1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/types.h> 36 #include <ctype.h> 37 #include <errno.h> 38 #include <limits.h> 39 #include <locale.h> 40 #include <monetary.h> 41 #include <stdarg.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "xlocale_private.h" 47 48 /* internal flags */ 49 #define NEED_GROUPING 0x01 /* print digits grouped (default) */ 50 #define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */ 51 #define LOCALE_POSN 0x04 /* use locale defined +/- (default) */ 52 #define PARENTH_POSN 0x08 /* enclose negative amount in () */ 53 #define SUPPRESS_CURR_SYMBOL 0x10 /* suppress the currency from output */ 54 #define LEFT_JUSTIFY 0x20 /* left justify */ 55 #define USE_INTL_CURRENCY 0x40 /* use international currency symbol */ 56 #define IS_NEGATIVE 0x80 /* is argument value negative ? */ 57 58 /* internal macros */ 59 #define PRINT(CH) do { \ 60 if (dst >= s + maxsize) \ 61 goto e2big_error; \ 62 *dst++ = CH; \ 63 } while (0) 64 65 #define PRINTS(STR) do { \ 66 char *tmps = STR; \ 67 while (*tmps != '\0') \ 68 PRINT(*tmps++); \ 69 } while (0) 70 71 #define GET_NUMBER(VAR, LOC) do { \ 72 VAR = 0; \ 73 while (isdigit_l((unsigned char)*fmt, LOC)) { \ 74 if (VAR > INT_MAX / 10) \ 75 goto e2big_error; \ 76 VAR *= 10; \ 77 VAR += *fmt - '0'; \ 78 if (VAR < 0) \ 79 goto e2big_error; \ 80 fmt++; \ 81 } \ 82 } while (0) 83 84 #define GRPCPY(howmany) do { \ 85 int i = howmany; \ 86 while (i-- > 0) { \ 87 avalue_size--; \ 88 *--bufend = *(avalue + avalue_size + padded); \ 89 } \ 90 } while (0) 91 92 #define GRPSEP do { \ 93 bufend -= thousands_sep_size; \ 94 memcpy(bufend, thousands_sep, thousands_sep_size); \ 95 groups++; \ 96 } while (0) 97 98 static void __setup_vars(int, char *, char *, char *, char **, struct lconv *); 99 static int __calc_left_pad(int, char *, struct lconv *); 100 static char *__format_grouped_double(double, int *, int, int, int, 101 struct lconv *, locale_t); 102 103 static ssize_t 104 vstrfmon_l(char * __restrict s, size_t maxsize, locale_t loc, 105 const char * __restrict format, va_list ap) 106 { 107 char *dst; /* output destination pointer */ 108 const char *fmt; /* current format poistion pointer */ 109 struct lconv *lc; /* pointer to lconv structure */ 110 char *asciivalue; /* formatted double pointer */ 111 112 int flags; /* formatting options */ 113 int pad_char; /* padding character */ 114 int pad_size; /* pad size */ 115 int width; /* field width */ 116 int left_prec; /* left precision */ 117 int right_prec; /* right precision */ 118 double value; /* just value */ 119 char space_char = ' '; /* space after currency */ 120 121 char cs_precedes, /* values gathered from struct lconv */ 122 sep_by_space, 123 sign_posn, 124 *signstr, 125 *currency_symbol; 126 127 char *tmpptr; /* temporary vars */ 128 int sverrno; 129 FIX_LOCALE(loc); 130 131 lc = localeconv_l(loc); 132 dst = s; 133 fmt = format; 134 asciivalue = NULL; 135 currency_symbol = NULL; 136 137 while (*fmt) { 138 /* pass nonformating characters AS IS */ 139 if (*fmt != '%') 140 goto literal; 141 142 /* '%' found ! */ 143 144 /* "%%" mean just '%' */ 145 if (*(fmt + 1) == '%') { 146 fmt++; 147 literal: 148 PRINT(*fmt++); 149 continue; 150 } 151 152 /* set up initial values */ 153 flags = (NEED_GROUPING|LOCALE_POSN); 154 pad_char = ' '; /* padding character is "space" */ 155 pad_size = 0; /* no padding initially */ 156 left_prec = -1; /* no left precision specified */ 157 right_prec = -1; /* no right precision specified */ 158 width = -1; /* no width specified */ 159 value = 0; /* we have no value to print now */ 160 161 /* Flags */ 162 while (1) { 163 switch (*++fmt) { 164 case '=': /* fill character */ 165 pad_char = *++fmt; 166 if (pad_char == '\0') 167 goto format_error; 