1 /* $NetBSD: init.c,v 1.13 2004/02/17 02:31:33 itojun Exp $ */ 2 3 /*- 4 * Copyright (c) 2000-2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Ben Harris and Jaromir Dolecek. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /*- 40 * Copyright (c) 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * Peter McIlroy. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #include "sort.h" 72 73 #ifndef lint 74 __RCSID("$NetBSD: init.c,v 1.13 2004/02/17 02:31:33 itojun Exp $"); 75 __SCCSID("@(#)init.c 8.1 (Berkeley) 6/6/93"); 76 #endif /* not lint */ 77 78 #include <ctype.h> 79 #include <string.h> 80 81 static void insertcol __P((struct field *)); 82 static const char *setcolumn __P((const char *, struct field *, int)); 83 84 u_char gweights[NBINS]; 85 86 /* 87 * masks of ignored characters. Alltable is 256 ones. 88 */ 89 static u_char alltable[NBINS], dtable[NBINS], itable[NBINS]; 90 91 /* 92 * parsed key options 93 */ 94 struct coldesc *clist = NULL; 95 int ncols = 0; 96 97 /* 98 * clist (list of columns which correspond to one or more icol or tcol) 99 * is in increasing order of columns. 100 * Fields are kept in increasing order of fields. 101 */ 102 103 /* 104 * keep clist in order--inserts a column in a sorted array 105 */ 106 static void 107 insertcol(field) 108 struct field *field; 109 { 110 int i; 111 struct coldesc *p; 112 113 /* Make space for new item */ 114 p = realloc(clist, (ncols + 1) * sizeof(*clist)); 115 if (!p) 116 err(1, "realloc"); 117 clist = p; 118 memset(&clist[ncols], 0, sizeof(clist[ncols])); 119 120 for (i = 0; i < ncols; i++) 121 if (field->icol.num <= clist[i].num) 122 break; 123 if (field->icol.num != clist[i].num) { 124 memmove(clist+i+1, clist+i, sizeof(COLDESC)*(ncols-i)); 125 clist[i].num = field->icol.num; 126 ncols++; 127 } 128 if (field->tcol.num && field->tcol.num != field->icol.num) { 129 for (i = 0; i < ncols; i++) 130 if (field->tcol.num <= clist[i].num) 131 break; 132 if (field->tcol.num != clist[i].num) { 133 memmove(clist+i+1, clist+i,sizeof(COLDESC)*(ncols-i)); 134 clist[i].num = field->tcol.num; 135 ncols++; 136 } 137 } 138 } 139 140 /* 141 * matches fields with the appropriate columns--n^2 but who cares? 142 */ 143 void 144 fldreset(fldtab) 145 struct field *fldtab; 146 { 147 int i; 148 149 fldtab[0].tcol.p = clist + ncols - 1; 150 for (++fldtab; fldtab->icol.num; ++fldtab) { 151 for (i = 0; fldtab->icol.num != clist[i].num; i++) 152 ; 153 fldtab->icol.p = clist + i; 154 if (!fldtab->tcol.num) 155 continue; 156 for (i = 0; fldtab->tcol.num != clist[i].num; i++) 157 ; 158 fldtab->tcol.p = clist + i; 159 } 160 } 161 162 /* 163 * interprets a column in a -k field 164 */ 165 static const char * 166 setcolumn(pos, cur_fld, gflag) 167 const char *pos; 168 struct field *cur_fld; 169 int gflag; 170 { 171 struct column *col; 172 char *npos; 173 int tmp; 174 col = cur_fld->icol.num ? (&cur_fld->tcol) : (&cur_fld->icol); 175 col->num = (int) strtol(pos, &npos, 10); 176 pos = npos; 177 if (col->num <= 0 && !