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LuCI Core C-Rewrite: First steps

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Steven Barth 2008-11-19 23:02:36 +00:00
parent 9d6096a5f4
commit 40639695cb
3 changed files with 424 additions and 0 deletions
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218
.cproject Normal file
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66
.project
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140
libs/core/src/luci_cutil.c Normal file
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/**
* LuCI Core - Utility library
* Copyright (C) 2008 Steven Barth <steven@midlink.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "lauxlib.h"
#define LUCI_MODNAME "luci.cutil"
#define LUCI_MODDESC "LuCI Core Utility Library"
#define LUCI_MODCOPY "2008 Steven Barth"
/* Pythonic overloaded MOD operator */
static int luci__string_mod(lua_State *L) {
int i, n=1;
luaL_checkstring(L, 1);
luaL_checkany(L, 2);
/* Discard further arguments */
lua_settop(L, 2);
/* Get format and push it to the bottom of the stack */
lua_pushliteral(L, "");
lua_getfield(L, -1, "format");
lua_insert(L, 1);
lua_pop(L, 1);
/* If second argument is a table, unpack it */
if (lua_istable(L, 3)) {
n = luaL_getn(L, 3);
if (n > 0) {
luaL_checkstack(L, n, "too many results to unpack");
for (i=1; i<=n; i++) {
lua_rawgeti(L, 3, i);
}
} else {
n = 0;
}
lua_remove(L, 3);
}
lua_call(L, n+1, 1);
return 1;
}
/* Instantiate a class */
static int luci__instantiate(lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
/* Create the object */
lua_newtable(L);
/* Create the metatable */
lua_createtable(L, 0, 1);
lua_pushvalue(L, 1);
lua_setfield(L, -2, "__index");
lua_setmetatable(L, -2);
/* Move instance at the bottom of the stack */
lua_replace(L, 1);
/* Invoke constructor if it exists */
lua_getfield(L, 1, "__init__");
if (lua_isfunction(L, -1)) {
/* Put instance at the bottom for the 2nd time */
lua_pushvalue(L, 1);
lua_insert(L, 1);
/* Call constructor */
lua_insert(L, 2);
lua_call(L, lua_gettop(L)-2, 0);
}
lua_settop(L, 1);
return 1;
}
/* luci.cutil.class(baseclass) */
static int luci_class(lua_State *L) {
/* Create class */
lua_newtable(L);
/* Create metatable and register parent class if any */
if (lua_istable(L, 1)) {
lua_createtable(L, 0, 2);
lua_pushvalue(L, 1);
lua_setfield(L, -2, "__index");
} else {
lua_createtable(L, 0, 1);
}
/* Set instantiator */
lua_pushcfunction(L, luci__instantiate);
lua_setfield(L, -2, "__call");
lua_setmetatable(L, -2);
return 1;
}
/* Registry */
static const luaL_Reg registry[] = {
{"class", luci_class},
{ NULL, NULL },
};
/* Registrator */
LUALIB_API int luaopen_luci_cutil(lua_State *L) {
luaL_register(L, LUCI_MODNAME, registry);
lua_pushliteral(L, LUCI_MODDESC);
lua_setfield(L, -2, "_DESCRIPTION");
lua_pushliteral(L, LUCI_MODCOPY);
lua_setfield(L, -2, "_COPYRIGHT");
/* Register pythonic printf string operator */
lua_pushliteral(L, "");
lua_getmetatable(L, -1);
lua_pushcfunction(L, luci__string_mod);
lua_setfield(L, -2, "__mod");
lua_pop(L, 2);
return 1;
}