653 lines
17 KiB
C
653 lines
17 KiB
C
/*
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** $Id: lua.c,v 1.160.1.2 2007/12/28 15:32:23 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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// #include "c_signal.h"
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#include "c_stdio.h"
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#include "c_stdlib.h"
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#include "c_string.h"
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#include "user_interface.h"
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#include "user_version.h"
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#include "driver/readline.h"
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#include "driver/uart.h"
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#define lua_c
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#include "lua.h"
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#include "lauxlib.h"
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#include "lualib.h"
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#include "legc.h"
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#include "os_type.h"
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lua_State *globalL = NULL;
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lua_Load gLoad;
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static const char *progname = LUA_PROGNAME;
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#if 0
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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);
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luaL_error(L, "interrupted!");
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}
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static void laction (int i) {
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// signal(i, SIG_DFL);
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/* if another SIGINT happens before lstop,
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terminate process (default action) */
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lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
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}
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static void print_usage (void) {
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#if defined(LUA_USE_STDIO)
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c_fprintf(c_stderr,
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#else
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luai_writestringerror(
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#endif
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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 " LUA_QL("stat") "\n"
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" -l name require library " LUA_QL("name") "\n"
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" -m limit set memory limit. (units are in Kbytes)\n"
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" -i enter interactive mode after executing " LUA_QL("script") "\n"
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" -v show version information\n"
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" -- stop handling options\n"
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" - execute stdin and stop handling options\n"
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,
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progname);
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#if defined(LUA_USE_STDIO)
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c_fflush(c_stderr);
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#endif
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}
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#endif
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static void l_message (const char *pname, const char *msg) {
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#if defined(LUA_USE_STDIO)
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if (pname) c_fprintf(c_stderr, "%s: ", pname);
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c_fprintf(c_stderr, "%s\n", msg);
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c_fflush(c_stderr);
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#else
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if (pname) luai_writestringerror("%s: ", pname);
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luai_writestringerror("%s\n", msg);
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#endif
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}
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static int report (lua_State *L, int status) {
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if (status && !lua_isnil(L, -1)) {
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const char *msg = lua_tostring(L, -1);
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if (msg == NULL) msg = "(error object is not a string)";
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l_message(progname, msg);
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lua_pop(L, 1);
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}
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return status;
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}
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static int traceback (lua_State *L) {
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if (!lua_isstring(L, 1)) /* 'message' not a string? */
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return 1; /* keep it intact */
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lua_getfield(L, LUA_GLOBALSINDEX, "debug");
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if (!lua_istable(L, -1) && !lua_isrotable(L, -1)) {
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lua_pop(L, 1);
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return 1;
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}
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lua_getfield(L, -1, "traceback");
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if (!lua_isfunction(L, -1) && !lua_islightfunction(L, -1)) {
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lua_pop(L, 2);
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return 1;
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}
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lua_pushvalue(L, 1); /* pass error message */
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lua_pushinteger(L, 2); /* skip this function and traceback */
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lua_call(L, 2, 1); /* call debug.traceback */
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return 1;
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}
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static int docall (lua_State *L, int narg, int clear) {
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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, traceback); /* push traceback function */
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lua_insert(L, base); /* put it under chunk and args */
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// signal(SIGINT, laction);
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status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);
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// signal(SIGINT, SIG_DFL);
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lua_remove(L, base); /* remove traceback function */
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/* force a complete garbage collection in case of errors */
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if (status != 0) lua_gc(L, LUA_GCCOLLECT, 0);
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return status;
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}
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static void print_version (lua_State *L) {
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lua_pushliteral (L, "\n" NODE_VERSION " build " BUILD_DATE " powered by " LUA_RELEASE " on SDK ");
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lua_pushstring (L, SDK_VERSION);
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lua_concat (L, 2);
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const char *msg = lua_tostring (L, -1);
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l_message (NULL, msg);
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lua_pop (L, 1);
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}
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static int getargs (lua_State *L, char **argv, int n) {
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int narg;
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int i;
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int argc = 0;
