rcons_subr.c

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    1 /*      $NetBSD: rcons_subr.c,v 1.12 2003/08/07 16:31:21 agc Exp $ */
    2 
    3 /*
    4  * Copyright (c) 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This software was developed by the Computer Systems Engineering group
    8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
    9  * contributed to Berkeley.
   10  *
   11  * All advertising materials mentioning features or use of this software
   12  * must display the following acknowledgement:
   13  *      This product includes software developed by the University of
   14  *      California, Lawrence Berkeley Laboratory.
   15  *
   16  * Redistribution and use in source and binary forms, with or without
   17  * modification, are permitted provided that the following conditions
   18  * are met:
   19  * 1. Redistributions of source code must retain the above copyright
   20  *    notice, this list of conditions and the following disclaimer.
   21  * 2. Redistributions in binary form must reproduce the above copyright
   22  *    notice, this list of conditions and the following disclaimer in the
   23  *    documentation and/or other materials provided with the distribution.
   24  * 3. Neither the name of the University nor the names of its contributors
   25  *    may be used to endorse or promote products derived from this software
   26  *    without specific prior written permission.
   27  *
   28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   38  * SUCH DAMAGE.
   39  *
   40  *      @(#)rcons_subr.c        8.1 (Berkeley) 6/11/93
   41  */
   42 
   43 #include <sys/cdefs.h>
   44 __KERNEL_RCSID(0, "$NetBSD: rcons_subr.c,v 1.12 2003/08/07 16:31:21 agc Exp $");
   45 
   46 #include <sys/param.h>
   47 #ifdef _KERNEL
   48 #include <sys/device.h>
   49 #include <sys/systm.h>
   50 #else
   51 #include "myfbdevice.h"
   52 #endif
   53 
   54 #include <dev/rcons/rcons.h>
   55 #include <dev/wscons/wsdisplayvar.h>
   56 
   57 extern void rcons_bell(struct rconsole *);
   58 
   59 #if 0
   60 #define RCONS_ISPRINT(c) ((((c) >= ' ') && ((c) <= '~')) || ((c) > 160))
   61 #else
   62 #define RCONS_ISPRINT(c) (((((c) >= ' ') && ((c) <= '~'))) || ((c) > 127))
   63 #endif
   64 #define RCONS_ISDIGIT(c) ((c) >= '' && (c) <= '9')
   65 
   66 /* Initialize our operations set */
   67 void
   68 rcons_init_ops(rc)
   69         struct rconsole *rc;
   70 {
   71         long tmp;
   72         int i, m;
   73 
   74         m = sizeof(rc->rc_charmap) / sizeof(rc->rc_charmap[0]);
   75         
   76         for (i = 0; i < m; i++)
   77                 rc->rc_ops->mapchar(rc->rc_cookie, i, rc->rc_charmap + i);
   78 
   79         /* Determine which attributes the device supports. */
   80 #ifdef RASTERCONSOLE_FGCOL
   81         rc->rc_deffgcolor = RASTERCONSOLE_FGCOL;
   82 #endif
   83 #ifdef RASTERCONSOLE_BGCOL
   84         rc->rc_defbgcolor = RASTERCONSOLE_BGCOL;
   85 #endif
   86         rc->rc_fgcolor = rc->rc_deffgcolor;
   87         rc->rc_bgcolor = rc->rc_defbgcolor;
   88         rc->rc_supwsflg = 0;
   89         
   90         for (i = 1; i < 256; i <<= 1)
   91                 if (rc->rc_ops->allocattr(rc->rc_cookie, 0, 0, i, &tmp) == 0)
   92                         rc->rc_supwsflg |= i;
   93 
   94         /* Allocate kernel output attribute */
   95         rc->rc_wsflg = WSATTR_HILIT;
   96         rcons_setcolor(rc, rc->rc_deffgcolor, rc->rc_defbgcolor);
   97         rc->rc_kern_attr = rc->rc_attr;
   98         
   99         rc->rc_wsflg = 0;
  100         rcons_setcolor(rc, rc->rc_deffgcolor, rc->rc_defbgcolor);
  101         rc->rc_defattr = rc->rc_attr;
  102 }
  103 
  104 /* Output (or at least handle) a string sent to the console */
  105 void
  106 rcons_puts(rc, str, n)
  107         struct rconsole *rc;
  108         unsigned char *str;
  109         int n;
  110 {
  111         int c, i, j;
  112         unsigned char *cp;
  113 
  114         /* Jump scroll */
  115         /* XXX maybe this should be an option? */
  116         if ((rc->rc_bits & FB_INESC) == 0) {
  117                 /* Count newlines up to an escape sequence */
  118                 i = 0;
  119                 j = 0;
  120                 for (cp = str; j++ < n && *cp != '\033'; ++cp) {
  121                         if (*cp == '\n')