(col->num == 0 && col == &(cur_fld->tcol))) 178 errx(2, "field numbers must be positive"); 179 if (*pos == '.') { 180 if (!col->num) 181 errx(2, "cannot indent end of line"); 182 ++pos; 183 col->indent = (int) strtol(pos, &npos, 10); 184 pos = npos; 185 if (&cur_fld->icol == col) 186 col->indent--; 187 if (col->indent < 0) 188 errx(2, "illegal offset"); 189 } 190 for(; (tmp = optval(*pos, cur_fld->tcol.num)); pos++) 191 cur_fld->flags |= tmp; 192 if (cur_fld->icol.num == 0) 193 cur_fld->icol.num = 1; 194 return (pos); 195 } 196 197 int 198 setfield(pos, cur_fld, gflag) 199 const char *pos; 200 struct field *cur_fld; 201 int gflag; 202 { 203 int tmp; 204 205 cur_fld->weights = ascii; 206 cur_fld->mask = alltable; 207 208 pos = setcolumn(pos, cur_fld, gflag); 209 if (*pos == '\0') /* key extends to EOL. */ 210 cur_fld->tcol.num = 0; 211 else { 212 if (*pos != ',') 213 errx(2, "illegal field descriptor"); 214 setcolumn((++pos), cur_fld, gflag); 215 } 216 if (!cur_fld->flags) 217 cur_fld->flags = gflag; 218 tmp = cur_fld->flags; 219 220 /* 221 * Assign appropriate mask table and weight table. 222 * If the global weights are reversed, the local field 223 * must be "re-reversed". 224 */ 225 if (((tmp & R) ^ (gflag & R)) && (tmp & F)) 226 cur_fld->weights = RFtable; 227 else if (tmp & F) 228 cur_fld->weights = Ftable; 229 else if ((tmp & R) ^ (gflag & R)) 230 cur_fld->weights = Rascii; 231 232 if (tmp & I) 233 cur_fld->mask = itable; 234 else if (tmp & D) 235 cur_fld->mask = dtable; 236 237 cur_fld->flags |= (gflag & (BI | BT)); 238 if (!cur_fld->tcol.indent) /* BT has no meaning at end of field */ 239 cur_fld->flags &= ~BT; 240 241 if (cur_fld->tcol.num && !(!(cur_fld->flags & BI) 242 && cur_fld->flags & BT) && (cur_fld->tcol.num <= cur_fld->icol.num 243 && cur_fld->tcol.indent < cur_fld->icol.indent)) 244 errx(2, "fields out of order"); 245 insertcol(cur_fld); 246 return (cur_fld->tcol.num); 247 } 248 249 int 250 optval(desc, tcolflag) 251 int desc, tcolflag; 252 { 253 switch(desc) { 254 case 'b': 255 if (!tcolflag) 256 return (BI); 257 else 258 return (BT); 259 case 'd': return (D); 260 case 'f': return (F); 261 case 'i': return (I); 262 case 'n': return (N); 263 case 'r': return (R); 264 default: return (0); 265 } 266 } 267 268 /* 269 * Replace historic +SPEC arguments with appropriate -kSPEC. 270 */ 271 void 272 fixit(argc, argv) 273 int *argc; 274 char **argv; 275 { 276 int i, j, fplus=0; 277 char *vpos, *tpos, spec[20]; 278 int col, indent; 279 size_t sz; 280 281 for (i = 1; i < *argc; i++) { 282 if (argv[i][0] != '+' && !fplus) 283 continue; 284 285 if (fplus && (argv[i][0] != '-' || !isdigit(argv[i][1]))) { 286 /* not a -POS argument, skip */ 287 fplus = 0; 288 continue; 289 } 290 291 /* parse spec */ 292 tpos = argv[i]+1; 293 col = (int)strtol(tpos, &tpos, 10); 294 if (*tpos == '.') { 295 ++tpos; 296 indent = (int) strtol(tpos, &tpos, 10); 297 } else 298 indent = 0; 299 /* tpos points to optional flags now */ 300 301 /* 302 * For x.y, the obsolescent variant assumed 0 == beginning 303 * of line, while the new form uses 0 == end of line. 304 * Convert accordingly. 