wchar_t 与 char的转换

ゝ一世哀愁。 2022-08-06 06:10 136阅读 0赞

Converts a sequence of wide characters to a corresponding sequence of multibyte characters. More secure versions of these functions are available; see wcstombs\_s, \_wcstombs\_s\_l.

size\_t wcstombs( 
char \*mbstr, 
const wchar\_t \*wcstr, 
size\_t count 
); 
size\_t \_wcstombs\_l( 
char \*mbstr, 
const wchar\_t \*wcstr, 
size\_t count, 
\_locale\_t locale 
); 
template <size\_t size> 
size\_t wcstombs( 
char (&mbstr)\[size\], 
const wchar\_t \*wcstr, 
size\_t count 
); // C++ only 
template <size\_t size> 
size\_t \_wcstombs\_l( 
char (&mbstr)\[size\], 
const wchar\_t \*wcstr, 
size\_t count, 
\_locale\_t locale 
); // C++ only

Parameters  
mbstr  
The address of a sequence of multibyte characters.

wcstr  
The address of a sequence of wide characters.

count  
The maximum number of bytes that can be stored in the multibyte output string.

locale  
The locale to use.

Converts a sequence of multibyte characters to a corresponding sequence of wide characters. Versions of mbstowcs, \_mbstowcs\_l with security enhancements as described in Security Enhancements in the CRT.

<table style="width: 100%;"> 
 <tbody> 
 <tr> 
 <th align="left"></th> 
 </tr> 
 <tr> 
 <td> <pre>errno_t mbstowcs_s(
 size_t *pReturnValue,
 wchar_t *wcstr,
 size_t sizeInWords,
 const char *mbstr,
 size_t count 
);
errno_t _mbstowcs_s_l(
 size_t *pReturnValue,
 wchar_t *wcstr,
 size_t sizeInWords,
 const char *mbstr,
 size_t count,
 _locale_t locale
);
template &lt;size_t size&gt;
errno_t mbstowcs_s(
 size_t *pReturnValue,
 wchar_t (&amp;wcstr)[size],
 const char *mbstr,
 size_t count 
); // C++ only
template &lt;size_t size&gt;
errno_t _mbstowcs_s_l(
 size_t *pReturnValue,
 wchar_t (&amp;wcstr)[size],
 const char *mbstr,
 size_t count,
 _locale_t locale
); // C++ only</pre> </td> 
 </tr> 
 </tbody> 
</table>

# Parameters #

\[out\] pReturnValue

The number of characters converted.

\[out\] wcstr

Address of buffer for the resulting converted wide character string.

\[in\] sizeInWords

The size of the wcstr buffer in words.

\[in\]mbstr

The address of a sequence of null terminated multibyte characters.

\[in\] count

The maximum number of wide characters to store in the wcstr buffer, not including the terminating null, or \_TRUNCATE.

\[in\] locale