usr.bin/sort/bwstring.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
   5  * Copyright (C) 2012 Oleg Moskalenko <mom040267@gmail.com>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <ctype.h>
  34 #include <errno.h>
  35 #include <err.h>
  36 #include <langinfo.h>
  37 #include <math.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <wchar.h>
  41 #include <wctype.h>
  42
  43 #include "bwstring.h"
  44 #include "sort.h"
  45
  46 bool byte_sort;
  47
  48 static wchar_t **wmonths;
  49 static char **cmonths;
  50
  51 /* initialise months */
  52
  53 void
  54 initialise_months(void)
  55 {
  56         const nl_item item[12] = { ABMON_1, ABMON_2, ABMON_3, ABMON_4,
  57             ABMON_5, ABMON_6, ABMON_7, ABMON_8, ABMON_9, ABMON_10,
  58             ABMON_11, ABMON_12 };
  59         char *tmp;
  60         size_t len;
  61
  62         if (MB_CUR_MAX == 1) {
  63                 if (cmonths == NULL) {
  64                         char *m;
  65
  66                         cmonths = sort_malloc(sizeof(char*) * 12);
  67                         for (int i = 0; i < 12; i++) {
  68                                 cmonths[i] = NULL;
  69                                 tmp = nl_langinfo(item[i]);
  70                                 if (debug_sort)
  71                                         printf("month[%d]=%s\n", i, tmp);
  72                                 if (*tmp == '\0')
  73                                         continue;
  74                                 m = sort_strdup(tmp);
  75                                 len = strlen(tmp);
  76                                 for (unsigned int j = 0; j < len; j++)
  77                                         m[j] = toupper(m[j]);
  78                                 cmonths[i] = m;
  79                         }
  80                 }
  81
  82         } else {
  83                 if (wmonths == NULL) {
  84                         wchar_t *m;
  85
  86                         wmonths = sort_malloc(sizeof(wchar_t *) * 12);
  87                         for (int i = 0; i < 12; i++) {
  88                                 wmonths[i] = NULL;
  89                                 tmp = nl_langinfo(item[i]);
  90                                 if (debug_sort)
  91                                         printf("month[%d]=%s\n", i, tmp);
  92                                 if (*tmp == '\0')
  93                                         continue;
  94                                 len = strlen(tmp);
  95                                 m = sort_malloc(SIZEOF_WCHAR_STRING(len + 1));
  96                                 if (mbstowcs(m, tmp, len) ==
  97                                     ((size_t) - 1)) {
  98                                         sort_free(m);
  99                                         continue;
 100                                 }
 101                                 m[len] = L'\0';
 102                                 for (unsigned int j = 0; j < len; j++)
 103                                         m[j] = towupper(m[j]);
 104                                 wmonths[i] = m;
 105                         }
 106                 }
 107         }
 108 }
 109
 110 /*
 111  * Compare two wide-character strings
 112  */
 113 static int
 114 wide_str_coll(const wchar_t *s1, const wchar_t *s2)
 115 {
 116         int ret = 0;
 117
 118         errno = 0;
 119         ret = wcscoll(s1, s2);
 120         if (errno == EILSEQ) {
 121                 errno = 0;
 122                 ret = wcscmp(s1, s2);
 123                 if (errno != 0) {
 124                         for (size_t i = 0; ; ++i) {
 125                                 wchar_t c1 = s1[i];
 126                                 wchar_t c2 = s2[i];
 127                                 if (c1 == L'\0')
 128                                         return ((c2 == L'\0') ? 0 : -1);
 129                                 if (c2 == L'\0')
 130                                         return (+1);
 131                                 if (c1 == c2)
 132                                         continue;
 133                                 return ((int)(c1 - c2));
 134                         }
 135                 }
 136         }
 137         return (ret);
 138 }
 139
 140 /* counterparts of wcs functions */
 141
 142 void
 143 bwsprintf(FILE *f, struct bwstring *bws, const char *prefix, const char *suffix)
 144 {
 145
 146         if (MB_CUR_MAX == 1)
 147                 fprintf(f, "%s%s%s", prefix, bws->data.cstr, suffix);
 148         else
 149                 fprintf(f, "%s%S%s", prefix, bws->data.wstr, suffix);
 150 }
 151
 152 const void* bwsrawdata(const struct bwstring *bws)
 153 {
 154
 155         return (&(bws->data));
 156 }
 157
 158 size_t bwsrawlen(const struct bwstring *bws)
 159 {
 160
 161         return ((MB_CUR_MAX == 1) ? bws->len : SIZEOF_WCHAR_STRING(bws->len));
 162 }
 163
 164 size_t
 165 bws_memsize(const struct bwstring *bws)
 166 {
 167
 168         return ((MB_CUR_MAX == 1) ? (bws->len + 2 + sizeof(struct bwstring)) :
 169             (SIZEOF_WCHAR_STRING(bws->len + 1) + sizeof(struct bwstring)));
