2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
7 * Copyright (c) 2011 The FreeBSD Foundation
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/types.h>
48 #include "xlocale_private.h"
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 ? */
61 #define PRINT(CH) do { \
62 if (dst >= s + maxsize) \
67 #define PRINTS(STR) do { \
69 while (*tmps != '\0') \
73 #define GET_NUMBER(VAR) do { \
75 while (isdigit((unsigned char)*fmt)) { \
76 if (VAR > INT_MAX / 10) \
86 #define GRPCPY(howmany) do { \
90 *--bufend = *(avalue+avalue_size+padded); \
95 bufend -= thousands_sep_size; \
96 memcpy(bufend, thousands_sep, thousands_sep_size); \
100 static void __setup_vars(int, char *, char *, char *, char **);
101 static int __calc_left_pad(int, char *);
102 static char *__format_grouped_double(double, int *, int, int, int);
105 vstrfmon_l(char * __restrict s, size_t maxsize, locale_t loc,
106 const char * __restrict format, va_list ap)
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 */
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 */
122 char cs_precedes, /* values gathered from struct lconv */
128 char *tmpptr; /* temporary vars */
133 lc = localeconv_l(loc);
137 currency_symbol = NULL;
141 /* pass nonformating characters AS IS */
147 /* "%%" mean just '%' */
148 if (*(fmt+1) == '%') {
155 /* set up initial values */
156 flags = (NEED_GROUPING|LOCALE_POSN);
157 pad_char = ' '; /* padding character is "space" */
158 left_prec = -1; /* no left precision specified */
159 right_prec = -1; /* no right precision specified */
160 width = -1; /* no width specified */
161 value = 0; /* we have no value to print now */
166 case '=': /* fill character */
168 if (pad_char == '\0')
171 case '^': /* not group currency */
172 flags &= ~(NEED_GROUPING);
174 case '+': /* use locale defined signs */
175 if (flags & SIGN_POSN_USED)
177 flags |= (SIGN_POSN_USED|LOCALE_POSN);
179 case '(': /* enclose negatives with () */
180 if (flags & SIGN_POSN_USED)
182 flags |= (SIGN_POSN_USED|PARENTH_POSN);
184 case '!': /* suppress currency symbol */
185 flags |= SUPRESS_CURR_SYMBOL;
187 case '-': /* alignment (left) */
188 flags |= LEFT_JUSTIFY;
197 if (isdigit((unsigned char)*fmt)) {
199 /* Do we have enough space to put number with
202 if ((unsigned int)width >= maxsize - (dst - s))
208 if (!isdigit((unsigned char)*++fmt))
210 GET_NUMBER(left_prec);
211 if ((unsigned int)left_prec >= maxsize - (dst - s))
215 /* Right precision */
217 if (!isdigit((unsigned char)*++fmt))
219 GET_NUMBER(right_prec);
220 if ((unsigned int)right_prec >= maxsize - (dst - s) -
225 /* Conversion Characters */
227 case 'i': /* use internaltion currency format */
228 flags |= USE_INTL_CURRENCY;
230 case 'n': /* use national currency format */
231 flags &= ~(USE_INTL_CURRENCY);
233 default: /* required character is missing or
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);
245 currency_symbol = strdup(lc->currency_symbol);
247 if (currency_symbol == NULL)
248 goto end_error; /* ENOMEM. */
251 value = va_arg(ap, double);
255 flags |= IS_NEGATIVE;
259 /* fill left_prec with amount of padding chars */
260 if (left_prec >= 0) {
261 pad_size = __calc_left_pad((flags ^ IS_NEGATIVE),
263 __calc_left_pad(flags, currency_symbol);
268 if (asciivalue != NULL)
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() */
276 /* set some variables for later use */
277 __setup_vars(flags, &cs_precedes, &sep_by_space,
278 &sign_posn, &signstr);
281 * Description of some LC_MONETARY's values:
283 * p_cs_precedes & n_cs_precedes
285 * = 1 - $currency_symbol precedes the value
286 * for a monetary quantity with a non-negative value
287 * = 0 - symbol succeeds the value
289 * p_sep_by_space & n_sep_by_space
291 * = 0 - no space separates $currency_symbol
292 * from the value for a monetary quantity with a
294 * = 1 - space separates the symbol from the value
295 * = 2 - space separates the symbol and the sign string,
298 * p_sign_posn & n_sign_posn
300 * = 0 - parentheses enclose the quantity and the
302 * = 1 - the sign string precedes the quantity and the
304 * = 2 - the sign string succeeds the quantity and the
306 * = 3 - the sign string precedes the $currency_symbol
307 * = 4 - the sign string succeeds the $currency_symbol
313 while (pad_size-- > 0)
316 if (sign_posn == 0 && (flags & IS_NEGATIVE))
319 if (cs_precedes == 1) {
320 if (sign_posn == 1 || sign_posn == 3) {
322 if (sep_by_space == 2) /* XXX: ? */
326 if (!(flags & SUPRESS_CURR_SYMBOL)) {
327 PRINTS(currency_symbol);
329 if (sign_posn == 4) {
330 if (sep_by_space == 2)
333 if (sep_by_space == 1)
335 } else if (sep_by_space == 1)
338 } else if (sign_posn == 1)
343 if (cs_precedes == 0) {
344 if (sign_posn == 3) {
345 if (sep_by_space == 1)
350 if (!(flags & SUPRESS_CURR_SYMBOL)) {
351 if ((sign_posn == 3 && sep_by_space == 2)
352 || (sep_by_space == 1
358 PRINTS(currency_symbol); /* XXX: len */
359 if (sign_posn == 4) {
360 if (sep_by_space == 2)
367 if (sign_posn == 2) {
368 if (sep_by_space == 2)