168 continue; 169 case '^': /* not group currency */ 170 flags &= ~(NEED_GROUPING); 171 continue; 172 case '+': /* use locale defined signs */ 173 if (flags & SIGN_POSN_USED) 174 goto format_error; 175 flags |= (SIGN_POSN_USED|LOCALE_POSN); 176 continue; 177 case '(': /* enclose negatives with () */ 178 if (flags & SIGN_POSN_USED) 179 goto format_error; 180 flags |= (SIGN_POSN_USED|PARENTH_POSN); 181 continue; 182 case '!': /* suppress currency symbol */ 183 flags |= SUPPRESS_CURR_SYMBOL; 184 continue; 185 case '-': /* alignment (left) */ 186 flags |= LEFT_JUSTIFY; 187 continue; 188 default: 189 break; 190 } 191 break; 192 } 193 194 /* field Width */ 195 if (isdigit_l((unsigned char)*fmt, loc)) { 196 GET_NUMBER(width, loc); 197 /* Do we have enough space to put number with 198 * required width ? 199 */ 200 if ((unsigned int)width >= maxsize - (dst - s)) 201 goto e2big_error; 202 } 203 204 /* Left precision */ 205 if (*fmt == '#') { 206 if (!isdigit_l((unsigned char)*++fmt, loc)) 207 goto format_error; 208 GET_NUMBER(left_prec, loc); 209 if ((unsigned int)left_prec >= maxsize - (dst - s)) 210 goto e2big_error; 211 } 212 213 /* Right precision */ 214 if (*fmt == '.') { 215 if (!isdigit_l((unsigned char)*++fmt, loc)) 216 goto format_error; 217 GET_NUMBER(right_prec, loc); 218 if ((unsigned int)right_prec >= maxsize - (dst - s) - 219 left_prec) 220 goto e2big_error; 221 } 222 223 /* Conversion Characters */ 224 switch (*fmt++) { 225 case 'i': /* use international currency format */ 226 flags |= USE_INTL_CURRENCY; 227 break; 228 case 'n': /* use national currency format */ 229 flags &= ~(USE_INTL_CURRENCY); 230 break; 231 default: /* required character is missing or 232 premature EOS */ 233 goto format_error; 234 } 235 236 if (currency_symbol != NULL) 237 free(currency_symbol); 238 if (flags & USE_INTL_CURRENCY) { 239 currency_symbol = strdup(lc->int_curr_symbol); 240 if (currency_symbol != NULL && 241 strlen(currency_symbol) > 3) { 242 space_char = currency_symbol[3]; 243 currency_symbol[3] = '\0'; 244 } 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, lc) - 264 __calc_left_pad(flags, currency_symbol, lc); 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, lc, loc); 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, lc); 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; otherwise, a space separates 298 * the sign string from the value 299 * 300 * p_sign_posn & n_sign_posn 301 * 302 * = 0 - parentheses enclose the quantity and the 303 * $currency_symbol 304 * = 1 - the sign string precedes the quantity and the 305 * $currency_symbol 306 * = 2 - the sign string succeeds the quantity and the 307 * $currency_symbol 308 * = 3 - the sign string precedes the $currency_symbol 309 * = 4 - the sign string succeeds the $currency_symbol 310 * 311 */ 312 313 tmpptr = dst; 314 315 while (pad_size-- > 0) 316 PRINT(' '); 317 318 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 319 PRINT('('); 320 321 if (cs_precedes == 1) { 322 if (sign_posn == 1 || sign_posn == 3) { 323 PRINTS(signstr); 324 if (sep_by_space == 2) 325 PRINT(' '); 326 } 327 328 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 329 PRINTS(currency_symbol); 330 331 if (sign_posn == 4) { 332 if (sep_by_space == 2) 333 PRINT(space_char); 334 PRINTS(signstr); 335 if (sep_by_space == 1) 336 PRINT(' '); 337 } else if (sep_by_space == 1) 338 PRINT(space_char); 339 } 340 } else if (sign_posn == 1) { 341 PRINTS(signstr); 342 if (sep_by_space == 2) 343 PRINT(' '); 344 } 345 346 PRINTS(asciivalue); 347 348 if (cs_precedes == 0) { 349 if (sign_posn == 3) { 350 if (sep_by_space == 1) 351 PRINT(' '); 352 PRINTS(signstr); 353 } 354 355 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 356 if ((sign_posn == 3 && sep_by_space == 2) 357 || (sep_by_space == 1 358 && (sign_posn == 0 359 || sign_posn == 1 360 || sign_posn == 2 361 || sign_posn == 4))) 362 PRINT(space_char); 363 PRINTS(currency_symbol); 364 if (sign_posn == 4) { 365 if (sep_by_space == 2) 366 PRINT(' '); 367 PRINTS(signstr); 368 } 369 } 370 } 371 372 if (sign_posn == 2) { 373 if (sep_by_space == 2) 374 PRINT(' '); 375 PRINTS(signstr); 376 } 377 378 if (sign_posn == 0) { 379 if (flags & IS_NEGATIVE) 380 PRINT(')'); 381 else if (left_prec >= 0) 382 PRINT(' '); 383 } 384 385 if (dst - tmpptr < width) { 386 if (flags & LEFT_JUSTIFY) { 387 while (dst - tmpptr < width) 388 PRINT(' '); 389 } else { 390 pad_size = dst - tmpptr; 391 memmove(tmpptr + width - pad_size, tmpptr, 392 pad_size); 393 memset(tmpptr, ' ', width - pad_size); 394 dst += width - pad_size; 395 } 396 } 397 } 398 399 PRINT('\0'); 400 free(asciivalue); 401 free(currency_symbol); 402 return (dst - s - 1); /* return size of put data except trailing '\0' */ 403 404 e2big_error: 405 errno = E2BIG; 406 goto end_error; 407 408 format_error: 409 errno = EINVAL; 410 411 end_error: 412 sverrno = errno; 413 if (asciivalue != NULL) 414 free(asciivalue); 415 if (currency_symbol != NULL) 416 free(currency_symbol); 417 errno = sverrno; 418 return (-1); 419 } 420 421 static void 422 __setup_vars(int flags, char *cs_precedes, char *sep_by_space, 423 char *sign_posn, char **signstr, struct lconv *lc) 424 { 425 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) { 426 *cs_precedes = lc->int_n_cs_precedes; 427 *sep_by_space = lc->int_n_sep_by_space; 428 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn; 429 *signstr = (lc->negative_sign[0] == '\0') ? "-" 430 : lc->negative_sign; 431 } else if (flags & USE_INTL_CURRENCY) { 432 *cs_precedes = lc->int_p_cs_precedes; 433 *sep_by_space = lc->int_p_sep_by_space; 434 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn; 435 *signstr = lc->positive_sign; 436 } else if (flags & IS_NEGATIVE) { 437 *cs_precedes = lc->n_cs_precedes; 438 *sep_by_space = lc->n_sep_by_space; 439 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn; 440 *signstr = (lc->negative_sign[0] == '\0') ? "-" 441 : lc->negative_sign; 442 } else { 443 *cs_precedes = lc->p_cs_precedes; 444 *sep_by_space = lc->p_sep_by_space; 445 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn; 446 *signstr = lc->positive_sign; 447 } 448 449 /* Set default values for unspecified information. */ 450 if (*cs_precedes != 0) 451 *cs_precedes = 1; 452 if (*sep_by_space == CHAR_MAX) 453 *sep_by_space = 0; 454 if (*sign_posn == CHAR_MAX) 455 *sign_posn = 0; 456 } 457 458 static int 459 __calc_left_pad(int flags, char *cur_symb, struct lconv *lc) 460 { 461 char cs_precedes, sep_by_space, sign_posn, *signstr; 462 int left_chars = 0; 463 464 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, 465 &signstr, lc); 466 467 if (cs_precedes != 0) { 468 left_chars += strlen(cur_symb); 469 if (sep_by_space != 0) 470 left_chars++; 471 } 472 473 switch (sign_posn) { 474 case 0: 475 if (flags & IS_NEGATIVE) 476 left_chars++; 477 break; 478 case 1: 479 left_chars += strlen(signstr); 480 break; 481 case 3: 482 case 4: 483 if (cs_precedes != 0) 484 left_chars += strlen(signstr); 485 } 486 return (left_chars); 487 } 488 489 static int 490 get_groups(int size, char *grouping) 491 { 492 int chars = 0; 493 494 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */ 495 return (0); 496 497 while (size > (int)*grouping) { 498 chars++; 499 size -= (int)*grouping++; 500 /* no more grouping ? */ 501 if (*grouping == CHAR_MAX) 502 break; 503 /* rest grouping with same value ? */ 504 if (*grouping == 0) { 505 chars += (size - 1) / *(grouping - 1); 506 break; 507 } 508 } 509 return (chars); 510 } 511 512 /* convert