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better error messages

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This commit is contained in:
Rob Walker
2018-08-10 12:13:27 -07:00
parent 546a1e90d5
commit 35de159d00
1 changed files with 7 additions and 3 deletions
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10
src/ledger.rs
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@@ -121,7 +121,7 @@ pub fn verify_ledger(ledger_path: &str) -> io::Result<()> {
if index_len % SIZEOF_U64 != 0 {
Err(io::Error::new(
io::ErrorKind::Other,
"expected back-to-back entries",
format!("index is not a multiple of {} bytes long", SIZEOF_U64),
))?;
}
let mut index = BufReader::with_capacity((WINDOW_SIZE * SIZEOF_U64) as usize, index);
@@ -133,6 +133,7 @@ pub fn verify_ledger(ledger_path: &str) -> io::Result<()> {
let mut index_offset = 0;
let mut data_read = 0;
let mut last_len = 0;
let mut i = 0;
while index_offset < index_len {
let data_offset = u64_at(&mut index, index_offset)?;
@@ -140,8 +141,10 @@ pub fn verify_ledger(ledger_path: &str) -> io::Result<()> {
if last_data_offset + last_len != data_offset {
Err(io::Error::new(
io::ErrorKind::Other,
format!("expected back-to-back entries... entry[{}] has a gap of {} bytes to the previous entry",
index_offset/SIZEOF_U64, data_offset as i64 - (last_data_offset as i64 + last_len as i64))
format!(
"at entry[{}], a gap or an overlap last_offset {} offset {} last_len {}",
i, last_data_offset, data_offset, last_len
),
))?;
}
@@ -163,6 +166,7 @@ pub fn verify_ledger(ledger_path: &str) -> io::Result<()> {
last_data_offset = data_offset;
data_read += last_len;
index_offset += SIZEOF_U64;
i += 1;
}
let data = data.into_inner();
if data_read != data.metadata()?.len() {