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/* Copyright (C) 2000-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdbool.h>
#include <wchar.h>
#include <wctype.h>
#include <scratch_buffer.h>
#include "../locale/outdigits.h"
#include "../locale/outdigitswc.h"
static CHAR_T *
_i18n_number_rewrite (CHAR_T *w, CHAR_T *rear_ptr, CHAR_T *end)
{
#ifdef COMPILE_WPRINTF
# define decimal NULL
# define thousands NULL
#else
char decimal[MB_LEN_MAX + 1];
char thousands[MB_LEN_MAX + 1];
#endif
/* "to_outpunct" is a map from ASCII decimal point and thousands-sep
to their equivalent in locale. This is defined for locales which
use extra decimal point and thousands-sep. */
wctrans_t map = __wctrans ("to_outpunct");
wint_t wdecimal = __towctrans (L'.', map);
wint_t wthousands = __towctrans (L',', map);
#ifndef COMPILE_WPRINTF
if (__glibc_unlikely (map != NULL))
{
mbstate_t state;
memset (&state, '\0', sizeof (state));
size_t n = __wcrtomb (decimal, wdecimal, &state);
if (n == (size_t) -1)
memcpy (decimal, ".", 2);
else
decimal[n] = '\0';
memset (&state, '\0', sizeof (state));
n = __wcrtomb (thousands, wthousands, &state);
if (n == (size_t) -1)
memcpy (thousands, ",", 2);
else
thousands[n] = '\0';
}
#endif
/* Copy existing string so that nothing gets overwritten. */
CHAR_T *src;
struct scratch_buffer buffer;
scratch_buffer_init (&buffer);
if (!scratch_buffer_set_array_size (&buffer, rear_ptr - w, sizeof (CHAR_T)))
/* If we cannot allocate the memory don't rewrite the string.
It is better than nothing. */
return w;
src = buffer.data;
CHAR_T *s = (CHAR_T *) __mempcpy (src, w,
(rear_ptr - w) * sizeof (CHAR_T));
w = end;
/* Process all characters in the string. */
while (--s >= src)
{
if (*s >= '0' && *s <= '9')
{
if (sizeof (CHAR_T) == 1)
w = (CHAR_T *) outdigit_value ((char *) w, *s - '0');
else
*--w = (CHAR_T) outdigitwc_value (*s - '0');
}
else if (__builtin_expect (map == NULL, 1) || (*s != '.' && *s != ','))
*--w = *s;
else
{
if (sizeof (CHAR_T) == 1)
{
const char *outpunct = *s == '.' ? decimal : thousands;
size_t dlen = strlen (outpunct);
w -= dlen;
while (dlen-- > 0)
w[dlen] = outpunct[dlen];
}
else
*--w = *s == '.' ? (CHAR_T) wdecimal : (CHAR_T) wthousands;
}
}
scratch_buffer_free (&buffer);
return w;
}
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