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- /*
- ** $Id: lua.c,v 1.160.1.2 2007/12/28 15:32:23 roberto Exp $
- ** Lua stand-alone interpreter
- ** See Copyright Notice in lua.h
- */
- // #include "c_signal.h"
- #include "c_stdio.h"
- #include "c_stdlib.h"
- #include "c_string.h"
- #include "user_interface.h"
- #include "user_version.h"
- #include "driver/readline.h"
- #include "driver/uart.h"
- #define lua_c
- #include "lua.h"
- #include "lauxlib.h"
- #include "lualib.h"
- #include "legc.h"
- #include "os_type.h"
- lua_State *globalL = NULL;
- lua_Load gLoad;
- static const char *progname = LUA_PROGNAME;
- #if 0
- static void lstop (lua_State *L, lua_Debug *ar) {
- (void)ar; /* unused arg. */
- lua_sethook(L, NULL, 0, 0);
- luaL_error(L, "interrupted!");
- }
- static void laction (int i) {
- // signal(i, SIG_DFL);
- /* if another SIGINT happens before lstop,
- terminate process (default action) */
- lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
- }
- static void print_usage (void) {
- #if defined(LUA_USE_STDIO)
- c_fprintf(c_stderr,
- #else
- luai_writestringerror(
- #endif
- "usage: %s [options] [script [args]].\n"
- "Available options are:\n"
- " -e stat execute string " LUA_QL("stat") "\n"
- " -l name require library " LUA_QL("name") "\n"
- " -m limit set memory limit. (units are in Kbytes)\n"
- " -i enter interactive mode after executing " LUA_QL("script") "\n"
- " -v show version information\n"
- " -- stop handling options\n"
- " - execute stdin and stop handling options\n"
- ,
- progname);
- #if defined(LUA_USE_STDIO)
- c_fflush(c_stderr);
- #endif
- }
- #endif
- static void l_message (const char *pname, const char *msg) {
- #if defined(LUA_USE_STDIO)
- if (pname) c_fprintf(c_stderr, "%s: ", pname);
- c_fprintf(c_stderr, "%s\n", msg);
- c_fflush(c_stderr);
- #else
- if (pname) luai_writestringerror("%s: ", pname);
- luai_writestringerror("%s\n", msg);
- #endif
- }
- static int report (lua_State *L, int status) {
- if (status && !lua_isnil(L, -1)) {
- const char *msg = lua_tostring(L, -1);
- if (msg == NULL) msg = "(error object is not a string)";
- l_message(progname, msg);
- lua_pop(L, 1);
- }
- return status;
- }
- static int traceback (lua_State *L) {
- if (!lua_isstring(L, 1)) /* 'message' not a string? */
- return 1; /* keep it intact */
- lua_getfield(L, LUA_GLOBALSINDEX, "debug");
- if (!lua_istable(L, -1) && !lua_isrotable(L, -1)) {
- lua_pop(L, 1);
- return 1;
- }
- lua_getfield(L, -1, "traceback");
- if (!lua_isfunction(L, -1) && !lua_islightfunction(L, -1)) {
- lua_pop(L, 2);
- return 1;
- }
- lua_pushvalue(L, 1); /* pass error message */
- lua_pushinteger(L, 2); /* skip this function and traceback */
- lua_call(L, 2, 1); /* call debug.traceback */
- return 1;
- }
- static int docall (lua_State *L, int narg, int clear) {
- int status;
- int base = lua_gettop(L) - narg; /* function index */
- lua_pushcfunction(L, traceback); /* push traceback function */
- lua_insert(L, base); /* put it under chunk and args */
- // signal(SIGINT, laction);
- status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);
- // signal(SIGINT, SIG_DFL);
- lua_remove(L, base); /* remove traceback function */
- /* force a complete garbage collection in case of errors */
- if (status != 0) lua_gc(L, LUA_GCCOLLECT, 0);
- return status;
- }
- static void print_version (lua_State *L) {
- lua_pushliteral (L, "\n" NODE_VERSION " build " BUILD_DATE " powered by " LUA_RELEASE " on SDK ");
- lua_pushstring (L, SDK_VERSION);
- lua_concat (L, 2);
- const char *msg = lua_tostring (L, -1);
- l_message (NULL, msg);
- lua_pop (L, 1);
- }
- static int getargs (lua_State *L, char **argv, int n) {
- int narg;
- int i;
- int argc = 0;
- while (argv[argc]) argc++; /* count total number of arguments */
- narg = argc - (n + 1); /* number of arguments to the script */
- luaL_checkstack(L, narg + 3, "too many arguments to script");
- for (i=n+1; i < argc; i++)
- lua_pushstring(L, argv[i]);
- lua_createtable(L, narg, n + 1);
- for (i=0; i < argc; i++) {
- lua_pushstring(L, argv[i]);
- lua_rawseti(L, -2, i - n);
- }
- return narg;
- }
- #if 0
