X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fuci.git;a=blobdiff_plain;f=list.c;h=006e2a0ca8d2741f84731c62fc80eecebf877ef9;hp=e770234424ae92d2b7c109e64f28a847a9ee5ac9;hb=ec8cbbbe0f20e67cbd3bd471b9ac55ceacaef7b8;hpb=563f8dd6f0eb56780a00f5856bf7fcf40e39d845

diff --git a/list.c b/list.c
index e770234..006e2a0 100644
--- a/list.c
+++ b/list.c
@@ -9,50 +9,35 @@
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
  */
 
-/* initialize a list head/item */
-static inline void uci_list_init(struct uci_list *ptr)
+static void uci_list_set_pos(struct uci_list *head, struct uci_list *ptr, int pos)
 {
-	ptr->prev = ptr;
-	ptr->next = ptr;
-}
+	struct uci_list *new_head = head;
+	struct uci_element *p = NULL;
 
-/* inserts a new list entry after a given entry */
-static inline void uci_list_insert(struct uci_list *list, struct uci_list *ptr)
-{
-	list->next->prev = ptr;
-	ptr->prev = list;
-	ptr->next = list->next;
-	list->next = ptr;
-}
+	uci_list_del(ptr);
+	uci_foreach_element(head, p) {
+		if (pos-- <= 0)
+			break;
+		new_head = &p->list;
+	}
 
-/* inserts a new list entry at the tail of the list */
-static inline void uci_list_add(struct uci_list *head, struct uci_list *ptr)
-{
-	/* NB: head->prev points at the tail */
-	uci_list_insert(head->prev, ptr);
+	uci_list_add(new_head->next, ptr);
 }
 
-static inline void uci_list_del(struct uci_list *ptr)
+static inline void uci_list_fixup(struct uci_list *ptr)
 {
-	struct uci_list *next, *prev;
-
-	next = ptr->next;
-	prev = ptr->prev;
-
-	prev->next = next;
-	next->prev = prev;
-
-	uci_list_init(ptr);
+	ptr->prev->next = ptr;
+	ptr->next->prev = ptr;
 }
 
 /* 
  * uci_alloc_generic allocates a new uci_element with payload
  * payload is appended to the struct to save memory and reduce fragmentation
  */
-static struct uci_element *
+__private struct uci_element *
 uci_alloc_generic(struct uci_context *ctx, int type, const char *name, int size)
 {
 	struct uci_element *e;
@@ -78,7 +63,7 @@ done:
 	return e;
 }
 
-static void
+__private void
 uci_free_element(struct uci_element *e)
 {
 	if (e->name)
@@ -143,8 +128,24 @@ uci_alloc_list(struct uci_section *s, const char *name)
 	return o;
 }
 
+/* Based on an efficient hash function published by D. J. Bernstein */
+static unsigned int djbhash(unsigned int hash, char *str)
+{
+	int len = strlen(str);
+	int i;
+
+	/* initial value */
+	if (hash == ~0)
+		hash = 5381;
+
+	for(i = 0; i < len; i++) {
+		hash = ((hash << 5) + hash) + str[i];
+	}
+	return (hash & 0x7FFFFFFF);
+}
+
 /* fix up an unnamed section, e.g. after adding options to it */
-static void uci_fixup_section(struct uci_context *ctx, struct uci_section *s)
+__private void uci_fixup_section(struct uci_context *ctx, struct uci_section *s)
 {
 	unsigned int hash = ~0;
 	struct uci_element *e;
@@ -224,12 +225,12 @@ uci_alloc_package(struct uci_context *ctx, const char *name)
 	p = uci_alloc_element(ctx, package, name, 0);
 	p->ctx = ctx;
 	uci_list_init(&p->sections);
-	uci_list_init(&p->history);
-	uci_list_init(&p->saved_history);
+	uci_list_init(&p->delta);
+	uci_list_init(&p->saved_delta);
 	return p;
 }
 
