feat(rand): #19 #21 add max rand and use number parser

src/format.rs

@@ -86,11 +86,16 @@ pub struct FormatOptions {
     #[arg(short = 's', long)]
     /// format to base64
     base64: bool,
-    #[arg(short = 'r', long, default_value_t = 0)]
+    #[arg(short = 'r', long, default_value_t = 0, value_parser=numf_parser::<NumberType>)]
     /// output random numbers
     ///
     /// Add a user defined amount of cryptographically pseudorandom numbers to the number list.
-    rand: usize,
+    rand: NumberType,
+    #[arg(long, default_value_t = NumberType::MAX, value_parser=numf_parser::<NumberType>)]
+    /// max for the random numbers
+    ///
+    /// Generated numbers will not be lower than this. Only has an effect with --rand set.
+    rand_max: NumberType,
     #[arg(short = 'z', long)]
     /// format to base32
     base32: bool,
@@ -190,14 +195,24 @@ impl FormatOptions {
     }
 
     /// get rand
-    pub fn rand(&self) -> usize {
+    pub fn rand(&self) -> NumberType {
         self.rand
     }
 
     /// set amount of extra random numbers manually
-    pub fn set_rand(&mut self, rand: usize) {
+    pub fn set_rand(&mut self, rand: NumberType) {
         self.rand = rand;
     }
+
+    /// get highes allowed random value
+    pub fn rand_max(&self) -> NumberType {
+        self.rand_max
+    }
+
+    /// set highes allowed random value
+    pub fn set_rand_max(&mut self, rand_max: NumberType) {
+        self.rand_max = rand_max;
+    }
 }
 
 impl Default for FormatOptions {
@@ -212,7 +227,8 @@ impl Default for FormatOptions {
             base64: false,
             dec: false,
             numbers: vec![],
-            rand: 0
+            rand: 0,
+            rand_max: NumberType::MAX
         }
     }
 }

src/main.rs

@@ -10,7 +10,7 @@ use clap::{CommandFactory, Parser};
 
 mod format;
 use format::*;
-use numf::format::{numf_parser, NumberType};
+use numf::format::numf_parser;
 
 fn main() -> anyhow::Result<()> {
     // try to read from stdin first, appending the numbers we read to the FormatOptions
@@ -53,10 +53,7 @@ fn main() -> anyhow::Result<()> {
         use rand::prelude::*;
         let mut rand = rand::rngs::OsRng;
         for _i in 0..options.rand() {
-            let mut by: [u8; 16] = [0; 16];
-            rand.fill_bytes(&mut by);
-            let n: NumberType = libpt::bintols::join::array_to_unsigned(&by)?;
-            options.push_number(n);
+            options.push_number(rand.gen_range(0..options.rand_max()));
         }
     }