func.c

/*
** func.c for 42sh
**
** Made by seblu
** Login   <seblu@epita.fr>
**
** Started on  Tue Nov 14 14:52:39 2006 seblu
** Last update Thu Nov 23 11:38:33 2006 seblu
*/

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

#include <string.h>
#include "func.h"
#include "../ast/ast.h"
#include "../common/macro.h"

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

s_func			*func_init(void)
{
  s_func		*new;

  secmalloc(new, sizeof (s_func));
  new->count = 0;
  new->size = FUNC_DEFAULT_SIZE;
  secmalloc(new->table, new->size * sizeof (s_func_item));
  return new;
}

int			func_exist(s_func *func, const char *name)
{
  assert(func && name);
  for (register size_t i = 0; i < func->count; ++i)
    if (!strcmp(name, func->table[i].name))
      return 1;
  return 0;
}

int			func_add(s_func *func, char *name, s_ast_node *body)
{
  assert(func && name);
  //check for add or update
  for (register size_t i = 0; i < func->count; ++i)
    if (!strcmp(name, func->table[i].name)) {
      //update time
      ast_destruct(func->table[i].body);
      func->table[i].body = body;
      return 1;
    }
  //add time
  ++func->count;
  if (func->size < func->count) {
    func->size += FUNC_PADDING;
    secrealloc(func->table, func->table, func->size * sizeof (s_func_item));
  }
  func->table[func->count - 1].name = name;
  func->table[func->count - 1].body = body;
  return 0;
}

int			func_del(s_func *func, const char *name)
{
  register size_t	i;

  assert(func && name);
  for (i = 0; i < func->count; ++i)
    if (!strcmp(name, func->table[i].name))
      break;
  if (i >= func->count)
    return 0;
  free(func->table[i].name);
  ast_destruct(func->table[i].body);
  func->table[i] = func->table[--func->count];
  if (func->size - func->count > 2 * FUNC_PADDING) {
    func->size -= FUNC_PADDING;
    secrealloc(func->table, func->table, func->size * sizeof (s_func_item));
  }
  return 1;
}

s_ast_node		*func_get(s_func *func, const char *name)
{
  assert(func && name);
  for (register size_t i = 0; i < func->count; ++i)
    if (!strcmp(name, func->table[i].name))
      return func->table[i].body;
  return NULL;
}