 170 }
 171
 172 void
 173 bws_setlen(struct bwstring *bws, size_t newlen)
 174 {
 175
 176         if (bws && newlen != bws->len && newlen <= bws->len) {
 177                 bws->len = newlen;
 178                 if (MB_CUR_MAX == 1)
 179                         bws->data.cstr[newlen] = '\0';
 180                 else
 181                         bws->data.wstr[newlen] = L'\0';
 182         }
 183 }
 184
 185 /*
 186  * Allocate a new binary string of specified size
 187  */
 188 struct bwstring *
 189 bwsalloc(size_t sz)
 190 {
 191         struct bwstring *ret;
 192
 193         if (MB_CUR_MAX == 1)
 194                 ret = sort_malloc(sizeof(struct bwstring) + 1 + sz);
 195         else
 196                 ret = sort_malloc(sizeof(struct bwstring) +
 197                     SIZEOF_WCHAR_STRING(sz + 1));
 198         ret->len = sz;
 199
 200         if (MB_CUR_MAX == 1)
 201                 ret->data.cstr[ret->len] = '\0';
 202         else
 203                 ret->data.wstr[ret->len] = L'\0';
 204
 205         return (ret);
 206 }
 207
 208 /*
 209  * Create a copy of binary string.
 210  * New string size equals the length of the old string.
 211  */
 212 struct bwstring *
 213 bwsdup(const struct bwstring *s)
 214 {
 215
 216         if (s == NULL)
 217                 return (NULL);
 218         else {
 219                 struct bwstring *ret = bwsalloc(s->len);
 220
 221                 if (MB_CUR_MAX == 1)
 222                         memcpy(ret->data.cstr, s->data.cstr, (s->len));
 223                 else
 224                         memcpy(ret->data.wstr, s->data.wstr,
 225                             SIZEOF_WCHAR_STRING(s->len));
 226
 227                 return (ret);
 228         }
 229 }
 230
 231 /*
 232  * Create a new binary string from a wide character buffer.
 233  */
 234 struct bwstring *
 235 bwssbdup(const wchar_t *str, size_t len)
 236 {
 237
 238         if (str == NULL)
 239                 return ((len == 0) ? bwsalloc(0) : NULL);
 240         else {
 241                 struct bwstring *ret;
 242
 243                 ret = bwsalloc(len);
 244
 245                 if (MB_CUR_MAX == 1)
 246                         for (size_t i = 0; i < len; ++i)
 247                                 ret->data.cstr[i] = (unsigned char) str[i];
 248                 else
 249                         memcpy(ret->data.wstr, str, SIZEOF_WCHAR_STRING(len));
 250
 251                 return (ret);
 252         }
 253 }
 254
 255 /*
 256  * Create a new binary string from a raw binary buffer.
 257  */
 258 struct bwstring *
 259 bwscsbdup(const unsigned char *str, size_t len)
 260 {
 261         struct bwstring *ret;
 262
 263         ret = bwsalloc(len);
 264
 265         if (str) {
 266                 if (MB_CUR_MAX == 1)
 267                         memcpy(ret->data.cstr, str, len);
 268                 else {
 269                         mbstate_t mbs;
 270                         const char *s;
 271                         size_t charlen, chars, cptr;
 272
 273                         chars = 0;
 274                         cptr = 0;
 275                         s = (const char *) str;
 276
 277                         memset(&mbs, 0, sizeof(mbs));
 278
 279                         while (cptr < len) {
 280                                 size_t n = MB_CUR_MAX;
 281
 282                                 if (n > len - cptr)
 283                                         n = len - cptr;
 284                                 charlen = mbrlen(s + cptr, n, &mbs);
 285                                 switch (charlen) {
 286                                 case 0:
 287                                         /* FALLTHROUGH */
 288                                 case (size_t) -1:
 289                                         /* FALLTHROUGH */
 290                                 case (size_t) -2:
 291                                         ret->data.wstr[chars++] =
 292                                             (unsigned char) s[cptr];
 293                                         ++cptr;
 294                                         break;
 295                                 default:
 296                                         n = mbrtowc(ret->data.wstr + (chars++),
 297                                             s + cptr, charlen, &mbs);
 298                                         if ((n == (size_t)-1) || (n == (size_t)-2))
 299                                                 /* NOTREACHED */
 300                                                 err(2, "mbrtowc error");
 301                                         cptr += charlen;
 302                                 }
 303                         }
 304
 305                         ret->len = chars;
 306                         ret->data.wstr[ret->len] = L'\0';
 307                 }
 308         }
 309         return (ret);
 310 }
 311
 312 /*
 313  * De-allocate object memory
 314  */
 315 void
 316 bwsfree(const struct bwstring *s)
 317 {
 318
 319         if (s)
 320                 sort_free(s);
 321 }
 322
 323 /*
 324  * Copy content of src binary string to dst.
