1 | /* Formatting a monetary value according to the given locale. |
2 | Copyright (C) 1996-2017 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ |
19 | |
20 | #include <ctype.h> |
21 | #include <errno.h> |
22 | #include <langinfo.h> |
23 | #include <locale.h> |
24 | #include <monetary.h> |
25 | #include "../libio/libioP.h" |
26 | #include "../libio/strfile.h" |
27 | #include <printf.h> |
28 | #include <stdarg.h> |
29 | #include <stdio.h> |
30 | #include <string.h> |
31 | #include "../locale/localeinfo.h" |
32 | |
33 | |
34 | #define out_char(Ch) \ |
35 | do { \ |
36 | if (dest >= s + maxsize - 1) \ |
37 | { \ |
38 | __set_errno (E2BIG); \ |
39 | va_end (ap); \ |
40 | return -1; \ |
41 | } \ |
42 | *dest++ = (Ch); \ |
43 | } while (0) |
44 | |
45 | #define out_string(String) \ |
46 | do { \ |
47 | const char *_s = (String); \ |
48 | while (*_s) \ |
49 | out_char (*_s++); \ |
50 | } while (0) |
51 | |
52 | #define out_nstring(String, N) \ |
53 | do { \ |
54 | int _n = (N); \ |
55 | const char *_s = (String); \ |
56 | while (_n-- > 0) \ |
57 | out_char (*_s++); \ |
58 | } while (0) |
59 | |
60 | #define to_digit(Ch) ((Ch) - '0') |
61 | |
62 | |
63 | /* We use this code also for the extended locale handling where the |
64 | function gets as an additional argument the locale which has to be |
65 | used. To access the values we have to redefine the _NL_CURRENT |
66 | macro. */ |
67 | #undef _NL_CURRENT |
68 | #define _NL_CURRENT(category, item) \ |
69 | (current->values[_NL_ITEM_INDEX (item)].string) |
70 | |
71 | /* This function determines the number of digit groups in the output. |
72 | The definition is in printf_fp.c. */ |
73 | extern unsigned int __guess_grouping (unsigned int intdig_max, |
74 | const char *grouping, wchar_t sepchar); |
75 | |
76 | |
77 | /* We have to overcome some problems with this implementation. On the |
78 | one hand the strfmon() function is specified in XPG4 and of course |
79 | it has to follow this. But on the other hand POSIX.2 specifies |
80 | some information in the LC_MONETARY category which should be used, |
81 | too. Some of the information contradicts the information which can |
82 | be specified in format string. */ |
83 | ssize_t |
84 | __vstrfmon_l (char *s, size_t maxsize, __locale_t loc, const char *format, |
85 | va_list ap) |
86 | { |
87 | struct __locale_data *current = loc->__locales[LC_MONETARY]; |
88 | _IO_strfile f; |
89 | struct printf_info info; |
90 | char *dest; /* Pointer so copy the output. */ |
91 | const char *fmt; /* Pointer that walks through format. */ |
92 | |
93 | dest = s; |
94 | fmt = format; |
95 | |
96 | /* Loop through the format-string. */ |
97 | while (*fmt != '\0') |
98 | { |
99 | /* The floating-point value to output. */ |
100 | union |
101 | { |
102 | double dbl; |
103 | __long_double_t ldbl; |
104 | } |
105 | fpnum; |
106 | int int_format; |
107 | int print_curr_symbol; |
108 | int left_prec; |
109 | int left_pad; |
110 | int right_prec; |
111 | int group; |
112 | char pad; |
113 | int is_long_double; |
114 | int p_sign_posn; |
115 | int n_sign_posn; |
116 | int sign_posn; |
117 | int other_sign_posn; |
118 | int left; |
119 | int is_negative; |
120 | int sep_by_space; |
121 | int other_sep_by_space; |
122 | int cs_precedes; |
123 | int other_cs_precedes; |
124 | const char *sign_string; |
125 | const char *other_sign_string; |
126 | int done; |
127 | const char *currency_symbol; |
128 | size_t currency_symbol_len; |
129 | long int width; |
130 | char *startp; |
131 | const void *ptr; |
132 | char space_char; |
133 | |
134 | /* Process all character which do not introduce a format |
135 | specification. */ |
136 | if (*fmt != '%') |
137 | { |
