Add pretty-printing for bytes

src/bytes.rs

@@ -0,0 +1,30 @@
+use std::cmp;
+
+const UNITS: [&str; 4] = ["B", "kB", "MB", "GB"];
+
+pub struct Bytes {
+    bytes: f64,
+}
+
+impl Bytes {
+    pub fn new(bytes: u64) -> Self {
+        Self {
+            bytes: bytes as f64,
+        }
+    }
+}
+
+impl std::fmt::Display for Bytes {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let num = self.bytes;
+        debug_assert!(num >= 0.0);        
+        if num < 1_f64 {
+            return write!(f, "{} B", num);
+        }
+        let delimiter = 1000_f64;
+        let exponent = cmp::min((num.ln() / 6.90775).floor() as i32, 4);
+
+        write!(f, "{:.2} ", num / delimiter.powi(exponent))?;
+        write!(f, "{}", UNITS[exponent as usize])
+    }
+}

src/compressors/bzip.rs

@@ -5,6 +5,7 @@ use colored::Colorize;
 use super::{Compressor, Entry};
 use crate::{
     extension::CompressionFormat,
+    bytes::Bytes,
     file::File,
     utils::{check_for_multiple_files, ensure_exists},
 };
@@ -22,10 +23,10 @@ impl BzipCompressor {
         };
 
         println!(
-            "{}: compressed {:?} into memory ({} bytes)",
+            "{}: compressed {:?} into memory ({})",
             "info".yellow(),
             &path,
-            contents.len()
+            Bytes::new(contents.len() as u64)
         );
 
         Ok(contents)

src/compressors/gzip.rs

@@ -6,6 +6,7 @@ use super::{Compressor, Entry};
 use crate::{
     extension::CompressionFormat,
     file::File,
+    bytes::Bytes,
     utils::{check_for_multiple_files, ensure_exists},
 };
 
@@ -27,10 +28,10 @@ impl GzipCompressor {
         };
 
         println!(
-            "{}: compressed {:?} into memory ({} bytes)",
+            "{}: compressed {:?} into memory ({})",
             "info".yellow(),
             &path,
-            bytes.len()
+            Bytes::new(bytes.len() as u64)
         );
 
         Ok(bytes)

src/compressors/lzma.rs

@@ -6,6 +6,7 @@ use super::{Compressor, Entry};
 use crate::{
     extension::CompressionFormat,
     file::File,
+    bytes::Bytes,
     utils::{check_for_multiple_files, ensure_exists},
 };
 
@@ -27,10 +28,10 @@ impl LzmaCompressor {
         };
 
         println!(
-            "{}: compressed {:?} into memory ({} bytes)",
+            "{}: compressed {:?} into memory ({})",
             "info".yellow(),
             &path,
-            bytes.len()
+            Bytes::new(bytes.len() as u64)
         );
 
         Ok(bytes)

src/decompressors/tar.rs

@@ -8,7 +8,7 @@ use colored::Colorize;
 use tar::{self, Archive};
 
 use super::decompressor::{DecompressionResult, Decompressor};
-use crate::{dialogs::Confirmation, file::File, utils};
+use crate::{dialogs::Confirmation, file::File, bytes::Bytes, utils};
 
 #[derive(Debug)]
 pub struct TarDecompressor {}
@@ -45,10 +45,10 @@ impl TarDecompressor {
             file.unpack_in(into)?;
 
             println!(
-                "{}: {:?} extracted. ({} bytes)",
+                "{}: {:?} extracted. ({})",
                 "info".yellow(),
                 into.join(file.path()?),
-                file.size()
+                Bytes::new(file.size())
             );
 
             let file_path = fs::canonicalize(file_path)?;

src/decompressors/to_memory.rs

@@ -7,7 +7,7 @@ use colored::Colorize;
 
 use super::decompressor::{DecompressionResult, Decompressor};
 use crate::utils;
-// use niffler;
+use crate::bytes::Bytes;
 use crate::{extension::CompressionFormat, file::File};
 
 struct DecompressorToMemory {}
@@ -37,10 +37,10 @@ impl DecompressorToMemory {
         let bytes_read = reader.read_to_end(&mut buffer)?;
 
         println!(
-            "{}: {:?} extracted into memory ({} bytes).",
+            "{}: {:?} extracted into memory ({}).",
             "info".yellow(),
             path,
-            bytes_read
+            Bytes::new(bytes_read as u64)
         );
 
