1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 Alexey Zelkin <[email protected]>
5 * All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 * All rights reserved.
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/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
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 #include "xlocale_private.h"
49
50 /* internal flags */
51 #define NEED_GROUPING 0x01 /* print digits grouped (default) */
52 #define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */
53 #define LOCALE_POSN 0x04 /* use locale defined +/- (default) */
54 #define PARENTH_POSN 0x08 /* enclose negative amount in () */
55 #define SUPRESS_CURR_SYMBOL 0x10 /* suppress the currency from output */
56 #define LEFT_JUSTIFY 0x20 /* left justify */
57 #define USE_INTL_CURRENCY 0x40 /* use international currency symbol */
58 #define IS_NEGATIVE 0x80 /* is argument value negative ? */
59
60 /* internal macros */
61 #define PRINT(CH) do { \
62 if (dst >= s + maxsize) \
63 goto e2big_error; \
64 *dst++ = CH; \
65 } while (0)
66
67 #define PRINTS(STR) do { \
68 char *tmps = STR; \
69 while (*tmps != '\0') \
70 PRINT(*tmps++); \
71 } while (0)
72
73 #define GET_NUMBER(VAR) do { \
74 VAR = 0; \
75 while (isdigit((unsigned char)*fmt)) { \
76 if (VAR > INT_MAX / 10) \
77 goto e2big_error; \
78 VAR *= 10; \
79 VAR += *fmt - '0'; \
80 if (VAR < 0) \
81 goto e2big_error; \
82 fmt++; \
83 } \
84 } while (0)
85
86 #define GRPCPY(howmany) do { \
87 int i = howmany; \
88 while (i-- > 0) { \
89 avalue_size--; \
90 *--bufend = *(avalue+avalue_size+padded); \
91 } \
92 } while (0)
93
94 #define GRPSEP do { \
95 *--bufend = thousands_sep; \
96 groups++; \
97 } while (0)
98
99 static void __setup_vars(int, char *, char *, char *, char **);
100 static int __calc_left_pad(int, char *);
101 static char *__format_grouped_double(double, int *, int, int, int);
102
103 static ssize_t
vstrfmon_l(char * __restrict s,size_t maxsize,locale_t loc,const char * __restrict format,va_list ap)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
132 lc = localeconv_l(loc);
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 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 |= 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 /* Do we have enough space to put number with
199 * required width ?
200 */
201 if ((unsigned int)width >= maxsize - (dst - s))
202 goto e2big_error;
203 }
204
205 /* Left precision */
206 if (*fmt == '#') {
207 if (!isdigit((unsigned char)*++fmt))
208 goto format_error;
209 GET_NUMBER(left_prec);
210 if ((unsigned int)left_prec >= maxsize - (dst - s))
211 goto e2big_error;
212 }
213
214 /* Right precision */
215 if (*fmt == '.') {
216 if (!isdigit((unsigned char)*++fmt))
217 goto format_error;
218 GET_NUMBER(right_prec);
219 if ((unsigned int)right_prec >= maxsize - (dst - s) -
220 left_prec)
221 goto e2big_error;
222 }
223
224 /* Conversion Characters */
225 switch (*fmt++) {
226 case 'i': /* use internaltion currency format */
227 flags |= USE_INTL_CURRENCY;
228 break;
229 case 'n': /* use national currency format */
230 flags &= ~(USE_INTL_CURRENCY);
231 break;
232 default: /* required character is missing or
233 premature EOS */
234 goto format_error;
235 }
236
237 if (currency_symbol != NULL)
238 free(currency_symbol);
239 if (flags & USE_INTL_CURRENCY) {
240 currency_symbol = strdup(lc->int_curr_symbol);
241 if (currency_symbol != NULL)
242 space_char = *(currency_symbol+3);
243 } else
244 currency_symbol = strdup(lc->currency_symbol);
245
246 if (currency_symbol == NULL)
247 goto end_error; /* ENOMEM. */
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((flags ^ IS_NEGATIVE),
261 currency_symbol) -
