Annotation of sys/dev/wscons/wsemul_dumb.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: wsemul_dumb.c,v 1.4 2007/03/07 06:23:04 miod Exp $ */
! 2: /* $NetBSD: wsemul_dumb.c,v 1.7 2000/01/05 11:19:36 drochner Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Christopher G. Demetriou
! 18: * for the NetBSD Project.
! 19: * 4. The name of the author may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: #include <sys/cdefs.h>
! 35:
! 36: #include <sys/param.h>
! 37: #include <sys/systm.h>
! 38: #include <sys/time.h>
! 39: #include <sys/malloc.h>
! 40: #include <sys/fcntl.h>
! 41:
! 42: #include <dev/wscons/wsconsio.h>
! 43: #include <dev/wscons/wsdisplayvar.h>
! 44: #include <dev/wscons/wsemulvar.h>
! 45: #include <dev/wscons/ascii.h>
! 46:
! 47: void *wsemul_dumb_cnattach(const struct wsscreen_descr *, void *,
! 48: int, int, long);
! 49: void *wsemul_dumb_attach(int console, const struct wsscreen_descr *,
! 50: void *, int, int, void *, long);
! 51: void wsemul_dumb_output(void *cookie, const u_char *data, u_int count,
! 52: int);
! 53: int wsemul_dumb_translate(void *cookie, keysym_t, char **);
! 54: void wsemul_dumb_detach(void *cookie, u_int *crowp, u_int *ccolp);
! 55: void wsemul_dumb_resetop(void *, enum wsemul_resetops);
! 56:
! 57: const struct wsemul_ops wsemul_dumb_ops = {
! 58: "dumb",
! 59: wsemul_dumb_cnattach,
! 60: wsemul_dumb_attach,
! 61: wsemul_dumb_output,
! 62: wsemul_dumb_translate,
! 63: wsemul_dumb_detach,
! 64: wsemul_dumb_resetop
! 65: };
! 66:
! 67: struct wsemul_dumb_emuldata {
! 68: const struct wsdisplay_emulops *emulops;
! 69: void *emulcookie;
! 70: void *cbcookie;
! 71: int crippled;
! 72: u_int nrows, ncols, crow, ccol;
! 73: long defattr;
! 74: };
! 75:
! 76: struct wsemul_dumb_emuldata wsemul_dumb_console_emuldata;
! 77:
! 78: void *
! 79: wsemul_dumb_cnattach(type, cookie, ccol, crow, defattr)
! 80: const struct wsscreen_descr *type;
! 81: void *cookie;
! 82: int ccol, crow;
! 83: long defattr;
! 84: {
! 85: struct wsemul_dumb_emuldata *edp;
! 86: const struct wsdisplay_emulops *emulops;
! 87:
! 88: edp = &wsemul_dumb_console_emuldata;
! 89:
! 90: edp->emulops = emulops = type->textops;
! 91: edp->emulcookie = cookie;
! 92: edp->nrows = type->nrows;
! 93: edp->ncols = type->ncols;
! 94: edp->crow = crow;
! 95: edp->ccol = ccol;
! 96: edp->defattr = defattr;
! 97: edp->cbcookie = NULL;
! 98: edp->crippled = emulops->cursor == NULL ||
! 99: emulops->copycols == NULL || emulops->copyrows == NULL ||
! 100: emulops->erasecols == NULL || emulops->eraserows == NULL;
! 101:
! 102: return (edp);
! 103: }
! 104:
! 105: void *
! 106: wsemul_dumb_attach(console, type, cookie, ccol, crow, cbcookie, defattr)
! 107: int console;
! 108: const struct wsscreen_descr *type;
! 109: void *cookie;
! 110: int ccol, crow;
! 111: void *cbcookie;
! 112: long defattr;
! 113: {
! 114: struct wsemul_dumb_emuldata *edp;
! 115:
! 116: if (console)
! 117: edp = &wsemul_dumb_console_emuldata;
! 118: else {
! 119: edp = malloc(sizeof *edp, M_DEVBUF, M_WAITOK);
! 120:
! 121: edp->emulops = type->textops;
! 122: edp->emulcookie = cookie;
! 123: edp->nrows = type->nrows;
! 124: edp->ncols = type->ncols;
! 125: edp->crow = crow;
! 126: edp->ccol = ccol;
! 127: edp->defattr = defattr;
! 128: }
! 129:
! 130: edp->cbcookie = cbcookie;
! 131:
! 132: return (edp);
! 133: }
! 134:
! 135: void
