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 * All rights reserved. 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 #include "xlocale_private.h" 49 50 /* internal flags */ 51 #define NEED_GROUPING 0x01 /* print digits grouped (default) */ 52 #define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */ 53 #define LOCALE_POSN 0x04 /* use locale defined +/- (default) */ 54 #define PARENTH_POSN 0x08 /* enclose negative amount in () */ 55 #define SUPRESS_CURR_SYMBOL 0x10 /* suppress the currency from output */ 56 #define LEFT_JUSTIFY 0x20 /* left justify */ 57 #define USE_INTL_CURRENCY 0x40 /* use international currency symbol */ 58 #define IS_NEGATIVE 0x80 /* is argument value negative ? */ 59 60 /* internal macros */ 61 #define PRINT(CH) do { \ 62 if (dst >= s + maxsize) \ 63 goto e2big_error; \ 64 *dst++ = CH; \ 65 } while (0) 66 67 #define PRINTS(STR) do { \ 68 char *tmps = STR; \ 69 while (*tmps != '\0') \ 70 PRINT(*tmps++); \ 71 } while (0) 72 73 #define GET_NUMBER(VAR) do { \ 74 VAR = 0; \ 75 while (isdigit((unsigned char)*fmt)) { \ 76 if (VAR > INT_MAX / 10) \ 77 goto e2big_error; \ 78 VAR *= 10; \ 79 VAR += *fmt - '0'; \ 80 if (VAR < 0) \ 81 goto e2big_error; \ 82 fmt++; \ 83 } \ 84 } while (0) 85 86 #define GRPCPY(howmany) do { \ 87 int i = howmany; \ 88 while (i-- > 0) { \ 89 avalue_size--; \ 90 *--bufend = *(avalue+avalue_size+padded); \ 91 } \ 92 } while (0) 93 94 #define GRPSEP do { \ 95 bufend -= thousands_sep_size; \ 96 memcpy(bufend, thousands_sep, thousands_sep_size); \ 97 groups++; \ 98 } while (0) 99 100 static void __setup_vars(int, char *, char *, char *, char **); 101 static int __calc_left_pad(int, char *); 102 static char *__format_grouped_double(double, int *, int, int, int); 103 104 static ssize_t 105 vstrfmon_l(char * __restrict s, size_t maxsize, locale_t loc, 106 const char * __restrict format, va_list ap) 107 { 108 char *dst; /* output destination pointer */ 109 const char *fmt; /* current format poistion pointer */ 110 struct lconv *lc; /* pointer to lconv structure */ 111 char *asciivalue; /* formatted double pointer */ 112 113 int flags; /* formatting options */ 114 int pad_char; /* padding character */ 115 int pad_size; /* pad size */ 116 int width; /* field width */ 117 int left_prec; /* left precision */ 118 int right_prec; /* right precision */ 119 double value; /* just value */ 120 char space_char = ' '; /* space after currency */ 121 122 char cs_precedes, /* values gathered from struct lconv */ 123 sep_by_space, 124 sign_posn, 125 *signstr, 126 *currency_symbol; 127 128 char *tmpptr; /* temporary vars */ 129 int sverrno; 130 FIX_LOCALE(loc); 131 132 133 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 |= SUPRESS_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 internaltion 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 space_char = *(currency_symbol+3); 244 } else 245 currency_symbol = strdup(lc->currency_symbol); 246 247 if (currency_symbol == NULL) 248 goto end_error; /* ENOMEM. */ 249 250 /* value itself */ 251 value = va_arg(ap, double); 252 253 /* detect sign */ 254 if (value < 0) { 255 flags |= IS_NEGATIVE; 256 value = -value; 257 } 258 259 /* fill left_prec with amount of padding chars */ 260 if (left_prec >= 0) { 261 