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

minirst: dynamically compile admonitions regexp...

minirst: dynamically compile admonitions regexp Currently, parsing admonitions uses a static regular expression created from a pre-defined list of admonitions. A future patch will introduce a feature that needs to parse custom admonitions. Prepare for this by compiling the admonitions regular expression during each function invocation. Strictly speaking, there is a slight performance loss here. But we only run this code as part of displaying help text. I don't think the loss will be noticeable and I don't think we care if it were.

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             mpatch.py
        
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      from __future__ import absolute_import

      import cffi

      import os

      ffi = cffi.FFI()

      mpatch_c = os.path.join(os.path.join(os.path.dirname(__file__), '..',

                                           'mpatch.c'))

      ffi.set_source("_mpatch_cffi", open(mpatch_c).read(),

                     include_dirs=["mercurial"])

      ffi.cdef("""

      struct mpatch_frag {

             int start, end, len;

             const char *data;

      };

      struct mpatch_flist {

             struct mpatch_frag *base, *head, *tail;

      };

      extern "Python" struct mpatch_flist* cffi_get_next_item(void*, ssize_t);

      int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist** res);

      ssize_t mpatch_calcsize(size_t len, struct mpatch_flist *l);

      void mpatch_lfree(struct mpatch_flist *a);

      static int mpatch_apply(char *buf, const char *orig, size_t len,

                              struct mpatch_flist *l);

      struct mpatch_flist *mpatch_fold(void *bins,

                             struct mpatch_flist* (*get_next_item)(void*, ssize_t),

                             ssize_t start, ssize_t end);

      """)

      if __name__ == '__main__':

          ffi.compile()

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				from __future__ import absolute_import

				import cffi
				import os

				ffi = cffi.FFI()
				mpatch_c = os.path.join(os.path.join(os.path.dirname(__file__), '..',
				'mpatch.c'))
				ffi.set_source("_mpatch_cffi", open(mpatch_c).read(),
				include_dirs=["mercurial"])
				ffi.cdef("""

				struct mpatch_frag {
				int start, end, len;
				const char *data;
				};

				struct mpatch_flist {
				struct mpatch_frag base, head, *tail;
				};

				extern "Python" struct mpatch_flist* cffi_get_next_item(void*, ssize_t);

				int mpatch_decode(const char bin, ssize_t len, struct mpatch_flist* res);
				ssize_t mpatch_calcsize(size_t len, struct mpatch_flist *l);
				void mpatch_lfree(struct mpatch_flist *a);
				static int mpatch_apply(char buf, const char orig, size_t len,
				struct mpatch_flist *l);
				struct mpatch_flist mpatch_fold(void bins,
				struct mpatch_flist* (get_next_item)(void, ssize_t),
				ssize_t start, ssize_t end);
				""")

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