[extregs] initial commit.HEADmain

added a bunch of useful extregs

1 files changed, 16 insertions, 0 deletions

diff --git a/lua/extregs/uuid.lua b/lua/extregs/uuid.lua
new file mode 100644
index 0000000..e23a37f
--- /dev/null
+++ b/lua/extregs/uuid.lua
@@ -0,0 +1,16 @@
+local util = require('extregs.util')
+local M = {}
+function M.get_provider(_)
+  return util.readonly(function()
+    local bytes = vim.uv.random(16)
+    assert(bytes and #bytes == 16, 'unable to obtain random bytes')
+    local b = { bytes:byte(1, 16) }
+    b[7] = (b[7] % 16) + 64
+    b[9] = (b[9] % 64) + 128
+    local h = {}
+    for i = 1, 16 do h[i] = string.format('%%02x', b[i]) end
+    return table.concat(h, '', 1, 4) .. '-' .. table.concat(h, '', 5, 6) .. '-' ..
+      table.concat(h, '', 7, 8) .. '-' .. table.concat(h, '', 9, 10) .. '-' .. table.concat(h, '', 11, 16)
+  end)
+end
+return M