1 /* 2 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 3 * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29 #ifndef _LCONV_C99 30 #define _LCONV_C99 31 #endif 32 33 #include "lint.h" 34 #include <sys/types.h> 35 #include <ctype.h> 36 #include <errno.h> 37 #include <limits.h> 38 #include <locale.h> 39 #include <monetary.h> 40 #include <stdarg.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 /* internal flags */ 46 #define NEED_GROUPING 0x01 /* print digits grouped (default) */ 47 #define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */ 48 #define LOCALE_POSN 0x04 /* use locale defined +/- (default) */ 49 #define PARENTH_POSN 0x08 /* enclose negative amount in () */ 50 #define SUPRESS_CURR_SYMBOL 0x10 /* supress the currency from output */ 51 #define LEFT_JUSTIFY 0x20 /* left justify */ 52 #define USE_INTL_CURRENCY 0x40 /* use international currency symbol */ 53 #define IS_NEGATIVE 0x80 /* is argument value negative ? */ 54 55 /* internal macros */ 56 #define PRINT(CH) { \ 57 if (dst >= s + maxsize) \ 58 goto e2big_error; \ 59 *dst++ = CH; \ 60 } 61 62 #define PRINTS(STR) { \ 63 char *tmps = STR; \ 64 while (*tmps != '\0') \ 65 PRINT(*tmps++); \ 66 } 67 68 #define GET_NUMBER(VAR) { \ 69 VAR = 0; \ 70 while (isdigit((unsigned char)*fmt)) { \ 71 if (VAR > INT_MAX / 10) \ 72 goto e2big_error; \ 73 VAR *= 10; \ 74 VAR += *fmt - '0'; \ 75 if (VAR < 0) \ 76 goto e2big_error; \ 77 fmt++; \ 78 } \ 79 } 80 81 #define GRPCPY(howmany) { \ 82 int i = howmany; \ 83 while (i-- > 0) { \ 84 avalue_size--; \ 85 *--bufend = *(avalue+avalue_size+padded); \ 86 } \ 87 } 88 89 #define GRPSEP { \ 90 *--bufend = thousands_sep; \ 91 groups++; \ 92 } 93 94 static void __setup_vars(int, char *, char *, char *, char **); 95 static int __calc_left_pad(int, char *); 96 static char *__format_grouped_double(double, int *, int, int, int); 97 98 ssize_t 99 strfmon(char *_RESTRICT_KYWD s, size_t maxsize, 100 const char *_RESTRICT_KYWD format, ...) 101 { 102 va_list ap; 103 char *dst; /* output destination pointer */ 104 const char *fmt; /* current format poistion pointer */ 105 struct lconv *lc; /* pointer to lconv structure */ 106 char *asciivalue; /* formatted double pointer */ 107 108 int flags; /* formatting options */ 109 int pad_char; /* padding character */ 110 int pad_size; /* pad size */ 111 int width; /* field width */ 112 int left_prec; /* left precision */ 113 int right_prec; /* right precision */ 114 double value; /* just value */ 115 char space_char = ' '; /* space after currency */ 116 117 char cs_precedes; /* values gathered from struct lconv */ 118 char sep_by_space; 119 char sign_posn; 120 char *signstr; 121 char *currency_symbol; 122 123 char *tmpptr; /* temporary vars */ 124 int sverrno; 125 126 va_start(ap, format); 127 128 lc = localeconv(); 129 dst = s; 130 fmt = format; 131 asciivalue = NULL; 132 currency_symbol = NULL; 133 pad_size = 0; 134 135 while (*fmt) { 136 /* pass nonformating characters AS IS */ 137 if (*fmt != '%') 138 goto literal; 139 140 /* '%' found ! */ 141 142 /* "%%" mean just '%' */ 143 if (*(fmt+1) == '%') { 144 fmt++; 145 literal: 146 PRINT(*fmt++); 147 continue; 148 } 149 150 /* set up initial values */ 151 flags = (NEED_GROUPING|LOCALE_POSN); 152 pad_char = ' '; /* padding character is "space" */ 153 left_prec = -1; /* no left precision specified */ 154 right_prec = -1; /* no right precision specified */ 155 width = -1; /* no width specified */ 156 value = 0; /* we have no value to print now */ 157 158 /* Flags */ 159 for (;;) { 160 switch (*++fmt) { 161 case '=': /* fill character */ 162 pad_char = *++fmt; 163 if (pad_char == '\0') 164 goto format_error; 165 continue; 166 case '^': /* not group currency */ 167 flags &= ~(NEED_GROUPING); 168 