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@@ -1,619 +0,0 @@
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-/*
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-** $Id: lua.c,v 1.230.1.1 2017/04/19 17:29:57 roberto Exp $
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-** Lua stand-alone interpreter
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-** See Copyright Notice in lua.h
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-*/
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-
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-#define lua_c
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-
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-#include "lprefix.h"
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-
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-
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-#include <signal.h>
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-#include <stdio.h>
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-#include <stdlib.h>
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-#include <string.h>
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-
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-#include "lua.h"
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-
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-#include "lauxlib.h"
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-#include "lualib.h"
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-
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-LUALIB_API void luat_openlibs (lua_State *L);
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-
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-// disable readline
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-#if defined(LUA_USE_READLINE)
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-// #undef LUA_USE_READLINE
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-#endif
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-
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-#if !defined(LUA_PROMPT)
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-#define LUA_PROMPT "> "
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-#define LUA_PROMPT2 ">> "
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-#endif
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-
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-#if !defined(LUA_PROGNAME)
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-#define LUA_PROGNAME "lua"
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-#endif
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-
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-#if !defined(LUA_MAXINPUT)
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-#define LUA_MAXINPUT 512
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-#endif
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-
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-#if !defined(LUA_INIT_VAR)
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-#define LUA_INIT_VAR "LUA_INIT"
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-#endif
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-
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-#define LUA_INITVARVERSION LUA_INIT_VAR LUA_VERSUFFIX
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-
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-
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-/*
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-** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
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-** is, whether we're running lua interactively).
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-*/
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-#if !defined(lua_stdin_is_tty) /* { */
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-
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-#if defined(LUA_USE_POSIX) /* { */
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-
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-#include <unistd.h>
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-#define lua_stdin_is_tty() isatty(0)
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-
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-#elif defined(LUA_USE_WINDOWS) /* }{ */
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-
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-#include <io.h>
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-#include <windows.h>
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-
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-#define lua_stdin_is_tty() _isatty(_fileno(stdin))
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-
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-#else /* }{ */
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-
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-/* ISO C definition */
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-#define lua_stdin_is_tty() 1 /* assume stdin is a tty */
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-
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-#endif /* } */
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-
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-#endif /* } */
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-
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-
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-/*
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-** lua_readline defines how to show a prompt and then read a line from
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-** the standard input.
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-** lua_saveline defines how to "save" a read line in a "history".
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-** lua_freeline defines how to free a line read by lua_readline.
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-*/
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-#if !defined(lua_readline) /* { */
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-
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-#if defined(LUA_USE_READLINE) /* { */
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-
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-#include <readline/readline.h>
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-#include <readline/history.h>
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-#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
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-#define lua_saveline(L,line) ((void)L, add_history(line))
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-#define lua_freeline(L,b) ((void)L, free(b))
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-
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-#else /* }{ */
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-
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-#define lua_readline(L,b,p) \
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- ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
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- fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
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-#define lua_saveline(L,line) { (void)L; (void)line; }
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-#define lua_freeline(L,b) { (void)L; (void)b; }
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-
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-#endif /* } */
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-
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-#endif /* } */
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-
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-
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-
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-
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-static lua_State *globalL = NULL;
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-
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-static const char *progname = LUA_PROGNAME;
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-
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-
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-/*
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-** Hook set by signal function to stop the interpreter.
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-*/
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-static void lstop (lua_State *L, lua_Debug *ar) {
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- (void)ar; /* unused arg. */
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- lua_sethook(L, NULL, 0, 0); /* reset hook */
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- luaL_error(L, "interrupted!");
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-}
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-
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-
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-/*
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-** Function to be called at a C signal. Because a C signal cannot
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-** just change a Lua state (as there is no proper synchronization),
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-** this function only sets a hook that, when called, will stop the
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-** interpreter.