373 if (sign_posn == 0 && (flags & IS_NEGATIVE))
376 if (dst - tmpptr < width) {
377 if (flags & LEFT_JUSTIFY) {
378 while (dst - tmpptr < width)
381 pad_size = dst-tmpptr;
382 memmove(tmpptr + width-pad_size, tmpptr,
384 memset(tmpptr, ' ', width-pad_size);
385 dst += width-pad_size;
392 free(currency_symbol);
393 return (dst - s - 1); /* return size of put data except trailing '\0' */
404 if (asciivalue != NULL)
406 if (currency_symbol != NULL)
407 free(currency_symbol);
412 strfmon_l(char * __restrict s, size_t maxsize, locale_t loc, const char * __restrict format,
417 va_start(ap, format);
418 ret = vstrfmon_l(s, maxsize, loc, format, ap);
424 strfmon(char * __restrict s, size_t maxsize, const char * __restrict format,
429 va_start(ap, format);
430 ret = vstrfmon_l(s, maxsize, __get_locale(), format, ap);
437 __setup_vars(int flags, char *cs_precedes, char *sep_by_space,
438 char *sign_posn, char **signstr) {
440 struct lconv *lc = localeconv();
442 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) {
443 *cs_precedes = lc->int_n_cs_precedes;
444 *sep_by_space = lc->int_n_sep_by_space;
445 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn;
446 *signstr = (lc->negative_sign[0] == '\0') ? "-"
448 } else if (flags & USE_INTL_CURRENCY) {
449 *cs_precedes = lc->int_p_cs_precedes;
450 *sep_by_space = lc->int_p_sep_by_space;
451 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn;
452 *signstr = lc->positive_sign;
453 } else if (flags & IS_NEGATIVE) {
454 *cs_precedes = lc->n_cs_precedes;
455 *sep_by_space = lc->n_sep_by_space;
456 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn;
457 *signstr = (lc->negative_sign[0] == '\0') ? "-"
460 *cs_precedes = lc->p_cs_precedes;
461 *sep_by_space = lc->p_sep_by_space;
462 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn;
463 *signstr = lc->positive_sign;
466 /* Set defult values for unspecified information. */
467 if (*cs_precedes != 0)
469 if (*sep_by_space == CHAR_MAX)
471 if (*sign_posn == CHAR_MAX)
476 __calc_left_pad(int flags, char *cur_symb) {
478 char cs_precedes, sep_by_space, sign_posn, *signstr;
481 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr);
483 if (cs_precedes != 0) {
484 left_chars += strlen(cur_symb);
485 if (sep_by_space != 0)
491 left_chars += strlen(signstr);
495 if (cs_precedes != 0)
496 left_chars += strlen(signstr);
502 get_groups(int size, char *grouping) {
506 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */
509 while (size > (int)*grouping) {
511 size -= (int)*grouping++;
512 /* no more grouping ? */
513 if (*grouping == CHAR_MAX)
515 /* rest grouping with same value ? */
516 if (*grouping == 0) {
517 chars += (size - 1) / *(grouping - 1);
524 /* convert double to locale-encoded string */
526 __format_grouped_double(double value, int *flags,
527 int left_prec, int right_prec, int pad_char) {
538 struct lconv *lc = localeconv();
540 const char *decimal_point;
541 const char *thousands_sep;
542 size_t decimal_point_size;
543 size_t thousands_sep_size;
547 grouping = lc->mon_grouping;
548 decimal_point = lc->mon_decimal_point;
549 if (*decimal_point == '\0')
550 decimal_point = lc->decimal_point;
551 thousands_sep = lc->mon_thousands_sep;
552 if (*thousands_sep == '\0')
553 thousands_sep = lc->thousands_sep;
555 decimal_point_size = strlen(decimal_point);
556 thousands_sep_size = strlen(thousands_sep);
558 /* fill left_prec with default value */
562 /* fill right_prec with default value */
563 if (right_prec == -1) {
564 if (*flags & USE_INTL_CURRENCY)
565 right_prec = lc->int_frac_digits;
567 right_prec = lc->frac_digits;
569 if (right_prec == CHAR_MAX) /* POSIX locale ? */
573 if (*flags & NEED_GROUPING)
574 left_prec += get_groups(left_prec, grouping);
576 /* convert to string */
577 avalue_size = asprintf(&avalue, "%*.*f", left_prec + right_prec + 1,
582 /* make sure that we've enough space for result string */
583 bufsize = avalue_size * (1 + thousands_sep_size) + decimal_point_size +
585 rslt = calloc(1, bufsize);
590 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */
592 /* skip spaces at beginning */
594 while (avalue[padded] == ' ') {
599 if (right_prec > 0) {
600 bufend -= right_prec;
601 memcpy(bufend, avalue + avalue_size+padded-right_prec,
603 bufend -= decimal_point_size;
604 memcpy(bufend, decimal_point, decimal_point_size);
605 avalue_size -= (right_prec + 1);
608 if ((*flags & NEED_GROUPING) &&
609 thousands_sep_size > 0 && /* XXX: need investigation */
610 *grouping != CHAR_MAX &&
612 while (avalue_size > (int)*grouping) {
617 /* no more grouping ? */
618 if (*grouping == CHAR_MAX)
621 /* rest grouping with same value ? */
622 if (*grouping == 0) {
624 while (avalue_size > *grouping) {
630 if (avalue_size != 0)
635 bufend -= avalue_size;
636 memcpy(bufend, avalue+padded, avalue_size);
637 /* decrease assumed $decimal_point */
639 padded -= decimal_point_size;
642 /* do padding with pad_char */
645 memset(bufend, pad_char, padded);
648 bufsize = rslt + bufsize - bufend;
649 memmove(rslt, bufend, bufsize);