json_script: implement json_script_eval_string

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/json_script.h b/json_script.h
index 6c46f99..25cc04f 100644
--- a/json_script.h
+++ b/json_script.h
@@ -97,6 +97,16 @@ void json_script_free(struct json_script_ctx *ctx);
 void json_script_run(struct json_script_ctx *ctx, const char *filename,
 		     struct blob_attr *vars);
 
+/*
+ * json_script_eval_string - evaluate a string and store the result
+ *
+ * Can be used to process variable references outside of a script
+ * in a same way that they would be interpreted in the script context.
+ */
+int json_script_eval_string(struct json_script_ctx *ctx, struct blob_attr *vars,
+			    struct blob_buf *buf, const char *name,
+			    const char *pattern);
+
 struct json_script_file *
 json_script_file_from_blobmsg(const char *name, void *data, int len);