void
NFRuleSet::format(double number, UnicodeString& toAppendTo, int32_t pos, UErrorCode& status) const
{
NFRule *rule = findDoubleRule(number);
if (rule) { // else error, but can't report it
NFRuleSet* ncThis = (NFRuleSet*)this;
if (ncThis->fRecursionCount++ >= RECURSION_LIMIT) {
// stop recursion
ncThis->fRecursionCount = 0;
} else {
rule->doFormat(number, toAppendTo, pos, status);
ncThis->fRecursionCount--;
}
}
}
/**
* If this is a >>> substitution, match only against ruleToUse.
* Otherwise, use the superclass function.
* @param text The string to parse
* @param parsePosition Ignored on entry, updated on exit to point to
* the first unmatched character.
* @param baseValue The partial parse result prior to calling this
* routine.
*/
UBool
ModulusSubstitution::doParse(const UnicodeString& text,
ParsePosition& parsePosition,
double baseValue,
double upperBound,
UBool lenientParse,
Formattable& result) const
{
// if this isn't a >>> substitution, we can just use the
// inherited parse() routine to do the parsing
if (ruleToUse == NULL) {
return NFSubstitution::doParse(text, parsePosition, baseValue, upperBound, lenientParse, result);
// but if it IS a >>> substitution, we have to do it here: we
// use the specific rule's doParse() method, and then we have to
// do some of the other work of NFRuleSet.parse()
} else {
ruleToUse->doParse(text, parsePosition, FALSE, upperBound, result);
if (parsePosition.getIndex() != 0) {
UErrorCode status = U_ZERO_ERROR;
double tempResult = result.getDouble(status);
tempResult = composeRuleValue(tempResult, baseValue);
result.setDouble(tempResult);
}
return TRUE;
}
}
void
NFRuleSet::setDecimalFormatSymbols(const DecimalFormatSymbols &newSymbols, UErrorCode& status) {
for (uint32_t i = 0; i < rules.size(); ++i) {
rules[i]->setDecimalFormatSymbols(newSymbols, status);
}
// Switch the fraction rules to mirror the DecimalFormatSymbols.
for (int32_t nonNumericalIdx = IMPROPER_FRACTION_RULE_INDEX; nonNumericalIdx <= MASTER_RULE_INDEX; nonNumericalIdx++) {
if (nonNumericalRules[nonNumericalIdx]) {
for (uint32_t fIdx = 0; fIdx < fractionRules.size(); fIdx++) {
NFRule *fractionRule = fractionRules[fIdx];
if (nonNumericalRules[nonNumericalIdx]->getBaseValue() == fractionRule->getBaseValue()) {
setBestFractionRule(nonNumericalIdx, fractionRule, FALSE);
}
}
}
}
for (uint32_t nnrIdx = 0; nnrIdx < NON_NUMERICAL_RULE_LENGTH; nnrIdx++) {
NFRule *rule = nonNumericalRules[nnrIdx];
if (rule) {
rule->setDecimalFormatSymbols(newSymbols, status);
}
}
}
/**
* If this is a >>> substitution, use ruleToUse to fill in
* the substitution. Otherwise, just use the superclass function.
* @param number The number being formatted
* @toInsertInto The string to insert the result of this substitution
* into
* @param pos The position of the rule text in toInsertInto
*/
void
ModulusSubstitution::doSubstitution(int64_t number, UnicodeString& toInsertInto, int32_t _pos) const
{
// if this isn't a >>> substitution, just use the inherited version
// of this function (which uses either a rule set or a DecimalFormat
// to format its substitution value)
if (ruleToUse == NULL) {
NFSubstitution::doSubstitution(number, toInsertInto, _pos);
// a >>> substitution goes straight to a particular rule to
// format the substitution value
} else {
int64_t numberToFormat = transformNumber(number);
ruleToUse->doFormat(numberToFormat, toInsertInto, _pos + getPos());
}
}
void
NFRuleSet::appendRules(UnicodeString& result) const
{
uint32_t i;
// the rule set name goes first...
result.append(name);
result.append(gColon);
result.append(gLineFeed);
// followed by the regular rules...
for (i = 0; i < rules.size(); i++) {
rules[i]->_appendRuleText(result);
result.append(gLineFeed);
}
// followed by the special rules (if they exist)
for (i = 0; i < NON_NUMERICAL_RULE_LENGTH; ++i) {
NFRule *rule = nonNumericalRules[i];
if (nonNumericalRules[i]) {
if (rule->getBaseValue() == NFRule::kImproperFractionRule
|| rule->getBaseValue() == NFRule::kProperFractionRule
|| rule->getBaseValue() == NFRule::kMasterRule)
{
for (uint32_t fIdx = 0; fIdx < fractionRules.size(); fIdx++) {
NFRule *fractionRule = fractionRules[fIdx];
if (fractionRule->getBaseValue() == rule->getBaseValue()) {
fractionRule->_appendRuleText(result);
result.append(gLineFeed);
}
}
}
else {
rule->_appendRuleText(result);
result.append(gLineFeed);
}
}
}
}
NFRule *
NFRuleSet::findNormalRule(int64_t number) const
{
// if this is a fraction rule set, use findFractionRuleSetRule()
// to find the rule (we should only go into this clause if the
// value is 0)
if (fIsFractionRuleSet) {
return findFractionRuleSetRule((double)number);
}
// if the number is negative, return the negative-number rule
// (if there isn't one, pretend the number is positive)
if (number < 0) {
if (negativeNumberRule) {
return negativeNumberRule;
} else {
number = -number;
}
}
// we have to repeat the preceding two checks, even though we
// do them in findRule(), because the version of format() that
// takes a long bypasses findRule() and goes straight to this
// function. This function does skip the fraction rules since
// we know the value is an integer (it also skips the master
// rule, since it's considered a fraction rule. Skipping the
// master rule in this function is also how we avoid infinite
// recursion)
// {dlf} unfortunately this fails if there are no rules except
// special rules. If there are no rules, use the master rule.
