2 * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
5 * Copyright (c) 2011 The FreeBSD Foundation
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $FreeBSD: head/lib/libc/stdlib/strfmon.c 227753 2011-11-20 14:45:42Z theraven $
34 #include <sys/types.h>
44 #include "xlocale_private.h"
47 #define NEED_GROUPING 0x01 /* print digits grouped (default) */
48 #define SIGN_POSN_USED 0x02 /* '+' or '(' usage flag */
49 #define LOCALE_POSN 0x04 /* use locale defined +/- (default) */
50 #define PARENTH_POSN 0x08 /* enclose negative amount in () */
51 #define SUPRESS_CURR_SYMBOL 0x10 /* supress the currency from output */
52 #define LEFT_JUSTIFY 0x20 /* left justify */
53 #define USE_INTL_CURRENCY 0x40 /* use international currency symbol */
54 #define IS_NEGATIVE 0x80 /* is argument value negative ? */
57 #define PRINT(CH) do { \
58 if (dst >= s + maxsize) \
63 #define PRINTS(STR) do { \
65 while (*tmps != '\0') \
69 #define GET_NUMBER(VAR) do { \
71 while (isdigit((unsigned char)*fmt)) { \
72 if (VAR > INT_MAX / 10) \
82 #define GRPCPY(howmany) do { \
86 *--bufend = *(avalue+avalue_size+padded); \
91 *--bufend = thousands_sep; \
95 static void __setup_vars(int, char *, char *, char *, char **);
96 static int __calc_left_pad(int, char *);
97 static char *__format_grouped_double(double, int *, int, int, int);
100 vstrfmon_l(char * __restrict s, size_t maxsize, locale_t loc,
101 const char * __restrict format, 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 */
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 */
117 char cs_precedes, /* values gathered from struct lconv */
123 char *tmpptr; /* temporary vars */
128 lc = localeconv_l(loc);
132 currency_symbol = NULL;
136 /* pass nonformating characters AS IS */
142 /* "%%" mean just '%' */
143 if (*(fmt+1) == '%') {
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 */
161 case '=': /* fill character */
163 if (pad_char == '\0')
166 case '^': /* not group currency */
167 flags &= ~(NEED_GROUPING);
169 case '+': /* use locale defined signs */
170 if (flags & SIGN_POSN_USED)
172 flags |= (SIGN_POSN_USED|LOCALE_POSN);
174 case '(': /* enclose negatives with () */
175 if (flags & SIGN_POSN_USED)
177 flags |= (SIGN_POSN_USED|PARENTH_POSN);
179 case '!': /* suppress currency symbol */
180 flags |= SUPRESS_CURR_SYMBOL;
182 case '-': /* alignment (left) */
183 flags |= LEFT_JUSTIFY;
192 if (isdigit((unsigned char)*fmt)) {
194 /* Do we have enough space to put number with
197 if ((unsigned int)width >= maxsize - (dst - s))
203 if (!isdigit((unsigned char)*++fmt))
205 GET_NUMBER(left_prec);
206 if ((unsigned int)left_prec >= maxsize - (dst - s))
210 /* Right precision */
212 if (!isdigit((unsigned char)*++fmt))
214 GET_NUMBER(right_prec);
215 if ((unsigned int)right_prec >= maxsize - (dst - s) -
220 /* Conversion Characters */
222 case 'i': /* use internaltion currency format */
223 flags |= USE_INTL_CURRENCY;
225 case 'n': /* use national currency format */
226 flags &= ~(USE_INTL_CURRENCY);
228 default: /* required character is missing or
233 if (currency_symbol != NULL)
234 free(currency_symbol);
235 if (flags & USE_INTL_CURRENCY) {
236 currency_symbol = strdup(lc->int_curr_symbol);
237 if (currency_symbol != NULL)
238 space_char = *(currency_symbol+3);
240 currency_symbol = strdup(lc->currency_symbol);
242 if (currency_symbol == NULL)
243 goto end_error; /* ENOMEM. */
246 value = va_arg(ap, double);
250 flags |= IS_NEGATIVE;
