UnicodeString& SimplePatternFormatter::formatAndAppend(
const UnicodeString * const *placeholderValues,
int32_t placeholderValueCount,
UnicodeString &appendTo,
int32_t *offsetArray,
int32_t offsetArrayLength,
UErrorCode &status) const {
if (U_FAILURE(status)) {
return appendTo;
}
if (isInvalidArray(placeholderValues, placeholderValueCount)
|| isInvalidArray(offsetArray, offsetArrayLength)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return appendTo;
}
if (placeholderValueCount < placeholderCount) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return appendTo;
}
// Since we are disallowing parameter values that are the same as
// appendTo, we have to check all placeholderValues as opposed to
// the first placeholderCount placeholder values.
SimplePatternFormatterPlaceholderValues values(
placeholderValues, placeholderValueCount);
if (values.isAppendToInAnyIndexExcept(appendTo, -1)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return appendTo;
}
return formatAndAppend(
values,
appendTo,
offsetArray,
offsetArrayLength);
}
UnicodeString &SimpleFormatter::formatAndReplace(
const UnicodeString *const *values, int32_t valuesLength,
UnicodeString &result,
int32_t *offsets, int32_t offsetsLength, UErrorCode &errorCode) const {
if (U_FAILURE(errorCode)) {
return result;
}
if (isInvalidArray(values, valuesLength) || isInvalidArray(offsets, offsetsLength)) {
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
return result;
}
const UChar *cp = compiledPattern.getBuffer();
int32_t cpLength = compiledPattern.length();
if (valuesLength < getArgumentLimit(cp, cpLength)) {
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
return result;
}
// If the pattern starts with an argument whose value is the same object
// as the result, then we keep the result contents and append to it.
// Otherwise we replace its contents.
int32_t firstArg = -1;
// If any non-initial argument value is the same object as the result,
// then we first copy its contents and use that instead while formatting.
UnicodeString resultCopy;
if (getArgumentLimit(cp, cpLength) > 0) {
for (int32_t i = 1; i < cpLength;) {
int32_t n = cp[i++];
if (n < ARG_NUM_LIMIT) {
if (values[n] == &result) {
if (i == 2) {
firstArg = n;
} else if (resultCopy.isEmpty() && !result.isEmpty()) {
resultCopy = result;
}
}
} else {
i += n - ARG_NUM_LIMIT;
}
}
}
if (firstArg < 0) {
result.remove();
}
return format(cp, cpLength, values,
result, &resultCopy, FALSE,
offsets, offsetsLength, errorCode);
}
UnicodeString& SimpleFormatter::formatAndAppend(
const UnicodeString *const *values, int32_t valuesLength,
UnicodeString &appendTo,
int32_t *offsets, int32_t offsetsLength, UErrorCode &errorCode) const {
if (U_FAILURE(errorCode)) {
return appendTo;
}
if (isInvalidArray(values, valuesLength) || isInvalidArray(offsets, offsetsLength) ||
valuesLength < getArgumentLimit()) {
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
return appendTo;
}
return format(compiledPattern.getBuffer(), compiledPattern.length(), values,
appendTo, NULL, TRUE,
offsets, offsetsLength, errorCode);
}
UnicodeString& SimplePatternFormatter::formatAndReplace(
const UnicodeString * const *placeholderValues,
int32_t placeholderValueCount,
UnicodeString &result,
int32_t *offsetArray,
int32_t offsetArrayLength,
UErrorCode &status) const {
if (U_FAILURE(status)) {
return result;
}
if (isInvalidArray(placeholderValues, placeholderValueCount)
|| isInvalidArray(offsetArray, offsetArrayLength)) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return result;
}
if (placeholderValueCount < placeholderCount) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return result;
}
SimplePatternFormatterPlaceholderValues values(
placeholderValues, placeholderCount);
int32_t placeholderAtStart = getUniquePlaceholderAtStart();
// If pattern starts with a unique placeholder and that placeholder
// value is result, we may be able to optimize by just appending to result.
if (placeholderAtStart >= 0
&& placeholderValues[placeholderAtStart] == &result) {
// If result is the value for other placeholders, call off optimization.
if (values.isAppendToInAnyIndexExcept(result, placeholderAtStart)) {
values.snapshotAppendTo(result);
result.remove();
return formatAndAppend(
values,
result,
offsetArray,
offsetArrayLength);
}
// Otherwise we can optimize
formatAndAppend(
values,
result,
offsetArray,
offsetArrayLength);
// We have to make the offset for the placeholderAtStart
// placeholder be 0. Otherwise it would be the length of the
// previous value of result.
if (offsetArrayLength > placeholderAtStart) {
offsetArray[placeholderAtStart] = 0;
}
return result;
}
if (values.isAppendToInAnyIndexExcept(result, -1)) {
values.snapshotAppendTo(result);
}
result.remove();
return formatAndAppend(
values,
result,
offsetArray,
offsetArrayLength);
}
