parser: add binary support to determine_number_system and parse_size

src/uu/df/locales/en-US.ftl

@@ -7,7 +7,7 @@ df-after-help = Display values are in units of the first available SIZE from --b
 
   SIZE is an integer and optional unit (example: 10M is 10*1024*1024).
   Units are K, M, G, T, P, E, Z, Y (powers of 1024) or KB, MB,... (powers
-  of 1000).
+  of 1000). Units can be decimal, hexadecimal, octal, binary.
 
 # Help messages
 df-help-print-help = Print help information.

src/uu/df/locales/fr-FR.ftl

@@ -7,7 +7,7 @@ df-after-help = Les valeurs affichées sont en unités de la première TAILLE di
 
   TAILLE est un entier et une unité optionnelle (exemple : 10M est 10*1024*1024).
   Les unités sont K, M, G, T, P, E, Z, Y (puissances de 1024) ou KB, MB,... (puissances
-  de 1000).
+  de 1000). Les unités peuvent être décimales, hexadécimales, octales, binaires.
 
 # Messages d'aide
 df-help-print-help = afficher les informations d'aide.

src/uu/du/locales/en-US.ftl

@@ -7,7 +7,7 @@ du-after-help = Display values are in units of the first available SIZE from --b
 
   SIZE is an integer and optional unit (example: 10M is 10*1024*1024).
   Units are K, M, G, T, P, E, Z, Y (powers of 1024) or KB, MB,... (powers
-  of 1000).
+  of 1000). Units can be decimal, hexadecimal, octal, binary.
 
   PATTERN allows some advanced exclusions. For example, the following syntaxes
   are supported:

src/uu/du/locales/fr-FR.ftl

@@ -7,7 +7,7 @@ du-after-help = Les valeurs affichées sont en unités de la première TAILLE di
 
   TAILLE est un entier et une unité optionnelle (exemple : 10M est 10*1024*1024).
   Les unités sont K, M, G, T, P, E, Z, Y (puissances de 1024) ou KB, MB,... (puissances
-  de 1000).
+  de 1000). Les unités peuvent être décimales, hexadécimales, octales, binaires.
 
   MOTIF permet des exclusions avancées. Par exemple, les syntaxes suivantes
   sont supportées :

src/uucore/src/lib/features/parser/parse_size.rs

@@ -106,6 +106,7 @@ enum NumberSystem {
     Decimal,
     Octal,
     Hexadecimal,
+    Binary,
 }
 
 impl<'parser> Parser<'parser> {
@@ -134,10 +135,11 @@ impl<'parser> Parser<'parser> {
     }
     /// Parse a size string into a number of bytes.
     ///
-    /// A size string comprises an integer and an optional unit. The unit
-    /// may be K, M, G, T, P, E, Z, Y, R or Q (powers of 1024), or KB, MB,
-    /// etc. (powers of 1000), or b which is 512.
-    /// Binary prefixes can be used, too: KiB=K, MiB=M, and so on.
+    /// A size string comprises an integer and an optional unit. The integer
+    /// may be in decimal, octal (0 prefix), hexadecimal (0x prefix), or
+    /// binary (0b prefix) notation. The unit may be K, M, G, T, P, E, Z, Y,
+    /// R or Q (powers of 1024), or KB, MB, etc. (powers of 1000), or b which
+    /// is 512. Binary prefixes can be used, too: KiB=K, MiB=M, and so on.
     ///
     /// # Errors
     ///
@@ -159,6 +161,7 @@ impl<'parser> Parser<'parser> {
     /// assert_eq!(Ok(9 * 1000), parser.parse("9kB")); // kB is 1000
     /// assert_eq!(Ok(2 * 1024), parser.parse("2K")); // K is 1024
     /// assert_eq!(Ok(44251 * 1024), parser.parse("0xACDBK")); // 0xACDB is 44251 in decimal
+    /// assert_eq!(Ok(44251 * 1024 * 1024), parser.parse("0b1010110011011011")); // 0b1010110011011011 is 44251 in decimal, default M
     /// ```
     pub fn parse(&self, size: &str) -> Result<u128, ParseSizeError> {
         if size.is_empty() {
@@ -176,6 +179,11 @@ impl<'parser> Parser<'parser> {
                 .take(2)
                 .chain(size.chars().skip(2).take_while(char::is_ascii_hexdigit))
                 .collect(),
+            NumberSystem::Binary => size
+                .chars()
+                .take(2)
+                .chain(size.chars().skip(2).take_while(|c| c.is_digit(2)))
+                .collect(),
             _ => size.chars().take_while(char::is_ascii_digit).collect(),
         };
         let mut unit: &str = &size[numeric_string.len()..];
@@ -268,6 +276,10 @@ impl<'parser> Parser<'parser> {
                 let trimmed_string = numeric_string.trim_start_matches("0x");
                 Self::parse_number(trimmed_string, 16, size)?
             }
+            NumberSystem::Binary => {
+                let trimmed_string = numeric_string.trim_start_matches("0b");
+                Self::parse_number(trimmed_string, 2, size)?
+            }
         };
 
