Fp::serialize() supports IoSerializeHexStr

include/mcl/fp.hpp

@@ -238,12 +238,16 @@ public:
 	{
 		bool isMinus = false;
 		*pb = false;
-		if (ioMode & (IoArray | IoArrayRaw | IoSerialize)) {
+		if (ioMode & (IoArray | IoArrayRaw | IoSerialize | IoSerializeHexStr)) {
 			const size_t n = getByteSize();
 			v_[op_.N - 1] = 0;
-			if (cybozu::readSome(v_, n, is) != n) {
-				return;
+			size_t readSize;
+			if (ioMode & IoSerializeHexStr) {
+				readSize = mcl::fp::readHexStr(v_, n, is);
+			} else {
+				readSize = cybozu::readSome(v_, n, is);
 			}
+			if (readSize != n) return;
 		} else {
 			char buf[1024];
 			size_t n = fp::local::loadWord(buf, sizeof(buf), is);
@@ -267,14 +271,18 @@ public:
 	void save(bool *pb, OutputStream& os, int ioMode) const
 	{
 		const size_t n = getByteSize();
-		if (ioMode & (IoArray | IoArrayRaw | IoSerialize)) {
+		if (ioMode & (IoArray | IoArrayRaw | IoSerialize | IoSerializeHexStr)) {
 			if (ioMode & IoArrayRaw) {
 				cybozu::write(pb, os, v_, n);
 			} else {
 				fp::Block b;
 				getBlock(b);
+				if (ioMode & IoSerializeHexStr) {
+					*pb = mcl::fp::writeHexStr(os, b.p, n);
+				} else {
 					cybozu::write(pb, os, b.p, n);
 				}
+			}
 			return;
 		}
 		fp::Block b;

test/fp_test.cpp

@@ -768,6 +768,24 @@ CYBOZU_TEST_AUTO(getArray)
 	}
 }
 
+void serializeTest()
+{
+	const char *tbl[] = { "0", "-1", "123" };
+	for (size_t i = 0; i < CYBOZU_NUM_OF_ARRAY(tbl); i++) {
+		char buf[1024];
+		Fp x, y;
+		x.setStr(tbl[i]);
+		size_t n = x.serialize(buf, sizeof(buf));
+		CYBOZU_TEST_EQUAL(n, Fp::getByteSize());
+		y.deserialize(buf, n);
+		CYBOZU_TEST_EQUAL(x, y);
+
+		n = x.serialize(buf, sizeof(buf), mcl::IoSerializeHexStr);
+		CYBOZU_TEST_EQUAL(n, Fp::getByteSize() * 2);
+		y.deserialize(buf, n, mcl::IoSerializeHexStr);
+		CYBOZU_TEST_EQUAL(x, y);
+	}
+}
 
 #include <iostream>
 #if (defined(MCL_USE_LLVM) || defined(MCL_USE_XBYAK)) && (MCL_MAX_BIT_SIZE >= 521)
@@ -877,6 +895,7 @@ void sub(mcl::fp::Mode mode)
 		divBy2Test();
 		getStrTest();
 		setHashOfTest();
+		serializeTest();
 	}
 	anotherFpTest(mode);
 	setArrayTest2(mode);