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while (argv[argc]) argc++; /* count total number of arguments */
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narg = argc - (n + 1); /* number of arguments to the script */
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luaL_checkstack(L, narg + 3, "too many arguments to script");
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for (i=n+1; i < argc; i++)
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lua_pushstring(L, argv[i]);
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lua_createtable(L, narg, n + 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 - n);
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}
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return narg;
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}
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#if 0
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static int dofile (lua_State *L, const char *name) {
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int status = luaL_loadfile(L, name) || docall(L, 0, 1);
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return report(L, status);
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}
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#else
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static int dofsfile (lua_State *L, const char *name) {
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int status = luaL_loadfsfile(L, name) || docall(L, 0, 1);
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return report(L, status);
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}
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#endif
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static int dostring (lua_State *L, const char *s, const char *name) {
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int status = luaL_loadbuffer(L, s, c_strlen(s), name) || docall(L, 0, 1);
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return report(L, status);
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}
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static int dolibrary (lua_State *L, const char *name) {
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lua_getglobal(L, "require");
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lua_pushstring(L, name);
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return report(L, docall(L, 1, 1));
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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_getfield(L, LUA_GLOBALSINDEX, 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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lua_pop(L, 1); /* remove global */
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return p;
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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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const char *tp = msg + lmsg - (sizeof(LUA_QL("<eof>")) - 1);
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if (c_strstr(msg, LUA_QL("<eof>")) == tp) {
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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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#if 0
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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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if (lua_readline(L, b, prmt) == 0)
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return 0; /* no input */
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l = c_strlen(b);
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if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
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b[l-1] = '\0'; /* remove it */
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if (firstline && b[0] == '=') /* first line starts with `=' ? */
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lua_pushfstring(L, "return %s", b+1); /* change it to `return' */
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else
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lua_pushstring(L, b);
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lua_freeline(L, b);
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return 1;
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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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for (;;) { /* repeat until gets a complete line */
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status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
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if (!incomplete(L, status)) break; /* cannot try to add lines? */
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if (!pushline(L, 0)) /* no more input? */
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return -1;
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lua_pushliteral(L, "\n"); /* add a new line... */
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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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lua_saveline(L, 1);
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lua_remove(L, 1); /* remove line */
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return status;
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}
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static void dotty (lua_State *L) {
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int status;
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const char *oldprogname = progname;
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progname = NULL;
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while ((status = loadline(L)) != -1) {
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if (status == 0) status = docall(L, 0, 0);
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report(L, status);
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if (status == 0 && lua_gettop(L) > 0) { /* any result to print? */
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lua_getglobal(L, "print");
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lua_insert(L, 1);
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if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)
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l_message(progname, lua_pushfstring(L,
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"error calling " LUA_QL("print") " (%s)",
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lua_tostring(L, -1)));
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}
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}
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lua_settop(L, 0); /* clear stack */
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#if defined(LUA_USE_STDIO)
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c_fputs("\n", c_stdout);
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c_fflush(c_stdout);
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#else
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luai_writeline();
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#endif
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progname = oldprogname;
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}
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static int handle_script (lua_State *L, char **argv, int n) {
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int status;
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const char *fname;
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int narg = getargs(L, argv, n); /* collect arguments */
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lua_setglobal(L, "arg");
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fname = argv[n];
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if (c_strcmp(fname, "-") == 0 && c_strcmp(argv[n-1], "--") != 0)
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fname = NULL; /* stdin */
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status = luaL_loadfile(L, fname);
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lua_insert(L, -(narg+1));
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if (status == 0)
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status = docall(L, narg, 0);
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else
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lua_pop(L, narg);
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return report(L, status);
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}
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#endif
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/* check that argument has no extra characters at the end */
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#define notail(x) {if ((x)[2] != '\0') return -1;}
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static int collectargs (char **argv, int *pi, int *pv, int *pe) {
