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

hgweb: create dedicated type for WSGI responses...

hgweb: create dedicated type for WSGI responses We have refactored the request side of WSGI processing into a dedicated type. Now let's do the same thing for the response side. We invent a ``wsgiresponse`` type. It takes an instance of a request (for consulation) and the WSGI application's "start_response" handler. The type basically allows setting the HTTP status line, response headers, and the response body. The WSGI application calls sendresponse() to start sending output. Output is emitted as a generator to be fed through the WSGI application. According to PEP 3333, this is the preferred way for output to be transmitted. (Our legacy ``wsgirequest`` exposed a write() to send data. We do not wish to support this API because it isn't recommended by PEP 3333.) The wire protocol code has been ported to use the new API. Differential Revision: https://phab.mercurial-scm.org/D2775

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        Yuya Nishihara
    
cffi: split modules from pure...

              r32512
            
      # mpatch.py - CFFI implementation of mpatch.c

      #

      # Copyright 2016 Maciej Fijalkowski <fijall@gmail.com>

      #

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

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

      from __future__ import absolute_import

      from ..pure.mpatch import *

      from ..pure.mpatch import mpatchError  # silence pyflakes

      from . import _mpatch

      ffi = _mpatch.ffi

      lib = _mpatch.lib

        Yuya Nishihara
    
cffi: remove superfluous "if True" blocks

              r32513
            
      @ffi.def_extern()

      def cffi_get_next_item(arg, pos):

          all, bins = ffi.from_handle(arg)

          container = ffi.new("struct mpatch_flist*[1]")

          to_pass = ffi.new("char[]", str(bins[pos]))

          all.append(to_pass)

          r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container)

          if r < 0:

              return ffi.NULL

          return container[0]

        Yuya Nishihara
    
cffi: split modules from pure...

              r32512
            
        Yuya Nishihara
    
cffi: remove superfluous "if True" blocks

              r32513
            
      def patches(text, bins):

          lgt = len(bins)

          all = []

          if not lgt:

              return text

          arg = (all, bins)

          patch = lib.mpatch_fold(ffi.new_handle(arg),

                                  lib.cffi_get_next_item, 0, lgt)

          if not patch:

              raise mpatchError("cannot decode chunk")

          outlen = lib.mpatch_calcsize(len(text), patch)

          if outlen < 0:

              lib.mpatch_lfree(patch)

              raise mpatchError("inconsistency detected")

          buf = ffi.new("char[]", outlen)

          if lib.mpatch_apply(buf, text, len(text), patch) < 0:

              lib.mpatch_lfree(patch)

              raise mpatchError("error applying patches")

          res = ffi.buffer(buf, outlen)[:]

          lib.mpatch_lfree(patch)

          return res

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Yuya Nishihara cffi: split modules from pure...	r32512	# mpatch.py - CFFI implementation of mpatch.c
		#
		# Copyright 2016 Maciej Fijalkowski <fijall@gmail.com>
		#
		# This software may be used and distributed according to the terms of the
		# GNU General Public License version 2 or any later version.

		from __future__ import absolute_import

		from ..pure.mpatch import *
		from ..pure.mpatch import mpatchError # silence pyflakes
		from . import _mpatch

		ffi = _mpatch.ffi
		lib = _mpatch.lib

Yuya Nishihara cffi: remove superfluous "if True" blocks	r32513	@ffi.def_extern()
		def cffi_get_next_item(arg, pos):
		all, bins = ffi.from_handle(arg)
		container = ffi.new("struct mpatch_flist*[1]")
		to_pass = ffi.new("char[]", str(bins[pos]))
		all.append(to_pass)
		r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container)
		if r < 0:
		return ffi.NULL
		return container[0]
Yuya Nishihara cffi: split modules from pure...	r32512
Yuya Nishihara cffi: remove superfluous "if True" blocks	r32513	def patches(text, bins):
		lgt = len(bins)
		all = []
		if not lgt:
		return text
		arg = (all, bins)
		patch = lib.mpatch_fold(ffi.new_handle(arg),
		lib.cffi_get_next_item, 0, lgt)
		if not patch:
		raise mpatchError("cannot decode chunk")
		outlen = lib.mpatch_calcsize(len(text), patch)
		if outlen < 0:
		lib.mpatch_lfree(patch)
		raise mpatchError("inconsistency detected")
		buf = ffi.new("char[]", outlen)
		if lib.mpatch_apply(buf, text, len(text), patch) < 0:
		lib.mpatch_lfree(patch)
		raise mpatchError("error applying patches")
		res = ffi.buffer(buf, outlen)[:]
		lib.mpatch_lfree(patch)
		return res