63 lines
2.4 KiB
Ruby
63 lines
2.4 KiB
Ruby
#
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# Copyright (C) 2008, 2009 Wayne Meissner
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#
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# This file is part of ruby-ffi.
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#
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# * Neither the name of the Ruby FFI project nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.#
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module FFI
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# This module implements a couple of class methods to play with IO.
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module IO
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# @param [Integer] fd file decriptor
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# @param [String] mode mode string
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# @return [::IO]
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# Synonym for IO::for_fd.
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def self.for_fd(fd, mode = "r")
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::IO.for_fd(fd, mode)
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end
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# @param [#read] io io to read from
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# @param [AbstractMemory] buf destination for data read from +io+
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# @param [nil, Numeric] len maximul number of bytes to read from +io+. If +nil+,
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# read until end of file.
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# @return [Numeric] length really read, in bytes
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#
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# A version of IO#read that reads data from an IO and put then into a native buffer.
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#
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# This will be optimized at some future time to eliminate the double copy.
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#
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def self.native_read(io, buf, len)
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tmp = io.read(len)
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return -1 unless tmp
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buf.put_bytes(0, tmp)
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tmp.length
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end
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end
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end
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