1 files changed, 76 insertions, 0 deletions
diff --git a/vendor/handlebars/src/support.rs b/vendor/handlebars/src/support.rs
new file mode 100644
index 000000000..bd5564d32
--- /dev/null
+++ b/vendor/handlebars/src/support.rs
@@ -0,0 +1,76 @@
+pub mod str {
+    use std::io::{Result, Write};
+
+    #[derive(Debug)]
+    pub struct StringWriter {
+        buf: Vec<u8>,
+    }
+
+    impl Default for StringWriter {
+        fn default() -> Self {
+            Self::new()
+        }
+    }
+
+    impl StringWriter {
+        pub fn new() -> StringWriter {
+            StringWriter {
+                buf: Vec::with_capacity(8 * 1024),
+            }
+        }
+
+        pub fn into_string(self) -> String {
+            if let Ok(s) = String::from_utf8(self.buf) {
+                s
+            } else {
+                String::new()
+            }
+        }
+    }
+
+    impl Write for StringWriter {
+        fn write(&mut self, buf: &[u8]) -> Result<usize> {
+            self.buf.extend_from_slice(buf);
+            Ok(buf.len())
+        }
+
+        fn flush(&mut self) -> Result<()> {
+            Ok(())
+        }
+    }
+
+    /// See https://github.com/handlebars-lang/handlebars.js/blob/37411901da42200ced8e1a7fc2f67bf83526b497/lib/handlebars/utils.js#L1
+    pub fn escape_html(s: &str) -> String {
+        let mut output = String::new();
+        for c in s.chars() {
+            match c {
+                '<' => output.push_str("&lt;"),
+                '>' => output.push_str("&gt;"),
+                '"' => output.push_str("&quot;"),
+                '&' => output.push_str("&amp;"),
+                '\'' => output.push_str("&#x27;"),
+                '`' => output.push_str("&#x60;"),
+                '=' => output.push_str("&#x3D;"),
+                _ => output.push(c),
+            }
+        }
+        output
+    }
+
+    #[cfg(test)]
+    mod test {
+        use crate::support::str::StringWriter;
+        use std::io::Write;
+
+        #[test]
+        fn test_string_writer() {
+            let mut sw = StringWriter::new();
+
+            let _ = sw.write("hello".to_owned().into_bytes().as_ref());
+            let _ = sw.write("world".to_owned().into_bytes().as_ref());
+
+            let s = sw.into_string();
+            assert_eq!(s, "helloworld".to_string());
+        }
+    }
+}