make blob attribute checking available externally

diff --git a/blob.c b/blob.c
index 3bd69fac04d43043172b7bd6032dc9529974c049..cafd74cfa5d0c04eac984dee0ee92c55c3489ed8 100644 (file)
--- a/blob.c
+++ b/blob.c
@@ -131,6 +131,28 @@ static const int blob_type_minlen[BLOB_ATTR_LAST] = {
        [BLOB_ATTR_INT64] = sizeof(uint64_t),
 };
 
+bool
+blob_check_type(void *ptr, int len, int type)
+{
+       char *data = ptr;
+
+       if (type >= BLOB_ATTR_LAST)
+               return false;
+
+       if (type >= BLOB_ATTR_INT8 && type <= BLOB_ATTR_INT64) {
+               if (len != blob_type_minlen[type])
+                       return false;
+       } else {
+               if (len < blob_type_minlen[type])
+                       return false;
+       }
+
+       if (type == BLOB_ATTR_STRING && data[len] != 0)
+               return false;
+
+       return true;
+}
+
 int
 blob_parse(struct blob_attr *attr, struct blob_attr **data, const struct blob_attr_info *info, int max)
 {
@@ -142,27 +164,18 @@ blob_parse(struct blob_attr *attr, struct blob_attr **data, const struct blob_at
        blob_for_each_attr(pos, attr, rem) {
                int id = blob_id(pos);
                int len = blob_len(pos);
-               char *pdata;
 
                if (id >= max)
                        continue;
 
                if (info) {
                        int type = info[id].type;
+
                        if (type < BLOB_ATTR_LAST) {
-                               if (type >= BLOB_ATTR_INT8 && type <= BLOB_ATTR_INT64) {
-                                       if (len != blob_type_minlen[type])
-                                               continue;
-                               } else {
-                                       if (len < blob_type_minlen[type])
-                                               continue;
-                               }
+                               if (!blob_check_type(blob_data(pos), len, type))
+                                       continue;
                        }
 
-                       pdata = blob_data(pos);
-                       if (type == BLOB_ATTR_STRING && pdata[len] != 0)
-                               continue;
-
                        if (info[id].minlen && len < info[id].minlen)
                                continue;
 

diff --git a/blob.h b/blob.h
index a7afdcb26b5cec14be8297b736eee6b5d25549df..7d7509c288f0970f9eaa6baa24ea4148e08d1874 100644 (file)
--- a/blob.h
+++ b/blob.h
@@ -218,6 +218,7 @@ extern struct blob_attr *blob_new(struct blob_buf *buf, int id, int payload);
 extern void *blob_nest_start(struct blob_buf *buf, int id);
 extern void blob_nest_end(struct blob_buf *buf, void *cookie);
 extern struct blob_attr *blob_put(struct blob_buf *buf, int id, const void *ptr, int len);
+extern bool blob_check_type(void *ptr, int len, int type);
 extern int blob_parse(struct blob_attr *attr, struct blob_attr **data, const struct blob_attr_info *info, int max);
 
 static inline struct blob_attr *