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https://github.com/samba-team/samba.git
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ea55b1350b
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org>
233 lines
4.5 KiB
C
233 lines
4.5 KiB
C
/*
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Copyright (c) Ralph Boehme 2012-2014
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include <talloc.h>
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#include "dalloc.h"
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/**
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* Dynamic Datastore
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**/
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struct dalloc_ctx {
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void **dd_talloc_array;
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};
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void *_dalloc_new(TALLOC_CTX *mem_ctx, const char *type)
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{
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void *p;
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p = talloc_zero(mem_ctx, DALLOC_CTX);
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if (p == NULL) {
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return NULL;
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}
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talloc_set_name_const(p, type);
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return p;
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}
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int _dalloc_add_talloc_chunk(DALLOC_CTX *dd, void *obj, const char *type, size_t size)
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{
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size_t array_len = talloc_array_length(dd->dd_talloc_array);
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dd->dd_talloc_array = talloc_realloc(dd,
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dd->dd_talloc_array,
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void *,
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array_len + 1);
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if (dd->dd_talloc_array == NULL) {
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return -1;
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}
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if (size != 0) {
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void *p;
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p = talloc_named_const(dd->dd_talloc_array, size, type);
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if (p == NULL) {
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return -1;
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}
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memcpy(p, obj, size);
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obj = p;
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} else {
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_talloc_get_type_abort(obj, type, __location__);
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}
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dd->dd_talloc_array[array_len] = obj;
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return 0;
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}
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/* Get number of elements, returns 0 if the structure is empty or not initialized */
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size_t dalloc_size(const DALLOC_CTX *d)
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{
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if (d == NULL) {
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return 0;
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}
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if (d->dd_talloc_array == NULL) {
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return 0;
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}
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return talloc_array_length(d->dd_talloc_array);
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}
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/* Return element at position */
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void *dalloc_get_object(const DALLOC_CTX *d, int i)
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{
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size_t size = dalloc_size(d);
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if (i >= size) {
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return NULL;
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}
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return d->dd_talloc_array[i];
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}
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/* Return typename of element at position */
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const char *dalloc_get_name(const DALLOC_CTX *d, int i)
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{
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void *o = dalloc_get_object(d, i);
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if (o == NULL) {
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return NULL;
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}
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return talloc_get_name(o);
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}
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/*
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* Get pointer to value from a DALLOC object
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*
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* Returns pointer to object from a DALLOC object. Nested object interation
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* is supported by using the type string "DALLOC_CTX". Any other type string
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* designates the requested objects type.
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*/
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void *dalloc_get(const DALLOC_CTX *d, ...)
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{
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int result = 0;
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void *p = NULL;
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va_list args;
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const char *type;
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int elem;
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va_start(args, d);
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type = va_arg(args, const char *);
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while (strcmp(type, "DALLOC_CTX") == 0) {
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elem = va_arg(args, int);
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if (elem >= talloc_array_length(d->dd_talloc_array)) {
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result = -1;
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goto done;
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}
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d = d->dd_talloc_array[elem];
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type = va_arg(args, const char *);
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}
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elem = va_arg(args, int);
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if (elem >= talloc_array_length(d->dd_talloc_array)) {
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result = -1;
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goto done;
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}
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p = talloc_check_name(d->dd_talloc_array[elem], type);
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if (p == NULL) {
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result = -1;
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goto done;
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}
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done:
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va_end(args);
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if (result != 0) {
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p = NULL;
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}
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return p;
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}
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void *dalloc_value_for_key(const DALLOC_CTX *d, ...)
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{
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int result = 0;
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void *p = NULL;
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va_list args;
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const char *type;
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int elem;
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size_t array_len;
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va_start(args, d);
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type = va_arg(args, const char *);
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while (strcmp(type, "DALLOC_CTX") == 0) {
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array_len = talloc_array_length(d->dd_talloc_array);
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elem = va_arg(args, int);
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if (elem >= array_len) {
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va_end(args);
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result = -1;
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goto done;
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}
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d = d->dd_talloc_array[elem];
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type = va_arg(args, const char *);
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}
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va_end(args);
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array_len = talloc_array_length(d->dd_talloc_array);
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for (elem = 0; elem + 1 < array_len; elem += 2) {
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if (strcmp(talloc_get_name(d->dd_talloc_array[elem]), "char *") != 0) {
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result = -1;
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goto done;
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}
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if (strcmp((char *)d->dd_talloc_array[elem],type) == 0) {
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p = d->dd_talloc_array[elem + 1];
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break;
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}
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}
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done:
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if (result != 0) {
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p = NULL;
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}
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return p;
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}
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static char *dalloc_strdup(TALLOC_CTX *mem_ctx, const char *string)
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{
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char *p;
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p = talloc_strdup(mem_ctx, string);
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if (p == NULL) {
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return NULL;
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}
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talloc_set_name_const(p, "char *");
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return p;
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}
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int dalloc_stradd(DALLOC_CTX *d, const char *string)
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{
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int result;
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char *p;
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p = dalloc_strdup(d, string);
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if (p == NULL) {
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return -1;
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}
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result = dalloc_add(d, p, char *);
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if (result != 0) {
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return -1;
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}
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return 0;
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}
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