+bool blobmsg_add_json_from_file(struct blob_buf *b, const char *file)
+{
+ return __blobmsg_add_json(b, json_object_from_file(file));
+}
+
+bool blobmsg_add_json_from_string(struct blob_buf *b, const char *str)
+{
+ return __blobmsg_add_json(b, json_tokener_parse(str));
+}
+
+
+struct strbuf {
+ int len;
+ int pos;
+ char *buf;
+
+ blobmsg_json_format_t custom_format;
+ void *priv;
+ bool indent;
+ int indent_level;
+};
+
+static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
+{
+ size_t new_len;
+ char *new_buf;
+
+ if (len <= 0)
+ return true;
+
+ if (s->pos + len >= s->len) {
+ new_len = s->len + 16 + len;
+ new_buf = realloc(s->buf, new_len);
+ if (!new_buf)
+ return false;
+
+ s->len = new_len;
+ s->buf = new_buf;
+ }
+
+ memcpy(s->buf + s->pos, c, len);
+ s->pos += len;
+ return true;
+}
+
+static void add_separator(struct strbuf *s)
+{
+ const char indent_chars[] = "\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
+ size_t len;
+
+ if (!s->indent)
+ return;
+
+ len = s->indent_level + 1;
+ if (len > sizeof(indent_chars) - 1)
+ len = sizeof(indent_chars) - 1;
+
+ blobmsg_puts(s, indent_chars, len);
+}
+
+
+static void blobmsg_format_string(struct strbuf *s, const char *str)
+{
+ const unsigned char *p, *last, *end;
+ char buf[8] = "\\u00";
+
+ end = (unsigned char *) str + strlen(str);
+ blobmsg_puts(s, "\"", 1);
+ for (p = (unsigned char *) str, last = p; *p; p++) {
+ char escape = '\0';
+ int len;
+
+ switch(*p) {
+ case '\b':
+ escape = 'b';
+ break;
+ case '\n':
+ escape = 'n';
+ break;
+ case '\t':
+ escape = 't';
+ break;
+ case '\r':
+ escape = 'r';
+ break;
+ case '"':
+ case '\\':
+ escape = *p;
+ break;
+ default:
+ if (*p < ' ')
+ escape = 'u';
+ break;
+ }
+
+ if (!escape)
+ continue;
+
+ if (p > last)
+ blobmsg_puts(s, (char *) last, p - last);
+ last = p + 1;
+ buf[1] = escape;
+
+ if (escape == 'u') {
+ snprintf(buf + 4, sizeof(buf) - 4, "%02x", (unsigned char) *p);
+ len = 6;
+ } else {
+ len = 2;
+ }
+ blobmsg_puts(s, buf, len);
+ }
+
+ blobmsg_puts(s, (char *) last, end - last);
+ blobmsg_puts(s, "\"", 1);
+}
+
+static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
+
+static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool without_name, bool head)
+{
+ const char *data_str;
+ char buf[317];
+ void *data;
+ int len;
+
+ if (!blobmsg_check_attr(attr, false))
+ return;
+
+ if (!without_name && blobmsg_name(attr)[0]) {
+ blobmsg_format_string(s, blobmsg_name(attr));
+ blobmsg_puts(s, ": ", s->indent ? 2 : 1);
+ }
+
+ data = blobmsg_data(attr);
+ len = blobmsg_data_len(attr);
+
+ if (!head && s->custom_format) {
+ data_str = s->custom_format(s->priv, attr);
+ if (data_str)
+ goto out;
+ }
+
+ data_str = buf;
+ switch(blob_id(attr)) {
+ case BLOBMSG_TYPE_UNSPEC:
+ snprintf(buf, sizeof(buf), "null");