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int i;
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for (i = 1; argv[i] != NULL; i++) {
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if (argv[i][0] != '-') /* not an option? */
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return i;
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switch (argv[i][1]) { /* option */
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case '-':
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notail(argv[i]);
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return (argv[i+1] != NULL ? i+1 : 0);
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case '\0':
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return i;
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case 'i':
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notail(argv[i]);
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*pi = 1; /* go through */
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case 'v':
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notail(argv[i]);
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*pv = 1;
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break;
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case 'e':
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*pe = 1; /* go through */
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case 'm': /* go through */
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case 'l':
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if (argv[i][2] == '\0') {
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i++;
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if (argv[i] == NULL) return -1;
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}
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break;
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default: return -1; /* invalid option */
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}
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}
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return 0;
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}
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static int runargs (lua_State *L, char **argv, int n) {
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int i;
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for (i = 1; i < n; i++) {
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if (argv[i] == NULL) continue;
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lua_assert(argv[i][0] == '-');
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switch (argv[i][1]) { /* option */
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case 'e': {
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const char *chunk = argv[i] + 2;
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if (*chunk == '\0') chunk = argv[++i];
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lua_assert(chunk != NULL);
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if (dostring(L, chunk, "=(command line)") != 0)
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return 1;
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break;
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}
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case 'm': {
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const char *limit = argv[i] + 2;
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int memlimit=0;
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if (*limit == '\0') limit = argv[++i];
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lua_assert(limit != NULL);
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memlimit = c_atoi(limit);
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lua_gc(L, LUA_GCSETMEMLIMIT, memlimit);
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break;
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}
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case 'l': {
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const char *filename = argv[i] + 2;
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if (*filename == '\0') filename = argv[++i];
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lua_assert(filename != NULL);
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if (dolibrary(L, filename))
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return 1; /* stop if file fails */
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break;
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}
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default: break;
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}
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}
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return 0;
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}
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static int handle_luainit (lua_State *L) {
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const char *init = c_getenv(LUA_INIT);
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if (init == NULL) return 0; /* status OK */
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else if (init[0] == '@')
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#if 0
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return dofile(L, init+1);
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#else
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return dofsfile(L, init+1);
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#endif
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else
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return dostring(L, init, "=" LUA_INIT);
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}
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struct Smain {
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int argc;
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char **argv;
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int status;
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};
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static int pmain (lua_State *L) {
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struct Smain *s = (struct Smain *)lua_touserdata(L, 1);
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char **argv = s->argv;
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int script;
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int has_i = 0, has_v = 0, has_e = 0;
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globalL = L;
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if (argv[0] && argv[0][0]) progname = argv[0];
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lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */
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luaL_openlibs(L); /* open libraries */
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lua_gc(L, LUA_GCRESTART, 0);
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print_version(L);
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s->status = handle_luainit(L);
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#if 0
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if (s->status != 0) return 0;
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#endif
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script = collectargs(argv, &has_i, &has_v, &has_e);
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if (script < 0) { /* invalid args? */
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#if 0
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print_usage();
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#endif
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s->status = 1;
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return 0;
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}
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// if (has_v) print_version();
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s->status = runargs(L, argv, (script > 0) ? script : s->argc);
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if (s->status != 0) return 0;
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#if 0
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if (script)
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s->status = handle_script(L, argv, script);
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if (s->status != 0) return 0;
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if (has_i)
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dotty(L);
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else if (script == 0 && !has_e && !has_v) {
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if (lua_stdin_is_tty()) {
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print_version();
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dotty(L);
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}
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else dofile(L, NULL); /* executes stdin as a file */
