add some more stuff from brigadier

1 files changed, 45 insertions, 0 deletions

diff --git a/azalea-brigadier/src/context/string_range.rs b/azalea-brigadier/src/context/string_range.rs
index e69de29b..d775ab68 100644
--- a/azalea-brigadier/src/context/string_range.rs
+++ b/azalea-brigadier/src/context/string_range.rs
@@ -0,0 +1,45 @@
+use std::cmp;
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct StringRange {
+    start: usize,
+    end: usize,
+}
+
+impl StringRange {
+    pub fn new(start: usize, end: usize) -> Self {
+        Self { start, end }
+    }
+
+    pub fn at(pos: usize) -> Self {
+        Self::new(pos, pos)
+    }
+
+    pub fn between(start: usize, end: usize) -> Self {
+        Self::new(start, end)
+    }
+
+    pub fn encompassing(a: &Self, b: &Self) -> Self {
+        Self::new(cmp::min(a.start, b.start), cmp::max(a.end, b.end))
+    }
+
+    pub fn start(&self) -> usize {
+        self.start
+    }
+
+    pub fn end(&self) -> usize {
+        self.end
+    }
+
+    pub fn get(&self, reader: &str) -> &str {
+        &reader[self.start..self.end]
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.start == self.end
+    }
+
+    pub fn length(&self) -> usize {
+        self.end - self.start
+    }
+}