Tests: Minor cleanups to OSS-Fuzz files.

Most of these fixes are small typos and tweaks. A few were caused by bad
advice from me. Here is the summary of what is changed:

- Author line edits

- Small comment changes/additions

- Using the return value in the error messages in the fuzz targets'
  coder initialization code

- Removed fuzz_encode_stream.options. This set a max length, which may
  prevent some worthwhile code paths from being properly exercised.

- Removed the max_len option from fuzz_decode_stream.options for the
  same reason as fuzz_encode_stream. The alone decoder fuzz target still
  has this restriction.

- Altered the dictionary contents for fuzz_lzma.dict. Instead of keeping
  the properties static and varying the dictionary size, the properties
  are varied and the dictionary size is kept small. The dictionary size
  doesn't have much impact on the code paths but the properties do.

Closes: https://github.com/tukaani-project/xz/pull/73

1 files changed, 8 insertions, 8 deletions

diff --git a/tests/ossfuzz/fuzz_common.h b/tests/ossfuzz/fuzz_common.h
index ce3f9345..14742f2e 100644
--- a/tests/ossfuzz/fuzz_common.h
+++ b/tests/ossfuzz/fuzz_common.h
@@ -1,9 +1,10 @@
 ///////////////////////////////////////////////////////////////////////////////
 //
-/// \file       fuzz_decode_auto.c
-/// \brief      Fuzz test program for liblzma lzma_auto_decoder()
+/// \file       fuzz_common.h
+/// \brief      Common macros and functions needed by the fuzz targets
 //
-//  Author:     Maksym Vatsyk
+//  Authors:    Maksym Vatsyk
+//              Lasse Collin
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
@@ -21,13 +22,12 @@
 #define MEM_LIMIT (300 << 20) // 300 MiB
 
 
-// Output buffer for decompressed data. This is write only; nothing cares
-// about the actual data written here.
-static uint8_t outbuf[4096];
-
-
 static void
 fuzz_code(lzma_stream *stream, const uint8_t *inbuf, size_t inbuf_size) {
+	// Output buffer for decompressed data. This is write only; nothing
+	// cares about the actual data written here.
+	uint8_t outbuf[4096];
+
 	// Give the whole input buffer at once to liblzma.
 	// Output buffer isn't initialized as liblzma only writes to it.
 	stream->next_in = inbuf;