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 pad_size = 0; 139 140 while (*fmt) { 141 /* pass nonformating characters AS IS */ 142 if (*fmt != '%') 143 goto literal; 144 145 /* '%' found ! */ 146 147 /* "%%" mean just '%' */ 148 if (*(fmt + 1) == '%') { 149 fmt++; 150 literal: 151 PRINT(*fmt++); 152 continue; 153 } 154 155 /* set up initial values */ 156 flags = (NEED_GROUPING|LOCALE_POSN); 157 pad_char = ' '; /* padding character is "space" */ 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 } else 246 currency_symbol = strdup(lc->currency_symbol); 247 248 if (currency_symbol == NULL) 249 goto end_error; /* ENOMEM. */ 250 251 /* value itself */ 252 value = va_arg(ap, double); 253 254 /* detect sign */ 255 if (value < 0) { 256 flags |= IS_NEGATIVE; 257 value = -value; 258 } 259 260 /* fill left_prec with amount of padding chars */ 261 if (left_prec >= 0) { 262 pad_size = __calc_left_pad((flags ^ IS_NEGATIVE), 263 currency_symbol) - 264 __calc_left_pad(flags, currency_symbol); 265 if (pad_size < 0) 266 pad_size = 0; 267 } 268 269 if (asciivalue != NULL) 270 free(asciivalue); 271 asciivalue = __format_grouped_double(value, &flags, 272 left_prec, right_prec, pad_char); 273 if (asciivalue == NULL) 274 goto end_error; /* errno already set */ 275 /* to ENOMEM by malloc() */ 276 277 /* set some variables for later use */ 278 __setup_vars(flags, &cs_precedes, &sep_by_space, 279 &sign_posn, &signstr); 280 281 /* 282 * Description of some LC_MONETARY's values: 283 * 284 * p_cs_precedes & n_cs_precedes 285 * 286 * = 1 - $currency_symbol precedes the value 287 * for a monetary quantity with a non-negative value 288 * = 0 - symbol succeeds the value 289 * 290 * p_sep_by_space & n_sep_by_space 291 * 292 * = 0 - no space separates $currency_symbol 293 * from the value for a monetary quantity with a 294 * non-negative value 295 * = 1 - space separates the symbol from the value 296 * = 2 - space separates the symbol and the sign string, 297 * if adjacent. 298 * 299 * p_sign_posn & n_sign_posn 300 * 301 * = 0 - parentheses enclose the quantity and the 302 * $currency_symbol 303 * = 1 - the sign string precedes the quantity and the 304 * $currency_symbol 305 * = 2 - the sign string succeeds the quantity and the 306 * $currency_symbol 307 * = 3 - the sign string precedes the $currency_symbol 308 * = 4 - the sign string succeeds the $currency_symbol 309 * 310 */ 311 312 tmpptr = dst; 313 314 while (pad_size-- > 0) 315 PRINT(' '); 316 317 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 318 PRINT('('); 319 320 if (cs_precedes == 1) { 321 if (sign_posn == 1 || sign_posn == 3) { 322 PRINTS(signstr); 323 if (sep_by_space == 2) /* XXX: ? */ 324 PRINT(' '); 325 } 326 327 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 328 PRINTS(currency_symbol); 329 330 if (sign_posn == 4) { 331 if (sep_by_space == 2) 332 PRINT(space_char); 333 PRINTS(signstr); 334 if (sep_by_space == 1) 335 PRINT(' '); 336 } else if (sep_by_space == 1) 337 PRINT(space_char); 338 } 339 } else if (sign_posn == 1) 340 PRINTS(signstr); 341 342 PRINTS(asciivalue); 343 344 if (cs_precedes == 0) { 345 if (sign_posn == 3) { 346 if (sep_by_space == 1) 347 PRINT(' '); 348 PRINTS(signstr); 349 } 350 351 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 352 if ((sign_posn == 3 && sep_by_space == 2) 353 || (sep_by_space == 1 354 && (sign_posn == 0 355 || sign_posn == 1 356 || sign_posn == 2 357 || sign_posn == 4))) 358 PRINT(space_char); 359 PRINTS(currency_symbol); /* XXX: len */ 360 if (sign_posn == 4) { 361 if (sep_by_space == 2) 362 PRINT(' '); 