pad_size = __calc_left_pad((flags ^ IS_NEGATIVE), 262 currency_symbol) - 263 __calc_left_pad(flags, currency_symbol); 264 if (pad_size < 0) 265 pad_size = 0; 266 } 267 268 if (asciivalue != NULL) 269 free(asciivalue); 270 asciivalue = __format_grouped_double(value, &flags, 271 left_prec, right_prec, pad_char); 272 if (asciivalue == NULL) 273 goto end_error; /* errno already set */ 274 /* to ENOMEM by malloc() */ 275 276 /* set some variables for later use */ 277 __setup_vars(flags, &cs_precedes, &sep_by_space, 278 &sign_posn, &signstr); 279 280 /* 281 * Description of some LC_MONETARY's values: 282 * 283 * p_cs_precedes & n_cs_precedes 284 * 285 * = 1 - $currency_symbol precedes the value 286 * for a monetary quantity with a non-negative value 287 * = 0 - symbol succeeds the value 288 * 289 * p_sep_by_space & n_sep_by_space 290 * 291 * = 0 - no space separates $currency_symbol 292 * from the value for a monetary quantity with a 293 * non-negative value 294 * = 1 - space separates the symbol from the value 295 * = 2 - space separates the symbol and the sign string, 296 * if adjacent. 297 * 298 * p_sign_posn & n_sign_posn 299 * 300 * = 0 - parentheses enclose the quantity and the 301 * $currency_symbol 302 * = 1 - the sign string precedes the quantity and the 303 * $currency_symbol 304 * = 2 - the sign string succeeds the quantity and the 305 * $currency_symbol 306 * = 3 - the sign string precedes the $currency_symbol 307 * = 4 - the sign string succeeds the $currency_symbol 308 * 309 */ 310 311 tmpptr = dst; 312 313 while (pad_size-- > 0) 314 PRINT(' '); 315 316 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 317 PRINT('('); 318 319 if (cs_precedes == 1) { 320 if (sign_posn == 1 || sign_posn == 3) { 321 PRINTS(signstr); 322 if (sep_by_space == 2) /* XXX: ? */ 323 PRINT(' '); 324 } 325 326 if (!(flags & SUPRESS_CURR_SYMBOL)) { 327 PRINTS(currency_symbol); 328 329 if (sign_posn == 4) { 330 if (sep_by_space == 2) 331 PRINT(space_char); 332 PRINTS(signstr); 333 if (sep_by_space == 1) 334 PRINT(' '); 335 } else if (sep_by_space == 1) 336 PRINT(space_char); 337 } 338 } else if (sign_posn == 1) 339 PRINTS(signstr); 340 341 PRINTS(asciivalue); 342 343 if (cs_precedes == 0) { 344 if (sign_posn == 3) { 345 if (sep_by_space == 1) 346 PRINT(' '); 347 PRINTS(signstr); 348 } 349 350 if (!(flags & SUPRESS_CURR_SYMBOL)) { 351 if ((sign_posn == 3 && sep_by_space == 2) 352 || (sep_by_space == 1 353 && (sign_posn == 0 354 || sign_posn == 1 355 || sign_posn == 2 356 || sign_posn == 4))) 357 PRINT(space_char); 358 PRINTS(currency_symbol); /* XXX: len */ 359 if (sign_posn == 4) { 360 if (sep_by_space == 2) 361 PRINT(' '); 362 PRINTS(signstr); 363 } 364 } 365 } 366 367 if (sign_posn == 2) { 368 if (sep_by_space == 2) 369 PRINT(' '); 370 PRINTS(signstr); 371 } 372 373 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 374 PRINT(')'); 375 376 if (dst - tmpptr < width) { 377 if (flags & LEFT_JUSTIFY) { 378 while (dst - tmpptr < width) 379 PRINT(' '); 380 } else { 381 pad_size = dst-tmpptr; 382 memmove(tmpptr + width-pad_size, tmpptr, 383 pad_size); 384 memset(tmpptr, ' ', width-pad_size); 385 dst += width-pad_size; 386 } 387 } 388 } 389 390 PRINT('\0'); 391 free(asciivalue); 392 free(currency_symbol); 393 return (dst - s - 1); /* return size of put data except trailing '\0' */ 394 395 e2big_error: 396 errno = E2BIG; 397 goto end_error; 398 399 format_error: 400 errno = EINVAL; 401 402 end_error: 403 sverrno = errno; 404 if (asciivalue != NULL) 405 free(asciivalue); 406 if (currency_symbol != NULL) 407 free(currency_symbol); 408 errno = sverrno; 409 return (-1); 410 } 411 ssize_t 412 strfmon_l(char * __restrict s, size_t maxsize, locale_t loc, const char * __restrict format, 413 ...) 