138 | out_char (*fmt++); |
139 | continue; |
140 | } |
141 | |
142 | /* "%%" means a single '%' character. */ |
143 | if (fmt[1] == '%') |
144 | { |
145 | out_char (*++fmt); |
146 | ++fmt; |
147 | continue; |
148 | } |
149 | |
150 | /* Defaults for formatting. */ |
151 | int_format = 0; /* Use international curr. symbol */ |
152 | print_curr_symbol = 1; /* Print the currency symbol. */ |
153 | left_prec = -1; /* No left precision specified. */ |
154 | right_prec = -1; /* No right precision specified. */ |
155 | group = 1; /* Print digits grouped. */ |
156 | pad = ' '; /* Fill character is <SP>. */ |
157 | is_long_double = 0; /* Double argument by default. */ |
158 | p_sign_posn = -2; /* This indicates whether the */ |
159 | n_sign_posn = -2; /* '(' flag is given. */ |
160 | width = -1; /* No width specified so far. */ |
161 | left = 0; /* Right justified by default. */ |
162 | |
163 | /* Parse group characters. */ |
164 | while (1) |
165 | { |
166 | switch (*++fmt) |
167 | { |
168 | case '=': /* Set fill character. */ |
169 | pad = *++fmt; |
170 | if (pad == '\0') |
171 | { |
172 | /* Premature EOS. */ |
173 | __set_errno (EINVAL); |
174 | return -1; |
175 | } |
176 | continue; |
177 | case '^': /* Don't group digits. */ |
178 | group = 0; |
179 | continue; |
180 | case '+': /* Use +/- for sign of number. */ |
181 | if (n_sign_posn != -2) |
182 | { |
183 | __set_errno (EINVAL); |
184 | return -1; |
185 | } |
186 | p_sign_posn = *_NL_CURRENT (LC_MONETARY, P_SIGN_POSN); |
187 | n_sign_posn = *_NL_CURRENT (LC_MONETARY, N_SIGN_POSN); |
188 | continue; |
189 | case '(': /* Use ( ) for negative sign. */ |
190 | if (n_sign_posn != -2) |
191 | { |
192 | __set_errno (EINVAL); |
193 | return -1; |
194 | } |
195 | p_sign_posn = 0; |
196 | n_sign_posn = 0; |
197 | continue; |
198 | case '!': /* Don't print the currency symbol. */ |
199 | print_curr_symbol = 0; |
200 | continue; |
201 | case '-': /* Print left justified. */ |
202 | left = 1; |
203 | continue; |
204 | default: |
205 | /* Will stop the loop. */; |
206 | } |
207 | break; |
208 | } |
209 | |
210 | if (isdigit (*fmt)) |
211 | { |
212 | /* Parse field width. */ |
213 | width = to_digit (*fmt); |
214 | |
215 | while (isdigit (*++fmt)) |
216 | { |
217 | int val = to_digit (*fmt); |
218 | |
219 | if (width > LONG_MAX / 10 |
220 | || (width == LONG_MAX && val > LONG_MAX % 10)) |
221 | { |
222 | __set_errno (E2BIG); |
223 | return -1; |
224 | } |
225 | |
226 | width = width * 10 + val; |
227 | } |
228 | |
229 | /* If we don't have enough room for the demanded width we |
230 | can stop now and return an error. */ |
231 | if (width >= maxsize - (dest - s)) |
232 | { |
233 | __set_errno (E2BIG); |
234 | return -1; |
235 | } |
236 | } |
237 | |
238 | /* Recognize left precision. */ |
239 | if (*fmt == '#') |
240 | { |
241 | if (!isdigit (*++fmt)) |
242 | { |
243 | __set_errno (EINVAL); |
244 | return -1; |
245 | } |
246 | left_prec = to_digit (*fmt); |
247 | |
248 | while (isdigit (*++fmt)) |
249 | { |
250 | left_prec *= 10; |
251 | left_prec += to_digit (*fmt); |
252 | } |
253 | } |
254 | |
255 | /* Recognize right precision. */ |
256 | if (*fmt == '.') |
257 | { |
258 | if (!isdigit (*++fmt)) |
259 | { |
260 | __set_errno (EINVAL); |
261 | return -1; |
262 | } |
263 | right_prec = to_digit (*fmt); |
264 | |
265 | while (isdigit (*++fmt)) |
266 | { |
267 | right_prec *= 10; |
268 | right_prec += to_digit (*fmt); |
269 | } |
270 | } |
271 | |
272 | /* Handle modifier. This is an extension. */ |
273 | if (*fmt == 'L') |
274 | { |
275 | ++fmt; |
276 | if (!__ldbl_is_dbl) |
277 | is_long_double = 1; |
278 | } |
279 | |
280 | /* Handle format specifier. */ |
281 | char int_symbol[4]; |