262 __calc_left_pad(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(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(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) /* XXX: ? */
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
352 && (sign_posn == 0
353 || sign_posn == 1
354 || sign_posn == 2
355 || sign_posn == 4)))
356 PRINT(space_char);
357 PRINTS(currency_symbol); /* XXX: len */
358 if (sign_posn == 4) {
359 if (sep_by_space == 2)
360 PRINT(' ');
361 PRINTS(signstr);
362 }
363 }
364 }
365
366 if (sign_posn == 2) {
367 if (sep_by_space == 2)
368 PRINT(' ');
369 PRINTS(signstr);
370 }
371
372 if (sign_posn == 0 && (flags & IS_NEGATIVE))
373 PRINT(')');
374
375 if (dst - tmpptr < width) {
376 if (flags & LEFT_JUSTIFY) {
377 while (dst - tmpptr < width)
378 PRINT(' ');
379 } else {
380 pad_size = dst-tmpptr;
381 memmove(tmpptr + width-pad_size, tmpptr,
382 pad_size);
383 memset(tmpptr, ' ', width-pad_size);
384 dst += width-pad_size;
385 }
386 }
387 }
388
389 PRINT('\0');
390 free(asciivalue);
391 free(currency_symbol);
392 return (dst - s - 1); /* return 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 return (-1);
409 }
410 ssize_t
strfmon_l(char * __restrict s,size_t maxsize,locale_t loc,const char * __restrict format,...)411 strfmon_l(char * __restrict s, size_t maxsize, locale_t loc, const char * __restrict format,
412 ...)
413 {
414 size_t ret;
415 va_list ap;
416 va_start(ap, format);
417 ret = vstrfmon_l(s, maxsize, loc, format, ap);
418 va_end(ap);
419 return ret;
420 }
421
422 ssize_t
strfmon(char * __restrict s,size_t maxsize,const char * __restrict format,...)423 strfmon(char * __restrict s, size_t maxsize, const char * __restrict format,
424 ...)
425 {
426 size_t ret;
427 va_list ap;
428 va_start(ap, format);
429 ret = vstrfmon_l(s, maxsize, __get_locale(), format, ap);
430 va_end(ap);
431 return ret;
432 }
433
434
435 static void
__setup_vars(int flags,char * cs_precedes,char * sep_by_space,char * sign_posn,char ** signstr)436 __setup_vars(int flags, char *cs_precedes, char *sep_by_space,
437 char *sign_posn, char **signstr) {
438
439 struct lconv *lc = localeconv();
440
441 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) {
442 *cs_precedes = lc->int_n_cs_precedes;
443 *sep_by_space = lc->int_n_sep_by_space;
444 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn;
445 *signstr = (lc->negative_sign[0] == '\0') ? "-"
446 : lc->negative_sign;
447 } else if (flags & USE_INTL_CURRENCY) {
448 *cs_precedes = lc->int_p_cs_precedes;
449 *sep_by_space = lc->int_p_sep_by_space;
450 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn;
451 *signstr = lc->positive_sign;
452 } else if (flags & IS_NEGATIVE) {
453 *cs_precedes = lc->n_cs_precedes;
454 *sep_by_space = lc->n_sep_by_space;
455 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn;
456 *signstr = (lc->negative_sign[0] == '\0') ? "-"
457 : lc->negative_sign;
458 } else {
459 *cs_precedes = lc->p_cs_precedes;
460 *sep_by_space = lc->p_sep_by_space;
461 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn;
462 *signstr = lc->positive_sign;
463 }
464
465 /* Set defult values for unspecified information. */
466 if (*cs_precedes != 0)
467 *cs_precedes = 1;
468 if (*sep_by_space == CHAR_MAX)
469 *sep_by_space = 0;
470 if (*sign_posn == CHAR_MAX)
471 *sign_posn = 0;
472 }
473
474 static int
__calc_left_pad(int flags,char * cur_symb)475 __calc_left_pad(int flags, char *cur_symb) {
476
477 char cs_precedes, sep_by_space, sign_posn, *signstr;
478 int left_chars = 0;
479
480 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr);
481
482 if (cs_precedes != 0) {
483 left_chars += strlen(cur_symb);
484 if (sep_by_space != 0)
485 left_chars++;
486 }
487