         Ok(buffer)

src/decompressors/zip.rs

@@ -8,7 +8,7 @@ use colored::Colorize;
 use zip::{self, read::ZipFile, ZipArchive};
 
 use super::decompressor::{DecompressionResult, Decompressor};
-use crate::{dialogs::Confirmation, file::File, utils};
+use crate::{dialogs::Confirmation, file::File, bytes::Bytes, utils};
 
 #[cfg(unix)]
 fn __unix_set_permissions(file_path: &Path, file: &ZipFile) {
@@ -73,10 +73,10 @@ impl ZipDecompressor {
                         }
                     }
                     println!(
-                        "{}: \"{}\" extracted. ({} bytes)",
+                        "{}: \"{}\" extracted. ({})",
                         "info".yellow(),
                         file_path.display(),
-                        file.size()
+                        Bytes::new(file.size())
                     );
 
                     let mut output_file = fs::File::create(&file_path)?;

src/evaluator.rs

@@ -7,6 +7,7 @@ use std::{
 use colored::Colorize;
 
 use crate::{
+    bytes::Bytes,
     cli::{VERSION, Command},
     compressors::{
         Entry, Compressor, BzipCompressor, GzipCompressor, LzmaCompressor, TarCompressor,
@@ -199,10 +200,10 @@ impl Evaluator {
         };
 
         println!(
-            "{}: writing to {:?}. ({} bytes)",
+            "{}: writing to {:?}. ({})",
             "info".yellow(),
             output_path,
-            bytes.len()
+            Bytes::new(bytes.len() as u64)
         );
         fs::write(output_path, bytes)?;
 

src/extension.rs

@@ -7,7 +7,7 @@ use std::{
 
 use CompressionFormat::*;
 
-use crate::{debug, utils::to_utf};
+use crate::utils::to_utf;
 
 /// Represents the extension of a file, but only really caring about
 /// compression formats (and .tar).

src/main.rs

@@ -1,3 +1,4 @@
+mod bytes;
 mod cli;
 mod compressors;
 mod decompressors;

src/test.rs

@@ -26,7 +26,7 @@ where
 }
 
 #[cfg(test)]
-mod tests {
+mod argparsing {
     use super::{make_dummy_files};
     use crate::cli;
     use crate::cli::Command;
@@ -103,6 +103,77 @@ mod tests {
     }
 }
 
+#[cfg(test)]
+mod byte_pretty_printing {
+    use crate::bytes::Bytes;
+    #[test]
+    fn bytes () {
+        assert_eq!(
+            &format!("{}", Bytes::new(234)),
+            "234.00 B"
+        );
+
+        assert_eq!(
+            &format!("{}", Bytes::new(999)),
+            "999.00 B"
+        );
+    }
+
+    #[test]
+    fn kilobytes () {
+        assert_eq!(
+            &format!("{}", Bytes::new(2234)),
+            "2.23 kB"
+        );
+
+        assert_eq!(
+            &format!("{}", Bytes::new(62500)),
+            "62.50 kB"
+        );
+
+        assert_eq!(
+            &format!("{}", Bytes::new(329990)),
+            "329.99 kB"
+        );
+    }
+
+    #[test]
+    fn megabytes () {
+        assert_eq!(
+            &format!("{}", Bytes::new(2750000)),
+            "2.75 MB"
+        );
+
+        assert_eq!(
+            &format!("{}", Bytes::new(55000000)),
+            "55.00 MB"
+        );
+
+        assert_eq!(
+            &format!("{}", Bytes::new(987654321)),
+            "987.65 MB"
+        );
+    }
+
+    #[test]
+    fn gigabytes () {
+        assert_eq!(
+            &format!("{}", Bytes::new(5280000000)),
+            "5.28 GB"
+        );
+
+        assert_eq!(
+            &format!("{}", Bytes::new(95200000000)),
+            "95.20 GB"
+        );
+
+        assert_eq!(
+            &format!("{}", Bytes::new(302000000000)),
+            "302.00 GB"
+        );
+    }
+}
+
 // #[cfg(test)]
 // mod cli {
 //     use super::*;