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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6607 | serge | 1 | /* |
| 2 | (C) Copyright IBM Corp. 2009 |
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| 3 | |||
| 4 | All rights reserved. |
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| 5 | |||
| 6 | Redistribution and use in source and binary forms, with or without |
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| 7 | modification, are permitted provided that the following conditions are met: |
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| 8 | |||
| 9 | * Redistributions of source code must retain the above copyright notice, |
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| 10 | this list of conditions and the following disclaimer. |
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| 11 | * Redistributions in binary form must reproduce the above copyright |
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| 12 | notice, this list of conditions and the following disclaimer in the |
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| 13 | documentation and/or other materials provided with the distribution. |
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| 14 | * Neither the name of IBM nor the names of its contributors may be |
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| 15 | used to endorse or promote products derived from this software without |
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| 16 | specific prior written permission. |
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| 17 | |||
| 18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 21 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 22 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 23 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 24 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 25 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 26 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 27 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 28 | POSSIBILITY OF SUCH DAMAGE. |
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| 29 | */ |
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| 30 | |||
| 31 | #include |
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| 32 | #include |
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| 33 | #include |
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| 34 | #include |
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| 35 | #include |
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| 36 | #include "local.h" |
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| 37 | |||
| 38 | long double |
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| 39 | wcstold (const wchar_t *__restrict nptr, wchar_t **__restrict endptr) |
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| 40 | { |
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| 41 | #ifdef _LDBL_EQ_DBL |
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| 42 | /* On platforms where long double is as wide as double. */ |
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| 43 | return wcstod(nptr, endptr); |
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| 44 | |||
| 45 | #else /* This is a duplicate of the code in wcstod.c, but converted to long double. */ |
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| 46 | |||
| 47 | static const mbstate_t initial; |
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| 48 | mbstate_t mbs; |
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| 49 | long double val; |
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| 50 | char *buf, *end; |
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| 51 | const wchar_t *wcp; |
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| 52 | size_t len; |
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| 53 | |||
| 54 | while (iswspace (*nptr)) |
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| 55 | nptr++; |
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| 56 | |||
| 57 | /* Convert the supplied numeric wide char string to multibyte. */ |
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| 58 | wcp = nptr; |
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| 59 | mbs = initial; |
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| 60 | if ((len = wcsrtombs (NULL, &wcp, 0, &mbs)) == (size_t)-1) |
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| 61 | { |
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| 62 | if (endptr != NULL) |
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| 63 | *endptr = (wchar_t *) nptr; |
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| 64 | return 0.0L; |
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| 65 | } |
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| 66 | |||
| 67 | if ((buf = malloc (len + 1)) == NULL) |
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| 68 | return 0.0L; |
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| 69 | |||
| 70 | mbs = initial; |
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| 71 | wcsrtombs (buf, &wcp, len + 1, &mbs); |
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| 72 | |||
| 73 | val = strtold (buf, &end); |
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| 74 | |||
| 75 | /* We only know where the number ended in the _multibyte_ |
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| 76 | representation of the string. If the caller wants to know |
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| 77 | where it ended, count multibyte characters to find the |
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| 78 | corresponding position in the wide char string. */ |
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| 79 | |||
| 80 | if (endptr != NULL) |
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| 81 | { |
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| 82 | /* The only valid multibyte char in a float converted by |
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| 83 | strtold/wcstold is the radix char. What we do here is, |
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| 84 | figure out if the radix char was in the valid leading |
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| 85 | float sequence in the incoming string. If so, the |
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| 86 | multibyte float string is strlen (radix char) - 1 bytes |
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| 87 | longer than the incoming wide char string has characters. |
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| 88 | To fix endptr, reposition end as if the radix char was |
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| 89 | just one byte long. The resulting difference (end - buf) |
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| 90 | is then equivalent to the number of valid wide characters |
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| 91 | in the input string. */ |
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| 92 | len = strlen (localeconv ()->decimal_point); |
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| 93 | if (len > 1) |
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| 94 | { |
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| 95 | char *d = strstr (buf, localeconv ()->decimal_point); |
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| 96 | |||
| 97 | if (d && d < end) |
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| 98 | end -= len - 1; |
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| 99 | } |
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| 100 | |||
| 101 | *endptr = (wchar_t *) nptr + (end - buf); |
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| 102 | } |
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| 103 | |||
| 104 | free (buf); |
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| 105 | |||
| 106 | return val; |
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| 107 | #endif /* _LDBL_EQ_DBL */ |
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| 108 | } |