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-*/
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-static void laction (int i) {
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- signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
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- lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
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-}
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-
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-
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-static void print_usage (const char *badoption) {
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- lua_writestringerror("%s: ", progname);
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- if (badoption[1] == 'e' || badoption[1] == 'l')
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- lua_writestringerror("'%s' needs argument\n", badoption);
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- else
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- lua_writestringerror("unrecognized option '%s'\n", badoption);
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- lua_writestringerror(
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- "usage: %s [options] [script [args]]\n"
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- "Available options are:\n"
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- " -e stat execute string 'stat'\n"
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- " -i enter interactive mode after executing 'script'\n"
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- " -l name require library 'name' into global 'name'\n"
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- " -v show version information\n"
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- " -E ignore environment variables\n"
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- " -- stop handling options\n"
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- " - stop handling options and execute stdin\n"
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- ,
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- progname);
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-}
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-
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-
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-/*
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-** Prints an error message, adding the program name in front of it
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-** (if present)
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-*/
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-static void l_message (const char *pname, const char *msg) {
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- if (pname) lua_writestringerror("%s: ", pname);
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- lua_writestringerror("%s\n", msg);
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-}
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-
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-
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-/*
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-** Check whether 'status' is not OK and, if so, prints the error
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-** message on the top of the stack. It assumes that the error object
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-** is a string, as it was either generated by Lua or by 'msghandler'.
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-*/
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-static int report (lua_State *L, int status) {
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- if (status != LUA_OK) {
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- const char *msg = lua_tostring(L, -1);
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- l_message(progname, msg);
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- lua_pop(L, 1); /* remove message */
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- }
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- return status;
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-}
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-
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-
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-/*
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-** Message handler used to run all chunks
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-*/
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-static int msghandler (lua_State *L) {
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- const char *msg = lua_tostring(L, 1);
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- if (msg == NULL) { /* is error object not a string? */
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- if (luaL_callmeta(L, 1, "__tostring") && /* does it have a metamethod */
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- lua_type(L, -1) == LUA_TSTRING) /* that produces a string? */
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- return 1; /* that is the message */
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- else
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- msg = lua_pushfstring(L, "(error object is a %s value)",
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- luaL_typename(L, 1));
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- }
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- luaL_traceback(L, L, msg, 1); /* append a standard traceback */
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- return 1; /* return the traceback */
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-}
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-
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-
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-/*
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-** Interface to 'lua_pcall', which sets appropriate message function
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-** and C-signal handler. Used to run all chunks.
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-*/
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-static int docall (lua_State *L, int narg, int nres) {
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- int status;
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- int base = lua_gettop(L) - narg; /* function index */
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- lua_pushcfunction(L, msghandler); /* push message handler */
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- lua_insert(L, base); /* put it under function and args */
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- globalL = L; /* to be available to 'laction' */
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- signal(SIGINT, laction); /* set C-signal handler */
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- status = lua_pcall(L, narg, nres, base);
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- signal(SIGINT, SIG_DFL); /* reset C-signal handler */
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- lua_remove(L, base); /* remove message handler from the stack */
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- return status;
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-}
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-
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-
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-static void print_version (void) {
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- lua_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT));
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- lua_writeline();
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- lua_writestring("Enhance by LuatOS. call os.exit() for quit", strlen("Enhance by LuatOS. call os.exit() for quit"));
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- lua_writeline();
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-}
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-
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-
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-/*
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-** Create the 'arg' table, which stores all arguments from the
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-** command line ('argv'). It should be aligned so that, at index 0,
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-** it has 'argv[script]', which is the script name. The arguments
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-** to the script (everything after 'script') go to positive indices;
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-** other arguments (before the script name) go to negative indices.
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-** If there is no script name, assume interpreter's name as base.
