Fix formatting
Immprovements by hand + rustfmt
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83b5971045
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1724a54536
@ -473,7 +473,9 @@ pub struct DirIter<'a, T: ReadWriteSeek + 'a> {
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impl<'a, T: ReadWriteSeek> DirIter<'a, T> {
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fn new(stream: DirRawStream<'a, T>, fs: &'a FileSystem<T>, skip_volume: bool) -> Self {
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DirIter {
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stream, fs, skip_volume,
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stream,
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fs,
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skip_volume,
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err: false,
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}
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}
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@ -158,8 +158,7 @@ impl DirFileEntryData {
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}
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pub(crate) fn first_cluster(&self, fat_type: FatType) -> Option<u32> {
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let first_cluster_hi =
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if fat_type == FatType::Fat32 { self.first_cluster_hi } else { 0 };
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let first_cluster_hi = if fat_type == FatType::Fat32 { self.first_cluster_hi } else { 0 };
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let n = ((first_cluster_hi as u32) << 16) | self.first_cluster_lo as u32;
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if n == 0 {
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None
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@ -305,11 +305,13 @@ impl<'a, T: ReadWriteSeek> Seek for File<'a, T> {
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SeekFrom::Current(x) => self.offset as i64 + x,
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SeekFrom::Start(x) => x as i64,
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SeekFrom::End(x) => {
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self.entry
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let size = self
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.entry
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.iter()
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.next()
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.map_or(None, |e| e.inner().size())
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.expect("cannot seek from end if size is unknown") as i64 + x
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.expect("cannot seek from end if size is unknown") as i64;
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size + x
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},
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};
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if new_pos < 0 {
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38
src/fs.rs
38
src/fs.rs
@ -176,11 +176,13 @@ impl BiosParameterBlock {
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Ok(bpb)
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}
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fn validate(&self) -> io::Result<()> {
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// sanity checks
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if self.bytes_per_sector.count_ones() != 1 {
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return Err(Error::new(ErrorKind::Other, "invalid bytes_per_sector value in BPB (not power of two)"));
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return Err(Error::new(
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ErrorKind::Other,
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"invalid bytes_per_sector value in BPB (not power of two)",
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));
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} else if self.bytes_per_sector < 512 {
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return Err(Error::new(ErrorKind::Other, "invalid bytes_per_sector value in BPB (value < 512)"));
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} else if self.bytes_per_sector > 4096 {
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@ -188,11 +190,17 @@ impl BiosParameterBlock {
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}
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if self.sectors_per_cluster.count_ones() != 1 {
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return Err(Error::new(ErrorKind::Other, "invalid sectors_per_cluster value in BPB (not power of two)"));
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return Err(Error::new(
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ErrorKind::Other,
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"invalid sectors_per_cluster value in BPB (not power of two)",
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));
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} else if self.sectors_per_cluster < 1 {
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return Err(Error::new(ErrorKind::Other, "invalid sectors_per_cluster value in BPB (value < 1)"));
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} else if self.sectors_per_cluster > 128 {
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return Err(Error::new(ErrorKind::Other, "invalid sectors_per_cluster value in BPB (value > 128)"));
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return Err(Error::new(
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ErrorKind::Other,
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"invalid sectors_per_cluster value in BPB (value > 128)",
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));
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}
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// bytes per sector is u16, sectors per cluster is u8, so guaranteed no overflow in multiplication
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@ -211,16 +219,20 @@ impl BiosParameterBlock {
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return Err(Error::new(ErrorKind::Other, "invalid reserved_sectors value in BPB"));
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} else if !self.is_fat32() && self.reserved_sectors != 1 {
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// Microsoft document indicates fat12 and fat16 code exists that presume this value is 1
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warn!("fs compatibility: reserved_sectors value '{}' in BPB is not '1', and thus is incompatible with some implementations",
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self.reserved_sectors);
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warn!(
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"fs compatibility: reserved_sectors value '{}' in BPB is not '1', and thus is incompatible with some implementations",
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self.reserved_sectors
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);
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}
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if self.fats == 0 {
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return Err(Error::new(ErrorKind::Other, "invalid fats value in BPB"));
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} else if self.fats > 2 {
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// Microsoft document indicates that few implementations support any values other than 1 or 2
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warn!("fs compatibility: numbers of FATs '{}' in BPB is greater than '2', and thus is incompatible with some implementations",
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self.fats);
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warn!(
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"fs compatibility: numbers of FATs '{}' in BPB is greater than '2', and thus is incompatible with some implementations",
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self.fats
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);
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}
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if self.fs_version != 0 {
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@ -387,13 +399,19 @@ impl FsInfoSector {
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let max_valid_cluster_number = total_clusters + RESERVED_FAT_ENTRIES;
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if let Some(n) = self.free_cluster_count {
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if n > total_clusters {
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warn!("invalid free_cluster_count ({}) in fs_info exceeds total cluster count ({})", n, total_clusters);
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warn!(
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"invalid free_cluster_count ({}) in fs_info exceeds total cluster count ({})",
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n, total_clusters
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);
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self.free_cluster_count = None;
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}
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}
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if let Some(n) = self.next_free_cluster {
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if n > max_valid_cluster_number {
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warn!("invalid free_cluster_count ({}) in fs_info exceeds maximum cluster number ({})", n, max_valid_cluster_number);
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warn!(
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"invalid free_cluster_count ({}) in fs_info exceeds maximum cluster number ({})",
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n, max_valid_cluster_number
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);
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self.next_free_cluster = None;
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}
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}
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12
src/table.rs
12
src/table.rs
@ -1,6 +1,6 @@
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use io;
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use byteorder::LittleEndian;
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use byteorder_ext::{ReadBytesExt, WriteBytesExt};
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use io;
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use fs::{FatType, FsStatusFlags, ReadSeek, ReadWriteSeek};
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@ -280,7 +280,10 @@ impl FatTrait for Fat32 {
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Ok(match val {
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0 if cluster >= 0x0FFFFFF7 && cluster <= 0x0FFFFFFF => {
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let tmp = if cluster == 0x0FFFFFF7 { "BAD_CLUSTER" } else { "end-of-chain" };
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warn!("cluster number {} is a special value in FAT to indicate {}; it should never be seen as free", cluster, tmp);
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warn!(
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"cluster number {} is a special value in FAT to indicate {}; it should never be seen as free",
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cluster, tmp
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);
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FatValue::Bad // avoid accidental use or allocation into a FAT chain
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},
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0 => FatValue::Free,
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@ -304,7 +307,10 @@ impl FatTrait for Fat32 {
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// or even have them all store value '4' as their next cluster.
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// Some believe only FatValue::Bad should be allowed for this edge case.
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let tmp = if cluster == 0x0FFFFFF7 { "BAD_CLUSTER" } else { "end-of-chain" };
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panic!("cluster number {} is a special value in FAT to indicate {}; it should never be set as free", cluster, tmp);
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panic!(
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"cluster number {} is a special value in FAT to indicate {}; it should never be set as free",
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cluster, tmp
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);
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};
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let raw_val = match value {
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FatValue::Free => 0,
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@ -39,10 +39,11 @@ fn open_filesystem_rw(tmp_path: &str) -> FileSystem {
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}
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fn call_with_fs(f: &Fn(FileSystem) -> (), filename: &str, test_seq: u32) {
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call_with_tmp_img(&|tmp_path| {
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let callback = |tmp_path: &str| {
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let fs = open_filesystem_rw(tmp_path);
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f(fs);
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}, filename, test_seq);
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};
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call_with_tmp_img(&callback, filename, test_seq);
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}
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fn test_write_short_file(fs: FileSystem) {
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