  122                                 ++i;
  123                         else if (*cp == '\013')
  124                                 --i;
  125                 }
  126 
  127                 /* Only jump scroll two or more rows */
  128                 if (rc->rc_row + i > rc->rc_maxrow + 1) {
  129                         /* Erase the cursor (if necessary) */
  130                         if (rc->rc_bits & FB_CURSOR)
  131                                 rcons_cursor(rc);
  132 
  133                         rcons_scroll(rc, i);
  134                 }
  135         }
  136 
  137         /* Process characters */
  138         while (--n >= 0) {
  139                 c = *str;
  140                 if (c == '\033') {
  141                         /* Start an escape (perhaps aborting one in progress) */
  142                         rc->rc_bits |= FB_INESC | FB_P0_DEFAULT | FB_P1_DEFAULT;
  143                         rc->rc_bits &= ~(FB_P0 | FB_P1);
  144 
  145                         /* Most parameters default to 1 */
  146                         rc->rc_p0 = rc->rc_p1 = 1;
  147                 } else if (rc->rc_bits & FB_INESC) {
  148                         rcons_esc(rc, c);
  149                 } else {
  150                         /* Erase the cursor (if necessary) */
  151                         if (rc->rc_bits & FB_CURSOR)
  152                                 rcons_cursor(rc);
  153 
  154                         /* Display the character */
  155                         if (RCONS_ISPRINT(c)) {
  156                                 /* Try to output as much as possible */
  157                                 j = rc->rc_maxcol - rc->rc_col;
  158                                 if (j > n)
  159                                         j = n;
  160                                 for (i = 1; i < j && RCONS_ISPRINT(str[i]); ++i)
  161                                         continue;
  162                                 rcons_text(rc, str, i);
  163                                 --i;
  164                                 str += i;
  165                                 n -= i;
  166                         } else
  167                                 rcons_pctrl(rc, c);
  168                 }
  169                 ++str;
  170         }
  171         /* Redraw the cursor (if necessary) */
  172         if ((rc->rc_bits & FB_CURSOR) == 0)
  173                 rcons_cursor(rc);
  174 }
  175 
  176 
  177 /* Handle a control character sent to the console */
  178 void
  179 rcons_pctrl(rc, c)
  180         struct rconsole *rc;
  181         int c;
  182 {
  183 
  184         switch (c) {
  185         case '\r':      /* Carriage return */
  186                 rc->rc_col = 0;
  187                 break;
  188 
  189         case '\b':      /* Backspace */
  190                 if (rc->rc_col > 0)
  191                         (rc->rc_col)--;
  192                 break;
  193 
  194         case '\v':      /* Vertical tab */
  195                 if (rc->rc_row > 0)
  196                         (rc->rc_row)--;
  197                 break;
  198 
  199         case '\f':      /* Formfeed */
  200                 rc->rc_row = rc->rc_col = 0;
  201                 rcons_clear2eop(rc);
  202                 break;
  203 
  204         case '\n':      /* Linefeed */
  205                 (rc->rc_row)++;
  206                 if (rc->rc_row >= rc->rc_maxrow)
  207                         rcons_scroll(rc, 1);
  208                 break;
  209 
  210         case '\a':      /* Bell */
  211                 rcons_bell(rc);
  212                 break;
  213 
  214         case '\t':      /* Horizontal tab */
  215                 rc->rc_col = (rc->rc_col + 8) & ~7;
  216                 if (rc->rc_col >= rc->rc_maxcol)
  217                         rc->rc_col = rc->rc_maxcol;
  218                 break;
  219         }
  220 }
  221 
  222 /* Handle the next character in an escape sequence */
  223 void
  224 rcons_esc(rc, c)
  225         struct rconsole *rc;
  226         int c;
  227 {
  228 
  229         if (c == '[') {
  230                 /* Parameter 0 */
  231                 rc->rc_bits &= ~FB_P1;
  232                 rc->rc_bits |= FB_P0;
  233         } else if (c == ';') {
  234                 /* Parameter 1 */
  235                 rc->rc_bits &= ~FB_P0;