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-*/
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-static void createargtable (lua_State *L, char **argv, int argc, int script) {
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- int i, narg;
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- if (script == argc) script = 0; /* no script name? */
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- narg = argc - (script + 1); /* number of positive indices */
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- lua_createtable(L, narg, script + 1);
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- for (i = 0; i < argc; i++) {
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- lua_pushstring(L, argv[i]);
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- lua_rawseti(L, -2, i - script);
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- }
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- lua_setglobal(L, "arg");
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-}
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-
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-
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-static int dochunk (lua_State *L, int status) {
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- if (status == LUA_OK) status = docall(L, 0, 0);
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- return report(L, status);
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-}
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-
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-
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-static int dofile (lua_State *L, const char *name) {
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- return dochunk(L, luaL_loadfile(L, name));
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-}
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-
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-
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-static int dostring (lua_State *L, const char *s, const char *name) {
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- return dochunk(L, luaL_loadbuffer(L, s, strlen(s), name));
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-}
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-
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-
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-/*
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-** Calls 'require(name)' and stores the result in a global variable
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-** with the given name.
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-*/
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-static int dolibrary (lua_State *L, const char *name) {
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- int status;
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- lua_getglobal(L, "require");
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- lua_pushstring(L, name);
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- status = docall(L, 1, 1); /* call 'require(name)' */
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- if (status == LUA_OK)
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- lua_setglobal(L, name); /* global[name] = require return */
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- return report(L, status);
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-}
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-
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-
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-/*
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-** Returns the string to be used as a prompt by the interpreter.
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-*/
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-static const char *get_prompt (lua_State *L, int firstline) {
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- const char *p;
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- lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2");
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- p = lua_tostring(L, -1);
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- if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2);
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- return p;
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-}
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-
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-/* mark in error messages for incomplete statements */
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-#define EOFMARK "<eof>"
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-#define marklen (sizeof(EOFMARK)/sizeof(char) - 1)
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-
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-
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-/*
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-** Check whether 'status' signals a syntax error and the error
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-** message at the top of the stack ends with the above mark for
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-** incomplete statements.
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-*/
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-static int incomplete (lua_State *L, int status) {
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- if (status == LUA_ERRSYNTAX) {
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- size_t lmsg;
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- const char *msg = lua_tolstring(L, -1, &lmsg);
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- if (lmsg >= marklen && strcmp(msg + lmsg - marklen, EOFMARK) == 0) {
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- lua_pop(L, 1);
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- return 1;
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- }
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- }
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- return 0; /* else... */
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-}
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-
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-
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-/*
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-** Prompt the user, read a line, and push it into the Lua stack.
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-*/
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-static int pushline (lua_State *L, int firstline) {
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- char buffer[LUA_MAXINPUT];
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- char *b = buffer;
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- size_t l;
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- const char *prmt = get_prompt(L, firstline);
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- int readstatus = lua_readline(L, b, prmt);
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- if (readstatus == 0)
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- return 0; /* no input (prompt will be popped by caller) */
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- lua_pop(L, 1); /* remove prompt */
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- l = strlen(b);
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- if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
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- b[--l] = '\0'; /* remove it */
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- if (firstline && b[0] == '=') /* for compatibility with 5.2, ... */
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- lua_pushfstring(L, "return %s", b + 1); /* change '=' to 'return' */
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- else
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- lua_pushlstring(L, b, l);
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- lua_freeline(L, b);
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- return 1;
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-}
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-
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-
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-/*
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-** Try to compile line on the stack as 'return <line>;'; on return, stack
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-** has either compiled chunk or original line (if compilation failed).
