/* TODO: typed object support */
static void
amf0_encode_table_as_object(amf_buf *buf, lua_State *L, int idx, int ridx)
{
size_t key_len;
const char *key;
amf_buf_append_char(buf, AMF0_OBJECT);
for (lua_pushnil(L); lua_next(L, idx); lua_pop(L, 1)) {
switch (lua_type(L, -2)) {
case LUA_TNUMBER:
lua_pushvalue(L, -2);
key = lua_tolstring(L, -1, &key_len);
amf_buf_append_u16(buf, (uint16_t)key_len);
amf_buf_append(buf, key, key_len);
lua_pop(L, 1);
break;
case LUA_TSTRING:
key = lua_tolstring(L, -2, &key_len);
amf_buf_append_u16(buf, (uint16_t)key_len);
amf_buf_append(buf, key, key_len);
break;
default: continue;
}
amf0_encode(L, buf, 0, -1, ridx);
}
amf_buf_append_u16(buf, (uint16_t)0);
amf_buf_append_char(buf, AMF0_END_OF_OBJECT);
}
static void
encode_hdr(lua_State *L, amf_buf *buf, int ver)
{
if(!lua_istable(L, -1)) {
luaL_error(L, "invalid header structure, must be a dense table");
}
/* name */
lua_rawgeti(L, -1, 1);
size_t len;
const char *name = lua_tolstring(L, -1, &len);
amf_buf_append_u16(buf, (uint16_t)len);
if (len > 0)
amf_buf_append(buf, name, (uint16_t)len);
lua_pop(L, 1);
/* must understand */
lua_rawgeti(L, -1, 2);
int mu = lua_toboolean(L, -1);
amf_buf_append_char(buf, (char)mu);
lua_pop(L, 1);
/* content length */
amf_buf_append_u32(buf, (uint32_t)0);
lua_rawgeti(L, -1, 3);
lua_newtable(L);
amf0_encode(L, buf, (ver == 3), -2, lua_gettop(L));
lua_pop(L, 2); /* pops the obj and ref table */
}
int
lua_amf_encode(lua_State *L)
{
int ver, freebuf = 1;
amf_buf *buf;
if (lua_isnumber(L, 1)) {
ver = luaL_checkint(L, 1);
check_amf_ver(ver, 1);
luaL_checkany(L, 2);
buf = amf_buf_init(NULL);
} else {
buf = luaL_checkudata(L, 1, "amf_buffer");
ver = luaL_checkint(L, 2);
check_amf_ver(ver, 2);
luaL_checkany(L, 3);
freebuf = 0;
}
if (buf == NULL) {
lua_pushnil(L);
return 1;
}
int base = lua_gettop(L);
if (ver == AMF_VER0) {
lua_newtable(L);
amf0_encode(L, buf, 0, base, base+1);
} else {
lua_newtable(L);
lua_newtable(L);
lua_newtable(L);
amf3_encode(L, buf, base, base+1, base+2, base+3);
}
if (freebuf) {
lua_pushlstring(L, buf->b, buf->len);
amf_buf_free(buf);
return 1;
} else {
return 0;
}
}
static void
amf0_encode_table_as_array(amf_buf *buf, lua_State *L, int idx, int ridx, int len)
{
amf_buf_append_char(buf, AMF0_STRICT_ARRAY);
amf_buf_append_u32(buf, (uint32_t)len); // array count
for (int i = 1; i <= len; i++) {
lua_pushinteger(L, i);
lua_gettable(L, idx);
amf0_encode(L, buf, 0, -1, ridx);
lua_pop(L, 1);
}
}
static void
encode_body(lua_State *L, amf_buf *buf, int ver)
{
if(!lua_istable(L, -1)) {
luaL_error(L, "invalid body structure, must be a dense table");
}
size_t len;
const char *uri;
/* target uri */
lua_rawgeti(L, -1, 1);
uri = lua_tolstring(L, -1, &len);
amf_buf_append_u16(buf, (uint16_t)len);
if (len > 0) {
amf_buf_append(buf, uri, (uint16_t)len);
printf("target: %s\n", uri);
}
lua_pop(L, 1);
/* response uri */
lua_rawgeti(L, -1, 2);
uri = lua_tolstring(L, -1, &len);
amf_buf_append_u16(buf, (uint16_t)len);
if (len > 0) {
amf_buf_append(buf, uri, (uint16_t)len);
printf("response: %s\n", uri);
}
lua_pop(L, 1);
/* content length */
amf_buf_append_u32(buf, (uint32_t)0);
lua_rawgeti(L, -1, 3);
lua_newtable(L);
amf0_encode(L, buf, (ver == 3), -2, lua_gettop(L));
lua_pop(L, 2); /* pops the obj and ref table */
}
