Merging upstream version 1.71.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/vendor/object/src/write/util.rs b/vendor/object/src/write/util.rs
index 51bc3515f..b05b14d92 100644
--- a/vendor/object/src/write/util.rs
+++ b/vendor/object/src/write/util.rs
@@ -164,6 +164,56 @@ impl<'a> BytesMut for &'a mut [u8] {
     }
 }
 
+/// Write an unsigned number using the LEB128 encoding to a buffer.
+///
+/// Returns the number of bytes written.
+pub(crate) fn write_uleb128(buf: &mut Vec<u8>, mut val: u64) -> usize {
+    let mut len = 0;
+    loop {
+        let mut byte = (val & 0x7f) as u8;
+        val >>= 7;
+        let done = val == 0;
+        if !done {
+            byte |= 0x80;
+        }
+
+        buf.push(byte);
+        len += 1;
+
+        if done {
+            return len;
+        }
+    }
+}
+
+/// Write a signed number using the LEB128 encoding to a buffer.
+///
+/// Returns the number of bytes written.
+#[allow(dead_code)]
+pub(crate) fn write_sleb128<W>(buf: &mut Vec<u8>, mut val: i64) -> usize {
+    let mut len = 0;
+    loop {
+        let mut byte = val as u8;
+        // Keep the sign bit for testing
+        val >>= 6;
+        let done = val == 0 || val == -1;
+        if done {
+            byte &= !0x80;
+        } else {
+            // Remove the sign bit
+            val >>= 1;
+            byte |= 0x80;
+        }
+
+        buf.push(byte);
+        len += 1;
+
+        if done {
+            return len;
+        }
+    }
+}
+
 pub(crate) fn align(offset: usize, size: usize) -> usize {
     (offset + (size - 1)) & !(size - 1)
 }