MirrorSave
/
nodemcu-firmware
mirror of https://github.com/nodemcu/nodemcu-firmware.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
nodemcu-firmware/components/lua/lua.c

542 lines
14 KiB
C
Raw Blame History

/*
** $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 <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "user_version.h"
#include "driver/console.h"
#include "esp_system.h"
#include "platform.h"
#define lua_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#include "legc.h"
#include "lflash.h"
lua_State *globalL = NULL;
lua_Load gLoad;
static const char *progname = LUA_PROGNAME;
static void l_message (const char *pname, const char *msg) {
#if defined(LUA_USE_STDIO)
if (pname) fprintf(stderr, "%s: ", pname);
fprintf(stderr, "%s\n", msg);
fflush(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;
}
static int dofsfile (lua_State *L, const char *name) {
int status = luaL_loadfsfile(L, name) || docall(L, 0, 1);
return report(L, status);
}
static int dolfsfile (lua_State *L, const char *name) {
int status = 1;
const char *code_fmt = "if node.flashindex('%s') then node.flashindex('%s')() end";
char *module_name = strdup(name);
unsigned name_len = strlen(name);
unsigned code_length = strlen(code_fmt) + name_len*2 + 1;
char *code_buf = malloc(code_length);
if (code_buf && module_name) {
char *dot = strrchr(module_name, '.');
if (dot) {
if (strstr(module_name, ".lua") == dot)
*dot = 0;
}
snprintf(code_buf, code_length, code_fmt, module_name, module_name);
status = luaL_dostring(L, code_buf);
if (status)
lua_pushfstring(L, "Failed to load %s from LFS", module_name);
} else {
lua_pushstring(L, "Failed to allocate memory");
}
if (module_name)
free(module_name);
if (code_buf)
free(code_buf);
return report(L, status);
}
static int dostring (lua_State *L, const char *s, const char *name) {
int status = luaL_loadbuffer(L, s, 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 (strstr(msg, LUA_QL("<eof>")) == tp) {
lua_pop(L, 1);
return 1;
}
}
return 0; /* else... */
}
/* 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 = 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;
}
#ifndef LUA_INIT_STRING
#define LUA_INIT_STRING "@init.lua"
#endif
static int handle_luainit (lua_State *L) {
const char *init = LUA_INIT_STRING;
if (init[0] == '@') {
#if CONFIG_NODEMCU_EMBEDDED_LFS_SIZE > 0
int status = dolfsfile(L, init+1);
if (status == 0)
return status;
#endif
return dofsfile(L, init+1);
} 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);
script = collectargs(argv, &has_i, &has_v, &has_e);
if (script < 0) { /* invalid args? */
s->status = 1;
return 0;
}
s->status = runargs(L, argv, (script > 0) ? script : s->argc);
if (s->status != 0) return 0;
return 0;
}
static void dojob(lua_Load *load);
static bool readline(lua_Load *load);
#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 = malloc(LUA_MAXINPUT);
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;
}
int lua_put_line(const char *s, size_t l) {
if (s == NULL || ++l > LUA_MAXINPUT || gLoad.line_position > 0)
return 0;
memcpy(gLoad.line, s, l);
gLoad.line[l] = '\0';
gLoad.line_position = l;
gLoad.done = 1;
NODE_DBG("Get command: %s\n", gLoad.line);
return 1;
}
void lua_handle_input (bool force)
{
while (gLoad.L && (force || readline (&gLoad))) {
NODE_DBG("Handle Input: first=%u, pos=%u, len=%u, actual=%u, line=%s\n", gLoad.firstline,
gLoad.line_position, gLoad.len, strlen(gLoad.line), gLoad.line);
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 = 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;
memset(load->line, 0, load->len);
printf(load->prmt);
fflush (stdout);
}
extern bool uart_on_data_cb(unsigned id, const char *buf, size_t len);
extern bool uart0_echo;
extern bool run_input;
extern uart_status_t uart_status[];
static char last_nl_char = '\0';
static bool readline(lua_Load *load){
// NODE_DBG("readline() is called.\n");
bool need_dojob = false;
char ch;
uart_status_t *us = & uart_status[CONSOLE_UART];
while (console_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) putchar(0x08);
if(uart0_echo) putchar(' ');
if(uart0_echo) putchar(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) putchar('\n');
uart_on_data_cb(CONSOLE_UART, load->line, load->line_position);
if (load->line_position == 0)
{
/* Get a empty line, then go to get a new line */
printf(load->prmt);
fflush (stdout);
} else {
load->done = 1;
need_dojob = true;
}
continue;
}
/* other control character or not an acsii character */
// if (ch < 0x20 || ch >= 0x80)
// {
// continue;
// }
/* echo */
if(uart0_echo) putchar(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( ((us->need_len!=0) && (load->line_position >= us->need_len)) || \
(load->line_position >= load->len) || \
((us->end_char>=0) && ((unsigned char)ch==(unsigned char)us->end_char)) )
{
uart_on_data_cb(CONSOLE_UART, load->line, load->line_position);
load->line_position = 0;
}
}
ch = 0;
}
if( (load->line_position > 0) && (!run_input) && (us->need_len==0) && (us->end_char<0) )
{
uart_on_data_cb(CONSOLE_UART, load->line, load->line_position);
load->line_position = 0;
}
return need_dojob;
}
Reference in New Issue View Git Blame Copy Permalink