 325  * If the capacity of the dst string is not sufficient,
 326  * then the data is truncated.
 327  */
 328 size_t
 329 bwscpy(struct bwstring *dst, const struct bwstring *src)
 330 {
 331         size_t nums = src->len;
 332
 333         if (nums > dst->len)
 334                 nums = dst->len;
 335         dst->len = nums;
 336
 337         if (MB_CUR_MAX == 1) {
 338                 memcpy(dst->data.cstr, src->data.cstr, nums);
 339                 dst->data.cstr[dst->len] = '\0';
 340         } else {
 341                 memcpy(dst->data.wstr, src->data.wstr,
 342                     SIZEOF_WCHAR_STRING(nums + 1));
 343                 dst->data.wstr[dst->len] = L'\0';
 344         }
 345
 346         return (nums);
 347 }
 348
 349 /*
 350  * Copy content of src binary string to dst,
 351  * with specified number of symbols to be copied.
 352  * If the capacity of the dst string is not sufficient,
 353  * then the data is truncated.
 354  */
 355 struct bwstring *
 356 bwsncpy(struct bwstring *dst, const struct bwstring *src, size_t size)
 357 {
 358         size_t nums = src->len;
 359
 360         if (nums > dst->len)
 361                 nums = dst->len;
 362         if (nums > size)
 363                 nums = size;
 364         dst->len = nums;
 365
 366         if (MB_CUR_MAX == 1) {
 367                 memcpy(dst->data.cstr, src->data.cstr, nums);
 368                 dst->data.cstr[dst->len] = '\0';
 369         } else {
 370                 memcpy(dst->data.wstr, src->data.wstr,
 371                     SIZEOF_WCHAR_STRING(nums + 1));
 372                 dst->data.wstr[dst->len] = L'\0';
 373         }
 374
 375         return (dst);
 376 }
 377
 378 /*
 379  * Copy content of src binary string to dst,
 380  * with specified number of symbols to be copied.
 381  * An offset value can be specified, from the start of src string.
 382  * If the capacity of the dst string is not sufficient,
 383  * then the data is truncated.
 384  */
 385 struct bwstring *
 386 bwsnocpy(struct bwstring *dst, const struct bwstring *src, size_t offset,
 387     size_t size)
 388 {
 389
 390         if (offset >= src->len) {
 391                 dst->data.wstr[0] = 0;
 392                 dst->len = 0;
 393         } else {
 394                 size_t nums = src->len - offset;
 395
 396                 if (nums > dst->len)
 397                         nums = dst->len;
 398                 if (nums > size)
 399                         nums = size;
 400                 dst->len = nums;
 401                 if (MB_CUR_MAX == 1) {
 402                         memcpy(dst->data.cstr, src->data.cstr + offset,
 403                             (nums));
 404                         dst->data.cstr[dst->len] = '\0';
 405                 } else {
 406                         memcpy(dst->data.wstr, src->data.wstr + offset,
 407                             SIZEOF_WCHAR_STRING(nums));
 408                         dst->data.wstr[dst->len] = L'\0';
 409                 }
 410         }
 411         return (dst);
 412 }
 413
 414 /*
 415  * Write binary string to the file.
 416  * The output is ended either with '\n' (nl == true)
 417  * or '\0' (nl == false).