  236                 rc->rc_bits |= FB_P1;
  237         } else if (RCONS_ISDIGIT(c)) {
  238                 /* Add a digit to a parameter */
  239                 if (rc->rc_bits & FB_P0) {
  240                         /* Parameter 0 */
  241                         if (rc->rc_bits & FB_P0_DEFAULT) {
  242                                 rc->rc_bits &= ~FB_P0_DEFAULT;
  243                                 rc->rc_p0 = 0;
  244                         }
  245                         rc->rc_p0 *= 10;
  246                         rc->rc_p0 += c - '';
  247                 } else if (rc->rc_bits & FB_P1) {
  248                         /* Parameter 1 */
  249                         if (rc->rc_bits & FB_P1_DEFAULT) {
  250                                 rc->rc_bits &= ~FB_P1_DEFAULT;
  251                                 rc->rc_p1 = 0;
  252                         }
  253                         rc->rc_p1 *= 10;
  254                         rc->rc_p1 += c - '';
  255                 }
  256         } else {
  257                 /* Erase the cursor (if necessary) */
  258                 if (rc->rc_bits & FB_CURSOR)
  259                         rcons_cursor(rc);
  260 
  261                 /* Process the completed escape sequence */
  262                 rcons_doesc(rc, c);
  263                 rc->rc_bits &= ~FB_INESC;
  264         }
  265 }
  266 
  267 
  268 /* Handle an SGR (Select Graphic Rendition) escape */
  269 void
  270 rcons_sgresc(rc, c)
  271         struct rconsole *rc;
  272         int c;
  273 {
  274 
  275         switch (c) {
  276         /* Clear all attributes || End underline */
  277         case 0:
  278                 rc->rc_wsflg = 0;
  279                 rc->rc_fgcolor = rc->rc_deffgcolor;
  280                 rc->rc_bgcolor = rc->rc_defbgcolor;
  281                 rc->rc_attr = rc->rc_defattr;
  282                 break;
  283 
  284         /* ANSI foreground color */
  285         case 30: case 31: case 32: case 33: 
  286         case 34: case 35: case 36: case 37: 
  287                 rcons_setcolor(rc, c - 30, rc->rc_bgcolor);
  288                 break;
  289 
  290         /* ANSI background color */
  291         case 40: case 41: case 42: case 43:
  292         case 44: case 45: case 46: case 47: 
  293                 rcons_setcolor(rc, rc->rc_fgcolor, c - 40);
  294                 break;
  295                 
  296         /* Begin reverse */
  297         case 7: 
  298                 rc->rc_wsflg |= WSATTR_REVERSE;
  299                 rcons_setcolor(rc, rc->rc_fgcolor, rc->rc_bgcolor);
  300                 break;
  301                 
  302         /* Begin bold */
  303         case 1:
  304                 rc->rc_wsflg |= WSATTR_HILIT;
  305                 rcons_setcolor(rc, rc->rc_fgcolor, rc->rc_bgcolor);
  306                 break;                  
  307                 
  308         /* Begin underline */
  309         case 4:
  310                 rc->rc_wsflg |= WSATTR_UNDERLINE;
  311                 rcons_setcolor(rc, rc->rc_fgcolor, rc->rc_bgcolor);
  312                 break;                  
  313         }
  314 }
  315 
  316 
  317 /* Process a complete escape sequence */
  318 void
  319 rcons_doesc(rc, c)
  320         struct rconsole *rc;
  321         int c;
  322 {
  323 
  324 #ifdef notdef
  325         /* XXX add escape sequence to enable visual (and audible) bell */
  326         rc->rc_bits = FB_VISBELL;
  327 #endif
  328 
  329         switch (c) {
  330 
  331         case '@':
  332                 /* Insert Character (ICH) */
  333                 rcons_insertchar(rc, rc->rc_p0);
  334                 break;
  335 
  336         case 'A':
  337                 /* Cursor Up (CUU) */
  338                 rc->rc_row -= rc->rc_p0;
  339                 if (rc->rc_row < 0)
  340                         rc->rc_row = 0;
  341                 break;
  342 
  343         case 'B':
  344                 /* Cursor Down (CUD) */
  345                 rc->rc_row += rc->rc_p0;
  346                 if (rc->rc_row >= rc->rc_maxrow)
  347                         rc->rc_row = rc->rc_maxrow - 1;
  348                 break;
  349 
  350         case 'C':
  351                 /* Cursor Forward (CUF) */
  352                 rc->rc_col += rc->rc_p0;
