105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2007,2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/misc.h>
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#include <grub/script_sh.h>
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#include <grub/parser.h>
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#include <grub/mm.h>
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grub_script_function_t grub_script_function_list;
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grub_script_function_t
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grub_script_function_create (struct grub_script_arg *functionname_arg,
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struct grub_script *cmd)
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{
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grub_script_function_t func;
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grub_script_function_t *p;
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func = (grub_script_function_t) grub_malloc (sizeof (*func));
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if (! func)
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return 0;
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func->name = grub_strdup (functionname_arg->str);
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if (! func->name)
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{
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grub_free (func);
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return 0;
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}
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func->func = cmd;
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/* Keep the list sorted for simplicity. */
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p = &grub_script_function_list;
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while (*p)
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{
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if (grub_strcmp ((*p)->name, func->name) >= 0)
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break;
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p = &((*p)->next);
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}
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/* If the function already exists, overwrite the old function. */
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if (*p && grub_strcmp ((*p)->name, func->name) == 0)
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{
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grub_script_function_t q;
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q = *p;
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grub_script_free (q->func);
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q->func = cmd;
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grub_free (func);
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func = q;
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}
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else
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{
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func->next = *p;
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*p = func;
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}
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return func;
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}
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void
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grub_script_function_remove (const char *name)
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{
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grub_script_function_t *p, q;
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for (p = &grub_script_function_list, q = *p; q; p = &(q->next), q = q->next)
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if (grub_strcmp (name, q->name) == 0)
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{
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*p = q->next;
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grub_free (q->name);
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grub_script_free (q->func);
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grub_free (q);
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break;
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}
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}
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grub_script_function_t
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grub_script_function_find (char *functionname)
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{
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grub_script_function_t func;
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for (func = grub_script_function_list; func; func = func->next)
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if (grub_strcmp (functionname, func->name) == 0)
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break;
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if (! func)
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grub_error (GRUB_ERR_UNKNOWN_COMMAND, "unknown command `%.20s'", functionname);
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return func;
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}
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