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use super::compare_bytes;
#[derive(Debug, Eq, PartialEq)]
enum DocType {
Text,
Spreadsheet,
Presentation,
}
pub fn is_odt(buf: &[u8]) -> bool {
odf(buf) == Some(DocType::Text)
}
pub fn is_ods(buf: &[u8]) -> bool {
odf(buf) == Some(DocType::Spreadsheet)
}
pub fn is_odp(buf: &[u8]) -> bool {
odf(buf) == Some(DocType::Presentation)
}
fn odf(buf: &[u8]) -> Option<DocType> {
let signature = [b'P', b'K', 0x03, 0x04];
if !compare_bytes(buf, &signature, 0) {
return None;
}
if !compare_bytes(buf, b"mimetype", 0x1E) {
return None;
}
if compare_bytes(buf, b"vnd.oasis.opendocument.text", 0x32) {
return Some(DocType::Text);
}
if compare_bytes(buf, b"vnd.oasis.opendocument.spreadsheet", 0x32) {
return Some(DocType::Spreadsheet);
}
if compare_bytes(buf, b"vnd.oasis.opendocument.presentation", 0x32) {
return Some(DocType::Presentation);
}
None
}