1 | /* |
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2 | * Copyright (c) 1990 The Regents of the University of California. |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms are permitted |
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6 | * provided that the above copyright notice and this paragraph are |
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7 | * duplicated in all such forms and that any documentation, |
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8 | * advertising materials, and other materials related to such |
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9 | * distribution and use acknowledge that the software was developed |
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10 | * by the University of California, Berkeley. The name of the |
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11 | * University may not be used to endorse or promote products derived |
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12 | * from this software without specific prior written permission. |
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13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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16 | */ |
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17 | /* doc in vfwprintf.c */ |
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18 | |
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19 | #if defined(LIBC_SCCS) && !defined(lint) |
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20 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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21 | #endif /* LIBC_SCCS and not lint */ |
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22 | |
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23 | #include <_ansi.h> |
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24 | #include <reent.h> |
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25 | #include <stdio.h> |
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26 | #include <wchar.h> |
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27 | #include <limits.h> |
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28 | #include <stdarg.h> |
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29 | #include <errno.h> |
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30 | |
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31 | #include "local.h" |
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32 | |
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33 | int |
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34 | _vswprintf_r (struct _reent *ptr, |
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35 | wchar_t *str, |
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36 | size_t size, |
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37 | const wchar_t *fmt, |
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38 | va_list ap) |
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39 | { |
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40 | int ret; |
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41 | FILE f; |
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42 | |
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43 | if (size > INT_MAX / sizeof (wchar_t)) |
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44 | { |
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45 | ptr->_errno = EOVERFLOW; /* POSIX extension */ |
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46 | return EOF; |
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47 | } |
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48 | f._flags = __SWR | __SSTR; |
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49 | f._bf._base = f._p = (unsigned char *) str; |
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50 | f._bf._size = f._w = (size > 0 ? (size - 1) * sizeof (wchar_t) : 0); |
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51 | f._file = -1; /* No file. */ |
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52 | ret = _svfwprintf_r (ptr, &f, fmt, ap); |
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53 | /* _svfwprintf_r() does not put in a terminating NUL, so add one if |
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54 | * appropriate, which is whenever size is > 0. _svfwprintf_r() stops |
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55 | * after n-1, so always just put at the end. */ |
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56 | if (size > 0) { |
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57 | *(wchar_t *)f._p = L'\0'; /* terminate the string */ |
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58 | } |
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59 | if(ret >= size) { |
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60 | /* _svfwprintf_r() returns how many wide characters it would have printed |
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61 | * if there were enough space. Return an error if too big to fit in str, |
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62 | * unlike snprintf, which returns the size needed. */ |
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63 | ptr->_errno = EOVERFLOW; /* POSIX extension */ |
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64 | ret = -1; |
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65 | } |
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66 | return ret; |
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67 | } |
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68 | |
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69 | #ifndef _REENT_ONLY |
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70 | |
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71 | int |
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72 | vswprintf (wchar_t *__restrict str, |
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73 | size_t size, |
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74 | const wchar_t *__restrict fmt, |
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75 | va_list ap) |
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76 | { |
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77 | return _vswprintf_r (_REENT, str, size, fmt, ap); |
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78 | } |
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79 | |
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80 | #endif /* !_REENT_ONLY */ |
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