 418  */
 419 size_t
 420 bwsfwrite(struct bwstring *bws, FILE *f, bool zero_ended)
 421 {
 422
 423         if (MB_CUR_MAX == 1) {
 424                 size_t len = bws->len;
 425
 426                 if (!zero_ended) {
 427                         bws->data.cstr[len] = '\n';
 428
 429                         if (fwrite(bws->data.cstr, len + 1, 1, f) < 1)
 430                                 err(2, NULL);
 431
 432                         bws->data.cstr[len] = '\0';
 433                 } else if (fwrite(bws->data.cstr, len + 1, 1, f) < 1)
 434                         err(2, NULL);
 435
 436                 return (len + 1);
 437
 438         } else {
 439                 wchar_t eols;
 440                 size_t printed = 0;
 441
 442                 eols = zero_ended ? btowc('\0') : btowc('\n');
 443
 444                 while (printed < BWSLEN(bws)) {
 445                         const wchar_t *s = bws->data.wstr + printed;
 446
 447                         if (*s == L'\0') {
 448                                 int nums;
 449
 450                                 nums = fwprintf(f, L"%lc", *s);
 451
 452                                 if (nums != 1)
 453                                         err(2, NULL);
 454                                 ++printed;
 455                         } else {
 456                                 int nums;
 457
 458                                 nums = fwprintf(f, L"%ls", s);
 459
 460                                 if (nums < 1)
 461                                         err(2, NULL);
 462                                 printed += nums;
 463                         }
 464                 }
 465                 fwprintf(f, L"%lc", eols);
 466                 return (printed + 1);
 467         }
 468 }
 469
 470 /*
 471  * Allocate and read a binary string from file.
 472  * The strings are nl-ended or zero-ended, depending on the sort setting.
 473  */
 474 struct bwstring *
 475 bwsfgetln(FILE *f, size_t *len, bool zero_ended, struct reader_buffer *rb)
 476 {
 477         wint_t eols;
 478
 479         eols = zero_ended ? btowc('\0') : btowc('\n');
 480
 481         if (!zero_ended && (MB_CUR_MAX > 1)) {
 482                 wchar_t *ret;
 483
 484                 ret = fgetwln(f, len);
 485
 486                 if (ret == NULL) {
 487                         if (!feof(f))
 488                                 err(2, NULL);
 489                         return (NULL);
 490                 }
 491                 if (*len > 0) {
 492                         if (ret[*len - 1] == (wchar_t)eols)
 493                                 --(*len);
 494                 }
 495                 return (bwssbdup(ret, *len));
 496
 497         } else if (!zero_ended && (MB_CUR_MAX == 1)) {
 498                 char *ret;
 499
 500                 ret = fgetln(f, len);
 501
 502                 if (ret == NULL) {
 503                         if (!feof(f))
 504                                 err(2, NULL);
 505                         return (NULL);
 506                 }
 507                 if (*len > 0) {
 508                         if (ret[*len - 1] == '\n')
 509                                 --(*len);
 510                 }
 511                 return (bwscsbdup((unsigned char*)ret, *len));
 512
 513         } else {
 514                 *len = 0;
 515
 516                 if (feof(f))
 517                         return (NULL);
 518
 519                 if (2 >= rb->fgetwln_z_buffer_size) {
 520                         rb->fgetwln_z_buffer_size += 256;
 521                         rb->fgetwln_z_buffer = sort_realloc(rb->fgetwln_z_buffer,
 522                             sizeof(wchar_t) * rb->fgetwln_z_buffer_size);
 523                 }
 524                 rb->fgetwln_z_buffer[*len] = 0;
 525
 526                 if (MB_CUR_MAX == 1)
 527                         while (!feof(f)) {
 528                                 int c;
 529
 530                                 c = fgetc(f);
 531
 532                                 if (c == EOF) {
 533                                         if (*len == 0)
 534                                                 return (NULL);
 535                                         goto line_read_done;
 536                                 }
 537                                 if (c == eols)
 538                                         goto line_read_done;
 539
 540                                 if (*len + 1 >= rb->fgetwln_z_buffer_size) {
 541                                         rb->fgetwln_z_buffer_size += 256;
 542                                         rb->fgetwln_z_buffer = sort_realloc(rb->fgetwln_z_buffer,
 543                                             SIZEOF_WCHAR_STRING(rb->fgetwln_z_buffer_size));
 544                                 }
 545
 546                                 rb->fgetwln_z_buffer[*len] = c;
 547                                 rb->fgetwln_z_buffer[++(*len)] = 0;
 548                         }
 549                 else
 550                         while (!feof(f)) {
 551                                 wint_t c = 0;
 552
 553                                 c = fgetwc(f);
 554
 555                                 if (c == WEOF) {
 556                                         if (*len == 0)
 557                                                 return (NULL);
 558                                         goto line_read_done;
 559                                 }
 560                                 if (c == eols)
 561                                         goto line_read_done;
 562
