1 /* 2 * Copyright 2013 Garrett D'Amore <garrett@damore.org> 3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 4 * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #ifndef _LCONV_C99 31 #define _LCONV_C99 32 #endif 33 34 #include "lint.h" 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 #include "localeimpl.h" 46 #include "lmonetary.h" 47 #include "lnumeric.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 SUPRESS_CURR_SYMBOL 0x10 /* supress 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) { \ 61 if (dst >= s + maxsize) \ 62 goto e2big_error; \ 63 *dst++ = CH; \ 64 } 65 66 #define PRINTS(STR) { \ 67 const char *tmps = STR; \ 68 while (*tmps != '\0') \ 69 PRINT(*tmps++); \ 70 } 71 72 #define GET_NUMBER(VAR) { \ 73 VAR = 0; \ 74 while (isdigit((unsigned char)*fmt)) { \ 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 } 84 85 #define GRPCPY(howmany) { \ 86 int i = howmany; \ 87 while (i-- > 0) { \ 88 avalue_size--; \ 89 *--bufend = *(avalue+avalue_size+padded); \ 90 } \ 91 } 92 93 #define GRPSEP { \ 94 bufend -= thousands_len; \ 95 (void) memcpy(bufend, thousands_sep, thousands_len); \ 96 groups++; \ 97 } 98 99 static void setup_vars(const struct lc_monetary *, int, char *, char *, char *, 100 const char **); 101 static int calc_left_pad(const struct lc_monetary *, int, const char *); 102 static char *format_grouped_double(const struct lc_monetary *, 103 const struct lc_numeric *, double, int *, int, int, int); 104 105 ssize_t 106 strfmon_impl(char *_RESTRICT_KYWD s, size_t maxsize, locale_t loc, 107 const char *_RESTRICT_KYWD format, va_list ap) 108 { 109 char *dst; /* output destination pointer */ 110 const char *fmt; /* current format poistion pointer */ 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 from struct lc_monetary */ 123 char sep_by_space; 124 char sign_posn; 125 const char *signstr; 126 const char *currency_symbol; 127 128 char *tmpptr; /* temporary vars */ 129 int sverrno; 130 const struct lc_monetary *lmon; /* monetary structure */ 131 const struct lc_numeric *lnum; /* numeric structure */ 132 133 lmon = loc->monetary; 134 lnum = loc->numeric; 135 136 dst = s; 137 fmt = format; 138 asciivalue = NULL; 139 currency_symbol = NULL; 140 pad_size = 0; 141 142 while (*fmt) { 143 /* pass nonformating characters AS IS */ 144 if (*fmt != '%') 145 goto literal; 146 147 /* '%' found ! */ 148 149 /* "%%" mean just '%' */ 150 if (*(fmt+1) == '%') { 151 fmt++; 152 literal: 153 PRINT(*fmt++); 154 continue; 155 } 156 157 /* set up initial values */ 158 flags = (NEED_GROUPING|LOCALE_POSN); 159 pad_char = ' '; /* padding character is "space" */ 160 left_prec = -1; /* no left precision specified */ 161 right_prec = -1; /* no right precision specified */ 162 width = -1; /* no width specified */ 163 value = 0; /* we have no value to print now */ 164 165 /* Flags */ 166 for (;;) { 167 switch (*++fmt) { 168 case '=': /* fill character */ 169 pad_char = *++fmt; 170 if (pad_char == '\0') 171 goto format_error; 172 continue; 173 case '^': /* not group currency */ 174 flags &= ~(NEED_GROUPING); 175 continue; 176 case '+': /* use locale defined signs */ 177 if (flags & SIGN_POSN_USED) 178 goto format_error; 179 flags |= (SIGN_POSN_USED|LOCALE_POSN); 180 continue; 181 case '(': /* enclose negatives with () */ 182 if (flags & SIGN_POSN_USED) 183 goto format_error; 184 flags |= (SIGN_POSN_USED|PARENTH_POSN); 185 continue; 186 case '!': /* suppress currency symbol */ 187 flags |= SUPRESS_CURR_SYMBOL; 188 continue; 189 case '-': /* alignment (left) */ 190 flags |= LEFT_JUSTIFY; 191 continue; 192 default: 193 break; 194 } 195 break; 196 } 197 198 /* field Width */ 199 if (isdigit((unsigned char)*fmt)) { 200 GET_NUMBER(width); 201 /* 202 * Do we have enough space to put number with 203 * required width ? 