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authorDeterminant <[email protected]>2015-05-26 14:06:52 +0800
committerDeterminant <[email protected]>2015-05-26 14:06:52 +0800
commit81bf2d653902860c5d28ccade19ac6e1fd56acaf (patch)
tree831a25c84332ac0839dbe498f61620ea634170e0 /io
parent8c5246a8794011ca0c25f15643771f031d258594 (diff)
add layer and param
Diffstat (limited to 'io')
-rw-r--r--io/init.lua21
-rw-r--r--io/param.c8
2 files changed, 25 insertions, 4 deletions
diff --git a/io/init.lua b/io/init.lua
index 1288bd4..2fa38e6 100644
--- a/io/init.lua
+++ b/io/init.lua
@@ -5,3 +5,24 @@ function nerv.ParamFile:write_chunkdata(metadata, writer)
end
return self:_write_chunkdata(table.tostring(metadata), writer)
end
+
+function nerv.ParamFile:write_param(param)
+ local id = param.id
+ local type = param.__typename
+ if id == nil then
+ nerv_error("id of param %s must be specified", type)
+ end
+ self:write_chunkdata({id = id,
+ type = type,
+ info = param:get_info()}, param)
+end
+
+function nerv.ParamFile:read_param(id)
+ local metadata = self.metadata[id]
+ if metadata == nil then
+ nerv_error("param with id %s does not exist", id)
+ end
+ local param = assert(loadstring("return " .. metadata.type .. "(" .. id .. ")"))()
+ param:set_info(metadata.info)
+ param:read(self:get_chunkdata(id))
+end
diff --git a/io/param.c b/io/param.c
index 627c815..477df28 100644
--- a/io/param.c
+++ b/io/param.c
@@ -220,12 +220,12 @@ int nerv_param_file_write_chunkdata(lua_State *L) {
write_param_metadata(pfh->fp, metadata_str, &status);
CHECK_WRITE(status);
lua_pushvalue(L, 3);
- lua_getfield(L, -1, "save");
+ lua_getfield(L, -1, "write");
if (!lua_isfunction(L, -1))
- nerv_error(L, "\"save\" method must be implemented");
+ nerv_error(L, "\"write\" method must be implemented");
lua_pushvalue(L, -2);
- lua_pushvalue(L, 4); /* pass handle as parameter to save() */
- lua_call(L, 2, 0); /* let the save() to write */
+ lua_pushvalue(L, 4); /* pass handle as parameter to write() */
+ lua_call(L, 2, 0); /* let the write() to write */
lua_pop(L, 1);
size = ftello(pfh->fp) - start;
fseeko(pfh->fp, start, SEEK_SET);