BNumberFormat: add Parse() and GetSymbol().

headers/os/locale/NumberFormat.h

@@ -10,10 +10,8 @@
 
 
 enum BNumberElement {
-	B_NUMBER_ELEMENT_INVALID = B_BAD_DATA,
-	B_NUMBER_ELEMENT_INTEGER = 0,
-	B_NUMBER_ELEMENT_FRACTIONAL,
-	B_NUMBER_ELEMENT_CURRENCY
+	B_DECIMAL_SEPARATOR = 10, // Values 0-9 are reserved for digit symbols
+	B_GROUPING_SEPARATOR,
 };
 
 class BNumberFormatImpl;
@@ -36,6 +34,10 @@ public:
 			status_t			FormatMonetary(BString& string,
 									const double value);
 
+			status_t			Parse(const BString& string, double& value);
+
+			BString			GetSeparator(BNumberElement element);
+
 private:
 								BNumberFormat(const BNumberFormat &other);
 

src/kits/locale/NumberFormat.cpp

@@ -2,6 +2,7 @@
  * Copyright 2003, Axel Dörfler, [email protected].
  * Copyright 2010-2011, Oliver Tappe, [email protected].
  * Copyright 2012, John Scipione, [email protected]
+ * Copyright 2017, Adrien Destugues, [email protected]
  * All rights reserved. Distributed under the terms of the MIT License.
  */
 
@@ -15,6 +16,8 @@
 
 #include <ICUWrapper.h>
 
+#include <unicode/dcfmtsym.h>
+#include <unicode/decimfmt.h>
 #include <unicode/numfmt.h>
 
 
@@ -231,3 +234,60 @@ BNumberFormat::FormatMonetary(BString& string, const double value)
 
 	return B_OK;
 }
+
+
+status_t
+BNumberFormat::Parse(const BString& string, double& value)
+{
+	NumberFormat* parser = fPrivateData->GetFloat(&fConventions);
+
+	if (parser == NULL)
+		return B_NO_MEMORY;
+
+	UnicodeString unicode(string.String());
+	Formattable result(0);
+	UErrorCode err = U_ZERO_ERROR;
+
+	parser->parse(unicode, result, err);
+
+	if (err != U_ZERO_ERROR)
+		return B_BAD_DATA;
+
+	value = result.getDouble();
+
+	return B_OK;
+}
+
+
+BString
+BNumberFormat::GetSeparator(BNumberElement element)
+{
+	DecimalFormatSymbols::ENumberFormatSymbol symbol;
+	BString result;
+
+	switch(element) {
+		case B_DECIMAL_SEPARATOR:
+			symbol = DecimalFormatSymbols::kDecimalSeparatorSymbol;
+			break;
+		case B_GROUPING_SEPARATOR:
+			symbol = DecimalFormatSymbols::kGroupingSeparatorSymbol;
+			break;
+
+		default:
+			return result;
+	}
+
+	NumberFormat* format = fPrivateData->GetFloat(&fConventions);
+	DecimalFormat* decimal = dynamic_cast<DecimalFormat*>(format);
+
+	if (decimal == NULL)
+		return result;
+
+	const DecimalFormatSymbols* symbols = decimal->getDecimalFormatSymbols();
+	UnicodeString string = symbols->getSymbol(symbol);
+
+	BStringByteSink stringConverter(&result);
+	string.toUTF8(stringConverter);
+
+	return result;
+}