-static void
+__private void
 uci_free_package(struct uci_package **package)
 {
 	struct uci_element *e, *tmp;
@@ -243,11 +244,11 @@ uci_free_package(struct uci_package **package)
 	uci_foreach_element_safe(&p->sections, tmp, e) {
 		uci_free_section(uci_to_section(e));
 	}
-	uci_foreach_element_safe(&p->history, tmp, e) {
-		uci_free_history(uci_to_history(e));
+	uci_foreach_element_safe(&p->delta, tmp, e) {
+		uci_free_delta(uci_to_delta(e));
 	}
-	uci_foreach_element_safe(&p->saved_history, tmp, e) {
-		uci_free_history(uci_to_history(e));
+	uci_foreach_element_safe(&p->saved_delta, tmp, e) {
+		uci_free_delta(uci_to_delta(e));
 	}
 	uci_free_element(&p->e);
 	*package = NULL;
@@ -269,7 +270,8 @@ uci_free_any(struct uci_element **e)
 	*e = NULL;
 }
 
-static struct uci_element *uci_lookup_list(struct uci_list *list, const char *name)
+__private struct uci_element *
+uci_lookup_list(struct uci_list *list, const char *name)
 {
 	struct uci_element *e;
 
@@ -280,7 +282,8 @@ static struct uci_element *uci_lookup_list(struct uci_list *list, const char *na
 	return NULL;
 }
 
-static struct uci_element *uci_lookup_ext_section(struct uci_context *ctx, struct uci_ptr *ptr)
+static struct uci_element *
+uci_lookup_ext_section(struct uci_context *ctx, struct uci_ptr *ptr)
 {
 	char *idxstr, *t, *section, *name;
 	struct uci_element *e = NULL;
@@ -314,7 +317,7 @@ static struct uci_element *uci_lookup_ext_section(struct uci_context *ctx, struc
 
 	if (!*name)
 		name = NULL;
-	else if (!uci_validate_str(name, false))
+	else if (!uci_validate_type(name))
 		goto error;
 
 	/* if the given index is negative, it specifies the section number from 
@@ -350,10 +353,25 @@ error:
 	UCI_THROW(ctx, UCI_ERR_INVAL);
 done:
 	free(section);
+	if (e)
+		ptr->section = e->name;
 	return e;
 }
 
-int uci_lookup_ptr(struct uci_context *ctx, struct uci_ptr *ptr, char *str, bool extended)
+int
+uci_lookup_next(struct uci_context *ctx, struct uci_element **e, struct uci_list *list, const char *name)
+{
+	UCI_HANDLE_ERR(ctx);
+
+	*e = uci_lookup_list(list, name);
+	if (!*e)
+		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+
+	return 0;
+}
+
+int
+uci_lookup_ptr(struct uci_context *ctx, struct uci_ptr *ptr, char *str, bool extended)
 {
 	struct uci_element *e;
 
@@ -366,28 +384,41 @@ int uci_lookup_ptr(struct uci_context *ctx, struct uci_ptr *ptr, char *str, bool
 	ptr->flags |= UCI_LOOKUP_DONE;
 
 	/* look up the package first */
-	e = uci_lookup_list(&ctx->root, ptr->package);
+	if (ptr->p)
+		e = &ptr->p->e;
+	else
+		e = uci_lookup_list(&ctx->root, ptr->package);
+
 	if (!e) {
 		UCI_INTERNAL(uci_load, ctx, ptr->package, &ptr->p);
 		if (!ptr->p)
 			goto notfound;
+		ptr->last = &ptr->p->e;
 	} else {
 		ptr->p = uci_to_package(e);
+		ptr->last = e;
 	}
 
-	if (!ptr->section)
+	if (!ptr->section && !ptr->s)
 		goto complete;
 
 	/* if the section name validates as a regular name, pass through
 	 * to the regular uci_lookup function call */
-	if (ptr->flags & UCI_LOOKUP_EXTENDED)
-		e = uci_lookup_ext_section(ctx, ptr);
-	else
+	if (ptr->s) {
+		e = &ptr->s->e;
+	} else if (ptr->flags & UCI_LOOKUP_EXTENDED) {
+		if (extended)
+			e = uci_lookup_ext_section(ctx, ptr);
+		else
+			UCI_THROW(ctx, UCI_ERR_INVAL);
+	} else {
 		e = uci_lookup_list(&ptr->p->sections, ptr->section);
+	}
 
 	if (!e)
 		goto abort;
 
