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/* --------------------------------------------------------------------------
* Copyright 2003-2011 (inclusive) Nathan Angelacos
* (nangel@users.sourceforge.net)
*
* This file is part of haserl.
*
* Haserl is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2,
* as published by the Free Software Foundation.
*
* Haserl is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with haserl. If not, see <http://www.gnu.org/licenses/>.
*
* ------------------------------------------------------------------------ */
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <time.h>
#include <getopt.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include "common.h"
#include "h_error.h"
#include "h_lua.h"
#include "h_script.h"
#include "haserl.h"
extern lua_State *lua_vm;
/* attempts to open a file, tokenize and then process it as a haserl script */
int
h_lua_loadfile (lua_State * L)
{
script_t *scriptchain;
token_t *tokenchain;
buffer_t script_text;
int status;
/* get the filename */
const char *filename = luaL_checkstring (L, 1);
scriptchain = load_script ((char *) filename, NULL);
tokenchain = build_token_list (scriptchain, NULL);
preprocess_token_list (tokenchain);
process_token_list (&script_text, tokenchain);
free_token_list (tokenchain);
free_script_list (scriptchain);
/* script_text has the include file */
status = luaL_loadbuffer (L, (char *) script_text.data,
script_text.ptr - script_text.data, filename);
buffer_destroy (&script_text);
if (status)
{
lua_error (L);
}
return (1); /* we return one value, the buffer, as a function */
}
void
lua_exec (buffer_t * buf, char *str)
{
buffer_add (buf, str, strlen (str));
}
void
lua_doscript (buffer_t * script, char *name)
{
int status;
/* force the string to be null terminated */
buffer_add (script, "\0", 1);
status = luaL_loadbuffer (lua_vm, (char *) script->data,
strlen ((char *) script->data), name) ||
lua_pcall (lua_vm, 0, LUA_MULTRET, 0);
if (status && !lua_isnil (lua_vm, -1))
{
const char *msg = lua_tostring (lua_vm, -1);
if (msg == NULL)
msg = "(error object is not a string)";
die_with_message (NULL, NULL, msg);
}
}
/* Run the echo command in a subshell */
void
lua_echo (buffer_t * buf, char *str, size_t len)
{
static char echo_start[] = " io.write(";
char quote[200] = "]=]"; /* 197 nested comments is a problem */
if (len == 0)
return;
/* figure out if the string uses ]] ]=] ]==] etc in it */
while ((strstr (str, quote)) && (strlen (quote) < 198))
{
memmove (quote + strlen (quote) - 1, quote + strlen (quote) - 2, 3);
}
/* As of 5.1, nested comments are depreciated... sigh */
quote[0] = '[';
quote[strlen (quote) - 1] = quote[0];
while ((strstr (str, quote)) && (strlen (quote) < 198))
{
memmove (quote + strlen (quote) - 1, quote + strlen (quote) - 2, 3);
}
buffer_add (buf, echo_start, strlen (echo_start));
buffer_add (buf, quote, strlen (quote));
buffer_add (buf, str, len);
quote[0] = ']';
quote[strlen (quote) - 1] = quote[0];
buffer_add (buf, quote, strlen (quote));
buffer_add (buf, ")\n", 2);
}
/* do an evaluation */
void
lua_eval (buffer_t * buf, char *str, size_t len)
{
static char start[] = " io.write(tostring(";
static char end[] = "))\n";
if (len == 0)
return;
buffer_add (buf, start, strlen (start));
buffer_add (buf, str, len);
buffer_add (buf, end, strlen (end));
}
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