1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Copyright (c) 2011 The FreeBSD Foundation 8 * 9 * Portions of this software were developed by David Chisnall 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/types.h> 39 #include <ctype.h> 40 #include <errno.h> 41 #include <limits.h> 42 #include <locale.h> 43 #include <monetary.h> 44 #include <stdarg.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 49 #include "xlocale_private.h" 50 51 /* internal flags */ 52 #define NEED_GROUPING 0x01 /* print digits grouped (default) */ 53 #define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */ 54 #define LOCALE_POSN 0x04 /* use locale defined +/- (default) */ 55 #define PARENTH_POSN 0x08 /* enclose negative amount in () */ 56 #define SUPPRESS_CURR_SYMBOL 0x10 /* suppress the currency from output */ 57 #define LEFT_JUSTIFY 0x20 /* left justify */ 58 #define USE_INTL_CURRENCY 0x40 /* use international currency symbol */ 59 #define IS_NEGATIVE 0x80 /* is argument value negative ? */ 60 61 /* internal macros */ 62 #define PRINT(CH) do { \ 63 if (dst >= s + maxsize) \ 64 goto e2big_error; \ 65 *dst++ = CH; \ 66 } while (0) 67 68 #define PRINTS(STR) do { \ 69 char *tmps = STR; \ 70 while (*tmps != '\0') \ 71 PRINT(*tmps++); \ 72 } while (0) 73 74 #define GET_NUMBER(VAR) do { \ 75 VAR = 0; \ 76 while (isdigit((unsigned char)*fmt)) { \ 77 if (VAR > INT_MAX / 10) \ 78 goto e2big_error; \ 79 VAR *= 10; \ 80 VAR += *fmt - '0'; \ 81 if (VAR < 0) \ 82 goto e2big_error; \ 83 fmt++; \ 84 } \ 85 } while (0) 86 87 #define GRPCPY(howmany) do { \ 88 int i = howmany; \ 89 while (i-- > 0) { \ 90 avalue_size--; \ 91 *--bufend = *(avalue + avalue_size + padded); \ 92 } \ 93 } while (0) 94 95 #define GRPSEP do { \ 96 bufend -= thousands_sep_size; \ 97 memcpy(bufend, thousands_sep, thousands_sep_size); \ 98 groups++; \ 99 } while (0) 100 101 static void __setup_vars(int, char *, char *, char *, char **); 102 static int __calc_left_pad(int, char *); 103 static char *__format_grouped_double(double, int *, int, int, int); 104 105 static ssize_t 106 vstrfmon_l(char * __restrict s, size_t maxsize, locale_t loc, 107 const char * __restrict format, va_list ap) 108 { 109 char *dst; /* output destination pointer */ 110 const char *fmt; /* current format poistion pointer */ 111 struct lconv *lc; /* pointer to lconv structure */ 112 char *asciivalue; /* formatted double pointer */ 113 114 int flags; /* formatting options */ 115 int pad_char; /* padding character */ 116 int pad_size; /* pad size */ 117 int width; /* field width */ 118 int left_prec; /* left precision */ 119 int right_prec; /* right precision */ 120 double value; /* just value */ 121 char space_char = ' '; /* space after currency */ 122 123 char cs_precedes, /* values gathered from struct lconv */ 124 sep_by_space, 125 sign_posn, 126 *signstr, 127 *currency_symbol; 128 129 char *tmpptr; /* temporary vars */ 130 int sverrno; 131 FIX_LOCALE(loc); 132 133 lc = localeconv_l(loc); 134 dst = s; 135 fmt = format; 136 asciivalue = NULL; 137 currency_symbol = NULL; 138 139 while (*fmt) { 140 /* pass nonformating characters AS IS */ 141 if (*fmt != '%') 142 goto literal; 143 144 /* '%' found ! */ 145 146 /* "%%" mean just '%' */ 147 if (*(fmt + 1) == '%') { 148 fmt++; 149 