upstream/mercurial-mirror Files · mercurial/cffi/bdiff.py

diff: use fctx.isbinary() to test binary...

diff: use fctx.isbinary() to test binary The end goal is to avoid calling fctx.data() when unnecessary. For example, if diff.nobinary=1 and files are binary, the expected behavior is to print "Binary file has changed". That could avoid reading fctx.data() sometimes. This is mainly to enable an external LFS extension to skip expensive binary file loading sometimes (read: most of the time with diff.nobinary=1 and diff.text=0), without any behavior changes to mercurial (i.e. whether a file is LFS or not does not change any behavior, LFS could be 100% transparent to users).

Jun Wu - - Load All Authors

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             bdiff.py
        
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      from __future__ import absolute_import

      import cffi

      import os

      ffi = cffi.FFI()

      ffi.set_source("_bdiff_cffi",

          open(os.path.join(os.path.join(os.path.dirname(__file__), '..'),

              'bdiff.c')).read(), include_dirs=['mercurial'])

      ffi.cdef("""

      struct bdiff_line {

          int hash, n, e;

          ssize_t len;

          const char *l;

      };

      struct bdiff_hunk;

      struct bdiff_hunk {

          int a1, a2, b1, b2;

          struct bdiff_hunk *next;

      };

      int bdiff_splitlines(const char *a, ssize_t len, struct bdiff_line **lr);

      int bdiff_diff(struct bdiff_line *a, int an, struct bdiff_line *b, int bn,

          struct bdiff_hunk *base);

      void bdiff_freehunks(struct bdiff_hunk *l);

      void free(void*);

      """)

      if __name__ == '__main__':

          ffi.compile()

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				from __future__ import absolute_import

				import cffi
				import os

				ffi = cffi.FFI()
				ffi.set_source("_bdiff_cffi",
				open(os.path.join(os.path.join(os.path.dirname(__file__), '..'),
				'bdiff.c')).read(), include_dirs=['mercurial'])
				ffi.cdef("""
				struct bdiff_line {
				int hash, n, e;
				ssize_t len;
				const char *l;
				};

				struct bdiff_hunk;
				struct bdiff_hunk {
				int a1, a2, b1, b2;
				struct bdiff_hunk *next;
				};

				int bdiff_splitlines(const char a, ssize_t len, struct bdiff_line *lr);
				int bdiff_diff(struct bdiff_line a, int an, struct bdiff_line b, int bn,
				struct bdiff_hunk *base);
				void bdiff_freehunks(struct bdiff_hunk *l);
				void free(void*);
				""")

				if __name__ == '__main__':
				ffi.compile()