  353                 if (rc->rc_col >= rc->rc_maxcol)
  354                         rc->rc_col = rc->rc_maxcol - 1;
  355                 break;
  356 
  357         case 'D':
  358                 /* Cursor Backward (CUB) */
  359                 rc->rc_col -= rc->rc_p0;
  360                 if (rc->rc_col < 0)
  361                         rc->rc_col = 0;
  362                 break;
  363 
  364         case 'E':
  365                 /* Cursor Next Line (CNL) */
  366                 rc->rc_col = 0;
  367                 rc->rc_row += rc->rc_p0;
  368                 if (rc->rc_row >= rc->rc_maxrow)
  369                         rc->rc_row = rc->rc_maxrow - 1;
  370                 break;
  371 
  372         case 'f':
  373                 /* Horizontal And Vertical Position (HVP) */
  374         case 'H':
  375                 /* Cursor Position (CUP) */
  376                 rc->rc_col = rc->rc_p1 - 1;
  377                 if (rc->rc_col < 0)
  378                         rc->rc_col = 0;
  379                 else if (rc->rc_col >= rc->rc_maxcol)
  380                         rc->rc_col = rc->rc_maxcol - 1;
  381 
  382                 rc->rc_row = rc->rc_p0 - 1;
  383                 if (rc->rc_row < 0)
  384                         rc->rc_row = 0;
  385                 else if (rc->rc_row >= rc->rc_maxrow)
  386                         rc->rc_row = rc->rc_maxrow - 1;
  387                 break;
  388 
  389         case 'J':
  390                 /* Erase in Display (ED) */
  391                 rcons_clear2eop(rc);
  392                 break;
  393 
  394         case 'K':
  395                 /* Erase in Line (EL) */
  396                 rcons_clear2eol(rc);
  397                 break;
  398 
  399         case 'L':
  400                 /* Insert Line (IL) */
  401                 rcons_insertline(rc, rc->rc_p0);
  402                 break;
  403 
  404         case 'M':
  405                 /* Delete Line (DL) */
  406                 rcons_delline(rc, rc->rc_p0);
  407                 break;
  408 
  409         case 'P':
  410                 /* Delete Character (DCH) */
  411                 rcons_delchar(rc, rc->rc_p0);
  412                 break;
  413 
  414         case 'm':
  415                 /* Select Graphic Rendition (SGR) */
  416                 /* (defaults to zero) */
  417                 if (rc->rc_bits & FB_P0_DEFAULT)
  418                         rc->rc_p0 = 0;
  419                 
  420                 if (rc->rc_bits & FB_P1_DEFAULT)
  421                         rc->rc_p1 = 0;
  422                 
  423                 rcons_sgresc(rc, rc->rc_p0);
  424                 
  425                 if (rc->rc_bits & FB_P1)
  426                         rcons_sgresc(rc, rc->rc_p1);
  427 
  428                 break;
  429 
  430         /*
  431          * XXX: setting SUNBOW and SUNWOB should probably affect
  432          * deffgcolor, defbgcolor and defattr too.
  433          */
  434         case 'p':
  435                 /* Black On White (SUNBOW) */
  436                 rcons_setcolor(rc, WSCOL_BLACK, WSCOL_WHITE);
  437                 break;
  438 
  439         case 'q':
  440                 /* White On Black (SUNWOB) */
  441                 rcons_setcolor(rc, WSCOL_WHITE, WSCOL_BLACK);
  442                 break;
  443 
  444         case 'r':
  445                 /* Set scrolling (SUNSCRL) */
  446                 /* (defaults to zero) */
  447                 if (rc->rc_bits & FB_P0_DEFAULT)
  448                         rc->rc_p0 = 0;
  449                 /* XXX not implemented yet */
  450                 rc->rc_scroll = rc->rc_p0;
  451                 break;
  452 
  453         case 's':
  454                 /* Reset terminal emulator (SUNRESET) */
  455                 rc->rc_wsflg = 0;
  456                 rc->rc_scroll = 0;
  457                 rc->rc_bits &= ~FB_NO_CURSOR;
  458                 rc->rc_fgcolor = rc->rc_deffgcolor;
  459                 rc->rc_bgcolor = rc->rc_defbgcolor;
  460                 rc->rc_attr = rc->rc_defattr;
  461 
  462                 if (rc->rc_bits & FB_INVERT)
  463                         rcons_invert(rc, 0);
  464                 break;
  465 #ifdef notyet
  466         /* 
  467          * XXX following two read \E[?25h and \E[?25l. rcons
  468          * can't currently handle the '?'.
