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-rw-r--r--src/bin/lua/lua.c614
1 files changed, 0 insertions, 614 deletions
diff --git a/src/bin/lua/lua.c b/src/bin/lua/lua.c
deleted file mode 100644
index 8f64451..0000000
--- a/src/bin/lua/lua.c
+++ /dev/null
@@ -1,614 +0,0 @@
-/*
-** $Id: lua.c,v 1.226 2015/08/14 19:11:20 roberto Exp $
-** Lua stand-alone interpreter
-** See Copyright Notice in lua.h
-*/
-
-// {{ Customization for Kogata
-#define LUA_USE_READLINE 1
-// Other customization includes: removing static qualifiers
-// }}
-
-#define lua_c
-
-#include "lprefix.h"
-
-
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-#if !defined(LUA_PROMPT)
-#define LUA_PROMPT "> "
-#define LUA_PROMPT2 ">> "
-#endif
-
-#if !defined(LUA_PROGNAME)
-#define LUA_PROGNAME "lua"
-#endif
-
-#if !defined(LUA_MAXINPUT)
-#define LUA_MAXINPUT 512
-#endif
-
-#if !defined(LUA_INIT_VAR)
-#define LUA_INIT_VAR "LUA_INIT"
-#endif
-
-#define LUA_INITVARVERSION \
- LUA_INIT_VAR "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
-
-
-/*
-** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
-** is, whether we're running lua interactively).
-*/
-#if !defined(lua_stdin_is_tty) /* { */
-
-#if defined(LUA_USE_POSIX) /* { */
-
-#include <unistd.h>
-#define lua_stdin_is_tty() isatty(0)
-
-#elif defined(LUA_USE_WINDOWS) /* }{ */
-
-#include <io.h>
-#define lua_stdin_is_tty() _isatty(_fileno(stdin))
-
-#else /* }{ */
-
-/* ISO C definition */
-#define lua_stdin_is_tty() 1 /* assume stdin is a tty */
-
-#endif /* } */
-
-#endif /* } */
-
-
-/*
-** lua_readline defines how to show a prompt and then read a line from
-** the standard input.
-** lua_saveline defines how to "save" a read line in a "history".
-** lua_freeline defines how to free a line read by lua_readline.
-*/
-#if !defined(lua_readline) /* { */
-
-#if defined(LUA_USE_READLINE) /* { */
-
-#include <readline/readline.h>
-#include <readline/history.h>
-#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
-#define lua_saveline(L,line) ((void)L, add_history(line))
-#define lua_freeline(L,b) ((void)L, free(b))
-
-#else /* }{ */
-
-#define lua_readline(L,b,p) \
- ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
- fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
-#define lua_saveline(L,line) { (void)L; (void)line; }
-#define lua_freeline(L,b) { (void)L; (void)b; }
-
-#endif /* } */
-
-#endif /* } */
-
-
-
-
-lua_State *globalL = NULL;
-
-const char *progname = LUA_PROGNAME;
-
-
-/*
-** Hook set by signal function to stop the interpreter.
-*/
-void lstop (lua_State *L, lua_Debug *ar) {
- (void)ar; /* unused arg. */
- lua_sethook(L, NULL, 0, 0); /* reset hook */
- luaL_error(L, "interrupted!");
-}
-
-
-/*
-** Function to be called at a C signal. Because a C signal cannot
-** just change a Lua state (as there is no proper synchronization),
-** this function only sets a hook that, when called, will stop the
-** interpreter.
-*/
-void laction (int i) {
- signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
- lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
-}
-
-
-void print_usage (const char *badoption) {
- lua_writestringerror("%s: ", progname);
- if (badoption[1] == 'e' || badoption[1] == 'l')
- lua_writestringerror("'%s' needs argument\n", badoption);
- else
- lua_writestringerror("unrecognized option '%s'\n", badoption);
- lua_writestringerror(
- "usage: %s [options] [script [args]]\n"
- "Available options are:\n"
- " -e stat execute string 'stat'\n"
- " -i enter interactive mode after executing 'script'\n"
- " -l name require library 'name'\n"
- " -v show version information\n"
- " -E ignore environment variables\n"
- " -- stop handling options\n"
- " - stop handling options and execute stdin\n"
- ,
- progname);
-}
-
-
-/*
-** Prints an error message, adding the program name in front of it
-** (if present)
-*/
-void l_message (const char *pname, const char *msg) {
- if (pname) lua_writestringerror("%s: ", pname);
- lua_writestringerror("%s\n", msg);
-}
-
-
-/*
-** Check whether 'status' is not OK and, if so, prints the error
-** message on the top of the stack. It assumes that the error object
-** is a string, as it was either generated by Lua or by 'msghandler'.