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}
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#endif
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return 0;
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}
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static void dojob(lua_Load *load);
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static bool readline(lua_Load *load);
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char line_buffer[LUA_MAXINPUT];
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#ifdef LUA_RPC
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int main (int argc, char **argv) {
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#else
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int lua_main (int argc, char **argv) {
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#endif
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int status;
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struct Smain s;
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lua_State *L = lua_open(); /* create state */
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if (L == NULL) {
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l_message(argv[0], "cannot create state: not enough memory");
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return EXIT_FAILURE;
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}
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s.argc = argc;
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s.argv = argv;
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status = lua_cpcall(L, &pmain, &s);
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report(L, status);
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gLoad.L = L;
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gLoad.firstline = 1;
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gLoad.done = 0;
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gLoad.line = line_buffer;
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gLoad.len = LUA_MAXINPUT;
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gLoad.line_position = 0;
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gLoad.prmt = get_prompt(L, 1);
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dojob(&gLoad);
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NODE_DBG("Heap size::%d.\n",system_get_free_heap_size());
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legc_set_mode( L, EGC_ALWAYS, 4096 );
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// legc_set_mode( L, EGC_ON_MEM_LIMIT, 4096 );
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// lua_close(L);
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return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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void lua_handle_input (bool force)
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{
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while (gLoad.L && (force || readline (&gLoad)))
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{
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dojob (&gLoad);
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force = false;
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}
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}
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void donejob(lua_Load *load){
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lua_close(load->L);
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}
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static void dojob(lua_Load *load){
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size_t l, rs;
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int status;
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char *b = load->line;
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lua_State *L = load->L;
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const char *oldprogname = progname;
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progname = NULL;
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do{
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if(load->done == 1){
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l = c_strlen(b);
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if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
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b[l-1] = '\0'; /* remove it */
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if (load->firstline && b[0] == '=') /* first line starts with `=' ? */
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lua_pushfstring(L, "return %s", b+1); /* change it to `return' */
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else
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lua_pushstring(L, b);
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if(load->firstline != 1){
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lua_pushliteral(L, "\n"); /* add a new line... */
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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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status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
|
|
if (!incomplete(L, status)) { /* cannot try to add lines? */
|
|
lua_remove(L, 1); /* remove line */
|
|
if (status == 0) {
|
|
status = docall(L, 0, 0);
|
|
}
|
|
report(L, status);
|
|
if (status == 0 && lua_gettop(L) > 0) { /* any result to print? */
|
|
lua_getglobal(L, "print");
|
|
lua_insert(L, 1);
|
|
if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)
|
|
l_message(progname, lua_pushfstring(L,
|
|
"error calling " LUA_QL("print") " (%s)",
|
|
lua_tostring(L, -1)));
|
|
}
|
|
load->firstline = 1;
|
|
load->prmt = get_prompt(L, 1);
|
|
lua_settop(L, 0);
|
|
/* force a complete garbage collection in case of errors */
|
|
if (status != 0) lua_gc(L, LUA_GCCOLLECT, 0);
|
|
} else {
|
|
load->firstline = 0;
|
|
load->prmt = get_prompt(L, 0);
|
|
}
|
|
}
|
|
}while(0);
|
|
|
|
progname = oldprogname;
|
|
|
|
load->done = 0;
|
|
load->line_position = 0;
|
|
c_memset(load->line, 0, load->len);
|
|
c_puts(load->prmt);
|
|
}
|
|
|
|
#ifndef uart_putc
|
|
#define uart_putc uart0_putc
|
|
#endif
|
|
extern bool uart_on_data_cb(const char *buf, size_t len);
|
|
extern bool uart0_echo;
|
|
extern bool run_input;
|
|
extern uint16_t need_len;
|
|
extern int16_t end_char;
|
|
static char last_nl_char = '\0';
|
|
static bool readline(lua_Load *load){
|
|
// NODE_DBG("readline() is called.\n");
|
|
bool need_dojob = false;
|
|
char ch;
|
|
while (uart_getc(&ch))
|
|
{
|
|
if(run_input)
|
|
{
|
|
char tmp_last_nl_char = last_nl_char;
|
|
// reset marker, will be finally set below when newline is processed
|
|
last_nl_char = '\0';
|
|
|
|
/* handle CR & LF characters
|
|
filters second char of LF&CR (\n\r) or CR&LF (\r\n) sequences */
|
|
if ((ch == '\r' && tmp_last_nl_char == '\n') || // \n\r sequence -> skip \r
|
|
(ch == '\n' && tmp_last_nl_char == '\r')) // \r\n sequence -> skip \n
|
|
{
|
|
continue;
|
|
}
|
|
|
|
/* backspace key */
|
|
else if (ch == 0x7f || ch == 0x08)
|
|
{
|
|
if (load->line_position > 0)
|
|
{
|
|
if(uart0_echo) uart_putc(0x08);
|
|
if(uart0_echo) uart_putc(' ');
|
|
if(uart0_echo) uart_putc(0x08);
|
|
load->line_position--;
|
|
}
|
|
load->line[load->line_position] = 0;
|
|
continue;
|
|
}
|
|
/* EOT(ctrl+d) */
|
|
// else if (ch == 0x04)
|
|
// {
|
|
// if (load->line_position == 0)
|
|
// // No input which makes lua interpreter close
|
|
// donejob(load);
|
|
// else
|
|
// continue;
|
|
// }
|
|
|
|
/* end of line */
|
|
if (ch == '\r' || ch == '\n')
|
|
{
|
|
last_nl_char = ch;
|
|
|
|
load->line[load->line_position] = 0;
|
|
if(uart0_echo) uart_putc('\n');
|
|
uart_on_data_cb(load->line, load->line_position);
|
|
if (load->line_position == 0)
|
|
{
|
|
/* Get a empty line, then go to get a new line */
|
|
c_puts(load->prmt);
|
|
continue;
|
|
} else {
|
|
load->done = 1;
|
|
need_dojob = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* other control character or not an acsii character */
|
|
// if (ch < 0x20 || ch >= 0x80)
|
|
// {
|
|
// continue;
|
|
// }
|
|
|
|
/* echo */
|
|
if(uart0_echo) uart_putc(ch);
|
|
|
|
/* it's a large line, discard it */
|
|
if ( load->line_position + 1 >= load->len ){
|
|
load->line_position = 0;
|
|
}
|
|
}
|
|
|
|
load->line[load->line_position] = ch;
|
|
load->line_position++;
|
|
|
|
if(!run_input)
|
|
{
|
|
if( ((need_len!=0) && (load->line_position >= need_len)) || \
|
|
(load->line_position >= load->len) || \
|
|
((end_char>=0) && ((unsigned char)ch==(unsigned char)end_char)) )
|
|
{
|
|
uart_on_data_cb(load->line, load->line_position);
|
|
load->line_position = 0;
|
|
}
|
|
}
|
|
|
|
ch = 0;
|
|
}
|
|
|
|
if( (load->line_position > 0) && (!run_input) && (need_len==0) && (end_char<0) )
|
|
{
|
|
uart_on_data_cb(load->line, load->line_position);
|
|
load->line_position = 0;
|
|
}
|
|
|
|
return need_dojob;
|
|
}
|