363 PRINTS(signstr); 364 } 365 } 366 } 367 368 if (sign_posn == 2) { 369 if (sep_by_space == 2) 370 PRINT(' '); 371 PRINTS(signstr); 372 } 373 374 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 375 PRINT(')'); 376 377 if (dst - tmpptr < width) { 378 if (flags & LEFT_JUSTIFY) { 379 while (dst - tmpptr < width) 380 PRINT(' '); 381 } else { 382 pad_size = dst - tmpptr; 383 memmove(tmpptr + width - pad_size, tmpptr, 384 pad_size); 385 memset(tmpptr, ' ', width - pad_size); 386 dst += width - pad_size; 387 } 388 } 389 } 390 391 PRINT('\0'); 392 free(asciivalue); 393 free(currency_symbol); 394 return (dst - s - 1); /* return size of put data except trailing '\0' */ 395 396 e2big_error: 397 errno = E2BIG; 398 goto end_error; 399 400 format_error: 401 errno = EINVAL; 402 403 end_error: 404 sverrno = errno; 405 if (asciivalue != NULL) 406 free(asciivalue); 407 if (currency_symbol != NULL) 408 free(currency_symbol); 409 errno = sverrno; 410 return (-1); 411 } 412 413 static void 414 __setup_vars(int flags, char *cs_precedes, char *sep_by_space, 415 char *sign_posn, char **signstr) 416 { 417 struct lconv *lc = localeconv(); 418 419 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) { 420 *cs_precedes = lc->int_n_cs_precedes; 421 *sep_by_space = lc->int_n_sep_by_space; 422 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn; 423 *signstr = (lc->negative_sign[0] == '\0') ? "-" 424 : lc->negative_sign; 425 } else if (flags & USE_INTL_CURRENCY) { 426 *cs_precedes = lc->int_p_cs_precedes; 427 *sep_by_space = lc->int_p_sep_by_space; 428 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn; 429 *signstr = lc->positive_sign; 430 } else if (flags & IS_NEGATIVE) { 431 *cs_precedes = lc->n_cs_precedes; 432 *sep_by_space = lc->n_sep_by_space; 433 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn; 434 *signstr = (lc->negative_sign[0] == '\0') ? "-" 435 : lc->negative_sign; 436 } else { 437 *cs_precedes = lc->p_cs_precedes; 438 *sep_by_space = lc->p_sep_by_space; 439 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn; 440 *signstr = lc->positive_sign; 441 } 442 443 /* Set default values for unspecified information. */ 444 if (*cs_precedes != 0) 445 *cs_precedes = 1; 446 if (*sep_by_space == CHAR_MAX) 447 *sep_by_space = 0; 448 if (*sign_posn == CHAR_MAX) 449 *sign_posn = 0; 450 } 451 452 static int 453 __calc_left_pad(int flags, char *cur_symb) 454 { 455 char cs_precedes, sep_by_space, sign_posn, *signstr; 456 int left_chars = 0; 457 458 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr); 459 460 if (cs_precedes != 0) { 461 left_chars += strlen(cur_symb); 462 if (sep_by_space != 0) 463 left_chars++; 464 } 465 466 switch (sign_posn) { 467 case 1: 468 left_chars += strlen(signstr); 469 break; 470 case 3: 471 case 4: 472 if (cs_precedes != 0) 473 left_chars += strlen(signstr); 474 } 475 return (left_chars); 476 } 477 478 static int 479 get_groups(int size, char *grouping) 480 { 481 int chars = 0; 482 483 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */ 484 return (0); 485 486 while (size > (int)*grouping) { 487 chars++; 488 size -= (int)*grouping++; 489 /* no more grouping ? */ 490 if (*grouping == CHAR_MAX) 491 break; 492 /* rest grouping with same value ? */ 493 if (*grouping == 0) { 494 chars += (size - 1) / *(grouping - 1); 495 break; 496 } 497 } 498 return (chars); 499 } 500 501 /* convert double to locale-encoded string */ 502 static char * 503 __format_grouped_double(double value, int *flags, 504 int left_prec, int right_prec, int pad_char) 505 { 506 507 char *rslt; 508 char *avalue; 509 