*/
#include "includes.h"
+#include "ldb/include/ldb.h"
+#include "ldb/include/ldb_private.h"
+/*
+ create a new ldb_message in a given memory context (NULL for top level)
+*/
+struct ldb_message *ldb_msg_new(void *mem_ctx)
+{
+ return talloc_zero(mem_ctx, struct ldb_message);
+}
/*
find an element in a message by attribute name
struct ldb_message_element *ldb_msg_find_element(const struct ldb_message *msg,
const char *attr_name)
{
- int i;
+ unsigned int i;
for (i=0;i<msg->num_elements;i++) {
if (ldb_attr_cmp(msg->elements[i].name, attr_name) == 0) {
return &msg->elements[i];
struct ldb_val *ldb_msg_find_val(const struct ldb_message_element *el,
struct ldb_val *val)
{
- int i;
+ unsigned int i;
for (i=0;i<el->num_values;i++) {
if (ldb_val_equal_exact(val, &el->values[i])) {
return &el->values[i];
return NULL;
}
+/*
+ duplicate a ldb_val structure
+*/
+struct ldb_val ldb_val_dup(TALLOC_CTX *mem_ctx,
+ const struct ldb_val *v)
+{
+ struct ldb_val v2;
+ v2.length = v->length;
+ if (v->length == 0) {
+ v2.data = NULL;
+ return v2;
+ }
+
+ /* the +1 is to cope with buggy C library routines like strndup
+ that look one byte beyond */
+ v2.data = talloc_array(mem_ctx, char, v->length+1);
+ if (!v2.data) {
+ v2.length = 0;
+ return v2;
+ }
+
+ memcpy(v2.data, v->data, v->length);
+ ((char *)v2.data)[v->length] = 0;
+ return v2;
+}
/*
add an empty element to a message
{
struct ldb_message_element *els;
- els = ldb_realloc_p(ldb, msg->elements,
- struct ldb_message_element, msg->num_elements+1);
+ els = talloc_realloc(msg, msg->elements,
+ struct ldb_message_element, msg->num_elements+1);
if (!els) {
errno = ENOMEM;
return -1;
els[msg->num_elements].values = NULL;
els[msg->num_elements].num_values = 0;
els[msg->num_elements].flags = flags;
- els[msg->num_elements].name = ldb_strdup(ldb, attr_name);
+ els[msg->num_elements].name = talloc_strdup(els, attr_name);
if (!els[msg->num_elements].name) {
return -1;
}
int ldb_msg_add_value(struct ldb_context *ldb,
struct ldb_message *msg,
const char *attr_name,
- struct ldb_val *val)
+ const struct ldb_val *val)
{
struct ldb_message_element *el;
struct ldb_val *vals;
return -1;
}
- vals = ldb_realloc_p(ldb, el->values, struct ldb_val, el->num_values+1);
+ vals = talloc_realloc(msg, el->values, struct ldb_val, el->num_values+1);
if (!vals) {
errno = ENOMEM;
return -1;
add a string element to a message
*/
int ldb_msg_add_string(struct ldb_context *ldb, struct ldb_message *msg,
- char *attr_name, char *str)
+ const char *attr_name, const char *str)
{
struct ldb_val val;
- val.data = str;
+ val.data = discard_const_p(char, str);
+ val.length = strlen(str);
+
+ return ldb_msg_add_value(ldb, msg, attr_name, &val);
+}
+
+/*
+ add a printf formatted element to a message
+*/
+int ldb_msg_add_fmt(struct ldb_context *ldb, struct ldb_message *msg,
+ const char *attr_name, const char *fmt, ...)
+{
+ struct ldb_val val;
+ va_list ap;
+ char *str;
+
+ va_start(ap, fmt);
+ str = talloc_vasprintf(msg, fmt, ap);
+ va_end(ap);
+
+ if (str == NULL) return -1;
+
+ val.data = str;
val.length = strlen(str);
return ldb_msg_add_value(ldb, msg, attr_name, &val);
int ldb_msg_element_compare(struct ldb_message_element *el1,
struct ldb_message_element *el2)
{
- int i;
+ unsigned int i;
if (el1->num_values != el2->num_values) {
return el1->num_values - el2->num_values;
return 0;
}
+/*
+ compare two ldb_message_element structures
+ comparing by element name
+*/
+int ldb_msg_element_compare_name(struct ldb_message_element *el1,
+ struct ldb_message_element *el2)
+{
+ return ldb_attr_cmp(el1->name, el2->name);
+}
+
/*
convenience functions to return common types from a message
these return the first value if the attribute is multi-valued
unsigned int ldb_msg_find_uint(const struct ldb_message *msg,
const char *attr_name,
- int default_value)
+ unsigned int default_value)
{
const struct ldb_val *v = ldb_msg_find_ldb_val(msg, attr_name);
if (!v || !v->data) {
return strtoul(v->data, NULL, 0);
}
+int64_t ldb_msg_find_int64(const struct ldb_message *msg,
+ const char *attr_name,
+ int64_t default_value)
+{
+ const struct ldb_val *v = ldb_msg_find_ldb_val(msg, attr_name);
+ if (!v || !v->data) {
+ return default_value;
+ }
+ return strtoll(v->data, NULL, 0);
+}
+
+uint64_t ldb_msg_find_uint64(const struct ldb_message *msg,
+ const char *attr_name,
+ uint64_t default_value)
+{
