+// Replace *SearchString in **MainString with *ReplString -- but if *SearchString
+// is preceded by "%", instead remove that character.
+// Returns TRUE if replacement was done, FALSE otherwise.
+BOOLEAN ReplaceSubstring(IN OUT CHAR16 **MainString, IN CHAR16 *SearchString, IN CHAR16 *ReplString) {
+ BOOLEAN WasReplaced = FALSE;
+ CHAR16 *FoundSearchString, *NewString, *EndString;
+
+ FoundSearchString = MyStrStr(*MainString, SearchString);
+ if (FoundSearchString) {
+ NewString = AllocateZeroPool(sizeof(CHAR16) * StrLen(*MainString));
+ if (NewString) {
+ EndString = &(FoundSearchString[StrLen(SearchString)]);
+ FoundSearchString[0] = L'\0';
+ if ((FoundSearchString > *MainString) && (FoundSearchString[-1] == L'%')) {
+ FoundSearchString[-1] = L'\0';
+ ReplString = SearchString;
+ } // if
+ StrCpy(NewString, *MainString);
+ MergeStrings(&NewString, ReplString, L'\0');
+ MergeStrings(&NewString, EndString, L'\0');
+ MyFreePool(MainString);
+ *MainString = NewString;
+ WasReplaced = TRUE;
+ } // if
+ } // if
+ return WasReplaced;
+} // BOOLEAN ReplaceSubstring()
+