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more command registration refactoring 

Split out the handler registration into its own function, and add a
few obviously missing NULL pointer error checking.
This commit is contained in:
Zachary T Welch 2009-11-21 13:33:32 -08:00
parent 25a7ac2c75
commit 607634f967
1 changed files with 38 additions and 16 deletions
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54
src/helper/command.c
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@ -266,6 +266,38 @@ static void command_free(struct command *c)
free(c);
}
static int register_command_handler(struct command *c)
{
int retval = -ENOMEM;
const char *full_name = command_name(c, '_');
if (NULL == full_name)
return retval;
const char *ocd_name = alloc_printf("ocd_%s", full_name);
if (NULL == full_name)
goto free_full_name;
Jim_CreateCommand(interp, ocd_name, script_command, c, NULL);
free((void *)ocd_name);
/* we now need to add an overrideable proc */
const char *override_name = alloc_printf("proc %s {args} {"
"if {[catch {eval ocd_%s $args}] == 0} "
"{return \"\"} else {return -code error}}",
full_name, full_name);
if (NULL == full_name)
goto free_full_name;
Jim_Eval_Named(interp, override_name, __THIS__FILE__, __LINE__);
free((void *)override_name);
retval = ERROR_OK;
free_full_name:
free((void *)full_name);
return retval;
}
struct command* register_command(struct command_context *context,
struct command *parent, const struct command_registration *cr)
{
@ -287,22 +319,12 @@ struct command* register_command(struct command_context *context,
if (NULL == c || NULL == c->handler)
return c;
const char *full_name = command_name(c, '_');
const char *ocd_name = alloc_printf("ocd_%s", full_name);
Jim_CreateCommand(interp, ocd_name, script_command, c, NULL);
free((void *)ocd_name);
/* we now need to add an overrideable proc */
const char *override_name = alloc_printf("proc %s {args} {"
"if {[catch {eval ocd_%s $args}] == 0} "
"{return \"\"} else {return -code error}}",
full_name, full_name);
Jim_Eval_Named(interp, override_name, __THIS__FILE__, __LINE__);
free((void *)override_name);
free((void *)full_name);
int retval = register_command_handler(c);
if (ERROR_OK != retval)
{
unregister_command(context, parent, name);
c = NULL;
}
return c;
}