Add option to parse as utf16

README.md

@@ -1,12 +1,37 @@
 # enc-check #
 
+## Installation ##
+
+`cargo install enc-check`
+
 ## Usage ##
 
 Inspect character encodings.
 
-`enc-check asdᚢ𐌰`
+```
+enc-check --help
+
+Usage: enc-check [OPTIONS] <-8|-6> <NAME>
+
+Arguments:
+  <NAME>
+          The string to inspect
+
+Options:
+  -8
+          Inspect utf-8
+  -6
+          Inspect utf-16
+  -j, --json
+          Output as json. Useful as a command line tool
+  -h, --help
+          Print help
+```
+
 
 ```
+enc-check -8 asdᚢ𐌰
+
 ┌───────┬───────┬───────────┬──────┬─────┬─────┬──────────┐
 │ U+dec │ U+hex │ character │ byte │ hex │ dec │ bin      │
 ├───────┼───────┼───────────┼──────┼─────┼─────┼──────────┤
@@ -23,6 +48,3 @@ Inspect character encodings.
 └───────┴───────┴───────────┴──────┴─────┴─────┴──────────┘
 ```
 
-## Installation ##
-
-`cargo install enc-check`

src/main.rs

@@ -1,17 +1,9 @@
-use clap::Parser;
+use clap::{Parser, Args};
 use tabled::{
     builder::Builder,
     settings::{Modify, object::Rows, Alignment, Style}
 };
 
-#[derive(Parser)]
-struct CliArgs {
-    name: String,
-
-    #[arg(short = 'j', long = "json", action)]
-    json: bool,
-}
-
 struct StringDetail {
     characters: Vec<CharacterDetail>,
     len: usize,
@@ -39,11 +31,26 @@ impl StringDetail{
         details
     }
 
+    fn parse_utf16(query: &String) -> Self {
+        let mut details:StringDetail = StringDetail::default();
+        for i in query.chars() {
+            let mut bytes = [0; 2];
+            i.encode_utf16(&mut bytes);
+            details.push_utf16(Some(i), bytes[0]);
+            if bytes[1] != 0x00000000 {
+                details.push_utf16(None, bytes[1]);
+            }
+        }
+
+        details
+    }
+
     fn default() -> Self {
         Self { characters: Vec::new(), len: 0 }
     }
 
-    fn push(&mut self, character:Option<char>, byte:u8){ self.characters
+    fn push(&mut self, character:Option<char>, byte:u8){ 
+        self.characters
             .push(CharacterDetail {
                 byte_index: self.len,
                 character,
@@ -52,6 +59,12 @@ impl StringDetail{
         self.len += 1;
     }
 
+    fn push_utf16(&mut self, character:Option<char>, byte: u16){
+        let bytes = byte.to_be_bytes();
+        self.push(character, bytes[0]);
+        self.push(None, bytes[1]);
+    }
+
     fn print_table(&self) {
         let mut table_builder = Builder::default();
         table_builder.set_header(StringDetail::table_header());
@@ -115,11 +128,42 @@ impl StringDetail{
 
 }
 
+#[derive(Parser)]
+#[command(next_line_help = true)]
+struct CliArgs {
+    /// The string to inspect
+    name: String,
+
+    #[command(flatten)]
+    inspect: InspectArgs,
+
+    /// Output as json. Useful as a command line tool
+    #[arg(short = 'j', long = "json", action)]
+    json: bool,
+}
+
+#[derive(Args)]
+#[group(required = true, multiple = false)]
+struct InspectArgs {
+    /// Inspect utf-8
+    #[arg(short = '8', action)]
+    utf8: bool,
+
+    /// Inspect utf-16
+    #[arg(short = '6', action)]
+    utf16: bool,
+}
+
+
 fn main() {
     let cli = CliArgs::parse();
-    let utf8 = StringDetail::parse_utf8(&cli.name);
+    let details = match cli.inspect.utf8 {
+        true => StringDetail::parse_utf8(&cli.name),
+        false => StringDetail::parse_utf16(&cli.name)
+    };
+
     match cli.json {
-        false => utf8.print_table(),
+        false => details.print_table(),
-        _ => panic!("Not yet implemented!!"),
+        true => panic!("Output as json is not yet implemented")
     }
 }