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-*/
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-static int addreturn (lua_State *L) {
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- const char *line = lua_tostring(L, -1); /* original line */
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- const char *retline = lua_pushfstring(L, "return %s;", line);
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- int status = luaL_loadbuffer(L, retline, strlen(retline), "=stdin");
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- if (status == LUA_OK) {
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- lua_remove(L, -2); /* remove modified line */
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- if (line[0] != '\0') /* non empty? */
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- lua_saveline(L, line); /* keep history */
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- }
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- else
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- lua_pop(L, 2); /* pop result from 'luaL_loadbuffer' and modified line */
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- return status;
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-}
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-
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-
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-/*
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-** Read multiple lines until a complete Lua statement
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-*/
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-static int multiline (lua_State *L) {
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- for (;;) { /* repeat until gets a complete statement */
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- size_t len;
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- const char *line = lua_tolstring(L, 1, &len); /* get what it has */
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- int status = luaL_loadbuffer(L, line, len, "=stdin"); /* try it */
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- if (!incomplete(L, status) || !pushline(L, 0)) {
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- lua_saveline(L, line); /* keep history */
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- return status; /* cannot or should not try to add continuation line */
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- }
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- lua_pushliteral(L, "\n"); /* add newline... */
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- lua_insert(L, -2); /* ...between the two lines */
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- lua_concat(L, 3); /* join them */
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- }
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-}
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-
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-
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-/*
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-** Read a line and try to load (compile) it first as an expression (by
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-** adding "return " in front of it) and second as a statement. Return
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-** the final status of load/call with the resulting function (if any)
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-** in the top of the stack.
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-*/
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-static int loadline (lua_State *L) {
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- int status;
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- lua_settop(L, 0);
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- if (!pushline(L, 1))
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- return -1; /* no input */
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- if ((status = addreturn(L)) != LUA_OK) /* 'return ...' did not work? */
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- status = multiline(L); /* try as command, maybe with continuation lines */
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- lua_remove(L, 1); /* remove line from the stack */
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- lua_assert(lua_gettop(L) == 1);
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- return status;
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-}
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-
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-
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-/*
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-** Prints (calling the Lua 'print' function) any values on the stack
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-*/
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-static void l_print (lua_State *L) {
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- int n = lua_gettop(L);
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- if (n > 0) { /* any result to be printed? */
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- luaL_checkstack(L, LUA_MINSTACK, "too many results to print");
|
|
|
- lua_getglobal(L, "print");
|
|
|
- lua_insert(L, 1);
|
|
|
- if (lua_pcall(L, n, 0, 0) != LUA_OK)
|
|
|
- l_message(progname, lua_pushfstring(L, "error calling 'print' (%s)",
|
|
|
- lua_tostring(L, -1)));
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*
|
|
|
-** Do the REPL: repeatedly read (load) a line, evaluate (call) it, and
|
|
|
-** print any results.
|
|
|
-*/
|
|
|
-static void doREPL (lua_State *L) {
|
|
|
- int status;
|
|
|
- const char *oldprogname = progname;
|
|
|
- progname = NULL; /* no 'progname' on errors in interactive mode */
|
|
|
- while ((status = loadline(L)) != -1) {
|
|
|
- if (status == LUA_OK)
|
|
|
- status = docall(L, 0, LUA_MULTRET);
|
|
|
- if (status == LUA_OK) l_print(L);
|
|
|
- else report(L, status);
|
|
|
- }
|
|
|
- lua_settop(L, 0); /* clear stack */
|
|
|
- lua_writeline();
|
|
|
- progname = oldprogname;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*
|
|
|
-** Push on the stack the contents of table 'arg' from 1 to #arg
|
|
|
-*/
|
|
|
-static int pushargs (lua_State *L) {
|
|
|
- int i, n;
|
|
|
- if (lua_getglobal(L, "arg") != LUA_TTABLE)
|
|
|
- luaL_error(L, "'arg' is not a table");
|
|
|
- n = (int)luaL_len(L, -1);
|
|
|
- luaL_checkstack(L, n + 3, "too many arguments to script");
|
|
|
- for (i = 1; i <= n; i++)
|
|
|
- lua_rawgeti(L, -i, i);
|
|
|
- lua_remove(L, -i); /* remove table from the stack */
|
|
|
- return n;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int handle_script (lua_State *L, char **argv) {
|
|
|
- int status;
|
|
|
- const char *fname = argv[0];
|
|
|
- if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
|
|
|
- fname = NULL; /* stdin */
|
|
|
- status = luaL_loadfile(L, fname);
|
|
|
- if (status == LUA_OK) {
|
|
|
- int n = pushargs(L); /* push arguments to script */
|
|
|
- status = docall(L, n, LUA_MULTRET);
|
|
|
- }
|
|
|
- return report(L, status);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-
|
|
|
-/* bits of various argument indicators in 'args' */
|
|
|
-#define has_error 1 /* bad option */
|
|
|
-#define has_i 2 /* -i */
|
|
|
-#define has_v 4 /* -v */
|
|
|
-#define has_e 8 /* -e */
|
|
|
-#define has_E 16 /* -E */
|
|
|
-
|
|
|
-/*
|
|
|
-** Traverses all arguments from 'argv', returning a mask with those
|
|
|
-** needed before running any Lua code (or an error code if it finds
|
|
|
-** any invalid argument). 'first' returns the first not-handled argument
|
|
|
-** (either the script name or a bad argument in case of error).
