/* $OpenBSD: wsemul_sun.c,v 1.19 2007/01/07 13:28:50 miod Exp $ */ /* $NetBSD: wsemul_sun.c,v 1.11 2000/01/05 11:19:36 drochner Exp $ */ /* * Copyright (c) 1996, 1997 Christopher G. Demetriou. 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou * for the NetBSD Project. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * This file implements a sun terminal personality for wscons. * * Derived from old rcons code. * Color support from NetBSD's rcons color code, and wsemul_vt100. */ #ifndef SMALL_KERNEL #define JUMP_SCROLL #endif #include #include #include #include #include #include #include #include #include #include void *wsemul_sun_cnattach(const struct wsscreen_descr *, void *, int, int, long); void *wsemul_sun_attach(int, const struct wsscreen_descr *, void *, int, int, void *, long); void wsemul_sun_output(void *, const u_char *, u_int, int); int wsemul_sun_translate(void *, keysym_t, char **); void wsemul_sun_detach(void *, u_int *, u_int *); void wsemul_sun_resetop(void *, enum wsemul_resetops); const struct wsemul_ops wsemul_sun_ops = { "sun", wsemul_sun_cnattach, wsemul_sun_attach, wsemul_sun_output, wsemul_sun_translate, wsemul_sun_detach, wsemul_sun_resetop }; #define SUN_EMUL_STATE_NORMAL 0 /* normal processing */ #define SUN_EMUL_STATE_HAVEESC 1 /* seen start of ctl seq */ #define SUN_EMUL_STATE_CONTROL 2 /* processing ctl seq */ #define SUN_EMUL_NARGS 2 /* max # of args to a command */ struct wsemul_sun_emuldata { const struct wsdisplay_emulops *emulops; void *emulcookie; void *cbcookie; int scrcapabilities; u_int nrows, ncols, crow, ccol; long defattr; /* default attribute (rendition) */ u_int state; /* processing state */ u_int args[SUN_EMUL_NARGS]; /* command args, if CONTROL */ int nargs; /* number of args */ u_int scrolldist; /* distance to scroll */ long curattr, bkgdattr; /* currently used attribute */ long kernattr; /* attribute for kernel output */ int attrflags, fgcol, bgcol; /* properties of curattr */ #ifdef DIAGNOSTIC int console; #endif }; void wsemul_sun_init(struct wsemul_sun_emuldata *, const struct wsscreen_descr *, void *, int, int, long); void wsemul_sun_reset(struct wsemul_sun_emuldata *); void wsemul_sun_output_lowchars(struct wsemul_sun_emuldata *, u_char, int); void wsemul_sun_output_normal(struct wsemul_sun_emuldata *, u_char, int); u_int wsemul_sun_output_haveesc(struct wsemul_sun_emuldata *, u_char); u_int wsemul_sun_output_control(struct wsemul_sun_emuldata *, u_char); void wsemul_sun_control(struct wsemul_sun_emuldata *, u_char); int wsemul_sun_selectattribute(struct wsemul_sun_emuldata *, int, int, int, long *, long *); void wsemul_sun_scrollup(struct wsemul_sun_emuldata *, u_int); struct wsemul_sun_emuldata wsemul_sun_console_emuldata; /* some useful utility macros */ #define ARG(n,c) \ ((n) >= edp->nargs ? 