upstream/mercurial-mirror Files · contrib/python-zstandard/zstd/common/error_private.h

manifest: delay import of `typing.ByteString` for py 3.14 support (issue6940)...

manifest: delay import of `typing.ByteString` for py 3.14 support (issue6940) Since Python 2.7 and 3.5, `typing.ByteString` was defined as an alias for `bytes | bytearray | memoryview`, and `bytes` was also accepted as a shorthand for this, so we have `bytes` sprinkled all over the codebase. But then PEP-688 reversed all of that by deprecating `typing.ByteString` and its successor `collections.abc.ByteString` in Python 3.12 (as well as the `bytes` shorthand)[1], and removing it completely in Python 3.14. That leaves us with a couple of problems, namely defining something useful that spans py3.8-py3.13 and keeps pytype happy, and finding all of the instances where `bytes` doesn't really mean `bytes`. The current successor to all of this is `collections.abc.Buffer` in Python 3.12 (or `typing_extensions.Buffer` in previous versions). However, the current CI does type checking using Python 3.11 (so the former is not avaiable), and pytype has issues with importing `typing_extensions.Buffer`[2]. The good news is we don't need to deal with this mess immediately, since the type annotation evaluation is delayed to the type checking phase, and we're making no effort at supporting it in all supported versions of Python. So by delaying the import of this particular symbol, we can still use it for type checking purposes, but can start assessing Python 3.14 problems without doing a lot of extra work. Putting this on stable will allow people interested in 3.14 to work on it 4-5 extra months earlier (and apparently there's some interest). [1] https://peps.python.org/pep-0688/#no-special-meaning-for-bytes [2] https://github.com/google/pytype/issues/1772

Gregory Szorc - - Load All Authors

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      /*

       * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.

       * All rights reserved.

       *

       * 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.

       */

      /* Note : this module is expected to remain private, do not expose it */

      #ifndef ERROR_H_MODULE

      #define ERROR_H_MODULE

      #if defined (__cplusplus)

      extern "C" {

      #endif

      /* ****************************************

      *  Dependencies

      ******************************************/

      #include <stddef.h>        /* size_t */

      #include "zstd_errors.h"  /* enum list */

      /* ****************************************

      *  Compiler-specific

      ******************************************/

      #if defined(__GNUC__)

      #  define ERR_STATIC static __attribute__((unused))

      #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)

      #  define ERR_STATIC static inline

      #elif defined(_MSC_VER)

      #  define ERR_STATIC static __inline

      #else

      #  define ERR_STATIC static  /* this version may generate warnings for unused static functions; disable the relevant warning */

      #endif

      /*-****************************************

      *  Customization (error_public.h)

      ******************************************/

      typedef ZSTD_ErrorCode ERR_enum;

      #define PREFIX(name) ZSTD_error_##name

      /*-****************************************

      *  Error codes handling

      ******************************************/

      #undef ERROR   /* reported already defined on VS 2015 (Rich Geldreich) */

      #define ERROR(name) ZSTD_ERROR(name)

      #define ZSTD_ERROR(name) ((size_t)-PREFIX(name))

      ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }

      ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }

      /*-****************************************

      *  Error Strings

      ******************************************/

      const char* ERR_getErrorString(ERR_enum code);   /* error_private.c */

      ERR_STATIC const char* ERR_getErrorName(size_t code)

      {

          return ERR_getErrorString(ERR_getErrorCode(code));

      }

      #if defined (__cplusplus)

      }

      #endif

      #endif /* ERROR_H_MODULE */

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				/*
				* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
				* All rights reserved.
				*
				* 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.
				*/

				/* Note : this module is expected to remain private, do not expose it */

				#ifndef ERROR_H_MODULE
				#define ERROR_H_MODULE

				#if defined (__cplusplus)
				extern "C" {
				#endif


				/* ****************************************
				* Dependencies
				******************************************/
				#include <stddef.h> /* size_t */
				#include "zstd_errors.h" /* enum list */


				/* ****************************************
				* Compiler-specific
				******************************************/
				#if defined(__GNUC__)
				# define ERR_STATIC static __attribute__((unused))
				#elif defined (__cplusplus) \|\| (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
				# define ERR_STATIC static inline
				#elif defined(_MSC_VER)
				# define ERR_STATIC static __inline
				#else
				# define ERR_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
				#endif


				/-***************************************
				* Customization (error_public.h)
				******************************************/
				typedef ZSTD_ErrorCode ERR_enum;
				#define PREFIX(name) ZSTD_error_##name


				/-***************************************
				* Error codes handling
				******************************************/
				#undef ERROR /* reported already defined on VS 2015 (Rich Geldreich) */
				#define ERROR(name) ZSTD_ERROR(name)
				#define ZSTD_ERROR(name) ((size_t)-PREFIX(name))

				ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }

				ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }


				/-***************************************
				* Error Strings
				******************************************/

				const char* ERR_getErrorString(ERR_enum code); /* error_private.c */

				ERR_STATIC const char* ERR_getErrorName(size_t code)
				{
				return ERR_getErrorString(ERR_getErrorCode(code));
				}

				#if defined (__cplusplus)
				}
				#endif

				#endif /* ERROR_H_MODULE */