From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/xflags/src/rt.rs | 114 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 vendor/xflags/src/rt.rs

(limited to 'vendor/xflags/src/rt.rs')

diff --git a/vendor/xflags/src/rt.rs b/vendor/xflags/src/rt.rs
new file mode 100644
index 000000000..3c33196af
--- /dev/null
+++ b/vendor/xflags/src/rt.rs
@@ -0,0 +1,114 @@
+use std::{ffi::OsString, fmt, str::FromStr};
+
+use crate::{Error, Result};
+
+macro_rules! format_err {
+    ($($tt:tt)*) => {
+        Error { msg: format!($($tt)*) }
+    };
+}
+
+macro_rules! bail {
+    ($($tt:tt)*) => {
+        return Err(format_err!($($tt)*))
+    };
+}
+
+pub struct Parser {
+    rargs: Vec<OsString>,
+}
+
+impl Parser {
+    pub fn new(mut args: Vec<OsString>) -> Self {
+        args.reverse();
+        Self { rargs: args }
+    }
+
+    pub fn new_from_env() -> Self {
+        let mut args = std::env::args_os().collect::<Vec<_>>();
+        args.reverse();
+        args.pop();
+        Self { rargs: args }
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.rargs.is_empty()
+    }
+
+    pub fn peek_flag(&self) -> Option<&str> {
+        self.rargs.last().and_then(|it| it.to_str()).filter(|it| it.starts_with('-'))
+    }
+    pub fn pop_flag(&mut self) -> Option<Result<String, OsString>> {
+        if self.peek_flag().is_some() {
+            self.next().map(|it| it.into_string())
+        } else {
+            self.next().map(Err)
+        }
+    }
+    pub fn push_back(&mut self, arg: Result<String, OsString>) {
+        let arg = match arg {
+            Ok(it) => it.into(),
+            Err(it) => it,
+        };
+        self.rargs.push(arg)
+    }
+
+    pub fn next(&mut self) -> Option<OsString> {
+        self.rargs.pop()
+    }
+
+    pub fn next_value(&mut self, flag: &str) -> Result<OsString> {
+        if self.peek_flag().is_some() {
+            bail!("expected a value for `{}`", flag)
+        }
+        self.next().ok_or_else(|| format_err!("expected a value for `{}`", flag))
+    }
+
+    pub fn next_value_from_str<T: FromStr>(&mut self, flag: &str) -> Result<T>
+    where
+        T::Err: fmt::Display,
+    {
+        let value = self.next_value(flag)?;
+        self.value_from_str(flag, value)
+    }
+
+    pub fn value_from_str<T: FromStr>(&mut self, flag: &str, value: OsString) -> Result<T>
+    where
+        T::Err: fmt::Display,
+    {
+        match value.into_string() {
+            Ok(str) => {
+                str.parse::<T>().map_err(|err| format_err!("can't parse `{}`, {}", flag, err))
+            }
+            Err(it) => {
+                bail!("can't parse `{}`, invalid utf8: {:?}", flag, it)
+            }
+        }
+    }
+
+    pub fn unexpected_flag(&self, flag: &str) -> Error {
+        format_err!("unexpected flag: `{}`", flag)
+    }
+
+    pub fn unexpected_arg(&self, arg: OsString) -> Error {
+        format_err!("unexpected argument: {:?}", arg)
+    }
+
+    pub fn optional<T>(&self, flag: &str, mut vals: Vec<T>) -> Result<Option<T>> {
+        if vals.len() > 1 {
+            bail!("flag specified more than once: `{}`", flag)
+        }
+        Ok(vals.pop())
+    }
+
+    pub fn required<T>(&self, flag: &str, mut vals: Vec<T>) -> Result<T> {
+        if vals.len() > 1 {
+            bail!("flag specified more than once: `{}`", flag)
+        }
+        vals.pop().ok_or_else(|| format_err!("flag is required: `{}`", flag))
+    }
+
+    pub fn subcommand<T>(&self, cmd: Option<T>) -> Result<T> {
+        cmd.ok_or_else(|| format_err!("subcommand is required"))
+    }
+}
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