int t4p::FinderClass::ReplaceAllMatches(UnicodeString& text) const {
int matches = 0;
// no check for ReplaceExpression.isEmpty() allow for empty replacements
// this allows the user to 'delete' parts of a strin
if (IsPrepared) {
UnicodeString replacement = ReplaceExpression;
RegexMatcher* matcher = NULL;
UErrorCode error = U_ZERO_ERROR;
UnicodeString dest(text.length(), ' ', 0);
int32_t pos = 0;
if (EXACT == Mode || (REGULAR_EXPRESSION == Mode && ReplaceExpression.isEmpty())) {
pos = text.indexOf(Expression, 0);
while (pos >= 0) {
text.replaceBetween(pos, pos + Expression.length(), replacement);
pos = text.indexOf(Expression, pos + replacement.length());
++matches;
}
} else {
matcher = Pattern->matcher(text, error);
if (U_SUCCESS(error) && matcher) {
while (matcher->find()) {
if (U_SUCCESS(error)) {
matcher->appendReplacement(dest, replacement, error);
if (U_SUCCESS(error)) {
++matches;
}
}
}
matcher->appendTail(dest);
text = dest;
}
}
if (matcher) {
delete matcher;
}
}
return matches;
}
