More tests for DataBuf read/write functions

src/types.cpp

@@ -110,63 +110,63 @@ void DataBuf::reset() {
 
 uint8_t Exiv2::DataBuf::read_uint8(size_t offset) const {
   if (offset >= pData_.size()) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::read_uint8");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::read_uint8");
   }
   return pData_[offset];
 }
 
 void Exiv2::DataBuf::write_uint8(size_t offset, uint8_t x) {
   if (offset >= pData_.size()) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::write_uint8");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::write_uint8");
   }
   pData_[offset] = x;
 }
 
 uint16_t Exiv2::DataBuf::read_uint16(size_t offset, ByteOrder byteOrder) const {
   if (pData_.size() < 2 || offset > (pData_.size() - 2)) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::read_uint16");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::read_uint16");
   }
   return getUShort(&pData_[offset], byteOrder);
 }
 
 void Exiv2::DataBuf::write_uint16(size_t offset, uint16_t x, ByteOrder byteOrder) {
   if (pData_.size() < 2 || offset > (pData_.size() - 2)) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::write_uint16");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::write_uint16");
   }
   us2Data(&pData_[offset], x, byteOrder);
 }
 
 uint32_t Exiv2::DataBuf::read_uint32(size_t offset, ByteOrder byteOrder) const {
   if (pData_.size() < 4 || offset > (pData_.size() - 4)) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::read_uint32");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::read_uint32");
   }
   return getULong(&pData_[offset], byteOrder);
 }
 
 void Exiv2::DataBuf::write_uint32(size_t offset, uint32_t x, ByteOrder byteOrder) {
   if (pData_.size() < 4 || offset > (pData_.size() - 4)) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::write_uint32");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::write_uint32");
   }
   ul2Data(&pData_[offset], x, byteOrder);
 }
 
 uint64_t Exiv2::DataBuf::read_uint64(size_t offset, ByteOrder byteOrder) const {
   if (pData_.size() < 8 || offset > (pData_.size() - 8)) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::read_uint64");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::read_uint64");
   }
   return getULongLong(&pData_[offset], byteOrder);
 }
 
 void Exiv2::DataBuf::write_uint64(size_t offset, uint64_t x, ByteOrder byteOrder) {
   if (pData_.size() < 8 || offset > (pData_.size() - 8)) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::write_uint64");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::write_uint64");
   }
   ull2Data(&pData_[offset], x, byteOrder);
 }
 
 int Exiv2::DataBuf::cmpBytes(size_t offset, const void* buf, size_t bufsize) const {
   if (pData_.size() < bufsize || offset > pData_.size() - bufsize) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::cmpBytes");
+    throw std::out_of_range("Overflow in Exiv2::DataBuf::cmpBytes");
   }
   return memcmp(&pData_[offset], buf, bufsize);
 }

unitTests/test_types.cpp

@@ -52,6 +52,49 @@ TEST(DataBuf, tryingToAccessTooFarElementThrows) {
   ASSERT_THROW([[maybe_unused]] auto d = instance.c_data(4), std::out_of_range);
 }
 
+TEST(DataBuf, read_uintFunctionsWorksOnExistingData) {
+  const std::array<byte, 8> data{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
+  DataBuf instance(data.data(), data.size());
+  ASSERT_EQ(data[0], instance.read_uint8(0));
+  ASSERT_EQ(data[1], instance.read_uint16(0, bigEndian));
+  ASSERT_EQ(0x00010203, instance.read_uint32(0, bigEndian));
+  ASSERT_EQ(0x0001020304050607, instance.read_uint64(0, bigEndian));
+}
+
+TEST(DataBuf, read_uintFunctionsThrowsOnTooFarElements) {
+  const std::array<byte, 8> data{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
+  DataBuf instance(data.data(), data.size());
+  ASSERT_THROW([[maybe_unused]] auto d = instance.read_uint8(data.size()), std::out_of_range);
+  ASSERT_THROW([[maybe_unused]] auto d = instance.read_uint16(data.size(), bigEndian), std::out_of_range);
+  ASSERT_THROW([[maybe_unused]] auto d = instance.read_uint32(data.size(), bigEndian), std::out_of_range);
+  ASSERT_THROW([[maybe_unused]] auto d = instance.read_uint64(data.size(), bigEndian), std::out_of_range);
+}
+
+TEST(DataBuf, write_uintFunctionsWorksWhenThereIsEnoughData) {
+  DataBuf instance(8);
+  std::uint64_t val{0x0102030405060708};
+  ASSERT_NO_THROW(instance.write_uint8(0, (val >> 56)));
+  ASSERT_EQ(0x01, instance.read_uint8(0));
+
+  ASSERT_NO_THROW(instance.write_uint16(0, (val >> 48), bigEndian));
+  ASSERT_EQ(0x0102, instance.read_uint16(0, bigEndian));
+
+  ASSERT_NO_THROW(instance.write_uint32(0, (val >> 32), bigEndian));
+  ASSERT_EQ(0x01020304, instance.read_uint32(0, bigEndian));
+
+  ASSERT_NO_THROW(instance.write_uint64(0, val, bigEndian));
+  ASSERT_EQ(val, instance.read_uint64(0, bigEndian));
+}
+
+TEST(DataBuf, write_uintFunctionsThrowsIfTryingToWriteOutOfBounds) {
+  DataBuf instance(8);
+  std::uint64_t val{0x0102030405060708};
+  ASSERT_THROW(instance.write_uint8(8, (val >> 56)), std::out_of_range);
+  ASSERT_THROW(instance.write_uint16(7, (val >> 48), bigEndian), std::out_of_range);
+  ASSERT_THROW(instance.write_uint32(5, (val >> 32), bigEndian), std::out_of_range);
+  ASSERT_THROW(instance.write_uint64(1, (val >> 32), bigEndian), std::out_of_range);
+}
+
 // Test methods like DataBuf::read_uint32 and DataBuf::write_uint32.
 TEST(DataBuf, read_write_endianess) {
   DataBuf buf(4 + 1 + 2 + 4 + 8);