lstring.c

winNT技术操作系统,国外开放的原代码和LIUX一样

/*
 * COPYRIGHT:       See COPYING in the top level directory
 * PROJECT:         ReactOS system libraries
 * FILE:            lib/kernel32/file/lstring.c
 * PURPOSE:         Local string functions
 * PROGRAMMER:      Ariadne ( [e-mail])
 * UPDATE HISTORY:
 *                  Created 01/11/98
 */

#include <k32.h>


static _SEH_FILTER(lstr_page_fault)
{
    if (_SEH_GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
        return _SEH_EXECUTE_HANDLER;
    else
        return _SEH_CONTINUE_SEARCH;
}


/*
 * @implemented
 */
int
STDCALL
lstrcmpA(
	 LPCSTR lpString1,
	 LPCSTR lpString2
	 )
{
   int Result;

   if (lpString1 == lpString2)
      return 0;
   if (lpString1 == NULL)
      return -1;
   if (lpString2 == NULL)
      return 1;

   Result = CompareStringA(GetThreadLocale(), 0, lpString1, -1, lpString2, -1);
   if (Result) Result -= 2;

   return Result;
}


/*
 * @implemented
 */
int
STDCALL
lstrcmpiA(
	  LPCSTR lpString1,
	  LPCSTR lpString2
	  )
{
   int Result;

   if (lpString1 == lpString2)
      return 0;
   if (lpString1 == NULL)
      return -1;
   if (lpString2 == NULL)
      return 1;

   Result = CompareStringA(GetThreadLocale(), NORM_IGNORECASE, lpString1, -1,
                           lpString2, -1);
   if (Result) Result -= 2;

   return Result;
}


/*
 * @implemented
 */
LPSTR
STDCALL
lstrcpynA(
	  LPSTR lpString1,
	  LPCSTR lpString2,
	  int iMaxLength
	  )
{
    LPSTR d = lpString1;
    LPCSTR s = lpString2;
    UINT count = iMaxLength;
    LPSTR Ret = NULL;

    _SEH_TRY
    {
        while ((count > 1) && *s)
        {
            count--;
            *d++ = *s++;
        }
        if (count) *d = 0;

        Ret = lpString1;
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError( ERROR_INVALID_PARAMETER );
    }
    _SEH_END;

    return Ret;
}


/*
 * @implemented
 */
LPSTR
STDCALL
lstrcpyA(
	 LPSTR lpString1,
	 LPCSTR lpString2
	 )
{
    LPSTR Ret = NULL;

    _SEH_TRY
    {
        memmove(lpString1, lpString2, strlen(lpString2) + 1);
        Ret = lpString1;
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
    }
    _SEH_END;

    return Ret;
}


/*
 * @implemented
 */
LPSTR
STDCALL
lstrcatA(
	 LPSTR lpString1,
	 LPCSTR lpString2
	 )
{
    LPSTR Ret = NULL;

    _SEH_TRY
    {
        Ret = strcat(lpString1, lpString2);
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
    }
    _SEH_END;

    return Ret;

}


/*
 * @implemented
 */
int
STDCALL
lstrlenA(
	 LPCSTR lpString
	 )
{
    INT Ret = 0;

    _SEH_TRY
    {
        Ret = strlen(lpString);
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
    }
    _SEH_END;

    return Ret;
}


/*
 * @implemented
 */
int
STDCALL
lstrcmpW(
	 LPCWSTR lpString1,
	 LPCWSTR lpString2
	 )
{
   int Result;

   if (lpString1 == lpString2)
      return 0;
   if (lpString1 == NULL)
      return -1;
   if (lpString2 == NULL)
      return 1;

   Result = CompareStringW(GetThreadLocale(), 0, lpString1, -1, lpString2, -1);
   if (Result) Result -= 2;

   return Result;
}


/*
 * @implemented
 */
int
STDCALL
lstrcmpiW(
    LPCWSTR lpString1,
    LPCWSTR lpString2
    )
{
   int Result;

   if (lpString1 == lpString2)
      return 0;
   if (lpString1 == NULL)
      return -1;
   if (lpString2 == NULL)
      return 1;

   Result = CompareStringW(GetThreadLocale(), NORM_IGNORECASE, lpString1, -1, lpString2, -1);
   if (Result) Result -= 2;

   return Result;
}


/*
 * @implemented
 */
LPWSTR
STDCALL
lstrcpynW(
    LPWSTR lpString1,
    LPCWSTR lpString2,
    int iMaxLength
    )
{
    LPWSTR d = lpString1;
    LPCWSTR s = lpString2;
    UINT count = iMaxLength;
    LPWSTR Ret = NULL;

    _SEH_TRY
    {
        while ((count > 1) && *s)
        {
            count--;
            *d++ = *s++;
        }
        if (count) *d = 0;

        Ret = lpString1;
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError( ERROR_INVALID_PARAMETER );
    }
    _SEH_END;

    return Ret;
}


/*
 * @implemented
 */
LPWSTR
STDCALL
lstrcpyW(
    LPWSTR lpString1,
    LPCWSTR lpString2
    )
{
    LPWSTR Ret = NULL;

    _SEH_TRY
    {
        Ret = wcscpy(lpString1, lpString2);
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
    }
    _SEH_END;

    return Ret;
}


/*
 * @implemented
 */
LPWSTR
STDCALL
lstrcatW(
    LPWSTR lpString1,
    LPCWSTR lpString2
    )
{
    LPWSTR Ret = NULL;

    _SEH_TRY
    {
        Ret = wcscat(lpString1, lpString2);
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
    }
    _SEH_END;

    return Ret;
}


/*
 * @implemented
 */
int
STDCALL
lstrlenW(
    LPCWSTR lpString
    )
{
    INT Ret = 0;

    _SEH_TRY
    {
        Ret = wcslen(lpString);
    }
    _SEH_EXCEPT(lstr_page_fault)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
    }
    _SEH_END;

    return Ret;
}