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NetBSD/lib/libcurses/addbytes.c

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/* $NetBSD: addbytes.c,v 1.39 2011/07/01 01:19:33 joerg Exp $ */
/*
* Copyright (c) 1987, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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 <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)addbytes.c 8.4 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: addbytes.c,v 1.39 2011/07/01 01:19:33 joerg Exp $");
#endif
#endif /* not lint */
#include <stdlib.h>
#include <string.h>
#include "curses.h"
#include "curses_private.h"
#ifdef DEBUG
#include <assert.h>
#endif
#define SYNCH_IN {y = win->cury; x = win->curx;}
#define SYNCH_OUT {win->cury = y; win->curx = x;}
#define PSYNCH_IN {*y = win->cury; *x = win->curx;}
#define PSYNCH_OUT {win->cury = *y; win->curx = *x;}
#ifndef _CURSES_USE_MACROS
/*
* addbytes --
* Add the character to the current position in stdscr.
*/
int
addbytes(const char *bytes, int count)
{
return __waddbytes(stdscr, bytes, count, 0);
}
/*
* waddbytes --
* Add the character to the current position in the given window.
*/
int
waddbytes(WINDOW *win, const char *bytes, int count)
{
return __waddbytes(win, bytes, count, 0);
}
/*
* mvaddbytes --
* Add the characters to stdscr at the location given.
*/
int
mvaddbytes(int y, int x, const char *bytes, int count)
{
return mvwaddbytes(stdscr, y, x, bytes, count);
}
/*
* mvwaddbytes --
* Add the characters to the given window at the location given.
*/
int
mvwaddbytes(WINDOW *win, int y, int x, const char *bytes, int count)
{
if (wmove(win, y, x) == ERR)
return ERR;
return __waddbytes(win, bytes, count, 0);
}
#endif
/*
* waddbytes --
* Add the character to the current position in the given window.
*/
int
__waddbytes(WINDOW *win, const char *bytes, int count, attr_t attr)
{
int x, y, err;
__LINE *lp;
#ifdef HAVE_WCHAR
int n;
cchar_t cc;
wchar_t wc;
mbstate_t st;
#else
int c;
#endif
#ifdef DEBUG
int i;
for (i = 0; i < win->maxy; i++) {
assert(win->alines[i]->sentinel == SENTINEL_VALUE);
}
__CTRACE(__CTRACE_INPUT, "ADDBYTES: add %d bytes\n", count);
#endif
err = OK;
SYNCH_IN;
lp = win->alines[y];
#ifdef HAVE_WCHAR
(void)memset(&st, 0, sizeof(st));
#endif
while (count > 0) {
#ifndef HAVE_WCHAR
c = *bytes++;
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "ADDBYTES('%c', %x) at (%d, %d)\n",
c, attr, y, x);
#endif
err = _cursesi_addbyte(win, &lp, &y, &x, c, attr);
count--;
#else
/*
* For wide-character support only, try and convert the
* given string into a wide character - we do this because
* this is how ncurses behaves (not that I think this is
* actually the correct thing to do but if we don't do it
* a lot of things that rely on this behaviour will break
* and we will be blamed). If the conversion succeeds
* then we eat the n characters used to make the wide char
* from the string.
*/
n = (int)mbrtowc(&wc, bytes, (size_t)count, &st);
if (n < 0) {
/* not a valid conversion just eat a char */
wc = *bytes;
n = 1;
(void)memset(&st, 0, sizeof(st));
} else if (wc == 0) {
break;
}
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"ADDBYTES WIDE(0x%x [%s], %x) at (%d, %d), ate %d bytes\n",
(unsigned) wc, unctrl((unsigned) wc), attr, y, x, n);
#endif
cc.vals[0] = wc;
cc.elements = 1;
cc.attributes = attr;
err = _cursesi_addwchar(win, &lp, &y, &x, &cc);
bytes += n;
count -= n;
#endif
}
SYNCH_OUT;
#ifdef DEBUG
for (i = 0; i < win->maxy; i++) {
assert(win->alines[i]->sentinel == SENTINEL_VALUE);
}
#endif
return (err);
}
/*
* _cursesi_addbyte -
* Internal function to add a byte and update the row and column
* positions as appropriate. This function is only used in the narrow
* character version of curses.