414 { 415 size_t ret; 416 va_list ap; 417 va_start(ap, format); 418 ret = vstrfmon_l(s, maxsize, loc, format, ap); 419 va_end(ap); 420 return ret; 421 } 422 423 ssize_t 424 strfmon(char * __restrict s, size_t maxsize, const char * __restrict format, 425 ...) 426 { 427 size_t ret; 428 va_list ap; 429 va_start(ap, format); 430 ret = vstrfmon_l(s, maxsize, __get_locale(), format, ap); 431 va_end(ap); 432 return ret; 433 } 434 435 436 static void 437 __setup_vars(int flags, char *cs_precedes, char *sep_by_space, 438 char *sign_posn, char **signstr) { 439 440 struct lconv *lc = localeconv(); 441 442 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) { 443 *cs_precedes = lc->int_n_cs_precedes; 444 *sep_by_space = lc->int_n_sep_by_space; 445 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn; 446 *signstr = (lc->negative_sign[0] == '\0') ? "-" 447 : lc->negative_sign; 448 } else if (flags & USE_INTL_CURRENCY) { 449 *cs_precedes = lc->int_p_cs_precedes; 450 *sep_by_space = lc->int_p_sep_by_space; 451 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn; 452 *signstr = lc->positive_sign; 453 } else if (flags & IS_NEGATIVE) { 454 *cs_precedes = lc->n_cs_precedes; 455 *sep_by_space = lc->n_sep_by_space; 456 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn; 457 *signstr = (lc->negative_sign[0] == '\0') ? "-" 458 : lc->negative_sign; 459 } else { 460 *cs_precedes = lc->p_cs_precedes; 461 *sep_by_space = lc->p_sep_by_space; 462 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn; 463 *signstr = lc->positive_sign; 464 } 465 466 /* Set defult values for unspecified information. */ 467 if (*cs_precedes != 0) 468 *cs_precedes = 1; 469 if (*sep_by_space == CHAR_MAX) 470 *sep_by_space = 0; 471 if (*sign_posn == CHAR_MAX) 472 *sign_posn = 0; 473 } 474 475 static int 476 __calc_left_pad(int flags, char *cur_symb) { 477 478 char cs_precedes, sep_by_space, sign_posn, *signstr; 479 int left_chars = 0; 480 481 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr); 482 483 if (cs_precedes != 0) { 484 left_chars += strlen(cur_symb); 485 if (sep_by_space != 0) 486 left_chars++; 487 } 488 489 switch (sign_posn) { 490 case 1: 491 left_chars += strlen(signstr); 492 break; 493 case 3: 494 case 4: 495 if (cs_precedes != 0) 496 left_chars += strlen(signstr); 497 } 498 return (left_chars); 499 } 500 501 static int 502 get_groups(int size, char *grouping) { 503 504 int chars = 0; 505 506 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */ 507 return (0); 508 509 while (size > (int)*grouping) { 510 chars++; 511 size -= (int)*grouping++; 512 /* no more grouping ? */ 513 if (*grouping == CHAR_MAX) 514 break; 515 /* rest grouping with same value ? */ 516 if (*grouping == 0) { 517 chars += (size - 1) / *(grouping - 1); 518 break; 519 } 