autocommit 2022-03-23 16:23:28 CET

src/utils/mod.rs

@@ -21,6 +21,7 @@ pub mod smallmap;
 pub mod stack;
 pub mod syncqueue;
 pub mod tri;
+pub mod trim;
 pub mod vasprintf;
 pub mod vec_ext;
 pub mod vecstorage;

src/utils/trim.rs

@@ -0,0 +1,33 @@
+pub trait AsciiTrim {
+    fn trim(&self) -> &[u8];
+    fn trim_start(&self) -> &[u8];
+    fn trim_end(&self) -> &[u8];
+}
+
+impl AsciiTrim for [u8] {
+    fn trim(&self) -> &[u8] {
+        self.trim_start().trim_end()
+    }
+
+    fn trim_start(&self) -> &[u8] {
+        let mut s = self;
+        while let Some((b, r)) = s.split_first() {
+            if !matches!(*b, b' ' | b'\t' | b'\n') {
+                break;
+            }
+            s = r;
+        }
+        s
+    }
+
+    fn trim_end(&self) -> &[u8] {
+        let mut s = self;
+        while let Some((b, r)) = s.split_last() {
+            if !matches!(*b, b' ' | b'\t' | b'\n') {
+                break;
+            }
+            s = r;
+        }
+        s
+    }
+}