Merge pull request #657 from takase1121/plugin_api_h_fix
fixing native plugin API
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Adam
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@ -22,6 +22,7 @@ Various scripts and configurations used to configure, build, and package Lite XL
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and run Lite XL, mainly useful for CI and documentation purpose.
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Preferably not to be used in user systems.
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- **fontello-config.json**: Used by the icons generator.
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- **generate_header.sh**: Generates a header file for native plugin API
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- **keymap-generator**: Generates a JSON file containing the keymap
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[1]: https://github.com/LinusU/node-appdmg
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@ -0,0 +1,144 @@
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#!/bin/bash
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##### CONFIG
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# symbols to ignore
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IGNORE_SYM='luaL_pushmodule\|luaL_openlib'
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##### CONFIG
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# https://stackoverflow.com/a/13062682
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uncomment() {
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[ $# -eq 2 ] && arg="$1" || arg=""
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eval file="\$$#"
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sed 's/a/aA/g; s/__/aB/g; s/#/aC/g' "$file" | \
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gcc -P -E $arg - | \
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sed 's/aC/#/g; s/aB/__/g; s/aA/a/g'
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}
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# this is the magic that turns multiline statements into
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# single line statements
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# LITERALLY DOES NOT WORK WITH PREPROCESSOR
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onelineize() {
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grep -v '^#' | sed -e ':r;$!{N;br};s/\([^{;]\)\n\s*/\1 /g'
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}
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discard_preprocessors() {
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grep -v '#\(include\|if\|endif\)'
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}
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# sed regex for extracting data from function signature
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# if this isn't regex, idk what is
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# LUA_API (return type as \2) (function name as \3) (args as \4)
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sym_regex='^LUA\(LIB\)\?_API\s\+\([^(]\+\)\s*(\([^)]\+\))\s\+(\([^)]\+\));'
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# get funcptr declarations
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ptrize() {
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grep '^LUA' | grep -v "$IGNORE_SYM" | sed -e "s/$sym_regex/static\t\2(*\3)\t(\4);/"
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}
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# create a stub function that warns user when calling it
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makestub() {
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grep '^LUA' | grep -v "$IGNORE_SYM" | sed -e "s/$sym_regex/static\t\2\t__lite_xl_fallback_\3\t(\4) { fputs(\"warning: \3 is a stub\", stderr); }/"
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}
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import_sym() {
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grep '^LUA' | grep -v "$IGNORE_SYM" | sed -e "s/$sym_regex/\tIMPORT_SYMBOL(\3, \2, \4);/"
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}
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decl() {
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echo "/** $(basename "$1") **/"
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echo
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header="$(uncomment $1 | discard_preprocessors)"
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header1="$(onelineize <<< "$header")"
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# typedef
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grep -v '^\(LUA\|#\|extern\)' <<< "$header1"
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# funcptrs
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ptrize <<< "$header1"
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# defines
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(grep '^#' | grep -v "$IGNORE_SYM") <<< "$header"
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# stubs
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makestub <<< "$header1"
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}
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decl_import() {
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uncomment $1 | onelineize | import_sym
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}
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generate_header() {
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local LUA_PATH="$1"
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echo "#ifndef LITE_XL_PLUGIN_API"
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echo "#define LITE_XL_PLUGIN_API"
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echo "/**"
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echo "The lite_xl plugin API is quite simple. Any shared library can be a plugin file, so long"
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echo "as it has an entrypoint that looks like the following, where xxxxx is the plugin name:"
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echo '#include "lite_xl_plugin_api.h"'
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echo "int lua_open_lite_xl_xxxxx(lua_State* L, void* XL) {"
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echo " lite_xl_plugin_init(XL);"
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echo " ..."
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echo " return 1;"
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echo "}"
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echo "In linux, to compile this file, you'd do: 'gcc -o xxxxx.so -shared xxxxx.c'. Simple!"
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echo "Due to the way the API is structured, you *should not* link or include lua libraries."
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echo "This file was automatically generated. DO NOT MODIFY DIRECTLY."
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echo "**/"
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echo
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echo
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echo "#include <stdarg.h>"
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echo "#include <stdio.h> // for BUFSIZ? this is kinda weird"
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echo
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echo "/** luaconf.h **/"
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echo
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uncomment "$LUA_PATH/luaconf.h"
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echo
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decl "$LUA_PATH/lua.h"
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echo
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decl "$LUA_PATH/lauxlib.h"
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echo
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echo "#define IMPORT_SYMBOL(name, ret, ...) name = (name = (ret (*) (__VA_ARGS__)) symbol(#name), name == NULL ? &__lite_xl_fallback_##name : name)"
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echo "static void lite_xl_plugin_init(void *XL) {"
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echo -e "\tvoid* (*symbol)(const char *) = (void* (*) (const char *)) XL;"
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decl_import "$LUA_PATH/lua.h"
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decl_import "$LUA_PATH/lauxlib.h"
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echo "}"
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echo "#endif"
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}
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show_help() {
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echo -e "Usage: $0 <OPTIONS> prefix"
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echo
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echo -e "Available options:"
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echo -e "-p\t--prefix\tSet prefix (where to find lua.h and lauxlib.h)"
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}
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main() {
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local prefix=""
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for i in "$@"; do
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case $i in
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-h|--help)
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show_help
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exit 0
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;;
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-p|--prefix)
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prefix="$2"
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shift
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shift
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;;
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*)
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;;
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esac
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done
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generate_header "$prefix"
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}
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main "$@"
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# create a stub function that warns user when calling it
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@ -691,42 +691,49 @@ static int f_set_window_opacity(lua_State *L) {
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return 1;
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}
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// Symbol table for native plugin loading. Allows for a statically
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// bound lua library to be used by native plugins.
