[winpr, crt] Added wcsstr implementation

(cherry picked from commit 6c034ba)
FreeRDP · Nov 14, 2022 · 0a62aba · 0a62aba
1 parent 3ac3a2c
commit 0a62aba
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Showing 2 changed files with 23 additions and 0 deletions.
diff --git a/winpr/include/winpr/string.h b/winpr/include/winpr/string.h
@@ -65,6 +65,8 @@ extern "C"
 	WINPR_API size_t _wcslen(const WCHAR* str);
 	WINPR_API size_t _wcsnlen(const WCHAR* str, size_t maxNumberOfElements);
 
+	WINPR_API WCHAR* _wcsstr(const WCHAR* str, const WCHAR* strSearch);
+
 	WINPR_API WCHAR* _wcschr(const WCHAR* str, WCHAR c);
 	WINPR_API WCHAR* _wcsrchr(const WCHAR* str, WCHAR c);
 
@@ -77,6 +79,7 @@ extern "C"
 #define _wcsncmp wcsncmp
 #define _wcslen wcslen
 #define _wcsnlen wcsnlen
+#define _wcsstr wcsstr
 #define _wcschr wcschr
 #define _wcsrchr wcsrchr
 

diff --git a/winpr/libwinpr/crt/string.c b/winpr/libwinpr/crt/string.c
@@ -164,6 +164,26 @@ size_t _wcsnlen(const WCHAR* str, size_t max)
 	return x;
 }
 
+/* _wcsstr -> wcsstr */
+
+WCHAR* _wcsstr(const WCHAR* str, const WCHAR* strSearch)
+{
+	WINPR_ASSERT(str);
+	WINPR_ASSERT(strSearch);
+
+	if (strSearch[0] == '\0')
+		return str;
+
+	const size_t searchLen = _wcslen(strSearch);
+	while (*str)
+	{
+		if (_wcsncmp(str, strSearch, searchLen) == 0)
+			return str;
+		str++;
+	}
+	return NULL;
+}
+
 /* _wcschr -> wcschr */
 
 WCHAR* _wcschr(const WCHAR* str, WCHAR c)