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| Standard C Library Functions | vfwprintf(3C) |
| | vfwprintf, vwprintf, vswprintf - wide-character formatted output of a stdarg argument list |
SYNOPSIS
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#include <stdarg.h>
#include <stdio.h>
#include <wchar.h> int vwprintf(const wchar_t *format, va_list arg); |
| | int vfwprintf(FILE *stream, const wchar_t *format, va_list arg); |
| | int vswprintf(wchar_t *s, size_t n, const wchar_t *format, va_list arg); |
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The vwprintf(), vfwprintf(), and vswprintf() functions are the same as wprintf(), fwprintf(), and swprintf() respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined by <stdarg.h>.
See stdarg(3HEAD).
These functions do not invoke the va_end() macro. However, as these functions do invoke the va_arg() macro, the value of ap after the
return is indeterminate.
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Applications using these functions should call va_end(ap) afterwards to clean up.
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See attributes(5) for descriptions of the following
attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | MT-Safe with exceptions |
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The vwprintf(), vfwprintf(), and vswprintf() functions can be used safely in multithreaded applications, as long as setlocale(3C) is not being called to change the locale.
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