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47 lines
1.8 KiB
OCaml
47 lines
1.8 KiB
OCaml
(*
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Copyright (c) 2014, Simon Cruanes
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All rights reserved.
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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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Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. Redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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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*)
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(** {1 Interface and Helpers for bigarrays} *)
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open Bigarray
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let of_bigarray b yield =
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let len = Bigarray.Array1.dim b in
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for i=0 to len-1 do
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yield b.{i}
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done
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let mmap filename =
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fun yield ->
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let fd = Unix.openfile filename [Unix.O_RDONLY] 0 in
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let len = Unix.lseek fd 0 Unix.SEEK_END in
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let _ = Unix.lseek fd 0 Unix.SEEK_SET in
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let b = Bigarray.Array1.map_file fd Bigarray.char Bigarray.c_layout false len in
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try
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of_bigarray b yield;
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Unix.close fd
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with e ->
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Unix.close fd;
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raise e
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