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/*
** require("upb.pb") -- A Lua extension for upb.pb.
**
** Exposes all the types defined in upb/pb/{*}.h
** Also defines a few convenience functions on top.
*/
#include "upb/bindings/lua/upb.h"
#include "upb/decode.h"
#include "upb/encode.h"
#define LUPB_PBDECODERMETHOD "lupb.pb.decodermethod"
static int lupb_pb_decode(lua_State *L) {
size_t len;
const upb_msglayout *layout;
upb_msg *msg = lupb_msg_checkmsg2(L, 1, &layout);
const char *pb = lua_tolstring(L, 2, &len);
upb_decode(pb, len, msg, layout);
/* TODO(haberman): check for error. */
return 0;
}
static int lupb_pb_encode(lua_State *L) {
const upb_msglayout *layout;
const upb_msg *msg = lupb_msg_checkmsg2(L, 1, &layout);
upb_arena *arena = upb_arena_new();
size_t size;
char *result;
result = upb_encode(msg, (const void*)layout, arena, &size);
/* Free resources before we potentially bail on error. */
lua_pushlstring(L, result, size);
upb_arena_free(arena);
/* TODO(haberman): check for error. */
return 1;
}
static const struct luaL_Reg toplevel_m[] = {
{"decode", lupb_pb_decode},
{"encode", lupb_pb_encode},
{NULL, NULL}
};
int luaopen_upb_pb_c(lua_State *L) {
static char module_key;
if (lupb_openlib(L, &module_key, "upb.pb_c", toplevel_m)) {
return 1;
}
return 1;
}
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