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repl.c
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repl.c
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/* This file is part of Zenroom (https://zenroom.dyne.org)
*
* Copyright (C) 2017-2019 Dyne.org foundation
* designed, written and maintained by Denis Roio <jaromil@dyne.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <zen_error.h>
#include <zenroom.h>
#include <lua.h>
#include <lauxlib.h>
#include <lua_functions.h>
#include <zen_memory.h>
extern int zen_exec_script(zenroom_t *Z, const char *script);
#ifndef LIBRARY
int repl_read(lua_State *lua) {
char *line = NULL;
line = malloc(MAX_STRING);
size_t len =0;
len = read(STDIN_FILENO, line, MAX_STRING);
line[len] = '\0';
lua_pushlstring(lua, line, len);
free(line);
return 1;
}
int repl_flush(lua_State *lua) {
(void)lua;
fflush(stdout);
return 0;
}
int repl_write(lua_State *lua) {
size_t len;
const char *line = luaL_checklstring(lua,1,&len);
if(len>MAX_STRING) {
zerror(lua, "Error: LUA string too long");
return 0; }
int nop = write(STDOUT_FILENO, line, len);
(void)nop;
return 0;
}
size_t repl_prompt(int ret, char *line) {
size_t len = 0;
char *prompt;
if(ret) prompt="zen! \0";
else prompt="zen> \0";
int nop = write(STDOUT_FILENO, prompt, 5);
(void)nop;
len = read(STDIN_FILENO, line, MAX_STRING);
line[len] = '\0';
return(len);
}
int repl_loop(zenroom_t *Z) {
char *line = NULL;
line = malloc(MAX_STRING);
if(!Z) return EXIT_FAILURE;
int ret =0;
while(repl_prompt(ret, line)) {
ret = zen_exec_script(Z, line);
if(ret) break;
}
free(line);
return(ret);
}
#endif