305 */ 306 if (!fplus) { 307 /* +POS */ 308 col += 1; 309 indent += 1; 310 } else { 311 /* -POS */ 312 if (indent > 0) 313 col += 1; 314 } 315 316 /* new style spec */ 317 sz = snprintf(spec, sizeof(spec), "%d.%d%s", col, indent, 318 tpos); 319 320 if (!fplus) { 321 /* Replace the +POS argument with new-style -kSPEC */ 322 asprintf(&vpos, "-k%s", spec); 323 argv[i] = vpos; 324 fplus = 1; 325 } else { 326 /* 327 * Append the spec to one previously generated from 328 * +POS argument, and remove the argv element. 329 */ 330 asprintf(&vpos, "%s,%s", argv[i-1], spec); 331 free(argv[i-1]); 332 argv[i-1] = vpos; 333 for (j=i; j < *argc; j++) 334 argv[j] = argv[j+1]; 335 *argc -= 1; 336 } 337 } 338 } 339 340 /* 341 * ascii, Rascii, Ftable, and RFtable map 342 * REC_D -> REC_D; {not REC_D} -> {not REC_D}. 343 * gweights maps REC_D -> (0 or 255); {not REC_D} -> {not gweights[REC_D]}. 344 * Note: when sorting in forward order, to encode character zero in a key, 345 * use \001\001; character 1 becomes \001\002. In this case, character 0 346 * is reserved for the field delimiter. Analagously for -r (fld_d = 255). 347 * Note: this is only good for ASCII sorting. For different LC 's, 348 * all bets are off. See also num_init in number.c 349 */ 350 void 351 settables(gflags) 352 int gflags; 353 { 354 u_char *wts; 355 int i, incr; 356 for (i=0; i < 256; i++) { 357 ascii[i] = i; 358 if (i > REC_D && i < 255 - REC_D+1) 359 Rascii[i] = 255 - i + 1; 360 else 361 Rascii[i] = 255 - i; 362 if (islower(i)) { 363 Ftable[i] = Ftable[toupper(i)]; 364 RFtable[i] = RFtable[toupper(i)]; 365 } else if (REC_D>= 'A' && REC_D < 'Z' && i < 'a' && i > REC_D) { 366 Ftable[i] = i + 1; 367 RFtable[i] = Rascii[i] - 1; 368 } else { 369 Ftable[i] = i; 370 RFtable[i] = Rascii[i]; 371 } 372 alltable[i] = 1; 373 374 if (i == '\n' || isprint(i)) 375 itable[i] = 1; 376 else 377 itable[i] = 0; 378 379 if (i == '\n' || i == '\t' || i == ' ' || isalnum(i)) 380 dtable[i] = 1; 381 else 382 dtable[i] = 0; 383 } 384 385 Rascii[REC_D] = RFtable[REC_D] = REC_D; 386 if (isupper(REC_D)) 387 Ftable[tolower(REC_D)]++; 388 389 if ((gflags & R) && !((gflags & F) && SINGL_FLD)) 390 wts = Rascii; 391 else if (!((gflags & F) && SINGL_FLD)) 392 wts = ascii; 393 else if (gflags & R) 394 wts = RFtable; 395 else 396 wts = Ftable; 397 398 memmove(gweights, wts, sizeof(gweights)); 399 incr = (gflags & R) ? -1 : 1; 400 for (i = 0; i < REC_D; i++) 401 gweights[i] += incr; 402 gweights[REC_D] = ((gflags & R) ? 255 : 0); 403 if (SINGL_FLD && (gflags & F)) { 404 for (i = 0; i < REC_D; i++) { 405 ascii[i] += incr; 406 Rascii[i] += incr; 407 } 408 ascii[REC_D] = Rascii[REC_D] = gweights[REC_D]; 409 } 410 } 411