| 1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)n9.c 2.1 (CWI) 85/07/18"; |
| 3 | #endif lint |
| 4 | #include "tdef.h" |
| 5 | #ifdef NROFF |
| 6 | #include "tw.h" |
| 7 | #endif |
| 8 | #include <sgtty.h> |
| 9 | #include "ext.h" |
| 10 | |
| 11 | /* |
| 12 | * troff9.c |
| 13 | * |
| 14 | * misc functions |
| 15 | */ |
| 16 | |
| 17 | tchar setz() |
| 18 | { |
| 19 | tchar i; |
| 20 | |
| 21 | if (!ismot(i = getch())) |
| 22 | i |= ZBIT; |
| 23 | return(i); |
| 24 | } |
| 25 | |
| 26 | setline() |
| 27 | { |
| 28 | register tchar *i; |
| 29 | tchar c; |
| 30 | int length; |
| 31 | int w, cnt, delim, rem, temp; |
| 32 | tchar linebuf[NC]; |
| 33 | |
| 34 | if (ismot(c = getch())) |
| 35 | return; |
| 36 | delim = cbits(c); |
| 37 | vflag = 0; |
| 38 | dfact = EM; |
| 39 | length = quant(atoi(), HOR); |
| 40 | dfact = 1; |
| 41 | if (!length) { |
| 42 | eat(delim); |
| 43 | return; |
| 44 | } |
| 45 | s0: |
| 46 | if ((cbits(c = getch())) == delim) { |
| 47 | ch = c; |
| 48 | c = RULE | chbits; |
| 49 | } else if (cbits(c) == FILLER) |
| 50 | goto s0; |
| 51 | w = width(c); |
| 52 | i = linebuf; |
| 53 | if (length < 0) { |
| 54 | *i++ = makem(length); |
| 55 | length = -length; |
| 56 | } |
| 57 | if (!(cnt = length / w)) { |
| 58 | *i++ = makem(-(temp = ((w - length) / 2))); |
| 59 | *i++ = c; |
| 60 | *i++ = makem(-(w - length - temp)); |
| 61 | goto s1; |
| 62 | } |
| 63 | if (rem = length % w) { |
| 64 | if (cbits(c) == RULE || cbits(c) == UNDERLINE || cbits(c) == ROOTEN) |
| 65 | *i++ = c | ZBIT; |
| 66 | *i++ = makem(rem); |
| 67 | } |
| 68 | if (cnt) { |
| 69 | *i++ = RPT; |
| 70 | *i++ = cnt; |
| 71 | *i++ = c; |
| 72 | } |
| 73 | s1: |
| 74 | *i++ = 0; |
| 75 | eat(delim); |
| 76 | pushback(linebuf); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | eat(c) |
| 81 | register int c; |
| 82 | { |
| 83 | register i; |
| 84 | |
| 85 | while ((i = cbits(getch())) != c && (i != '\n')) |
| 86 | ; |
| 87 | return(i); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | setov() |
| 92 | { |
| 93 | register j, k; |
| 94 | tchar i, o[NOV]; |
| 95 | int delim, w[NOV]; |
| 96 | |
| 97 | if (ismot(i = getch())) |
| 98 | return; |
| 99 | delim = cbits(i); |
| 100 | for (k = 0; (k < NOV) && ((j = cbits(i = getch())) != delim) && (j != '\n'); k++) { |
| 101 | o[k] = i; |
| 102 | w[k] = width(i); |
| 103 | } |
| 104 | o[k] = w[k] = 0; |
| 105 | if (o[0]) |
| 106 | for (j = 1; j; ) { |
| 107 | j = 0; |
| 108 | for (k = 1; o[k] ; k++) { |
| 109 | if (w[k-1] < w[k]) { |
| 110 | j++; |
| 111 | i = w[k]; |
| 112 | w[k] = w[k-1]; |
| 113 | w[k-1] = i; |
| 114 | i = o[k]; |
| 115 | o[k] = o[k-1]; |
| 116 | o[k-1] = i; |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | else |
| 121 | return; |
| 122 | *pbp++ = makem(w[0] / 2); |
| 123 | for (k = 0; o[k]; k++) |
| 124 | ; |
| 125 | while (k>0) { |
| 126 | k--; |
| 127 | *pbp++ = makem(-((w[k] + w[k+1]) / 2)); |
| 128 | *pbp++ = o[k]; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | |
| 133 | setbra() |
| 134 | { |
| 135 | register k; |
| 136 | tchar i, *j, dwn; |