0 : edp->args[(n) + MAX(0, edp->nargs - (c))]) #define NORMALIZE(arg) ((arg) != 0 ? (arg) : 1) #define COLS_LEFT (edp->ncols - 1 - edp->ccol) #define ROWS_LEFT (edp->nrows - 1 - edp->crow) void wsemul_sun_init(edp, type, cookie, ccol, crow, defattr) struct wsemul_sun_emuldata *edp; const struct wsscreen_descr *type; void *cookie; int ccol, crow; long defattr; { edp->emulops = type->textops; edp->emulcookie = cookie; edp->scrcapabilities = type->capabilities; edp->nrows = type->nrows; edp->ncols = type->ncols; edp->crow = crow; edp->ccol = ccol; edp->defattr = defattr; } void wsemul_sun_reset(edp) struct wsemul_sun_emuldata *edp; { edp->state = SUN_EMUL_STATE_NORMAL; edp->bkgdattr = edp->curattr = edp->defattr; edp->attrflags = 0; edp->fgcol = WSCOL_BLACK; edp->bgcol = WSCOL_WHITE; edp->scrolldist = 1; } void * wsemul_sun_cnattach(type, cookie, ccol, crow, defattr) const struct wsscreen_descr *type; void *cookie; int ccol, crow; long defattr; { struct wsemul_sun_emuldata *edp; int res; edp = &wsemul_sun_console_emuldata; wsemul_sun_init(edp, type, cookie, ccol, crow, defattr); #ifndef WS_KERNEL_FG #define WS_KERNEL_FG WSCOL_BLACK #endif #ifndef WS_KERNEL_BG #define WS_KERNEL_BG WSCOL_WHITE #endif #ifndef WS_KERNEL_COLATTR #define WS_KERNEL_COLATTR 0 #endif #ifndef WS_KERNEL_MONOATTR #define WS_KERNEL_MONOATTR 0 #endif if (type->capabilities & WSSCREEN_WSCOLORS) res = (*edp->emulops->alloc_attr)(cookie, WS_KERNEL_FG, WS_KERNEL_BG, WS_KERNEL_COLATTR | WSATTR_WSCOLORS, &edp->kernattr); else res = (*edp->emulops->alloc_attr)(cookie, 0, 0, WS_KERNEL_MONOATTR, &edp->kernattr); if (res) edp->kernattr = defattr; edp->cbcookie = NULL; #ifdef DIAGNOSTIC edp->console = 1; #endif wsemul_sun_reset(edp); return (edp); } void * wsemul_sun_attach(console, type, cookie, ccol, crow, cbcookie, defattr) int console; const struct wsscreen_descr *type; void *cookie; int ccol, crow; void *cbcookie; long defattr; { struct wsemul_sun_emuldata *edp; if (console) { edp = &wsemul_sun_console_emuldata; #ifdef DIAGNOSTIC KASSERT(edp->console == 1); #endif } else { edp = malloc(sizeof *edp, M_DEVBUF, M_NOWAIT); if (edp == NULL) return (NULL); wsemul_sun_init(edp, type, cookie, ccol, crow, defattr); #ifdef DIAGNOSTIC edp->console = 0; #endif } edp->cbcookie = cbcookie; wsemul_sun_reset(edp); return (edp); } void wsemul_sun_output_lowchars(edp, c, kernel) struct wsemul_sun_emuldata *edp; u_char c; int kernel; { u_int n; switch (c) { case ASCII_NUL: default: /* ignore */ break; case ASCII_BEL: /* "Bell (BEL)" */ wsdisplay_emulbell(edp->cbcookie); break; case ASCII_BS: /* "Backspace (BS)" */ if (edp->ccol > 0) edp->ccol--; break; case ASCII_CR: /* "Return (CR)" */ edp->ccol = 0; break; case ASCII_HT: /* "Tab (TAB)" */ n = min(8 - (edp->ccol & 7), COLS_LEFT); if (n != 0) { (*edp->emulops->erasecols)(edp->emulcookie, edp->crow, edp->ccol, n, kernel ? edp->kernattr : edp->bkgdattr); edp->ccol += n; } break; case ASCII_FF: /* "Form Feed (FF)" */ (*edp->emulops->eraserows)(edp->emulcookie, 0, edp->nrows, edp->bkgdattr); edp->ccol = edp->crow = 0; break; case ASCII_VT: /* "Reverse Line Feed" */ if (edp->crow > 0) edp->crow--; break; case ASCII_ESC: /* "Escape (ESC)" */ if (kernel) { printf("wsemul_sun_output_lowchars: ESC in kernel " "output ignored\n"); break; /* ignore the ESC */ } edp->state = SUN_EMUL_STATE_HAVEESC; break; case ASCII_LF: /* "Line Feed (LF)" */ /* if the cur line isn't the last, incr