diff options
Diffstat (limited to 'source/blender/functions/FN_generic_span.hh')
-rw-r--r-- | source/blender/functions/FN_generic_span.hh | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/source/blender/functions/FN_generic_span.hh b/source/blender/functions/FN_generic_span.hh index 31b67dd3d70..e2c49697ba9 100644 --- a/source/blender/functions/FN_generic_span.hh +++ b/source/blender/functions/FN_generic_span.hh @@ -30,7 +30,7 @@ namespace blender::fn { * A generic span. It behaves just like a blender::Span<T>, but the type is only known at run-time. */ class GSpan { - private: + protected: const CPPType *type_; const void *data_; int64_t size_; @@ -85,6 +85,14 @@ class GSpan { BLI_assert(type_->is<T>()); return Span<T>(static_cast<const T *>(data_), size_); } + + GSpan slice(const int64_t start, int64_t size) const + { + BLI_assert(start >= 0); + BLI_assert(size >= 0); + const int64_t new_size = std::max<int64_t>(0, std::min(size, size_ - start)); + return GSpan(*type_, POINTER_OFFSET(data_, type_->size() * start), new_size); + } }; /** @@ -92,7 +100,7 @@ class GSpan { * known at run-time. */ class GMutableSpan { - private: + protected: const CPPType *type_; void *data_; int64_t size_; @@ -153,6 +161,14 @@ class GMutableSpan { BLI_assert(type_->is<T>()); return MutableSpan<T>(static_cast<T *>(data_), size_); } + + GMutableSpan slice(const int64_t start, int64_t size) const + { + BLI_assert(start >= 0); + BLI_assert(size >= 0); + const int64_t new_size = std::max<int64_t>(0, std::min(size, size_ - start)); + return GMutableSpan(*type_, POINTER_OFFSET(data_, type_->size() * start), new_size); + } }; } // namespace blender::fn |