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https://github.com/RGBCube/uutils-coreutils
synced 2025-07-28 03:27:44 +00:00
ls: refactor out padding calculations (#3072)
* Refactor padding calculations into a function * Propagate all write and (most) flush errors
This commit is contained in:
Hanif Ariffin
GitHub
parent
c2e3f4109c
commit
45a1b7e4bb
1 changed files with 105 additions and 117 deletions
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@ -324,16 +324,16 @@ struct LongFormat {
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struct PaddingCollection {
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#[cfg(unix)]
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longest_inode_len: usize,
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longest_link_count_len: usize,
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longest_uname_len: usize,
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longest_group_len: usize,
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longest_context_len: usize,
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longest_size_len: usize,
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inode: usize,
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link_count: usize,
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uname: usize,
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group: usize,
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context: usize,
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size: usize,
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#[cfg(unix)]
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longest_major_len: usize,
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major: usize,
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#[cfg(unix)]
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longest_minor_len: usize,
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minor: usize,
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}
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impl Config {
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@ -1305,9 +1305,9 @@ only ignore '.' and '..'.",
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)
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}
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/// Represents a Path along with it's associated data
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/// Any data that will be reused several times makes sense to be added to this structure
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/// Caching data here helps eliminate redundant syscalls to fetch same information
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/// Represents a Path along with it's associated data.
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/// Any data that will be reused several times makes sense to be added to this structure.
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/// Caching data here helps eliminate redundant syscalls to fetch same information.
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#[derive(Debug)]
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struct PathData {
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// Result<MetaData> got from symlink_metadata() or metadata() based on config
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@ -1708,92 +1708,10 @@ fn display_items(items: &[PathData], config: &Config, out: &mut BufWriter<Stdout
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// option, print the security context to the left of the size column.
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if config.format == Format::Long {
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#[cfg(unix)]
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let (
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mut longest_inode_len,
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mut longest_link_count_len,
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mut longest_uname_len,
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mut longest_group_len,
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mut longest_context_len,
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mut longest_size_len,
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mut longest_major_len,
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mut longest_minor_len,
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) = (1, 1, 1, 1, 1, 1, 1, 1);
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#[cfg(not(unix))]
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let (
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mut longest_link_count_len,
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mut longest_uname_len,
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mut longest_group_len,
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mut longest_context_len,
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mut longest_size_len,
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) = (1, 1, 1, 1, 1);
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#[cfg(unix)]
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for item in items {
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let context_len = item.security_context.len();
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let (link_count_len, uname_len, group_len, size_len, major_len, minor_len, inode_len) =
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display_dir_entry_size(item, config, out);
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longest_inode_len = inode_len.max(longest_inode_len);
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longest_link_count_len = link_count_len.max(longest_link_count_len);
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longest_uname_len = uname_len.max(longest_uname_len);
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longest_group_len = group_len.max(longest_group_len);
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if config.context {
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longest_context_len = context_len.max(longest_context_len);
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}
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if items.len() == 1usize {
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longest_size_len = 0usize;
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longest_major_len = 0usize;
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longest_minor_len = 0usize;
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} else {
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longest_major_len = major_len.max(longest_major_len);
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longest_minor_len = minor_len.max(longest_minor_len);
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longest_size_len = size_len
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.max(longest_size_len)
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.max(longest_major_len + longest_minor_len + 2usize);
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}
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}
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#[cfg(not(unix))]
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for item in items {
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let context_len = item.security_context.len();
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let (
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link_count_len,
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uname_len,
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group_len,
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size_len,
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_major_len,
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_minor_len,
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_inode_len,
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) = display_dir_entry_size(item, config, out);
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longest_link_count_len = link_count_len.max(longest_link_count_len);
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longest_uname_len = uname_len.max(longest_uname_len);
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longest_group_len = group_len.max(longest_group_len);
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if config.context {
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longest_context_len = context_len.max(longest_context_len);
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}
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longest_size_len = size_len.max(longest_size_len);
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}
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let padding_collection = calculate_padding_collection(items, config, out);
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for item in items {
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display_item_long(
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item,
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&PaddingCollection {
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#[cfg(unix)]
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longest_inode_len,
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longest_link_count_len,
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longest_uname_len,
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longest_group_len,
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longest_context_len,
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longest_size_len,
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#[cfg(unix)]
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longest_major_len,
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#[cfg(unix)]
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longest_minor_len,
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},
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config,
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out,
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);
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display_item_long(item, &padding_collection, config, out);
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}
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} else {
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let mut longest_context_len = 1;
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@ -1966,11 +1884,7 @@ fn display_item_long(
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#[cfg(unix)]
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{
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if config.inode {
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let _ = write!(
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out,
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"{} ",
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pad_left(&get_inode(md), padding.longest_inode_len),
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);
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let _ = write!(out, "{} ", pad_left(&get_inode(md), padding.inode),);
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}
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}
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@ -1985,14 +1899,14 @@ fn display_item_long(
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} else {
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""
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},
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pad_left(&display_symlink_count(md), padding.longest_link_count_len),
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pad_left(&display_symlink_count(md), padding.link_count),
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);
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if config.long.owner {
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let _ = write!(
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out,
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" {}",
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pad_right(&display_uname(md, config), padding.longest_uname_len),
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pad_right(&display_uname(md, config), padding.uname),
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);
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}
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@ -2000,7 +1914,7 @@ fn display_item_long(
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let _ = write!(
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out,
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" {}",
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pad_right(&display_group(md, config), padding.longest_group_len),
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pad_right(&display_group(md, config), padding.group),
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);
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}
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@ -2008,7 +1922,7 @@ fn display_item_long(
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let _ = write!(
