112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/* Copyright (C) 2000-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdbool.h>
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#include <wchar.h>
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#include <wctype.h>
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#include <scratch_buffer.h>
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#include "../locale/outdigits.h"
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#include "../locale/outdigitswc.h"
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static CHAR_T *
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_i18n_number_rewrite (CHAR_T *w, CHAR_T *rear_ptr, CHAR_T *end)
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{
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#ifdef COMPILE_WPRINTF
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# define decimal NULL
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# define thousands NULL
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#else
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char decimal[MB_LEN_MAX + 1];
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char thousands[MB_LEN_MAX + 1];
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#endif
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/* "to_outpunct" is a map from ASCII decimal point and thousands-sep
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to their equivalent in locale. This is defined for locales which
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use extra decimal point and thousands-sep. */
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wctrans_t map = __wctrans ("to_outpunct");
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wint_t wdecimal = __towctrans (L'.', map);
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wint_t wthousands = __towctrans (L',', map);
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#ifndef COMPILE_WPRINTF
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if (__glibc_unlikely (map != NULL))
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{
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mbstate_t state;
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memset (&state, '\0', sizeof (state));
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size_t n = __wcrtomb (decimal, wdecimal, &state);
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if (n == (size_t) -1)
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memcpy (decimal, ".", 2);
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else
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decimal[n] = '\0';
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memset (&state, '\0', sizeof (state));
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n = __wcrtomb (thousands, wthousands, &state);
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if (n == (size_t) -1)
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memcpy (thousands, ",", 2);
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else
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thousands[n] = '\0';
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}
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#endif
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/* Copy existing string so that nothing gets overwritten. */
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CHAR_T *src;
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struct scratch_buffer buffer;
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scratch_buffer_init (&buffer);
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if (!scratch_buffer_set_array_size (&buffer, rear_ptr - w, sizeof (CHAR_T)))
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/* If we cannot allocate the memory don't rewrite the string.
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It is better than nothing. */
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return w;
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src = buffer.data;
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CHAR_T *s = (CHAR_T *) __mempcpy (src, w,
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(rear_ptr - w) * sizeof (CHAR_T));
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w = end;
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/* Process all characters in the string. */
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while (--s >= src)
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{
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if (*s >= '0' && *s <= '9')
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{
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if (sizeof (CHAR_T) == 1)
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w = (CHAR_T *) outdigit_value ((char *) w, *s - '0');
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else
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*--w = (CHAR_T) outdigitwc_value (*s - '0');
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}
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else if (__builtin_expect (map == NULL, 1) || (*s != '.' && *s != ','))
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*--w = *s;
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else
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{
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if (sizeof (CHAR_T) == 1)
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{
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const char *outpunct = *s == '.' ? decimal : thousands;
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size_t dlen = strlen (outpunct);
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w -= dlen;
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while (dlen-- > 0)
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w[dlen] = outpunct[dlen];
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}
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else
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*--w = *s == '.' ? (CHAR_T) wdecimal : (CHAR_T) wthousands;
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}
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}
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scratch_buffer_free (&buffer);
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return w;
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}
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