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 */
}
static int
lua_amf_buffer_write_int32(lua_State *L)
{
amf_buf *b = luaL_checkudata(L, 1, "amf_buffer");
int32_t i = luaL_checkint(L, 2);
amf_buf_append_u32(b, i);
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 */
}
static void
amf0_encode_string(amf_buf *b, const char *s, size_t len)
{
uint16_t u16;
uint32_t u32;
if (len < UINT16_MAX) {
u16 = (uint16_t)len;
amf_buf_append_char(b, AMF0_STRING);
amf_buf_append_u16(b, u16);
amf_buf_append(b, s, u16);
} else { // long string
if (len > UINT32_MAX) {
len = UINT32_MAX;
}
u32 = (uint32_t)len;
amf_buf_append_char(b, AMF0_L_STRING);
amf_buf_append_u32(b, u32);
amf_buf_append(b, s, u32);
}
}
