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

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This commit is contained in:
Felix Fietkau 2011-02-06 16:48:28 +01:00
parent be41614060
commit 01ad5162b2
2 changed files with 29 additions and 3 deletions
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19
blobmsg.c
View file

@ -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);

13
blobmsg.h
View file

@ -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); \