1 /* 2 * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 /* 29 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 30 * Use is subject to license terms. 31 */ 32 33 #ifndef _LCONV_C99 34 #define _LCONV_C99 35 #endif 36 37 #include "lint.h" 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 /* 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 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_sep; \ 95 groups++; \ 96 } 97 98 static void __setup_vars(int, char *, char *, char *, char **); 99 static int __calc_left_pad(int, char *); 100 static char *__format_grouped_double(double, int *, int, int, int); 101 102 ssize_t 103 strfmon(char *_RESTRICT_KYWD s, size_t maxsize, 104 const char *_RESTRICT_KYWD format, ...) 105 { 106 va_list ap; 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 char sep_by_space; 123 char sign_posn; 124 char *signstr; 125 char *currency_symbol; 126 127 char *tmpptr; /* temporary vars */ 128 int sverrno; 129 130 va_start(ap, format); 131 132 lc = localeconv(); 133 dst = s; 134 fmt = format; 135 asciivalue = NULL; 136 currency_symbol = NULL; 137 pad_size = 0; 138 139 while (*fmt) { 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 left_prec = -1; /* no left precision specified */ 158 right_prec = -1; /* no right precision specified */ 159 width = -1; /* no width specified */ 160 value = 0; /* we have no value to print now */ 161 162 /* Flags */ 163 for (;;) { 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 |= SUPRESS_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((unsigned char)*fmt)) { 197 GET_NUMBER(width); 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((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: 234 /* required char missing or 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, &sign_posn, 278 &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 && (sign_posn == 0 || 353 sign_posn == 1 || sign_posn == 2 || 354 sign_posn == 4))) 355 PRINT(space_char); 356 PRINTS(currency_symbol); /* XXX: len */ 357 if (sign_posn == 4) { 358 if (sep_by_space == 2) 359 PRINT(' '); 360 PRINTS(signstr); 361 } 362 } 363 } 364 365 if (sign_posn == 2) { 366 if (sep_by_space == 2) 367 PRINT(' '); 368 PRINTS(signstr); 369 } 370 371 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 372 PRINT(')'); 373 374 if (dst - tmpptr < width) { 375 if (flags & LEFT_JUSTIFY) { 376 while (dst - tmpptr < width) 377 PRINT(' '); 378 } else { 379 pad_size = dst-tmpptr; 380 (void) memmove(tmpptr + width-pad_size, tmpptr, 381 pad_size); 382 (void) memset(tmpptr, ' ', width-pad_size); 383 dst += width-pad_size; 384 } 385 } 386 } 387 388 PRINT('\0'); 389 va_end(ap); 390 free(asciivalue); 391 free(currency_symbol); 392 return (dst - s - 1); /* size of put data except trailing '\0' */ 393 394 e2big_error: 395 errno = E2BIG; 396 goto end_error; 397 398 format_error: 399 errno = EINVAL; 400 401 end_error: 402 sverrno = errno; 403 if (asciivalue != NULL) 404 free(asciivalue); 405 if (currency_symbol != NULL) 406 free(currency_symbol); 407 errno = sverrno; 408 va_end(ap); 409 return (-1); 410 } 411 412 static void 413 __setup_vars(int flags, char *cs_precedes, char *sep_by_space, 414 char *sign_posn, char **signstr) 415 { 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 defult 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 { 455 456 char cs_precedes, sep_by_space, sign_posn, *signstr; 457 int left_chars = 0; 458 459 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr); 460 461 if (cs_precedes != 0) { 462 left_chars += strlen(cur_symb); 463 if (sep_by_space != 0) 464 left_chars++; 465 } 466 467 switch (sign_posn) { 468 case 1: 469 