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git.saurik.com Git - apple/libc.git/blob - locale/FreeBSD/wcstod.c
2 * Copyright (c) 2002 Tim J. Robbins
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: src/lib/libc/locale/wcstod.c,v 1.4 2004/04/07 09:47:56 tjr Exp $");
30 #include "xlocale_private.h"
39 * __wcs_end_offset calculates the offset to the end within the wide character
40 * string, assuming numbers and letters are single bytes in multibyte
41 * representation, get the actual decimal string for localeconv_l. If the
42 * decimal point was within the string, compensate for the fact that the
43 * (possible more than one byte) decimal point one takes one wide character.
45 __private_extern__
size_t
46 __wcs_end_offset(const char * __restrict buf
, const char * __restrict end
, locale_t loc
)
48 const char *decimalpoint
= localeconv_l(loc
)->decimal_point
;
52 if ((p
= strnstr(buf
, decimalpoint
, n
)) != NULL
)
53 n
-= strlen(decimalpoint
) - 1;
58 * Convert a string to a double-precision number.
60 * This is the wide-character counterpart of strtod(). So that we do not
61 * have to duplicate the code of strtod() here, we convert the supplied
62 * wide character string to multibyte and call strtod() on the result.
63 * This assumes that the multibyte encoding is compatible with ASCII
64 * for at least the digits and letters. The radix character can be more
69 wcstod_l(const wchar_t * __restrict nptr
, wchar_t ** __restrict endptr
,
72 static const mbstate_t initial
;
79 char mb
[MB_CUR_MAX
+ 1];
80 const wchar_t *nptr0
= nptr
;
83 NORMALIZE_LOCALE(loc
);
84 ctype
= __numeric_ctype(loc
);
86 while (iswspace_l(*nptr
, ctype
))
89 if ((b
= _simple_salloc()) == NULL
)
94 while (*nptr
&& (len
= wcrtomb_l(mb
, *nptr
, &mbs
, ctype
)) != (size_t)-1) {
96 if (_simple_sappend(b
, mb
) < 0) { /* no memory */
103 /* Let strtod() do most of the work for us. */
104 buf
= _simple_string(b
);
105 val
= strtod_l(buf
, &end
, loc
);
108 * We only know where the number ended in the _multibyte_
109 * representation of the string. If the caller wants to know
110 * where it ended, count multibyte characters to find the
111 * corresponding position in the wide char string.
114 /* XXX Assume each wide char is one byte. */
115 *endptr
= (end
== buf
) ? (wchar_t *)nptr0
: ((wchar_t *)first
+ __wcs_end_offset(buf
, end
, loc
));
123 wcstod(const wchar_t * __restrict nptr
, wchar_t ** __restrict endptr
)
125 return wcstod_l(nptr
, endptr
, __current_locale());