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140 lines
4.0 KiB
C
140 lines
4.0 KiB
C
/* Copyright (C) 2000, 2004, 2008 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.org>, 2000.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* Look up the value of the next multibyte character and return its numerical
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value if it is one of the digits known in the locale. If *DECIDED is
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-1 this means it is not yet decided which form it is and we have to
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search through all available digits. Otherwise we know which script
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the digits are from. */
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static inline char *
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outdigit_value (char *s, int n)
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{
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const char *outdigit;
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size_t dlen;
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assert (0 <= n && n <= 9);
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outdigit = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB + n);
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dlen = strlen (outdigit);
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s -= dlen;
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while (dlen-- > 0)
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s[dlen] = outdigit[dlen];
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return s;
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}
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/* Look up the value of the next multibyte character and return its numerical
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value if it is one of the digits known in the locale. If *DECIDED is
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-1 this means it is not yet decided which form it is and we have to
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search through all available digits. Otherwise we know which script
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the digits are from. */
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static inline wchar_t
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outdigitwc_value (int n)
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{
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assert (0 <= n && n <= 9);
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return nl_langinfo_wc (_NL_CTYPE_OUTDIGIT0_WC + n);
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}
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static char *
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_i18n_number_rewrite (char *w, char *rear_ptr, char *end)
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{
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char decimal[MB_LEN_MAX + 1];
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char thousands[MB_LEN_MAX + 1];
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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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if (__builtin_expect (map != NULL, 0))
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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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/* Copy existing string so that nothing gets overwritten. */
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char *src;
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int use_alloca = (rear_ptr - w) < 4096;
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if (__builtin_expect (use_alloca, 1))
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src = (char *) alloca (rear_ptr - w);
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else
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{
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src = (char *) malloc (rear_ptr - w);
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if (src == NULL)
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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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}
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memcpy (src, w, rear_ptr - w);
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char *s = src + (rear_ptr - w);
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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) == 1)
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w = (char *) outdigit_value ((char *) w, *s - '0');
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else
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*--w = (char) 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) == 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) wdecimal : (char) wthousands;
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}
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}
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if (! use_alloca)
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free (src);
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return w;
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}
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