282 | switch (*fmt++) |
283 | { |
284 | case 'i': { /* Use international currency symbol. */ |
285 | const char *int_curr_symbol; |
286 | |
287 | int_curr_symbol = _NL_CURRENT (LC_MONETARY, INT_CURR_SYMBOL); |
288 | strncpy(int_symbol, int_curr_symbol, 3); |
289 | int_symbol[3] = '\0'; |
290 | |
291 | currency_symbol_len = 3; |
292 | currency_symbol = &int_symbol[0]; |
293 | space_char = int_curr_symbol[3]; |
294 | int_format = 1; |
295 | break; |
296 | } |
297 | case 'n': /* Use national currency symbol. */ |
298 | currency_symbol = _NL_CURRENT (LC_MONETARY, CURRENCY_SYMBOL); |
299 | currency_symbol_len = strlen (currency_symbol); |
300 | space_char = ' '; |
301 | int_format = 0; |
302 | break; |
303 | default: /* Any unrecognized format is an error. */ |
304 | __set_errno (EINVAL); |
305 | return -1; |
306 | } |
307 | |
308 | /* If not specified by the format string now find the values for |
309 | the format specification. */ |
310 | if (p_sign_posn == -2) |
311 | p_sign_posn = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_SIGN_POSN : P_SIGN_POSN); |
312 | if (n_sign_posn == -2) |
313 | n_sign_posn = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_SIGN_POSN : N_SIGN_POSN); |
314 | |
315 | if (right_prec == -1) |
316 | { |
317 | right_prec = *_NL_CURRENT (LC_MONETARY, int_format ? INT_FRAC_DIGITS : FRAC_DIGITS); |
318 | |
319 | if (right_prec == '\377') |
320 | right_prec = 2; |
321 | } |
322 | |
323 | /* If we have to print the digits grouped determine how many |
324 | extra characters this means. */ |
325 | if (group && left_prec != -1) |
326 | left_prec += __guess_grouping (left_prec, |
327 | _NL_CURRENT (LC_MONETARY, MON_GROUPING), |
328 | *_NL_CURRENT (LC_MONETARY, |
329 | MON_THOUSANDS_SEP)); |
330 | |
331 | /* Now it's time to get the value. */ |
332 | if (is_long_double == 1) |
333 | { |
334 | fpnum.ldbl = va_arg (ap, long double); |
335 | is_negative = fpnum.ldbl < 0; |
336 | if (is_negative) |
337 | fpnum.ldbl = -fpnum.ldbl; |
338 | } |
339 | else |
340 | { |
341 | fpnum.dbl = va_arg (ap, double); |
342 | is_negative = fpnum.dbl < 0; |
343 | if (is_negative) |
344 | fpnum.dbl = -fpnum.dbl; |
345 | } |
346 | |
347 | /* We now know the sign of the value and can determine the format. */ |
348 | if (is_negative) |
349 | { |
350 | sign_string = _NL_CURRENT (LC_MONETARY, NEGATIVE_SIGN); |
351 | /* If the locale does not specify a character for the |
352 | negative sign we use a '-'. */ |
353 | if (*sign_string == '\0') |
354 | sign_string = (const char *) "-" ; |
355 | cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_CS_PRECEDES : N_CS_PRECEDES); |
356 | sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_SEP_BY_SPACE : N_SEP_BY_SPACE); |
357 | sign_posn = n_sign_posn; |
358 | |
359 | other_sign_string = _NL_CURRENT (LC_MONETARY, POSITIVE_SIGN); |
360 | other_cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_CS_PRECEDES : P_CS_PRECEDES); |
361 | other_sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_SEP_BY_SPACE : P_SEP_BY_SPACE); |
362 | other_sign_posn = p_sign_posn; |
363 | } |
364 | else |
365 | { |
366 | sign_string = _NL_CURRENT (LC_MONETARY, POSITIVE_SIGN); |
367 | cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_CS_PRECEDES : P_CS_PRECEDES); |
368 | sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_P_SEP_BY_SPACE : P_SEP_BY_SPACE); |
369 | sign_posn = p_sign_posn; |
370 | |
371 | other_sign_string = _NL_CURRENT (LC_MONETARY, NEGATIVE_SIGN); |
372 | if (*other_sign_string == '\0') |
373 | other_sign_string = (const char *) "-" ; |
374 | other_cs_precedes = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_CS_PRECEDES : N_CS_PRECEDES); |