- static int dofile (lua_State *L, const char *name) {
- int status = luaL_loadfile(L, name) || docall(L, 0, 1);
- return report(L, status);
- }
- #else
- static int dofsfile (lua_State *L, const char *name) {
- int status = luaL_loadfsfile(L, name) || docall(L, 0, 1);
- return report(L, status);
- }
- #endif
- static int dostring (lua_State *L, const char *s, const char *name) {
- int status = luaL_loadbuffer(L, s, c_strlen(s), name) || docall(L, 0, 1);
- return report(L, status);
- }
- static int dolibrary (lua_State *L, const char *name) {
- lua_getglobal(L, "require");
- lua_pushstring(L, name);
- return report(L, docall(L, 1, 1));
- }
- static const char *get_prompt (lua_State *L, int firstline) {
- const char *p;
- lua_getfield(L, LUA_GLOBALSINDEX, firstline ? "_PROMPT" : "_PROMPT2");
- p = lua_tostring(L, -1);
- if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2);
- lua_pop(L, 1); /* remove global */
- return p;
- }
- static int incomplete (lua_State *L, int status) {
- if (status == LUA_ERRSYNTAX) {
- size_t lmsg;
- const char *msg = lua_tolstring(L, -1, &lmsg);
- const char *tp = msg + lmsg - (sizeof(LUA_QL("<eof>")) - 1);
- if (c_strstr(msg, LUA_QL("<eof>")) == tp) {
- lua_pop(L, 1);
- return 1;
- }
- }
- return 0; /* else... */
- }
- #if 0
- static int pushline (lua_State *L, int firstline) {
- char buffer[LUA_MAXINPUT];
- char *b = buffer;
- size_t l;
- const char *prmt = get_prompt(L, firstline);
- if (lua_readline(L, b, prmt) == 0)
- return 0; /* no input */
- l = c_strlen(b);
- if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
- b[l-1] = '\0'; /* remove it */
- if (firstline && b[0] == '=') /* first line starts with `=' ? */
- lua_pushfstring(L, "return %s", b+1); /* change it to `return' */
- else
- lua_pushstring(L, b);
- lua_freeline(L, b);
- return 1;
- }
- static int loadline (lua_State *L) {
- int status;
- lua_settop(L, 0);
- if (!pushline(L, 1))
- return -1; /* no input */
- for (;;) { /* repeat until gets a complete line */
- status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
- if (!incomplete(L, status)) break; /* cannot try to add lines? */
- if (!pushline(L, 0)) /* no more input? */
- return -1;
- lua_pushliteral(L, "\n"); /* add a new line... */
- lua_insert(L, -2); /* ...between the two lines */
- lua_concat(L, 3); /* join them */
- }
- lua_saveline(L, 1);
- lua_remove(L, 1); /* remove line */
- return status;
- }
- static void dotty (lua_State *L) {
- int status;
- const char *oldprogname = progname;
- progname = NULL;
- while ((status = loadline(L)) != -1) {
- 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)));
- }
- }
- lua_settop(L, 0); /* clear stack */
-
- #if defined(LUA_USE_STDIO)
- c_fputs("\n", c_stdout);
- c_fflush(c_stdout);
- #else
- luai_writeline();
- #endif
- progname = oldprogname;
- }
- static int handle_script (lua_State *L, char **argv, int n) {
- int status;
- const char *fname;
- int narg = getargs(L, argv, n); /* collect arguments */
- lua_setglobal(L, "arg");
- fname = argv[n];
- if (c_strcmp(fname, "-") == 0 && c_strcmp(argv[n-1], "--") != 0)
- fname = NULL; /* stdin */
- status = luaL_loadfile(L, fname);
- lua_insert(L, -(narg+1));
- if (status == 0)
- status = docall(L, narg, 0);
- else
- lua_pop(L, narg);
- return report(L, status);
- }
- #endif
- /* check that argument has no extra characters at the end */
- #define notail(x) {if ((x)[2] != '\0') return -1;}
- static int collectargs (char **argv, int *pi, int *pv, int *pe) {
- int i;
- for (i = 1; argv[i] != NULL; i++) {
- if (argv[i][0] != '-') /* not an option? */
- return i;
- switch (argv[i][1]) { /* option */
- case '-':
- notail(argv[i]);
- return (argv[i+1] != NULL ? i+1 : 0);
- case '\0':
- return i;
- case 'i':
- notail(argv[i]);
- *pi = 1; /* go through */
- case 'v':
- notail(argv[i]);
- *pv = 1;
- break;
- case 'e':
- *pe = 1; /* go through */
- case 'm': /* go through */
- case 'l':
- if (argv[i][2] == '\0') {
- i++;
- if (argv[i] == NULL) return -1;
- }
- break;
- default: return -1; /* invalid option */
- }
- }
- return 0;
- }
- static int runargs (lua_State *L, char **argv, int n) {
- int i;
- for (i = 1; i < n; i++) {