literal: 150 PRINT(*fmt++); 151 continue; 152 } 153 154 /* set up initial values */ 155 flags = (NEED_GROUPING|LOCALE_POSN); 156 pad_char = ' '; /* padding character is "space" */ 157 pad_size = 0; /* no padding initially */ 158 left_prec = -1; /* no left precision specified */ 159 right_prec = -1; /* no right precision specified */ 160 width = -1; /* no width specified */ 161 value = 0; /* we have no value to print now */ 162 163 /* Flags */ 164 while (1) { 165 switch (*++fmt) { 166 case '=': /* fill character */ 167 pad_char = *++fmt; 168 if (pad_char == '\0') 169 goto format_error; 170 continue; 171 case '^': /* not group currency */ 172 flags &= ~(NEED_GROUPING); 173 continue; 174 case '+': /* use locale defined signs */ 175 if (flags & SIGN_POSN_USED) 176 goto format_error; 177 flags |= (SIGN_POSN_USED|LOCALE_POSN); 178 continue; 179 case '(': /* enclose negatives with () */ 180 if (flags & SIGN_POSN_USED) 181 goto format_error; 182 flags |= (SIGN_POSN_USED|PARENTH_POSN); 183 continue; 184 case '!': /* suppress currency symbol */ 185 flags |= SUPPRESS_CURR_SYMBOL; 186 continue; 187 case '-': /* alignment (left) */ 188 flags |= LEFT_JUSTIFY; 189 continue; 190 default: 191 break; 192 } 193 break; 194 } 195 196 /* field Width */ 197 if (isdigit((unsigned char)*fmt)) { 198 GET_NUMBER(width); 199 /* Do we have enough space to put number with 200 * required width ? 201 */ 202 if ((unsigned int)width >= maxsize - (dst - s)) 203 goto e2big_error; 204 } 205 206 /* Left precision */ 207 if (*fmt == '#') { 208 if (!isdigit((unsigned char)*++fmt)) 209 goto format_error; 210 GET_NUMBER(left_prec); 211 if ((unsigned int)left_prec >= maxsize - (dst - s)) 212 goto e2big_error; 213 } 214 215 /* Right precision */ 216 if (*fmt == '.') { 217 if (!isdigit((unsigned char)*++fmt)) 218 goto format_error; 219 GET_NUMBER(right_prec); 220 if ((unsigned int)right_prec >= maxsize - (dst - s) - 221 left_prec) 222 goto e2big_error; 223 } 224 225 /* Conversion Characters */ 226 switch (*fmt++) { 227 case 'i': /* use international currency format */ 228 flags |= USE_INTL_CURRENCY; 229 break; 230 case 'n': /* use national currency format */ 231 flags &= ~(USE_INTL_CURRENCY); 232 break; 233 default: /* required character is missing or 234 premature EOS */ 235 goto format_error; 236 } 237 238 if (currency_symbol != NULL) 239 free(currency_symbol); 240 if (flags & USE_INTL_CURRENCY) { 241 currency_symbol = strdup(lc->int_curr_symbol); 242 if (currency_symbol != NULL && 243 strlen(currency_symbol) > 3) { 244 space_char = currency_symbol[3]; 245 currency_symbol[3] = '\0'; 246 } 247 } else 248 currency_symbol = strdup(lc->currency_symbol); 249 250 if (currency_symbol == NULL) 251 goto end_error; /* ENOMEM. */ 252 253 /* value itself */ 254 value = va_arg(ap, double); 255 256 /* detect sign */ 257 if (value < 0) { 258 flags |= IS_NEGATIVE; 259 value = -value; 260 } 261 262 /* fill left_prec with amount of padding chars */ 263 if (left_prec >= 0) { 264 pad_size = __calc_left_pad((flags ^ IS_NEGATIVE), 265 currency_symbol) - 266 __calc_left_pad(flags, currency_symbol); 267 if (pad_size < 0) 268 pad_size = 0; 269 } 270 271 if (asciivalue != NULL) 272 free(asciivalue); 273 asciivalue = __format_grouped_double(value, &flags, 274 