+ const struct ldb_val *v = ldb_msg_find_ldb_val(msg, attr_name);
+ if (!v || !v->data) {
+ return default_value;
+ }
+ return strtoull(v->data, NULL, 0);
+}
+
double ldb_msg_find_double(const struct ldb_message *msg,
const char *attr_name,
double default_value)
}
return v->data;
}
+
+
+/*
+ sort the elements of a message by name
+*/
+void ldb_msg_sort_elements(struct ldb_message *msg)
+{
+ qsort(msg->elements, msg->num_elements, sizeof(struct ldb_message_element),
+ (comparison_fn_t)ldb_msg_element_compare_name);
+}
+
+
+/*
+ free a message created using ldb_msg_copy
+*/
+void ldb_msg_free(struct ldb_context *ldb, struct ldb_message *msg)
+{
+ talloc_free(msg);
+}
+
+/*
+ copy a message, allocating new memory for all parts
+*/
+struct ldb_message *ldb_msg_copy(struct ldb_context *ldb,
+ const struct ldb_message *msg)
+{
+ struct ldb_message *msg2;
+ int i, j;
+
+ msg2 = talloc(ldb, struct ldb_message);
+ if (msg2 == NULL) return NULL;
+
+ msg2->elements = NULL;
+ msg2->num_elements = 0;
+ msg2->private_data = NULL;
+
+ msg2->dn = talloc_strdup(msg2, msg->dn);
+ if (msg2->dn == NULL) goto failed;
+
+ msg2->elements = talloc_array(msg2, struct ldb_message_element, msg->num_elements);
+ if (msg2->elements == NULL) goto failed;
+
+ for (i=0;i<msg->num_elements;i++) {
+ struct ldb_message_element *el1 = &msg->elements[i];
+ struct ldb_message_element *el2 = &msg2->elements[i];
+
+ el2->flags = el1->flags;
+ el2->num_values = 0;
+ el2->values = NULL;
+ el2->name = talloc_strdup(msg2->elements, el1->name);
+ if (el2->name == NULL) goto failed;
+ el2->values = talloc_array(msg2->elements, struct ldb_val, el1->num_values);
+ for (j=0;j<el1->num_values;j++) {
+ el2->values[j] = ldb_val_dup(ldb, &el1->values[j]);
+ if (el2->values[j].data == NULL &&
+ el1->values[j].length != 0) {
+ goto failed;
+ }
+ el2->values[j].data = talloc_steal(el2->values, el2->values[j].data);
+ el2->num_values++;
+ }
+
+ msg2->num_elements++;
+ }
+
+ return msg2;
+
+failed:
+ talloc_free(msg2);
+ return NULL;
+}
+
+
+/*
+ canonicalise a message, merging elements of the same name
+*/
+struct ldb_message *ldb_msg_canonicalize(struct ldb_context *ldb,
+ const struct ldb_message *msg)
+{
+ int i;
+ struct ldb_message *msg2;
+
+ msg2 = ldb_msg_copy(ldb, msg);
+ if (msg2 == NULL) return NULL;
+
+ ldb_msg_sort_elements(msg2);
+
+ for (i=1;i<msg2->num_elements;i++) {
+ struct ldb_message_element *el1 = &msg2->elements[i-1];
+ struct ldb_message_element *el2 = &msg2->elements[i];
+ if (ldb_msg_element_compare_name(el1, el2) == 0) {
+ el1->values = talloc_realloc(msg2->elements, el1->values, struct ldb_val,
+ el1->num_values + el2->num_values);
+ if (el1->values == NULL) {
+ return NULL;
+ }
+ memcpy(el1->values + el1->num_values,
+ el2->values,
+ sizeof(struct ldb_val) * el2->num_values);
+ el1->num_values += el2->num_values;
+ talloc_free(el2->name);
+ if (i+1<msg2->num_elements) {
+ memmove(el2, el2+1, sizeof(struct ldb_message_element) *
+ (msg2->num_elements - (i+1)));
+ }
+ msg2->num_elements--;
+ i--;
+ }
+ }
+
+ return msg2;
+}
+
+
+/*
+ return a ldb_message representing the differences between msg1 and msg2. If you
+ then use this in a ldb_modify() call it can be used to save edits to a message
+*/
+struct ldb_message *ldb_msg_diff(struct ldb_context *ldb,
+ struct ldb_message *msg1,
+ struct ldb_message *msg2)
+{
+ struct ldb_message *mod;
+ struct ldb_message_element *el;
+ unsigned int i;
+
+ mod = ldb_msg_new(ldb);
+
+ mod->dn = msg1->dn;
+ mod->num_elements = 0;
+ mod->elements = NULL;
+
+ msg2 = ldb_msg_canonicalize(ldb, msg2);
+ if (msg2 == NULL) {
+ return NULL;
+ }
+
+ /* look in msg2 to find elements that need to be added
+ or modified */
+ for (i=0;i<msg2->num_elements;i++) {
+ el = ldb_msg_find_element(msg1, msg2->elements[i].name);
+
+ if (el && ldb_msg_element_compare(el, &msg2->elements[i]) == 0) {
+ continue;
+ }
+
+ if (ldb_msg_add(ldb, mod,
+ &msg2->elements[i],
+ el?LDB_FLAG_MOD_REPLACE:LDB_FLAG_MOD_ADD) != 0) {
+ return NULL;
+ }
+ }
+
+ /* look in msg1 to find elements that need to be deleted */
+ for (i=0;i<msg1->num_elements;i++) {
+ el = ldb_msg_find_element(msg2, msg1->elements[i].name);
+ if (!el) {
+ if (ldb_msg_add_empty(ldb, mod,
+ msg1->elements[i].name,
+ LDB_FLAG_MOD_DELETE) != 0) {
+ return NULL;
+ }
+ }
+ }
+
+ return mod;
+}
git.samba.org / kamenim / samba.git / blobdiff