+	ptr->last = e;
 	ptr->s = uci_to_section(e);
 
 	if (ptr->option) {
@@ -396,6 +427,7 @@ int uci_lookup_ptr(struct uci_context *ctx, struct uci_ptr *ptr, char *str, bool
 			goto abort;
 
 		ptr->o = uci_to_option(e);
+		ptr->last = e;
 	}
 
 complete:
@@ -408,51 +440,13 @@ notfound:
 	return 0;
 }
 
-int
-uci_fill_ptr(struct uci_context *ctx, struct uci_ptr *ptr, struct uci_element *e, bool complete)
-{
-	UCI_HANDLE_ERR(ctx);
-	UCI_ASSERT(ctx, ptr != NULL);
-	UCI_ASSERT(ctx, e != NULL);
-
-	memset(ptr, 0, sizeof(struct uci_ptr));
-	switch(e->type) {
-	case UCI_TYPE_OPTION:
-		ptr->o = uci_to_option(e);
-		goto fill_option;
-	case UCI_TYPE_SECTION:
-		ptr->s = uci_to_section(e);
-		goto fill_section;
-	case UCI_TYPE_PACKAGE:
-		ptr->p = uci_to_package(e);
-		goto fill_package;
-	default:
-		UCI_THROW(ctx, UCI_ERR_INVAL);
-	}
-
-fill_option:
-	ptr->option = ptr->o->e.name;
-	ptr->s = ptr->o->section;
-fill_section:
-	ptr->section = ptr->s->e.name;
-	ptr->p = ptr->s->package;
-fill_package:
-	ptr->package = ptr->p->e.name;
-
-	ptr->flags |= UCI_LOOKUP_DONE;
-	if (complete)
-		ptr->flags |= UCI_LOOKUP_COMPLETE;
-
-	return 0;
-}
-
-static struct uci_element *
-expand_ptr(struct uci_context *ctx, struct uci_ptr *ptr, bool complete)
+__private struct uci_element *
+uci_expand_ptr(struct uci_context *ctx, struct uci_ptr *ptr, bool complete)
 {
 	UCI_ASSERT(ctx, ptr != NULL);
 
 	if (!(ptr->flags & UCI_LOOKUP_DONE))
-		uci_lookup_ptr(ctx, ptr, NULL, 1);
+		UCI_INTERNAL(uci_lookup_ptr, ctx, ptr, NULL, 1);
 	if (complete && !(ptr->flags & UCI_LOOKUP_COMPLETE))
 		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
 	UCI_ASSERT(ctx, ptr->p != NULL);
@@ -481,140 +475,62 @@ static void uci_add_element_list(struct uci_context *ctx, struct uci_ptr *ptr, b
 	struct uci_package *p;
 
 	p = ptr->p;
-	if (!internal && p->has_history)
-		uci_add_history(ctx, &p->history, UCI_CMD_LIST_ADD, ptr->section, ptr->option, ptr->value);
+	if (!internal && p->has_delta)
+		uci_add_delta(ctx, &p->delta, UCI_CMD_LIST_ADD, ptr->section, ptr->option, ptr->value);
 
 	e = uci_alloc_generic(ctx, UCI_TYPE_ITEM, ptr->value, sizeof(struct uci_option));
 	uci_list_add(&ptr->o->v.list, &e->list);
 }
 
