From 71b7dd641892dd302cf37c270c472248b24ef8a4 Mon Sep 17 00:00:00 2001
From: Tobiasz Laskowski <tobil4sk@outlook.com>
Date: Mon, 24 Feb 2025 21:20:56 +0000
Subject: Add vendored lua compat53 v0.14.4

---
 src/compat53/file_mt.lua | 71 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 src/compat53/file_mt.lua

(limited to 'src/compat53/file_mt.lua')

diff --git a/src/compat53/file_mt.lua b/src/compat53/file_mt.lua
new file mode 100644
index 00000000..6433619d
--- /dev/null
+++ b/src/compat53/file_mt.lua
@@ -0,0 +1,71 @@
+local lua_version = _VERSION:sub(-3)
+
+local M = {}
+
+local unpack = lua_version == "5.1" and unpack or table.unpack
+
+local function addasterisk(fmt)
+   if type(fmt) == "string" and fmt:sub(1, 1) ~= "*" then
+      return "*"..fmt
+   else
+      return fmt
+   end
+end
+
+function M.update_file_meta(file_meta, is_luajit52)
+
+   -- make '*' optional for file:read and file:lines
+
+   local file_lines = file_meta.__index.lines
+   file_meta.__index.lines = function(self, ...)
+      local n = select('#', ...)
+      for i = 1, n do
+         local a = select(i, ...)
+         local b = addasterisk(a)
+         -- as an optimization we only allocate a table for the
+         -- modified format arguments when we have a '*' somewhere
+         if a ~= b then
+            local args = { ... }
+            args[i] = b
+            for j = i+1, n do
+               args[j] = addasterisk(args[j])
+            end
+            return file_lines(self, unpack(args, 1, n))
+         end
+      end
+      return file_lines(self, ...)
+   end
+
+   local file_read = file_meta.__index.read
+   file_meta.__index.read = function(self, ...)
+      local n = select('#', ...)
+      for i = 1, n do
+         local a = select(i, ...)
+         local b = addasterisk(a)
+         -- as an optimization we only allocate a table for the
+         -- modified format arguments when we have a '*' somewhere
+         if a ~= b then
+            local args = { ... }
+            args[i] = b
+            for j = i+1, n do
+               args[j] = addasterisk(args[j])
+            end
+            return file_read(self, unpack(args, 1, n))
+         end
+      end
+      return file_read(self, ...)
+   end
+
+   if not is_luajit52 then
+      local file_write = file_meta.__index.write
+      file_meta.__index.write = function(self, ...)
+         local ret, err = file_write(self, ...)
+         if ret then
+            return self
+         end
+         return ret, err
+      end
+   end
+end
+
+return M
-- 
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