520 } 521 return (chars); 522 } 523 524 /* convert double to locale-encoded string */ 525 static char * 526 __format_grouped_double(double value, int *flags, 527 int left_prec, int right_prec, int pad_char) { 528 529 char *rslt; 530 char *avalue; 531 int avalue_size; 532 533 size_t bufsize; 534 char *bufend; 535 536 int padded; 537 538 struct lconv *lc = localeconv(); 539 char *grouping; 540 const char *decimal_point; 541 const char *thousands_sep; 542 size_t decimal_point_size; 543 size_t thousands_sep_size; 544 545 int groups = 0; 546 547 grouping = lc->mon_grouping; 548 decimal_point = lc->mon_decimal_point; 549 if (*decimal_point == '\0') 550 decimal_point = lc->decimal_point; 551 thousands_sep = lc->mon_thousands_sep; 552 if (*thousands_sep == '\0') 553 thousands_sep = lc->thousands_sep; 554 555 decimal_point_size = strlen(decimal_point); 556 thousands_sep_size = strlen(thousands_sep); 557 558 /* fill left_prec with default value */ 559 if (left_prec == -1) 560 left_prec = 0; 561 562 /* fill right_prec with default value */ 563 if (right_prec == -1) { 564 if (*flags & USE_INTL_CURRENCY) 565 right_prec = lc->int_frac_digits; 566 else 567 right_prec = lc->frac_digits; 568 569 if (right_prec == CHAR_MAX) /* POSIX locale ? */ 570 right_prec = 2; 571 } 572 573 if (*flags & NEED_GROUPING) 574 left_prec += get_groups(left_prec, grouping); 575 576 /* convert to string */ 577 avalue_size = asprintf(&avalue, "%*.*f", left_prec + right_prec + 1, 578 right_prec, value); 579 if (avalue_size < 0) 580 return (NULL); 581 582 /* make sure that we've enough space for result string */ 583 bufsize = avalue_size * (1 + thousands_sep_size) + decimal_point_size + 584 1; 585 rslt = calloc(1, bufsize); 586 if (rslt == NULL) { 587 free(avalue); 588 return (NULL); 589 } 590 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 591 592 /* skip spaces at beginning */ 593 padded = 0; 594 while (avalue[padded] == ' ') { 595 padded++; 596 avalue_size--; 597 } 598 599 if (right_prec > 0) { 600 bufend -= right_prec; 601 memcpy(bufend, avalue + avalue_size+padded-right_prec, 602 right_prec); 603 bufend -= decimal_point_size; 604 memcpy(bufend, decimal_point, decimal_point_size); 605 avalue_size -= (right_prec + 1); 606 } 607 608 if ((*flags & NEED_GROUPING) && 609 thousands_sep_size > 0 && /* XXX: need investigation */ 610 *grouping != CHAR_MAX && 611 *grouping > 0) { 612 while (avalue_size > (int)*grouping) { 613 GRPCPY(*grouping); 614 GRPSEP; 615 grouping++; 616 617 /* no more grouping ? */ 618 if (*grouping == CHAR_MAX) 619 break; 620 621 /* rest grouping with same value ? */ 622 if (*grouping == 0) { 623 grouping--; 624 while (avalue_size > *grouping) { 625 GRPCPY(*grouping); 626 GRPSEP; 627 } 628 } 629 } 630 if (avalue_size != 0) 631 GRPCPY(avalue_size); 632 padded -= groups; 633 634 } else { 635 bufend -= avalue_size; 636 memcpy(bufend, avalue+padded, avalue_size); 637 /* decrease assumed $decimal_point */ 638 if (right_prec == 0) 639 padded -= decimal_point_size; 640 } 641 642 /* do padding with pad_char */ 643 if (padded > 0) { 644 bufend -= padded; 645 memset(bufend, pad_char, padded); 646 } 647 648 bufsize = rslt + bufsize - bufend; 649 memmove(rslt, bufend, bufsize); 650 free(avalue); 651 return (rslt); 652 } 653