src/format.rs

@@ -1,7 +1,11 @@
+#![allow(dead_code)] // this is exported to lib.rs
+use clap::{ArgGroup, Parser};
+use clap_num::maybe_hex;
 use libpt::bintols::split;
 
 pub type Num = u128;
 
+/// formats supported by numf
 #[derive(Copy, Clone, Debug)]
 pub enum Format {
     Dec,
@@ -12,6 +16,140 @@ pub enum Format {
     Base32,
 }
 
+/// Describes what the formatter should do
+///
+/// Use [Self::default] to get a basic variant or create a object yourself.
+///
+/// This struct can be parsed with [clap] derive.
+#[derive(Parser, Debug, Clone, PartialEq, Eq, Hash)]
+#[clap(author, version, about, long_about = None)]
+#[command(
+    author,
+    version,
+    about,
+    long_about,
+    help_template = r#"{about-section}
+{usage-heading} {usage}
+{all-args}{tab}
+
+{name}: {version}
+Author: {author-with-newline}
+"#
+)]
+#[clap(group(
+            ArgGroup::new("format")
+                .args(&["hex", "bin", "oct", "dec", "base64", "base32"]),
+        ))]
+pub struct FormatOptions {
+    #[arg(short, long)]
+    /// add a prefix (like "0x" for hex)
+    prefix: bool,
+    #[arg(short = 'P', long)]
+    /// add a padding to make the number at least one byte long
+    ///
+    /// For example, `0b1100` will be `0b00001100` with this.
+    /// This does not apply to all formats, only hexadecimal and binary.
+    padding: bool,
+    #[arg(short = 'x', long, default_value_t = true)]
+    /// format to hexadecimal
+    hex: bool,
+    #[arg(short, long)]
+    /// format to binary
+    bin: bool,
+    #[arg(short, long)]
+    /// format to decimal
+    dec: bool,
+    #[arg(short, long)]
+    /// format to octal
+    oct: bool,
+    #[arg(short = 's', long)]
+    /// format to base64
+    base64: bool,
+    #[arg(short = 'z', long)]
+    /// format to base32
+    base32: bool,
+    #[clap(value_parser=maybe_hex::<Num>, required=true)]
+    /// at least one number that should be formatted
+    ///
+    /// supports either base 10 or base 16 inputs (with 0xaaaa)
+    numbers: Vec<Num>,
+}
+
+impl FormatOptions {
+    /// get the format that the user has configured
+    pub fn format(&self) -> Format {
+        if self.oct {
+            Format::Octal
+        } else if self.bin {
+            Format::Bin
+        } else if self.dec {
+            Format::Dec
+        } else if self.base64 {
+            Format::Base64
+        } else if self.base32 {
+            Format::Base32
+        } else if self.hex {
+            Format::Hex
+        } else {
+            unreachable!()
+        }
+    }
+
+    /// set the format manually
+    pub fn set_format(&mut self, format: Format) {
+        self.bin = false;
+        self.oct = false;
+        self.dec = false;
+        self.hex = false;
+        self.base64 = false;
+        self.base32 = false;
+        match format {
+            Format::Bin => self.bin = true,
+            Format::Hex => self.hex = true,
+            Format::Octal => self.oct = true,
+            Format::Base64 => self.base64 = true,
+            Format::Base32 => self.base32 = true,
+            Format::Dec => self.dec = true,
+        }
+    }
+
+    /// get numbers
+    pub fn numbers(&self) -> &[u128] {
+        self.numbers.as_ref()
+    }
+
+    /// set numbers manually
+    pub fn set_numbers(&mut self, numbers: Vec<Num>) {
+        self.numbers = numbers;
+    }
+
+    /// get padding
+    pub fn padding(&self) -> bool {
+        self.padding
+    }
+
+    /// get prefix
+    pub fn prefix(&self) -> bool {
+        self.prefix
+    }
+}
+
+impl Default for FormatOptions {
+    fn default() -> Self {
+        Self {
+            padding: false,
+            prefix: false,
+            oct: false,
+            hex: true,
+            bin: false,
+            base32: false,
+            base64: false,
+            dec: false,
+            numbers: vec![],
+        }
+    }
+}
+
 impl Format {
     pub fn prefix(&self) -> String {
         match self {
@@ -31,17 +169,27 @@ impl Format {
         }
         .to_string()
     }
-    pub fn format(&self, num: Num, prefix: bool) -> String {
+    pub fn format(&self, num: Num, options: &FormatOptions) -> String {
         let mut buf = String::new();
-        if prefix {
+        if options.prefix {
             buf += &self.prefix();
         }
         match self {
             Format::Hex => {
-                buf += &format!("{num:X}");
+                if options.padding {
+                    let tmp = &format!("{num:X}");
+                    buf += &("0".repeat((2 - tmp.len() % 2) % 2) + tmp);
+                } else {
+                    buf += &format!("{num:X}");
+                }
             }
             Format::Bin => {
-                buf += &format!("{num:b}");
+                if options.padding {
+                    let tmp = &format!("{num:b}");
+                    buf += &("0".repeat((8 - tmp.len() % 8) % 8) + tmp);
+                } else {
+                    buf += &format!("{num:b}");
+                }
             }
             Format::Octal => {
                 buf += &format!("{num:o}");

