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Diffstat (limited to '')
-rw-r--r-- | src/VBox/ExtPacks/VBoxDTrace/onnv/common/ctf/ctf_util.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/VBox/ExtPacks/VBoxDTrace/onnv/common/ctf/ctf_util.c b/src/VBox/ExtPacks/VBoxDTrace/onnv/common/ctf/ctf_util.c new file mode 100644 index 00000000..c13c1d64 --- /dev/null +++ b/src/VBox/ExtPacks/VBoxDTrace/onnv/common/ctf/ctf_util.c @@ -0,0 +1,154 @@ +/* + * 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. + */ + +#ifndef VBOX +#pragma ident "%Z%%M% %I% %E% SMI" +#endif + +#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); +} |