Allow c_data() to return zero byte buffer.

kevinbackhouse · neheb · commit 96d0e5faf196 · 2023-06-18T13:35:04.000+03:00
diff --git a/src/types.cpp b/src/types.cpp
@@ -176,7 +176,7 @@ const byte* Exiv2::DataBuf::c_data(size_t offset) const {
   if (pData_.empty()) {
     return nullptr;
   }
-  if (offset >= pData_.size()) {
+  if (offset > pData_.size()) {
     throw std::out_of_range("Overflow in Exiv2::DataBuf::c_data");
   }
   return &pData_[offset];

Original file line number	Diff line number	Diff line change
`@@ -176,7 +176,7 @@ const byte* Exiv2::DataBuf::c_data(size_t offset) const {`
`176`	`176`	`if (pData_.empty()) {`
`177`	`177`	`return nullptr;`
`178`	`178`	`}`
`179`		`- if (offset >= pData_.size()) {`
	`179`	`+ if (offset > pData_.size()) {`
`180`	`180`	`throw std::out_of_range("Overflow in Exiv2::DataBuf::c_data");`
`181`	`181`	`}`
`182`	`182`	`return &pData_[offset];`