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@@ -0,0 +1,211 @@
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+/*
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+ * blob.c - uci <-> blobmsg conversion layer
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+ * Copyright (C) 2012-2013 Felix Fietkau <nbd@openwrt.org>
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+ *
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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 Lesser General Public License version 2.1
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+ * as published by the Free Software Foundation
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+ *
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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 Lesser General Public License for more details.
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+ */
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+#include <string.h>
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+#include <stdlib.h>
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+#include <stdio.h>
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+
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+#include <libubox/blobmsg.h>
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+#include "uci.h"
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+#include "uci_blob.h"
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+
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+static bool
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+uci_attr_to_blob(struct blob_buf *b, const char *str,
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+ const char *name, enum blobmsg_type type)
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+{
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+ char *err;
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+ int intval;
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+
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+ switch (type) {
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+ case BLOBMSG_TYPE_STRING:
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+ blobmsg_add_string(b, name, str);
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+ break;
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+ case BLOBMSG_TYPE_BOOL:
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+ if (!strcmp(str, "true") || !strcmp(str, "1"))
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+ intval = 1;
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+ else if (!strcmp(str, "false") || !strcmp(str, "0"))
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+ intval = 0;
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+ else
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+ return false;
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+
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+ blobmsg_add_u8(b, name, intval);
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+ break;
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+ case BLOBMSG_TYPE_INT32:
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+ intval = strtol(str, &err, 0);
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+ if (*err)
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+ return false;
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+
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+ blobmsg_add_u32(b, name, intval);
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+ break;
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+ default:
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+ return false;
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+ }
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+ return true;
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+}
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+
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+static void
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+uci_array_to_blob(struct blob_buf *b, struct uci_option *o,
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+ enum blobmsg_type type)
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+{
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+ struct uci_element *e;
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+ char *str, *next, *word;
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+
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+ if (o->type == UCI_TYPE_LIST) {
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+ uci_foreach_element(&o->v.list, e) {
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+ uci_attr_to_blob(b, e->name, NULL, type);
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+ }
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+ return;
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+ }
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+
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+ str = strdup(o->v.string);
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+ next = str;
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+
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+ while ((word = strsep(&next, " \t")) != NULL) {
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+ if (!*word)
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+ continue;
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+
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+ uci_attr_to_blob(b, word, NULL, type);
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+ }
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+
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+ free(str);
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+}
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+
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+static int
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+__uci_to_blob(struct blob_buf *b, struct uci_section *s,
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+ const struct uci_blob_param_list *p)
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+{
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+ const struct blobmsg_policy *attr = NULL;
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+ struct uci_element *e;
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+ struct uci_option *o;
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+ void *array;
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+ int i, ret = 0;
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+
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+ uci_foreach_element(&s->options, e) {
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+ for (i = 0; i < p->n_params; i++) {
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+ attr = &p->params[i];
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+ if (!strcmp(attr->name, e->name))
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+ break;
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+ }
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+
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+ if (i == p->n_params)
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+ continue;
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+
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+ o = uci_to_option(e);
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+
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+ if (attr->type == BLOBMSG_TYPE_ARRAY) {
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+ if (!p->info)
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+ continue;
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+
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+ array = blobmsg_open_array(b, attr->name);
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+ uci_array_to_blob(b, o, p->info[i].type);
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+ blobmsg_close_array(b, array);
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+ ret++;
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+ continue;
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+ }
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+
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+ if (o->type == UCI_TYPE_LIST)
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+ continue;
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+
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+ ret += uci_attr_to_blob(b, o->v.string, attr->name, attr->type);
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+ }
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+
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+ return ret;
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+}
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+
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+int
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+uci_to_blob(struct blob_buf *b, struct uci_section *s,
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+ const struct uci_blob_param_list *p)
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+{
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+ int ret = 0;
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+ int i;
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+
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+ ret += __uci_to_blob(b, s, p);
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+ for (i = 0; i < p->n_next; i++)
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+ ret += uci_to_blob(b, s, p->next[i]);
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+
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+ return ret;
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+}
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+
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+bool
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+uci_blob_diff(struct blob_attr **tb1, struct blob_attr **tb2,
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+ const struct uci_blob_param_list *config, unsigned long *diff)
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+{
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+ bool ret = false;
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+ int i;
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+
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+ for (i = 0; i < config->n_params; i++) {
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+ if (!tb1[i] && !tb2[i])
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+ continue;
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+
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+ if (!!tb1[i] != !!tb2[i])
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+ goto mark;
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+
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+ if (blob_len(tb1[i]) != blob_len(tb2[i]))
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+ goto mark;
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+
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+ if (memcmp(tb1[i], tb2[i], blob_raw_len(tb1[i])) != 0)
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+ goto mark;
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+
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+ continue;
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+
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+mark:
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+ ret = true;
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+ if (diff)
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+ bitfield_set(diff, i);
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+ else
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+ return ret;
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+ }
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+
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+ return ret;
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+}
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+
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+
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+static bool
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+__uci_blob_check_equal(struct blob_attr *c1, struct blob_attr *c2,
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+ const struct uci_blob_param_list *config)
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+{
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+ struct blob_attr **tb1, **tb2;
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+
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+ if (!!c1 ^ !!c2)
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+ return false;
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+
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+ if (!c1 && !c2)
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+ return true;
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+
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+ tb1 = alloca(config->n_params * sizeof(struct blob_attr *));
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+ blobmsg_parse(config->params, config->n_params, tb1,
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+ blob_data(c1), blob_len(c1));
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+
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+ tb2 = alloca(config->n_params * sizeof(struct blob_attr *));
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+ blobmsg_parse(config->params, config->n_params, tb2,
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+ blob_data(c2), blob_len(c2));
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+
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+ return !uci_blob_diff(tb1, tb2, config, NULL);
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+}
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+
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+bool
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+uci_blob_check_equal(struct blob_attr *c1, struct blob_attr *c2,
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+ const struct uci_blob_param_list *config)
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+{
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+ int i;
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+
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+ if (!__uci_blob_check_equal(c1, c2, config))
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+ return false;
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+
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+ for (i = 0; i < config->n_next; i++) {
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+ if (!__uci_blob_check_equal(c1, c2, config->next[i]))
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+ return false;
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+ }
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+
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+ return true;
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+}
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