|
|
|
-*/
|
|
|
-static int collectargs (char **argv, int *first) {
|
|
|
- int args = 0;
|
|
|
- int i;
|
|
|
- for (i = 1; argv[i] != NULL; i++) {
|
|
|
- *first = i;
|
|
|
- if (argv[i][0] != '-') /* not an option? */
|
|
|
- return args; /* stop handling options */
|
|
|
- switch (argv[i][1]) { /* else check option */
|
|
|
- case '-': /* '--' */
|
|
|
- if (argv[i][2] != '\0') /* extra characters after '--'? */
|
|
|
- return has_error; /* invalid option */
|
|
|
- *first = i + 1;
|
|
|
- return args;
|
|
|
- case '\0': /* '-' */
|
|
|
- return args; /* script "name" is '-' */
|
|
|
- case 'E':
|
|
|
- if (argv[i][2] != '\0') /* extra characters after 1st? */
|
|
|
- return has_error; /* invalid option */
|
|
|
- args |= has_E;
|
|
|
- break;
|
|
|
- case 'i':
|
|
|
- args |= has_i; /* (-i implies -v) *//* FALLTHROUGH */
|
|
|
- case 'v':
|
|
|
- if (argv[i][2] != '\0') /* extra characters after 1st? */
|
|
|
- return has_error; /* invalid option */
|
|
|
- args |= has_v;
|
|
|
- break;
|
|
|
- case 'e':
|
|
|
- args |= has_e; /* FALLTHROUGH */
|
|
|
- case 'l': /* both options need an argument */
|
|
|
- if (argv[i][2] == '\0') { /* no concatenated argument? */
|
|
|
- i++; /* try next 'argv' */
|
|
|
- if (argv[i] == NULL || argv[i][0] == '-')
|
|
|
- return has_error; /* no next argument or it is another option */
|
|
|
- }
|
|
|
- break;
|
|
|
- default: /* invalid option */
|
|
|
- return has_error;
|
|
|
- }
|
|
|
- }
|
|
|
- *first = i; /* no script name */
|
|
|
- return args;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*
|
|
|
-** Processes options 'e' and 'l', which involve running Lua code.
|
|
|
-** Returns 0 if some code raises an error.
|
|
|
-*/
|
|
|
-static int runargs (lua_State *L, char **argv, int n) {
|
|
|
- int i;
|
|
|
- for (i = 1; i < n; i++) {
|
|
|
- int option = argv[i][1];
|
|
|
- lua_assert(argv[i][0] == '-'); /* already checked */
|
|
|
- if (option == 'e' || option == 'l') {
|
|
|
- int status;
|
|
|
- const char *extra = argv[i] + 2; /* both options need an argument */
|
|
|
- if (*extra == '\0') extra = argv[++i];
|
|
|
- lua_assert(extra != NULL);
|
|
|
- status = (option == 'e')
|
|
|
- ? dostring(L, extra, "=(command line)")
|
|
|
- : dolibrary(L, extra);
|
|
|
- if (status != LUA_OK) return 0;
|
|
|
- }
|
|
|
- }
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-
|
|
|
-static int handle_luainit (lua_State *L) {
|
|
|
- const char *name = "=" LUA_INITVARVERSION;
|
|
|
- const char *init = getenv(name + 1);
|
|
|
- if (init == NULL) {
|
|
|
- name = "=" LUA_INIT_VAR;
|
|
|
- init = getenv(name + 1); /* try alternative name */
|
|
|
- }
|
|
|
- if (init == NULL) return LUA_OK;
|
|
|
- else if (init[0] == '@')
|
|
|
- return dofile(L, init+1);
|
|
|
- else
|
|
|
- return dostring(L, init, name);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*
|
|
|
-** Main body of stand-alone interpreter (to be called in protected mode).