204 */ 205 if ((unsigned int)width >= maxsize - (dst - s)) 206 goto e2big_error; 207 } 208 209 /* Left precision */ 210 if (*fmt == '#') { 211 if (!isdigit((unsigned char)*++fmt)) 212 goto format_error; 213 GET_NUMBER(left_prec); 214 if ((unsigned int)left_prec >= maxsize - (dst - s)) 215 goto e2big_error; 216 } 217 218 /* Right precision */ 219 if (*fmt == '.') { 220 if (!isdigit((unsigned char)*++fmt)) 221 goto format_error; 222 GET_NUMBER(right_prec); 223 if ((unsigned int)right_prec >= maxsize - (dst - s) - 224 left_prec) 225 goto e2big_error; 226 } 227 228 /* Conversion Characters */ 229 switch (*fmt++) { 230 case 'i': /* use internaltion currency format */ 231 flags |= USE_INTL_CURRENCY; 232 break; 233 case 'n': /* use national currency format */ 234 flags &= ~(USE_INTL_CURRENCY); 235 break; 236 default: 237 /* required char missing or premature EOS */ 238 goto format_error; 239 } 240 241 if (flags & USE_INTL_CURRENCY) { 242 currency_symbol = lmon->int_curr_symbol; 243 /* by definition three letters followed by a space */ 244 if (currency_symbol != NULL) 245 space_char = currency_symbol[3]; 246 } else 247 currency_symbol = lmon->currency_symbol; 248 249 /* value itself */ 250 value = va_arg(ap, double); 251 252 /* detect sign */ 253 if (value < 0) { 254 flags |= IS_NEGATIVE; 255 value = -value; 256 } 257 258 /* fill left_prec with amount of padding chars */ 259 if (left_prec >= 0) { 260 pad_size = calc_left_pad(lmon, (flags ^ IS_NEGATIVE), 261 currency_symbol) - 262 calc_left_pad(lmon, flags, currency_symbol); 263 if (pad_size < 0) 264 pad_size = 0; 265 } 266 267 if (asciivalue != NULL) 268 free(asciivalue); 269 asciivalue = format_grouped_double(lmon, lnum, value, &flags, 270 left_prec, right_prec, pad_char); 271 if (asciivalue == NULL) 272 goto end_error; /* errno already set */ 273 /* to ENOMEM by malloc() */ 274 275 /* set some variables for later use */ 276 setup_vars(lmon, flags, &cs_precedes, &sep_by_space, 277 &sign_posn, &signstr); 278 279 /* 280 * Description of some LC_MONETARY's values: 281 * 282 * p_cs_precedes & n_cs_precedes 283 * 284 * = 1 - $currency_symbol precedes the value 285 * for a monetary quantity with a non-negative value 286 * = 0 - symbol succeeds the value 287 * 288 * p_sep_by_space & n_sep_by_space 289 * 290 * = 0 - no space separates $currency_symbol 291 * from the value for a monetary quantity with a 292 * non-negative value 293 * = 1 - space separates the symbol from the value 294 * = 2 - space separates the symbol and the sign string, 295 * if adjacent. 296 * 297 * p_sign_posn & n_sign_posn 298 * 299 * = 0 - parentheses enclose the quantity and the 300 * $currency_symbol 301 * = 1 - the sign string precedes the quantity and the 302 * $currency_symbol 303 * = 2 - the sign string succeeds the quantity and the 304 * $currency_symbol 305 * = 3 - the sign string precedes the $currency_symbol 306 * = 4 - the sign string succeeds the $currency_symbol 307 * 308 */ 309 310 tmpptr = dst; 311 312 while (pad_size-- > 0) 313 PRINT(' '); 314 315 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 316 PRINT('('); 317 318 if (cs_precedes == 1) { 319 if (sign_posn == 1 || sign_posn == 3) { 320 PRINTS(signstr); 321 if (sep_by_space == 2) 322 PRINT(' '); 323 } 324 325 if (!(flags & SUPRESS_CURR_SYMBOL)) { 326 PRINTS(currency_symbol); 327 328 if (sign_posn == 4) { 329 if (sep_by_space == 2) 330 PRINT(space_char); 331 PRINTS(signstr); 332 if (sep_by_space == 1) 333 PRINT(' '); 334 } else if (sep_by_space == 1) 335 PRINT(space_char); 336 } 337 } else if (sign_posn == 1) 338 PRINTS(signstr); 339 340 PRINTS(asciivalue); 341 342 if (cs_precedes == 0) { 343 if (sign_posn == 3) { 344 if (sep_by_space == 1) 345 PRINT(' '); 346 PRINTS(signstr); 347 } 348 349 if (!