and leave. */ if (ROWS_LEFT > 0) edp->crow++; else wsemul_sun_scrollup(edp, edp->scrolldist); break; } } void wsemul_sun_output_normal(edp, c, kernel) struct wsemul_sun_emuldata *edp; u_char c; int kernel; { (*edp->emulops->putchar)(edp->emulcookie, edp->crow, edp->ccol, c, kernel ? edp->kernattr : edp->curattr); if (++edp->ccol >= edp->ncols) { /* if the cur line isn't the last, incr and leave. */ if (ROWS_LEFT > 0) edp->crow++; else wsemul_sun_scrollup(edp, edp->scrolldist); edp->ccol = 0; } } u_int wsemul_sun_output_haveesc(edp, c) struct wsemul_sun_emuldata *edp; u_char c; { u_int newstate; switch (c) { case '[': /* continuation of multi-char sequence */ edp->nargs = 0; bzero(edp->args, sizeof (edp->args)); newstate = SUN_EMUL_STATE_CONTROL; break; default: #ifdef DEBUG printf("ESC%c unknown\n", c); #endif newstate = SUN_EMUL_STATE_NORMAL; /* XXX is this wise? */ break; } return (newstate); } void wsemul_sun_control(edp, c) struct wsemul_sun_emuldata *edp; u_char c; { u_int n, src, dst; int flags, fgcol, bgcol; long attr, bkgdattr; switch (c) { case '@': /* "Insert Character (ICH)" */ n = min(NORMALIZE(ARG(0,1)), COLS_LEFT + 1); src = edp->ccol; dst = edp->ccol + n; if (dst < edp->ncols) { (*edp->emulops->copycols)(edp->emulcookie, edp->crow, src, dst, edp->ncols - dst); } (*edp->emulops->erasecols)(edp->emulcookie, edp->crow, src, n, edp->bkgdattr); break; case 'A': /* "Cursor Up (CUU)" */ edp->crow -= min(NORMALIZE(ARG(0,1)), edp->crow); break; case 'E': /* "Cursor Next Line (CNL)" */ edp->ccol = 0; /* FALLTHRU */ case 'B': /* "Cursor Down (CUD)" */ edp->crow += min(NORMALIZE(ARG(0,1)), ROWS_LEFT); break; case 'C': /* "Cursor Forward (CUF)" */ edp->ccol += min(NORMALIZE(ARG(0,1)), COLS_LEFT); break; case 'D': /* "Cursor Backward (CUB)" */ edp->ccol -= min(NORMALIZE(ARG(0,1)), edp->ccol); break; case 'f': /* "Horizontal And Vertical Position (HVP)" */ case 'H': /* "Cursor Position (CUP)" */ edp->crow = min(NORMALIZE(ARG(0,2)), edp->nrows) - 1; edp->ccol = min(NORMALIZE(ARG(1,2)), edp->ncols) - 1; break; case 'J': /* "Erase in Display (ED)" */ if (ROWS_LEFT > 0) { (*edp->emulops->eraserows)(edp->emulcookie, edp->crow + 1, ROWS_LEFT, edp->bkgdattr); } /* FALLTHRU */ case 'K': /* "Erase in Line (EL)" */ (*edp->emulops->erasecols)(edp->emulcookie, edp->crow, edp->ccol, COLS_LEFT + 1, edp->bkgdattr); break; case 'L': /* "Insert Line (IL)" */ n = min(NORMALIZE(ARG(0,1)), ROWS_LEFT + 1); src = edp->crow; dst = edp->crow + n; if (dst < edp->nrows) { (*edp->emulops->copyrows)(edp->emulcookie, src, dst, edp->nrows - dst); } (*edp->emulops->eraserows)(edp->emulcookie, src, n, edp->bkgdattr); break; case 'M': /* "Delete Line (DL)" */ n = min(NORMALIZE(ARG(0,1)), ROWS_LEFT + 1); src = edp->crow + n; dst = edp->crow; if (src < edp->nrows) { (*edp->emulops->copyrows)(edp->emulcookie, src, dst, edp->nrows - src); } (*edp->emulops->eraserows)(edp->emulcookie, dst + edp->nrows - src, n, edp->bkgdattr); break; case 'P': /* "Delete Character (DCH)" */ n = min(NORMALIZE(ARG(0,1)), COLS_LEFT + 1); src = edp->ccol + n; dst = edp->ccol; if (src < edp->ncols) { (*edp->emulops->copycols)(edp->emulcookie, edp->crow, src, dst, edp->ncols - src); } (*edp->emulops->erasecols)(edp->emulcookie, edp->crow, edp->ncols - n, n, edp->bkgdattr); break; case 'm': /* "Select Graphic Rendition (SGR)" */ flags = edp->attrflags; fgcol = edp->fgcol; bgcol = edp->bgcol; for (n = 0; n < edp->nargs; n++) { switch (ARG(n,edp->nargs)) { /* Clear all attributes || End underline */ case 0: if (n == edp->nargs - 1) { edp->bkgdattr = edp->curattr = edp->defattr; edp->attrflags = 0; edp->fgcol = WSCOL_BLACK; edp->bgcol = WSCOL_WHITE; return; } flags = 0; fgcol = WSCOL_BLACK; bgcol = WSCOL_WHITE; break; /* Begin bold */ case 1: flags |= WSATTR_HILIT; break; /* Begin underline */ case 4: flags |= WSATTR_UNDERLINE; break; /* Begin reverse */ case 7: flags |= WSATTR_REVERSE; break; /* ANSI foreground color */ case 30: case 31: case 32: case 33: case 34: case 35: case 36: case 37: fgcol = ARG(n,edp->nargs) - 30; break; /* ANSI background color */ case 40: case 41: case 42: case 43: case 44: case 45: case 46: case 47: bgcol = ARG(n,edp->nargs) - 40; break; } } setattr: if (wsemul_sun_selectattribute(edp, flags, fgcol, bgcol, &attr, &bkgdattr)) { #ifdef DEBUG printf("error allocating attr %d/%d/%x\n", fgcol, bgcol, flags); #endif } else { edp->curattr = attr; edp->bkgdattr = bkgdattr; edp->attrflags = flags; edp->fgcol = fgcol; edp->bgcol = bgcol; } break; case 'p': /* "Black On White (SUNBOW)" */ flags = 0; fgcol = WSCOL_BLACK; bgcol = WSCOL_WHITE; goto setattr; case 'q': /* "White On Black (SUNWOB)" */ flags = 0; fgcol = WSCOL_WHITE; bgcol = WSCOL_BLACK; goto setattr; case 'r': /* "Set Scrolling (SUNSCRL)" */ edp->scrolldist = min(ARG(0,1), edp->nrows); break; case 's': /* "Reset Terminal Emulator (SUNRESET)" */ wsemul_sun_reset(edp); break; } } u_int wsemul_sun_output_control(edp, c) struct wsemul_sun_emuldata *edp; u_char c; { u_int newstate = SUN_EMUL_STATE_CONTROL; switch (c) { case '0': case '1': case '2': case '3': case '4': /* argument digit */ case '5': case '6': case '7': case '8': case '9': /* * If we receive more arguments than we are expecting, * discard the earliest arguments. */ if (edp->nargs > SUN_EMUL_NARGS - 1) { bcopy(edp->args + 1, edp->args, (SUN_EMUL_NARGS - 1) * sizeof(edp->args[0])); edp->args[edp->nargs = SUN_EMUL_NARGS - 1] = 0; } edp->args[edp->nargs] = (edp->args[edp->nargs] * 10) + (c - '0'); break; case ';': /* argument terminator */ edp->nargs++; break; default: /* end of escape sequence */ edp->nargs++; if (edp->nargs > SUN_EMUL_NARGS) edp->nargs = SUN_EMUL_NARGS; wsemul_sun_control(edp, c); newstate = SUN_EMUL_STATE_NORMAL; break; } return (newstate); } void wsemul_sun_output(cookie, data, count, kernel) void *cookie; const u_char *data; u_int count; int kernel; { struct wsemul_sun_emuldata *edp = cookie; u_int newstate; #ifdef JUMP_SCROLL const u_char *eot; u_char curchar; u_int cnt, pos, lines; #endif #ifdef DIAGNOSTIC if (kernel && !edp->console) panic("wsemul_sun_output: kernel output, not console"); #endif /* XXX */ (*edp->emulops->cursor)(edp->emulcookie, 0, edp->crow, edp->ccol); for (; count > 0; data++, count--) { #ifdef