = el->el_line.buffer +
517			(el->el_chared.c_kill.mark - oldbuf);
518
519			/*
520			* Reallocate undo buffer.
521			*/
522			newbuffer = recallocarray(el->el_chared.c_undo.buf, sz, newsz,
523			sizeof(*newbuffer));
524			if (!newbuffer)
525			return 0;
526			el->el_chared.c_undo.buf = newbuffer;
527
528			newbuffer = reallocarray(el->el_chared.c_redo.buf,
529			newsz, sizeof(*newbuffer));
530			if (!newbuffer)
531			return 0;
532			el->el_chared.c_redo.pos = newbuffer +
533			(el->el_chared.c_redo.pos - el->el_chared.c_redo.buf);
534			el->el_chared.c_redo.lim = newbuffer +
535			(el->el_chared.c_redo.lim - el->el_chared.c_redo.buf);
536			el->el_chared.c_redo.buf = newbuffer;
537
538			if (!hist_enlargebuf(el, sz, newsz))
539			return 0;
540
541			/* Safe to set enlarged buffer size */
542			el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE];
543			if (el->el_chared.c_resizefun)
544			(*el->el_chared.c_resizefun)(el, el->el_chared.c_resizearg);
545			return 1;
546			}
547
548			/* ch_end():
549			* Free the data structures used by the editor
550			*/
551			protected void
552			ch_end(EditLine *el)
553			{
554			free(el->el_line.buffer);
555			el->el_line.buffer = NULL;
556			el->el_line.limit = NULL;
557			free(el->el_chared.c_undo.buf);
558			el->el_chared.c_undo.buf = NULL;
559			free(el->el_chared.c_redo.buf);
560			el->el_chared.c_redo.buf = NULL;
561			el->el_chared.c_redo.pos = NULL;
562			el->el_chared.c_redo.lim = NULL;
563			el->el_chared.c_redo.cmd = ED_UNASSIGNED;
564			free(el->el_chared.c_kill.buf);
565			el->el_chared.c_kill.buf = NULL;
566			ch_reset(el);
567			}
568
569
570			/* el_insertstr():
571			* Insert string at cursorI
572			*/
573			int
574			el_winsertstr(EditLine el, const wchar_t s)
575			{
576			size_t len;
577
578			if ((len = wcslen(s)) == 0)
579			return -1;
580			if (el->el_line.lastchar + len >= el->el_line.limit) {
581			if (!ch_enlargebufs(el, len))
582			return -1;
583			}
584
585			c_insert(el, (int)len);
586			while (*s)
587			el->el_line.cursor++ = s++;
588			return 0;
589			}
590
591
592			/* el_deletestr():
593			* Delete num characters before the cursor
594			*/
595			void
596			el_deletestr(EditLine *el, int n)
597			{
598			if (n <= 0)
599			return;
600
601			if (el->el_line.cursor < &el->el_line.buffer[n])
602			return;
603
604			c_delbefore(el, n); /* delete before dot */
605			el->el_line.cursor -= n;
606			if (el->el_line.cursor < el->el_line.buffer)
607			el->el_line.cursor = el->el_line.buffer;
608			}
609
610			/* c_gets():
611			* Get a string
612			*/
613			protected int
614			c_gets(EditLine el, wchar_t buf, const wchar_t *prompt)
615			{
616			ssize_t len;
617			wchar_t *cp = el->el_line.buffer, ch;
618
619			if (prompt) {
620			len = wcslen(prompt);
621			(void)memcpy(cp, prompt, len * sizeof(*cp));
622			cp += len;
623			}
624			len = 0;
625
626			for (;;) {
627			el->el_line.cursor = cp;
628			*cp = ' ';
629			el->el_line.lastchar = cp + 1;
630			re_refresh(el);
631
632			if (el_wgetc(el, &ch) != 1) {
633			ed_end_of_file(el, 0);
634			len = -1;
635			break;
636			}
637
638			switch (ch) {
639
640			case L'\b': /* Delete and backspace */
641			case 0177:
642			if (len == 0) {
643			len = -1;
644			break;
645			}
646			len--;
647			cp--;
648			continue;
649
650			case 0033: /* ESC */
651			case L'\r': /* Newline */
652			case L'\n':
653			buf[len] = ch;
654			break;
655
656			default:
657			if (len >= EL_BUFSIZ - 16)
658			terminal_beep(el);
659			else {
660			buf[len++] = ch;
661			*cp++ = ch;
662			}
663			continue;
664			}
665			break;
666			}
667
668			el->el_line.buffer[0] = '\0';
669			el->el_line.lastchar = el->el_line.buffer;
670			el->el_line.cursor = el->el_line.buffer;
671			return (int)len;
672			}
673
674
675			/* c_hpos():
676			* Return the current horizontal position of the cursor
677			*/
678			protected int
679			c_hpos(EditLine *el)
680			{
681			wchar_t *ptr;
682
683			/*
684			* Find how many characters till the beginning of this line.
685			*/
686			if (el->el_line.cursor == el->el_line.buffer)
687			return 0;
688			else {
689			for (ptr = el->el_line.cursor - 1;
690			ptr >= el->el_line.buffer && *ptr != '\n';
691			ptr--)
692			continue;
693			return (int)(el->el_line.cursor - ptr - 1);
694			}
695			}
696
697			protected int
698			ch_resizefun(EditLine el, el_zfunc_t f, void a)
699			{
700		6	el->el_chared.c_resizefun = f;
701		3	el->el_chared.c_resizearg = a;
702		3	return 0;
703			}