| 137 | int cnt, delim; |
| 138 | tchar brabuf[NC]; |
| 139 | |
| 140 | if (ismot(i = getch())) |
| 141 | return; |
| 142 | delim = cbits(i); |
| 143 | j = brabuf + 1; |
| 144 | cnt = 0; |
| 145 | #ifdef NROFF |
| 146 | dwn = (2 * t.Halfline) | MOT | VMOT; |
| 147 | #endif |
| 148 | #ifndef NROFF |
| 149 | dwn = EM | MOT | VMOT; |
| 150 | #endif |
| 151 | while (((k = cbits(i = getch())) != delim) && (k != '\n') && (j <= (brabuf + NC - 4))) { |
| 152 | *j++ = i | ZBIT; |
| 153 | *j++ = dwn; |
| 154 | cnt++; |
| 155 | } |
| 156 | if (--cnt < 0) |
| 157 | return; |
| 158 | else if (!cnt) { |
| 159 | ch = *(j - 2); |
| 160 | return; |
| 161 | } |
| 162 | *j = 0; |
| 163 | #ifdef NROFF |
| 164 | *--j = *brabuf = (cnt * t.Halfline) | MOT | NMOT | VMOT; |
| 165 | #endif |
| 166 | #ifndef NROFF |
| 167 | *--j = *brabuf = (cnt * EM) / 2 | MOT | NMOT | VMOT; |
| 168 | #endif |
| 169 | *--j &= ~ZBIT; |
| 170 | pushback(brabuf); |
| 171 | } |
| 172 | |
| 173 | |
| 174 | setvline() |
| 175 | { |
| 176 | register i; |
| 177 | tchar c, rem, ver, neg; |
| 178 | int cnt, delim, v; |
| 179 | tchar vlbuf[NC]; |
| 180 | register tchar *vlp; |
| 181 | |
| 182 | if (ismot(c = getch())) |
| 183 | return; |
| 184 | delim = cbits(c); |
| 185 | dfact = lss; |
| 186 | vflag++; |
| 187 | i = quant(atoi(), VERT); |
| 188 | dfact = 1; |
| 189 | if (!i) { |
| 190 | eat(delim); |
| 191 | vflag = 0; |
| 192 | return; |
| 193 | } |
| 194 | if ((cbits(c = getch())) == delim) { |
| 195 | c = BOXRULE | chbits; /*default box rule*/ |
| 196 | } else |
| 197 | getch(); |
| 198 | c |= ZBIT; |
| 199 | neg = 0; |
| 200 | if (i < 0) { |
| 201 | i = -i; |
| 202 | neg = NMOT; |
| 203 | } |
| 204 | #ifdef NROFF |
| 205 | v = 2 * t.Halfline; |
| 206 | #endif |
| 207 | #ifndef NROFF |
| 208 | v = EM; |
| 209 | #endif |
| 210 | cnt = i / v; |
| 211 | rem = makem(i % v) | neg; |
| 212 | ver = makem(v) | neg; |
| 213 | vlp = vlbuf; |
| 214 | if (!neg) |
| 215 | *vlp++ = ver; |
| 216 | if (absmot(rem) != 0) { |
| 217 | *vlp++ = c; |
| 218 | *vlp++ = rem; |
| 219 | } |
| 220 | while ((vlp < (vlbuf + NC - 3)) && cnt--) { |
| 221 | *vlp++ = c; |
| 222 | *vlp++ = ver; |
| 223 | } |
| 224 | *(vlp - 2) &= ~ZBIT; |
| 225 | if (!neg) |
| 226 | vlp--; |
| 227 | *vlp++ = 0; |
| 228 | pushback(vlbuf); |
| 229 | vflag = 0; |
| 230 | } |
| 231 | |
| 232 | #define NPAIR (NC/2-6) /* max pairs in spline, etc. */ |
| 233 | |
| 234 | setdraw() /* generate internal cookies for a drawing function */ |
| 235 | { |
| 236 | int i, j, k, dx[NPAIR], dy[NPAIR], delim, type; |
| 237 | tchar c, drawbuf[NC]; |
| 238 | |
| 239 | /* input is \D'f dx dy dx dy ... c' (or at least it had better be) */ |
| 240 | /* this does drawing function f with character c and the */ |
| 241 | /* specified dx,dy pairs interpreted as appropriate */ |
| 242 | /* pairs are deltas from last point, except for radii */ |
| 243 | |
| 244 | /* l dx dy: line from here by dx,dy */ |
| 245 | /* c x: circle of diameter x, left side here */ |
| 246 | /* e x y: ellipse of diameters x,y, left side here */ |
| 247 | /* a dx1 dy1 dx2 dy2: |