JUMP_SCROLL /* * If scrolling is not disabled and we are the bottom of * the screen, count newlines until an escape sequence * appears. */ if ((edp->state == SUN_EMUL_STATE_NORMAL || kernel) && ROWS_LEFT == 0 && edp->scrolldist != 0) { lines = 0; pos = edp->ccol; for (eot = data, cnt = count; cnt != 0; eot++, cnt--) { curchar = *eot; if (curchar == ASCII_FF || curchar == ASCII_VT || curchar == ASCII_ESC) break; switch (curchar) { case ASCII_BS: if (pos > 0) pos--; break; case ASCII_CR: pos = 0; break; case ASCII_HT: pos = (pos + 7) & ~7; if (pos >= edp->ncols) pos = edp->ncols - 1; break; default: if (++pos >= edp->ncols) { pos = 0; curchar = ASCII_LF; } break; } if (curchar == ASCII_LF) { if (++lines >= edp->nrows - 1) break; } } if (lines > 1) { wsemul_sun_scrollup(edp, lines); edp->crow--; } } #endif if (*data < ' ') { wsemul_sun_output_lowchars(edp, *data, kernel); continue; } if (kernel) { wsemul_sun_output_normal(edp, *data, 1); continue; } switch (newstate = edp->state) { case SUN_EMUL_STATE_NORMAL: wsemul_sun_output_normal(edp, *data, 0); break; case SUN_EMUL_STATE_HAVEESC: newstate = wsemul_sun_output_haveesc(edp, *data); break; case SUN_EMUL_STATE_CONTROL: newstate = wsemul_sun_output_control(edp, *data); break; default: #ifdef DIAGNOSTIC panic("wsemul_sun: invalid state %d", edp->state); #else /* try to recover, if things get screwed up... */ newstate = SUN_EMUL_STATE_NORMAL; wsemul_sun_output_normal(edp, *data, 0); #endif break; } edp->state = newstate; } /* XXX */ (*edp->emulops->cursor)(edp->emulcookie, 1, edp->crow, edp->ccol); } /* * Get an attribute from the graphics driver. * Try to find replacements if the desired appearance is not supported. */ int wsemul_sun_selectattribute(edp, flags, fgcol, bgcol, attr, bkgdattr) struct wsemul_sun_emuldata *edp; int flags, fgcol, bgcol; long *attr, *bkgdattr; { int error; /* * Rasops will force white on black as normal output colors, unless * WSATTR_WSCOLORS is specified. Since Sun console is black on white, * always use WSATTR_WSCOLORS and our colors, as we know better. */ if (!(edp->scrcapabilities & WSSCREEN_WSCOLORS)) { flags &= ~WSATTR_WSCOLORS; } else { flags |= WSATTR_WSCOLORS; } error = (*edp->emulops->alloc_attr)(edp->emulcookie, fgcol, bgcol, flags & WSATTR_WSCOLORS, bkgdattr); if (error) return (error); if ((flags & WSATTR_HILIT) && !(edp->scrcapabilities & WSSCREEN_HILIT)) { flags &= ~WSATTR_HILIT; if (edp->scrcapabilities & WSSCREEN_WSCOLORS) { fgcol = WSCOL_RED; flags |= WSATTR_WSCOLORS; } } if ((flags & WSATTR_UNDERLINE) && !(edp->scrcapabilities & WSSCREEN_UNDERLINE)) { flags &= ~WSATTR_UNDERLINE; if (edp->scrcapabilities & WSSCREEN_WSCOLORS) { fgcol = WSCOL_CYAN; flags &= ~WSATTR_UNDERLINE; flags |= WSATTR_WSCOLORS; } } if ((flags & WSATTR_BLINK) && !(edp->scrcapabilities & WSSCREEN_BLINK)) { flags &= ~WSATTR_BLINK; } if ((flags & WSATTR_REVERSE) && !