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MBRTOWC

Section: Linux Programmer's Manual (3)
Updated: July 25, 1999
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mbrtowc - ¥Þ¥ë¥Á¥Ð¥¤¥ÈÎó¤ò¥ï¥¤¥ÉÊ¸»ú¤ËÊÑ´¹¤¹¤ë

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#include <wchar.h>

size_t mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);

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s ¤«¤é»Ï¤Þ¤ë n ¥Ð¥¤¥È¤¬´°Á´¤Ê¥Þ¥ë¥Á¥Ð¥¤¥ÈÊ¸»ú¤ò´Þ¤ó¤Ç ¤¤¤Ê¤¤¾ì¹ç¤Ë¤Ï¡¢mbrtowc ¤Ï (size_t)(-2) ¤òÊÖ¤¹¡£ ¥Þ¥ë¥Á¥Ð¥¤¥ÈÊ¸»úÎó¤Ë¾éÄ¹¤Ê¥·¥Õ¥È¥·¡¼¥±¥ó¥¹¤¬´Þ¤Þ¤ì¤Æ¤¤¤ë¤È¡¢ n >= MB_CUR_MAX ¤Î»þ¤Ë¤â¤³¤Î¤è¤¦¤Ê¤³¤È¤¬µ¯¤³¤ê¤¨¤ë¡£

s ¤«¤é»Ï¤Þ¤ë¥Þ¥ë¥Á¥Ð¥¤¥ÈÊ¸»úÎó¤¬¡¢¼¡¤Î´°Á´¤ÊÊ¸»ú¤ÎÁ°¤Ë ÉÔÀµ¤Ê¥Þ¥ë¥Á¥Ð¥¤¥ÈÎó¤ò´Þ¤ó¤Ç¤¤¤ë¾ì¹ç¤Ë¤Ï¡¢mbrtowc ¤Ï (size_t)(-1) ¤òÊÖ¤·¡¢errno ¤Ë EILSEQ ¤òÀßÄê¤¹¤ë¡£ ¤³¤Î¾ì¹ç¤Ï *ps ¤Ø¤Î±Æ¶Á¤ÏÌ¤ÄêµÁ¤Ç¤¢¤ë¡£

s ¤¬ NULL ¤Ç¤Ê¤¯ pwc ¤¬ NULL ¤Î¾ì¹ç¤Ï mbrtowc ´Ø¿ô¤Ï ¾åµ¤ÈÆ±ÍÍ¤ËÆ°ºî¤¹¤ë¤¬¡¢ÊÑ´¹¤·¤¿¥ï¥¤¥ÉÊ¸»ú¤Ï¥á¥â¥ê¤Ë¤Ï½ñ¤¹þ¤Þ¤ì¤Ê¤¤¡£

»°ÈÖÌÜ¤Î¾ì¹ç¤È¤·¤Æ s ¤¬ NULL ¤Î¾ì¹ç¤Ï pwc ¤È n ¤Ï ¤ÏÌµ»ë¤µ¤ì¤ë¡£mbrtowc ´Ø¿ô¤Ï *ps ¤ò½é´ü¾õÂÖ¤Ë¤·¤Æ 0 ¤òÊÖ¤¹¡£

¾åµ¤ÎÁ´¤Æ¤Î¾ì¹ç¤Ë¤ª¤¤¤Æ¡¢ps ¤¬ NULL ¥Ý¥¤¥ó¥¿¡¼¤Ê¤é¤ÐÂå¤ê¤Ë mbrtowc ´Ø¿ô¤Î¤ß¤¬»ÈÍÑ¤¹¤ëÀÅÅª¤ÇÌ¾Á°¤Î¤Ê¤¤¾õÂÖ¤¬»ÈÍÑ¤µ¤ì¤ë¡£

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L'\0' °Ê³°¤Î¥ï¥¤¥ÉÊ¸»ú¤òÇ§¼±¤·¤¿¾ì¹ç¤Ë¤Ï mbrtowc ´Ø¿ô¤Ï s ¤«¤é»Ï¤Þ¤ë¥Þ¥ë¥Á¥Ð¥¤¥ÈÎó¤«¤é²òÀÏ¤·¤¿¥Ð¥¤¥È¿ô¤òÊÖ¤¹¡£ L'\0' ¥ï¥¤¥ÉÊ¸»ú¤òÇ§¼±¤·¤¿¾ì¹ç¤Ë¤Ï 0 ¤òÊÖ¤¹¡£ ÉÔÀµ¤Ê¥Þ¥ë¥Á¥Ð¥¤¥ÈÎó¤ËÁø¶ø¤·¤¿¾ì¹ç¤Ë¤Ï (size_t)(-1) ¤òÊÖ¤·¡¢ errno ¤Ë EILSEQ ¤òÀßÄê¤¹¤ë¡£´°Á´¤Ê¥Þ¥ë¥Á¥Ð¥¤¥ÈÊ¸»ú¤ò ²òÀÏ¤Ç¤¤Ê¤«¤Ã¤¿¾ì¹ç¤Ë¤Ï (size_t)(-2) ¤òÊÖ¤· n ¤òÁý²Ã¤µ¤»¤ë É¬Í×¤¬¤¢¤ë¤³¤È¤ò¼¨¤¹¡£

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ISO/ANSI C, UNIX98

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mbrtowc ¤ÎÆ°ºî¤Ï¸½ºß¤Î¥í¥±¡¼¥ë¤Î LC_CTYPE ¥«¥Æ¥´¥ê¤Ë°ÍÂ¸¤·¤Æ¤¤¤ë¡£

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