left_chars += strlen(signstr); 470 break; 471 case 3: 472 case 4: 473 if (cs_precedes != 0) 474 left_chars += strlen(signstr); 475 } 476 return (left_chars); 477 } 478 479 static int 480 get_groups(int size, char *grouping) 481 { 482 483 int chars = 0; 484 485 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */ 486 return (0); 487 488 while (size > (int)*grouping) { 489 chars++; 490 size -= (int)*grouping++; 491 /* no more grouping ? */ 492 if (*grouping == CHAR_MAX) 493 break; 494 /* rest grouping with same value ? */ 495 if (*grouping == 0) { 496 chars += (size - 1) / *(grouping - 1); 497 break; 498 } 499 } 500 return (chars); 501 } 502 503 /* convert double to ASCII */ 504 static char * 505 __format_grouped_double(double value, int *flags, 506 int left_prec, int right_prec, int pad_char) 507 { 508 509 char *rslt; 510 char *avalue; 511 int avalue_size; 512 char fmt[32]; 513 514 size_t bufsize; 515 char *bufend; 516 517 int padded; 518 519 struct lconv *lc = localeconv(); 520 char *grouping; 521 char decimal_point; 522 char thousands_sep; 523 524 int groups = 0; 525 526 grouping = lc->mon_grouping; 527 decimal_point = *lc->mon_decimal_point; 528 if (decimal_point == '\0') 529 decimal_point = *lc->decimal_point; 530 thousands_sep = *lc->mon_thousands_sep; 531 if (thousands_sep == '\0') 532 thousands_sep = *lc->thousands_sep; 533 534 /* fill left_prec with default value */ 535 if (left_prec == -1) 536 left_prec = 0; 537 538 /* fill right_prec with default value */ 539 if (right_prec == -1) { 540 if (*flags & USE_INTL_CURRENCY) 541 right_prec = lc->int_frac_digits; 542 else 543 right_prec = lc->frac_digits; 544 545 if (right_prec == CHAR_MAX) /* POSIX locale ? */ 546 right_prec = 2; 547 } 548 549 if (*flags & NEED_GROUPING) 550 left_prec += get_groups(left_prec, grouping); 551 552 /* convert to string */ 553 (void) snprintf(fmt, sizeof (fmt), "%%%d.%df", 554 left_prec + right_prec + 1, right_prec); 555 avalue_size = asprintf(&avalue, fmt, value); 556 if (avalue_size < 0) 557 return (NULL); 558 559 /* make sure that we've enough space for result string */ 560 bufsize = strlen(avalue)*2+1; 561 rslt = calloc(1, bufsize); 562 if (rslt == NULL) { 563 free(avalue); 564 return (NULL); 565 } 566 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 567 568 /* skip spaces at beggining */ 569 padded = 0; 570 while (avalue[padded] == ' ') { 571 padded++; 572 avalue_size--; 573 } 574 575 if (right_prec > 0) { 576 bufend -= right_prec; 577 (void) memcpy(bufend, avalue + avalue_size+padded-right_prec, 578 right_prec); 579 *--bufend = decimal_point; 580 avalue_size -= (right_prec + 1); 581 } 582 583 if ((*flags & NEED_GROUPING) && 584 thousands_sep != '\0' && /* XXX: need investigation */ 585 *grouping != CHAR_MAX && 586 *grouping > 0) { 587 while (avalue_size > (int)*grouping) { 588 GRPCPY(*grouping); 589 GRPSEP; 590 grouping++; 591 592 /* no more grouping ? */ 593 if (*grouping == CHAR_MAX) 594 break; 595 596 /* rest grouping with same value ? */ 597 if (*grouping == 0) { 598 grouping--; 599 while (avalue_size > *grouping) { 600 GRPCPY(*grouping); 601 GRPSEP; 602 } 603 } 604 } 605 if (avalue_size != 0) 606 GRPCPY(avalue_size); 607 padded -= groups; 608 609 } else { 610 bufend -= avalue_size; 611 (void) memcpy(bufend, avalue+padded, avalue_size); 612 if (right_prec == 0) 613 padded--; /* decrease assumed $decimal_point */ 614 } 615 616 /* do padding with pad_char */ 617 if (padded > 0) { 618 bufend -= padded; 619 (void) memset(bufend, pad_char, padded); 620 } 621 622 bufsize = bufsize - (bufend - rslt) + 1; 623 (void) memmove(rslt, bufend, bufsize); 624 free(avalue); 625 return (rslt); 626 } 627