Commit bd64bf0e47e75481569dcc3ba519e3d2e7f7b276 | zig

author	Andrew Kelley <andrew@ziglang.org> 2025-07-18 10:42:24-07:00
committer	Andrew Kelley <andrew@ziglang.org> 2025-07-19 19:57:37-07:00
log	bd64bf0e47e75481569dcc3ba519e3d2e7f7b276
tree	a5c3fc1aadc5c0860be69ec3d0423d701d2db8da
parent	83d1f88ac5f053f11b91d9c3d51f5c63355b8ca3

std.mem: add byteSwapAllElements

1 files changed, 20 insertions(+), 16 deletions(-)

lib
- std
  - mem.zig

lib/std/mem.zig+20-16

 @@ -2179,22 +2179,8 @@ pub fn byteSwapAllFields(comptime S: type, ptr: *S) void {
             const BackingInt = std.meta.Int(.unsigned, @bitSizeOf(S));
             ptr.* = @bitCast(@byteSwap(@as(BackingInt, @bitCast(ptr.*))));
         },
-        .array => {
+        .array => |info| {
-            for (ptr) |*item| {
+            byteSwapAllElements(info.child, ptr);
-                switch (@typeInfo(@TypeOf(item.*))) {
-                    .@"struct", .@"union", .array => byteSwapAllFields(@TypeOf(item.*), item),
-                    .@"enum" => {
-                        item.* = @enumFromInt(@byteSwap(@intFromEnum(item.*)));
-                    },
-                    .bool => {},
-                    .float => |float_info| {
-                        item.* = @bitCast(@byteSwap(@as(std.meta.Int(.unsigned, float_info.bits), @bitCast(item.*))));
-                    },
-                    else => {
-                        item.* = @byteSwap(item.*);
-                    },
-                }
-            }
         },
         else => {
             ptr.* = @byteSwap(ptr.*);
 @@ -2258,6 +2244,24 @@ test byteSwapAllFields {
     }, k);
 }
+pub fn byteSwapAllElements(comptime Elem: type, slice: []Elem) void {
+    for (slice) |*elem| {
+        switch (@typeInfo(@TypeOf(elem.*))) {
+            .@"struct", .@"union", .array => byteSwapAllFields(@TypeOf(elem.*), elem),
+            .@"enum" => {
+                elem.* = @enumFromInt(@byteSwap(@intFromEnum(elem.*)));
+            },
+            .bool => {},
+            .float => |float_info| {
+                elem.* = @bitCast(@byteSwap(@as(std.meta.Int(.unsigned, float_info.bits), @bitCast(elem.*))));
+            },
+            else => {
+                elem.* = @byteSwap(elem.*);
+            },
+        }
+    }
+}
 /// Returns an iterator that iterates over the slices of `buffer` that are not
 /// any of the items in `delimiters`.
 ///