[PATCH] reg.exe: comparing the names of registry keys
Mieczyslaw Nalewaj
namiltd at poczta.onet.pl
Thu Oct 4 01:03:04 CDT 2012
Comparing the names of registry keys - patch.
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diff --git a/programs/reg/reg.c b/programs/reg/reg.c
index 1b46661..29c70a6 100644
--- a/programs/reg/reg.c
+++ b/programs/reg/reg.c
@@ -67,6 +67,24 @@ static int reg_message(int msg)
return reg_printfW(formatW, msg_buffer);
}
+static BOOL strings_equal(LPWSTR lpString1, const WCHAR *lpString2)
+{
+ int cchCount;
+ if ((!lpString1 || !*lpString1) && (!lpString2 || !*lpString2)) /* both empty */
+ return TRUE;
+ if ( !lpString1 || !*lpString1 || !lpString2 || !*lpString2 ) /* one empty */
+ return FALSE;
+ cchCount = strlenW(lpString2);
+ if (strlenW(lpString1)<cchCount) /* too short */
+ return FALSE;
+
+ if ( (CompareStringW(CP_ACP,NORM_IGNORECASE,lpString1,cchCount,lpString2,cchCount)==CSTR_EQUAL)
+ && ((lpString1[cchCount] == 0) || (lpString1[cchCount] == (WCHAR){'\\'})))
+ return TRUE;
+ else
+ return FALSE;
+}
+
static HKEY get_rootkey(LPWSTR key)
{
static const WCHAR szHKLM[] = {'H','K','L','M',0};
@@ -80,20 +98,15 @@ static HKEY get_rootkey(LPWSTR key)
static const WCHAR szHKCC[] = {'H','K','C','C',0};
static const WCHAR szHKEY_CURRENT_CONFIG[] = {'H','K','E','Y','_','C','U','R','R','E','N','T','_','C','O','N','F','I','G',0};
- if (CompareStringW(CP_ACP,NORM_IGNORECASE,key,4,szHKLM,4)==CSTR_EQUAL ||
- CompareStringW(CP_ACP,NORM_IGNORECASE,key,18,szHKEY_LOCAL_MACHINE,18)==CSTR_EQUAL)
+ if (strings_equal(key,szHKLM) || strings_equal(key,szHKEY_LOCAL_MACHINE))
return HKEY_LOCAL_MACHINE;
- else if (CompareStringW(CP_ACP,NORM_IGNORECASE,key,4,szHKCU,4)==CSTR_EQUAL ||
- CompareStringW(CP_ACP,NORM_IGNORECASE,key,17,szHKEY_CURRENT_USER,17)==CSTR_EQUAL)
+ else if (strings_equal(key,szHKCU) || strings_equal(key,szHKEY_CURRENT_USER))
return HKEY_CURRENT_USER;
- else if (CompareStringW(CP_ACP,NORM_IGNORECASE,key,4,szHKCR,4)==CSTR_EQUAL ||
- CompareStringW(CP_ACP,NORM_IGNORECASE,key,17,szHKEY_CLASSES_ROOT,17)==CSTR_EQUAL)
+ else if (strings_equal(key,szHKCR) || strings_equal(key,szHKEY_CLASSES_ROOT))
return HKEY_CLASSES_ROOT;
- else if (CompareStringW(CP_ACP,NORM_IGNORECASE,key,3,szHKU,3)==CSTR_EQUAL ||
- CompareStringW(CP_ACP,NORM_IGNORECASE,key,10,szHKEY_USERS,10)==CSTR_EQUAL)
+ else if (strings_equal(key,szHKU) || strings_equal(key,szHKEY_USERS))
return HKEY_USERS;
- else if (CompareStringW(CP_ACP,NORM_IGNORECASE,key,4,szHKCC,4)==CSTR_EQUAL ||
- CompareStringW(CP_ACP,NORM_IGNORECASE,key,19,szHKEY_CURRENT_CONFIG,19)==CSTR_EQUAL)
+ else if (strings_equal(key,szHKCC) || strings_equal(key,szHKEY_CURRENT_CONFIG))
return HKEY_CURRENT_CONFIG;
else return NULL;
}
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