Fixes bug with too large inputs causing a panic

We would prefer a more graceful error message stating what went wrong.
Caught by the Travis test.

README.md

@@ -142,7 +142,7 @@ Run using `btm`.
 
 - `-t`, `--default_time_value` will set the default time interval graphs will display to (in milliseconds). Lowest is 30 seconds, defaults to 60 seconds.
 
-- `-i`, `--time_delta` will set the amount each zoom in/out action will change the time interval of a graph (in milliseconds). Lowest is 1 second, defaults to 15 seconds.
+- `-d`, `--time_delta` will set the amount each zoom in/out action will change the time interval of a graph (in milliseconds). Lowest is 1 second, defaults to 15 seconds.
 
 ### Keybindings
 

src/main.rs

@@ -87,8 +87,10 @@ fn get_matches() -> clap::ArgMatches<'static> {
 		(@arg REGEX_DEFAULT: -R --regex "Use regex in searching by default.")
         (@arg SHOW_DISABLED_DATA: -s --show_disabled_data "Show disabled data entries.")
         (@arg DEFAULT_TIME_VALUE: -t --default_time_value +takes_value "Default time value for graphs in milliseconds; minimum is 30s, defaults to 60s.")
-        (@arg TIME_DELTA: -i --time_delta +takes_value "The amount changed upon zooming in/out in milliseconds; minimum is 1s, defaults to 15s.")
+        (@arg TIME_DELTA: -d --time_delta +takes_value "The amount changed upon zooming in/out in milliseconds; minimum is 1s, defaults to 15s.")
-		(@group DEFAULT_WIDGET =>
+        (@arg HIDE_TIME: --hide_time "Completely hide the time scaling")
+        (@arg AUTOHIDE_TIME: --autohide_time "Automatically hide the time scaling in graphs after being shown for a brief moment when zoomed in/out.  If time is disabled then this will have no effect.")
+        (@group DEFAULT_WIDGET =>
 			(@arg CPU_WIDGET: --cpu_default "Selects the CPU widget to be selected by default.")
 			(@arg MEM_WIDGET: --memory_default "Selects the memory widget to be selected by default.")
 			(@arg DISK_WIDGET: --disk_default "Selects the disk widget to be selected by default.")

src/options.rs

@@ -56,15 +56,15 @@ pub fn get_update_rate_in_milliseconds(
     update_rate: &Option<&str>, config: &Config,
 ) -> error::Result<u64> {
     let update_rate_in_milliseconds = if let Some(update_rate) = update_rate {
-        update_rate.parse::<u64>()?
+        update_rate.parse::<u128>()?
     } else if let Some(flags) = &config.flags {
         if let Some(rate) = flags.rate {
-            rate
+            rate as u128
         } else {
-            DEFAULT_REFRESH_RATE_IN_MILLISECONDS
+            DEFAULT_REFRESH_RATE_IN_MILLISECONDS as u128
         }
     } else {
-        DEFAULT_REFRESH_RATE_IN_MILLISECONDS
+        DEFAULT_REFRESH_RATE_IN_MILLISECONDS as u128
     };
 
     if update_rate_in_milliseconds < 250 {
@@ -77,7 +77,7 @@ pub fn get_update_rate_in_milliseconds(
         ));
     }
 
-    Ok(update_rate_in_milliseconds)
+    Ok(update_rate_in_milliseconds as u64)
 }
 
 pub fn get_temperature_option(
@@ -184,15 +184,15 @@ pub fn get_default_time_value_option(
     matches: &clap::ArgMatches<'static>, config: &Config,
 ) -> error::Result<u64> {
     let default_time = if let Some(default_time_value) = matches.value_of("DEFAULT_TIME_VALUE") {
-        default_time_value.parse::<u64>()?
+        default_time_value.parse::<u128>()?
     } else if let Some(flags) = &config.flags {
         if let Some(default_time_value) = flags.default_time_value {
-            default_time_value
+            default_time_value as u128
         } else {
-            DEFAULT_TIME_MILLISECONDS
+            DEFAULT_TIME_MILLISECONDS as u128
         }
     } else {
-        DEFAULT_TIME_MILLISECONDS
+        DEFAULT_TIME_MILLISECONDS as u128
     };
 
     if default_time < 30000 {
@@ -205,35 +205,35 @@ pub fn get_default_time_value_option(
         ));
     }
 