 563                                 if (*len + 1 >= rb->fgetwln_z_buffer_size) {
 564                                         rb->fgetwln_z_buffer_size += 256;
 565                                         rb->fgetwln_z_buffer = sort_realloc(rb->fgetwln_z_buffer,
 566                                             SIZEOF_WCHAR_STRING(rb->fgetwln_z_buffer_size));
 567                                 }
 568
 569                                 rb->fgetwln_z_buffer[*len] = c;
 570                                 rb->fgetwln_z_buffer[++(*len)] = 0;
 571                         }
 572
 573 line_read_done:
 574                 /* we do not count the last 0 */
 575                 return (bwssbdup(rb->fgetwln_z_buffer, *len));
 576         }
 577 }
 578
 579 int
 580 bwsncmp(const struct bwstring *bws1, const struct bwstring *bws2,
 581     size_t offset, size_t len)
 582 {
 583         size_t cmp_len, len1, len2;
 584         int res = 0;
 585
 586         len1 = bws1->len;
 587         len2 = bws2->len;
 588
 589         if (len1 <= offset) {
 590                 return ((len2 <= offset) ? 0 : -1);
 591         } else {
 592                 if (len2 <= offset)
 593                         return (+1);
 594                 else {
 595                         len1 -= offset;
 596                         len2 -= offset;
 597
 598                         cmp_len = len1;
 599
 600                         if (len2 < cmp_len)
 601                                 cmp_len = len2;
 602
 603                         if (len < cmp_len)
 604                                 cmp_len = len;
 605
 606                         if (MB_CUR_MAX == 1) {
 607                                 const unsigned char *s1, *s2;
 608
 609                                 s1 = bws1->data.cstr + offset;
 610                                 s2 = bws2->data.cstr + offset;
 611
 612                                 res = memcmp(s1, s2, cmp_len);
 613
 614                         } else {
 615                                 const wchar_t *s1, *s2;
 616
 617                                 s1 = bws1->data.wstr + offset;
 618                                 s2 = bws2->data.wstr + offset;
 619
 620                                 res = memcmp(s1, s2, SIZEOF_WCHAR_STRING(cmp_len));
 621                         }
 622                 }
 623         }
 624
 625         if (res == 0) {
 626                 if (len1 < cmp_len && len1 < len2)
 627                         res = -1;
 628                 else if (len2 < cmp_len && len2 < len1)
 629                         res = +1;
 630         }
 631
 632         return (res);
 633 }
 634
 635 int
 636 bwscmp(const struct bwstring *bws1, const struct bwstring *bws2, size_t offset)
 637 {
 638         size_t len1, len2, cmp_len;
 639         int res;
 640
 641         len1 = bws1->len;
 642         len2 = bws2->len;
 643
 644         len1 -= offset;
 645         len2 -= offset;
 646
 647         cmp_len = len1;
 648
 649         if (len2 < cmp_len)
 650                 cmp_len = len2;
 651
 652         res = bwsncmp(bws1, bws2, offset, cmp_len);
 653
 654         if (res == 0) {
 655                 if( len1 < len2)
 656                         res = -1;
 657                 else if (len2 < len1)
 658                         res = +1;
 659         }
 660
 661         return (res);
 662 }
 663
 664 int
 665 bws_iterator_cmp(bwstring_iterator iter1, bwstring_iterator iter2, size_t len)
 666 {
 667         wchar_t c1, c2;
 668         size_t i = 0;
 669
 670         for (i = 0; i < len; ++i) {
 671                 c1 = bws_get_iter_value(iter1);
 672                 c2 = bws_get_iter_value(iter2);
 673                 if (c1 != c2)
 674                         return (c1 - c2);
 675                 iter1 = bws_iterator_inc(iter1, 1);
 676                 iter2 = bws_iterator_inc(iter2, 1);
 677         }
 678
 679         return (0);
 680 }
 681
 682 int
 683 bwscoll(const struct bwstring *bws1, const struct bwstring *bws2, size_t offset)
 684 {
 685         size_t len1, len2;
 686
 687         len1 = bws1->len;
 688         len2 = bws2->len;
 689
 690         if (len1 <= offset)
 691                 return ((len2 <= offset) ? 0 : -1);
 692         else {
 693                 if (len2 <= offset)
 694                         return (+1);
 695                 else {
 696                         len1 -= offset;
 697                         len2 -= offset;
 698
 699                         if (MB_CUR_MAX == 1) {
 700                                 const unsigned char *s1, *s2;
 701
 702                                 s1 = bws1->data.cstr + offset;
 703                                 s2 = bws2->data.cstr + offset;
 704
 705                                 if (byte_sort) {
 706                                         int res = 0;
 707
 708                                         if (len1 > len2) {
 709                                                 res = memcmp(s1, s2, len2);
 710                                                 if (!res)
 711                                                         res = +1;
 712                                         } else if (len1 < len2) {
 713                                                 res = memcmp(s1, s2, len1);
 714                                                 if (!res)
 715                                                         res = -1;
 716                                         } else
 717                                                 res = memcmp(s1, s2, len1);
 718
 719                                         return (res);
 720
 721                                 } else {
