1 /* $NetBSD: wwwrite.c,v 1.9 2009/04/14 08:50:06 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Edward Wang at The University of California, Berkeley. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)wwwrite.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: wwwrite.c,v 1.9 2009/04/14 08:50:06 lukem Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include "ww.h" 45 #include "tt.h" 46 #include "xx.h" 47 #include "char.h" 48 49 #define UPDATE() \ 50 if (!ISSET(w->ww_wflags, WWW_NOUPDATE) && w->ww_cur.r >= 0 && \ 51 w->ww_cur.r < wwnrow && wwtouched[w->ww_cur.r]) \ 52 wwupdate1(w->ww_cur.r, w->ww_cur.r + 1) 53 54 /* 55 * To support control character expansion, we save the old 56 * p and q values in r and s, and point p at the beginning 57 * of the expanded string, and q at some safe place beyond it 58 * (p + 10). At strategic points in the loops, we check 59 * for (r && !*p) and restore the saved values back into 60 * p and q. Essentially, we implement a stack of depth 2, 61 * to avoid recursion, which might be a better idea. 62 */ 63 int 64 wwwrite(struct ww *w, const char *p, int n) 65 { 66 int hascursor; 67 const char *savep = p; 68 const char *q = p + n; 69 const char *r = 0; 70 const char *s = 0; 71 72 #ifdef lint 73 s = 0; /* define it before possible use */ 74 #endif 75 hascursor = ISSET(w->ww_wflags, WWW_HASCURSOR); 76 if (hascursor) 77 wwcursor(w, 0); 78 while (p < q && !ISSET(w->ww_pflags, WWP_STOPPED) && 79 (!wwinterrupt() || ISSET(w->ww_wflags, WWW_NOINTR))) { 80 if (r && !*p) { 81 p = r; 82 q = s; 83 r = 0; 84 continue; 85 } 86 if (w->ww_wstate == 0 && 87 (isprt(*p) || 88 (ISSET(w->ww_wflags, WWW_UNCTRL) && isunctrl(*p)))) { 89 int i; 90 union ww_char *bp; 91 int col, col1; 92 93 if (ISSET(w->ww_wflags, WWW_INSERT)) { 94 /* this is very slow */ 95 if (*p == '\t') { 96 p++; 97 w->ww_cur.c += 8 - 98 ((w->ww_cur.c - w->ww_w.l) & 7); 99 goto chklf; 100 } 101 if (!isprt(*p)) { 102 r = p + 1; 103 s = q; 104 p = unctrl(*p); 105 q = p + 10; 106 } 107 wwinschar(w, w->ww_cur.r, w->ww_cur.c, 108 *p++, w->ww_modes); 109 goto right; 110 } 111 112 bp = &w->ww_buf[w->ww_cur.r][w->ww_cur.c]; 113 i = w->ww_cur.c; 114 while (i < w->ww_w.r && p < q) 115 if (!*p && r) { 116 p = r; 117 q = s; 118 r = 0; 119 } else if (*p == '\t') { 120 int tmp = 8 - ((i - w->ww_w.l) & 7); 121 p++; 122 i += tmp; 123 bp += tmp; 124 } else if (isprt(*p)) { 125 bp++->c_w = *p++ 126 | w->ww_modes << WWC_MSHIFT; 127 i++; 128 } else if (ISSET(w->ww_wflags, WWW_UNCTRL) && 129 isunctrl(*p)) { 130 r = p + 1; 131 s = q; 132 p = unctrl(*p); 133 q = p + 10; 134 } else 135 break; 136 col = MAX(w->ww_cur.c, w->ww_i.l); 137 col1 = MIN(i, w->ww_i.r); 138 w->ww_cur.c = i; 139 if (w->ww_cur.r >= w->ww_i.t 140 && w->ww_cur.r < w->ww_i.b) { 141 union ww_char *ns = wwns[w->ww_cur.r]; 142 unsigned char *smap = 143 &wwsmap[w->ww_cur.r][col]; 144 char *win = w->ww_win[w->ww_cur.r]; 145 int nchanged = 0; 146 147 bp = w->ww_buf[w->ww_cur.r]; 148 for (i = col; i < col1; i++) 149 if (*smap++ == w->ww_index) { 150 nchanged++; 