cpython/Include/internal/pycore_pyhash.h

#ifndef Py_INTERNAL_HASH_H
#define Py_INTERNAL_HASH_H

#if !defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_BUILTIN)
#  error "this header requires Py_BUILD_CORE or Py_BUILD_CORE_BUILTIN define"
#endif

uint64_t _Py_KeyedHash(uint64_t, const char *, Py_ssize_t);

#endif
closes bpo-31650: PEP 552 (Deterministic pycs) implementation (#4575) Python now supports checking bytecode cache up-to-dateness with a hash of the source contents rather than volatile source metadata. See the PEP for details. While a fairly straightforward idea, quite a lot of code had to be modified due to the pervasiveness of pyc implementation details in the codebase. Changes in this commit include: - The core changes to importlib to understand how to read, validate, and regenerate hash-based pycs. - Support for generating hash-based pycs in py_compile and compileall. - Modifications to our siphash implementation to support passing a custom key. We then expose it to importlib through _imp. - Updates to all places in the interpreter, standard library, and tests that manually generate or parse pyc files to grok the new format. - Support in the interpreter command line code for long options like --check-hash-based-pycs. - Tests and documentation for all of the above. 2017-12-09 14:26:52 -04:00			`#ifndef Py_INTERNAL_HASH_H`
			`#define Py_INTERNAL_HASH_H`

bpo-35081: Internal headers require Py_BUILD_CORE (GH-10363) * All internal header files now require Py_BUILD_CORE or Py_BUILD_CORE_BUILTIN to be defined. * _json.c is now compiled with Py_BUILD_CORE_BUILTIN to access pycore_accu.h header. * Add an example to Modules/Setup to show how to build _json as a built-in module; it requires non trivial compiler options. 2018-11-09 08:03:37 -04:00			`#if !defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_BUILTIN)`
			`# error "this header requires Py_BUILD_CORE or Py_BUILD_CORE_BUILTIN define"`
			`#endif`

closes bpo-31650: PEP 552 (Deterministic pycs) implementation (#4575) Python now supports checking bytecode cache up-to-dateness with a hash of the source contents rather than volatile source metadata. See the PEP for details. While a fairly straightforward idea, quite a lot of code had to be modified due to the pervasiveness of pyc implementation details in the codebase. Changes in this commit include: - The core changes to importlib to understand how to read, validate, and regenerate hash-based pycs. - Support for generating hash-based pycs in py_compile and compileall. - Modifications to our siphash implementation to support passing a custom key. We then expose it to importlib through _imp. - Updates to all places in the interpreter, standard library, and tests that manually generate or parse pyc files to grok the new format. - Support in the interpreter command line code for long options like --check-hash-based-pycs. - Tests and documentation for all of the above. 2017-12-09 14:26:52 -04:00			`uint64_t _Py_KeyedHash(uint64_t, const char *, Py_ssize_t);`

			`#endif`