Add Fast LZMA2 codec

C/fast-lzma2/fl2_errors.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
+ * All rights reserved.
+ * Modified for FL2 by Conor McCarthy
+ *
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
+ * You may select, at your option, one of the above-listed licenses.
+ */
+
+#ifndef FL2_ERRORS_H_398273423
+#define FL2_ERRORS_H_398273423
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+/*===== dependency =====*/
+#include <stddef.h>   /* size_t */
+
+#include "fast-lzma2.h"
+
+/*-****************************************
+ *  error codes list
+ *  note : this API is still considered unstable
+ *         and shall not be used with a dynamic library.
+ *         only static linking is allowed
+ ******************************************/
+typedef enum {
+  FL2_error_no_error = 0,
+  FL2_error_GENERIC  = 1,
+  FL2_error_internal = 2,
+  FL2_error_corruption_detected = 3,
+  FL2_error_checksum_wrong      = 4,
+  FL2_error_parameter_unsupported   = 5,
+  FL2_error_parameter_outOfBound    = 6,
+  FL2_error_stage_wrong       = 7,
+  FL2_error_init_missing      = 8,
+  FL2_error_memory_allocation = 9,
+  FL2_error_dstSize_tooSmall = 10,
+  FL2_error_srcSize_wrong    = 11,
+  FL2_error_write_failed     = 12,
+  FL2_error_canceled         = 13,
+  FL2_error_maxCode = 20  /* never EVER use this value directly, it can change in future versions! Use FL2_isError() instead */
+} FL2_ErrorCode;
+
+/*! FL2_getErrorCode() :
+    convert a `size_t` function result into a `FL2_ErrorCode` enum type,
+    which can be used to compare with enum list published above */
+FL2LIB_API FL2_ErrorCode FL2LIB_CALL FL2_getErrorCode(size_t functionResult);
+FL2LIB_API const char* FL2LIB_CALL FL2_getErrorString(FL2_ErrorCode code);   /**< Same as FL2_getErrorName, but using a `FL2_ErrorCode` enum argument */
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* FL2_ERRORS_H_398273423 */