*/
int
_cursesi_addbyte(WINDOW *win, __LINE **lp, int *y, int *x, int c,
attr_t attr)
{
static char blanks[] = " ";
int newx;
attr_t attributes;
switch (c) {
case '\t':
PSYNCH_OUT;
if (waddbytes(win, blanks, 8 - (*x % 8)) == ERR)
return (ERR);
PSYNCH_IN;
break;
default:
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "ADDBYTES(%p, %d, %d)\n",
win, *y, *x);
#endif
if ((*lp)->flags & __ISPASTEOL) {
new_line:
*x = 0;
(*lp)->flags &= ~__ISPASTEOL;
if (*y == win->scr_b) {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"ADDBYTES - on bottom "
"of scrolling region\n");
#endif
if (!(win->flags & __SCROLLOK))
return ERR;
PSYNCH_OUT;
scroll(win);
PSYNCH_IN;
} else {
(*y)++;
}
*lp = win->alines[*y];
if (c == '\n')
break;
}
attributes = (win->wattr | attr) &
(__ATTRIBUTES & ~__COLOR);
if (attr & __COLOR)
attributes |= attr & __COLOR;
else if (win->wattr & __COLOR)
attributes |= win->wattr & __COLOR;
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"ADDBYTES: 1: y = %d, x = %d, firstch = %d, "
"lastch = %d\n",
*y, *x, *win->alines[*y]->firstchp,
*win->alines[*y]->lastchp);
#endif
/*
* Always update the change pointers. Otherwise,
* we could end up not displaying 'blank' characters
* when overlapping windows are displayed.
*/
newx = *x + win->ch_off;
(*lp)->flags |= __ISDIRTY;
/*
* firstchp/lastchp are shared between
* parent window and sub-window.
*/
if (newx < *(*lp)->firstchp)
*(*lp)->firstchp = newx;
if (newx > *(*lp)->lastchp)
*(*lp)->lastchp = newx;
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"ADDBYTES: change gives f/l: %d/%d [%d/%d]\n",
*(*lp)->firstchp, *(*lp)->lastchp,
*(*lp)->firstchp - win->ch_off,
*(*lp)->lastchp - win->ch_off);
#endif
if (win->bch != ' ' && c == ' ')
(*lp)->line[*x].ch = win->bch;
else
(*lp)->line[*x].ch = c;
if (attributes & __COLOR)
(*lp)->line[*x].attr =
attributes | (win->battr & ~__COLOR);
else
(*lp)->line[*x].attr = attributes | win->battr;
if (*x == win->maxx - 1)
(*lp)->flags |= __ISPASTEOL;
else
(*x)++;
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"ADDBYTES: 2: y = %d, x = %d, firstch = %d, "
"lastch = %d\n",
*y, *x, *win->alines[*y]->firstchp,
*win->alines[*y]->lastchp);
#endif
break;
case '\n':
PSYNCH_OUT;
wclrtoeol(win);
PSYNCH_IN;
goto new_line;
case '\r':
*x = 0;
break;
case '\b':
if (--(*x) < 0)
*x = 0;
break;
}
return (OK);
}
/*
* _cursesi_addwchar -
* Internal function to add a wide character and update the row
* and column positions.
