From cc334b4ee2c8dcceba4f8c6739207f5ddfa6a358 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Sun, 20 Jul 2025 20:54:15 -0700
Subject: [PATCH] std.tar.Writer: fix 32-bit

---
 lib/std/tar/Writer.zig | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lib/std/tar/Writer.zig b/lib/std/tar/Writer.zig
index 78baa69d84..4c41251d05 100644
--- a/lib/std/tar/Writer.zig
+++ b/lib/std/tar/Writer.zig
@@ -55,7 +55,7 @@ pub fn writeFile(
 
     try w.underlying_writer.writeAll(@ptrCast((&header)[0..1]));
     _ = try w.underlying_writer.sendFileAll(file_reader, .unlimited);
-    try w.writePadding(size);
+    try w.writePadding64(size);
 }
 
 pub const WriteFileStreamError = Error || std.Io.Reader.StreamError;
@@ -71,7 +71,7 @@ pub fn writeFileStream(
 ) WriteFileStreamError!void {
     try w.writeHeader(.regular, sub_path, "", size, options);
     try reader.streamExact64(w.underlying_writer, size);
-    try w.writePadding(size);
+    try w.writePadding64(size);
 }
 
 /// Writes file using bytes buffer `content` for size and file content.
@@ -172,7 +172,14 @@ fn writeExtendedHeader(w: *Writer, typeflag: Header.FileType, buffers: []const [
 }
 
 fn writePadding(w: *Writer, bytes: usize) std.Io.Writer.Error!void {
-    const pos = bytes % block_size;
+    return writePaddingPos(w, bytes % block_size);
+}
+
+fn writePadding64(w: *Writer, bytes: u64) std.Io.Writer.Error!void {
+    return writePaddingPos(w, @intCast(bytes % block_size));
+}
+
+fn writePaddingPos(w: *Writer, pos: usize) std.Io.Writer.Error!void {
     if (pos == 0) return;
     try w.underlying_writer.splatByteAll(0, block_size - pos);
 }