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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <ctf_impl.h>
/*
* Simple doubly-linked list append routine. This implementation assumes that
* each list element contains an embedded ctf_list_t as the first member.
* An additional ctf_list_t is used to store the head (l_next) and tail
* (l_prev) pointers. The current head and tail list elements have their
* previous and next pointers set to NULL, respectively.
*/
void
ctf_list_append(ctf_list_t *lp, void *new)
{
ctf_list_t *p = lp->l_prev; /* p = tail list element */
ctf_list_t *q = new; /* q = new list element */
lp->l_prev = q;
q->l_prev = p;
q->l_next = NULL;
if (p != NULL)
p->l_next = q;
else
lp->l_next = q;
}
/*
* Prepend the specified existing element to the given ctf_list_t. The
* existing pointer should be pointing at a struct with embedded ctf_list_t.
*/
void
ctf_list_prepend(ctf_list_t *lp, void *new)
{
ctf_list_t *p = new; /* p = new list element */
ctf_list_t *q = lp->l_next; /* q = head list element */
lp->l_next = p;
p->l_prev = NULL;
p->l_next = q;
if (q != NULL)
q->l_prev = p;
else
lp->l_prev = p;
}
/*
* Delete the specified existing element from the given ctf_list_t. The
* existing pointer should be pointing at a struct with embedded ctf_list_t.
*/
void
ctf_list_delete(ctf_list_t *lp, void *existing)
{
ctf_list_t *p = existing;
if (p->l_prev != NULL)
p->l_prev->l_next = p->l_next;
else
lp->l_next = p->l_next;
if (p->l_next != NULL)
p->l_next->l_prev = p->l_prev;
else
lp->l_prev = p->l_prev;
}
/*
* Convert an encoded CTF string name into a pointer to a C string by looking
* up the appropriate string table buffer and then adding the offset.
*/
const char *
ctf_strraw(ctf_file_t *fp, uint_t name)
{
ctf_strs_t *ctsp = &fp->ctf_str[CTF_NAME_STID(name)];
if (ctsp->cts_strs != NULL && CTF_NAME_OFFSET(name) < ctsp->cts_len)
return (ctsp->cts_strs + CTF_NAME_OFFSET(name));
/* string table not loaded or corrupt offset */
return (NULL);
}
const char *
ctf_strptr(ctf_file_t *fp, uint_t name)
{
const char *s = ctf_strraw(fp, name);
return (s != NULL ? s : "(?)");
}
/*
* Same strdup(3C), but use ctf_alloc() to do the memory allocation.
*/
char *
ctf_strdup(const char *s1)
{
char *s2 = ctf_alloc(strlen(s1) + 1);
if (s2 != NULL)
(void) strcpy(s2, s1);
return (s2);
}
/*
* Store the specified error code into errp if it is non-NULL, and then
* return NULL for the benefit of the caller.
*/
ctf_file_t *
ctf_set_open_errno(int *errp, int error)
{
if (errp != NULL)
*errp = error;
return (NULL);
}
/*
* Store the specified error code into the CTF container, and then return
* CTF_ERR for the benefit of the caller.
*/
long
ctf_set_errno(ctf_file_t *fp, int err)
{
fp->ctf_errno = err;
return (CTF_ERR);
}
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