Import of the watch repository from Pebble

third_party/nanopb/tests/fuzztest/random_data.h

@@ -0,0 +1,44 @@
+/* This module handles generating & modifying messages randomly for the fuzz test. */
+
+#ifndef RANDOM_DATA_H
+#define RANDOM_DATA_H
+
+#include <pb.h>
+
+void random_set_seed(uint32_t seed);
+uint32_t random_get_seed();
+
+/* Random 32-bit integer */
+uint32_t rand_word();
+
+/* Get a random integer in range, with approximately flat distribution. */
+int rand_int(int min, int max);
+
+/* Random boolean, equal probability */
+bool rand_bool();
+
+/* Get a random byte, with skewed distribution.
+ * Important corner cases like 0xFF, 0x00 and 0xFE occur more
+ * often than other values. */
+uint8_t rand_byte();
+
+/* Get a random length, with skewed distribution.
+ * Favors the shorter lengths, but always at least 1. */
+size_t rand_len(size_t max);
+
+/* Fills a buffer with random bytes with skewed distribution. */
+void rand_fill(uint8_t *buf, size_t count);
+
+/* Fill with random protobuf-like data */
+size_t rand_fill_protobuf(uint8_t *buf, size_t min_bytes, size_t max_bytes, int min_tag);
+
+/* Given a buffer of data, mess it up a bit by copying / swapping bytes */
+void rand_mess(uint8_t *buf, size_t count);
+
+/* Append or prepend protobuf noise, with tag values > 1000 */
+void rand_protobuf_noise(uint8_t *buffer, size_t bufsize, size_t *msglen);
+
+
+
+
+#endif