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 37 #include <ctype.h> 38 #include <errno.h> 39 #include <limits.h> 40 #include <locale.h> 41 #include <monetary.h> 42 #include <stdarg.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #include "xlocale_private.h" 48 49 /* internal flags */ 50 #define NEED_GROUPING 0x01 /* print digits grouped (default) */ 51 #define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */ 52 #define LOCALE_POSN 0x04 /* use locale defined +/- (default) */ 53 #define PARENTH_POSN 0x08 /* enclose negative amount in () */ 54 #define SUPPRESS_CURR_SYMBOL 0x10 /* suppress the currency from output */ 55 #define LEFT_JUSTIFY 0x20 /* left justify */ 56 #define USE_INTL_CURRENCY 0x40 /* use international currency symbol */ 57 #define IS_NEGATIVE 0x80 /* is argument value negative ? */ 58 59 /* internal macros */ 60 #define PRINT(CH) do { \ 61 if (dst >= s + maxsize) \ 62 goto e2big_error; \ 63 *dst++ = CH; \ 64 } while (0) 65 66 #define PRINTS(STR) do { \ 67 char *tmps = STR; \ 68 while (*tmps != '\0') \ 69 PRINT(*tmps++); \ 70 } while (0) 71 72 #define GET_NUMBER(VAR, LOC) do { \ 73 VAR = 0; \ 74 while (isdigit_l((unsigned char)*fmt, LOC)) { \ 75 if (VAR > INT_MAX / 10) \ 76 goto e2big_error; \ 77 VAR *= 10; \ 78 VAR += *fmt - '0'; \ 79 if (VAR < 0) \ 80 goto e2big_error; \ 81 fmt++; \ 82 } \ 83 } while (0) 84 85 #define GRPCPY(howmany) do { \ 86 int i = howmany; \ 87 while (i-- > 0) { \ 88 avalue_size--; \ 89 *--bufend = *(avalue + avalue_size + padded); \ 90 } \ 91 } while (0) 92 93 #define GRPSEP do { \ 94 bufend -= thousands_sep_size; \ 95 memcpy(bufend, thousands_sep, thousands_sep_size); \ 96 groups++; \ 97 } while (0) 98 99 static void __setup_vars(int, char *, char *, char *, char **, struct lconv *); 100 static int __calc_left_pad(int, char *, struct lconv *); 101 static char *__format_grouped_double(double, int *, int, int, int, 102 struct lconv *, locale_t); 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; 130 131 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 != 0) { 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 */ 161 162 /* Flags */ 163 while (1) { 164 switch (*++fmt) { 165 case '=': /* fill character */ 166 pad_char = *++fmt; 167 if (pad_char == '\0') 168 goto format_error; 169 continue; 170 case '^': /* not group currency */ 171 flags &= ~(NEED_GROUPING); 172 continue; 173 case '+': /* use locale defined signs */ 174 if (flags & SIGN_POSN_USED) 175 goto format_error; 176 flags |= (SIGN_POSN_USED | LOCALE_POSN); 177 continue; 178 case '(': /* enclose negatives with () */ 179 if (flags & SIGN_POSN_USED) 180 goto format_error; 181 flags |= (SIGN_POSN_USED | PARENTH_POSN); 182 continue; 183 case '!': /* suppress currency symbol */ 184 flags |= SUPPRESS_CURR_SYMBOL; 185 continue; 186 case '-': /* alignment (left) */ 187 flags |= LEFT_JUSTIFY; 188 continue; 189 default: 190 break; 191 } 192 break; 193 } 194 195 /* field Width */ 196 if (isdigit_l((unsigned char)*fmt, loc)) { 197 GET_NUMBER(width, loc); 198 /* 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_l((unsigned char)*++fmt, loc)) 209 goto format_error; 210 GET_NUMBER(left_prec, loc); 211 if ((unsigned int)left_prec >= maxsize - (dst - s)) 212 goto e2big_error; 213 } 214 215 /* Right precision */ 216 if (*fmt == '.') { 217 if (!isdigit_l((unsigned char)*++fmt, loc)) 218 goto format_error; 219 GET_NUMBER(right_prec, loc); 220 if ((unsigned int)right_prec >= 221 maxsize - (dst - s) - 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: /* 234 * required character is missing or 235 * premature EOS 236 */ 237 goto format_error; 238 } 239 240 if (currency_symbol != NULL) 241 free(currency_symbol); 242 if (flags & USE_INTL_CURRENCY) { 243 currency_symbol = strdup(lc->int_curr_symbol); 244 if (currency_symbol != NULL && 245 strlen(currency_symbol) > 3) { 246 space_char = currency_symbol[3]; 247 currency_symbol[3] = '\0'; 248 } 249 } else 250 currency_symbol = strdup(lc->currency_symbol); 251 252 if (currency_symbol == NULL) 253 goto end_error; /* ENOMEM. */ 254 255 /* value itself */ 256 value = va_arg(ap, double); 257 258 /* detect sign */ 259 if (value < 0) { 260 flags |= IS_NEGATIVE; 261 value = -value; 262 } 263 264 /* fill left_prec with amount of padding chars */ 265 if (left_prec >= 0) { 266 pad_size = __calc_left_pad((flags ^ IS_NEGATIVE), 267 currency_symbol, lc) - 268 __calc_left_pad(flags, currency_symbol, lc); 269 if (pad_size < 0) 270 pad_size = 0; 271 } 272 273 if (asciivalue != NULL) 274 free(asciivalue); 275 asciivalue = __format_grouped_double(value, &flags, left_prec, 276 right_prec, pad_char, lc, loc); 277 if (asciivalue == NULL) 278 goto end_error; /* 279 * errno already set to ENOMEM by 280 * malloc() 281 */ 282 283 /* set some variables for later use */ 284 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, 285 &signstr, lc); 286 287 /* 288 * Description of some LC_MONETARY's values: 289 * 290 * p_cs_precedes & n_cs_precedes 291 * 292 * = 1 - $currency_symbol precedes the value 293 * for a monetary quantity with a non-negative value 294 * = 0 - symbol succeeds the value 295 * 296 * p_sep_by_space & n_sep_by_space 297 * 298 * = 0 - no space separates $currency_symbol 299 * from the value for a monetary quantity with a 300 * non-negative value 301 * = 1 - space separates the symbol from the value 302 * = 2 - space separates the symbol and the sign string, 303 * if adjacent; otherwise, a space separates 304 * the sign string from the value 305 * 306 * p_sign_posn & n_sign_posn 307 * 308 * = 0 - parentheses enclose the quantity and the 309 * $currency_symbol 310 * = 1 - the sign string precedes the quantity and the 311 * $currency_symbol 312 * = 2 - the sign string succeeds the quantity and the 313 * $currency_symbol 314 * = 3 - the sign string precedes the $currency_symbol 315 * = 4 - the sign string succeeds the $currency_symbol 316 */ 317 318 tmpptr = dst; 319 320 while (pad_size-- > 0) 321 PRINT(' '); 322 323 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 324 PRINT('('); 325 326 if (cs_precedes == 1) { 327 if (sign_posn == 1 || sign_posn == 3) { 328 PRINTS(signstr); 329 if (sep_by_space == 2) 330 PRINT(' '); 331 } 332 333 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 334 PRINTS(currency_symbol); 335 336 if (sign_posn == 4) { 337 if (sep_by_space == 2) 338 PRINT(space_char); 339 PRINTS(signstr); 340 if (sep_by_space == 1) 341 PRINT(' '); 342 } else if (sep_by_space == 1) 343 PRINT(space_char); 344 } 345 } else if (sign_posn == 1) { 346 PRINTS(signstr); 347 if (sep_by_space == 2) 348 PRINT(' '); 349 } 350 351 PRINTS(asciivalue); 352 353 if (cs_precedes == 0) { 354 if (sign_posn == 3) { 355 if (sep_by_space == 1) 356 PRINT(' '); 357 PRINTS(signstr); 358 } 359 360 if (!(flags & SUPPRESS_CURR_SYMBOL)) { 361 if ((sign_posn == 3 && sep_by_space == 2) || 362 (sep_by_space == 1 && 363 (sign_posn == 0 || sign_posn == 1 || 364 sign_posn == 2 || sign_posn == 4))) 365 PRINT(space_char); 366 PRINTS(currency_symbol); 367 if (sign_posn == 4) { 368 if (sep_by_space == 2) 369 PRINT(' '); 370 PRINTS(signstr); 371 } 372 } 373 } 374 375 if (sign_posn == 2) { 376 if (sep_by_space == 2) 377 PRINT(' '); 378 PRINTS(signstr); 379 } 380 381 if (sign_posn == 0) { 382 if (flags & IS_NEGATIVE) 383 PRINT(')'); 384 else if (left_prec >= 0) 385 PRINT(' '); 386 } 387 388 if (dst - tmpptr < width) { 389 if (flags & LEFT_JUSTIFY) { 390 while (dst - tmpptr < width) 391 PRINT(' '); 392 } else { 393 pad_size = dst - tmpptr; 394 memmove(tmpptr + width - pad_size, tmpptr, 395 pad_size); 396 memset(tmpptr, ' ', width - pad_size); 397 dst += width - pad_size; 398 } 399 } 400 } 401 402 PRINT('\0'); 403 free(asciivalue); 404 free(currency_symbol); 405 return (dst - s - 1); /* size of put data except trailing '\0' */ 406 407 e2big_error: 408 errno = E2BIG; 409 goto end_error; 410 411 format_error: 412 errno = EINVAL; 413 414 end_error: 415 sverrno = errno; 416 if (asciivalue != NULL) 417 free(asciivalue); 418 if (currency_symbol != NULL) 419 free(currency_symbol); 420 errno = sverrno; 421 return (-1); 422 } 423 424 static void 425 __setup_vars(int flags, char *cs_precedes, char *sep_by_space, char *sign_posn, 426 char **signstr, struct lconv *lc) 427 { 428 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) { 429 *cs_precedes = lc->int_n_cs_precedes; 430 *sep_by_space = lc->int_n_sep_by_space; 431 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn; 432 *signstr = (lc->negative_sign[0] == '\0') ? "-" : 433 lc->negative_sign; 434 } else if (flags & USE_INTL_CURRENCY) { 435 *cs_precedes = lc->int_p_cs_precedes; 436 *sep_by_space = lc->int_p_sep_by_space; 437 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn; 438 *signstr = lc->positive_sign; 439 } else if (flags & IS_NEGATIVE) { 440 *cs_precedes = lc->n_cs_precedes; 441 *sep_by_space = lc->n_sep_by_space; 442 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn; 443 *signstr = (lc->negative_sign[0] == '\0') ? "-" : 444 lc->negative_sign; 445 } else { 446 *cs_precedes = lc->p_cs_precedes; 447 *sep_by_space = lc->p_sep_by_space; 448 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn; 449 *signstr = lc->positive_sign; 450 } 451 452 /* Set default values for unspecified information. */ 453 if (*cs_precedes != 0) 454 *cs_precedes = 1; 455 if (*sep_by_space == CHAR_MAX) 456 *sep_by_space = 0; 457 if (*sign_posn == CHAR_MAX) 458 *sign_posn = 0; 459 } 460 461 static int 462 __calc_left_pad(int flags, char *cur_symb, struct lconv *lc) 463 { 464 char cs_precedes, sep_by_space, sign_posn, *signstr; 465 int left_chars = 0; 466 467 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr, 468 lc); 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, int left_prec, int right_prec, 518 int pad_char, struct lconv *lc, locale_t loc) 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 char *grouping; 531 const char *decimal_point; 532 const char *thousands_sep; 533 size_t decimal_point_size; 534 size_t thousands_sep_size; 535 536 int groups = 0; 537 538 grouping = lc->mon_grouping; 539 decimal_point = lc->mon_decimal_point; 540 if (*decimal_point == '\0') 541 decimal_point = lc->decimal_point; 542 thousands_sep = lc->mon_thousands_sep; 543 if (*thousands_sep == '\0') 544 thousands_sep = lc->thousands_sep; 545 546 decimal_point_size = strlen(decimal_point); 547 thousands_sep_size = strlen(thousands_sep); 548 549 /* fill left_prec with default value */ 550 if (left_prec == -1) 551 left_prec = 0; 552 553 /* fill right_prec with default value */ 554 if (right_prec == -1) { 555 if (*flags & USE_INTL_CURRENCY) 556 right_prec = lc->int_frac_digits; 557 else 558 right_prec = lc->frac_digits; 559 560 if (right_prec == CHAR_MAX) /* POSIX locale ? */ 561 right_prec = 2; 562 } 563 564 if (*flags & NEED_GROUPING) 565 left_prec += get_groups(left_prec, grouping); 566 567 /* convert to string */ 568 avalue_size = asprintf_l(&avalue, loc, "%*.*f", 569 left_prec + right_prec + 1, right_prec, value); 570 if (avalue_size < 0) 571 return (NULL); 572 573 /* make sure that we've enough space for result string */ 574 bufsize = avalue_size * (1 + thousands_sep_size) + decimal_point_size + 575 1; 576 rslt = calloc(1, bufsize); 577 if (rslt == NULL) { 578 free(avalue); 579 return (NULL); 580 } 581 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 582 583 /* skip spaces at beginning */ 584 padded = 0; 585 while (avalue[padded] == ' ') { 586 padded++; 587 avalue_size--; 588 } 589 590 if (right_prec > 0) { 591 bufend -= right_prec; 592 memcpy(bufend, avalue + avalue_size + padded - right_prec, 593 right_prec); 594 bufend -= decimal_point_size; 595 memcpy(bufend, decimal_point, decimal_point_size); 596 avalue_size -= (right_prec + 1); 597 } 598 599 if ((*flags & NEED_GROUPING) && thousands_sep_size > 0 && 600 *grouping != CHAR_MAX && *grouping > 0) { 601 while (avalue_size > (int)*grouping) { 602 GRPCPY(*grouping); 603 GRPSEP; 604 grouping++; 605 606 /* no more grouping ? */ 607 if (*grouping == CHAR_MAX) 608 break; 609 610 /* rest grouping with same value ? */ 611 if (*grouping == 0) { 612 grouping--; 613 while (avalue_size > *grouping) { 614 GRPCPY(*grouping); 615 GRPSEP; 616 } 617 } 618 } 619 if (avalue_size != 0) 620 GRPCPY(avalue_size); 621 padded -= groups; 622 } else { 623 bufend -= avalue_size; 624 memcpy(bufend, avalue + padded, avalue_size); 625 /* decrease assumed $decimal_point */ 626 if (right_prec == 0) 627 padded -= decimal_point_size; 628 } 629 630 /* do padding with pad_char */ 631 if (padded > 0) { 632 bufend -= padded; 633 memset(bufend, pad_char, padded); 634 } 635 636 bufsize = rslt + bufsize - bufend; 637 memmove(rslt, bufend, bufsize); 638 free(avalue); 639 return (rslt); 640 } 641 642 ssize_t 643 strfmon(char *restrict s, size_t maxsize, const char *restrict format, ...) 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