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#include <lighttpd/core_lua.h>
#include <lualib.h>
#include <lauxlib.h>
#define LUA_PHYSICAL "liPhysical*"
typedef int (*lua_Physical_Attrib)(liPhysical *phys, lua_State *L);
#define DEF_LUA_MODIFY_GSTRING(attr) \
static int lua_physical_attr_read_##attr(liPhysical *phys, lua_State *L) { \
lua_pushlstring(L, phys->attr->str, phys->attr->len); \
return 1; \
} \
\
static int lua_physical_attr_write_##attr(liPhysical *phys, lua_State *L) { \
const char *s; size_t len; \
luaL_checkstring(L, 3); \
s = lua_tolstring(L, 3, &len); \
g_string_truncate(phys->attr, 0); \
g_string_append_len(phys->attr, s, len); \
return 0; \
}
DEF_LUA_MODIFY_GSTRING(path)
DEF_LUA_MODIFY_GSTRING(doc_root)
DEF_LUA_MODIFY_GSTRING(pathinfo)
#undef DEF_LUA_MODIFY_GSTRING
#define AR(m) { #m, lua_physical_attr_read_##m, NULL }
#define AW(m) { #m, NULL, lua_physical_attr_write_##m }
#define ARW(m) { #m, lua_physical_attr_read_##m, lua_physical_attr_write_##m }
static const struct {
const char* key;
lua_Physical_Attrib read_attr, write_attr;
} physical_attribs[] = {
ARW(path),
ARW(doc_root),
ARW(pathinfo),
{ NULL, NULL, NULL }
};
#undef AR
#undef AW
#undef ARW
static int lua_physical_index(lua_State *L) {
liPhysical *phys;
const char *key;
int i;
if (lua_gettop(L) != 2) {
lua_pushstring(L, "incorrect number of arguments");
lua_error(L);
}
if (li_lua_metatable_index(L)) return 1;
phys = li_lua_get_physical(L, 1);
if (!phys) return 0;
if (lua_isnumber(L, 2)) return 0;
if (!lua_isstring(L, 2)) return 0;
key = lua_tostring(L, 2);
for (i = 0; physical_attribs[i].key ; i++) {
if (0 == strcmp(key, physical_attribs[i].key)) {
if (physical_attribs[i].read_attr)
return physical_attribs[i].read_attr(phys, L);
break;
}
}
lua_pushstring(L, "cannot read attribute ");
lua_pushstring(L, key);
lua_pushstring(L, " in physical");
lua_concat(L, 3);
lua_error(L);
return 0;
}
static int lua_physical_newindex(lua_State *L) {
liPhysical *phys;
const char *key;
int i;
if (lua_gettop(L) != 3) {
lua_pushstring(L, "incorrect number of arguments");
lua_error(L);
}
phys = li_lua_get_physical(L, 1);
if (!phys) return 0;
if (lua_isnumber(L, 2)) return 0;
if (!lua_isstring(L, 2)) return 0;
key = lua_tostring(L, 2);
for (i = 0; physical_attribs[i].key ; i++) {
if (0 == strcmp(key, physical_attribs[i].key)) {
if (physical_attribs[i].write_attr)
return physical_attribs[i].write_attr(phys, L);
break;
}
}
lua_pushstring(L, "cannot write attribute ");
lua_pushstring(L, key);
lua_pushstring(L, "in physical");
lua_concat(L, 3);
lua_error(L);
return 0;
}
static const luaL_Reg physical_mt[] = {
{ "__index", lua_physical_index },
{ "__newindex", lua_physical_newindex },
{ NULL, NULL }
};
static HEDLEY_NEVER_INLINE void init_physical_mt(lua_State *L) {
luaL_register(L, NULL, physical_mt);
}
static void lua_push_physical_metatable(lua_State *L) {
if (luaL_newmetatable(L, LUA_PHYSICAL)) {
init_physical_mt(L);
}
}
void li_lua_init_physical_mt(lua_State *L) {
lua_push_physical_metatable(L);
lua_pop(L, 1);
}
liPhysical* li_lua_get_physical(lua_State *L, int ndx) {
if (!lua_isuserdata(L, ndx)) return NULL;
if (!lua_getmetatable(L, ndx)) return NULL;
luaL_getmetatable(L, LUA_PHYSICAL);
if (lua_isnil(L, -1) || lua_isnil(L, -2) || !lua_equal(L, -1, -2)) {
lua_pop(L, 2);
return NULL;
}
lua_pop(L, 2);
return *(liPhysical**) lua_touserdata(L, ndx);
}
int li_lua_push_physical(lua_State *L, liPhysical *phys) {
liPhysical **pphys;
if (NULL == phys) {
lua_pushnil(L);
return 1;
}
pphys = (liPhysical**) lua_newuserdata(L, sizeof(liPhysical*));
*pphys = phys;
lua_push_physical_metatable(L);
lua_setmetatable(L, -2);
return 1;
}