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typedef struct {
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const char* symbol;
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void* address;
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typedef struct lua_function_node {
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const char *symbol;
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void *address;
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} lua_function_node;
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#define P(FUNC) { "lua_" #FUNC, (void*)(lua_##FUNC) }
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#define U(FUNC) { "luaL_" #FUNC, (void*)(luaL_##FUNC) }
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static void* api_require(const char* symbol) {
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static lua_function_node nodes[] = {
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P(absindex), P(arith), P(atpanic), P(callk), P(checkstack),
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P(close), P(compare), P(concat), P(copy), P(createtable), P(dump),
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P(error), P(gc), P(getallocf), P(getctx), P(getfield), P(getglobal),
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P(atpanic), P(checkstack),
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P(close), P(concat), P(copy), P(createtable), P(dump),
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P(error), P(gc), P(getallocf), P(getfield),
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P(gethook), P(gethookcount), P(gethookmask), P(getinfo), P(getlocal),
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P(getmetatable), P(getstack), P(gettable), P(gettop), P(getupvalue),
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P(getuservalue), P(insert), P(isnumber), P(isstring), P(isuserdata),
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P(len), P(load), P(newstate), P(newthread), P(newuserdata), P(next),
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P(pcallk), P(pushboolean), P(pushcclosure), P(pushfstring), P(pushinteger),
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P(insert), P(isnumber), P(isstring), P(isuserdata),
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P(load), P(newstate), P(newthread), P(newuserdata), P(next),
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P(pushboolean), P(pushcclosure), P(pushfstring), P(pushinteger),
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P(pushlightuserdata), P(pushlstring), P(pushnil), P(pushnumber),
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P(pushstring), P(pushthread), P(pushunsigned), P(pushvalue),
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P(pushvfstring), P(rawequal), P(rawget), P(rawgeti), P(rawgetp), P(rawlen),
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P(rawset), P(rawseti), P(rawsetp), P(remove), P(replace), P(resume),
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P(setallocf), P(setfield), P(setglobal), P(sethook), P(setlocal),
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P(setmetatable), P(settable), P(settop), P(setupvalue), P(setuservalue),
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P(pushstring), P(pushthread), P(pushvalue),
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P(pushvfstring), P(rawequal), P(rawget), P(rawgeti),
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P(rawset), P(rawseti), P(remove), P(replace), P(resume),
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P(setallocf), P(setfield), P(sethook), P(setlocal),
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P(setmetatable), P(settable), P(settop), P(setupvalue),
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P(status), P(tocfunction), P(tointegerx), P(tolstring), P(toboolean),
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P(tonumberx), P(topointer), P(tothread), P(tounsignedx), P(touserdata),
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P(tonumberx), P(topointer), P(tothread), P(touserdata),
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P(type), P(typename), P(upvalueid), P(upvaluejoin), P(version), P(xmove),
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P(yieldk), U(checkversion_), U(getmetafield), U(callmeta), U(tolstring),
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U(argerror), U(checknumber), U(optnumber), U(checkinteger),
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U(checkunsigned), U(checkstack), U(checktype), U(checkany),
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U(getmetafield), U(callmeta), U(argerror), U(checknumber), U(optnumber),
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U(checkinteger), U(checkstack), U(checktype), U(checkany),
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U(newmetatable), U(setmetatable), U(testudata), U(checkudata), U(where),
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U(error), U(fileresult), U(execresult), U(ref), U(unref), U(loadstring),
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U(newstate), U(len), U(setfuncs), U(getsubtable), U(buffinit),
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U(prepbuffsize), U(addlstring), U(addstring), U(addvalue), U(pushresult),
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U(pushresultsize), U(buffinitsize)
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U(newstate), U(setfuncs), U(buffinit), U(addlstring), U(addstring),
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U(addvalue), U(pushresult),
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#if LUA_VERSION_NUM >= 502
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P(absindex), P(arith), P(callk), P(compare), P(getctx), P(getglobal), P(getuservalue),
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P(len), P(pcallk), P(pushunsigned), P(rawgetp), P(rawlen), P(rawsetp), P(setglobal),
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P(iscfunction), P(setuservalue), P(tounsignedx), P(yieldk),
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U(checkversion_), U(tolstring), U(checkunsigned), U(len), U(getsubtable), U(prepbuffsize),
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U(pushresultsize), U(buffinitsize), U(checklstring), U(checkoption), U(gsub), U(loadbufferx),
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U(loadfilex), U(optinteger), U(optlstring), U(optunsigned), U(requiref), U(traceback)
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#else
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P(objlen)
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#endif
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};
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for (int i = 0; i < sizeof(nodes) / sizeof(lua_function_node); ++i) {
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if (strcmp(nodes[i].symbol, symbol) == 0)
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