utils: introduce osmo_talloc_replace_string_fmt()
Change-Id: I6b84fa0525555a98c531fc558e5dc1298fec00c1
diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h
index 85a8cb3..1fdb0eb 100644
--- a/include/osmocom/core/utils.h
+++ b/include/osmocom/core/utils.h
@@ -117,6 +117,8 @@
*dst = talloc_strdup(ctx, newstr);
}
+void osmo_talloc_replace_string_fmt(void *ctx, char **dst, const char *fmt, ...);
+
/*! Append to a string and re-/allocate if necessary.
* \param[in] ctx Talloc context to use for initial allocation.
* \param[in,out] dest char* to re-/allocate and append to.
diff --git a/src/utils.c b/src/utils.c
index c180595..626dcb4 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1493,4 +1493,25 @@
return rc;
}
+/*! Replace a string using talloc and release its prior content (if any).
+ * This is a format string capable equivalent of osmo_talloc_replace_string().
+ * \param[in] ctx Talloc context to use for allocation.
+ * \param[out] dst Pointer to string, will be updated with ptr to new string.
+ * \param[in] fmt Format string that will be copied to newly allocated string. */
+void osmo_talloc_replace_string_fmt(void *ctx, char **dst, const char *fmt, ...)
+{
+ char *name = NULL;
+
+ if (fmt != NULL) {
+ va_list ap;
+
+ va_start(ap, fmt);
+ name = talloc_vasprintf(ctx, fmt, ap);
+ va_end(ap);
+ }
+
+ talloc_free(*dst);
+ *dst = name;
+}
+
/*! @} */