         number
@@ -328,6 +340,14 @@ impl<'parser> Parser<'parser> {
             return NumberSystem::Hexadecimal;
         }
 
+        // Binary prefix: "0b" followed by at least one binary digit (0 or 1)
+        // Note: "0b" alone is treated as decimal 0 with suffix "b"
+        if let Some(prefix) = size.strip_prefix("0b") {
+            if !prefix.is_empty() {
+                return NumberSystem::Binary;
+            }
+        }
+
         let num_digits: usize = size
             .chars()
             .take_while(char::is_ascii_digit)
@@ -363,7 +383,9 @@ impl<'parser> Parser<'parser> {
 /// assert_eq!(Ok(123), parse_size_u128("123"));
 /// assert_eq!(Ok(9 * 1000), parse_size_u128("9kB")); // kB is 1000
 /// assert_eq!(Ok(2 * 1024), parse_size_u128("2K")); // K is 1024
-/// assert_eq!(Ok(44251 * 1024), parse_size_u128("0xACDBK"));
+/// assert_eq!(Ok(44251 * 1024), parse_size_u128("0xACDBK")); // hexadecimal
+/// assert_eq!(Ok(10), parse_size_u128("0b1010")); // binary
+/// assert_eq!(Ok(10 * 1024), parse_size_u128("0b1010K")); // binary with suffix
 /// ```
 pub fn parse_size_u128(size: &str) -> Result<u128, ParseSizeError> {
     Parser::default().parse(size)
@@ -564,6 +586,7 @@ mod tests {
         assert!(parse_size_u64("1Y").is_err());
         assert!(parse_size_u64("1R").is_err());
         assert!(parse_size_u64("1Q").is_err());
+        assert!(parse_size_u64("0b1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111").is_err());
 
         assert!(variant_eq(
             &parse_size_u64("1Z").unwrap_err(),
@@ -634,6 +657,7 @@ mod tests {
     #[test]
     fn b_suffix() {
         assert_eq!(Ok(3 * 512), parse_size_u64("3b")); // b is 512
+        assert_eq!(Ok(0), parse_size_u64("0b")); // b should be used as a suffix in this case instead of signifying binary
     }
 
     #[test]
@@ -774,6 +798,12 @@ mod tests {
         assert_eq!(Ok(44251 * 1024), parse_size_u128("0xACDBK"));
     }
 
+    #[test]
+    fn parse_binary_size() {
+        assert_eq!(Ok(44251), parse_size_u64("0b1010110011011011"));
+        assert_eq!(Ok(44251 * 1024), parse_size_u64("0b1010110011011011K"));
+    }
+
     #[test]
     #[cfg(target_os = "linux")]
     fn parse_percent() {

tests/by-util/test_df.rs

@@ -648,6 +648,53 @@ fn test_block_size_with_suffix() {
     assert_eq!(get_header("1GB"), "1GB-blocks");
 }
 
