From f146743061ba8170569bf18518202df9a43c09f3 Mon Sep 17 00:00:00 2001
From: Rutger Broekhoff
Date: Fri, 26 Jan 2024 12:28:39 +0100
Subject: Clean up part of the code

---
 shell/src/main.rs | 158 +++++++++++++++++++++++++++---------------------------
 1 file changed, 79 insertions(+), 79 deletions(-)

(limited to 'shell/src')

diff --git a/shell/src/main.rs b/shell/src/main.rs
index 4901e7f..4a98828 100644
--- a/shell/src/main.rs
+++ b/shell/src/main.rs
@@ -1,84 +1,5 @@
 use std::{os::unix::process::CommandExt, process::ExitCode};
 
-fn parse_sq(s: &str) -> Option<(String, &str)> {
-    #[derive(PartialEq, Eq)]
-    enum SqState {
-        Quoted,
-        Unquoted { may_escape: bool },
-        UnquotedEscaped,
-    }
-
-    let mut result = String::new();
-    let mut state = SqState::Unquoted { may_escape: false };
-    let mut remaining = "";
-    for (i, c) in s.char_indices() {
-        match state {
-            SqState::Unquoted { may_escape: false } => {
-                if c != '\'' {
-                    return None;
-                }
-                state = SqState::Quoted
-            }
-            SqState::Quoted => {
-                if c == '\'' {
-                    state = SqState::Unquoted { may_escape: true };
-                    continue;
-                }
-                result.push(c);
-            }
-            SqState::Unquoted { may_escape: true } => {
-                if is_posix_space(c) {
-                    remaining = &s[i..];
-                    break;
-                }
-                if c != '\\' {
-                    return None;
-                }
-                state = SqState::UnquotedEscaped;
-            }
-            SqState::UnquotedEscaped => {
-                if c != '\\' && c != '!' {
-                    return None;
-                }
-                result.push(c);
-                state = SqState::Unquoted { may_escape: false };
-            }
-        }
-    }
-
-    if state != (SqState::Unquoted { may_escape: true }) {
-        return None;
-    }
-    Some((result, remaining))
-}
-
-fn parse_cmd(mut cmd: &str) -> Option<Vec<String>> {
-    let mut args = Vec::<String>::new();
-
-    cmd = cmd.trim_matches(is_posix_space);
-    while !cmd.is_empty() {
-        if cmd.starts_with('\'') {
-            let (arg, remaining) = parse_sq(cmd)?;
-            args.push(arg);
-            cmd = remaining.trim_start_matches(is_posix_space);
-        } else if let Some((arg, remaining)) = cmd.split_once(is_posix_space) {
-            args.push(arg.to_owned());
-            cmd = remaining.trim_start_matches(is_posix_space);
-        } else {
-            args.push(cmd.to_owned());
-            cmd = "";
-        }
-    }
-
-    Some(args)
-}
-
-fn is_posix_space(c: char) -> bool {
-    // Form feed: 0x0c
-    // Vertical tab: 0x0b
-    c == ' ' || c == '\x0c' || c == '\n' || c == '\r' || c == '\t' || c == '\x0b'
-}
-
 fn main() -> ExitCode {
     let bad_usage = ExitCode::from(2);
 
@@ -141,3 +62,82 @@ fn main() -> ExitCode {
     eprintln!("Error: {e}");
     ExitCode::FAILURE
 }
+
+fn parse_cmd(mut cmd: &str) -> Option<Vec<String>> {
+    let mut args = Vec::<String>::new();
+
+    cmd = cmd.trim_matches(is_posix_space);
+    while !cmd.is_empty() {
+        if cmd.starts_with('\'') {
+            let (arg, remaining) = parse_sq(cmd)?;
+            args.push(arg);
+            cmd = remaining.trim_start_matches(is_posix_space);
+        } else if let Some((arg, remaining)) = cmd.split_once(is_posix_space) {
+            args.push(arg.to_owned());
+            cmd = remaining.trim_start_matches(is_posix_space);
+        } else {
+            args.push(cmd.to_owned());
+            cmd = "";
+        }
+    }
+
+    Some(args)
+}
+
+fn is_posix_space(c: char) -> bool {
+    // Form feed: 0x0c
+    // Vertical tab: 0x0b
+    c == ' ' || c == '\x0c' || c == '\n' || c == '\r' || c == '\t' || c == '\x0b'
+}
+
+fn parse_sq(s: &str) -> Option<(String, &str)> {
+    #[derive(PartialEq, Eq)]
+    enum SqState {
+        Quoted,
+        Unquoted { may_escape: bool },
+        UnquotedEscaped,
+    }
+
+    let mut result = String::new();
+    let mut state = SqState::Unquoted { may_escape: false };
+    let mut remaining = "";
+    for (i, c) in s.char_indices() {
+        match state {
+            SqState::Unquoted { may_escape: false } => {
+                if c != '\'' {
+                    return None;
+                }
+                state = SqState::Quoted
+            }
+            SqState::Quoted => {
+                if c == '\'' {
+                    state = SqState::Unquoted { may_escape: true };
+                    continue;
+                }
+                result.push(c);
+            }
+            SqState::Unquoted { may_escape: true } => {
+                if is_posix_space(c) {
+                    remaining = &s[i..];
+                    break;
+                }
+                if c != '\\' {
+                    return None;
+                }
+                state = SqState::UnquotedEscaped;
+            }
+            SqState::UnquotedEscaped => {
+                if c != '\\' && c != '!' {
+                    return None;
+                }
+                result.push(c);
+                state = SqState::Unquoted { may_escape: false };
+            }
+        }
+    }
+
+    if state != (SqState::Unquoted { may_escape: true }) {
+        return None;
+    }
+    Some((result, remaining))
+}
-- 
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