375 | other_sep_by_space = *_NL_CURRENT (LC_MONETARY, int_format ? INT_N_SEP_BY_SPACE : N_SEP_BY_SPACE); |
376 | other_sign_posn = n_sign_posn; |
377 | } |
378 | |
379 | /* Set default values for unspecified information. */ |
380 | if (cs_precedes != 0) |
381 | cs_precedes = 1; |
382 | if (other_cs_precedes != 0) |
383 | other_cs_precedes = 1; |
384 | if (sep_by_space == '\377') |
385 | sep_by_space = 0; |
386 | if (other_sep_by_space == '\377') |
387 | other_sep_by_space = 0; |
388 | if (sign_posn == '\377') |
389 | sign_posn = 1; |
390 | if (other_sign_posn == '\377') |
391 | other_sign_posn = 1; |
392 | |
393 | /* Check for degenerate cases */ |
394 | if (sep_by_space == 2) |
395 | { |
396 | if (sign_posn == 0 || |
397 | (sign_posn == 1 && !cs_precedes) || |
398 | (sign_posn == 2 && cs_precedes)) |
399 | /* sign and symbol are not adjacent, so no separator */ |
400 | sep_by_space = 0; |
401 | } |
402 | if (other_sep_by_space == 2) |
403 | { |
404 | if (other_sign_posn == 0 || |
405 | (other_sign_posn == 1 && !other_cs_precedes) || |
406 | (other_sign_posn == 2 && other_cs_precedes)) |
407 | /* sign and symbol are not adjacent, so no separator */ |
408 | other_sep_by_space = 0; |
409 | } |
410 | |
411 | /* Set the left precision and padding needed for alignment */ |
412 | if (left_prec == -1) |
413 | { |
414 | left_prec = 0; |
415 | left_pad = 0; |
416 | } |
417 | else |
418 | { |
419 | /* Set left_pad to number of spaces needed to align positive |
420 | and negative formats */ |
421 | |
422 | int left_bytes = 0; |
423 | int other_left_bytes = 0; |
424 | |
425 | /* Work out number of bytes for currency string and separator |
426 | preceding the value */ |
427 | if (cs_precedes) |
428 | { |
429 | left_bytes += currency_symbol_len; |
430 | if (sep_by_space != 0) |
431 | ++left_bytes; |
432 | } |
433 | |
434 | if (other_cs_precedes) |
435 | { |
436 | other_left_bytes += currency_symbol_len; |
437 | if (other_sep_by_space != 0) |
438 | ++other_left_bytes; |
439 | } |
440 | |
441 | /* Work out number of bytes for the sign (or left parenthesis) |
442 | preceding the value */ |
443 | if (sign_posn == 0 && is_negative) |
444 | ++left_bytes; |
445 | else if (sign_posn == 1) |
446 | left_bytes += strlen (sign_string); |
447 | else if (cs_precedes && (sign_posn == 3 || sign_posn == 4)) |
448 | left_bytes += strlen (sign_string); |
449 | |
450 | if (other_sign_posn == 0 && !is_negative) |
451 | ++other_left_bytes; |
452 | else if (other_sign_posn == 1) |
453 | other_left_bytes += strlen (other_sign_string); |
454 | else if (other_cs_precedes && |
455 | (other_sign_posn == 3 || other_sign_posn == 4)) |
456 | other_left_bytes += strlen (other_sign_string); |
457 | |
458 | /* Compare the number of bytes preceding the value for |
459 | each format, and set the padding accordingly */ |
460 | if (other_left_bytes > left_bytes) |
461 | left_pad = other_left_bytes - left_bytes; |
462 | else |
463 | left_pad = 0; |
464 | } |
465 | |
466 | /* Perhaps we'll someday make these things configurable so |
467 | better start using symbolic names now. */ |
468 | #define left_paren '(' |
469 | #define right_paren ')' |
470 | |
471 | startp = dest; /* Remember start so we can compute length. */ |
472 | |
473 | while (left_pad-- > 0) |
474 | out_char (' '); |
475 | |
476 | if (sign_posn == 0 && is_negative) |
477 | out_char (left_paren); |
478 | |
479 | if (cs_precedes) |
480 | { |
481 | if (sign_posn != 0 && sign_posn != 2 && sign_posn != 4 |
482 | && sign_posn != 5) |
483 | { |
484 | out_string (sign_string); |
485 | if (sep_by_space == 2) |
486 | out_char (' '); |
487 | } |
488 | |
489 | if (print_curr_symbol) |
490 | out_string (currency_symbol); |
491 | |
492 | if (sign_posn == 4) |