151 ns[i].c_w = bp[i].c_w 152 ^ win[i] << WWC_MSHIFT; 153 } 154 if (nchanged > 0) 155 wwtouched[w->ww_cur.r] |= WWU_TOUCHED; 156 } 157 chklf: 158 if (w->ww_cur.c >= w->ww_w.r) 159 goto crlf; 160 } else switch (w->ww_wstate) { 161 case 0: 162 switch (*p++) { 163 case '\n': 164 if (ISSET(w->ww_wflags, WWW_MAPNL)) 165 crlf: 166 w->ww_cur.c = w->ww_w.l; 167 lf: 168 UPDATE(); 169 if (++w->ww_cur.r >= w->ww_w.b) { 170 w->ww_cur.r = w->ww_w.b - 1; 171 if (w->ww_w.b < w->ww_b.b) { 172 (void) wwscroll1(w, w->ww_i.t, 173 w->ww_i.b, 1, 0); 174 w->ww_buf++; 175 w->ww_b.t--; 176 w->ww_b.b--; 177 } else 178 wwdelline(w, w->ww_b.t); 179 } 180 break; 181 case '\b': 182 if (--w->ww_cur.c < w->ww_w.l) { 183 w->ww_cur.c = w->ww_w.r - 1; 184 goto up; 185 } 186 break; 187 case '\r': 188 w->ww_cur.c = w->ww_w.l; 189 break; 190 case ctrl('g'): 191 ttputc(ctrl('g')); 192 break; 193 case ctrl('['): 194 w->ww_wstate = 1; 195 break; 196 } 197 break; 198 case 1: 199 w->ww_wstate = 0; 200 switch (*p++) { 201 case '@': 202 SET(w->ww_wflags, WWW_INSERT); 203 break; 204 case 'A': 205 up: 206 UPDATE(); 207 if (--w->ww_cur.r < w->ww_w.t) { 208 w->ww_cur.r = w->ww_w.t; 209 if (w->ww_w.t > w->ww_b.t) { 210 (void) wwscroll1(w, w->ww_i.t, 211 w->ww_i.b, -1, 0); 212 w->ww_buf--; 213 w->ww_b.t++; 214 w->ww_b.b++; 215 } else 216 wwinsline(w, w->ww_b.t); 217 } 218 break; 219 case 'B': 220 goto lf; 221 case 'C': 222 right: 223 w->ww_cur.c++; 224 goto chklf; 225 case 'E': 226 w->ww_buf -= w->ww_w.t - w->ww_b.t; 227 w->ww_b.t = w->ww_w.t; 228 w->ww_b.b = w->ww_b.t + w->ww_b.nr; 229 w->ww_cur.r = w->ww_w.t; 230 w->ww_cur.c = w->ww_w.l; 231 wwclreos(w, w->ww_w.t, w->ww_w.l); 232 break; 233 case 'H': 234 UPDATE(); 235 w->ww_cur.r = w->ww_w.t; 236 w->ww_cur.c = w->ww_w.l; 237 break; 238 case 'J': 239 wwclreos(w, w->ww_cur.r, w->ww_cur.c); 240 break; 241 case 'K': 242 wwclreol(w, w->ww_cur.r, w->ww_cur.c); 243 break; 244 case 'L': 245 UPDATE(); 246 wwinsline(w, w->ww_cur.r); 247 break; 248 case 'M': 249 wwdelline(w, w->ww_cur.r); 250 break; 251 case 'N': 252 wwdelchar(w, w->ww_cur.r, w->ww_cur.c); 253 break; 254 case 'O': 255 CLR(w->ww_wflags, WWW_INSERT); 256 break; 257 case 'P': 258 wwinschar(w, w->ww_cur.r, w->ww_cur.c, ' ', 0); 259 break; 260 case 'X': 261 wwupdate(); 262 break; 263 case 'Y': 264 UPDATE(); 265 w->ww_wstate = 2; 266 break; 267 case 'Z': 268 wwupdate(); 269 xxflush(0); 270 break; 271 case 's': 272 w->ww_wstate = 4; 273 break; 274 case 'r': 275 w->ww_wstate = 5; 276 break; 277 } 278 break; 279 case 2: 280 w->ww_cur.r = w->ww_w.t + 281 (unsigned)(*p++ - ' ') % w->ww_w.nr; 282 w->ww_wstate = 3; 283 break; 284 case 3: 285 w->ww_cur.c = w->ww_w.l + 286 (unsigned)(*p++ - ' ') % w->ww_w.nc; 287 w->ww_wstate = 0; 288 break; 289 case 4: 290 w->ww_modes |= *p++ & wwavailmodes; 291 w->ww_wstate = 0; 292 break; 293 case 5: 294 w->ww_modes &= ~*p++; 295 w->ww_wstate = 0; 296 break; 297 } 298 } 299 if (hascursor) 300 wwcursor(w, 1); 301 wwnwwr++; 302 wwnwwra += n; 303 n = p - savep; 304 wwnwwrc += n; 305 return n; 306 } 307