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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2005,2007,2009,2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/misc.h>
#include <grub/script_sh.h>
#include <grub/parser.h>
#include <grub/mm.h>
#include <grub/charset.h>
grub_script_function_t grub_script_function_list;
grub_script_function_t
grub_script_function_create (struct grub_script_arg *functionname_arg,
struct grub_script *cmd)
{
grub_script_function_t func;
grub_script_function_t *p;
func = (grub_script_function_t) grub_malloc (sizeof (*func));
if (! func)
return 0;
func->executing = 0;
func->name = grub_strdup (functionname_arg->str);
if (! func->name)
{
grub_free (func);
return 0;
}
func->func = cmd;
/* Keep the list sorted for simplicity. */
p = &grub_script_function_list;
while (*p)
{
if (grub_strcmp ((*p)->name, func->name) >= 0)
break;
p = &((*p)->next);
}
/* If the function already exists, overwrite the old function. */
if (*p && grub_strcmp ((*p)->name, func->name) == 0)
{
grub_script_function_t q;
q = *p;
grub_free (func);
if (q->executing > 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT,
N_("attempt to redefine a function being executed"));
func = NULL;
}
else
{
grub_script_free (q->func);
q->func = cmd;
func = q;
}
}
else
{
func->next = *p;
*p = func;
}
return func;
}
void
grub_script_function_remove (const char *name)
{
grub_script_function_t *p, q;
for (p = &grub_script_function_list, q = *p; q; p = &(q->next), q = q->next)
if (grub_strcmp (name, q->name) == 0)
{
*p = q->next;
grub_free (q->name);
grub_script_free (q->func);
grub_free (q);
break;
}
}
grub_script_function_t
grub_script_function_find (char *functionname)
{
grub_script_function_t func;
for (func = grub_script_function_list; func; func = func->next)
if (grub_strcmp (functionname, func->name) == 0)
break;
if (! func)
{
char tmp[21];
grub_strncpy (tmp, functionname, 20);
tmp[20] = 0;
/* Avoid truncating inside UTF-8 character. */
tmp[grub_getend (tmp, tmp + grub_strlen (tmp))] = 0;
grub_error (GRUB_ERR_UNKNOWN_COMMAND, N_("can't find command `%s'"), tmp);
}
return func;
}
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