// binary-search the rule list for the applicable rule
// (a rule is used for all values from its base value to
// the next rule's base value)
int32_t hi = rules.size();
if (hi > 0) {
int32_t lo = 0;
while (lo < hi) {
int32_t mid = (lo + hi) / 2;
if (rules[mid]->getBaseValue() == number) {
return rules[mid];
}
else if (rules[mid]->getBaseValue() > number) {
hi = mid;
}
else {
lo = mid + 1;
}
}
if (hi == 0) { // bad rule set, minimum base > 0
return NULL; // want to throw exception here
}
NFRule *result = rules[hi - 1];
// use shouldRollBack() to see whether we need to invoke the
// rollback rule (see shouldRollBack()'s documentation for
// an explanation of the rollback rule). If we do, roll back
// one rule and return that one instead of the one we'd normally
// return
if (result->shouldRollBack((double)number)) {
if (hi == 1) { // bad rule set, no prior rule to rollback to from this base
return NULL;
}
result = rules[hi - 2];
}
return result;
}
// else use the master rule
return fractionRules[2];
}
void
NFRuleSet::parseRules(UnicodeString& description, const RuleBasedNumberFormat* owner, UErrorCode& status)
{
// start by creating a Vector whose elements are Strings containing
// the descriptions of the rules (one rule per element). The rules
// are separated by semicolons (there's no escape facility: ALL
// semicolons are rule delimiters)
if (U_FAILURE(status)) {
return;
}
// ensure we are starting with an empty rule list
rules.deleteAll();
// dlf - the original code kept a separate description array for no reason,
// so I got rid of it. The loop was too complex so I simplified it.
UnicodeString currentDescription;
int32_t oldP = 0;
while (oldP < description.length()) {
int32_t p = description.indexOf(gSemicolon, oldP);
if (p == -1) {
p = description.length();
}
currentDescription.setTo(description, oldP, p - oldP);
NFRule::makeRules(currentDescription, this, rules.last(), owner, rules, status);
oldP = p + 1;
}
// for rules that didn't specify a base value, their base values
// were initialized to 0. Make another pass through the list and
// set all those rules' base values. We also remove any special
// rules from the list and put them into their own member variables
int64_t defaultBaseValue = 0;
// (this isn't a for loop because we might be deleting items from
// the vector-- we want to make sure we only increment i when
// we _didn't_ delete aything from the vector)
uint32_t i = 0;
while (i < rules.size()) {
NFRule* rule = rules[i];
switch (rule->getType()) {
// if the rule's base value is 0, fill in a default
// base value (this will be 1 plus the preceding
// rule's base value for regular rule sets, and the
// same as the preceding rule's base value in fraction
// rule sets)
case NFRule::kNoBase:
rule->setBaseValue(defaultBaseValue, status);
if (!isFractionRuleSet()) {
++defaultBaseValue;
}
++i;
break;
// if it's the negative-number rule, copy it into its own
// data member and delete it from the list
case NFRule::kNegativeNumberRule:
if (negativeNumberRule) {
delete negativeNumberRule;
}
negativeNumberRule = rules.remove(i);
break;
// if it's the improper fraction rule, copy it into the
// correct element of fractionRules
case NFRule::kImproperFractionRule:
if (fractionRules[0]) {
delete fractionRules[0];
}
fractionRules[0] = rules.remove(i);
break;
// if it's the proper fraction rule, copy it into the
// correct element of fractionRules
case NFRule::kProperFractionRule:
if (fractionRules[1]) {
delete fractionRules[1];
}
fractionRules[1] = rules.remove(i);
break;
// if it's the master rule, copy it into the
// correct element of fractionRules
case NFRule::kMasterRule:
if (fractionRules[2]) {
delete fractionRules[2];
}
fractionRules[2] = rules.remove(i);
break;
// if it's a regular rule that already knows its base value,
// check to make sure the rules are in order, and update
// the default base value for the next rule
default:
if (rule->getBaseValue() < defaultBaseValue) {
// throw new IllegalArgumentException("Rules are not in order");
status = U_PARSE_ERROR;
return;
}
defaultBaseValue = rule->getBaseValue();
if (!isFractionRuleSet()) {
++defaultBaseValue;
}
++i;
break;
}
}
}