-    Ok(default_time)
+    Ok(default_time as u64)
 }
 
 pub fn get_time_interval_option(
     matches: &clap::ArgMatches<'static>, config: &Config,
 ) -> error::Result<u64> {
     let time_interval = if let Some(time_interval) = matches.value_of("TIME_DELTA") {
-        time_interval.parse::<u64>()?
+        time_interval.parse::<u128>()?
     } else if let Some(flags) = &config.flags {
         if let Some(time_interval) = flags.time_delta {
-            time_interval
+            time_interval as u128
         } else {
-            TIME_CHANGE_MILLISECONDS
+            TIME_CHANGE_MILLISECONDS as u128
         }
     } else {
-        TIME_CHANGE_MILLISECONDS
+        TIME_CHANGE_MILLISECONDS as u128
     };
 
     if time_interval < 1000 {
         return Err(BottomError::InvalidArg(
-            "Please set your time interval to be at least 1 second.".to_string(),
+            "Please set your time delta to be at least 1 second.".to_string(),
         ));
-    } else if time_interval as u128 > std::u64::MAX as u128 {
+    } else if time_interval > std::u64::MAX as u128 {
         return Err(BottomError::InvalidArg(
-            "Please set your time interval to be at most unsigned INT_MAX.".to_string(),
+            "Please set your time delta to be at most unsigned INT_MAX.".to_string(),
         ));
     }
 
-    Ok(time_interval)
+    Ok(time_interval as u64)
 }
 
 pub fn enable_app_grouping(matches: &clap::ArgMatches<'static>, config: &Config, app: &mut App) {

tests/arg_tests.rs

@@ -34,6 +34,58 @@ fn test_small_rate() -> Result<(), Box<dyn std::error::Error>> {
     Ok(())
 }
 
+#[test]
+fn test_large_default_time() -> Result<(), Box<dyn std::error::Error>> {
+    Command::new(get_os_binary_loc())
+        .arg("-t")
+        .arg("18446744073709551616")
+        .assert()
+        .failure()
+        .stderr(predicate::str::contains(
+            "Please set your default value to be at most unsigned INT_MAX.",
+        ));
+    Ok(())
+}
+
+#[test]
+fn test_small_default_time() -> Result<(), Box<dyn std::error::Error>> {
+    Command::new(get_os_binary_loc())
+        .arg("-t")
+        .arg("900")
+        .assert()
+        .failure()
+        .stderr(predicate::str::contains(
+            "Please set your default value to be at least 30 seconds.",
+        ));
+    Ok(())
+}
+
+#[test]
+fn test_large_delta_time() -> Result<(), Box<dyn std::error::Error>> {
+    Command::new(get_os_binary_loc())
+        .arg("-d")
+        .arg("18446744073709551616")
+        .assert()
+        .failure()
+        .stderr(predicate::str::contains(
+            "Please set your time delta to be at most unsigned INT_MAX.",
+        ));
+    Ok(())
+}
+
+#[test]
+fn test_small_delta_time() -> Result<(), Box<dyn std::error::Error>> {
+    Command::new(get_os_binary_loc())
+        .arg("-d")
+        .arg("900")
+        .assert()
+        .failure()
+        .stderr(predicate::str::contains(
+            "Please set your time delta to be at least 1 second.",
+        ));
+    Ok(())
+}
+
 #[test]
 fn test_large_rate() -> Result<(), Box<dyn std::error::Error>> {
     Command::new(get_os_binary_loc())