*/
int
_cursesi_addwchar(WINDOW *win, __LINE **lnp, int *y, int *x,
const cchar_t *wch)
{
#ifndef HAVE_WCHAR
return (ERR);
#else
int sx = 0, ex = 0, cw = 0, i = 0, newx = 0;
__LDATA *lp = &win->alines[*y]->line[*x], *tp = NULL;
nschar_t *np = NULL;
cchar_t cc;
attr_t attributes;
/* special characters handling */
switch (wch->vals[0]) {
case L'\b':
if (--*x < 0)
*x = 0;
win->curx = *x;
return OK;
case L'\r':
*x = 0;
return OK;
case L'\n':
wclrtoeol(win);
PSYNCH_IN;
*x = 0;
(*lnp)->flags &= ~__ISPASTEOL;
if (*y == win->scr_b) {
if (!(win->flags & __SCROLLOK))
return ERR;
PSYNCH_OUT;
scroll(win);
PSYNCH_IN;
} else {
(*y)++;
}
PSYNCH_OUT;
return OK;
case L'\t':
cc.vals[0] = L' ';
cc.elements = 1;
cc.attributes = win->wattr;
for (i = 0; i < 8 - (*x % 8); i++) {
if (wadd_wch(win, &cc) == ERR)
return ERR;
}
return OK;
}
/* check for non-spacing character */
if (!wcwidth(wch->vals[0])) {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"_cursesi_addwchar: char '%c' is non-spacing\n",
wch->vals[0]);
#endif /* DEBUG */
cw = WCOL(*lp);
if (cw < 0) {
lp += cw;
*x += cw;
}
for (i = 0; i < wch->elements; i++) {
if (!(np = (nschar_t *) malloc(sizeof(nschar_t))))
return ERR;;
np->ch = wch->vals[i];
np->next = lp->nsp;
lp->nsp = np;
}
(*lnp)->flags |= __ISDIRTY;
newx = *x + win->ch_off;
if (newx < *(*lnp)->firstchp)
*(*lnp)->firstchp = newx;
if (newx > *(*lnp)->lastchp)
*(*lnp)->lastchp = newx;
__touchline(win, *y, *x, *x);
return OK;
}
/* check for new line first */
if ((*lnp)->flags & __ISPASTEOL) {
*x = 0;
(*lnp)->flags &= ~__ISPASTEOL;
if (*y == win->scr_b) {
if (!(win->flags & __SCROLLOK))
return ERR;
PSYNCH_OUT;
scroll(win);
PSYNCH_IN;
} else {
(*y)++;
}
(*lnp) = win->alines[*y];
lp = &win->alines[*y]->line[*x];
}
/* clear out the current character */
cw = WCOL(*lp);
if (cw >= 0) {
sx = *x;
} else {
for (sx = *x - 1; sx >= max(*x + cw, 0); sx--) {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"_cursesi_addwchar: clear current char (%d,%d)\n",
*y, sx);
#endif /* DEBUG */
tp = &win->alines[*y]->line[sx];
tp->ch = (wchar_t) btowc((int) win->bch);
if (_cursesi_copy_nsp(win->bnsp, tp) == ERR)
return ERR;
tp->attr = win->battr;
SET_WCOL(*tp, 1);
}
sx = *x + cw;
(*lnp)->flags |= __ISDIRTY;
newx = sx + win->ch_off;
if (newx < *(*lnp)->firstchp)
*(*lnp)->firstchp = newx;
}
/* check for enough space before the end of line */
cw = wcwidth(wch->vals[0]);
if (cw < 0)
cw = 1;
if (cw > win->maxx - *x) {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"_cursesi_addwchar: clear EOL (%d,%d)\n",
*y, *x);
#endif /* DEBUG */
(*lnp)->flags |= __ISDIRTY;
newx = *x + win->ch_off;
if (newx < *(*lnp)->firstchp)
*(*lnp)->firstchp = newx;
for (tp = lp; *x < win->maxx; tp++, (*x)++) {
tp->ch = (wchar_t) btowc((int) win->bch);
if (_cursesi_copy_nsp(win->bnsp, tp) == ERR)
return ERR;
tp->attr = win->battr;
SET_WCOL(*tp, 1);
}
newx = win->maxx - 1 + win->ch_off;
if (newx > *(*lnp)->lastchp)
*(*lnp)->lastchp = newx;