493 | { |
494 | if (print_curr_symbol && sep_by_space == 2) |
495 | out_char (space_char); |
496 | out_string (sign_string); |
497 | if (sep_by_space == 1) |
498 | /* POSIX.2 and SUS are not clear on this case, but C99 |
499 | says a space follows the adjacent-symbol-and-sign */ |
500 | out_char (' '); |
501 | } |
502 | else |
503 | if (print_curr_symbol && sep_by_space == 1) |
504 | out_char (space_char); |
505 | } |
506 | else |
507 | if (sign_posn != 0 && sign_posn != 2 && sign_posn != 3 |
508 | && sign_posn != 4 && sign_posn != 5) |
509 | out_string (sign_string); |
510 | |
511 | /* Print the number. */ |
512 | #ifdef _IO_MTSAFE_IO |
513 | f._sbf._f._lock = NULL; |
514 | #endif |
515 | _IO_init_internal (&f._sbf._f, 0); |
516 | _IO_JUMPS (&f._sbf) = &_IO_str_jumps; |
517 | _IO_str_init_static_internal (&f, dest, (s + maxsize) - dest, dest); |
518 | /* We clear the last available byte so we can find out whether |
519 | the numeric representation is too long. */ |
520 | s[maxsize - 1] = '\0'; |
521 | |
522 | memset (&info, '\0', sizeof (info)); |
523 | info.prec = right_prec; |
524 | info.width = left_prec + (right_prec ? (right_prec + 1) : 0); |
525 | info.spec = 'f'; |
526 | info.is_long_double = is_long_double; |
527 | info.group = group; |
528 | info.pad = pad; |
529 | info.extra = 1; /* This means use values from LC_MONETARY. */ |
530 | |
531 | ptr = &fpnum; |
532 | done = __printf_fp_l (&f._sbf._f, loc, &info, &ptr); |
533 | if (done < 0) |
534 | return -1; |
535 | |
536 | if (s[maxsize - 1] != '\0') |
537 | { |
538 | __set_errno (E2BIG); |
539 | return -1; |
540 | } |
541 | |
542 | dest += done; |
543 | |
544 | if (!cs_precedes) |
545 | { |
546 | if (sign_posn == 3) |
547 | { |
548 | if (sep_by_space == 1) |
549 | out_char (' '); |
550 | out_string (sign_string); |
551 | } |
552 | |
553 | if (print_curr_symbol) |
554 | { |
555 | if ((sign_posn == 3 && sep_by_space == 2) |
556 | || (sign_posn == 4 && sep_by_space == 1) |
557 | || (sign_posn == 2 && sep_by_space == 1) |
558 | || (sign_posn == 1 && sep_by_space == 1) |
559 | || (sign_posn == 0 && sep_by_space == 1)) |
560 | out_char (space_char); |
561 | out_nstring (currency_symbol, currency_symbol_len); |
562 | } |
563 | |
564 | if (sign_posn == 4) |
565 | { |
566 | if (sep_by_space == 2) |
567 | out_char (' '); |
568 | out_string (sign_string); |
569 | } |
570 | } |
571 | |
572 | if (sign_posn == 2) |
573 | { |
574 | if (sep_by_space == 2) |
575 | out_char (' '); |
576 | out_string (sign_string); |
577 | } |
578 | |
579 | if (sign_posn == 0 && is_negative) |
580 | out_char (right_paren); |
581 | |
582 | /* Now test whether the output width is filled. */ |
583 | if (dest - startp < width) |
584 | { |
585 | if (left) |
586 | /* We simply have to fill using spaces. */ |
587 | do |
588 | out_char (' '); |
589 | while (dest - startp < width); |
590 | else |
591 | { |
592 | long int dist = width - (dest - startp); |
593 | for (char *cp = dest - 1; cp >= startp; --cp) |
594 | cp[dist] = cp[0]; |
595 | |
596 | dest += dist; |
597 | |
598 | do |
599 | startp[--dist] = ' '; |
600 | while (dist > 0); |
601 | } |
602 | } |
603 | } |
604 | |
605 | /* Terminate the string. */ |
606 | *dest = '\0'; |
607 | |
608 | return dest - s; |
609 | } |
610 | |
611 | ssize_t |
612 | ___strfmon_l (char *s, size_t maxsize, __locale_t loc, const char *format, ...) |
613 | { |
614 | va_list ap; |
615 | |
616 | va_start (ap, format); |
617 | |
618 | ssize_t res = __vstrfmon_l (s, maxsize, loc, format, ap); |
619 | |
620 | va_end (ap); |
621 | |
622 | return res; |
623 | } |
624 | ldbl_strong_alias (___strfmon_l, __strfmon_l) |
625 | ldbl_weak_alias (___strfmon_l, strfmon_l) |
626 | |