/*
** shell.c for 42sh
**
** Made by Seblu
** Login   <seblu@epita.fr>
**
** Started on  Mon Apr 10 23:57:28 2006 Seblu
** Last update Tue Nov 14 15:46:38 2006 seblu
*/

#include <stdio.h>
#include "shell.h"
#include "option.h"
#include "../ast/ast.h"
#include "../parser/parser.h"
#include "../exec/exec.h"
#include "../common/macro.h"
#include "../common/function.h"

/*
** ============
** DECLARATIONS
** ============
*/

/*
** Global shell structure
*/
s_shell		*shell = NULL;

/*!
** Program entry point
**
** @param argc Argument count
** @param argv Argument vector
**
** @return return program value
*/
int		main(int argc, char *argv[]);

/*!
** Initialize a shell structure
**
** @param path path of the current shell
**
** @return an initialized shell structure
*/
s_shell		*shell_init(void);

/*
** ===========
** DEFINITIONS
** ===========
*/

int		main(int argc, char *argv[])
{
  s_ast_node	*ast;
  s_parser	*parser;

  // shell initialization
  shell = shell_init();
  // Set shell name
  shell->name = basename(argv[0]);
  // Set default option
  option_set_default(shell->option);
  // parse argv for user options
  getoptions(shell->option, argc, argv);
  //FIXME: set PWD et OLDPWD variable
  // shell parser init
  parser = parser_init(STDIN_FILENO);
  // parse and execute stdin stream
  do {
    ast = parse(parser);
    if (parser->error && isinteractive())
      continue;
    else if (parser->error)
      return ERROR_PARSE;
    if (option_isset(shell->option, "ast_print"))
      ast_print(ast, NULL);
    if (ast)
      exec_node(ast);
    ast_destruct(ast);
  }
  while (!parser->lexer->eof);
  if (isinteractive())
    fprintf(stderr, "exit\n");
  return shell->status;
}

s_shell		*shell_init(void)
{
  s_shell	*new;

  secmalloc(new, sizeof (s_shell));
  new->var = var_init();
  new->func = func_init();
  new->alias = alias_init();
  new->option = option_init();
  new->name = "42sh";
  new->status = 0;
  return new;
}