(edp->scrcapabilities & WSSCREEN_REVERSE)) { flags &= ~WSATTR_REVERSE; if (edp->scrcapabilities & WSSCREEN_WSCOLORS) { int help; help = bgcol; bgcol = fgcol; fgcol = help; flags |= WSATTR_WSCOLORS; } } error = (*edp->emulops->alloc_attr)(edp->emulcookie, fgcol, bgcol, flags, attr); if (error) return (error); return (0); } static char *sun_fkeys[] = { "\033[224z", /* F1 */ "\033[225z", "\033[226z", "\033[227z", "\033[228z", "\033[229z", "\033[230z", "\033[231z", "\033[232z", "\033[233z", "\033[234z", "\033[235z", /* F12 */ }; static char *sun_lkeys[] = { "\033[207z", /* KS_Help */ NULL, /* KS_Execute */ "\033[200z", /* KS_Find */ NULL, /* KS_Select */ "\033[193z", /* KS_Again */ "\033[194z", /* KS_Props */ "\033[195z", /* KS_Undo */ "\033[196z", /* KS_Front */ "\033[197z", /* KS_Copy */ "\033[198z", /* KS_Open */ "\033[199z", /* KS_Paste */ "\033[201z", /* KS_Cut */ }; int wsemul_sun_translate(cookie, in, out) void *cookie; keysym_t in; char **out; { static char c; if (KS_GROUP(in) == KS_GROUP_Keypad && (in & 0x80) == 0) { c = in & 0xff; /* turn into ASCII */ *out = &c; return (1); } if (in >= KS_f1 && in <= KS_f12) { *out = sun_fkeys[in - KS_f1]; return (6); } if (in >= KS_F1 && in <= KS_F12) { *out = sun_fkeys[in - KS_F1]; return (6); } if (in >= KS_KP_F1 && in <= KS_KP_F4) { *out = sun_fkeys[in - KS_KP_F1]; return (6); } if (in >= KS_Help && in <= KS_Cut && sun_lkeys[in - KS_Help] != NULL) { *out = sun_lkeys[in - KS_Help]; return (6); } switch (in) { case KS_Home: case KS_KP_Home: case KS_KP_Begin: *out = "\033[214z"; return (6); case KS_End: case KS_KP_End: *out = "\033[220z"; return (6); case KS_Insert: case KS_KP_Insert: *out = "\033[247z"; return (6); case KS_Prior: case KS_KP_Prior: *out = "\033[216z"; return (6); case KS_Next: case KS_KP_Next: *out = "\033[222z"; return (6); case KS_Up: case KS_KP_Up: *out = "\033[A"; return (3); case KS_Down: case KS_KP_Down: *out = "\033[B"; return (3); case KS_Left: case KS_KP_Left: *out = "\033[D"; return (3); case KS_Right: case KS_KP_Right: *out = "\033[C"; return (3); case KS_KP_Delete: *out = "\177"; return (1); } return (0); } void wsemul_sun_detach(cookie, crowp, ccolp) void *cookie; u_int *crowp, *ccolp; { struct wsemul_sun_emuldata *edp = cookie; *crowp = edp->crow; *ccolp = edp->ccol; if (edp != &wsemul_sun_console_emuldata) free(edp, M_DEVBUF); } void wsemul_sun_resetop(cookie, op) void *cookie; enum wsemul_resetops op; { struct wsemul_sun_emuldata *edp = cookie; switch (op) { case WSEMUL_RESET: wsemul_sun_reset(edp); break; case WSEMUL_CLEARSCREEN: (*edp->emulops->eraserows)(edp->emulcookie, 0, edp->nrows, edp->bkgdattr); edp->ccol = edp->crow = 0; (*edp->emulops->cursor)(edp->emulcookie, 1, 0, 0); break; default: break; } } void wsemul_sun_scrollup(edp, lines) struct wsemul_sun_emuldata *edp; u_int lines; { /* * if we're in wrap-around mode, go to the first * line and clear it. */ if (lines == 0) { edp->crow = 0; (*edp->emulops->eraserows)(edp->emulcookie, 0, 1, edp->bkgdattr); return; } /* * If the scrolling distance is equal to the screen height * (usually 34), clear the screen; otherwise, scroll by the * scrolling distance. */ if (lines < edp->nrows) (*edp->emulops->copyrows)(edp->emulcookie, lines, 0, edp->nrows - lines); (*edp->emulops->eraserows)(edp->emulcookie, edp->nrows - lines, lines, edp->bkgdattr); edp->crow -= lines - 1; }