int avalue_size; 510 511 size_t bufsize; 512 char *bufend; 513 514 int padded; 515 516 struct lconv *lc = localeconv(); 517 char *grouping; 518 const char *decimal_point; 519 const char *thousands_sep; 520 size_t decimal_point_size; 521 size_t thousands_sep_size; 522 523 int groups = 0; 524 525 grouping = lc->mon_grouping; 526 decimal_point = lc->mon_decimal_point; 527 if (*decimal_point == '\0') 528 decimal_point = lc->decimal_point; 529 thousands_sep = lc->mon_thousands_sep; 530 if (*thousands_sep == '\0') 531 thousands_sep = lc->thousands_sep; 532 533 decimal_point_size = strlen(decimal_point); 534 thousands_sep_size = strlen(thousands_sep); 535 536 /* fill left_prec with default value */ 537 if (left_prec == -1) 538 left_prec = 0; 539 540 /* fill right_prec with default value */ 541 if (right_prec == -1) { 542 if (*flags & USE_INTL_CURRENCY) 543 right_prec = lc->int_frac_digits; 544 else 545 right_prec = lc->frac_digits; 546 547 if (right_prec == CHAR_MAX) /* POSIX locale ? */ 548 right_prec = 2; 549 } 550 551 if (*flags & NEED_GROUPING) 552 left_prec += get_groups(left_prec, grouping); 553 554 /* convert to string */ 555 avalue_size = asprintf(&avalue, "%*.*f", left_prec + right_prec + 1, 556 right_prec, value); 557 if (avalue_size < 0) 558 return (NULL); 559 560 /* make sure that we've enough space for result string */ 561 bufsize = avalue_size * (1 + thousands_sep_size) + decimal_point_size + 562 1; 563 rslt = calloc(1, bufsize); 564 if (rslt == NULL) { 565 free(avalue); 566 return (NULL); 567 } 568 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 569 570 /* skip spaces at beginning */ 571 padded = 0; 572 while (avalue[padded] == ' ') { 573 padded++; 574 avalue_size--; 575 } 576 577 if (right_prec > 0) { 578 bufend -= right_prec; 579 memcpy(bufend, avalue + avalue_size + padded - right_prec, 580 right_prec); 581 bufend -= decimal_point_size; 582 memcpy(bufend, decimal_point, decimal_point_size); 583 avalue_size -= (right_prec + 1); 584 } 585 586 if ((*flags & NEED_GROUPING) && 587 thousands_sep_size > 0 && /* XXX: need investigation */ 588 *grouping != CHAR_MAX && 589 *grouping > 0) { 590 while (avalue_size > (int)*grouping) { 591 GRPCPY(*grouping); 592 GRPSEP; 593 grouping++; 594 595 /* no more grouping ? */ 596 if (*grouping == CHAR_MAX) 597 break; 598 599 /* rest grouping with same value ? */ 600 if (*grouping == 0) { 601 grouping--; 602 while (avalue_size > *grouping) { 603 GRPCPY(*grouping); 604 GRPSEP; 605 } 606 } 607 } 608 if (avalue_size != 0) 609 GRPCPY(avalue_size); 610 padded -= groups; 611 } else { 612 bufend -= avalue_size; 613 memcpy(bufend, avalue + padded, avalue_size); 614 /* decrease assumed $decimal_point */ 615 if (right_prec == 0) 616 padded -= decimal_point_size; 617 } 618 619 /* do padding with pad_char */ 620 if (padded > 0) { 621 bufend -= padded; 622 memset(bufend, pad_char, padded); 623 } 624 625 bufsize = rslt + bufsize - bufend; 626 memmove(rslt, bufend, bufsize); 627 free(avalue); 628 return (rslt); 629 } 630 631 ssize_t 632 strfmon(char * __restrict s, size_t maxsize, const char * __restrict format, 633 ...) 634 { 635 size_t ret; 636 va_list ap; 637 638 va_start(ap, format); 639 ret = vstrfmon_l(s, maxsize, __get_locale(), format, ap); 640 va_end(ap); 641 642 return (ret); 643 } 644 645 ssize_t 646 strfmon_l(char * __restrict s, size_t maxsize, locale_t loc, 647 const char * __restrict format, ...) 648 { 649 size_t ret; 650 va_list ap; 651 652 va_start(ap, format); 653 ret = vstrfmon_l(s, maxsize, loc, format, ap); 654 va_end(ap); 655 656 return (ret); 657 } 658