 722                                         int res = 0;
 723                                         size_t i, maxlen;
 724
 725                                         i = 0;
 726                                         maxlen = len1;
 727
 728                                         if (maxlen > len2)
 729                                                 maxlen = len2;
 730
 731                                         while (i < maxlen) {
 732                                                 /* goto next non-zero part: */
 733                                                 while ((i < maxlen) &&
 734                                                     !s1[i] && !s2[i])
 735                                                         ++i;
 736
 737                                                 if (i >= maxlen)
 738                                                         break;
 739
 740                                                 if (s1[i] == 0) {
 741                                                         if (s2[i] == 0)
 742                                                                 /* NOTREACHED */
 743                                                                 err(2, "bwscoll error 01");
 744                                                         else
 745                                                                 return (-1);
 746                                                 } else if (s2[i] == 0)
 747                                                         return (+1);
 748
 749                                                 res = strcoll((const char*)(s1 + i), (const char*)(s2 + i));
 750                                                 if (res)
 751                                                         return (res);
 752
 753                                                 while ((i < maxlen) &&
 754                                                     s1[i] && s2[i])
 755                                                         ++i;
 756
 757                                                 if (i >= maxlen)
 758                                                         break;
 759
 760                                                 if (s1[i] == 0) {
 761                                                         if (s2[i] == 0) {
 762                                                                 ++i;
 763                                                                 continue;
 764                                                         } else
 765                                                                 return (-1);
 766                                                 } else if (s2[i] == 0)
 767                                                         return (+1);
 768                                                 else
 769                                                         /* NOTREACHED */
 770                                                         err(2, "bwscoll error 02");
 771                                         }
 772
 773                                         if (len1 < len2)
 774                                                 return (-1);
 775                                         else if (len1 > len2)
 776                                                 return (+1);
 777
 778                                         return (0);
 779                                 }
 780                         } else {
 781                                 const wchar_t *s1, *s2;
 782                                 size_t i, maxlen;
 783                                 int res = 0;
 784
 785                                 s1 = bws1->data.wstr + offset;
 786                                 s2 = bws2->data.wstr + offset;
 787
 788                                 i = 0;
 789                                 maxlen = len1;
 790
 791                                 if (maxlen > len2)
 792                                         maxlen = len2;
 793
 794                                 while (i < maxlen) {
 795
 796                                         /* goto next non-zero part: */
 797                                         while ((i < maxlen) &&
 798                                             !s1[i] && !s2[i])
 799                                                 ++i;
 800
 801                                         if (i >= maxlen)
 802                                                 break;
 803
 804                                         if (s1[i] == 0) {
 805                                                 if (s2[i] == 0)
 806                                                         /* NOTREACHED */
 807                                                         err(2, "bwscoll error 1");
 808                                                 else
 809                                                         return (-1);
 810                                         } else if (s2[i] == 0)
 811                                                 return (+1);
 812
 813                                         res = wide_str_coll(s1 + i, s2 + i);
 814                                         if (res)
 815                                                 return (res);
 816
 817                                         while ((i < maxlen) && s1[i] && s2[i])
 818                                                 ++i;
 819
 820                                         if (i >= maxlen)
 821                                                 break;
 822
 823                                         if (s1[i] == 0) {
 824                                                 if (s2[i] == 0) {
