upstream/mercurial-mirror Files · contrib/chg/util.h

changegroup: refactor delta parent code...

changegroup: refactor delta parent code We had recently abstracted the delta parent functions to facilitate extracting code from cgpacker. Now that we're in a better place, it is time to revisit the design. Changegroup version 1 requires that the previous node be used as the delta parent. Later versions allow any available node to be used as the base. In the case where an arbitrary parent can be used, the choice of a delta parent is best left in the hands of the storage backend. So it makes sense for the delta parent selection to be hidden away in the storage layer. This means deferring the choice of the delta parent selection function to as close to delta generation time as possible. This commit moves the delta selection logic to essentially just before delta generation. However, because changegroup version 1 limits what we can do, we have retained the ability to force a delta against the previous revision. As part of this, I realized that the ellipsis parent function was unused! That's because ellipsis mode always sends full revisions and not deltas. Differential Revision: https://phab.mercurial-scm.org/D4214

Augie Fackler - - Load All Authors

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      /*

       * Utility functions

       *

       * Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org>

       *

       * This software may be used and distributed according to the terms of the

       * GNU General Public License version 2 or any later version.

       */

      #ifndef UTIL_H_

      #define UTIL_H_

      #ifdef __GNUC__

      #define PRINTF_FORMAT_ __attribute__((format(printf, 1, 2)))

      #define UNUSED_ __attribute__((unused))

      #else

      #define PRINTF_FORMAT_

      #define UNUSED_

      #endif

      void abortmsg(const char *fmt, ...) PRINTF_FORMAT_;

      void abortmsgerrno(const char *fmt, ...) PRINTF_FORMAT_;

      void enablecolor(void);

      void enabledebugmsg(void);

      void debugmsg(const char *fmt, ...) PRINTF_FORMAT_;

      void fchdirx(int dirfd);

      void fsetcloexec(int fd);

      void *mallocx(size_t size);

      void *reallocx(void *ptr, size_t size);

      int runshellcmd(const char *cmd, const char *envp[], const char *cwd);

      #endif /* UTIL_H_ */

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				/*
				* Utility functions
				*
				* Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org>
				*
				* This software may be used and distributed according to the terms of the
				* GNU General Public License version 2 or any later version.
				*/

				#ifndef UTIL_H_
				#define UTIL_H_

				#ifdef __GNUC__
				#define PRINTF_FORMAT_ __attribute__((format(printf, 1, 2)))
				#define UNUSED_ __attribute__((unused))
				#else
				#define PRINTF_FORMAT_
				#define UNUSED_
				#endif

				void abortmsg(const char *fmt, ...) PRINTF_FORMAT_;
				void abortmsgerrno(const char *fmt, ...) PRINTF_FORMAT_;

				void enablecolor(void);
				void enabledebugmsg(void);
				void debugmsg(const char *fmt, ...) PRINTF_FORMAT_;

				void fchdirx(int dirfd);
				void fsetcloexec(int fd);
				void *mallocx(size_t size);
				void reallocx(void ptr, size_t size);

				int runshellcmd(const char cmd, const char envp[], const char *cwd);

				#endif /* UTIL_H_ */