continue; 169 case '+': /* use locale defined signs */ 170 if (flags & SIGN_POSN_USED) 171 goto format_error; 172 flags |= (SIGN_POSN_USED|LOCALE_POSN); 173 continue; 174 case '(': /* enclose negatives with () */ 175 if (flags & SIGN_POSN_USED) 176 goto format_error; 177 flags |= (SIGN_POSN_USED|PARENTH_POSN); 178 continue; 179 case '!': /* suppress currency symbol */ 180 flags |= SUPRESS_CURR_SYMBOL; 181 continue; 182 case '-': /* alignment (left) */ 183 flags |= LEFT_JUSTIFY; 184 continue; 185 default: 186 break; 187 } 188 break; 189 } 190 191 /* field Width */ 192 if (isdigit((unsigned char)*fmt)) { 193 GET_NUMBER(width); 194 /* 195 * Do we have enough space to put number with 196 * required width ? 197 */ 198 if ((unsigned int)width >= maxsize - (dst - s)) 199 goto e2big_error; 200 } 201 202 /* Left precision */ 203 if (*fmt == '#') { 204 if (!isdigit((unsigned char)*++fmt)) 205 goto format_error; 206 GET_NUMBER(left_prec); 207 if ((unsigned int)left_prec >= maxsize - (dst - s)) 208 goto e2big_error; 209 } 210 211 /* Right precision */ 212 if (*fmt == '.') { 213 if (!isdigit((unsigned char)*++fmt)) 214 goto format_error; 215 GET_NUMBER(right_prec); 216 if ((unsigned int)right_prec >= maxsize - (dst - s) - 217 left_prec) 218 goto e2big_error; 219 } 220 221 /* Conversion Characters */ 222 switch (*fmt++) { 223 case 'i': /* use internaltion currency format */ 224 flags |= USE_INTL_CURRENCY; 225 break; 226 case 'n': /* use national currency format */ 227 flags &= ~(USE_INTL_CURRENCY); 228 break; 229 default: 230 /* required char missing or premature EOS */ 231 goto format_error; 232 } 233 234 if (currency_symbol != NULL) 235 free(currency_symbol); 236 if (flags & USE_INTL_CURRENCY) { 237 currency_symbol = strdup(lc->int_curr_symbol); 238 if (currency_symbol != NULL) 239 space_char = *(currency_symbol+3); 240 } else 241 currency_symbol = strdup(lc->currency_symbol); 242 243 if (currency_symbol == NULL) 244 goto end_error; /* ENOMEM. */ 245 246 /* value itself */ 247 value = va_arg(ap, double); 248 249 /* detect sign */ 250 if (value < 0) { 251 flags |= IS_NEGATIVE; 252 value = -value; 253 } 254 255 /* fill left_prec with amount of padding chars */ 256 if (left_prec >= 0) { 257 pad_size = __calc_left_pad((flags ^ IS_NEGATIVE), 258 currency_symbol) - 259 __calc_left_pad(flags, currency_symbol); 260 if (pad_size < 0) 261 pad_size = 0; 262 } 263 264 if (asciivalue != NULL) 265 free(asciivalue); 266 asciivalue = __format_grouped_double(value, &flags, 267 left_prec, right_prec, pad_char); 268 if (asciivalue == NULL) 269 goto end_error; /* errno already set */ 270 /* to ENOMEM by malloc() */ 271 272 /* set some variables for later use */ 273 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, 274 &signstr); 275 276 /* 277 * Description of some LC_MONETARY's values: 278 * 279 * p_cs_precedes & n_cs_precedes 280 * 281 * = 1 - $currency_symbol precedes the value 282 * for a monetary quantity with a non-negative value 283 * = 0 - symbol succeeds the value 284 * 285 * p_sep_by_space & n_sep_by_space 286 * 287 * = 0 - no space separates $currency_symbol 288 * from the value for a monetary quantity with a 289 * non-negative value 290 * = 1 - space separates the symbol from the value 291 * = 2 - space separates the symbol and the sign string, 292 * if adjacent. 293 * 294 * p_sign_posn & n_sign_posn 295 * 296 * = 0 - parentheses enclose the quantity and the 297 * $currency_symbol 298 * = 1 - the sign string precedes the quantity and the 299 * $currency_symbol 300 * = 2 - the sign string succeeds the quantity and the 301 * $currency_symbol 302 * = 3 - the sign string precedes the $currency_symbol 303 * = 4 - the sign string succeeds the $currency_symbol 304 * 305 */ 306 307 tmpptr = dst; 308 309 while (pad_size-- > 0) 310 PRINT(' '); 311 312 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 313 PRINT('('); 314 315 if (cs_precedes == 1) { 316 if (sign_posn == 1 || sign_posn == 3) { 317 PRINTS(signstr); 318 if (sep_by_space == 2) /* XXX: ? */ 319 PRINT(' '); 320 } 321 322 if (!