home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Tricks of the Windows Gam…ming Gurus (2nd Edition)
/
Disc2.iso
/
vc98
/
crt
/
src
/
mbbtype.c
< prev
next >
Wrap
C/C++ Source or Header
|
1998-06-17
|
2KB
|
72 lines
/***
*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 */