add a callback to the blobmsg-to-json function to override the formatting of specific...

diff --git a/blobmsg.c b/blobmsg.c
index a77f1582ab823f720c0c11667fe7faa307581b7f..26604b1be6d9c0c6fb5bef34cb5bc5ce6c13826c 100644 (file)
--- a/blobmsg.c
+++ b/blobmsg.c
@@ -19,6 +19,9 @@ struct strbuf {
        int len;
        int pos;
        char *buf;
+
+       blobmsg_json_format_t custom_format;
+       void *priv;
 };
 
 static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
@@ -96,6 +99,7 @@ static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, i
 
 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;
@@ -110,8 +114,15 @@ static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, boo
        } 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_INT8:
                sprintf(buf, "%d", *(uint8_t *)data);
@@ -135,7 +146,9 @@ static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, boo
                blobmsg_format_json_list(s, data, len, false);
                return;
        }
-       blobmsg_puts(s, buf, strlen(buf));
+
+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)
@@ -155,13 +168,15 @@ static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, i
        blobmsg_puts(s, (array ? " ]" : " }"), 2);
 }
 
-char *blobmsg_format_json(struct blob_attr *attr, bool list)
+char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv)
 {
        struct strbuf s;
 
        s.len = blob_len(attr);
        s.buf = malloc(s.len);
        s.pos = 0;
+       s.custom_format = cb;
+       s.priv = priv;
 
        if (list)
                blobmsg_format_json_list(&s, blob_data(attr), blob_len(attr), false);

diff --git a/blobmsg.h b/blobmsg.h
index e51c39d662bb4173437deb231cdc85a9e55471f7..728f9e3e1d895f5b8d7bbb6d264f477a94433923 100644 (file)
--- a/blobmsg.h
+++ b/blobmsg.h
@@ -162,7 +162,18 @@ static inline uint64_t blobmsg_get_u64(struct blob_attr *attr)
 void *blobmsg_alloc_string_buffer(struct blob_buf *buf, const char *name, int maxlen);
 void blobmsg_add_string_buffer(struct blob_buf *buf);
 
-char *blobmsg_format_json(struct blob_attr *attr, bool list);
+/* blobmsg to json formatting */
+
+typedef const char *(*blobmsg_json_format_t)(void *priv, struct blob_attr *attr);
+
+char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list,
+                                 blobmsg_json_format_t cb, void *priv);
+
+static inline char *blobmsg_format_json(struct blob_attr *attr, bool list)
+{
+       return blobmsg_format_json_with_cb(attr, list, NULL, NULL);
+}
+
 
 #define blobmsg_for_each_attr(pos, attr, rem) \
        for (rem = blobmsg_data_len(attr), pos = blobmsg_data(attr); \