1 /* $NetBSD: init.c,v 1.28 2010/12/18 23:09:48 christos 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Peter McIlroy. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64 #include "sort.h" 65 66 __RCSID("$NetBSD: init.c,v 1.28 2010/12/18 23:09:48 christos Exp $"); 67 68 #include <ctype.h> 69 #include <string.h> 70 71 static void insertcol(struct field *); 72 static const char *setcolumn(const char *, struct field *); 73 74 /* 75 * masks of ignored characters. 76 */ 77 static u_char dtable[NBINS], itable[NBINS]; 78 79 /* 80 * parsed key options 81 */ 82 struct coldesc *clist = NULL; 83 int ncols = 0; 84 85 /* 86 * clist (list of columns which correspond to one or more icol or tcol) 87 * is in increasing order of columns. 88 * Fields are kept in increasing order of fields. 89 */ 90 91 /* 92 * keep clist in order--inserts a column in a sorted array 93 */ 94 static void 95 insertcol(struct field *field) 96 { 97 int i; 98 struct coldesc *p; 99 100 /* Make space for new item */ 101 p = realloc(clist, (ncols + 2) * sizeof(*clist)); 102 if (!p) 103 err(1, "realloc"); 104 clist = p; 105 memset(&clist[ncols], 0, sizeof(clist[ncols])); 106 107 for (i = 0; i < ncols; i++) 108 if (field->icol.num <= clist[i].num) 109 break; 110 if (field->icol.num != clist[i].num) { 111 memmove(clist+i+1, clist+i, sizeof(COLDESC)*(ncols-i)); 112 clist[i].num = field->icol.num; 113 ncols++; 114 } 115 if (field->tcol.num && field->tcol.num != field->icol.num) { 116 for (i = 0; i < ncols; i++) 117 if (field->tcol.num <= clist[i].num) 118 break; 119 if (field->tcol.num != clist[i].num) { 120 memmove(clist+i+1, clist+i,sizeof(COLDESC)*(ncols-i)); 121 clist[i].num = field->tcol.num; 122 ncols++; 123 } 124 } 125 } 126 127 /* 128 * matches fields with the appropriate columns--n^2 but who cares? 129 */ 130 void 131 fldreset(struct field *fldtab) 132 { 133 int i; 134 135 fldtab[0].tcol.p = clist + ncols - 1; 136 for (++fldtab; fldtab->icol.num; ++fldtab) { 137 for (i = 0; fldtab->icol.num != clist[i].num; i++) 138 ; 139 fldtab->icol.p = clist + i; 140 if (!fldtab->tcol.num) 141 continue; 142 for (i = 0; fldtab->tcol.num != clist[i].num; i++) 143 ; 144 fldtab->tcol.p = clist + i; 145 } 146 } 147 148 /* 149 * interprets a column in a -k field 150 */ 151 static const char * 152 setcolumn(const char *pos, struct field *cur_fld) 153 { 154 struct column *col; 155 char *npos; 156 int tmp; 157 col = cur_fld->icol.num ? (&cur_fld->tcol) : (&cur_fld->icol); 158 col->num = (int) strtol(pos, &npos, 10); 159 pos = npos; 160 if (col->num <= 0 && !(col->num == 0 && col == &(cur_fld->tcol))) 161 errx(2, "field numbers must be positive"); 162 if (*pos == '.') { 163 if (!col->num) 164 errx(2, "cannot indent end of line"); 165 ++pos; 166 col->indent = (int) strtol(pos, &npos, 10); 167 pos = npos; 168 if (&cur_fld->icol == col) 169 col->indent--; 170 if (col->indent < 0) 171 errx(2, "illegal offset"); 172 } 173 for(; (tmp = optval(*pos, cur_fld->tcol.num)); pos++) 174 cur_fld->flags |= tmp; 175 if (cur_fld->icol.num == 0) 176 cur_fld->icol.num = 1; 177 return (pos); 178 } 179 180 int 181 setfield(const char *pos, struct field *cur_fld, int gflag) 182 { 183 cur_fld->mask = NULL; 184 185 pos = setcolumn(pos, cur_fld); 186 if (*pos == '\0') /* key extends to EOL. */ 187 cur_fld->tcol.num = 0; 188 else { 189 if (*pos != ',') 190 