Clarification in `pgen_spec`: what bytes goes into "variant record length" in PGEN header?

[Benjamin Chu]

Hello again,

In example 2.2.6, what are the bytes for 37636-168707? All I could infer is that each variant requires 2 bytes to store, so given 2^16 variants, we need to reserve 2*2^16 = 131072 bytes, starting from byte 37636.

But what should those 131072 bytes be?

[Christopher Chang]

“variant record byte lengths”

So if the body of variant record #0 occupies 200 bytes, and the body of variant record #1 occupies 400 bytes, bytes 37636-37639 are 0xc8 0x00 0x90 0x01.

[Benjamin Chu]

Ah, got it. Thank you again.