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3703468e | 1 | /* Copyright (C) 2000, 2004, 2008 Free Software Foundation, Inc. |
4295702f | 2 | This file is part of the GNU C Library. |
69c69fe1 | 3 | Contributed by Ulrich Drepper <drepper@gnu.org>, 2000. |
4295702f UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
4295702f UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
4295702f | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
4295702f | 19 | |
7be688b5 UD |
20 | #include <wchar.h> |
21 | #include <wctype.h> | |
22 | ||
69c69fe1 | 23 | #include "../locale/outdigits.h" |
4295702f UD |
24 | #include "../locale/outdigitswc.h" |
25 | ||
69c69fe1 | 26 | static CHAR_T * |
3703468e | 27 | _i18n_number_rewrite (CHAR_T *w, CHAR_T *rear_ptr, CHAR_T *end) |
4295702f | 28 | { |
7be688b5 | 29 | #ifdef COMPILE_WPRINTF |
7be688b5 UD |
30 | # define decimal NULL |
31 | # define thousands NULL | |
32 | #else | |
7be688b5 UD |
33 | char decimal[MB_LEN_MAX]; |
34 | char thousands[MB_LEN_MAX]; | |
35 | #endif | |
36 | ||
37 | /* "to_outpunct" is a map from ASCII decimal point and thousands-sep | |
38 | to their equivalent in locale. This is defined for locales which | |
39 | use extra decimal point and thousands-sep. */ | |
40 | wctrans_t map = __wctrans ("to_outpunct"); | |
3bd6014e UD |
41 | wint_t wdecimal = __towctrans (L'.', map); |
42 | wint_t wthousands = __towctrans (L',', map); | |
43e56b0e UD |
43 | |
44 | #ifndef COMPILE_WPRINTF | |
3bd6014e UD |
45 | if (__builtin_expect (map != NULL, 0)) |
46 | { | |
7be688b5 UD |
47 | mbstate_t state; |
48 | memset (&state, '\0', sizeof (state)); | |
49 | ||
50 | if (__wcrtomb (decimal, wdecimal, &state) == (size_t) -1) | |
51 | memcpy (decimal, ".", 2); | |
52 | ||
53 | memset (&state, '\0', sizeof (state)); | |
54 | ||
55 | if (__wcrtomb (thousands, wthousands, &state) == (size_t) -1) | |
56 | memcpy (thousands, ",", 2); | |
57 | } | |
3bd6014e | 58 | #endif |
69c69fe1 UD |
59 | |
60 | /* Copy existing string so that nothing gets overwritten. */ | |
3703468e UD |
61 | CHAR_T *src; |
62 | bool use_alloca = __libc_use_alloca ((rear_ptr - w) * sizeof (CHAR_T)); | |
63 | if (__builtin_expect (use_alloca, true)) | |
64 | src = (CHAR_T *) alloca ((rear_ptr - w) * sizeof (CHAR_T)); | |
65 | else | |
66 | { | |
67 | src = (CHAR_T *) malloc ((rear_ptr - w) * sizeof (CHAR_T)); | |
68 | if (src == NULL) | |
69 | /* If we cannot allocate the memory don't rewrite the string. | |
70 | It is better than nothing. */ | |
71 | return w; | |
72 | } | |
73 | ||
7be688b5 UD |
74 | CHAR_T *s = (CHAR_T *) __mempcpy (src, w, |
75 | (rear_ptr - w) * sizeof (CHAR_T)); | |
3703468e UD |
76 | |
77 | w = end; | |
69c69fe1 UD |
78 | |
79 | /* Process all characters in the string. */ | |
80 | while (--s >= src) | |
81 | { | |
82 | if (*s >= '0' && *s <= '9') | |
83 | { | |
84 | if (sizeof (CHAR_T) == 1) | |
85 | w = (CHAR_T *) outdigit_value ((char *) w, *s - '0'); | |
86 | else | |
87 | *--w = (CHAR_T) outdigitwc_value (*s - '0'); | |
88 | } | |
7be688b5 | 89 | else if (__builtin_expect (map == NULL, 1) || (*s != '.' && *s != ',')) |
69c69fe1 | 90 | *--w = *s; |
7be688b5 UD |
91 | else |
92 | { | |
93 | if (sizeof (CHAR_T) == 1) | |
94 | { | |
95 | const char *outpunct = *s == '.' ? decimal : thousands; | |
96 | size_t dlen = strlen (outpunct); | |
97 | ||
98 | w -= dlen; | |
99 | while (dlen-- > 0) | |
100 | w[dlen] = outpunct[dlen]; | |
101 | } | |
102 | else | |
103 | *--w = *s == '.' ? (CHAR_T) wdecimal : (CHAR_T) wthousands; | |
104 | } | |
69c69fe1 UD |
105 | } |
106 | ||
3703468e UD |
107 | if (! use_alloca) |
108 | free (src); | |
109 | ||
69c69fe1 | 110 | return w; |
4295702f | 111 | } |