254 /* fill left_prec with amount of padding chars */
255 if (left_prec >= 0) {
256 pad_size = __calc_left_pad((flags ^ IS_NEGATIVE),
258 __calc_left_pad(flags, currency_symbol);
263 if (asciivalue != NULL)
265 asciivalue = __format_grouped_double(value, &flags,
266 left_prec, right_prec, pad_char);
267 if (asciivalue == NULL)
268 goto end_error; /* errno already set */
269 /* to ENOMEM by malloc() */
271 /* set some variables for later use */
272 __setup_vars(flags, &cs_precedes, &sep_by_space,
273 &sign_posn, &signstr);
276 * Description of some LC_MONETARY's values:
278 * p_cs_precedes & n_cs_precedes
280 * = 1 - $currency_symbol precedes the value
281 * for a monetary quantity with a non-negative value
282 * = 0 - symbol succeeds the value
284 * p_sep_by_space & n_sep_by_space
286 * = 0 - no space separates $currency_symbol
287 * from the value for a monetary quantity with a
289 * = 1 - space separates the symbol from the value
290 * = 2 - space separates the symbol and the sign string,
293 * p_sign_posn & n_sign_posn
295 * = 0 - parentheses enclose the quantity and the
297 * = 1 - the sign string precedes the quantity and the
299 * = 2 - the sign string succeeds the quantity and the
301 * = 3 - the sign string precedes the $currency_symbol
302 * = 4 - the sign string succeeds the $currency_symbol
308 while (pad_size-- > 0)
311 if (sign_posn == 0 && (flags & IS_NEGATIVE))
314 if (cs_precedes == 1) {
315 if (sign_posn == 1 || sign_posn == 3) {
317 if (sep_by_space == 2) /* XXX: ? */
321 if (!(flags & SUPRESS_CURR_SYMBOL)) {
322 PRINTS(currency_symbol);
324 if (sign_posn == 4) {
325 if (sep_by_space == 2)
328 if (sep_by_space == 1)
330 } else if (sep_by_space == 1)
333 } else if (sign_posn == 1)
338 if (cs_precedes == 0) {
339 if (sign_posn == 3) {
340 if (sep_by_space == 1)
345 if (!(flags & SUPRESS_CURR_SYMBOL)) {
346 if ((sign_posn == 3 && sep_by_space == 2)
347 || (sep_by_space == 1
353 PRINTS(currency_symbol); /* XXX: len */
354 if (sign_posn == 4) {
355 if (sep_by_space == 2)
362 if (sign_posn == 2) {
363 if (sep_by_space == 2)
368 if (sign_posn == 0 && (flags & IS_NEGATIVE))
371 if (dst - tmpptr < width) {
372 if (flags & LEFT_JUSTIFY) {
373 while (dst - tmpptr < width)
376 pad_size = dst-tmpptr;
377 memmove(tmpptr + width-pad_size, tmpptr,
379 memset(tmpptr, ' ', width-pad_size);
380 dst += width-pad_size;
387 free(currency_symbol);
388 return (dst - s - 1); /* return size of put data except trailing '\0' */
399 if (asciivalue != NULL)
401 if (currency_symbol != NULL)
402 free(currency_symbol);
407 strfmon_l(char * __restrict s, size_t maxsize, locale_t loc, const char * __restrict format,
412 va_start(ap, format);
413 ret = vstrfmon_l(s, maxsize, loc, format, ap);
419 strfmon(char * __restrict s, size_t maxsize, const char * __restrict format,
424 va_start(ap, format);
425 ret = vstrfmon_l(s, maxsize, __get_locale(), format, ap);
432 __setup_vars(int flags, char *cs_precedes, char *sep_by_space,
433 char *sign_posn, char **signstr) {
435 struct lconv *lc = localeconv();
437 if ((flags & IS_NEGATIVE) && (flags & USE_INTL_CURRENCY)) {
438 *cs_precedes = lc->int_n_cs_precedes;
439 *sep_by_space = lc->int_n_sep_by_space;
440 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_n_sign_posn;
441 *signstr = (lc->negative_sign[0] == '\0') ? "-"
443 } else if (flags & USE_INTL_CURRENCY) {
444 *cs_precedes = lc->int_p_cs_precedes;
445 *sep_by_space = lc->int_p_sep_by_space;
