api: auto generate api function wrappers for viml

scripts/geneval.lua

@@ -1,5 +1,8 @@
+mpack = require('mpack')
+
 local nvimsrcdir = arg[1]
 local autodir = arg[2]
+local metadata_file = arg[3]
 
 if nvimsrcdir == '--help' then
   print([[
@@ -18,9 +21,20 @@ local funcsfname = autodir .. '/funcs.generated.h'
 
 local funcspipe = io.open(funcsfname .. '.hsh', 'w')
 
-local funcs = require('eval')
+local funcs = require('eval').funcs
 
-for name, def in pairs(funcs.funcs) do
+local metadata = mpack.unpack(io.open(arg[3], 'rb'):read("*all"))
+
+for i,fun in ipairs(metadata) do
+  funcs['api_'..fun.name] = {
+    args=#fun.parameters,
+    func='api_wrapper',
+    data='handle_'..fun.name,
+  }
+end
+
+
+for name, def in pairs(funcs) do
   args = def.args or 0
   if type(args) == 'number' then
     args = {args, args}
@@ -28,7 +42,8 @@ for name, def in pairs(funcs.funcs) do
     args[2] = 'MAX_FUNC_ARGS'
   end
   func = def.func or ('f_' .. name)
-  local val = ('{ %s, %s, &%s }'):format(args[1], args[2], func)
+  data = def.data or "NULL"
+  local val = ('{ %s, %s, &%s, %s }'):format(args[1], args[2], func, data)
   funcspipe:write(name .. '\n' .. val .. '\n')
 end
 funcspipe:close()