(flags & SUPRESS_CURR_SYMBOL)) { 350 if ((sign_posn == 3 && sep_by_space == 2) || 351 (sep_by_space == 1 && (sign_posn == 0 || 352 sign_posn == 1 || sign_posn == 2 || 353 sign_posn == 4))) 354 PRINT(space_char); 355 PRINTS(currency_symbol); /* XXX: len */ 356 if (sign_posn == 4) { 357 if (sep_by_space == 2) 358 PRINT(' '); 359 PRINTS(signstr); 360 } 361 } 362 } 363 364 if (sign_posn == 2) { 365 if (sep_by_space == 2) 366 PRINT(' '); 367 PRINTS(signstr); 368 } 369 370 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 371 PRINT(')'); 372 373 if (dst - tmpptr < width) { 374 if (flags & LEFT_JUSTIFY) { 375 while (dst - tmpptr < width) 376 PRINT(' '); 377 } else { 378 pad_size = dst-tmpptr; 379 (void) memmove(tmpptr + width-pad_size, tmpptr, 380 pad_size); 381 (void) memset(tmpptr, ' ', width-pad_size); 382 dst += width-pad_size; 383 } 384 } 385 } 386 387 PRINT('\0'); 388 free(asciivalue); 389 return (dst - s - 1); /* size of put data except trailing '\0' */ 390 391 e2big_error: 392 errno = E2BIG; 393 goto end_error; 394 395 format_error: 396 errno = EINVAL; 397 398 end_error: 399 sverrno = errno; 400 if (asciivalue != NULL) 401 free(asciivalue); 402 errno = sverrno; 403 return (-1); 404 } 405 406 ssize_t 407 strfmon(char *_RESTRICT_KYWD s, size_t maxsize, 408 const char *_RESTRICT_KYWD format, ...) 409 { 410 va_list ap; 411 ssize_t ret; 412 413 va_start(ap, format); 414 ret = strfmon_impl(s, maxsize, uselocale(NULL), format, ap); 415 va_end(ap); 416 return (ret); 417 } 418 419 ssize_t 420 strfmon_l(char *_RESTRICT_KYWD s, size_t maxsize, locale_t loc, 421 const char *_RESTRICT_KYWD format, ...) 422 { 423 ssize_t ret; 424 va_list ap; 425 va_start(ap, format); 426 ret = strfmon_impl(s, maxsize, loc, format, ap); 427 va_end(ap); 428 return (ret); 429 } 430 431 static void 432 setup_vars(const struct lc_monetary *lmon, int flags, char *cs_precedes, 433 char *sep_by_space, char *sign_posn, const char **signstr) 434 { 435 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) { 436 *cs_precedes = lmon->int_n_cs_precedes[0]; 437 *sep_by_space = lmon->int_n_sep_by_space[0]; 438 *sign_posn = (flags & PARENTH_POSN) ? 0 : 439 lmon->int_n_sign_posn[0]; 440 *signstr = (lmon->negative_sign[0] == '\0') ? "-" : 441 lmon->negative_sign; 442 } else if (flags & USE_INTL_CURRENCY) { 443 *cs_precedes = lmon->int_p_cs_precedes[0]; 444 *sep_by_space = lmon->int_p_sep_by_space[0]; 445 *sign_posn = (flags & PARENTH_POSN) ? 0 : 446 lmon->int_p_sign_posn[0]; 447 *signstr = lmon->positive_sign; 448 } else if (flags & IS_NEGATIVE) { 449 *cs_precedes = lmon->n_cs_precedes[0]; 450 *sep_by_space = lmon->n_sep_by_space[0]; 451 *sign_posn = (flags & PARENTH_POSN) ? 0 : lmon->n_sign_posn[0]; 452 *signstr = (lmon->negative_sign[0] == '\0') ? "-" : 453 lmon->negative_sign; 454 } else { 455 *cs_precedes = lmon->p_cs_precedes[0]; 456 *sep_by_space = lmon->p_sep_by_space[0]; 457 *sign_posn = (flags & PARENTH_POSN) ? 0 : lmon->p_sign_posn[0]; 458 *signstr = lmon->positive_sign; 459 } 460 461 /* Set default values for unspecified information. */ 462 if (*cs_precedes != 0) 463 *cs_precedes = 1; 464 if (*sep_by_space == CHAR_MAX) 465 *sep_by_space = 0; 466 if (*sign_posn == CHAR_MAX) 467 *sign_posn = 0; 468 } 469 470 static int 471 calc_left_pad(const struct lc_monetary *lmon, int flags, const char *cur_symb) 472 { 473 char cs_precedes, sep_by_space, sign_posn; 474 const char *signstr; 475 int left_chars = 0; 476 477 setup_vars(lmon, flags, &cs_precedes, &sep_by_space, &sign_posn, 478 &signstr); 479 480 if (cs_precedes != 0) { 481 left_chars += strlen(cur_symb); 482 if (sep_by_space != 0) 483 left_chars++; 484 } 485 486 switch (sign_posn) { 487 case 1: 488 left_chars += strlen(signstr); 489 break; 490 case 3: 491 case 4: 492 if (cs_precedes != 0) 493 left_chars += strlen(signstr); 494 } 495 return (left_chars); 496 } 497 498 static