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/*
** $Id: lua.c,v 1.8 1997/12/11 14:48:46 roberto Exp roberto $
** Lua stand-alone interpreter
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#include <string.h>
#include "lua.h"
#include "luadebug.h"
#include "lualib.h"
#ifndef OLD_ANSI
#include <locale.h>
#else
#define setlocale(a,b) 0
#endif
#ifdef _POSIX_SOURCE
#include <unistd.h>
#else
#define isatty(x) (x==0) /* assume stdin is a tty */
#endif
static void assign (char *arg)
{
if (strlen(arg) >= 500)
fprintf(stderr, "lua: shell argument too long");
else {
char buffer[500];
char *eq = strchr(arg, '=');
lua_pushstring(eq+1);
strncpy(buffer, arg, eq-arg);
buffer[eq-arg] = 0;
lua_setglobal(buffer);
}
}
#define BUF_SIZE 512
static void manual_input (int prompt)
{
if (isatty(0)) {
int cont = 1;
while (cont) {
char buffer[BUF_SIZE];
int i = 0;
lua_beginblock();
if (prompt)
printf("%s", lua_getstring(lua_getglobal("_PROMPT")));
for(;;) {
int c = getchar();
if (c == EOF) {
cont = 0;
break;
}
else if (c == '\n') {
if (i>0 && buffer[i-1] == '\\')
buffer[i-1] = '\n';
else break;
}
else if (i >= BUF_SIZE-1) {
fprintf(stderr, "lua: argument line too long\n");
break;
}
else buffer[i++] = c;
}
buffer[i] = 0;
lua_dostring(buffer);
lua_endblock();
}
printf("\n");
}
else
lua_dofile(NULL); /* executes stdin as a file */
}
int main (int argc, char *argv[])
{
int i;
setlocale(LC_ALL, "");
lua_iolibopen();
lua_strlibopen();
lua_mathlibopen();
lua_pushstring("> "); lua_setglobal("_PROMPT");
if (argc < 2) {
printf("%s %s\n", LUA_VERSION, LUA_COPYRIGHT);
manual_input(1);
}
else for (i=1; i<argc; i++) {
if (strcmp(argv[i], "-") == 0)
manual_input(1);
else if (strcmp(argv[i], "-q") == 0)
manual_input(0);
else if (strcmp(argv[i], "-d") == 0)
lua_debug = 1;
else if (strcmp(argv[i], "-v") == 0)
printf("%s %s\n(written by %s)\n\n",
LUA_VERSION, LUA_COPYRIGHT, LUA_AUTHORS);
else if (strcmp(argv[i], "-e") == 0) {
i++;
if (lua_dostring(argv[i]) != 0) {
fprintf(stderr, "lua: error running argument `%s'\n", argv[i]);
return 1;
}
}
else if (strchr(argv[i], '='))
assign(argv[i]);
else {
int result = lua_dofile(argv[i]);
if (result) {
if (result == 2) {
fprintf(stderr, "lua: cannot execute file ");
perror(argv[i]);
}
return 1;
}
}
}
#ifdef DEBUG
lua_close();
#endif
return 0;
}
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