 825                                                         ++i;
 826                                                         continue;
 827                                                 } else
 828                                                         return (-1);
 829                                         } else if (s2[i] == 0)
 830                                                 return (+1);
 831                                         else
 832                                                 /* NOTREACHED */
 833                                                 err(2, "bwscoll error 2");
 834                                 }
 835
 836                                 if (len1 < len2)
 837                                         return (-1);
 838                                 else if (len1 > len2)
 839                                         return (+1);
 840
 841                                 return (0);
 842                         }
 843                 }
 844         }
 845 }
 846
 847 /*
 848  * Correction of the system API
 849  */
 850 double
 851 bwstod(struct bwstring *s0, bool *empty)
 852 {
 853         double ret = 0;
 854
 855         if (MB_CUR_MAX == 1) {
 856                 unsigned char *end, *s;
 857                 char *ep;
 858
 859                 s = s0->data.cstr;
 860                 end = s + s0->len;
 861                 ep = NULL;
 862
 863                 while (isblank(*s) && s < end)
 864                         ++s;
 865
 866                 if (!isprint(*s)) {
 867                         *empty = true;
 868                         return (0);
 869                 }
 870
 871                 ret = strtod((char*)s, &ep);
 872                 if ((unsigned char*) ep == s) {
 873                         *empty = true;
 874                         return (0);
 875                 }
 876         } else {
 877                 wchar_t *end, *ep, *s;
 878
 879                 s = s0->data.wstr;
 880                 end = s + s0->len;
 881                 ep = NULL;
 882
 883                 while (iswblank(*s) && s < end)
 884                         ++s;
 885
 886                 if (!iswprint(*s)) {
 887                         *empty = true;
 888                         return (0);
 889                 }
 890
 891                 ret = wcstod(s, &ep);
 892                 if (ep == s) {
 893                         *empty = true;
 894                         return (0);
 895                 }
 896         }
 897
 898         *empty = false;
 899         return (ret);
 900 }
 901
 902 /*
 903  * A helper function for monthcoll.  If a line matches
 904  * a month name, it returns (number of the month - 1),
 905  * while if there is no match, it just return -1.
 906  */
 907
 908 int
 909 bws_month_score(const struct bwstring *s0)
 910 {
 911
 912         if (MB_CUR_MAX == 1) {
 913                 const unsigned char *end, *s;
 914
 915                 s = s0->data.cstr;
 916                 end = s + s0->len;
 917
 918                 while (isblank(*s) && s < end)
 919                         ++s;
 920
 921                 for (int i = 11; i >= 0; --i) {
 922                         if (cmonths[i] &&
 923                             (s == (unsigned char*)strstr((const char*)s, (char*)(cmonths[i]))))
 924                                 return (i);
 925                 }
 926
 927         } else {
 928                 const wchar_t *end, *s;
 929
 930                 s = s0->data.wstr;
 931                 end = s + s0->len;
 932
 933                 while (iswblank(*s) && s < end)
 934                         ++s;
 935
 936                 for (int i = 11; i >= 0; --i) {
 937                         if (wmonths[i] && (s == wcsstr(s, wmonths[i])))
 938                                 return (i);
 939                 }
 940         }
 941
 942         return (-1);
 943 }
 944
 945 /*
 946  * Rips out leading blanks (-b).
 947  */
 948 struct bwstring *
 949 ignore_leading_blanks(struct bwstring *str)
 950 {
 951
 952         if (MB_CUR_MAX == 1) {
 953                 unsigned char *dst, *end, *src;
 954
 955                 src = str->data.cstr;
 956                 dst = src;
 957                 end = src + str->len;
 958
 959                 while (src < end && isblank(*src))
 960                         ++src;
 961
 962                 if (src != dst) {
 963                         size_t newlen;
 964
 965                         newlen = BWSLEN(str) - (src - dst);
 966
 967                         while (src < end) {
 968                                 *dst = *src;
 969                                 ++dst;
 970                                 ++src;
 971                         }
 972                         bws_setlen(str, newlen);
 973                 }
 974         } else {
 975                 wchar_t *dst, *end, *src;
 976
 977                 src = str->data.wstr;
 978                 dst = src;
 979                 end = src + str->len;
 980
 981                 while (src < end && iswblank(*src))
 982                         ++src;
 983
 984                 if (src != dst) {
 985
 986                         size_t newlen = BWSLEN(str) - (src - dst);
 987
 988                         while (src < end) {
 989                                 *dst = *src;
 990                                 ++dst;
 991                                 ++src;
 992                         }
 993                         bws_setlen(str, newlen);
 994
 995                 }
 996         }
 997         return (str);
 998 }
 999
1000 /*
1001  * Rips out nonprinting characters (-i).
