Leaked source code of windows server 2003
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.
 
 
 
 
 
 

110 lines
3.4 KiB

//////////////////////////////////////////////////////////////////////////////////////////////////
//
// strstr.c
//
// This file contains most commonly used string operation. ALl the setup project should link here
// or add the common utility here to avoid duplicating code everywhere or using CRT runtime.
//
// Created 4\15\997 inateeg got from shlwapi
//
///////////////////////////////////////////////////////////////////////////////////////////////////
#include <windows.h>
#include "sdsutils.h"
//=================================================================================================
//
//=================================================================================================
/*
* ChrCmpI - Case insensitive character comparison for DBCS
* Assumes w1, wMatch are characters to be compared;
* HIBYTE of wMatch is 0 if not a DBC
* Return FALSE if match, TRUE if not
*/
BOOL ChrCmpIA(WORD w1, WORD wMatch)
{
char sz1[3], sz2[3];
if (IsDBCSLeadByte(sz1[0] = LOBYTE(w1)))
{
sz1[1] = HIBYTE(w1);
sz1[2] = '\0';
}
else
sz1[1] = '\0';
*(WORD FAR *)sz2 = wMatch;
sz2[2] = '\0';
return lstrcmpiA(sz1, sz2);
}
/*
* ANSIStrChrI - Find first occurrence of character in string, case insensitive
* Assumes lpStart points to start of null terminated string
* wMatch is the character to match
* returns ptr to the first occurrence of ch in str, NULL if not found.
*/
LPSTR FAR PASCAL ANSIStrChrI(LPCSTR lpStart, WORD wMatch)
{
wMatch = (UINT)(IsDBCSLeadByte(LOBYTE(wMatch)) ? wMatch : LOBYTE(wMatch));
for ( ; *lpStart; lpStart = AnsiNext(lpStart))
{
if (!ChrCmpIA(*(UNALIGNED WORD FAR *)lpStart, wMatch))
return((LPSTR)lpStart);
}
return (NULL);
}
/*
* StrCmpNI - Compare n bytes, case insensitive
*
* returns See lstrcmpi return values.
*/
int FAR PASCAL StrCmpNIA(LPCSTR lpStr1, LPCSTR lpStr2, int nChar)
{
int i;
LPCSTR lpszEnd = lpStr1 + nChar;
for ( ; (lpszEnd > lpStr1) && (*lpStr1 || *lpStr2); (lpStr1 = AnsiNext(lpStr1)), (lpStr2 = AnsiNext(lpStr2))) {
WORD w1;
WORD w2;
// If either pointer is at the null terminator already,
// we want to copy just one byte to make sure we don't read
// past the buffer (might be at a page boundary).
w1 = (*lpStr1) ? *(UNALIGNED WORD *)lpStr1 : 0;
w2 = (UINT)(IsDBCSLeadByte(*lpStr2)) ? *(UNALIGNED WORD *)lpStr2 : (WORD)(BYTE)(*lpStr2);
i = ChrCmpIA(w1, w2);
if (i)
return i;
}
return 0;
}
/*
* ANSiStrStrI - Search for first occurrence of a substring, case insensitive
*
* Assumes lpFirst points to source string
* lpSrch points to string to search for
* returns first occurrence of string if successful; NULL otherwise
*/
LPSTR FAR PASCAL ANSIStrStrI(LPCSTR lpFirst, LPCSTR lpSrch)
{
UINT uLen;
WORD wMatch;
uLen = (UINT)lstrlenA(lpSrch);
wMatch = *(UNALIGNED WORD FAR *)lpSrch;
for ( ; (lpFirst = ANSIStrChrI(lpFirst, wMatch)) != 0 && StrCmpNIA(lpFirst, lpSrch, uLen);
lpFirst=AnsiNext(lpFirst))
continue; /* continue until we hit the end of the string or get a match */
return((LPSTR)lpFirst);
}