  469          */
  470         case 'h':
  471                 /* Normal/very visible cursor */
  472                 if (rc->rc_p0 == 25) {
  473                         rc->rc_bits &= ~FB_NO_CURSOR;
  474                         
  475                         if (rc->rc_bits & FB_CURSOR) {
  476                                 rc->rc_bits ^= FB_CURSOR;
  477                                 rcons_cursor(rc);
  478                         }
  479                 }
  480                 break;
  481                 
  482         case 'l':
  483                 /* Invisible cursor */
  484                 if (rc->rc_p0 == 25 && (rc->rc_bits & FB_NO_CURSOR) == 0) {
  485                         if (rc->rc_bits & FB_CURSOR)
  486                                 rcons_cursor(rc);
  487                 
  488                         rc->rc_bits |= FB_NO_CURSOR;
  489                 }
  490                 break;
  491 #endif
  492         }
  493 }
  494 
  495 /* Set ANSI colors */
  496 void
  497 rcons_setcolor(rc, fg, bg)
  498         struct rconsole *rc;
  499         int fg, bg;
  500 {
  501         int flg;
  502         
  503         if (fg > WSCOL_WHITE || fg < 0)
  504                 return;
  505                 
  506         if (bg > WSCOL_WHITE || bg < 0)
  507                 return;
  508 
  509 #ifdef RASTERCONS_WONB
  510         flg = bg;
  511         bg = fg;
  512         fg = flg;
  513 #endif  
  514 
  515         /* Emulate WSATTR_REVERSE attribute if it's not supported */
  516         if ((rc->rc_wsflg & WSATTR_REVERSE) && 
  517             !(rc->rc_supwsflg & WSATTR_REVERSE)) {
  518                 flg = bg;
  519                 bg = fg;
  520                 fg = flg;
  521         }
  522         
  523         /*
  524          * Mask out unsupported flags and get attribute
  525          * XXX - always ask for WSCOLORS if supported (why shouldn't we?)
  526          */
  527         flg = (rc->rc_wsflg | WSATTR_WSCOLORS) & rc->rc_supwsflg;
  528         rc->rc_bgcolor = bg;
  529         rc->rc_fgcolor = fg;
  530         rc->rc_ops->allocattr(rc->rc_cookie, fg, bg, flg, &rc->rc_attr);
  531 }
  532 
  533 
  534 /* Actually write a string to the frame buffer */
  535 void
  536 rcons_text(rc, str, n)
  537         struct rconsole *rc;
  538         unsigned char *str;
  539         int n;
  540 {
  541         u_int uc;
  542                 
  543         while (n--) {
  544                 uc = rc->rc_charmap[*str++ & 255];
  545                 rc->rc_ops->putchar(rc->rc_cookie, rc->rc_row, rc->rc_col++,
  546                     uc, rc->rc_attr);                                                                                                  
  547         }
  548 
  549         if (rc->rc_col >= rc->rc_maxcol) {
  550                 rc->rc_col = 0;
  551                 rc->rc_row++;
  552         }
  553 
  554         if (rc->rc_row >= rc->rc_maxrow)
  555                 rcons_scroll(rc, 1);
  556 }
  557 
  558 /* Paint (or unpaint) the cursor */
  559 void
  560 rcons_cursor(rc)
  561         struct rconsole *rc;
  562 {
  563         rc->rc_bits ^= FB_CURSOR;
  564         
  565         if (rc->rc_bits & FB_NO_CURSOR)
  566                 return;
  567         
  568         rc->rc_ops->cursor(rc->rc_cookie, rc->rc_bits & FB_CURSOR,
  569             rc->rc_row, rc->rc_col);
  570 }
  571 
  572 /* Possibly change to SUNWOB or SUNBOW mode */
  573 void
  574 rcons_invert(rc, wob)
  575         struct rconsole *rc;
  576         int wob;
  577 {
  578 
  579         rc->rc_bits ^= FB_INVERT;
  580         /* XXX how do we do we invert the framebuffer?? */
  581 }
  582 
  583 /* Clear to the end of the page */
  584 void
  585 rcons_clear2eop(rc)
  586         struct rconsole *rc;
  587 {
  588         if (rc->rc_col || rc->rc_row) {
