replace all calls to sprintf with a format helper that advances a cursor. Also convert the meta-formatter (i.e. results printer) to this scheme

1 files changed, 21 insertions, 0 deletions

diff --git a/ot_fmt.h b/ot_fmt.h
new file mode 100644
index 0000000..851b2d8
--- /dev/null
+++ b/ot_fmt.h
@@ -0,0 +1,21 @@
+/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
+   It is considered beerware. Prost. Skol. Cheers or whatever.
+
+   $id$ */
+
+#ifndef OT_FMT_H__
+#define OT_FMT_H__
+
+#include <stddef.h>
+
+/* Appending to a cursor that walks a fixed buffer. Both take the cursor by
+   reference and advance it, so a reply is written as a run of statements and
+   no caller does pointer arithmetic of its own. */
+
+void fmt_append(char **cursor, const char *end, const char *format, ...) __attribute__((format(printf, 3, 4)));
+
+/* Append raw bytes for the binary stretches of a bencoded reply.
+   Either everything is appended or nothing at all */
+void fmt_bytes(char **cursor, const char *end, const void *bytes, size_t length);
+
+#endif