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- /***
- *mbbtype.c - Return type of byte based on previous byte (MBCS)
- *
- * Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
- *
- *Purpose:
- * Return type of byte based on previous byte (MBCS)
- *
- *******************************************************************************/
-
- #ifdef _MBCS
-
- #include <cruntime.h>
- #include <mbdata.h>
- #include <mbctype.h>
- #include <mbstring.h>
-
- /***
- *int _mbbtype(c, ctype) - Return type of byte based on previous byte (MBCS)
- *
- *Purpose:
- * Returns type of supplied byte. This decision is context
- * sensitive so a control test condition is supplied. Normally,
- * this is the type of the previous byte in the string.
- *
- *Entry:
- * unsigned char c = character to be checked
- * int ctype = control test condition (i.e., type of previous char)
- *
- *Exit:
- * _MBC_LEAD = if 1st byte of MBCS char
- * _MBC_TRAIL = if 2nd byte of MBCS char
- * _MBC_SINGLE = valid single byte char
- *
- * _MBC_ILLEGAL = if illegal char
- *
- *Exceptions:
- *
- *******************************************************************************/
-
- int __cdecl _mbbtype(
- unsigned char c,
- int ctype
- )
- {
-
- switch(ctype) {
-
- case(_MBC_LEAD):
- if (_ISTRAILBYTE(c))
- return(_MBC_TRAIL);
- else
- return(_MBC_ILLEGAL);
-
- case(_MBC_TRAIL):
- case(_MBC_SINGLE):
- case(_MBC_ILLEGAL):
- default:
- if (_ISLEADBYTE(c))
- return(_MBC_LEAD);
- else if (_ismbbprint(c))
- return(_MBC_SINGLE);
- else
- return(_MBC_ILLEGAL);
-
-
- }
-
- }
-
- #endif /* _MBCS */
-