488 switch (sign_posn) {
489 case 1:
490 left_chars += strlen(signstr);
491 break;
492 case 3:
493 case 4:
494 if (cs_precedes != 0)
495 left_chars += strlen(signstr);
496 }
497 return (left_chars);
498 }
499
500 static int
get_groups(int size,char * grouping)501 get_groups(int size, char *grouping) {
502
503 int chars = 0;
504
505 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */
506 return (0);
507
508 while (size > (int)*grouping) {
509 chars++;
510 size -= (int)*grouping++;
511 /* no more grouping ? */
512 if (*grouping == CHAR_MAX)
513 break;
514 /* rest grouping with same value ? */
515 if (*grouping == 0) {
516 chars += (size - 1) / *(grouping - 1);
517 break;
518 }
519 }
520 return (chars);
521 }
522
523 /* convert double to ASCII */
524 static char *
__format_grouped_double(double value,int * flags,int left_prec,int right_prec,int pad_char)525 __format_grouped_double(double value, int *flags,
526 int left_prec, int right_prec, int pad_char) {
527
528 char *rslt;
529 char *avalue;
530 int avalue_size;
531
532 size_t bufsize;
533 char *bufend;
534
535 int padded;
536
537 struct lconv *lc = localeconv();
538 char *grouping;
539 char decimal_point;
540 char thousands_sep;
541
542 int groups = 0;
543
544 grouping = lc->mon_grouping;
545 decimal_point = *lc->mon_decimal_point;
546 if (decimal_point == '\0')
547 decimal_point = *lc->decimal_point;
548 thousands_sep = *lc->mon_thousands_sep;
549 if (thousands_sep == '\0')
550 thousands_sep = *lc->thousands_sep;
551
552 /* fill left_prec with default value */
553 if (left_prec == -1)
554 left_prec = 0;
555
556 /* fill right_prec with default value */
557 if (right_prec == -1) {
558 if (*flags & USE_INTL_CURRENCY)
559 right_prec = lc->int_frac_digits;
560 else
561 right_prec = lc->frac_digits;
562
563 if (right_prec == CHAR_MAX) /* POSIX locale ? */
564 right_prec = 2;
565 }
566
567 if (*flags & NEED_GROUPING)
568 left_prec += get_groups(left_prec, grouping);
569
570 /* convert to string */
571 avalue_size = asprintf(&avalue, "%*.*f", left_prec + right_prec + 1,
572 right_prec, value);
573 if (avalue_size < 0)
574 return (NULL);
575
576 /* make sure that we've enough space for result string */
577 bufsize = avalue_size * 2 + 1;
578 rslt = calloc(1, bufsize);
579 if (rslt == NULL) {
580 free(avalue);
581 return (NULL);
582 }
583 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */
584
585 /* skip spaces at beginning */
586 padded = 0;
587 while (avalue[padded] == ' ') {
588 padded++;
589 avalue_size--;
590 }
591
592 if (right_prec > 0) {
593 bufend -= right_prec;
594 memcpy(bufend, avalue + avalue_size+padded-right_prec,
595 right_prec);
596 *--bufend = decimal_point;
597 avalue_size -= (right_prec + 1);
598 }
599
600 if ((*flags & NEED_GROUPING) &&
601 thousands_sep != '\0' && /* XXX: need investigation */
602 *grouping != CHAR_MAX &&
603 *grouping > 0) {
604 while (avalue_size > (int)*grouping) {
605 GRPCPY(*grouping);
606 GRPSEP;
607 grouping++;
608
609 /* no more grouping ? */
610 if (*grouping == CHAR_MAX)
611 break;
612
613 /* rest grouping with same value ? */
614 if (*grouping == 0) {
615 grouping--;
616 while (avalue_size > *grouping) {
617 GRPCPY(*grouping);
618 GRPSEP;
619 }
620 }
621 }
622 if (avalue_size != 0)
623 GRPCPY(avalue_size);
624 padded -= groups;
625
626 } else {
627 bufend -= avalue_size;
628 memcpy(bufend, avalue+padded, avalue_size);
629 if (right_prec == 0)
630 padded--; /* decrease assumed $decimal_point */
631 }
632
633 /* do padding with pad_char */
634 if (padded > 0) {
635 bufend -= padded;
636 memset(bufend, pad_char, padded);
637 }
638
639 bufsize = bufsize - (bufend - rslt) + 1;
640 memmove(rslt, bufend, bufsize);
641 free(avalue);
642 return (rslt);
643 }
644