-*/
-int report (lua_State *L, int status) {
- if (status != LUA_OK) {
- const char *msg = lua_tostring(L, -1);
- l_message(progname, msg);
- lua_pop(L, 1); /* remove message */
- }
- return status;
-}
-
-
-/*
-** Message handler used to run all chunks
-*/
-int msghandler (lua_State *L) {
- const char *msg = lua_tostring(L, 1);
- if (msg == NULL) { /* is error object not a string? */
- if (luaL_callmeta(L, 1, "__tostring") && /* does it have a metamethod */
- lua_type(L, -1) == LUA_TSTRING) /* that produces a string? */
- return 1; /* that is the message */
- else
- msg = lua_pushfstring(L, "(error object is a %s value)",
- luaL_typename(L, 1));
- }
- luaL_traceback(L, L, msg, 1); /* append a standard traceback */
- return 1; /* return the traceback */
-}
-
-
-/*
-** Interface to 'lua_pcall', which sets appropriate message function
-** and C-signal handler. Used to run all chunks.
-*/
-int docall (lua_State *L, int narg, int nres) {
- int status;
- int base = lua_gettop(L) - narg; /* function index */
- lua_pushcfunction(L, msghandler); /* push message handler */
- lua_insert(L, base); /* put it under function and args */
- globalL = L; /* to be available to 'laction' */
- signal(SIGINT, laction); /* set C-signal handler */
- status = lua_pcall(L, narg, nres, base);
- signal(SIGINT, SIG_DFL); /* reset C-signal handler */
- lua_remove(L, base); /* remove message handler from the stack */
- return status;
-}
-
-
-void print_version (void) {
- lua_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT));
- lua_writeline();
-}
-
-
-/*
-** Create the 'arg' table, which stores all arguments from the
-** command line ('argv'). It should be aligned so that, at index 0,
-** it has 'argv[script]', which is the script name. The arguments
-** to the script (everything after 'script') go to positive indices;
-** other arguments (before the script name) go to negative indices.
-** If there is no script name, assume interpreter's name as base.
-*/
-void createargtable (lua_State *L, char **argv, int argc, int script) {
- int i, narg;
- if (script == argc) script = 0; /* no script name? */
- narg = argc - (script + 1); /* number of positive indices */
- lua_createtable(L, narg, script + 1);
- for (i = 0; i < argc; i++) {
- lua_pushstring(L, argv[i]);
- lua_rawseti(L, -2, i - script);
- }
- lua_setglobal(L, "arg");
-}
-
-
-int dochunk (lua_State *L, int status) {
- if (status == LUA_OK) status = docall(L, 0, 0);
- return report(L, status);
-}
-
-
-int dofile (lua_State *L, const char *name) {
- return dochunk(L, luaL_loadfile(L, name));
-}
-
-
-int dostring (lua_State *L, const char *s, const char *name) {
- return dochunk(L, luaL_loadbuffer(L, s, strlen(s), name));
-}
-
-
-/*
-** Calls 'require(name)' and stores the result in a global variable
-** with the given name.
-*/
-int dolibrary (lua_State *L, const char *name) {
- int status;
- lua_getglobal(L, "require");
- lua_pushstring(L, name);
- status = docall(L, 1, 1); /* call 'require(name)' */
- if (status == LUA_OK)
- lua_setglobal(L, name); /* global[name] = require return */
- return report(L, status);
-}
-
-
-/*
-** Returns the string to be used as a prompt by the interpreter.
