Function zstd_sys::ZSTD_decompressBound

pub unsafe extern "C" fn ZSTD_decompressBound(
    src: *const c_void,
    srcSize: usize,
) -> c_ulonglong

ZSTD_decompressBound() : src should point to the start of a series of ZSTD encoded and/or skippable frames srcSize must be the exact size of this series (i.e. there should be a frame boundary at src + srcSize) @return : - upper-bound for the decompressed size of all data in all successive frames - if an error occurred: ZSTD_CONTENTSIZE_ERROR

note 1 : an error can occur if src contains an invalid or incorrectly formatted frame. note 2 : the upper-bound is exact when the decompressed size field is available in every ZSTD encoded frame of src. in this case, ZSTD_findDecompressedSize and ZSTD_decompressBound return the same value. note 3 : when the decompressed size field isn’t available, the upper-bound for that frame is calculated by: upper-bound = # blocks * min(128 KB, Window_Size)