-int uci_set_element_value(struct uci_context *ctx, struct uci_element **element, const char *value)
-{
-	/* NB: UCI_INTERNAL use means without history tracking */
-	bool internal = ctx->internal;
-	struct uci_list *list;
-	struct uci_element *e;
-	struct uci_package *p;
-	struct uci_section *s;
-	struct uci_option *o;
-	char *section;
-	char *option;
-	char *str;
-	int size = 0;
-
-	UCI_HANDLE_ERR(ctx);
-	UCI_ASSERT(ctx, (element != NULL) && (*element != NULL));
-
-	/* what the 'value' of an element means depends on the type
-	 * for a section, the 'value' means its type
-	 * for an option, the 'value' means its value string
-	 * when changing the value, shrink the element to its actual size
-	 * (it may have been allocated with a bigger size, to include
-	 *  its buffer)
-	 * then duplicate the string passed on the command line and
-	 * insert it into the structure.
-	 */
-	e = *element;
-	list = e->list.prev;
-
-	switch(e->type) {
-	case UCI_TYPE_SECTION:
-		UCI_ASSERT(ctx, uci_validate_str(value, false));
-		size = sizeof(struct uci_section);
-		s = uci_to_section(e);
-		section = e->name;
-		option = NULL;
-		/* matches the currently set value */
-		if (!strcmp(value, s->type))
-			return 0;
-		break;
-
-	case UCI_TYPE_OPTION:
-		UCI_ASSERT(ctx, value != NULL);
-		o = uci_to_option(e);
-		s = o->section;
-		section = s->e.name;
-		option = o->e.name;
-		switch(o->type) {
-		case UCI_TYPE_STRING:
-			size = sizeof(struct uci_option);
-			/* matches the currently set value */
-			if (!strcmp(value, o->v.string))
-				return 0;
-			break;
-		default:
-			/* default action for non-string datatypes is to delete
-			 * the existing entry, then re-create it as a string */
-			break;
-		}
-		break;
-
-	default:
-		UCI_THROW(ctx, UCI_ERR_INVAL);
-		return 0;
-	}
-	p = s->package;
-	if (!internal && p->has_history)
-		uci_add_history(ctx, &p->history, UCI_CMD_CHANGE, section, option, value);
-
-	if ((e->type == UCI_TYPE_OPTION) && (size == 0)) {
-		o = uci_alloc_option(s, option, value);
-		uci_free_any(&e);
-		*element = &o->e;
-		goto done;
-	}
-
-	uci_list_del(&e->list);
-	e = uci_realloc(ctx, e, size);
-	str = uci_strdup(ctx, value);
-	uci_list_insert(list, &e->list);
-	*element = e;
-
-	switch(e->type) {
-	case UCI_TYPE_SECTION:
-		uci_to_section(e)->type = str;
-		break;
-	case UCI_TYPE_OPTION:
-		uci_to_option(e)->v.string = str;
-		break;
-	default:
-		break;
-	}
-
-done:
-	return 0;
-}
-
 int uci_rename(struct uci_context *ctx, struct uci_ptr *ptr)
 {
-	/* NB: UCI_INTERNAL use means without history tracking */
-	bool internal = ctx->internal;
+	/* NB: UCI_INTERNAL use means without delta tracking */
+	bool internal = ctx && ctx->internal;
 	struct uci_element *e;
 	struct uci_package *p;
 	char *n;
 
 	UCI_HANDLE_ERR(ctx);
 
-	e = expand_ptr(ctx, ptr, true);
+	e = uci_expand_ptr(ctx, ptr, true);
 	p = ptr->p;
 
 	UCI_ASSERT(ctx, ptr->s);
 	UCI_ASSERT(ctx, ptr->value);
 
-	if (!internal && p->has_history)
-		uci_add_history(ctx, &p->history, UCI_CMD_RENAME, ptr->section, ptr->option, ptr->value);
+	if (!internal && p->has_delta)
+		uci_add_delta(ctx, &p->delta, UCI_CMD_RENAME, ptr->section, ptr->option, ptr->value);
 
 	n = uci_strdup(ctx, ptr->value);
 	if (e->name)
 		free(e->name);
 	e->name = n;
 
+	if (e->type == UCI_TYPE_SECTION)
+		uci_to_section(e)->anonymous = false;
+
+	return 0;
+}
+
+int uci_reorder_section(struct uci_context *ctx, struct uci_section *s, int pos)
+{
+	struct uci_package *p = s->package;
+	char order[32];
+
+	UCI_HANDLE_ERR(ctx);
+
+	uci_list_set_pos(&s->package->sections, &s->e.list, pos);
+	if (!ctx->internal && p->has_delta) {
+		sprintf(order, "%d", pos);
+		uci_add_delta(ctx, &p->delta, UCI_CMD_REORDER, s->e.name, NULL, order);
+	}
+
 	return 0;
 }
 
 int uci_add_section(struct uci_context *ctx, struct uci_package *p, const char *type, struct uci_section **res)
 {
-	bool internal = ctx->internal;
+	bool internal = ctx && ctx->internal;
 	struct uci_section *s;
 
