55 lines
1.9 KiB
Markdown
55 lines
1.9 KiB
Markdown
#### 概述
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对宽字符的操作，宽字符就是由多个字节组成的字符
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#### 相关函数
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```c
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/* 把1个字节转换为宽字符 */
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wint_t btowc(int c);
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/*
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* 把多字节序列转换为宽字符
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* pwc：宽字符
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* S：多字节序列
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* n：要转换的字节数
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* ps：记录移动状态
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*/
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size_t mbrtowc(wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
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/* 把多字节字符串src转换为宽字符组成的字符串dest,len是转换的字符数量，ps是移位状态 */
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size_t mbsrtowcs(wchar_t *dest, const char **src, size_t len, mbstate_t *ps);
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/* 把一个宽字符转化成多字符序列
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* pwc：多字符序列的指针
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* wc：要转化的宽字符
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* ps：移位状态
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*/
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size_t wcrtomb(char *s, wchar_t wc, mbstate_t *ps);
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/* 在由宽字符组成的字符串wcs内搜索宽字符wc
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* 返回值：如果找到对应字符返回其指针，否则返回NULL。
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*/
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wchar_t *wcschr(const wchar_t *wcs, wchar_t wc);
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/* 把由宽字符组成的字符串src转换到多字节字符串dest，len是转换的字符数量，ps是移位状态 */
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size_t wcsrtombs(char *dest, const wchar_t **src, size_t len, mbstate_t *ps);
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/* */
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long wcstol (const wchar_t *__restrict, wchar_t **__restrict, int);
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unsigned long wcstoul (const wchar_t *__restrict, wchar_t **__restrict, int);
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/* 等价于宽字节版的printf()函数族的功能 */
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int wprintf(const wchar_t *format, ...);
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int fwprintf(FILE *stream, const wchar_t *format, ...);
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int swprintf(wchar_t *wcs, size_t maxlen, const wchar_t *format, ...);
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int vwprintf(const wchar_t *format, va_list args);
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int vfwprintf(FILE *stream, const wchar_t *format, va_list args);
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int vswprintf(wchar_t *wcs, size_t maxlen, const wchar_t *format, va_list args);
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int wscanf (const wchar_t *__restrict, ...);
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int fwscanf (FILE *__restrict, const wchar_t *__restrict, ...);
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int swscanf (const wchar_t *__restrict, const wchar_t *__restrict, ...);
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```
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