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package reftable
import "fmt"
// readUint24 reads a 24-bit big-endian unsigned integer.
func readUint24(b []byte) uint32 {
return uint32(b[0])<<16 | uint32(b[1])<<8 | uint32(b[2])
}
// alignUp rounds pos up to the next multiple of blockSize.
func alignUp(pos, blockSize int) int {
rem := pos % blockSize
if rem == 0 {
return pos
}
return pos + (blockSize - rem)
}
// readVarint decodes one reftable/ofs-delta style varint.
func readVarint(buf []byte, off, end int) (uint64, int, error) {
if off >= end {
return 0, 0, fmt.Errorf("unexpected EOF")
}
b := buf[off]
val := uint64(b & 0x7f)
off++
for b&0x80 != 0 {
if off >= end {
return 0, 0, fmt.Errorf("unexpected EOF")
}
b = buf[off]
off++
val = ((val + 1) << 7) | uint64(b&0x7f)
}
return val, off, nil
}
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