/* Free the memory reserved for CMD and all of it's children. */
void
grub_script_free (struct grub_script *script)
{
if (!script)
return;
grub_script_mem_free (script->mem);
grub_free (script);
}
/* Parse the script passed in SCRIPT and return the parsed
datastructure that is ready to be interpreted. */
struct grub_script *
grub_script_parse (char *script, grub_reader_getline_t getline)
{
struct grub_script *parsed;
struct grub_script_mem *membackup;
struct grub_lexer_param *lexstate;
struct grub_parser_param *parsestate;
parsed = grub_script_create (0, 0);
if (!parsed)
return 0;
parsestate = grub_zalloc (sizeof (*parsestate));
if (!parsestate)
{
grub_free (parsed);
return 0;
}
/* Initialize the lexer. */
lexstate = grub_script_lexer_init (parsestate, script, getline);
if (!lexstate)
{
grub_free (parsed);
grub_free (parsestate);
return 0;
}
parsestate->lexerstate = lexstate;
membackup = grub_script_mem_record (parsestate);
/* Parse the script. */
if (grub_script_yyparse (parsestate) || parsestate->err)
{
struct grub_script_mem *memfree;
memfree = grub_script_mem_record_stop (parsestate, membackup);
grub_script_mem_free (memfree);
grub_script_lexer_fini (lexstate);
grub_free (parsestate);
grub_free (parsed);
return 0;
}
parsed->mem = grub_script_mem_record_stop (parsestate, membackup);
parsed->cmd = parsestate->parsed;
parsed->children = parsestate->scripts;
grub_script_lexer_fini (lexstate);
grub_free (parsestate);
return parsed;
}
struct grub_script *
grub_script_create (struct grub_script_cmd *cmd, struct grub_script_mem *mem)
{
struct grub_script *parsed;
parsed = grub_malloc (sizeof (*parsed));
if (!parsed)
{
grub_script_mem_free (mem);
grub_free (cmd);
return 0;
}
parsed->mem = mem;
parsed->cmd = cmd;
return parsed;
}
/* Free the memory reserved for CMD and all of it's children. */
void
grub_script_free (struct grub_script *script)
{
struct grub_script *s;
struct grub_script *t;
if (! script)
return;
if (script->mem)
grub_script_mem_free (script->mem);
s = script->children;
while (s) {
t = s->next_siblings;
grub_script_unref (s);
s = t;
}
grub_free (script);
}