__touchline(win, *y, sx, (int) win->maxx - 1);
sx = *x = 0;
if (*y == win->scr_b) {
if (!(win->flags & __SCROLLOK))
return ERR;
PSYNCH_OUT;
scroll(win);
PSYNCH_IN;
} else {
(*y)++;
}
lp = &win->alines[*y]->line[0];
(*lnp) = win->alines[*y];
}
win->cury = *y;
/* add spacing character */
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"_cursesi_addwchar: add character (%d,%d) 0x%x\n",
*y, *x, wch->vals[0]);
#endif /* DEBUG */
(*lnp)->flags |= __ISDIRTY;
newx = *x + win->ch_off;
if (newx < *(*lnp)->firstchp)
*(*lnp)->firstchp = newx;
if (lp->nsp) {
__cursesi_free_nsp(lp->nsp);
lp->nsp = NULL;
}
lp->ch = wch->vals[0];
attributes = (win->wattr | wch->attributes)
& (WA_ATTRIBUTES & ~__COLOR);
if (wch->attributes & __COLOR)
attributes |= wch->attributes & __COLOR;
else if (win->wattr & __COLOR)
attributes |= win->wattr & __COLOR;
if (attributes & __COLOR)
lp->attr = attributes | (win->battr & ~__COLOR);
else
lp->attr = attributes | win->battr;
SET_WCOL(*lp, cw);
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"_cursesi_addwchar: add spacing char 0x%x, attr 0x%x\n",
lp->ch, lp->attr);
#endif /* DEBUG */
if (wch->elements > 1) {
for (i = 1; i < wch->elements; i++) {
np = (nschar_t *)malloc(sizeof(nschar_t));
if (!np)
return ERR;;
np->ch = wch->vals[i];
np->next = lp->nsp;
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"_cursesi_addwchar: add non-spacing char 0x%x\n", np->ch);
#endif /* DEBUG */
lp->nsp = np;
}
}
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "_cursesi_addwchar: non-spacing list header: %p\n",
lp->nsp);
__CTRACE(__CTRACE_INPUT, "_cursesi_addwchar: add rest columns (%d:%d)\n",
sx + 1, sx + cw - 1);
#endif /* DEBUG */
for (tp = lp + 1, *x = sx + 1; *x - sx <= cw - 1; tp++, (*x)++) {
if (tp->nsp) {
__cursesi_free_nsp(tp->nsp);
tp->nsp = NULL;
}
tp->ch = wch->vals[0];
tp->attr = lp->attr & WA_ATTRIBUTES;
/* Mark as "continuation" cell */
tp->attr |= __WCWIDTH;
}
if (*x == win->maxx) {
(*lnp)->flags |= __ISPASTEOL;
newx = win->maxx - 1 + win->ch_off;
if (newx > *(*lnp)->lastchp)
*(*lnp)->lastchp = newx;
__touchline(win, *y, sx, (int) win->maxx - 1);
win->curx = sx;
} else {
win->curx = *x;
/* clear the remining of the current characer */
if (*x && *x < win->maxx) {
ex = sx + cw;
tp = &win->alines[*y]->line[ex];
while (ex < win->maxx && WCOL(*tp) < 0) {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"_cursesi_addwchar: clear "
"remaining of current char (%d,%d)nn",
*y, ex);
#endif /* DEBUG */
tp->ch = (wchar_t) btowc((int) win->bch);
if (_cursesi_copy_nsp(win->bnsp, tp) == ERR)
return ERR;
tp->attr = win->battr;
SET_WCOL(*tp, 1);
tp++, ex++;
}
newx = ex - 1 + win->ch_off;
if (newx > *(*lnp)->lastchp)
*(*lnp)->lastchp = newx;
__touchline(win, *y, sx, ex - 1);
}
}
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT, "add_wch: %d : 0x%x\n", lp->ch, lp->attr);
#endif /* DEBUG */
return OK;
#endif
}
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