-*/
-const char *get_prompt (lua_State *L, int firstline) {
- const char *p;
- lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2");
- p = lua_tostring(L, -1);
- if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2);
- return p;
-}
-
-/* mark in error messages for incomplete statements */
-#define EOFMARK "<eof>"
-#define marklen (sizeof(EOFMARK)/sizeof(char) - 1)
-
-
-/*
-** Check whether 'status' signals a syntax error and the error
-** message at the top of the stack ends with the above mark for
-** incomplete statements.
-*/
-int incomplete (lua_State *L, int status) {
- if (status == LUA_ERRSYNTAX) {
- size_t lmsg;
- const char *msg = lua_tolstring(L, -1, &lmsg);
- if (lmsg >= marklen && strcmp(msg + lmsg - marklen, EOFMARK) == 0) {
- lua_pop(L, 1);
- return 1;
- }
- }
- return 0; /* else... */
-}
-
-
-/*
-** Prompt the user, read a line, and push it into the Lua stack.
-*/
-int pushline (lua_State *L, int firstline) {
- char buffer[LUA_MAXINPUT];
- char *b = buffer;
- size_t l;
- const char *prmt = get_prompt(L, firstline);
- int readstatus = lua_readline(L, b, prmt);
- if (readstatus == 0)
- return 0; /* no input (prompt will be popped by caller) */
- lua_pop(L, 1); /* remove prompt */
- l = strlen(b);
- if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
- b[--l] = '\0'; /* remove it */
- if (firstline && b[0] == '=') /* for compatibility with 5.2, ... */
- lua_pushfstring(L, "return %s", b + 1); /* change '=' to 'return' */
- else
- lua_pushlstring(L, b, l);
- lua_freeline(L, b);
- return 1;
-}
-
-
-/*
-** Try to compile line on the stack as 'return <line>;'; on return, stack
-** has either compiled chunk or original line (if compilation failed).
-*/
-int addreturn (lua_State *L) {
- const char *line = lua_tostring(L, -1); /* original line */
- const char *retline = lua_pushfstring(L, "return %s;", line);
- int status = luaL_loadbuffer(L, retline, strlen(retline), "=stdin");
- if (status == LUA_OK) {
- lua_remove(L, -2); /* remove modified line */
- if (line[0] != '\0') /* non empty? */
- lua_saveline(L, line); /* keep history */
- }
- else
- lua_pop(L, 2); /* pop result from 'luaL_loadbuffer' and modified line */
- return status;
-}
-
-
-/*
-** Read multiple lines until a complete Lua statement
-*/
-int multiline (lua_State *L) {
- for (;;) { /* repeat until gets a complete statement */
- size_t len;
- const char *line = lua_tolstring(L, 1, &len); /* get what it has */
- int status = luaL_loadbuffer(L, line, len, "=stdin"); /* try it */
- if (!incomplete(L, status) || !pushline(L, 0)) {
- lua_saveline(L, line); /* keep history */
- return status; /* cannot or should not try to add continuation line */
- }
- lua_pushliteral(L, "\n"); /* add newline... */
- lua_insert(L, -2); /* ...between the two lines */
- lua_concat(L, 3); /* join them */
- }
-}
-
-
-/*
-** Read a line and try to load (compile) it first as an expression (by
-** adding "return " in front of it) and second as a statement. Return
-** the final status of load/call with the resulting function (if any)
-** in the top of the stack.
-*/
-int loadline (lua_State *L) {
- int status;
- lua_settop(L, 0);
- if (!pushline(L, 1))
- return -1; /* no input */
- if ((status = addreturn(L)) != LUA_OK) /* 'return ...' did not work? */
- status = multiline(L); /* try as command, maybe with continuation lines */
- lua_remove(L, 1); /* remove line from the stack */
- lua_assert(lua_gettop(L) == 1);
- return status;
-}
-
-
-/*
-** Prints (calling the Lua 'print' function) any values on the stack
-*/
-void l_print (lua_State *L) {
- int n = lua_gettop(L);
- if (n > 0) { /* any result to be printed? */
- 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.
-*/
-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
-*/
-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;
-}
-
-
-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).
-*/
-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.
-*/
-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;
-}
-
-
-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.
-*/
-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");
- }
- luaL_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;
-}
-
-
-int main (int argc, char **argv) {
- int status, result;
- lua_State *L = luaL_newstate(); /* 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;
-}
-
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