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out,
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" {}",
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pad_right(&item.security_context, padding.longest_context_len),
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pad_right(&item.security_context, padding.context),
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);
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}
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@ -2018,13 +1932,13 @@ fn display_item_long(
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let _ = write!(
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out,
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" {}",
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pad_right(&display_uname(md, config), padding.longest_uname_len),
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pad_right(&display_uname(md, config), padding.uname),
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);
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}
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match display_size_or_rdev(md, config) {
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SizeOrDeviceId::Size(size) => {
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let _ = write!(out, " {}", pad_left(&size, padding.longest_size_len),);
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let _ = write!(out, " {}", pad_left(&size, padding.size),);
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}
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SizeOrDeviceId::Device(major, minor) => {
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let _ = write!(
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@ -2035,10 +1949,10 @@ fn display_item_long(
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#[cfg(not(unix))]
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0usize,
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#[cfg(unix)]
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padding.longest_major_len.max(
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padding.major.max(
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padding
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.longest_size_len
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.saturating_sub(padding.longest_minor_len.saturating_add(2usize))
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.size
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.saturating_sub(padding.minor.saturating_add(2usize))
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)
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),
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pad_left(
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@ -2046,7 +1960,7 @@ fn display_item_long(
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#[cfg(not(unix))]
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0usize,
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#[cfg(unix)]
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padding.longest_minor_len,
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padding.minor,
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),
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);
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}
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@ -2060,7 +1974,7 @@ fn display_item_long(
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#[cfg(unix)]
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{
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if config.inode {
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let _ = write!(out, "{} ", pad_left("?", padding.longest_inode_len),);
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let _ = write!(out, "{} ", pad_left("?", padding.inode),);
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}
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}
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@ -2108,29 +2022,29 @@ fn display_item_long(
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} else {
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""
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},
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pad_left("?", padding.longest_link_count_len),
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pad_left("?", padding.link_count),
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);
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if config.long.owner {
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let _ = write!(out, " {}", pad_right("?", padding.longest_uname_len));
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let _ = write!(out, " {}", pad_right("?", padding.uname));
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}
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if config.long.group {
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let _ = write!(out, " {}", pad_right("?", padding.longest_group_len));
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let _ = write!(out, " {}", pad_right("?", padding.group));
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}
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if config.context {
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let _ = write!(
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out,
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" {}",
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pad_right(&item.security_context, padding.longest_context_len)
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pad_right(&item.security_context, padding.context)
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);
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}
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// Author is only different from owner on GNU/Hurd, so we reuse
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// the owner, since GNU/Hurd is not currently supported by Rust.
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if config.long.author {
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let _ = write!(out, " {}", pad_right("?", padding.longest_uname_len));
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let _ = write!(out, " {}", pad_right("?", padding.uname));
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}
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let dfn = display_file_name(item, config, None, 0, out).contents;
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@ -2139,7 +2053,7 @@ fn display_item_long(
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let _ = writeln!(
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out,
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" {} {} {}",
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pad_left("?", padding.longest_size_len),
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pad_left("?", padding.size),
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pad_left("?", date_len),
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dfn,
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);
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@ -2594,3 +2508,77 @@ fn get_security_context(config: &Config, p_buf: &Path, must_dereference: bool) -
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substitute_string
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}
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}
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#[cfg(unix)]
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fn calculate_padding_collection(
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items: &[PathData],
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config: &Config,
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out: &mut BufWriter<Stdout>,
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) -> PaddingCollection {
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let mut padding_collections = PaddingCollection {
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inode: 1,
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link_count: 1,
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uname: 1,
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group: 1,
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context: 1,
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size: 1,
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major: 1,
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minor: 1,
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};
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for item in items {
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let context_len = item.security_context.len();
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let (link_count_len, uname_len, group_len, size_len, major_len, minor_len, inode_len) =
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display_dir_entry_size(item, config, out);
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padding_collections.inode = inode_len.max(padding_collections.inode);
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padding_collections.link_count = link_count_len.max(padding_collections.link_count);
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padding_collections.uname = uname_len.max(padding_collections.uname);
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padding_collections.group = group_len.max(padding_collections.group);
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if config.context {
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padding_collections.context = context_len.max(padding_collections.context);
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}
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if items.len() == 1usize {
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padding_collections.size = 0usize;
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padding_collections.major = 0usize;
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padding_collections.minor = 0usize;
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} else {
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padding_collections.major = major_len.max(padding_collections.major);
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padding_collections.minor = minor_len.max(padding_collections.minor);
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padding_collections.size = size_len
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.max(padding_collections.size)
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.max(padding_collections.major + padding_collections.minor + 2usize);
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}
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}
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padding_collections
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}
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#[cfg(not(unix))]
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fn calculate_padding_collection(
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items: &[PathData],
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config: &Config,
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out: &mut BufWriter<Stdout>,
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) -> PaddingCollection {
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let mut padding_collections = PaddingCollection {
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link_count: 1,
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uname: 1,
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group: 1,
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context: 1,
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size: 1,
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};
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for item in items {
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let context_len = item.security_context.len();
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let (link_count_len, uname_len, group_len, size_len, _major_len, _minor_len, _inode_len) =
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display_dir_entry_size(item, config, out);
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padding_collections.link_count = link_count_len.max(padding_collections.link_count);
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padding_collections.uname = uname_len.max(padding_collections.uname);
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padding_collections.group = group_len.max(padding_collections.group);
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if config.context {
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padding_collections.context = context_len.max(padding_collections.context);
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}
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padding_collections.size = size_len.max(padding_collections.size);
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}
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padding_collections
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}
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