tal/str: add tal_append_fmt() and tal_append_vfmt() helpers.

[ccan] / ccan / tal / str / str.h

diff --git a/ccan/tal/str/str.h b/ccan/tal/str/str.h
index 4a6c474a4428a3e79998d1168b09e8c28d2f57a9..f2a694896c6aa89deed462278a70c7aa41307e32 100644 (file)
--- a/ccan/tal/str/str.h
+++ b/ccan/tal/str/str.h
@@ -39,6 +39,25 @@ char *tal_fmt(const tal_t *ctx, const char *fmt, ...) PRINTF_FMT(2,3);
 char *tal_vfmt(const tal_t *ctx, const char *fmt, va_list ap)
        PRINTF_FMT(2,0);
 
+/**
+ * tal_append_fmt - append a formatted string to a talloc string.
+ * @baseptr: a pointer to the tal string to be appended to.
+ * @fmt: the printf-style format (can be take()).
+ *
+ * Returns false on allocation failure.
+ */
+bool tal_append_fmt(char **baseptr, const char *fmt, ...) PRINTF_FMT(2,3);
+
+/**
+ * tal_append_vfmt - append a formatted string to a talloc string (va_list)
+ * @baseptr: a pointer to the tal string to be appended to.
+ * @fmt: the printf-style format (can be take()).
+ * @va: the va_list containing the format args.
+ *
+ * Returns false on allocation failure.
+ */
+bool tal_append_vfmt(char **baseptr, const char *fmt, va_list ap);
+
 /**
  * tal_strcat - join two strings together
  * @ctx: NULL, or tal allocated object to be parent.