Function zstd_safe::decompression_margin

pub fn decompression_margin(compressed_data: &[u8]) -> Result<usize, ErrorCode>

Available on crate feature experimental only.

Returns the minimum extra space when output and input buffer overlap.

When using in-place decompression, the output buffer must be at least this much bigger (in bytes) than the input buffer. The extra space must be at the front of the output buffer (the input buffer must be at the end of the output buffer).