ZSTD_getFrameHeader
ZSTDLIB_STATIC_API size_t ZSTD_getFrameHeader(ZSTD_FrameHeader* zfhPtr, const void* src, size_t srcSize);
size_t const hError = ZSTD_getFrameHeader(&zfp, src, srcSize);
size_t const err = ZSTD_getFrameHeader(&zfh, src, srcSize);
if (ZSTD_getFrameHeader(&zfh, src, srcSize) != 0)
FORWARD_IF_ERROR(ZSTD_getFrameHeader(&zfh, src, srcSize), "");
return ZSTD_getFrameHeader(header, src, src_size);