Memmove
memmove is a C standard-library function that copies a specified number of bytes between memory regions while correctly handling overlap.
Modern C
memmove is a C standard library function that copies bytes between memory regions while permitting the regions to overlap.
- How it is used
- Handles overlapping memory rearrangement, especially while relocating chunks during circular-buffer resizing.
- How deep it goes
- Explains the overlap rule and demonstrates selection against memcpy, but defers the function's implementation internals.
- Examples
- Uses a wrapped circular-buffer chunk moved upward with memmove after reallocating storage.
- What you can do after
- Apply it via the C standard library when source and destination memory regions may overlap.
Modern C, Third Edition
memmove is a C standard-library function that copies bytes between memory regions while correctly handling overlap between the regions.
- How it is used
- Handles overlapping byte shifts while resizing and rearranging a circular buffer.
- How deep it goes
- Distinguishes memmove from memcpy through a worked buffer-resize case, without detailing either function’s internal algorithm.
- Examples
- Uses an upper circular-buffer chunk moved toward a new allocation end with memmove.
- What you can do after
- Apply via the C standard library when source and destination ranges may overlap.
Related concepts
- memcpycontrasts with · memcpy is a C standard-library function that copies a specified number of bytes from one nonoverlapping memory region to another.
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