  589                 rcons_clear2eol(rc);
  590 
  591                 if (rc->rc_row < (rc->rc_maxrow - 1))
  592                         rc->rc_ops->eraserows(rc->rc_cookie, rc->rc_row + 1, 
  593                             rc->rc_maxrow, rc->rc_attr);
  594         } else
  595                 rc->rc_ops->eraserows(rc->rc_cookie, 0, rc->rc_maxrow,
  596                     rc->rc_attr);
  597 }
  598 
  599 /* Clear to the end of the line */
  600 void
  601 rcons_clear2eol(rc)
  602         struct rconsole *rc;
  603 {
  604         rc->rc_ops->erasecols(rc->rc_cookie, rc->rc_row, rc->rc_col,
  605             rc->rc_maxcol - rc->rc_col, rc->rc_attr);
  606 }
  607 
  608 
  609 /* Scroll up */
  610 void
  611 rcons_scroll(rc, n)
  612         struct rconsole *rc;
  613         int n;
  614 {
  615         /* Can't scroll more than the whole screen */
  616         if (n > rc->rc_maxrow)
  617                 n = rc->rc_maxrow;
  618 
  619         /* Calculate new row */
  620         rc->rc_row -= n;
  621 
  622         if (rc->rc_row < 0)
  623                 rc->rc_row = 0;
  624 
  625         rc->rc_ops->copyrows(rc->rc_cookie, n, 0, rc->rc_maxrow - n);
  626         rc->rc_ops->eraserows(rc->rc_cookie, rc->rc_maxrow - n, n,  rc->rc_attr);
  627 }
  628 
  629 /* Delete characters */
  630 void
  631 rcons_delchar(rc, n)
  632         struct rconsole *rc;
  633         int n;
  634 {
  635         /* Can't delete more chars than there are */
  636         if (n > rc->rc_maxcol - rc->rc_col)
  637                 n = rc->rc_maxcol - rc->rc_col;
  638                 
  639         rc->rc_ops->copycols(rc->rc_cookie, rc->rc_row, rc->rc_col + n,
  640             rc->rc_col, rc->rc_maxcol - rc->rc_col - n);
  641 
  642         rc->rc_ops->erasecols(rc->rc_cookie, rc->rc_row, 
  643             rc->rc_maxcol - n, n, rc->rc_attr);
  644 }
  645 
  646 /* Delete a number of lines */
  647 void
  648 rcons_delline(rc, n)
  649         struct rconsole *rc;
  650         int n;
  651 {
  652         /* Can't delete more lines than there are */
  653         if (n > rc->rc_maxrow - rc->rc_row)
  654                 n = rc->rc_maxrow - rc->rc_row;
  655 
  656         rc->rc_ops->copyrows(rc->rc_cookie, rc->rc_row + n, rc->rc_row,
  657             rc->rc_maxrow - rc->rc_row - n);
  658 
  659         rc->rc_ops->eraserows(rc->rc_cookie, rc->rc_maxrow - n, n,
  660             rc->rc_attr);
  661 }
  662 
  663 /* Insert some characters */
  664 void
  665 rcons_insertchar(rc, n)
  666         struct rconsole *rc;
  667         int n;
  668 {
  669         /* Can't insert more chars than can fit */
  670         if (n > rc->rc_maxcol - rc->rc_col)
  671                 n = rc->rc_maxcol - rc->rc_col - 1;
  672                 
  673         rc->rc_ops->copycols(rc->rc_cookie, rc->rc_row, rc->rc_col,
  674             rc->rc_col + n, rc->rc_maxcol - rc->rc_col - n - 1);
  675 
  676         rc->rc_ops->erasecols(rc->rc_cookie, rc->rc_row, rc->rc_col,
  677             n, rc->rc_attr);
  678 }
  679 
  680 /* Insert some lines */
  681 void
  682 rcons_insertline(rc, n)
  683         struct rconsole *rc;
  684         int n;
  685 {
  686         /* Can't insert more lines than can fit */
  687         if (n > rc->rc_maxrow - rc->rc_row)
  688                 n = rc->rc_maxrow - rc->rc_row;
  689 
  690         rc->rc_ops->copyrows(rc->rc_cookie, rc->rc_row, rc->rc_row + n,
  691             rc->rc_maxrow - rc->rc_row - n);
  692 
  693         rc->rc_ops->eraserows(rc->rc_cookie, rc->rc_row, n,
  694             rc->rc_attr);
  695 }
  696 
  697 /* end of rcons_subr.c */
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FreeBSD/Linux Kernel Cross Reference sys/dev/rcons/rcons_subr.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/rcons/rcons_subr.c
