return ret;
}
+
+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)
+{
+ if (len <= 0)
+ return true;
+
+ if (s->pos + len >= s->len) {
+ s->len += 16;
+ s->buf = realloc(s->buf, s->len);
+ if (!s->buf)
+ return false;
+ }
+ memcpy(s->buf + s->pos, c, len);
+ s->pos += len;
+ return true;
+}
+
+static void add_separator(struct strbuf *s)
+{
+ static char indent_chars[17] = "\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
+ static const char indent_space = ' ';
+ int indent;
+ char *start;
+
+ if (!s->indent) {
+ blobmsg_puts(s, &indent_space, 1);
+ return;
+ }
+
+ indent = s->indent_level;
+ if (indent > 16)
+ indent = 16;
+
+ start = &indent_chars[sizeof(indent_chars) - indent - 1];
+ *start = '\n';
+ blobmsg_puts(s, start, indent + 1);
+ *start = '\t';
+}
+
+
+static void blobmsg_format_string(struct strbuf *s, const char *str)
+{
+ const char *p, *last = str, *end = str + strlen(str);
+ char buf[8] = "\\u00";
+
+ blobmsg_puts(s, "\"", 1);
+ for (p = str; *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 '\\':
+ case '/':
+ escape = *p;
+ break;
+ default:
+ if (*p < ' ')
+ escape = 'u';
+ break;
+ }
+
+ if (!escape)
+ continue;
+
+ if (p > last)
+ blobmsg_puts(s, last, p - last);
+ last = p + 1;
+ buf[1] = escape;
+
+ if (escape == 'u') {
+ sprintf(buf + 4, "%02x", (unsigned char) *p);
+ len = 4;
+ } else {
+ len = 2;
+ }
+ blobmsg_puts(s, buf, len);
+ }
+
+ blobmsg_puts(s, 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 array, bool head)
+{
+ const char *data_str;
+ char buf[32];
+ void *data;
+ int len;
+
+ if (!blobmsg_check_attr(attr, false))
+ return;
+
+ if (!array && blobmsg_name(attr)[0]) {
+ blobmsg_format_string(s, blobmsg_name(attr));
+ blobmsg_puts(s, ": ", 2);
+ }
+ if (head) {
+ data = blob_data(attr);
+ len = blob_len(attr);
+ } else {
+ data = blobmsg_data(attr);
+ len = blobmsg_data_len(attr);
+
+ if (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_BOOL:
+ sprintf(buf, "%s", *(uint8_t *)data ? "true" : "false");
+ break;
+ case BLOBMSG_TYPE_INT32:
+ sprintf(buf, "%d", *(uint32_t *)data);
+ break;
+ case BLOBMSG_TYPE_INT64:
+ sprintf(buf, "%lld", (long long int) *(uint64_t *)data);
+ 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;
+ int 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);
+}
+
+char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv, int indent)
+{
+ struct strbuf s;
+
+ 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;
+ }
+
+ if (list)
+ blobmsg_format_json_list(&s, blob_data(attr), blob_len(attr), false);
+ else
+ blobmsg_format_element(&s, attr, false, false);
+
+ if (!s.len)
+ return NULL;
+
+ s.buf = realloc(s.buf, s.pos + 1);
+ s.buf[s.pos] = 0;
+
+ return s.buf;
+}