left_prec, right_prec, pad_char); 275 if (asciivalue == NULL) 276 goto end_error; /* errno already set */ 277 /* to ENOMEM by malloc() */ 278 279 /* set some variables for later use */ 280 __setup_vars(flags, &cs_precedes, &sep_by_space, 281 &sign_posn, &signstr); 282 283 /* 284 * Description of some LC_MONETARY's values: 285 * 286 * p_cs_precedes & n_cs_precedes 287 * 288 * = 1 - $currency_symbol precedes the value 289 * for a monetary quantity with a non-negative value 290 * = 0 - symbol succeeds the value 291 * 292 * p_sep_by_space & n_sep_by_space 293 * 294 * = 0 - no space separates $currency_symbol 295 * from the value for a monetary quantity with a 296 * non-negative value 297 * = 1 - space separates the symbol from the value 298 * = 2 - space separates the symbol and the sign string, 299 * if adjacent; otherwise, a space separates 300 * the sign string from the value 301 * 302 * p_sign_posn & n_sign_posn 303 * 304 * = 0 - parentheses enclose the quantity and the 305 * $currency_symbol 306 * = 1 - the sign string precedes the quantity and the 307 * $currency_symbol 308 * = 2 - the sign string succeeds the quantity and the 309 * $currency_symbol 310 * = 3 - the sign string precedes the $currency_symbol 311 * = 4 - the sign string succeeds the $currency_symbol 312 * 313 */ 314 315 tmpptr = dst; 316 317 while (pad_size-- > 0) 318 PRINT(' '); 319 320 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 321 PRINT('('); 322 323 if (cs_precedes == 1) { 324 if (sign_posn == 1 || sign_posn == 3) { 325 PRINTS(signstr); 326 if (sep_by_space == 2) /* XXX: ? */ 327 PRINT(' '); 328 } 329 330 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 331 PRINTS(currency_symbol); 332 333 if (sign_posn == 4) { 334 if (sep_by_space == 2) 335 PRINT(space_char); 336 PRINTS(signstr); 337 if (sep_by_space == 1) 338 PRINT(' '); 339 } else if (sep_by_space == 1) 340 PRINT(space_char); 341 } 342 } else if (sign_posn == 1) { 343 PRINTS(signstr); 344 if (sep_by_space == 2) 345 PRINT(' '); 346 } 347 348 PRINTS(asciivalue); 349 350 if (cs_precedes == 0) { 351 if (sign_posn == 3) { 352 if (sep_by_space == 1) 353 PRINT(' '); 354 PRINTS(signstr); 355 } 356 357 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 358 if ((sign_posn == 3 && sep_by_space == 2) 359 || (sep_by_space == 1 360 && (sign_posn == 0 361 || sign_posn == 1 362 || sign_posn == 2 363 || sign_posn == 4))) 364 PRINT(space_char); 365 PRINTS(currency_symbol); /* XXX: len */ 366 if (sign_posn == 4) { 367 if (sep_by_space == 2) 368 PRINT(' '); 369 PRINTS(signstr); 370 } 371 } 372 } 373 374 if (sign_posn == 2) { 375 if (sep_by_space == 2) 376 PRINT(' '); 377 PRINTS(signstr); 378 } 379 380 if (sign_posn == 0) { 381 if (flags & IS_NEGATIVE) 382 PRINT(')'); 383 else if (left_prec >= 0) 384 PRINT(' '); 385 } 386 387 if (dst - tmpptr < width) { 388 if (flags & LEFT_JUSTIFY) { 389 while (dst - tmpptr < width) 390 PRINT(' '); 391 } else { 392 pad_size = dst - tmpptr; 393 memmove(tmpptr + width - pad_size, tmpptr, 394 pad_size); 395 memset(tmpptr, ' ', width - pad_size); 396 dst += width - pad_size; 397 } 398 } 399 } 400 401 PRINT('\0'); 402 free(asciivalue); 403 free(currency_symbol); 404 return (dst - s - 1); /* return size of put data except trailing '\0' */ 405 406 e2big_error: 