/***
*a_map.c - A version of LCMapString.
*
* Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
* Use either LCMapStringA or LCMapStringW depending on which is available
*
*******************************************************************************/
#include <cruntime.h>
#include <internal.h>
#include <stdlib.h>
#include <locale.h>
#include <awint.h>
#include <dbgint.h>
#include <malloc.h>
#include <locale.h>
#include <mtdll.h>
#include <setlocal.h>
/***
*int __cdecl strncnt - count characters in a string, up to n.
*
*Purpose:
* Internal local support function. Counts characters in string before
* null. If null is not found in n chars, then return n.
*
*Entry:
* const char *string - start of string
* int n - byte count
*
*Exit:
* returns number of bytes from start of string to
* null (exclusive), up to n.
*
*Exceptions:
*
*******************************************************************************/
static int __cdecl strncnt (
const char *string,
int cnt
)
{
int n = cnt;
char *cp = (char *)string;
while (n-- && *cp)
cp++;
return cnt - n - 1;
}
/***
*int __cdecl __crtLCMapStringA - Get type information about an ANSI string.
*
*Purpose:
* Internal support function. Assumes info in ANSI string format. Tries
* to use NLS API call LCMapStringA if available and uses LCMapStringW
* if it must. If neither are available it fails and returns 0.
*
*Entry:
* LPCWSTR LocaleName - locale context for the comparison.
* DWORD dwMapFlags - see NT\Chicago docs
* LPCSTR lpSrcStr - pointer to string to be mapped
* int cchSrc - wide char (word) count of input string
* (including NULL if any)
* (-1 if NULL terminated)
* LPSTR lpDestStr - pointer to memory to store mapping
* int cchDest - char (byte) count of buffer (including NULL)
* int code_page - for MB/WC conversion. If 0, use __lc_codepage
* BOOL bError - TRUE if MB_ERR_INVALID_CHARS set on call to
* MultiByteToWideChar when GetStringTypeW used.
*
*Exit:
* Success: number of chars written to lpDestStr (including NULL)
* Failure: 0
*
*Exceptions:
*
*******************************************************************************/
static int __cdecl __crtLCMapStringA_stat(
_locale_t plocinfo,
LPCWSTR LocaleName,
DWORD dwMapFlags,
LPCSTR lpSrcStr,
int cchSrc,
LPSTR lpDestStr,
int cchDest,
int code_page,
BOOL bError
)
{
/*
* LCMapString will map past NULL. Must find NULL if in string
* before cchSrc characters.
*/
if (cchSrc > 0) {
int cchSrcCnt = strncnt(lpSrcStr, cchSrc);
/*
* Include NULL in cchSrc if lpSrcStr terminated within cchSrc bytes.
*/
if (cchSrcCnt < cchSrc) {
cchSrc = cchSrcCnt + 1;
} else {
cchSrc = cchSrcCnt;
}
}
int retval = 0;
int inbuff_size;
int outbuff_size;
wchar_t *inwbuffer = NULL;
wchar_t *outwbuffer = NULL;
/*
* Convert string and return the requested information. Note that
* we are converting to a wide string so there is not a
* one-to-one correspondence between number of wide chars in the
* input string and the number of *bytes* in the buffer. However,
* there had *better be* a one-to-one correspondence between the
* number of wide characters and the number of multibyte characters
* or the resulting mapped string will be worthless to the user.
*/
/*
* Use __lc_codepage for conversion if code_page not specified
*/
if (0 == code_page)
code_page = plocinfo->locinfo->lc_codepage;
/* find out how big a buffer we need (includes NULL if any) */
if ( 0 == (inbuff_size =
MultiByteToWideChar( code_page,
bError ? MB_PRECOMPOSED |
MB_ERR_INVALID_CHARS :
MB_PRECOMPOSED,
lpSrcStr,
cchSrc,
NULL,
0 )) )
return 0;
/* allocate enough space for wide chars */
inwbuffer = (wchar_t *)_calloca( inbuff_size, sizeof(wchar_t) );
if ( inwbuffer == NULL ) {
return 0;
}
/* do the conversion */
if ( 0 == MultiByteToWideChar( code_page,
MB_PRECOMPOSED,
lpSrcStr,
cchSrc,
inwbuffer,
inbuff_size) )
goto error_cleanup;
/* get size required for string mapping */
if ( 0 == (retval = __crtLCMapStringEx( LocaleName,
dwMapFlags,
inwbuffer,
inbuff_size,
NULL,
0)) )
goto error_cleanup;
if (dwMapFlags & LCMAP_SORTKEY) {
/* retval is size in BYTES */
if (0 != cchDest) {
if (retval > cchDest)
goto error_cleanup;
/* do string mapping */
if ( 0 == __crtLCMapStringEx( LocaleName,
dwMapFlags,
inwbuffer,
inbuff_size,
(LPWSTR)lpDestStr,
cchDest) )
goto error_cleanup;
}
}
else {
/* retval is size in wide chars */
outbuff_size = retval;
/* allocate enough space for wide chars (includes NULL if any) */
outwbuffer = (wchar_t *)_calloca( outbuff_size, sizeof(wchar_t) );
if ( outwbuffer == NULL ) {
goto error_cleanup;
}
/* do string mapping */
if ( 0 == __crtLCMapStringEx( LocaleName,
dwMapFlags,
inwbuffer,
inbuff_size,
outwbuffer,
outbuff_size) )
goto error_cleanup;
if (0 == cchDest) {
/* get size required */
if ( 0 == (retval =
WideCharToMultiByte( code_page,
0,
outwbuffer,
outbuff_size,
NULL,
0,
NULL,
NULL )) )
goto error_cleanup;
}
else {
/* convert mapping */
if ( 0 == (retval =
WideCharToMultiByte( code_page,
0,
outwbuffer,
outbuff_size,
lpDestStr,
cchDest,
NULL,
NULL )) )
goto error_cleanup;
}
}
error_cleanup:
if ( outwbuffer != NULL )
_freea(outwbuffer);
_freea(inwbuffer);
return retval;
}
extern "C" int __cdecl __crtLCMapStringA(
_locale_t plocinfo,
LPCWSTR LocaleName,
DWORD dwMapFlags,
LPCSTR lpSrcStr,
int cchSrc,
LPSTR lpDestStr,
int cchDest,
int code_page,
BOOL bError
)
{
_LocaleUpdate _loc_update(plocinfo);
return __crtLCMapStringA_stat(
_loc_update.GetLocaleT(),
LocaleName,
dwMapFlags,
lpSrcStr,
cchSrc,
lpDestStr,
cchDest,
code_page,
bError
);
}