double to locale-encoded string */ 513 static char * 514 __format_grouped_double(double value, int *flags, 515 int left_prec, int right_prec, int pad_char, struct lconv *lc, locale_t loc) 516 { 517 518 char *rslt; 519 char *avalue; 520 int avalue_size; 521 522 size_t bufsize; 523 char *bufend; 524 525 int padded; 526 527 char *grouping; 528 const char *decimal_point; 529 const char *thousands_sep; 530 size_t decimal_point_size; 531 size_t thousands_sep_size; 532 533 int groups = 0; 534 535 grouping = lc->mon_grouping; 536 decimal_point = lc->mon_decimal_point; 537 if (*decimal_point == '\0') 538 decimal_point = lc->decimal_point; 539 thousands_sep = lc->mon_thousands_sep; 540 if (*thousands_sep == '\0') 541 thousands_sep = lc->thousands_sep; 542 543 decimal_point_size = strlen(decimal_point); 544 thousands_sep_size = strlen(thousands_sep); 545 546 /* fill left_prec with default value */ 547 if (left_prec == -1) 548 left_prec = 0; 549 550 /* fill right_prec with default value */ 551 if (right_prec == -1) { 552 if (*flags & USE_INTL_CURRENCY) 553 right_prec = lc->int_frac_digits; 554 else 555 right_prec = lc->frac_digits; 556 557 if (right_prec == CHAR_MAX) /* POSIX locale ? */ 558 right_prec = 2; 559 } 560 561 if (*flags & NEED_GROUPING) 562 left_prec += get_groups(left_prec, grouping); 563 564 /* convert to string */ 565 avalue_size = asprintf_l(&avalue, loc, "%*.*f", 566 left_prec + right_prec + 1, right_prec, value); 567 if (avalue_size < 0) 568 return (NULL); 569 570 /* make sure that we've enough space for result string */ 571 bufsize = avalue_size * (1 + thousands_sep_size) + decimal_point_size + 572 1; 573 rslt = calloc(1, bufsize); 574 if (rslt == NULL) { 575 free(avalue); 576 return (NULL); 577 } 578 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 579 580 /* skip spaces at beginning */ 581 padded = 0; 582 while (avalue[padded] == ' ') { 583 padded++; 584 avalue_size--; 585 } 586 587 if (right_prec > 0) { 588 bufend -= right_prec; 589 memcpy(bufend, avalue + avalue_size + padded - right_prec, 590 right_prec); 591 bufend -= decimal_point_size; 592 memcpy(bufend, decimal_point, decimal_point_size); 593 avalue_size -= (right_prec + 1); 594 } 595 596 if ((*flags & NEED_GROUPING) && 597 thousands_sep_size > 0 && 598 *grouping != CHAR_MAX && 599 *grouping > 0) { 600 while (avalue_size > (int)*grouping) { 601 GRPCPY(*grouping); 602 GRPSEP; 603 grouping++; 604 605 /* no more grouping ? */ 606 if (*grouping == CHAR_MAX) 607 break; 608 609 /* rest grouping with same value ? */ 610 if (*grouping == 0) { 611 grouping--; 612 while (avalue_size > *grouping) { 613 GRPCPY(*grouping); 614 GRPSEP; 615 } 616 } 617 } 618 if (avalue_size != 0) 619 GRPCPY(avalue_size); 620 padded -= groups; 621 } else { 622 bufend -= avalue_size; 623 memcpy(bufend, avalue + padded, avalue_size); 624 /* decrease assumed $decimal_point */ 625 if (right_prec == 0) 626 padded -= decimal_point_size; 627 } 628 629 /* do padding with pad_char */ 630 if (padded > 0) { 631 bufend -= padded; 632 memset(bufend, pad_char, padded); 633 } 634 635 bufsize = rslt + bufsize - bufend; 636 memmove(rslt, bufend, bufsize); 637 free(avalue); 638 return (rslt); 639 } 640 641 ssize_t 642 strfmon(char * __restrict s, size_t maxsize, const char * __restrict format, 643 ...) 644 { 645 ssize_t ret; 646 va_list ap; 647 648 va_start(ap, format); 649 ret = vstrfmon_l(s, maxsize, __get_locale(), format, ap); 650 va_end(ap); 651 652 return (ret); 653 } 654 655 ssize_t 656 strfmon_l(char * __restrict s, size_t maxsize, locale_t loc, 657 const char * __restrict format, ...) 658 { 659 ssize_t ret; 660 va_list ap; 661 662 va_start(ap, format); 663 ret = vstrfmon_l(s, maxsize, loc, format, ap); 664 va_end(ap); 665 666 return (ret); 667 } 668