ptr->next = ptr;
}
-/* inserts a new list entry between two consecutive entries */
+/* 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;
uci_list_init(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 *
uci_alloc_generic(struct uci_context *ctx, int type, const char *name, int size)
{
static void
uci_free_element(struct uci_element *e)
{
- if (!e)
- return;
-
if (!uci_list_empty(&e->list))
uci_list_del(&e->list);
free(e);
p = uci_alloc_element(ctx, package, name, 0);
p->ctx = ctx;
uci_list_init(&p->sections);
+ uci_list_init(&p->history);
return p;
}
uci_free_element(&p->e);
}
+/* record a change that was done to a package */
+static inline void
+uci_add_history(struct uci_context *ctx, struct uci_package *p, int cmd, char *section, char *option, char *value)
+{
+ struct uci_history *h = (struct uci_history *) uci_malloc(ctx, sizeof(struct uci_history));
+
+ uci_list_init(&h->list);
+ h->cmd = cmd;
+ h->section = section;
+ h->option = option;
+ h->value = value;
+ uci_list_add(&p->history, &h->list);
+}
+
+
static struct uci_element *uci_lookup_list(struct uci_context *ctx, struct uci_list *list, char *name)
{
struct uci_element *e;
return 0;
}
+int uci_set_element_value(struct uci_context *ctx, struct uci_element **element, char *value)
+{
+ int size;
+ char *str;
+ struct uci_list *list;
+ struct uci_element *e;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, value != NULL);
+ UCI_ASSERT(ctx, element != NULL);
+ UCI_ASSERT(ctx, *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:
+ size = sizeof(struct uci_section);
+ break;
+ case UCI_TYPE_OPTION:
+ size = sizeof(struct uci_option);
+ break;
+ default:
+ UCI_THROW(ctx, UCI_ERR_INVAL);
+ break;
+ }
+
+ 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 = value;
+ break;
+ case UCI_TYPE_OPTION:
+ uci_to_option(e)->value = value;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+int uci_set(struct uci_context *ctx, char *package, char *section, char *option, char *value)
+{
+ struct uci_element *e;
+ struct uci_package *p = NULL;
+ struct uci_section *s = NULL;
+ struct uci_option *o = NULL;
+ struct uci_history *h;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, package != NULL);
+ UCI_ASSERT(ctx, section != NULL);
+
+ fprintf(stderr, "uci_set: '%s' '%s' '%s' = '%s'\n", package, section, option, value);
+
+ /*
+ * 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
+ */
+ UCI_TRAP_SAVE(ctx, notfound);
+ e = uci_lookup_list(ctx, &ctx->root, package);
+ if (!e)
+ goto notfound;
+
+ p = uci_to_package(e);
+ e = uci_lookup_list(ctx, &p->sections, section);
+ if (!e)
+ goto notfound;
+ s = uci_to_section(e);
+
+ if (option) {
+ e = uci_lookup_list(ctx, &s->options, option);
+ if (!e)
+ goto notfound;
+ o = uci_to_option(e);
+ }
+ UCI_TRAP_RESTORE(ctx);
+
+ /*
+ * no unknown element was supplied, assume that we can just update
+ * an existing entry
+ */
+ if (o)
+ e = &o->e;
+ else
+ e = &s->e;
+
+ uci_add_history(ctx, p, UCI_CMD_CHANGE, section, option, value);
+ return uci_set_element_value(ctx, &e, value);
+
+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, ctx->errno);
+
+ /* now add the missing entry */
+ uci_add_history(ctx, p, UCI_CMD_ADD, section, option, value);
+ if (s)
+ uci_alloc_option(s, option, value);
+ else
+ uci_alloc_section(p, section, value);
+
+ return 0;
+}
+
int uci_unload(struct uci_context *ctx, const char *name)
{
struct uci_element *e;
return 0;
}
-
projects / project / uci.git / blobdiff