+#[test]
+fn test_df_binary_block_size() {
+    fn get_header(block_size: &str) -> String {
+        let output = new_ucmd!()
+            .args(&["-B", block_size, "--output=size"])
+            .succeeds()
+            .stdout_str_lossy();
+        output.lines().next().unwrap().trim().to_string()
+    }
+
+    let test_cases = [
+        ("0b1", "1"),
+        ("0b10100", "20"),
+        ("0b1000000000", "512"),
+        ("0b10K", "2K"),
+    ];
+
+    for (binary, decimal) in test_cases {
+        let binary_result = get_header(binary);
+        let decimal_result = get_header(decimal);
+        assert_eq!(
+            binary_result, decimal_result,
+            "Binary {binary} should equal decimal {decimal}"
+        );
+    }
+}
+
+#[test]
+fn test_df_binary_env_block_size() {
+    fn get_header(env_var: &str, env_value: &str) -> String {
+        let output = new_ucmd!()
+            .env(env_var, env_value)
+            .args(&["--output=size"])
+            .succeeds()
+            .stdout_str_lossy();
+        output.lines().next().unwrap().trim().to_string()
+    }
+
+    let binary_header = get_header("DF_BLOCK_SIZE", "0b10000000000");
+    let decimal_header = get_header("DF_BLOCK_SIZE", "1024");
+    assert_eq!(binary_header, decimal_header);
+
+    let binary_header = get_header("BLOCK_SIZE", "0b10000000000");
+    let decimal_header = get_header("BLOCK_SIZE", "1024");
+    assert_eq!(binary_header, decimal_header);
+}
+
 #[test]
 fn test_block_size_in_posix_portability_mode() {
     fn get_header(block_size: &str) -> String {
@@ -849,6 +896,32 @@ fn test_invalid_block_size_suffix() {
         .stderr_contains("invalid suffix in --block-size argument '1.2'");
 }
 
+#[test]
+fn test_df_invalid_binary_size() {
+    new_ucmd!()
+        .arg("--block-size=0b123")
+        .fails()
+        .stderr_contains("invalid suffix in --block-size argument '0b123'");
+}
+
+#[test]
+fn test_df_binary_edge_cases() {
+    new_ucmd!()
+        .arg("-B0b")
+        .fails()
+        .stderr_contains("invalid --block-size argument '0b'");
+
+    new_ucmd!()
+        .arg("-B0B")
+        .fails()
+        .stderr_contains("invalid suffix in --block-size argument '0B'");
+
+    new_ucmd!()
+        .arg("--block-size=0b1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111")
+        .fails()
+        .stderr_contains("too large");
+}
+
 #[test]
 fn test_output_selects_columns() {
     let output = new_ucmd!()

tests/by-util/test_du.rs

@@ -282,6 +282,120 @@ fn test_du_env_block_size_hierarchy() {
     assert_eq!(expected, result2);
 }
 