! 136: wsemul_dumb_output(cookie, data, count, kernel)
! 137: void *cookie;
! 138: const u_char *data;
! 139: u_int count;
! 140: int kernel; /* ignored */
! 141: {
! 142: struct wsemul_dumb_emuldata *edp = cookie;
! 143: u_char c;
! 144: int n;
! 145:
! 146: if (edp->crippled) {
! 147: while (count-- > 0) {
! 148: c = *data++;
! 149:
! 150: if (c == ASCII_BEL)
! 151: wsdisplay_emulbell(edp->cbcookie);
! 152: else
! 153: (*edp->emulops->putchar)(edp->emulcookie, 0,
! 154: 0, c, 0);
! 155: }
! 156: return;
! 157: }
! 158:
! 159: /* XXX */
! 160: (*edp->emulops->cursor)(edp->emulcookie, 0, edp->crow, edp->ccol);
! 161: while (count-- > 0) {
! 162: c = *data++;
! 163:
! 164: switch (c) {
! 165: case ASCII_BEL:
! 166: wsdisplay_emulbell(edp->cbcookie);
! 167: break;
! 168:
! 169: case ASCII_BS:
! 170: if (edp->ccol > 0)
! 171: edp->ccol--;
! 172: break;
! 173:
! 174: case ASCII_CR:
! 175: edp->ccol = 0;
! 176: break;
! 177:
! 178: case ASCII_HT:
! 179: n = min(8 - (edp->ccol & 7),
! 180: edp->ncols - edp->ccol - 1);
! 181: (*edp->emulops->erasecols)(edp->emulcookie,
! 182: edp->crow, edp->ccol, n, edp->defattr);
! 183: edp->ccol += n;
! 184: break;
! 185:
! 186: case ASCII_FF:
! 187: (*edp->emulops->eraserows)(edp->emulcookie, 0,
! 188: edp->nrows, edp->defattr);
! 189: edp->ccol = 0;
! 190: edp->crow = 0;
! 191: break;
! 192:
! 193: case ASCII_VT:
! 194: if (edp->crow > 0)
! 195: edp->crow--;
! 196: break;
! 197:
! 198: default:
! 199: (*edp->emulops->putchar)(edp->emulcookie, edp->crow,
! 200: edp->ccol, c, edp->defattr);
! 201: edp->ccol++;
! 202:
! 203: /* if cur col is still on cur line, done. */
! 204: if (edp->ccol < edp->ncols)
! 205: break;
! 206:
! 207: /* wrap the column around. */
! 208: edp->ccol = 0;
! 209:
! 210: /* FALLTHROUGH */
! 211:
! 212: case ASCII_LF:
! 213: /* if the cur line isn't the last, incr and leave. */
! 214: if (edp->crow < edp->nrows - 1) {
! 215: edp->crow++;
! 216: break;
! 217: }
! 218: n = 1; /* number of lines to scroll */
! 219: (*edp->emulops->copyrows)(edp->emulcookie, n, 0,
! 220: edp->nrows - n);
! 221: (*edp->emulops->eraserows)(edp->emulcookie,
! 222: edp->nrows - n, n, edp->defattr);
! 223: edp->crow -= n - 1;
! 224: break;
! 225: }
! 226: }
! 227: /* XXX */
! 228: (*edp->emulops->cursor)(edp->emulcookie, 1, edp->crow, edp->ccol);
! 229: }
! 230:
! 231: int
! 232: wsemul_dumb_translate(cookie, in, out)
! 233: void *cookie;
! 234: keysym_t in;
! 235: char **out;
! 236: {
! 237: return (0);
! 238: }
! 239:
! 240: void
! 241: wsemul_dumb_detach(cookie, crowp, ccolp)
! 242: void *cookie;
! 243: u_int *crowp, *ccolp;
! 244: {
! 245: struct wsemul_dumb_emuldata *edp = cookie;
! 246:
! 247: *crowp = edp->crow;
! 248: *ccolp = edp->ccol;
! 249: if (edp != &wsemul_dumb_console_emuldata)
! 250: free(edp, M_DEVBUF);
! 251: }
! 252:
! 253: void
! 254: wsemul_dumb_resetop(cookie, op)
! 255: void *cookie;
! 256: enum wsemul_resetops op;
! 257: {
! 258: struct wsemul_dumb_emuldata *edp = cookie;
! 259:
! 260: if (edp->crippled)
! 261: return;
! 262:
! 263: switch (op) {
! 264: case WSEMUL_CLEARSCREEN:
! 265: (*edp->emulops->eraserows)(edp->emulcookie, 0, edp->nrows,
! 266: edp->defattr);
! 267: edp->ccol = edp->crow = 0;
! 268: (*edp->emulops->cursor)(edp->emulcookie, 1, 0, 0);
! 269: break;
! 270: default:
! 271: break;
! 272: }
! 273: }
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