int 499 get_groups(int size, const char *grouping) 500 { 501 502 int chars = 0; 503 504 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */ 505 return (0); 506 507 while (size > (int)*grouping) { 508 chars++; 509 size -= (int)*grouping++; 510 /* no more grouping ? */ 511 if (*grouping == CHAR_MAX) 512 break; 513 /* rest grouping with same value ? */ 514 if (*grouping == 0) { 515 chars += (size - 1) / *(grouping - 1); 516 break; 517 } 518 } 519 return (chars); 520 } 521 522 /* convert double to ASCII */ 523 static char * 524 format_grouped_double(const struct lc_monetary *lmon, 525 const struct lc_numeric *lnum, 526 double value, int *flags, int left_prec, int right_prec, int pad_char) 527 { 528 529 char *rslt; 530 char *avalue; 531 int avalue_size; 532 char fmt[32]; 533 534 size_t bufsize; 535 char *bufend; 536 537 int padded; 538 539 const char *grouping; 540 const char *decimal_point; 541 const char *thousands_sep; 542 int decimal_len; 543 int thousands_len; 544 545 int groups = 0; 546 547 grouping = lmon->mon_grouping; 548 decimal_point = lmon->mon_decimal_point; 549 if (*decimal_point == '\0') 550 decimal_point = lnum->decimal_point; 551 thousands_sep = lmon->mon_thousands_sep; 552 if (*thousands_sep == '\0') 553 thousands_sep = lnum->thousands_sep; 554 555 decimal_len = strlen(decimal_point); /* usually 1 */ 556 thousands_len = strlen(thousands_sep); /* 0 or 1 usually */ 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 = lmon->int_frac_digits[0]; 566 else 567 right_prec = lmon->frac_digits[0]; 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 (void) snprintf(fmt, sizeof (fmt), "%%%d.%df", 578 left_prec + right_prec + 1, right_prec); 579 avalue_size = asprintf(&avalue, fmt, value); 580 if (avalue_size < 0) 581 return (NULL); 582 583 /* 584 * Make sure that we've enough space for result string. 585 * This assumes that digits take up at least much space as 586 * grouping and radix characters. The worst case currently known 587 * is for Arabic, where two-byte UTF-8 sequences are used for both 588 * decimal and thousands seperators, and groups can be a small as two 589 * decimal digits. This will do no worse than doubling the storage 590 * requirement. 591 */ 592 bufsize = strlen(avalue)*2+1; 593 rslt = calloc(1, bufsize); 594 if (rslt == NULL) { 595 free(avalue); 596 return (NULL); 597 } 598 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 599 600 /* skip spaces at beginning */ 601 padded = 0; 602 while (avalue[padded] == ' ') { 603 padded++; 604 avalue_size--; 605 } 606 607 if (right_prec > 0) { 608 bufend -= right_prec; 609 (void) memcpy(bufend, avalue + avalue_size+padded-right_prec, 610 right_prec); 611 bufend -= decimal_len; 612 (void) memcpy(bufend, decimal_point, decimal_len); 613 avalue_size -= (right_prec + decimal_len); 614 } 615 616 if ((*flags & NEED_GROUPING) && 617 thousands_len != 0 && 618 *grouping != CHAR_MAX && 619 *grouping > 0) { 620 while (avalue_size > (int)*grouping) { 621 GRPCPY(*grouping); 622 GRPSEP; 623 grouping++; 624 625 /* no more grouping ? */ 626 if (*grouping == CHAR_MAX) 627 break; 628 629 /* rest grouping with same value ? */ 630 if (*grouping == 0) { 631 grouping--; 632 while (avalue_size > *grouping) { 633 GRPCPY(*grouping); 634 GRPSEP; 635 } 636 } 637 } 638 if (avalue_size != 0) 639 GRPCPY(avalue_size); 640 padded -= groups; 641 642 } else { 643 bufend -= avalue_size; 644 (void) memcpy(bufend, avalue+padded, avalue_size); 645 if (right_prec == 0) 646 padded--; /* decrease assumed $decimal_point */ 647 } 648 649 /* do padding with pad_char */ 650 if (padded > 0) { 651 bufend -= padded; 652 (void) memset(bufend, pad_char, padded); 653 } 654 655 bufsize = bufsize - (bufend - rslt) + 1; 656 (void) memmove(rslt, bufend, bufsize); 657 free(avalue); 658 return (rslt); 659 } 660