src/utils.zig

@@ -0,0 +1,23 @@
+const std = @import("std");
+const Io = std.Io;
+const File = Io.File;
+const Allocator = std.mem.Allocator;
+const ArenaAllocator = std.heap.ArenaAllocator;
+const ArrayList = std.ArrayList;
+const StringArrayHashMap = std.StringArrayHashMapUnmanaged;
+
+pub fn sanitizePath(alloc: Allocator, path: []const u8) ![]const u8 {
+    const clean = try alloc.alloc(u8, path.len);
+    var list = ArrayList(u8).initBuffer(clean);
+    var pit = std.mem.splitScalar(u8, path, '/');
+    while (pit.next()) |part| {
+        if (part.len == 0) continue;
+        if (std.mem.eql(u8, part, "..")) continue;
+        // This should never actually allocate
+        try list.appendSlice(alloc, part);
+        try list.append(alloc, '/');
+    }
+    const new_len = list.items.len - 1;
+    _ = alloc.resize(clean, new_len);
+    return clean[0..new_len];
+}