(flags & SUPRESS_CURR_SYMBOL)) { 323 PRINTS(currency_symbol); 324 325 if (sign_posn == 4) { 326 if (sep_by_space == 2) 327 PRINT(space_char); 328 PRINTS(signstr); 329 if (sep_by_space == 1) 330 PRINT(' '); 331 } else if (sep_by_space == 1) 332 PRINT(space_char); 333 } 334 } else if (sign_posn == 1) 335 PRINTS(signstr); 336 337 PRINTS(asciivalue); 338 339 if (cs_precedes == 0) { 340 if (sign_posn == 3) { 341 if (sep_by_space == 1) 342 PRINT(' '); 343 PRINTS(signstr); 344 } 345 346 if (!(flags & SUPRESS_CURR_SYMBOL)) { 347 if ((sign_posn == 3 && sep_by_space == 2) || 348 (sep_by_space == 1 && (sign_posn == 0 || 349 sign_posn == 1 || sign_posn == 2 || 350 sign_posn == 4))) 351 PRINT(space_char); 352 PRINTS(currency_symbol); /* XXX: len */ 353 if (sign_posn == 4) { 354 if (sep_by_space == 2) 355 PRINT(' '); 356 PRINTS(signstr); 357 } 358 } 359 } 360 361 if (sign_posn == 2) { 362 if (sep_by_space == 2) 363 PRINT(' '); 364 PRINTS(signstr); 365 } 366 367 if (sign_posn == 0 && (flags & IS_NEGATIVE)) 368 PRINT(')'); 369 370 if (dst - tmpptr < width) { 371 if (flags & LEFT_JUSTIFY) { 372 while (dst - tmpptr < width) 373 PRINT(' '); 374 } else { 375 pad_size = dst-tmpptr; 376 (void) memmove(tmpptr + width-pad_size, tmpptr, 377 pad_size); 378 (void) memset(tmpptr, ' ', width-pad_size); 379 dst += width-pad_size; 380 } 381 } 382 } 383 384 PRINT('\0'); 385 va_end(ap); 386 free(asciivalue); 387 free(currency_symbol); 388 return (dst - s - 1); /* size of put data except trailing '\0' */ 389 390 e2big_error: 391 errno = E2BIG; 392 goto end_error; 393 394 format_error: 395 errno = EINVAL; 396 397 end_error: 398 sverrno = errno; 399 if (asciivalue != NULL) 400 free(asciivalue); 401 if (currency_symbol != NULL) 402 free(currency_symbol); 403 errno = sverrno; 404 va_end(ap); 405 return (-1); 406 } 407 408 static void 409 __setup_vars(int flags, char *cs_precedes, char *sep_by_space, 410 char *sign_posn, char **signstr) 411 { 412 413 struct lconv *lc = localeconv(); 414 415 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) { 416 *cs_precedes = lc->int_n_cs_precedes; 417 *sep_by_space = lc->int_n_sep_by_space; 418 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn; 419 *signstr = (lc->negative_sign[0] == '\0') ? "-" 420 : lc->negative_sign; 421 } else if (flags & USE_INTL_CURRENCY) { 422 *cs_precedes = lc->int_p_cs_precedes; 423 *sep_by_space = lc->int_p_sep_by_space; 424 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn; 425 *signstr = lc->positive_sign; 426 } else if (flags & IS_NEGATIVE) { 427 *cs_precedes = lc->n_cs_precedes; 428 *sep_by_space = lc->n_sep_by_space; 429 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn; 430 *signstr = (lc->negative_sign[0] == '\0') ? "-" 431 : lc->negative_sign; 432 } else { 433 *cs_precedes = lc->p_cs_precedes; 434 *sep_by_space = lc->p_sep_by_space; 435 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn; 436 *signstr = lc->positive_sign; 437 } 438 439 /* Set defult values for unspecified information. */ 440 if (*cs_precedes != 0) 441 *cs_precedes = 1; 442 if (*sep_by_space == CHAR_MAX) 443 *sep_by_space = 0; 444 if (*sign_posn == CHAR_MAX) 445 *sign_posn = 0; 446 } 447 448 static int 449 __calc_left_pad(int flags, char *cur_symb) 450 { 451 452 char cs_precedes, sep_by_space, sign_posn, *signstr; 453 int left_chars = 0; 454 455 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr); 456 457 if (cs_precedes != 0) { 458 left_chars += strlen(cur_symb); 459 