+#[test]
+fn test_du_binary_block_size() {
+    let ts = TestScenario::new(util_name!());
+    let at = &ts.fixtures;
+    let dir = "a";
+
+    at.mkdir(dir);
+    let fpath = at.plus(format!("{dir}/file"));
+    std::fs::File::create(&fpath)
+        .expect("cannot create test file")
+        .set_len(100_000)
+        .expect("cannot set file size");
+
+    let test_cases = [
+        ("0b1", "1"),
+        ("0b10100", "20"),
+        ("0b1000000000", "512"),
+        ("0b10K", "2K"),
+    ];
+
+    for (binary, decimal) in test_cases {
+        let decimal = ts
+            .ucmd()
+            .arg(dir)
+            .arg(format!("--block-size={decimal}"))
+            .succeeds()
+            .stdout_move_str();
+
+        let binary = ts
+            .ucmd()
+            .arg(dir)
+            .arg(format!("--block-size={binary}"))
+            .succeeds()
+            .stdout_move_str();
+
+        assert_eq!(
+            decimal, binary,
+            "Binary {binary} should equal decimal {decimal}"
+        );
+    }
+}
+
+#[test]
+fn test_du_binary_env_block_size() {
+    let ts = TestScenario::new(util_name!());
+    let at = &ts.fixtures;
+    let dir = "a";
+
+    at.mkdir(dir);
+    let fpath = at.plus(format!("{dir}/file"));
+    std::fs::File::create(&fpath)
+        .expect("cannot create test file")
+        .set_len(100_000)
+        .expect("cannot set file size");
+
+    let expected = ts
+        .ucmd()
+        .arg(dir)
+        .arg("--block-size=1024")
+        .succeeds()
+        .stdout_move_str();
+
+    let result = ts
+        .ucmd()
+        .arg(dir)
+        .env("DU_BLOCK_SIZE", "0b10000000000")
+        .succeeds()
+        .stdout_move_str();
+
+    assert_eq!(expected, result);
+}
+
+#[test]
+fn test_du_invalid_binary_size() {
+    let ts = TestScenario::new(util_name!());
+
+    ts.ucmd()
+        .arg("--block-size=0b123")
+        .arg("/tmp")
+        .fails_with_code(1)
+        .stderr_only("du: invalid suffix in --block-size argument '0b123'\n");
+
+    ts.ucmd()
+        .arg("--threshold=0b123")
+        .arg("/tmp")
+        .fails_with_code(1)
+        .stderr_only("du: invalid suffix in --threshold argument '0b123'\n");
+}
+
+#[test]
+fn test_du_binary_edge_cases() {
+    let ts = TestScenario::new(util_name!());
+    let at = &ts.fixtures;
+    at.write("foo", "test");
+
+    ts.ucmd()
+        .arg("-B0b")
+        .arg("foo")
+        .fails()
+        .stderr_only("du: invalid --block-size argument '0b'\n");
+
+    ts.ucmd()
+        .arg("-B0B")
+        .arg("foo")
+        .fails()
+        .stderr_only("du: invalid suffix in --block-size argument '0B'\n");
+
+    ts.ucmd()
+        .arg("--block-size=0b1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111")
+        .arg("foo")
+        .fails_with_code(1)
+        .stderr_contains("too large");
+}
+
 #[test]
 fn test_du_non_existing_files() {
     new_ucmd!()
@@ -978,7 +1092,7 @@ fn test_du_threshold() {
     at.write("subdir/links/bigfile.txt", &"x".repeat(10000)); // ~10K file
     at.write("subdir/deeper/deeper_dir/smallfile.txt", "small"); // small file
 
-    let threshold = if cfg!(windows) { "7K" } else { "10K" };
+    let threshold = "10K";
 
     ts.ucmd()
         .arg("--apparent-size")
@@ -995,6 +1109,27 @@ fn test_du_threshold() {
         .stdout_contains("deeper_dir");
 }
 
+#[test]
+#[cfg(not(target_os = "openbsd"))]
+fn test_du_binary_threshold() {
+    let ts = TestScenario::new(util_name!());
+    let at = &ts.fixtures;
+
+    at.mkdir_all("subdir/links");
+    at.mkdir_all("subdir/deeper/deeper_dir");
+    at.write("subdir/links/bigfile.txt", &"x".repeat(10000));
+    at.write("subdir/deeper/deeper_dir/smallfile.txt", "small");
+
+    let threshold_bin = "0b10011100010000";
+
+    ts.ucmd()
+        .arg("--apparent-size")
+        .arg(format!("--threshold={threshold_bin}"))
+        .succeeds()
+        .stdout_contains("links")
+        .stdout_does_not_contain("deeper_dir");
+}
+
 #[test]
 fn test_du_invalid_threshold() {
     let ts = TestScenario::new(util_name!());
@@ -1528,7 +1663,7 @@ fn test_du_blocksize_zero_do_not_panic() {
     let ts = TestScenario::new(util_name!());
     let at = &ts.fixtures;
     at.write("foo", "some content");
-    for block_size in ["0", "00", "000", "0x0"] {
+    for block_size in ["0", "00", "000", "0x0", "0b0"] {
         ts.ucmd()
             .arg(format!("-B{block_size}"))
             .arg("foo")