113 lines
3.9 KiB
C
113 lines
3.9 KiB
C
// Protocol Buffers - Google's data interchange format
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// Copyright 2023 Google LLC. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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/*
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* Shared definitions for upb Lua modules.
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*/
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#ifndef UPB_LUA_UPB_H_
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#define UPB_LUA_UPB_H_
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#include "lauxlib.h"
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#include "upb/message/message.h"
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#include "upb/reflection/def.h"
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#include "upb/reflection/message.h"
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/* Lua changes its API in incompatible ways in every minor release.
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* This is some shim code to paper over the differences. */
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#if LUA_VERSION_NUM == 501
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#define lua_rawlen lua_objlen
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#define lua_setuservalue(L, idx) lua_setfenv(L, idx)
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#define lua_getuservalue(L, idx) lua_getfenv(L, idx)
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#define lupb_setfuncs(L, l) luaL_register(L, NULL, l)
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#elif LUA_VERSION_NUM >= 502 && LUA_VERSION_NUM <= 504
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#define lupb_setfuncs(L, l) luaL_setfuncs(L, l, 0)
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#else
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#error Only Lua 5.1-5.4 are supported
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#endif
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/* Create a new userdata with the given type and |n| uservals, which are popped
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* from the stack to initialize the userdata. */
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void* lupb_newuserdata(lua_State* L, size_t size, int n, const char* type);
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#if LUA_VERSION_NUM < 504
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/* Polyfills for this Lua 5.4 function. Pushes userval |n| for the userdata at
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* |index|. */
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int lua_setiuservalue(lua_State* L, int index, int n);
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int lua_getiuservalue(lua_State* L, int index, int n);
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#endif
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/* Registers a type with the given name, methods, and metamethods. */
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void lupb_register_type(lua_State* L, const char* name, const luaL_Reg* m,
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const luaL_Reg* mm);
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/* Checks the given upb_Status and throws a Lua error if it is not ok. */
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void lupb_checkstatus(lua_State* L, upb_Status* s);
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int luaopen_lupb(lua_State* L);
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/* C <-> Lua value conversions. ***********************************************/
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/* Custom check/push functions. Unlike the Lua equivalents, they are pinned to
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* specific C types (instead of lua_Number, etc), and do not allow any implicit
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* conversion or data loss. */
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int64_t lupb_checkint64(lua_State* L, int narg);
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int32_t lupb_checkint32(lua_State* L, int narg);
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uint64_t lupb_checkuint64(lua_State* L, int narg);
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uint32_t lupb_checkuint32(lua_State* L, int narg);
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double lupb_checkdouble(lua_State* L, int narg);
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float lupb_checkfloat(lua_State* L, int narg);
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bool lupb_checkbool(lua_State* L, int narg);
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const char* lupb_checkstring(lua_State* L, int narg, size_t* len);
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const char* lupb_checkname(lua_State* L, int narg);
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void lupb_pushint64(lua_State* L, int64_t val);
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void lupb_pushint32(lua_State* L, int32_t val);
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void lupb_pushuint64(lua_State* L, uint64_t val);
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void lupb_pushuint32(lua_State* L, uint32_t val);
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/** From def.c. ***************************************************************/
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const upb_MessageDef* lupb_MessageDef_check(lua_State* L, int narg);
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const upb_EnumDef* lupb_EnumDef_check(lua_State* L, int narg);
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const upb_FieldDef* lupb_FieldDef_check(lua_State* L, int narg);
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upb_DefPool* lupb_DefPool_check(lua_State* L, int narg);
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void lupb_MessageDef_pushsubmsgdef(lua_State* L, const upb_FieldDef* f);
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void lupb_def_registertypes(lua_State* L);
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/** From msg.c. ***************************************************************/
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void lupb_pushmsgval(lua_State* L, int container, upb_CType type,
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upb_MessageValue val);
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int lupb_MessageDef_call(lua_State* L);
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upb_Arena* lupb_Arena_pushnew(lua_State* L);
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void lupb_msg_registertypes(lua_State* L);
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#define lupb_assert(L, predicate) \
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if (!(predicate)) \
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luaL_error(L, "internal error: %s, %s:%d ", #predicate, __FILE__, __LINE__);
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#define LUPB_UNUSED(var) (void)var
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#if defined(__GNUC__) || defined(__clang__)
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#define LUPB_UNREACHABLE() \
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do { \
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assert(0); \
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__builtin_unreachable(); \
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} while (0)
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#else
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#define LUPB_UNREACHABLE() \
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do { \
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assert(0); \
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} while (0)
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#endif
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#endif /* UPB_LUA_UPB_H_ */
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