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/***
*isctype.c - support is* ctype functions/macros for two-byte multibyte chars
*
* Copyright (c) 1991-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Defines _isctype.c - support is* ctype functions/macros for
* two-byte multibyte chars.
*
*Revision History:
* 10-11-91 ETC Created.
* 12-08-91 ETC Updated api; added multhread lock; check char masks.
* 04-06-92 KRS Fix logic error in return value.
* 08-07-92 GJF _CALLTYPE4 (bogus usage) -> _CRTAPI1 (legit).
* 01-19-93 CFW Change C1_* to new names, call new APIs.
* 03-04-93 CFW Removed CTRL-Z.
* 04-01-93 CFW Remove EOF test (handled by array), return masked.
* 06-02-93 SRW ignore _INTL if _NTSUBSET_ defined.
*
*******************************************************************************/
#include <stdio.h>
#include <cruntime.h>
#include <ctype.h>
#include <locale.h>
#include <setlocal.h>
#include <os2dll.h>
#if defined(_INTL) && !defined(_NTSUBSET_)
/*
* Use GetCharType() API so check that character type masks agree between
* ctype.h and winnls.h
*/
#if _UPPER != C1_UPPER || \
_LOWER != C1_LOWER || \
_DIGIT != C1_DIGIT || \
_SPACE != C1_SPACE || \
_PUNCT != C1_PUNCT || \
_CONTROL != C1_CNTRL
#error Character type masks do not agree in ctype and winnls
#endif
/***
*_isctype - support is* ctype functions/macros for two-byte multibyte chars
*
*Purpose:
* This function is called by the is* ctype functions/macros
* (e.g. isalpha()) when their argument is a two-byte multibyte char.
* Returns true or false depending on whether the argument satisfies
* the character class property encoded by the mask.
*
*Entry:
* int c - the multibyte character whose type is to be tested
* unsigned int mask - the mask used by the is* functions/macros
* corresponding to each character class property
*
* The leadbyte and the trailbyte should be packed into the int c as:
*
* H.......|.......|.......|.......L
* 0 0 leadbyte trailbyte
*
*Exit:
* Returns non-zero if c is of the character class.
* Returns 0 if c is not of the character class.
*
*Exceptions:
* Returns 0 on any error.
*
*******************************************************************************/
int _CRTAPI1 _isctype (
int c,
int mask
)
{
wchar_t widechar[2], chartype;
char buffer[3];
/* c valid between -1 and 255 */
if (((unsigned)(c + 1)) <= 256)
return _pctype[c] & mask;
_mlock (_LC_CTYPE_LOCK);
if (isleadbyte(c>>8 & 0xff))
{
buffer[0] = (c>>8 & 0xff); /* put lead-byte at start of str */
buffer[1] = (char)c;
buffer[2] = 0;
}
else
{
buffer[0] = (char)c;
buffer[1] = 0;
}
if (MultiByteToWideChar(_lc_codepage, MB_PRECOMPOSED,
buffer, -1, widechar, 2) == 0)
return 0;
_munlock (_LC_CTYPE_LOCK);
if (GetStringTypeW(CT_CTYPE1, widechar, 2, &chartype) != NO_ERROR) {
return 0;
}
return (int)(chartype & mask);
}
#else /* defined(_INTL) && !defined(_NTSUBSET_) */
int _CRTAPI1 _isctype (
int c,
int mask
)
{
return 0;
}
#endif /* _INTL */
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