| 248 | ccw arc: ctr at dx1,dy1, then end at dx2,dy2 from there */ |
| 249 | /* ~ dx1 dy1 dx2 dy2...: |
| 250 | spline to dx1,dy1 to dx2,dy2 ... */ |
| 251 | /* f dx dy ...: f is any other char: like spline */ |
| 252 | |
| 253 | if (ismot(c = getch())) |
| 254 | return; |
| 255 | delim = cbits(c); |
| 256 | type = cbits(getch()); |
| 257 | for (i = 0; i < NPAIR ; i++) { |
| 258 | c = getch(); |
| 259 | if (cbits(c) == delim) |
| 260 | break; |
| 261 | /* ought to pick up optional drawing character */ |
| 262 | if (cbits(c) != ' ') |
| 263 | ch = c; |
| 264 | vflag = 0; |
| 265 | dfact = EM; |
| 266 | dx[i] = quant(atoi(), HOR); |
| 267 | if (dx[i] > MAXMOT) |
| 268 | dx[i] = MAXMOT; |
| 269 | else if (dx[i] < -MAXMOT) |
| 270 | dx[i] = -MAXMOT; |
| 271 | if (cbits((c = getch())) == delim) { /* spacer */ |
| 272 | dy[i++] = 0; |
| 273 | break; |
| 274 | } |
| 275 | vflag = 1; |
| 276 | dfact = lss; |
| 277 | dy[i] = quant(atoi(), VERT); |
| 278 | if (dy[i] > MAXMOT) |
| 279 | dy[i] = MAXMOT; |
| 280 | else if (dy[i] < -MAXMOT) |
| 281 | dy[i] = -MAXMOT; |
| 282 | } |
| 283 | dfact = 1; |
| 284 | vflag = 0; |
| 285 | #ifndef NROFF |
| 286 | drawbuf[0] = DRAWFCN | chbits | ZBIT; |
| 287 | drawbuf[1] = type | chbits | ZBIT; |
| 288 | drawbuf[2] = '.' | chbits | ZBIT; /* use default drawing character */ |
| 289 | for (k = 0, j = 3; k < i; k++) { |
| 290 | drawbuf[j++] = MOT | ((dx[k] >= 0) ? dx[k] : (NMOT | -dx[k])); |
| 291 | drawbuf[j++] = MOT | VMOT | ((dy[k] >= 0) ? dy[k] : (NMOT | -dy[k])); |
| 292 | } |
| 293 | if (type == DRAWELLIPSE) { |
| 294 | drawbuf[5] = drawbuf[4] | NMOT; /* so the net vertical is zero */ |
| 295 | j = 6; |
| 296 | } |
| 297 | drawbuf[j++] = DRAWFCN | chbits | ZBIT; /* marks end for ptout */ |
| 298 | drawbuf[j] = 0; |
| 299 | pushback(drawbuf); |
| 300 | #endif |
| 301 | } |
| 302 | |
| 303 | |
| 304 | casefc() |
| 305 | { |
| 306 | register i; |
| 307 | tchar j; |
| 308 | |
| 309 | gchtab[fc] &= ~FCBIT; |
| 310 | fc = IMP; |
| 311 | padc = ' '; |
| 312 | if (skip() || ismot(j = getch()) || (i = cbits(j)) == '\n') |
| 313 | return; |
| 314 | fc = i; |
| 315 | gchtab[fc] |= FCBIT; |
| 316 | if (skip() || ismot(ch) || (ch = cbits(ch)) == fc) |
| 317 | return; |
| 318 | padc = ch; |
| 319 | } |
| 320 | |
| 321 | |
| 322 | tchar |
| 323 | setfield(x) |
| 324 | int x; |
| 325 | { |
| 326 | register tchar ii, jj, *fp; |
| 327 | register i, j; |
| 328 | int length, ws, npad, temp, type; |
| 329 | tchar **pp, *padptr[NPP]; |
| 330 | tchar fbuf[FBUFSZ]; |
| 331 | int savfc, savtc, savlc; |
| 332 | tchar rchar; |
| 333 | int savepos; |
| 334 | |
| 335 | if (x == tabch) |
| 336 | rchar = tabc | chbits; |
| 337 | else if (x == ldrch) |
| 338 | rchar = dotc | chbits; |
| 339 | temp = npad = ws = 0; |
| 340 | savfc = fc; |
| 341 | savtc = tabch; |
| 342 | savlc = ldrch; |
| 343 | tabch = ldrch = fc = IMP; |
| 344 | savepos = numtab[HP].val; |
| 345 | gchtab[tabch] &= ~TABBIT; |
| 346 | gchtab[ldrch] &= ~LDRBIT; |
| 347 | gchtab[fc] &= ~FCBIT; |
| 348 | gchtab[IMP] |= TABBIT|LDRBIT|FCBIT; |
| 349 | for (j = 0; ; j++) { |