 	UCI_HANDLE_ERR(ctx);
@@ -622,8 +538,8 @@ int uci_add_section(struct uci_context *ctx, struct uci_package *p, const char *
 	s = uci_alloc_section(p, type, NULL);
 	uci_fixup_section(ctx, s);
 	*res = s;
-	if (!internal && p->has_history)
-		uci_add_history(ctx, &p->history, UCI_CMD_ADD, s->e.name, NULL, type);
+	if (!internal && p->has_delta)
+		uci_add_delta(ctx, &p->delta, UCI_CMD_ADD, s->e.name, NULL, type);
 
 	return 0;
 }
@@ -631,34 +547,40 @@ int uci_add_section(struct uci_context *ctx, struct uci_package *p, const char *
 int uci_delete(struct uci_context *ctx, struct uci_ptr *ptr)
 {
 	/* NB: pass on internal flag to uci_del_element */
-	bool internal = ctx->internal;
+	bool internal = ctx && ctx->internal;
 	struct uci_package *p;
 	struct uci_element *e;
 
 	UCI_HANDLE_ERR(ctx);
 
-	e = expand_ptr(ctx, ptr, true);
+	e = uci_expand_ptr(ctx, ptr, true);
 	p = ptr->p;
 
 	UCI_ASSERT(ctx, ptr->s);
 
-	if (!internal && p->has_history)
-		uci_add_history(ctx, &p->history, UCI_CMD_REMOVE, ptr->section, ptr->option, NULL);
+	if (!internal && p->has_delta)
+		uci_add_delta(ctx, &p->delta, UCI_CMD_REMOVE, ptr->section, ptr->option, NULL);
 
 	uci_free_any(&e);
+
+	if (ptr->option)
+		ptr->o = NULL;
+	else if (ptr->section)
+		ptr->s = NULL;
+
 	return 0;
 }
 
 int uci_add_list(struct uci_context *ctx, struct uci_ptr *ptr)
 {
-	/* NB: UCI_INTERNAL use means without history tracking */
-	bool internal = ctx->internal;
+	/* NB: UCI_INTERNAL use means without delta tracking */
+	bool internal = ctx && ctx->internal;
 	struct uci_option *prev = NULL;
 	const char *value2 = NULL;
 
 	UCI_HANDLE_ERR(ctx);
 
-	expand_ptr(ctx, ptr, false);
+	uci_expand_ptr(ctx, ptr, false);
 	UCI_ASSERT(ctx, ptr->s);
 	UCI_ASSERT(ctx, ptr->value);
 
@@ -690,85 +612,96 @@ int uci_add_list(struct uci_context *ctx, struct uci_ptr *ptr)
 	return 0;
 }
 
-int uci_set(struct uci_context *ctx, struct uci_package *p, const char *section, const char *option, const char *value, struct uci_element **result)
+int uci_del_list(struct uci_context *ctx, struct uci_ptr *ptr)
 {
-	/* NB: UCI_INTERNAL use means without history tracking */
-	bool internal = ctx->internal;
-	struct uci_element *e = NULL;
-	struct uci_section *s = NULL;
-	struct uci_option *o = NULL;
+	/* NB: pass on internal flag to uci_del_element */
+	bool internal = ctx && ctx->internal;
+	struct uci_element *e, *tmp;
+	struct uci_package *p;
 
 	UCI_HANDLE_ERR(ctx);
-	UCI_ASSERT(ctx, p != NULL);
-	UCI_ASSERT(ctx, uci_validate_name(section));
-	if (option) {
-		UCI_ASSERT(ctx, uci_validate_name(option));
-		UCI_ASSERT(ctx, value != NULL);
-	} else {
-		UCI_ASSERT(ctx, uci_validate_str(value, false));
-	}
 
-	/*
-	 * look up the package, section and option (if set)
-	 * if the section/option is to be modified and it is not found
-	 * create a new element in the appropriate list
-	 */
-	e = uci_lookup_list(&p->sections, section);
-	if (!e)
-		goto notfound;
+	uci_expand_ptr(ctx, ptr, false);
+	UCI_ASSERT(ctx, ptr->s);
+	UCI_ASSERT(ctx, ptr->value);
 
-	s = uci_to_section(e);
-	if (ctx->pctx && ctx->pctx->merge)
-		ctx->pctx->section = s;
+	if (!(ptr->o && ptr->option))
+		return 0;
 