+ break;
+ case BLOBMSG_TYPE_BOOL:
+ snprintf(buf, sizeof(buf), "%s", *(uint8_t *)data ? "true" : "false");
+ break;
+ case BLOBMSG_TYPE_INT16:
+ snprintf(buf, sizeof(buf), "%" PRId16, (int16_t) be16_to_cpu(*(uint16_t *)data));
+ break;
+ case BLOBMSG_TYPE_INT32:
+ snprintf(buf, sizeof(buf), "%" PRId32, (int32_t) be32_to_cpu(*(uint32_t *)data));
+ break;
+ case BLOBMSG_TYPE_INT64:
+ snprintf(buf, sizeof(buf), "%" PRId64, (int64_t) be64_to_cpu(*(uint64_t *)data));
+ break;
+ case BLOBMSG_TYPE_DOUBLE:
+ snprintf(buf, sizeof(buf), "%lf", blobmsg_get_double(attr));
+ break;
+ case BLOBMSG_TYPE_STRING:
+ blobmsg_format_string(s, data);
+ return;
+ case BLOBMSG_TYPE_ARRAY:
+ blobmsg_format_json_list(s, data, len, true);
+ return;
+ case BLOBMSG_TYPE_TABLE:
+ blobmsg_format_json_list(s, data, len, false);
+ return;
+ }
+
+out:
+ blobmsg_puts(s, data_str, strlen(data_str));
+}
+
+static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
+{
+ struct blob_attr *pos;
+ bool first = true;
+ size_t rem = len;
+
+ blobmsg_puts(s, (array ? "[" : "{" ), 1);
+ s->indent_level++;
+ add_separator(s);
+ __blob_for_each_attr(pos, attr, rem) {
+ if (!first) {
+ blobmsg_puts(s, ",", 1);
+ add_separator(s);
+ }
+
+ blobmsg_format_element(s, pos, array, false);
+ first = false;
+ }
+ s->indent_level--;
+ add_separator(s);
+ blobmsg_puts(s, (array ? "]" : "}"), 1);
+}
+
+static void setup_strbuf(struct strbuf *s, struct blob_attr *attr, blobmsg_json_format_t cb, void *priv, int indent)
+{
+ s->len = blob_len(attr);
+ s->buf = malloc(s->len);
+ s->pos = 0;
+ s->custom_format = cb;
+ s->priv = priv;
+ s->indent = false;
+
+ if (indent >= 0) {
+ s->indent = true;
+ s->indent_level = indent;
+ }
+}
+
+char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv, int indent)
+{
+ struct strbuf s = {0};
+ bool array;
+ char *ret;
+
+ setup_strbuf(&s, attr, cb, priv, indent);
+ if (!s.buf)
+ return NULL;
+
+ array = blob_is_extended(attr) &&
+ blobmsg_type(attr) == BLOBMSG_TYPE_ARRAY;
+
+ if (list)
+ blobmsg_format_json_list(&s, blobmsg_data(attr), blobmsg_data_len(attr), array);
+ else
+ blobmsg_format_element(&s, attr, false, false);
+
+ if (!s.len) {
+ free(s.buf);
+ return NULL;
+ }
+
+ ret = realloc(s.buf, s.pos + 1);
+ if (!ret) {
+ free(s.buf);
+ return NULL;
+ }
+
+ ret[s.pos] = 0;
+
+ return ret;
+}
+
+char *blobmsg_format_json_value_with_cb(struct blob_attr *attr, blobmsg_json_format_t cb, void *priv, int indent)
+{
+ struct strbuf s = {0};
+ char *ret;
+
+ setup_strbuf(&s, attr, cb, priv, indent);
+ if (!s.buf)
+ return NULL;
+
+ blobmsg_format_element(&s, attr, true, false);
+
+ if (!s.len) {
+ free(s.buf);
+ return NULL;
+ }
+
+ ret = realloc(s.buf, s.pos + 1);
+ if (!ret) {
+ free(s.buf);
+ return NULL;
+ }
+
+ ret[s.pos] = 0;
+
+ return ret;
+}