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#[repr(C)]
#[derive(Default)]
pub struct METADATA_HEADER {
pub signature: u32,
pub major_version: u16,
pub minor_version: u16,
pub reserved: u32,
pub length: u32,
pub version: [u8; 20],
pub flags: u16,
pub streams: u16,
}
pub const METADATA_SIGNATURE: u32 = 0x424A_5342;
/// A coded index (see codes.rs) is a table index that may refer to different tables. The size of the column in memory
/// must therefore be large enough to hold an index for a row in the largest possible table. This function determines
/// this size for the given winmd file.
pub fn coded_index_size(tables: &[usize]) -> usize {
fn small(row_count: usize, bits: u8) -> bool {
(row_count as u64) < (1u64 << (16 - bits))
}
fn bits_needed(value: usize) -> u8 {
let mut value = value - 1;
let mut bits: u8 = 1;
while {
value >>= 1;
value != 0
} {
bits += 1;
}
bits
}
let bits_needed = bits_needed(tables.len());
if tables.iter().all(|table| small(*table, bits_needed)) {
2
} else {
4
}
}
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