|
|
|
-** Reads the options and handles them all.
|
|
|
-*/
|
|
|
-static int pmain (lua_State *L) {
|
|
|
- int argc = (int)lua_tointeger(L, 1);
|
|
|
- char **argv = (char **)lua_touserdata(L, 2);
|
|
|
- int script;
|
|
|
- int args = collectargs(argv, &script);
|
|
|
- luaL_checkversion(L); /* check that interpreter has correct version */
|
|
|
- if (argv[0] && argv[0][0]) progname = argv[0];
|
|
|
- if (args == has_error) { /* bad arg? */
|
|
|
- print_usage(argv[script]); /* 'script' has index of bad arg. */
|
|
|
- return 0;
|
|
|
- }
|
|
|
- if (args & has_v) /* option '-v'? */
|
|
|
- print_version();
|
|
|
- if (args & has_E) { /* option '-E'? */
|
|
|
- lua_pushboolean(L, 1); /* signal for libraries to ignore env. vars. */
|
|
|
- lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
|
|
|
- }
|
|
|
- luat_openlibs(L); /* open standard libraries */
|
|
|
- createargtable(L, argv, argc, script); /* create table 'arg' */
|
|
|
- if (!(args & has_E)) { /* no option '-E'? */
|
|
|
- if (handle_luainit(L) != LUA_OK) /* run LUA_INIT */
|
|
|
- return 0; /* error running LUA_INIT */
|
|
|
- }
|
|
|
- if (!runargs(L, argv, script)) /* execute arguments -e and -l */
|
|
|
- return 0; /* something failed */
|
|
|
- if (script < argc && /* execute main script (if there is one) */
|
|
|
- handle_script(L, argv + script) != LUA_OK)
|
|
|
- return 0;
|
|
|
- if (args & has_i) /* -i option? */
|
|
|
- doREPL(L); /* do read-eval-print loop */
|
|
|
- else if (script == argc && !(args & (has_e | has_v))) { /* no arguments? */
|
|
|
- if (lua_stdin_is_tty()) { /* running in interactive mode? */
|
|
|
- print_version();
|
|
|
- doREPL(L); /* do read-eval-print loop */
|
|
|
- }
|
|
|
- else dofile(L, NULL); /* executes stdin as a file */
|
|
|
- }
|
|
|
- lua_pushboolean(L, 1); /* signal no errors */
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-void* luat_heap_alloc(void *ud, void *ptr, size_t osize, size_t nsize);
|
|
|
-
|
|
|
-int lua_main (int argc, char **argv) {
|
|
|
- int status, result;
|
|
|
- lua_State *L = lua_newstate(luat_heap_alloc, NULL);; /* create state */
|
|
|
- if (L == NULL) {
|
|
|
- l_message(argv[0], "cannot create state: not enough memory");
|
|
|
- return EXIT_FAILURE;
|
|
|
- }
|
|
|
- lua_pushcfunction(L, &pmain); /* to call 'pmain' in protected mode */
|
|
|
- lua_pushinteger(L, argc); /* 1st argument */
|
|
|
- lua_pushlightuserdata(L, argv); /* 2nd argument */
|
|
|
- status = lua_pcall(L, 2, 1, 0); /* do the call */
|
|
|
- result = lua_toboolean(L, -1); /* get result */
|
|
|
- report(L, status);
|
|
|
- lua_close(L);
|
|
|
- return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE;
|
|
|
-}
|
Wendal Chen