- if (argv[i] == NULL) continue;
- lua_assert(argv[i][0] == '-');
- switch (argv[i][1]) { /* option */
- case 'e': {
- const char *chunk = argv[i] + 2;
- if (*chunk == '\0') chunk = argv[++i];
- lua_assert(chunk != NULL);
- if (dostring(L, chunk, "=(command line)") != 0)
- return 1;
- break;
- }
- case 'm': {
- const char *limit = argv[i] + 2;
- int memlimit=0;
- if (*limit == '\0') limit = argv[++i];
- lua_assert(limit != NULL);
- memlimit = c_atoi(limit);
- lua_gc(L, LUA_GCSETMEMLIMIT, memlimit);
- break;
- }
- case 'l': {
- const char *filename = argv[i] + 2;
- if (*filename == '\0') filename = argv[++i];
- lua_assert(filename != NULL);
- if (dolibrary(L, filename))
- return 1; /* stop if file fails */
- break;
- }
- default: break;
- }
- }
- return 0;
- }
- static int handle_luainit (lua_State *L) {
- const char *init = c_getenv(LUA_INIT);
- if (init == NULL) return 0; /* status OK */
- else if (init[0] == '@')
- #if 0
- return dofile(L, init+1);
- #else
- return dofsfile(L, init+1);
- #endif
- else
- return dostring(L, init, "=" LUA_INIT);
- }
- struct Smain {
- int argc;
- char **argv;
- int status;
- };
- static int pmain (lua_State *L) {
- struct Smain *s = (struct Smain *)lua_touserdata(L, 1);
- char **argv = s->argv;
- int script;
- int has_i = 0, has_v = 0, has_e = 0;
- globalL = L;
- if (argv[0] && argv[0][0]) progname = argv[0];
- lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */
- luaL_openlibs(L); /* open libraries */
- lua_gc(L, LUA_GCRESTART, 0);
- print_version(L);
- s->status = handle_luainit(L);
- #if 0
- if (s->status != 0) return 0;
- #endif
- script = collectargs(argv, &has_i, &has_v, &has_e);
- if (script < 0) { /* invalid args? */
- #if 0
- print_usage();
- #endif
- s->status = 1;
- return 0;
- }
- // if (has_v) print_version();
- s->status = runargs(L, argv, (script > 0) ? script : s->argc);
- if (s->status != 0) return 0;
- #if 0
- if (script)
- s->status = handle_script(L, argv, script);
- if (s->status != 0) return 0;
- if (has_i)
- dotty(L);
- else if (script == 0 && !has_e && !has_v) {
- if (lua_stdin_is_tty()) {
- print_version();
- dotty(L);
- }
- else dofile(L, NULL); /* executes stdin as a file */
- }
- #endif
- return 0;
- }
- static void dojob(lua_Load *load);
- static bool readline(lua_Load *load);
- char line_buffer[LUA_MAXINPUT];
- #ifdef LUA_RPC
- int main (int argc, char **argv) {
- #else
- int lua_main (int argc, char **argv) {
- #endif
- int status;
- struct Smain s;
- lua_State *L = lua_open(); /* create state */
- if (L == NULL) {
- l_message(argv[0], "cannot create state: not enough memory");
- return EXIT_FAILURE;
- }
- s.argc = argc;
- s.argv = argv;
- status = lua_cpcall(L, &pmain, &s);
- report(L, status);
- gLoad.L = L;
- gLoad.firstline = 1;
- gLoad.done = 0;
- gLoad.line = line_buffer;
- gLoad.len = LUA_MAXINPUT;
- gLoad.line_position = 0;
- gLoad.prmt = get_prompt(L, 1);
- dojob(&gLoad);
- NODE_DBG("Heap size::%d.\n",system_get_free_heap_size());
- legc_set_mode( L, EGC_ALWAYS, 4096 );
- // legc_set_mode( L, EGC_ON_MEM_LIMIT, 4096 );
- // lua_close(L);
- return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS;
- }
- void lua_handle_input (bool force)
- {
- while (gLoad.L && (force || readline (&gLoad)))
- {
- dojob (&gLoad);
- force = false;
- }
- }
- void donejob(lua_Load *load){
- lua_close(load->L);
- }
- static void dojob(lua_Load *load){
- size_t l, rs;
- int status;
- char *b = load->line;
- lua_State *L = load->L;
- const char *oldprogname = progname;
- progname = NULL;
-
- do{
- if(load->done == 1){
- l = c_strlen(b);
- if (l > 0 && b[l-1] == '\n') /* line ends with newline? */
- b[l-1] = '\0'; /* remove it */
- if (load->firstline && b[0] == '=') /* first line starts with `=' ? */
- lua_pushfstring(L, "return %s", b+1); /* change it to `return' */
- else
- lua_pushstring(L, b);
- if(load->firstline != 1){
- lua_pushliteral(L, "\n"); /* add a new line... */
- lua_insert(L, -2); /* ...between the two lines */
- lua_concat(L, 3); /* join them */
- }
- 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;
- }
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