if (sep_by_space != 0) 460 left_chars++; 461 } 462 463 switch (sign_posn) { 464 case 1: 465 left_chars += strlen(signstr); 466 break; 467 case 3: 468 case 4: 469 if (cs_precedes != 0) 470 left_chars += strlen(signstr); 471 } 472 return (left_chars); 473 } 474 475 static int 476 get_groups(int size, char *grouping) 477 { 478 479 int chars = 0; 480 481 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */ 482 return (0); 483 484 while (size > (int)*grouping) { 485 chars++; 486 size -= (int)*grouping++; 487 /* no more grouping ? */ 488 if (*grouping == CHAR_MAX) 489 break; 490 /* rest grouping with same value ? */ 491 if (*grouping == 0) { 492 chars += (size - 1) / *(grouping - 1); 493 break; 494 } 495 } 496 return (chars); 497 } 498 499 /* convert double to ASCII */ 500 static char * 501 __format_grouped_double(double value, int *flags, 502 int left_prec, int right_prec, int pad_char) 503 { 504 505 char *rslt; 506 char *avalue; 507 int avalue_size; 508 char fmt[32]; 509 510 size_t bufsize; 511 char *bufend; 512 513 int padded; 514 515 struct lconv *lc = localeconv(); 516 char *grouping; 517 char decimal_point; 518 char thousands_sep; 519 520 int groups = 0; 521 522 grouping = lc->mon_grouping; 523 decimal_point = *lc->mon_decimal_point; 524 if (decimal_point == '\0') 525 decimal_point = *lc->decimal_point; 526 thousands_sep = *lc->mon_thousands_sep; 527 if (thousands_sep == '\0') 528 thousands_sep = *lc->thousands_sep; 529 530 /* fill left_prec with default value */ 531 if (left_prec == -1) 532 left_prec = 0; 533 534 /* fill right_prec with default value */ 535 if (right_prec == -1) { 536 if (*flags & USE_INTL_CURRENCY) 537 right_prec = lc->int_frac_digits; 538 else 539 right_prec = lc->frac_digits; 540 541 if (right_prec == CHAR_MAX) /* POSIX locale ? */ 542 right_prec = 2; 543 } 544 545 if (*flags & NEED_GROUPING) 546 left_prec += get_groups(left_prec, grouping); 547 548 /* convert to string */ 549 (void) snprintf(fmt, sizeof (fmt), "%%%d.%df", 550 left_prec + right_prec + 1, right_prec); 551 avalue_size = asprintf(&avalue, fmt, value); 552 if (avalue_size < 0) 553 return (NULL); 554 555 /* make sure that we've enough space for result string */ 556 bufsize = strlen(avalue)*2+1; 557 rslt = calloc(1, bufsize); 558 if (rslt == NULL) { 559 free(avalue); 560 return (NULL); 561 } 562 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */ 563 564 /* skip spaces at beggining */ 565 padded = 0; 566 while (avalue[padded] == ' ') { 567 padded++; 568 avalue_size--; 569 } 570 571 if (right_prec > 0) { 572 bufend -= right_prec; 573 (void) memcpy(bufend, avalue + avalue_size+padded-right_prec, 574 right_prec); 575 *--bufend = decimal_point; 576 avalue_size -= (right_prec + 1); 577 } 578 579 if ((*flags & NEED_GROUPING) && 580 thousands_sep != '\0' && /* XXX: need investigation */ 581 *grouping != CHAR_MAX && 582 *grouping > 0) { 583 while (avalue_size > (int)*grouping) { 584 GRPCPY(*grouping); 585 GRPSEP; 586 grouping++; 587 588 /* no more grouping ? */ 589 if (*grouping == CHAR_MAX) 590 break; 591 592 /* rest grouping with same value ? */ 593 if (*grouping == 0) { 594 grouping--; 595 while (avalue_size > *grouping) { 596 GRPCPY(*grouping); 597 GRPSEP; 598 } 599 } 600 } 601 if (avalue_size != 0) 602 GRPCPY(avalue_size); 603 padded -= groups; 604 605 } else { 606 bufend -= avalue_size; 607 (void) memcpy(bufend, avalue+padded, avalue_size); 608 if (right_prec == 0) 609 padded--; /* decrease assumed $decimal_point */ 610 } 611 612 /* do padding with pad_char */ 613 if (padded > 0) { 614 bufend -= padded; 615 (void) memset(bufend, pad_char, padded); 616 } 617 618 bufsize = bufsize - (bufend - rslt) + 1; 619 (void) memmove(rslt, bufend, bufsize); 620 free(avalue); 621 return (rslt); 622 } 623