-	if (option) {
-		e = uci_lookup_list(&s->options, option);
-		if (!e)
-			goto notfound;
-		o = uci_to_option(e);
+	if ((ptr->o->type != UCI_TYPE_LIST))
+		return 0;
+
+	p = ptr->p;
+	if (!internal && p->has_delta)
+		uci_add_delta(ctx, &p->delta, UCI_CMD_LIST_DEL, ptr->section, ptr->option, ptr->value);
+
+	uci_foreach_element_safe(&ptr->o->v.list, tmp, e) {
+		if (!strcmp(ptr->value, uci_to_option(e)->e.name)) {
+			uci_free_option(uci_to_option(e));
+		}
 	}
 
-	/* 
-	 * no unknown element was supplied, assume that we can just update 
-	 * an existing entry
-	 */
-	if (o)
-		e = &o->e;
-	else
-		e = &s->e;
-	if (result)
-		*result = e;
-	else
-		result = &e;
+	return 0;
+}
 
-	ctx->internal = internal;
-	return uci_set_element_value(ctx, result, value);
+int uci_set(struct uci_context *ctx, struct uci_ptr *ptr)
+{
+	/* NB: UCI_INTERNAL use means without delta tracking */
+	bool internal = ctx && ctx->internal;
 
-notfound:
-	/* 
-	 * the entry that we need to update was not found,
-	 * check if the search failed prematurely.
-	 * this can happen if the package was not found, or if
-	 * an option was supplied, but the section wasn't found
-	 */
-	if (!p || (!s && option))
-		UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+	UCI_HANDLE_ERR(ctx);
+	uci_expand_ptr(ctx, ptr, false);
+	UCI_ASSERT(ctx, ptr->value);
+	UCI_ASSERT(ctx, ptr->s || (!ptr->option && ptr->section));
+	if (!ptr->option && ptr->value[0]) {
+		UCI_ASSERT(ctx, uci_validate_type(ptr->value));
+	}
+
+	if (!ptr->o && ptr->s && ptr->option) {
+		struct uci_element *e;
+		e = uci_lookup_list(&ptr->s->options, ptr->option);
+		if (e)
+			ptr->o = uci_to_option(e);
+	}
+	if (!ptr->value[0]) {
+		/* if setting a nonexistant option/section to a nonexistant value,
+		 * exit without errors */
+		if (!(ptr->flags & UCI_LOOKUP_COMPLETE))
+			return 0;
 
-	/* now add the missing entry */
-	if (!internal && p->has_history)
-		uci_add_history(ctx, &p->history, UCI_CMD_CHANGE, section, option, value);
-	if (s) {
-		o = uci_alloc_option(s, option, value);
-		if (result)
-			*result = &o->e;
+		return uci_delete(ctx, ptr);
+	} else if (!ptr->o && ptr->option) { /* new option */
+		ptr->o = uci_alloc_option(ptr->s, ptr->option, ptr->value);
+		ptr->last = &ptr->o->e;
+	} else if (!ptr->s && ptr->section) { /* new section */
+		ptr->s = uci_alloc_section(ptr->p, ptr->value, ptr->section);
+		ptr->last = &ptr->s->e;
+	} else if (ptr->o && ptr->option) { /* update option */
+		if ((ptr->o->type == UCI_TYPE_STRING) &&
+			!strcmp(ptr->o->v.string, ptr->value))
+			return 0;
+		uci_free_option(ptr->o);
+		ptr->o = uci_alloc_option(ptr->s, ptr->option, ptr->value);
+		ptr->last = &ptr->o->e;
+	} else if (ptr->s && ptr->section) { /* update section */
+		char *s = uci_strdup(ctx, ptr->value);
+
+		if (ptr->s->type == uci_dataptr(ptr->s)) {
+			ptr->last = NULL;
+			ptr->last = uci_realloc(ctx, ptr->s, sizeof(struct uci_section));
+			ptr->s = uci_to_section(ptr->last);
+			uci_list_fixup(&ptr->s->e.list);
+		} else {
+			free(ptr->s->type);
+		}
+		ptr->s->type = s;
 	} else {
-		s = uci_alloc_section(p, value, section);
-		if (result)
-			*result = &s->e;
-		if (ctx->pctx && ctx->pctx->merge)
-			ctx->pctx->section = s;
+		UCI_THROW(ctx, UCI_ERR_INVAL);
 	}
 
+	if (!internal && ptr->p->has_delta)
+		uci_add_delta(ctx, &ptr->p->delta, UCI_CMD_CHANGE, ptr->section, ptr->option, ptr->value);
+
 	return 0;
 }