| 350 | if ((tabtab[j] & TABMASK) == 0) { |
| 351 | if (x == savfc) |
| 352 | errprint("zero field width."); |
| 353 | jj = 0; |
| 354 | goto rtn; |
| 355 | } |
| 356 | if ((length = ((tabtab[j] & TABMASK) - numtab[HP].val)) > 0 ) |
| 357 | break; |
| 358 | } |
| 359 | type = tabtab[j] & (~TABMASK); |
| 360 | fp = fbuf; |
| 361 | pp = padptr; |
| 362 | if (x == savfc) { |
| 363 | while (1) { |
| 364 | j = cbits(ii = getch()); |
| 365 | jj = width(ii); |
| 366 | widthp = jj; |
| 367 | numtab[HP].val += jj; |
| 368 | if (j == padc) { |
| 369 | npad++; |
| 370 | *pp++ = fp; |
| 371 | if (pp > (padptr + NPP - 1)) |
| 372 | break; |
| 373 | goto s1; |
| 374 | } else if (j == savfc) |
| 375 | break; |
| 376 | else if (j == '\n') { |
| 377 | temp = j; |
| 378 | nlflg = 0; |
| 379 | break; |
| 380 | } |
| 381 | ws += jj; |
| 382 | s1: |
| 383 | *fp++ = ii; |
| 384 | if (fp > (fbuf + FBUFSZ - 3)) |
| 385 | break; |
| 386 | } |
| 387 | if (!npad) { |
| 388 | npad++; |
| 389 | *pp++ = fp; |
| 390 | *fp++ = 0; |
| 391 | } |
| 392 | *fp++ = temp; |
| 393 | *fp++ = 0; |
| 394 | temp = i = (j = length - ws) / npad; |
| 395 | i = (i / HOR) * HOR; |
| 396 | if ((j -= i * npad) < 0) |
| 397 | j = -j; |
| 398 | ii = makem(i); |
| 399 | if (temp < 0) |
| 400 | ii |= NMOT; |
| 401 | for (; npad > 0; npad--) { |
| 402 | *(*--pp) = ii; |
| 403 | if (j) { |
| 404 | j -= HOR; |
| 405 | (*(*pp)) += HOR; |
| 406 | } |
| 407 | } |
| 408 | pushback(fbuf); |
| 409 | jj = 0; |
| 410 | } else if (type == 0) { |
| 411 | /*plain tab or leader*/ |
| 412 | if ((j = width(rchar)) > 0) { |
| 413 | int nchar = length / j; |
| 414 | while (nchar-->0 && pbp < &pbbuf[NC-3]) { |
| 415 | numtab[HP].val += j; |
| 416 | widthp = j; |
| 417 | *pbp++ = rchar; |
| 418 | } |
| 419 | length %= j; |
| 420 | } |
| 421 | if (length) |
| 422 | jj = length | MOT; |
| 423 | else |
| 424 | jj = getch0(); |
| 425 | } else { |
| 426 | /*center tab*/ |
| 427 | /*right tab*/ |
| 428 | while (((j = cbits(ii = getch())) != savtc) && (j != '\n') && (j != savlc)) { |
| 429 | jj = width(ii); |
| 430 | ws += jj; |
| 431 | numtab[HP].val += jj; |
| 432 | widthp = jj; |
| 433 | *fp++ = ii; |
| 434 | if (fp > (fbuf + FBUFSZ - 3)) |
| 435 | break; |
| 436 | } |
| 437 | *fp++ = ii; |
| 438 | *fp++ = 0; |
| 439 | if (type == RTAB) |
| 440 | length -= ws; |
| 441 | else |
| 442 | length -= ws / 2; /*CTAB*/ |
| 443 | pushback(fbuf); |
| 444 | if ((j = width(rchar)) != 0 && length > 0) { |
| 445 | int nchar = length / j; |
| 446 | while (nchar-- > 0 && pbp < &pbbuf[NC-3]) |
| 447 | *pbp++ = rchar; |
| 448 | length %= j; |
| 449 | } |
| 450 | length = (length / HOR) * HOR; |
| 451 | jj = makem(length); |
| 452 | nlflg = 0; |
| 453 | } |
| 454 | rtn: |
| 455 | gchtab[fc] &= ~FCBIT; |
| 456 | gchtab[tabch] &= ~TABBIT; |
| 457 | gchtab[ldrch] &= ~LDRBIT; |
| 458 | fc = savfc; |
| 459 | tabch = savtc; |
| 460 | ldrch = savlc; |
| 461 | gchtab[fc] |= FCBIT; |
| 462 | gchtab[tabch] = TABBIT; |
| 463 | gchtab[ldrch] |= LDRBIT; |
| 464 | numtab[HP].val = savepos; |
| 465 | return(jj); |
| 466 | } |
| 467 | |
| 468 | |