errx(2, "illegal field descriptor"); 191 setcolumn((++pos), cur_fld); 192 } 193 if (!cur_fld->flags) 194 cur_fld->flags = gflag; 195 if (REVERSE) 196 /* A local 'r' doesn't invert the global one */ 197 cur_fld->flags &= ~R; 198 199 /* Assign appropriate mask table and weight table. */ 200 cur_fld->weights = weight_tables[cur_fld->flags & (R | F)]; 201 if (cur_fld->flags & I) 202 cur_fld->mask = itable; 203 else if (cur_fld->flags & D) 204 cur_fld->mask = dtable; 205 206 cur_fld->flags |= (gflag & (BI | BT)); 207 if (!cur_fld->tcol.indent) /* BT has no meaning at end of field */ 208 cur_fld->flags &= ~BT; 209 210 if (cur_fld->tcol.num 211 && !(!(cur_fld->flags & BI) && cur_fld->flags & BT) 212 && (cur_fld->tcol.num <= cur_fld->icol.num 213 /* indent if 0 -> end of field, i.e. okay */ 214 && cur_fld->tcol.indent != 0 215 && cur_fld->tcol.indent < cur_fld->icol.indent)) 216 errx(2, "fields out of order"); 217 218 insertcol(cur_fld); 219 return (cur_fld->tcol.num); 220 } 221 222 int 223 optval(int desc, int tcolflag) 224 { 225 switch(desc) { 226 case 'b': 227 if (!tcolflag) 228 return BI; 229 else 230 return BT; 231 case 'd': return D; 232 case 'f': return F; 233 case 'i': return I; 234 case 'l': return L; 235 case 'n': return N; 236 case 'r': return R; 237 default: return 0; 238 } 239 } 240 241 /* 242 * Return true if the options found in ARG, according to the getopt 243 * spec in OPTS, require an additional argv word as an option 244 * argument. 245 */ 246 static int 247 options_need_argument(const char *arg, const char *opts) 248 { 249 size_t pos; 250 const char *s; 251 252 /*assert(arg[0] == '-');*/ 253 254 pos = 1; 255 while (arg[pos]) { 256 s = strchr(opts, arg[pos]); 257 if (s == NULL) { 258 /* invalid option */ 259 return 0; 260 } 261 if (s[1] == ':') { 262 /* option requires argument */ 263 if (arg[pos+1] == '\0') { 264 /* no argument in this arg */ 265 return 1; 266 } 267 else { 268 /* argument is in this arg; no more options */ 269 return 0; 270 } 271 } 272 pos++; 273 } 274 return 0; 275 } 276 277 /* 278 * Replace historic +SPEC arguments with appropriate -kSPEC. 279 * 280 * The form can be either a single +SPEC or a pair +SPEC -SPEC. 281 * The following -SPEC is not recognized unless it follows 282 * immediately. 283 */ 284 void 285 fixit(int *argc, char **argv, const char *opts) 286 { 287 int i, j, sawplus; 288 char *vpos, *tpos, spec[20]; 289 int col, indent; 290 size_t sz; 291 292 sawplus = 0; 293 for (i = 1; i < *argc; i++) { 294 /* 295 * This loop must stop exactly where getopt will stop. 296 * Otherwise it turns e.g. "sort x +3" into "sort x 297 * -k4.1", which will croak if +3 was in fact really a 298 * file name. In order to do this reliably we need to 299 * be able to identify argv words that are option 300 * arguments. 301 */ 302 303 if (!strcmp(argv[i], "--")) { 304 /* End of options; stop. */ 305 break; 306 } 307 308 if (argv[i][0] == '+') { 309 /* +POS argument */ 310 sawplus = 1; 311 } else if (argv[i][0] == '-' && sawplus && 312 isdigit((unsigned char)argv[i][1])) { 313 /* -POS argument */ 314 sawplus = 0; 315 } else if (argv[i][0] == '-') { 316 /* other option */ 317 sawplus = 0; 318 if (options_need_argument(argv[i], opts)) { 319 /* skip over the argument */ 320 i++; 321 } 322 continue; 323 } else { 324 /* not an option at all; stop */ 325 sawplus = 0; 326 break; 327 } 328 329 /* 330 * At this point argv[i] is an old-style spec. The 331 * sawplus flag used by the above loop logic also 332 * tells us if it's a +SPEC or -SPEC. 333 */ 334 335 /* parse spec */ 336 tpos = argv[i]+1; 337 col = (int)strtol(tpos, &tpos, 10); 338 if (*tpos == '.') { 339 ++tpos; 340 indent = (int) strtol(tpos, &tpos, 10); 341 } else 342 indent = 0; 343 /* tpos now points to the optional flags */ 344 345 /* 346 * In the traditional form, x.0 means beginning of line; 347 * in the new form, x.0 means end of line. Adjust the 348 * value of INDENT accordingly. 349 */ 350 if (sawplus) { 351 /* +POS */ 352 col += 1; 353 indent += 1; 354 } else { 355 /* -POS */ 356 if (indent > 0) 357 col += 1; 358 } 359 360 /* make the new style spec */ 361 sz = snprintf(spec, sizeof(spec), "%d.%d%s", col, indent, 362 tpos); 363 364 if (sawplus) { 365 /* Replace the +POS argument with new-style -kSPEC */ 366 asprintf(&vpos, "-k%s", spec); 367 argv[i] = vpos; 368 } else { 369 /* 370 * Append the spec to the one from the 371 * preceding +POS argument, and remove the 372 * current argv element entirely. 373 */ 374 asprintf(&vpos, "%s,%s", argv[i-1], spec); 375 free(argv[i-1]); 376 argv[i-1] = vpos; 377 for (j=i; j < *argc; j++) 378 argv[j] = argv[j+1]; 379 *argc -= 1; 380 i--; 381 } 382 } 383 } 384 385 /* 386 * ascii, Rascii, Ftable, and RFtable map 387 * 388 * Sorting 'weight' tables. 389 * Convert 'ascii' characters into their sort order. 390 * The 'F' variants fold lower case to upper equivalent 391 * The 'R' variants are for reverse sorting. 392 * 393 * The record separator (REC_D) never needs a weight, this frees one 394 * byte value as an 'end of key' marker. This must be 0 for normal 395 * weight tables, and 0xff for reverse weight tables - and is used 396 * to terminate keys so that short keys sort before (after if reverse) 397 * longer keys. 398 * 399 * The field separator has a normal weight - although it cannot occur 400 * within a key unless it is the default (space+tab). 401 * 402 * All other bytes map to the appropriate value for the sort order. 403 * Numeric sorts don't need any tables, they are reversed by negation. 404 * 405 * Global reverse sorts are done by writing the sorted keys in reverse 406 * order - the sort itself is stil forwards. 407 * This means that weights are only ever used when generating keys, any 408 * sort of the original data bytes is always forwards and unweighted. 409 * 410 * Note: this is only good for ASCII sorting. For different LC 's, 411 * all bets are off. 412 * 413 * itable[] and dtable[] are the masks for -i (ignore non-printables) 414 * and -d (only sort blank and alphanumerics). 415 */ 416 void 417 settables(void) 418 { 419 int i; 420 int next_weight = 1; 421 int rev_weight = 254; 422 423 ascii[REC_D] = 0; 424 Rascii[REC_D] = 255; 425 Ftable[REC_D] = 0; 426 RFtable[REC_D] = 255; 427 428 for (i = 0; i < 256; i++) { 429 if (i == REC_D) 430 continue; 431 ascii[i] = next_weight; 432 Rascii[i] = rev_weight; 433 if (Ftable[i] == 0) { 434 Ftable[i] = next_weight; 435 RFtable[i] = rev_weight; 436 Ftable[tolower(i)] = next_weight; 437 RFtable[tolower(i)] = rev_weight; 438 } 439 next_weight++; 440 rev_weight--; 441 442 if (i == '\n' || isprint(i)) 443 itable[i] = 1; 444 445 if (i == '\n' || i == '\t' || i == ' ' || isalnum(i)) 446 dtable[i] = 1; 447 } 448 } 449