src/main.rs

@@ -3,87 +3,18 @@
 //! This binary should just take any amount of numbers and print them out formatted to some other
 //! system.
 
-use clap::{ArgGroup, Parser};
-use clap_num::maybe_hex;
+use clap::Parser;
 
 mod format;
 use format::*;
 
-#[derive(Parser, Debug)]
-#[clap(author, version, about, long_about = None)]
-#[command(
-    author,
-    version,
-    about,
-    long_about,
-    help_template = r#"{about-section}
-{usage-heading} {usage}
-{all-args}{tab}
-
-{name}: {version}
-Author: {author-with-newline}
-"#
-)]
-#[clap(group(
-            ArgGroup::new("format")
-                .args(&["hex", "bin", "oct", "dec", "base64", "base32"]),
-        ))]
-struct Cli {
-    #[arg(short, long)]
-    /// add a prefix (like "0x" for hex)
-    prefix: bool,
-    #[arg(short = 'x', long, default_value_t = true)]
-    /// format to hexadecimal
-    hex: bool,
-    #[arg(short, long)]
-    /// format to binary
-    bin: bool,
-    #[arg(short, long)]
-    /// format to decimal
-    dec: bool,
-    #[arg(short, long)]
-    /// format to octal
-    oct: bool,
-    #[arg(short = 's', long)]
-    /// format to base64
-    base64: bool,
-    #[arg(short = 'z', long)]
-    /// format to base32
-    base32: bool,
-    #[clap(value_parser=maybe_hex::<Num>, required=true)]
-    /// at least one number that should be formatted
-    ///
-    /// supports either base 10 or base 16 inputs (with 0xaaaa)
-    numbers: Vec<Num>,
-}
-
-impl Cli {
-    fn format(&self) -> Format {
-        if self.oct {
-            Format::Octal
-        } else if self.bin {
-            Format::Bin
-        } else if self.dec {
-            Format::Dec
-        } else if self.base64 {
-            Format::Base64
-        } else if self.base32 {
-            Format::Base32
-        } else if self.hex {
-            Format::Hex
-        } else {
-            unreachable!()
-        }
-    }
-}
-
 fn main() {
-    let cli = Cli::parse();
+    let options = FormatOptions::parse();
 
     let mut out: Vec<String> = Vec::new();
 
-    for num in &cli.numbers {
-        out.push(cli.format().format(*num, cli.prefix));
+    for num in options.numbers() {
+        out.push(options.format().format(*num, &options));
     }
     for o in out {
         println!("{o}")