407 errno = E2BIG; 408 goto end_error; 409 410 format_error: 411 errno = EINVAL; 412 413 end_error: 414 sverrno = errno; 415 if (asciivalue != NULL) 416 free(asciivalue); 417 if (currency_symbol != NULL) 418 free(currency_symbol); 419 errno = sverrno; 420 return (-1); 421 } 422 423 static void 424 __setup_vars(int flags, char *cs_precedes, char *sep_by_space, 425 char *sign_posn, char **signstr) 426 { 427 struct lconv *lc = localeconv(); 428 429 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) { 430 *cs_precedes = lc->int_n_cs_precedes; 431 *sep_by_space = lc->int_n_sep_by_space; 432 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn; 433 *signstr = (lc->negative_sign[0] == '\0') ? "-" 434 : lc->negative_sign; 435 } else if (flags & USE_INTL_CURRENCY) { 436 *cs_precedes = lc->int_p_cs_precedes; 437 *sep_by_space = lc->int_p_sep_by_space; 438 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn; 439 *signstr = lc->positive_sign; 440 } else if (flags & IS_NEGATIVE) { 441 *cs_precedes = lc->n_cs_precedes; 442 *sep_by_space = lc->n_sep_by_space; 443 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn; 444 *signstr = (lc->negative_sign[0] == '\0') ? "-" 445 : lc->negative_sign; 446 } else { 447 *cs_precedes = lc->p_cs_precedes; 448 *sep_by_space = lc->p_sep_by_space; 449 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn; 450 *signstr = lc->positive_sign; 451 } 452 453 /* Set default values for unspecified information. */ 454 if (*cs_precedes != 0) 455 *cs_precedes = 1; 456 if (*sep_by_space == CHAR_MAX) 457 *sep_by_space = 0; 458 if (*sign_posn == CHAR_MAX) 459 *sign_posn = 0; 460 } 461 462 static int 463 __calc_left_pad(int flags, char *cur_symb) 464 { 465 char cs_precedes, sep_by_space, sign_posn, *signstr; 466 int left_chars = 0; 467 468 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr); 469 470 if (cs_precedes != 0) { 471 left_chars += strlen(cur_symb); 472 if (sep_by_space != 0) 473 left_chars++; 474 } 475 476 switch (sign_posn) { 477 case 0: 478 if (flags & IS_NEGATIVE) 479 left_chars++; 480 break; 481 case 1: 482 left_chars += strlen(signstr); 483 break; 484 case 3: 485 case 4: 486 if (cs_precedes != 0) 487 left_chars += strlen(signstr); 488 } 489 return (left_chars); 490 } 491 492 static int 493 get_groups(int size, char *grouping) 494 { 495 int chars = 0; 496 497 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */ 498 return (0); 499 500 while (size > (int)*grouping) { 501 chars++; 502 size -= (int)*grouping++; 503 /* no more grouping ? */ 504 if (*grouping == CHAR_MAX) 505 break; 506 /* rest grouping with same value ? */ 507 if (*grouping == 0) { 508 chars += (size - 1) / *(grouping - 1); 509 break; 510 } 511 } 512 return (chars); 513 } 514 515 /* convert double to locale-encoded string */ 516 static char * 517 __format_grouped_double(double value, int *flags, 518 int left_prec, int right_prec, int pad_char) 519 { 520 521 char *rslt; 522 char *avalue; 523 int avalue_size; 524 525 size_t bufsize; 526 char *bufend; 527 528 int padded; 529 530 struct lconv *lc = localeconv(); 531 char *grouping; 532 const char *decimal_point; 533 const char *thousands_sep; 534 size_t decimal_point_size; 535 size_t thousands_sep_size; 536 537 int groups = 0; 538 539 grouping = lc->mon_grouping; 540 decimal_point = lc->mon_decimal_point; 541 if (*decimal_point == '\0') 542 decimal_point = lc->decimal_point; 543 thousands_sep = lc->mon_thousands_sep; 544 if (*thousands_sep == '\0') 545 thousands_sep = lc->thousands_sep; 546 547 decimal_point_size = strlen(decimal_point); 548 thousands_sep_size = strlen(thousands_sep); 549 550 /* fill left_prec with default value */ 551 if (left_prec == -1) 552 left_prec = 0; 553 554 /* fill right_prec with default value */ 555 if (right_prec == -1) { 556 if (*flags & USE_INTL_CURRENCY) 557 right_prec = lc->int_frac_digits; 558 else 559 right_prec = lc->frac_digits; 560 561 if (right_prec == CHAR_MAX) /* POSIX locale ? */ 562 right_prec = 2; 563 } 564 565 if (*flags & NEED_GROUPING) 566 left_prec += get_groups(left_prec, grouping); 567 568 /* convert to string */ 569 avalue_size = asprintf(&avalue, "%*.*f", left_prec + right_prec + 1, 570 right_prec, value); 571 if (avalue_size < 0) 572 return (NULL); 573 574 /* make sure that we've enough space for result string */ 575 bufsize = avalue_size * (1 + thousands_sep_size) + decimal_point_size + 576 1; 577 rslt = calloc(1, bufsize); 578 if (rslt == NULL) { 579 free(avalue); 580 return (NULL); 581 } 582 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 583 584 /* skip spaces at beginning */ 585 padded = 0; 586 while (avalue[padded] == ' ') { 587 padded++; 588 avalue_size--; 589 } 590 591 if (right_prec > 0) { 592 bufend -= right_prec; 593 memcpy(bufend, avalue + avalue_size + padded - right_prec, 594 right_prec); 595 bufend -= decimal_point_size; 596 memcpy(bufend, decimal_point, decimal_point_size); 597 avalue_size -= (right_prec + 1); 598 } 599 600 if ((*flags & NEED_GROUPING) && 601 thousands_sep_size > 0 && /* XXX: need investigation */ 602 *grouping != CHAR_MAX && 603 *grouping > 0) { 604 while (avalue_size > (int)*grouping) { 605 GRPCPY(*grouping); 606 GRPSEP; 607 grouping++; 608 609 /* no more grouping ? */ 610 if (*grouping == CHAR_MAX) 611 break; 612 613 /* rest grouping with same value ? */ 614 if (*grouping == 0) { 615 grouping--; 616 while (avalue_size > *grouping) { 617 GRPCPY(*grouping); 618 GRPSEP; 619 } 620 } 621 } 622 if (avalue_size != 0) 623 GRPCPY(avalue_size); 624 padded -= groups; 625 } else { 626 bufend -= avalue_size; 627 memcpy(bufend, avalue + padded, avalue_size); 628 /* decrease assumed $decimal_point */ 629 if (right_prec == 0) 630 padded -= decimal_point_size; 631 } 632 633 /* do padding with pad_char */ 634 if (padded > 0) { 635 bufend -= padded; 636 memset(bufend, pad_char, padded); 637 } 638 639 bufsize = rslt + bufsize - bufend; 640 memmove(rslt, bufend, bufsize); 641 free(avalue); 642 return (rslt); 643 } 644 645 ssize_t 646 strfmon(char * __restrict s, size_t maxsize, const char * __restrict format, 647 ...) 648 { 649 size_t ret; 650 va_list ap; 651 652 va_start(ap, format); 653 ret = vstrfmon_l(s, maxsize, __get_locale(), format, ap); 654 va_end(ap); 655 656 return (ret); 657 } 658 659 ssize_t 660 strfmon_l(char * __restrict s, size_t maxsize, locale_t loc, 661 const char * __restrict format, ...) 662 { 663 size_t ret; 664 va_list ap; 665 666 va_start(ap, format); 667 ret = vstrfmon_l(s, maxsize, loc, format, ap); 668 va_end(ap); 669 670 return (ret); 671 } 672