1002  */
1003 struct bwstring *
1004 ignore_nonprinting(struct bwstring *str)
1005 {
1006         size_t newlen = str->len;
1007
1008         if (MB_CUR_MAX == 1) {
1009                 unsigned char *dst, *end, *src;
1010                 unsigned char c;
1011
1012                 src = str->data.cstr;
1013                 dst = src;
1014                 end = src + str->len;
1015
1016                 while (src < end) {
1017                         c = *src;
1018                         if (isprint(c)) {
1019                                 *dst = c;
1020                                 ++dst;
1021                                 ++src;
1022                         } else {
1023                                 ++src;
1024                                 --newlen;
1025                         }
1026                 }
1027         } else {
1028                 wchar_t *dst, *end, *src;
1029                 wchar_t c;
1030
1031                 src = str->data.wstr;
1032                 dst = src;
1033                 end = src + str->len;
1034
1035                 while (src < end) {
1036                         c = *src;
1037                         if (iswprint(c)) {
1038                                 *dst = c;
1039                                 ++dst;
1040                                 ++src;
1041                         } else {
1042                                 ++src;
1043                                 --newlen;
1044                         }
1045                 }
1046         }
1047         bws_setlen(str, newlen);
1048
1049         return (str);
1050 }
1051
1052 /*
1053  * Rips out any characters that are not alphanumeric characters
1054  * nor blanks (-d).
1055  */
1056 struct bwstring *
1057 dictionary_order(struct bwstring *str)
1058 {
1059         size_t newlen = str->len;
1060
1061         if (MB_CUR_MAX == 1) {
1062                 unsigned char *dst, *end, *src;
1063                 unsigned char c;
1064
1065                 src = str->data.cstr;
1066                 dst = src;
1067                 end = src + str->len;
1068
1069                 while (src < end) {
1070                         c = *src;
1071                         if (isalnum(c) || isblank(c)) {
1072                                 *dst = c;
1073                                 ++dst;
1074                                 ++src;
1075                         } else {
1076                                 ++src;
1077                                 --newlen;
1078                         }
1079                 }
1080         } else {
1081                 wchar_t *dst, *end, *src;
1082                 wchar_t c;
1083
1084                 src = str->data.wstr;
1085                 dst = src;
1086                 end = src + str->len;
1087
1088                 while (src < end) {
1089                         c = *src;
1090                         if (iswalnum(c) || iswblank(c)) {
1091                                 *dst = c;
1092                                 ++dst;
1093                                 ++src;
1094                         } else {
1095                                 ++src;
1096                                 --newlen;
1097                         }
1098                 }
1099         }
1100         bws_setlen(str, newlen);
1101
1102         return (str);
1103 }
1104
1105 /*
1106  * Converts string to lower case(-f).
1107  */
1108 struct bwstring *
1109 ignore_case(struct bwstring *str)
1110 {
1111
1112         if (MB_CUR_MAX == 1) {
1113                 unsigned char *end, *s;
1114
1115                 s = str->data.cstr;
1116                 end = s + str->len;
1117
1118                 while (s < end) {
1119                         *s = toupper(*s);
1120                         ++s;
1121                 }
1122         } else {
1123                 wchar_t *end, *s;
1124
1125                 s = str->data.wstr;
1126                 end = s + str->len;
1127
1128                 while (s < end) {
1129                         *s = towupper(*s);
1130                         ++s;
1131                 }
1132         }
1133         return (str);
1134 }
1135
1136 void
1137 bws_disorder_warnx(struct bwstring *s, const char *fn, size_t pos)
1138 {
1139
1140         if (MB_CUR_MAX == 1)
1141                 warnx("%s:%zu: disorder: %s", fn, pos + 1, s->data.cstr);
1142         else
1143                 warnx("%s:%zu: disorder: %ls", fn, pos + 1, s->data.wstr);
1144 }