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authorAndrew Tridgell <tridge@samba.org>2011-08-01 17:46:39 +1000
committerAndrew Tridgell <tridge@samba.org>2011-08-04 16:17:24 +1000
commit841d17ff83ff3737070117a32199164b0b006402 (patch)
treefd568c5c70a9e9d9b01ca50ba231cb71c295a973 /lib
parent4ba8069e3d33dca53780521026c972425c1d66c5 (diff)
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ldb: added ldb_parse_tree_walk()
this walks a ldb parse tree, calling a callback on each node Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org> Pair-Programmed-With: Amitay Isaacs <amitay@gmail.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/ldb/common/ldb_parse.c86
-rw-r--r--lib/ldb/include/ldb_module.h7
2 files changed, 77 insertions, 16 deletions
diff --git a/lib/ldb/common/ldb_parse.c b/lib/ldb/common/ldb_parse.c
index 8c6c2d993e..407af9f244 100644
--- a/lib/ldb/common/ldb_parse.c
+++ b/lib/ldb/common/ldb_parse.c
@@ -808,50 +808,104 @@ char *ldb_filter_from_tree(TALLOC_CTX *mem_ctx, const struct ldb_parse_tree *tre
/*
- replace any occurrences of an attribute name in the parse tree with a
- new name
+ walk a parse tree, calling the provided callback on each node
*/
-void ldb_parse_tree_attr_replace(struct ldb_parse_tree *tree,
- const char *attr,
- const char *replace)
+int ldb_parse_tree_walk(struct ldb_parse_tree *tree,
+ int (*callback)(struct ldb_parse_tree *tree, void *),
+ void *private_context)
{
unsigned int i;
+ int ret;
+
+ ret = callback(tree, private_context);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
switch (tree->operation) {
case LDB_OP_AND:
case LDB_OP_OR:
for (i=0;i<tree->u.list.num_elements;i++) {
- ldb_parse_tree_attr_replace(tree->u.list.elements[i],
- attr, replace);
+ ret = ldb_parse_tree_walk(tree->u.list.elements[i], callback, private_context);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
}
break;
case LDB_OP_NOT:
- ldb_parse_tree_attr_replace(tree->u.isnot.child, attr, replace);
+ ret = ldb_parse_tree_walk(tree->u.isnot.child, callback, private_context);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
break;
case LDB_OP_EQUALITY:
case LDB_OP_GREATER:
case LDB_OP_LESS:
case LDB_OP_APPROX:
- if (ldb_attr_cmp(tree->u.equality.attr, attr) == 0) {
- tree->u.equality.attr = replace;
+ case LDB_OP_SUBSTRING:
+ case LDB_OP_PRESENT:
+ case LDB_OP_EXTENDED:
+ break;
+ }
+ return LDB_SUCCESS;
+}
+
+struct parse_tree_attr_replace_ctx {
+ const char *attr;
+ const char *replace;
+};
+
+/*
+ callback for ldb_parse_tree_attr_replace()
+ */
+static int parse_tree_attr_replace(struct ldb_parse_tree *tree, void *private_context)
+{
+ struct parse_tree_attr_replace_ctx *ctx = private_context;
+ switch (tree->operation) {
+ case LDB_OP_EQUALITY:
+ case LDB_OP_GREATER:
+ case LDB_OP_LESS:
+ case LDB_OP_APPROX:
+ if (ldb_attr_cmp(tree->u.equality.attr, ctx->attr) == 0) {
+ tree->u.equality.attr = ctx->replace;
}
break;
case LDB_OP_SUBSTRING:
- if (ldb_attr_cmp(tree->u.substring.attr, attr) == 0) {
- tree->u.substring.attr = replace;
+ if (ldb_attr_cmp(tree->u.substring.attr, ctx->attr) == 0) {
+ tree->u.substring.attr = ctx->replace;
}
break;
case LDB_OP_PRESENT:
- if (ldb_attr_cmp(tree->u.present.attr, attr) == 0) {
- tree->u.present.attr = replace;
+ if (ldb_attr_cmp(tree->u.present.attr, ctx->attr) == 0) {
+ tree->u.present.attr = ctx->replace;
}
break;
case LDB_OP_EXTENDED:
if (tree->u.extended.attr &&
- ldb_attr_cmp(tree->u.extended.attr, attr) == 0) {
- tree->u.extended.attr = replace;
+ ldb_attr_cmp(tree->u.extended.attr, ctx->attr) == 0) {
+ tree->u.extended.attr = ctx->replace;
}
break;
+ default:
+ break;
}
+ return LDB_SUCCESS;
+}
+
+/*
+ replace any occurrences of an attribute name in the parse tree with a
+ new name
+*/
+void ldb_parse_tree_attr_replace(struct ldb_parse_tree *tree,
+ const char *attr,
+ const char *replace)
+{
+ struct parse_tree_attr_replace_ctx ctx;
+
+ ctx.attr = attr;
+ ctx.replace = replace;
+
+ ldb_parse_tree_walk(tree, parse_tree_attr_replace, &ctx);
}
/*
diff --git a/lib/ldb/include/ldb_module.h b/lib/ldb/include/ldb_module.h
index 22d24dbdea..fecf0c7ede 100644
--- a/lib/ldb/include/ldb_module.h
+++ b/lib/ldb/include/ldb_module.h
@@ -348,4 +348,11 @@ int ldb_init_module(const char *version);
*/
bool ldb_dn_replace_components(struct ldb_dn *dn, struct ldb_dn *new_dn);
+/*
+ walk a parse tree, calling the provided callback on each node
+*/
+int ldb_parse_tree_walk(struct ldb_parse_tree *tree,
+ int (*callback)(struct ldb_parse_tree *tree, void *),
+ void *private_context);
+
#endif