mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
2.6 KiB
97 lines
2.6 KiB
/***
|
|
* mbschr.c - Search MBCS string for character
|
|
*
|
|
* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* Search MBCS string for a character
|
|
*
|
|
*Revision History:
|
|
* 11-19-92 KRS Ported from 16-bit sources.
|
|
* 05-12-93 KRS Fix handling of c=='\0'.
|
|
* 08-20-93 CFW Change param type to int, use new style param declarators.
|
|
* 10-05-93 GJF Replaced _CRTAPI1 with __cdecl.
|
|
* 04-15-93 CFW Add _MB_CP_LOCK.
|
|
* 05-09-94 CFW Optimize for SBCS.
|
|
* 05-19-94 CFW Enable non-Win32.
|
|
* 09-11-97 GJF Replaced __mbcodepage == 0 with _ISNOTMBCP.
|
|
* 04-06-98 GJF Revised multithread support based on threadmbcinfo
|
|
* structs
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#ifdef _MBCS
|
|
|
|
#include <mtdll.h>
|
|
#include <cruntime.h>
|
|
#include <string.h>
|
|
#include <mbdata.h>
|
|
#include <mbctype.h>
|
|
#include <mbstring.h>
|
|
#include <stddef.h>
|
|
|
|
|
|
/***
|
|
* _mbschr - Search MBCS string for character
|
|
*
|
|
*Purpose:
|
|
* Search the given string for the specified character.
|
|
* MBCS characters are handled correctly.
|
|
*
|
|
*Entry:
|
|
* unsigned char *string = string to search
|
|
* int c = character to search for
|
|
*
|
|
*Exit:
|
|
* returns a pointer to the first occurence of the specified char
|
|
* within the string.
|
|
*
|
|
* returns NULL if the character is not found n the string.
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
|
|
unsigned char * __cdecl _mbschr(
|
|
const unsigned char *string,
|
|
unsigned int c
|
|
)
|
|
{
|
|
unsigned short cc;
|
|
#ifdef _MT
|
|
pthreadmbcinfo ptmbci = _getptd()->ptmbcinfo;
|
|
|
|
if ( ptmbci != __ptmbcinfo )
|
|
ptmbci = __updatetmbcinfo();
|
|
|
|
if ( _ISNOTMBCP_MT(ptmbci) )
|
|
#else
|
|
if ( _ISNOTMBCP )
|
|
#endif
|
|
return strchr(string, c);
|
|
|
|
for (; (cc = *string); string++)
|
|
{
|
|
#ifdef _MT
|
|
if ( __ismbblead_mt(ptmbci, cc) )
|
|
#else
|
|
if ( _ismbblead(cc) )
|
|
#endif
|
|
{
|
|
if (*++string == '\0')
|
|
return NULL; /* error */
|
|
if ( c == (unsigned int)((cc << 8) | *string) ) /* DBCS match */
|
|
return (unsigned char *)(string - 1);
|
|
}
|
|
else if (c == (unsigned int)cc)
|
|
break; /* SBCS match */
|
|
}
|
|
|
|
if (c == (unsigned int)cc) /* check for SBCS match--handles NUL char */
|
|
return (unsigned char *)(string);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* _MBCS */
|