446 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->int_p_sign_posn;
447 *signstr = lc->positive_sign;
448 } else if (flags & IS_NEGATIVE) {
449 *cs_precedes = lc->n_cs_precedes;
450 *sep_by_space = lc->n_sep_by_space;
451 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->n_sign_posn;
452 *signstr = (lc->negative_sign[0] == '\0') ? "-"
455 *cs_precedes = lc->p_cs_precedes;
456 *sep_by_space = lc->p_sep_by_space;
457 *sign_posn = (flags & PARENTH_POSN) ? 0 : lc->p_sign_posn;
458 *signstr = lc->positive_sign;
461 /* Set defult values for unspecified information. */
462 if (*cs_precedes != 0)
464 if (*sep_by_space == CHAR_MAX)
466 if (*sign_posn == CHAR_MAX)
471 __calc_left_pad(int flags, char *cur_symb) {
473 char cs_precedes, sep_by_space, sign_posn, *signstr;
476 __setup_vars(flags, &cs_precedes, &sep_by_space, &sign_posn, &signstr);
478 if (cs_precedes != 0) {
479 left_chars += strlen(cur_symb);
480 if (sep_by_space != 0)
486 left_chars += strlen(signstr);
490 if (cs_precedes != 0)
491 left_chars += strlen(signstr);
497 get_groups(int size, char *grouping) {
501 if (*grouping == CHAR_MAX || *grouping <= 0) /* no grouping ? */
504 while (size > (int)*grouping) {
506 size -= (int)*grouping++;
507 /* no more grouping ? */
508 if (*grouping == CHAR_MAX)
510 /* rest grouping with same value ? */
511 if (*grouping == 0) {
512 chars += (size - 1) / *(grouping - 1);
519 /* convert double to ASCII */
521 __format_grouped_double(double value, int *flags,
522 int left_prec, int right_prec, int pad_char) {
534 struct lconv *lc = localeconv();
541 grouping = lc->mon_grouping;
542 decimal_point = *lc->mon_decimal_point;
543 if (decimal_point == '\0')
544 decimal_point = *lc->decimal_point;
545 thousands_sep = *lc->mon_thousands_sep;
546 if (thousands_sep == '\0')
547 thousands_sep = *lc->thousands_sep;
549 /* fill left_prec with default value */
553 /* fill right_prec with default value */
554 if (right_prec == -1) {
555 if (*flags & USE_INTL_CURRENCY)
556 right_prec = lc->int_frac_digits;
558 right_prec = lc->frac_digits;
560 if (right_prec == CHAR_MAX) /* POSIX locale ? */
564 if (*flags & NEED_GROUPING)
565 left_prec += get_groups(left_prec, grouping);
567 /* convert to string */
568 snprintf(fmt, sizeof(fmt), "%%%d.%df", left_prec + right_prec + 1,
570 avalue_size = asprintf(&avalue, fmt, value);
574 /* make sure that we've enough space for result string */
575 bufsize = strlen(avalue)*2+1;
576 rslt = calloc(1, bufsize);
581 bufend = rslt + bufsize - 1; /* reserve space for trailing '\0' */
583 /* skip spaces at beggining */
585 while (avalue[padded] == ' ') {
590 if (right_prec > 0) {
591 bufend -= right_prec;
592 memcpy(bufend, avalue + avalue_size+padded-right_prec,
594 *--bufend = decimal_point;
595 avalue_size -= (right_prec + 1);
598 if ((*flags & NEED_GROUPING) &&
599 thousands_sep != '\0' && /* XXX: need investigation */
600 *grouping != CHAR_MAX &&
602 while (avalue_size > (int)*grouping) {
607 /* no more grouping ? */
608 if (*grouping == CHAR_MAX)
611 /* rest grouping with same value ? */
612 if (*grouping == 0) {
614 while (avalue_size > *grouping) {
620 if (avalue_size != 0)
625 bufend -= avalue_size;
626 memcpy(bufend, avalue+padded, avalue_size);
628 padded--; /* decrease assumed $decimal_point */
631 /* do padding with pad_char */
634 memset(bufend, pad_char, padded);
637 bufsize = bufsize - (bufend - rslt) + 1;
638 memmove(rslt, bufend, bufsize);