init.c revision 1.25
1 /* $NetBSD: init.c,v 1.25 2010/05/27 05:52:29 dholland 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 1.25 2010/05/27 05:52:29 dholland 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 'n': return (N); 235 case 'r': return (R); 236 default: return (0); 237 } 238 } 239 240 /* 241 * Replace historic +SPEC arguments with appropriate -kSPEC. 242 */ 243 void 244 fixit(int *argc, char **argv) 245 { 246 int i, j, fplus=0; 247 char *vpos, *tpos, spec[20]; 248 int col, indent; 249 size_t sz; 250 251 for (i = 1; i < *argc; i++) { 252 /* 253 * Stop where getopt will stop, to avoid turning e.g. 254 * "sort x +3" into "sort x -k4.1" which will croak if 255 * +3 was in fact really a file name. 256 */ 257 if (argv[i][0] == '-' && argv[i][1] == '-') 258 break; 259 if (argv[i][0] != '-' && argv[i][0] != '+') 260 break; 261 262 if (argv[i][0] != '+' && !fplus) 263 continue; 264 265 if (fplus && (argv[i][0] != '-' || !isdigit((unsigned char)argv[i][1]))) { 266 fplus = 0; 267 if (argv[i][0] != '+') { 268 /* not a -POS argument, skip */ 269 continue; 270 } 271 } 272 273 /* parse spec */ 274 tpos = argv[i]+1; 275 col = (int)strtol(tpos, &tpos, 10); 276 if (*tpos == '.') { 277 ++tpos; 278 indent = (int) strtol(tpos, &tpos, 10); 279 } else 280 indent = 0; 281 /* tpos points to optional flags now */ 282 283 /* 284 * For x.y, the obsolescent variant assumed 0 == beginning 285 * of line, while the new form uses 0 == end of line. 286 * Convert accordingly. 287 */ 288 if (!fplus) { 289 /* +POS */ 290 col += 1; 291 indent += 1; 292 } else { 293 /* -POS */ 294 if (indent > 0) 295 col += 1; 296 } 297 298 /* new style spec */ 299 sz = snprintf(spec, sizeof(spec), "%d.%d%s", col, indent, 300 tpos); 301 302 if (!fplus) { 303 /* Replace the +POS argument with new-style -kSPEC */ 304 asprintf(&vpos, "-k%s", spec); 305 argv[i] = vpos; 306 fplus = 1; 307 } else { 308 /* 309 * Append the spec to one previously generated from 310 * +POS argument, and remove the argv element. 311 */ 312 asprintf(&vpos, "%s,%s", argv[i-1], spec); 313 free(argv[i-1]); 314 argv[i-1] = vpos; 315 for (j=i; j < *argc; j++) 316 argv[j] = argv[j+1]; 317 *argc -= 1; 318 i--; 319 } 320 } 321 } 322 323 /* 324 * ascii, Rascii, Ftable, and RFtable map 325 * 326 * Sorting 'weight' tables. 327 * Convert 'ascii' characters into their sort order. 328 * The 'F' variants fold lower case to upper equivalent 329 * The 'R' variants are for reverse sorting. 330 * 331 * The record separator (REC_D) never needs a weight, this frees one 332 * byte value as an 'end of key' marker. This must be 0 for normal 333 * weight tables, and 0xff for reverse weight tables - and is used 334 * to terminate keys so that short keys sort before (after if reverse) 335 * longer keys. 336 * 337 * The field separator has a normal weight - although it cannot occur 338 * within a key unless it is the default (space+tab). 339 * 340 * All other bytes map to the appropriate value for the sort order. 341 * Numeric sorts don't need any tables, they are reversed by negation. 342 * 343 * Global reverse sorts are done by writing the sorted keys in reverse 344 * order - the sort itself is stil forwards. 345 * This means that weights are only ever used when generating keys, any 346 * sort of the original data bytes is always forwards and unweighted. 347 * 348 * Note: this is only good for ASCII sorting. For different LC 's, 349 * all bets are off. 350 * 351 * itable[] and dtable[] are the masks for -i (ignore non-printables) 352 * and -d (only sort blank and alphanumerics). 353 */ 354 void 355 settables(void) 356 { 357 int i; 358 int next_weight = 1; 359 int rev_weight = 254; 360 361 ascii[REC_D] = 0; 362 Rascii[REC_D] = 255; 363 Ftable[REC_D] = 0; 364 RFtable[REC_D] = 255; 365 366 for (i = 0; i < 256; i++) { 367 if (i == REC_D) 368 continue; 369 ascii[i] = next_weight; 370 Rascii[i] = rev_weight; 371 if (Ftable[i] == 0) { 372 Ftable[i] = next_weight; 373 RFtable[i] = rev_weight; 374 Ftable[tolower(i)] = next_weight; 375 RFtable[tolower(i)] = rev_weight; 376 } 377 next_weight++; 378 rev_weight--; 379 380 if (i == '\n' || isprint(i)) 381 itable[i] = 1; 382 383 if (i == '\n' || i == '\t' || i == ' ' || isalnum(i)) 384 dtable[i] = 1; 385 } 386 } 387
Indexes created Wed Sep 24 05:09:52 GMT 2025